 ጆ፳ዏငඩ࿃ౕႨౕ஭ᡞ  ີዏငඩ࿃ᮨᯮౕ

ពᠪ᜴ᭉᮋጉṕ Ⴈ  ።  ጆ ໆ ‸ ጆ ። ዸᗄང࿃ ఛභၡୟக஥ஃ୫
ῢዸᗄᝡዸᗄႇᮉඳఛභၡ  ଢᛩ ΰ

૔௻೑૕ጆ፳ዏငඩ࿃ౕ

૔ഓ೑૕ጆ፳ඩ࿃ౕጆ፳൑᎜ඩ࿃ౕጆ፳ෘྸ඀࿃ౕጆ፳᫉࿃ౕ

ᭉᣓഥᝤኀಂῴዸᗄང࿃ ፶ᾆ஭ᨇᘓഞᛝ࿃ពᠪ୭஥ୱம

 ጆ፳ዏငඩ࿃ౕႨౕ஭ᡞ  ີዏငඩ࿃ᮨᯮౕ
Ӎ࿜ᬽཽ๎ౕၹ᫑ ఀጟῢዸᗄངῦཽ๎᷸ΰ
షᔓ ᔧῢዸᗄངΰῦངᓯ ௡ჭῢዸᗄངΰῦ ᙱᵹ ᝙ᑳῢዸᗄངΰῦ
ᄝ᫑ ᝤ௡ῢዸᗄངΰῦဎἛ Ⴔཆᵃῢዸᗄངΰῦ౦᫑ ၌ཇῢዸᗄངΰῦ
ᶎ፰ ᴡఋῢ့᷸ሊ៾ངΰ
ῦᠾᨿ ೶ῢ့᷸ሊ៾ངΰῦ᎖့ ෿ᵃῢዸᗄངΰ
Ӎངౕᑃᮋ
ౕ፭ῴ Ⴈ  ።  ጆ ໆ ‸ ጆ ። ౕ༄ῴዸᗄང࿃ ఛභၡୟக஥ஃ୫ ᤎงዚᦰពᠪᐍ % ᐍ௻೑ῴጆ፳ዏငඩ࿃ౕ
ഓ೑ῴጆ፳ඩ࿃ౕῦጆ፳൑᎜ඩ࿃ౕῦጆ፳ෘྸ඀࿃ౕῦጆ፳᫉࿃ౕ
සᱟῴ୧஥୦ஂ஥ Ꮢ ᮨᯮ௻Ặῴ  ዏငඩ൑᎜
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 ജ ജ࿃ᛝ ജ ജ௡᨝ ജ ജ࿃ᛝ ജ ജዏငඩ࿃ᮨᯮౕ  ີᮭᅀᰈᖵῴ ።  ጆ ጆ  ᡞ௡ᵆ ‸ῦᡞగᵆ ‸
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ෳậ᜴ᭉ $ ౕ༄yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyෳậ᜴ᭉ % ౕ༄yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyᡞῬጆ᝗ῴ ።  ጆῢጆΰ
ෳậ᜴ᭉ $ ౕ༄yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyෳậ᜴ᭉ % ౕ༄yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyᡞ  ጆ᝗ῴ ።  ጆῢ።ΰ
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᜴ᭉ᥿ᣘცyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
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-1-

దᴋ୔ୡ୭୫
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ῢ૞ ዸᗄႇᮉඳఛභၡ  ଢᛩ ΰ
ӍዸᗄదᴋᲐᤒஂ୫୆൛ᛡ଍ି༄ง
ዸᗄỰ௤ౄෳஂ୫ୱம஑୼஝  ᛼ᤒ: ᮉဎᵿᤒῢ
૘ዸᗄང࿃૙૘ዸང૙ଜፚ૿ୀଓᲐᤒΰଟఆᲸ
ዸངᮉ᷹ ௨Ჸῢᣉ  ൑ῦᴝ᱗  ജΰ
૘6XLFD૙ᡣదᴋᣅ ,& ଢ଼ம୻ଶ൛ᛡଛଁଲ଍଀ῦᲸഛଛ୳கம୪ଣଛଁଲଏେ૎
ᯐଋଃଣె௨୆ଈᮓଃଔଉ૸૎
KWWSZZZQLLJDWDNRWVXFRMSU\XWRUHOHDVHBU\uWRVXLFDSGIӍ-5 ୆൛ᛡ଍ି༄ง
ᱽᄝᤒῢഛᵹ஭จᛤዹṿΰഛᵹỰ ௨Ჸῢᣉ  ൑ῦᴝ᱗  ജΰᄠᒮ ᣉ  ൑ῢౕ༄ବଣ૘ዸᗄང࿃൫Ự૙଼ାଶ૘ഛᵹỰ૙ଛ௨Ჸଋଓዹ଀ಋ൛ଛ଍ΰ

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ዸᗄང࿃

இஞ୵୩஗
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ዸᗄదᴋஂ୫
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ඪෳ

ഛᵹỰ

-5ᱽᄝᤒ

හෳ

-2-

ᨉዸᗄ

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2016 ೔ຊ์ࣹԽֶձ೥ձɾୈ 60 ճ์ࣹԽֶ౼࿦ձϓϩάϥϜ
‫ޱ‬಄ൃද
ɹൃද࣌ؒ 15 ෼Ҏ಺ɺ౼࿦‫ؚ‬Ί 20 ෼Ҏ಺ϙελʔൃදɹγϣʔτϓϨθϯςʔγϣϯ 1 ෼Ҏ಺ɹϙελʔαΠζ 90 cm (ԣ) × 120 cm (ॎ) Ҏ಺ձ৔ɹ৽ׁେֶ‫ेޒ‬ཛྷΩϟϯύεɹ૯߹‫ڭ‬ҭ‫ڀݚ‬౩ɹ S ձ৔ େߨٛࣨ E260
ɹɹAձ৔ ߨ ٛ ࣨ B255
ɹBձ৔ ߨ ٛ ࣨ B251(*͸एख༏लൃද৆ର৅ߨԋ)ୈ 1 ೔ɹ 9 ݄ 10 ೔ (౔)
A ձ৔
B ձ৔
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9:00 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
डɹ෇

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10:00 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
෱ౡࣄ‫ؔނ‬࿈ 1
࠲௕: ా্‫ࢠܙ‬*
1A01 ์ࣹੑηγ΢ϜͷՏ઒͔Βւਫ΁ͷҠߦʹ൐͏‫ݒ‬୙ཻࢠ͔Βͷ༹୤ʹؔ͢Δ GAM Ϟσϧ͔Βͷߟ࡯
(౦େӃཧ 1 ɺதࠃՊֶӃ 2 ɺஜ೾େ 3 ɺ౦େ
RIC4 ɺ౦‫ژ‬ւ༸େ 5 ) ˓ࡾӜɹً 1 ɺFan Qiaohui2 ɺ‫ݪ܀‬༤Ұ 1 ɺࡔ‫ޱ‬ɹҁ 3 ɺජ֞ ਖ਼‫ ޗ‬4 ɺੴ‫ؙ‬ɹ
ོ 5 ɺਆాয়ଠ 5 ɺߴ‫ڮ‬Յ෉ 1
1A02 ηγ΢Ϝ΍Ϥ΢ૉͷҠߦ‫ڍ‬ಈʹ‫͢΅ٴ‬ఱવ༗‫ػ‬෺ͷӨ‫ڹ‬(౦େӃཧ 1 ɺதࠃՊֶӃ 2 ɺJAEA3 ) ˓ߴ‫ڮ‬Յ
෉ 1 ɺࡾӜɹً 1 ɺFan Qiaohui2 ɺాதສ໵ 3
1A03 ίγΞϒϥͷ์ࣹੑηγ΢Ϝ஝ੵ‫ܦ‬ա(౦େӃ೶ 1 ɺ‫ژ‬େӃ৘ใ 2 ɺ์ࣹઢ҆શϑΥʔϥ
Ϝ 3 ɺҏୡࢢ໾ॴ 4 ) ˓ೋළ௚ొ 1 ɺେख৴ਓ 2 ɺଟాॱҰ࿠ 3 ɺࠇ୔ɹਸ 4 ɺࠜຊ‫ܓ‬հ 1

֩Խֶ 1
࠲௕: ॳ઒༤Ұ
1B01 48 Cr ͷ൒‫ظݮ‬ਫ਼ີଌఆ(౦๺େిࢠޫη 1 ɺ‫ژ‬େ࿍ 2 ɺཧ‫ݚ‬ਔՊη 3 ) ˓٠Ӭӳण 1 ɺߴ‫޾ٶ‬Ұ 2 ɺେ௬ɹ‫ ۈ‬2 ɺӋ৔޺ޫ 3
1B02* ൓௓֩ัू͠ɺԽֶௐ੡ͨ͠ 229m Th ࢼྉͷޫࢠଌఆ
(ࡕେӃཧ 1 ɺ‫ژ‬େ࿍ 2 ɺ౦๺େۚ‫ݚ‬ɾେચ 3 )˓҆ా༐ً 1 ɺּদྑਸ 1 ɺॏՏ༏େ 1 ɺ∁‫޾ٶ‬Ұ 2 ɺେ௬ɹ‫ ۈ‬2 ɺࡾ಄ᡏ໌ 3 ɺࣰ‫ݪ‬ɹް 1
1B03* 80 MeV ୯৭தੑࢠʹΑΔᯁੴߏ੒‫ݩ‬ૉʹର͢Δ֩൓Ԡஅ໘ੵͷଌఆ(ࡕେӃཧ 1 ɺ‫ژ‬େ࿍ 2 ɺࡕେ RCNP3 ɺKEK4 ɺ
JAEA5 ɺཧ‫ ݚ‬6 ɺύσϡʔେ 7 ɺΧϦϑΥϧχΞ
େ 8 ) ˓ೆ෦໌߂ 1 ɺೋ‫ٶ‬࿨඙ 1 ɺॏՏ༏େ 1 ɺߴ‫ڮ‬੒ਓ 1 ɺࣰ‫ݪ‬ɹް 1 ɺؔຊɹढ़ 2 ɺീౡɹߒ 2 ɺౢɹୡࢤ 3 ɺഡ‫ݪ‬խ೭ 4 ɺ‫ݩؠ‬༸հ 5 ɺࣲా੣Ұ 6 ɺ
Marc.W.Caﬀee7 ɺ੢ઘ๜඙ 8‫ٳ‬ɹ‫ܜ‬. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11:10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
෱ౡࣄ‫ؔނ‬࿈ 2
࠲௕: ຳྠ͸Δ͔
1A04* γΠλέഓ஍தͰͷηγ΢Ϝͷଘࡏ‫ܗ‬ଶ(౦๺େӃཧ 1 ɺ‫ࣜג‬ձࣾΩϊοΫε 2 ) ˓ଜ໺Ҫɹ༑ 1 ɺ໦໺߁ࢤ 1 ɺ൘‫ ߂߁ڮ‬2 ɺதౡৎത 2 ɺ‫৻ࢁ܊‬Ұ 2 ɺ໦ଜӫҰ 2 ɺࣞ‫ݪ‬ɹོ 2
1A05* ΢γͷࣃͷ์ࣹೳଌఆʹΑΔ΢γੜଉҬͰͷ Sr-90ɺCs-137 Ԛછͷਪఆ֩Խֶ 2
࠲௕: ઙҪխਓ
1B04* 70 Zn(d, αn)67 Cu ൓ԠʹΑΔ൦෍༻ਫ਼੡
67 Cu ͷ੡଄(ཧ‫ݚ‬ਔՊη 1 ɺRI ‫ڠ‬ձ 2 ) ˓໼ೲ৻໵ 1 ɺӋ৔޺ޫ 1 ɺࣲా੣Ұ 1 ɺখ৿༗‫ ࢠر‬1 ɺߴ‫ڮ‬࿨໵ 1 ɺ౉ᬒ‫ ࢠܚ‬1 ɺ࿬୩༤Ұ࿠ 2 ɺࢁాᜁ༟ 2 ɺদຊ‫װ‬
༤2-5-

(౦๺େӃཧ 1 ɺ౦๺େපӃ 2 ɺ౦๺େӃࣃ 3 ɺ౦๺େࡂ֐‫ ݚ‬4 ɺ‫ؠ‬खେཧ޻ 5 ɺ౦๺େӃ೶ 6 ɺ౦๺େߴ‫ ߏػڭ‬7 ɺ౦๺େՃྸ‫ ݚ‬8 ) ˓খߥҪҰਅ 1 ɺ໦໺߁ࢤ 1 ɺ੢ࢁ७ฏ 1 ɺߴ‫ڮ‬ɹԹ 2 ɺླ໦හ඙ 3,4 ɺਗ਼ਫྑԝ 3 ɺઍ༿ඒྷ 3 ɺখࡔɹ݈ 3,4 ɺࠤʑ໦‫ܒ‬Ұ 3 ɺ෱ాஐҰ 5 ɺү֋‫ܙ‬ඒࢠ 6 ɺԬɹᆹਸ 1,7 ɺؔࠜɹษ 1,7 ɺ෱ຊɹֶ 8 ɺࣰాɹᆹ 3
1A06* ෱ౡୈҰ‫ނࣄൃݪ‬ඃࡂ΢γͷߗ૊৫தͷ
Sr-90 ೱ౓ͷ‫࣌ܦ‬มԽ(౦๺େӃཧ 1 ɺ౦๺େӃࣃ 2 ɺ౦๺େපӃ 3 ɺ౦๺େࡂ֐‫ ݚ‬4 ɺ‫ؠ‬खେཧ޻ 5 ɺ౦๺େӃ೶ 6 ɺ౦๺େߴ‫ ߏػڭ‬7 ɺ౦๺େՃྸ‫ ݚ‬8 ) ˓੢ࢁ७ฏ 1 ɺখߥҪҰਅ 1 ɺ໦໺߁ࢤ 1 ɺਗ਼ਫྑԝ 2 ɺߴ‫ڮ‬ɹ
Թ 3 ɺླ໦හ඙ 2,4 ɺઍ༿ඒྷ 2 ɺখࡔɹ݈ 2,4 ɺࠤʑ໦‫ܒ‬Ұ 2 ɺ෱ాஐҰ 5 ɺү֋‫ܙ‬ඒࢠ 6 ɺԬɹᆹਸ 1,7 ɺؔࠜɹษ 1,7 ɺ෱ຊɹֶ 8 ɺࣰాɹᆹ 2

1B05 50MeV ॏཅࢠরࣹͰൃੜ͢Δߴ଎தੑࢠ
ʹΑΔҩྍ༻์ࣹੑ֩छͷ߹੒‫ڀݚ‬(‫ ߏػྗࢠݪ‬1 ɺྔ‫ ߏػݚ‬2 ɺઍ୅ాςΫϊϧ 3 )˓௩ా࿨໌ 1 ɺ‫ڮ‬ຊ࿨޾ 2 ɺॳ઒༤Ұ 2 ɺ઒୺ํࢠ 2,3 ɺࠤഢल໵ 2,3 ɺືɹଠࢤ 1 ɺ‫ؠ‬ຊ৴೭ 1 ɺӬҪହथ 2 ɺਢ‫ڷ‬༝ඒ 2 ɺ౉ลɹஐ 2 ɺੴԬయࢠ 2
1B06 GARIS-II Λ༻͍ͨϗοτϑϡʔδϣϯ൓
Ԡ 48 Ca+238 U ˠ 286 Cn* ʹؔ͢Δ‫ڀݚ‬(ཧ‫ݚ‬ਔՊη 1 ɺࢁ‫ܗ‬େ 2 ɺ࡛‫ۄ‬େ 3 ɺ৽ׁେӃࣗ 4 ) ˓Ճ࣏େ࠸ 1 ɺ৿ຊ޾࢘ 1 ɺӋ৔޺ޫ 1 ɺएྛହੜ 1 ɺ෢ࢁඒྷ 1,2 ɺࢁ໦͞΍͔ 1,3 ɺখ৿༗‫ ࢠر‬1 ɺ໼ೲ৻໵ 1 ɺ‫ޙ‬౻ਅҰ 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12:15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
‫֩ࢠݪ‬ϓϩʔϒ
෼Պձ

֩Խֶ
෼Պձ

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13:20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
෱ౡࣄ‫ؔނ‬࿈ 3
࠲௕: ຤໦‫ܒ‬հ
*
1A07 ෱ౡ‫ݝ‬઒ມொͰ࠾औͨ͠౔৕ͷ Sr-90 ͷਂ౓෼෍(ࡕେӃཧ 1 ɺࡕେ RI η 2 ɺஜ೾େ 3 ) ˓ླ໦ҍ
ࡊ 1 ɺுɹࢠ‫ ݟ‬1 ɺೋ‫ٶ‬࿨඙ 1 ɺࢁ‫تޱ‬࿕ 2 ɺߴ‫ڮ‬७ࢠ 3 ɺԸా༟Ұ 3 ɺࣰ‫ݪ‬ɹް 1
1A08 ౦ి෱ౡ‫ނࣄൃݪ‬௚‫࠾ʹޙ‬औ͞Εͨେ‫ؾ‬ු༡ਖࢼྉதͷ 129 I/131 I ൺ(ट౎େӃཧ޻ 1 ɺRESTEC2 ɺ౦େӃ޻ 3 ɺ౎࢈ٕ‫ݚ‬η 4 ɺཧ‫ݚ‬ਔՊη 5 ɺ౦େ MALT6 ɺ೔େจཧ 7 ɺ‫ژ‬େ‫ࢠݪ‬࿍ 8 ) ˓ւ࿝‫ݪ‬ɹॆ 1 ɺେӜହ
࢚ 1 ɺനҪ௚थ 1 ɺ௽ా࣏༤ 2 ɺ৿‫ޱ‬༞Ұ 3 ɺӬ઒ӫହ 4 ɺᓎҪɹঢ 4 ɺӋ৔޺ޫ 5 ɺদ࡚ߒ೭ 6 ɺࢁ‫ܗ‬෢༃ 7 ɺӬҪঘੜ 7 ɺؔຊɹढ़ 8
1A09 ౦ి෱ౡ‫ނࣄൃݪ‬௚‫࠾ʹޙ‬औ͞Εͨେ‫ؾ‬ු༡ਖࢼྉͷΦʔτϥδΦάϥϑͱ 129 I/137 Csൺ(ट౎େӃཧ޻ 1 ɺRESTEC2 ɺJAXA3 ɺ౦େӃ޻ 4 ɺࠃ‫ ݚ؀‬5 ɺ౎࢈ٕ‫ ݚ‬6 ɺཧ‫ݚ‬ਔՊη 7 ɺ౦େത෺‫ ؗ‬8 ) ˓େӜହ࢚ 1 ɺւ࿝‫ݪ‬ɹॆ 1 ɺനҪ௚थ 1 ɺ௽ా࣏༤ 2 ɺதౡөࢸ 3 ɺ৿‫ޱ‬༞Ұ 4 ɺେ‫ݪ‬རᚸ 5 ɺӬ઒ӫହ 6 ɺᓎҪɹঢ 6 ɺӋ৔޺ޫ 7 ɺদ࡚ߒ೭ 8֩Խֶ 3
࠲௕: Ӌ৔޺ޫ
*1B07 103 ൪‫ݩ‬ૉϩʔϨϯγ΢Ϝ (Lr) ͷλϯλϧۚଐද໘ʹ͓͚Δ‫ٵ‬ண‫ڍ‬ಈ(ҵ৓େ 1 ɺ‫ ߏػྗࢠݪ‬2 ɺ৽ׁେ 3 ɺ޿ౡେ 4 ɺ໊‫ݹ‬԰େ 5 ɺେࡕେ 6 ɺಙౡେ 7 ɺϚΠϯπେ 8 ɺ
HIM9 ɺGSI10 ɺPSI11 ɺϕϧϯେ 12 ɺFLNR13 )˓ۚ୩༎྄ 1,2 ɺࠤ౻఩໵ 2 ɺઙҪխਓ 2 ɺ௩ా࿨໌ 2 ɺ๛ౢް࢙ 2 ɺਫࣂळࡊ 1,2 ɺ௕ɹ໌
඙ 2 ɺ຀Ҫ޺೭ 2 ɺ੢ඌউ‫ ٱ‬2 ɺኍ੉݈ଠ࿠ 2 ɺӬ໨་Ұ࿠ 1,2 ɺ෌௩஌ത 3 ɺനҪ߳ཬ 3 ɺࠤ౻େี 3 ɺେߐҰ߂ 3 ɺ‫ޙ‬౻ਅҰ 3 ɺ‫ٶ‬Լɹ
௚ 4 ɺ৽‫ٶ‬Ұॣ 4 ɺ໊‫܂‬ɹྑ 4 ɺࣲాཧਘ 5 ɺ‫ాח‬༟ੜ 5 ɺּদྑਸ 6 ɺॏՏ༏େ 6 ɺࡕؒɹ
ູ 7 ɺCh. E. Düllmann8,9,10 ɺK. Eberhardt8,9 ɺ
J. Grund8 ɺJ. V. Kratz8 ɺJ. Runke8 ɺP.
Thörler-Pospiech8,9 ɺ N. Trautmann8 ɺ V.
Pershina10 ɺM. Schädel10 ɺA. Yakushev9,10 ɺ
R. Eichler11,12 ɺP. Steinegger13
1B08 ॏΞΫνϊΠυ‫ݩ‬ૉͷୈҰΠΦϯԽΤωϧΪʔ(‫ ߏػྗࢠݪ‬1 ɺҵ৓େӃ 2 ɺಙౡେ 3 ɺ৽ׁେ 4 ɺ
େࡕେ 5 ɺཧ‫ ݚ‬6 ɺϑϩʔχϯήϯେ 7 ɺGSI8 ɺϚΠϯπେ 9 ɺCERN10 ) ˓ࠤ౻఩໵ 1 ɺઙҪխ
ਓ 1 ɺۚ୩༎྄ 1,2 ɺ௩ా࿨໌ 1 ɺ๛ౢް࢙ 1 ɺਫࣂळࡊ 1,2 ɺ෢ా৾࡞ 3 ɺࡕؒɹູ 3 ɺࠤ౻େี 4 ɺ-6-େߐҰ߂ 4 ɺॏՏ༏େ 5 ɺ຀Ҫ޺೭ 1 ɺ௕ɹ໌඙ 1 ɺࢢ઒ਐҰ 6 ɺӬ໨་Ұ࿠ 1 ɺA. Borschevsky7 ɺM.
Schädel1,8 ɺCh. E. Düllmann8,9 ɺJ. V. Kratz9 ɺ
T. Stora10
1B09* 104 ൪‫ݩ‬ૉ Rf ͷಉ଒‫ݩ‬ૉ ZrɺHf ͷ Aliquat 336/HCl ‫Ͱܥ‬ͷ༹ഔநग़‫ڍ‬ಈ(ࡕେӃཧ 1 ɺࡕେཧ 2 ɺཧ‫ݚ‬ਔՊη 3 ) ˓ۙ౻੒ඒ 1 ɺେ಺Ꮺً 1 ɺӬ੉কߒ 2 ɺॏՏ༏େ 1 ɺ҆ా༐ً 1 ɺּদྑਸ 1 ɺࣰ‫ݪ‬ɹް 1 ɺ޻౻༞ੜ 3‫ٳ‬ɹ‫ܜ‬. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14:30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
෱ౡࣄ‫ؔނ‬࿈ 4
࠲௕: ᴡ౻ɹ‫ܟ‬
1A10 ෱ౡୈҰ‫ൃݪ‬๺੢෦ʹ͓͚Δ 110m Ag/137 Cs
์ࣹೳൺͱ์ࣹੑཻࢠͷؔ܎(‫ ߏػྗࢠݪ‬1 ɺஜ೾େ 2 ) ˓ࠤ౻ࢤ඙ 1 ɺ຤໦‫ܒ‬
հ 2 ɺ࡫ɹެ࿨ 2
1A11* ‫ʹނࣄྗࢠݪ‬ΑΓ์ग़͞ΕΔ์ࣹੑ෺࣭
ͷ৿ྛ২ੜ΁ͷ௜ணɾ༹཭‫ڍ‬ಈͷ‫ڀݚ‬(ࡕେཧ 1 ɺࡕେ RI η 2 ɺஜ೾େੜ໋‫ ڥ؀‬3 ) ˓ுɹࢠ‫ ݟ‬1 ɺೋ‫ٶ‬࿨඙ 1 ɺ٢ଜɹਸ 2 ɺ‫ݹ‬઒ɹ७ 3 ɺࣰ‫ݪ‬ɹް 1

֩Խֶ 4
࠲௕: ௩ా࿨໌
1B10 107 ൪‫ݩ‬ૉϘʔϦ΢Ϝͷ༹ӷԽֶ‫޲ʹڀݚ‬͚ͨ GARIS ΨεδΣοτ૷ஔʹΑΔ Re ಉҐମͷ੡଄ͱϑϩʔ༹ഔநग़‫ث‬Λ༻͍ͨ Re ͷΦϯϥΠϯநग़(ཧ‫ݚ‬ਔՊη 1 ɺ৽ׁେӃࣗવ 2 ɺ‫ ߏػྗࢠݪ‬3 ɺஜ೾େ਺ཧ 4 ɺ౦๺େిࢠޫη 5 ɺࡕେӃཧ 6 ɺΦεϩେ 7 ) ˓খ৿༗‫ ࢠر‬1 ɺӋ৔޺ޫ 1 ɺେߐҰ߂ 2 ɺ๛ౢް࢙ 3 ɺਫࣂळࡊ 3 ɺࠤ౻େี 2 ɺຊࢁཥࠫ 2 ɺ໼ೲ৻໵ 1 ɺ౉ᬒ‫ ࢠܚ‬1 ɺࠤ౻ɹ๬ 1 ɺࢁԼ͞΍͔ 1 ɺాதହ‫ و‬1 ɺՃ࣏େ࠸ 1 ɺ৿ຊ޾࢘ 1 ɺࡔ‫ޱ‬ɹҁ 4 ɺҴ֞७ฏ 4 ɺ٠Ӭӳण 5 ɺॏՏ༏େ 6 ɺּদྑਸ 6 ɺJon Petter Omtvedt7
1B11* Rf ಉ଒‫ݩ‬ૉ Zr, Hf ͷԘԽ෺ʹର͢Δ౳
ԹΨεΫϩϚτάϥϑΟ
(৽ׁେӃࣗવ 1 ɺ৽ׁେཧ 2 ) ˓നҪ߳ཬ 1 ɺԡ‫ݟ‬٢੒ 1 ɺ‫ޙ‬౻ਅҰ 1 ɺେߐҰ߂ 1 ɺ޻౻‫ٱ‬ত 2

S ձ৔. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15:20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ϙελʔൃදγϣʔτϓϨθϯςʔγϣϯʢ࠲௕: ‫ޙ‬౻ਅҰʣ
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16:20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ϙελʔηογϣϯ
‫਺ح‬൪߸ɹ੹೚࣌ؒ (50 ෼). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17:10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
‫਺ۮ‬൪߸ɹ੹೚࣌ؒ (50 ෼). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18:00 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A ձ৔
एखͷձ

B ձ৔
์ࣹԽ෼ੳ֦େ‫ࣄװ‬ձ

-7-

P01* ୩௡‫ׁׯ‬ఈ࣭ʹ͓͚Δ෱ౡୈҰ‫ނࣄॴిൃྗࢠݪ‬༝དྷͷ์ࣹੑηγ΢Ϝͷಈଶ(౦େӃ૯߹) ˓ࢁຊɹॣɺఴ੝ߊ‫ٱ‬ɺখ౾઒উ‫ݟ‬ɺদඌ‫ج‬೭
P02* ଟຎ઒ʹ͓͚Δ์ࣹੑηγ΢ϜͷΩϟϥΫλϦθʔγϣϯ(໌େӃཧ޻ 1 ɺ໌େ‫ڀݚ‬ɾ஌ࡒઓུ‫ ߏػ‬2 ɺ໌େཧ޻ 3 ) ˓Ԟଜਅ‫ ޗ‬1 ɺӽஐ߁ଠ࿠ 1 ɺഡ‫݈ݪ‬ଠ 2 ɺதଜརኍ 3 ɺখ஑༟໵ 3P03౦‫ژ‬࿷ʹ͓͚Δւ༸์ࣹೳௐࠪʕւఈ౔ɺւਫதͷηγ΢Ϝ 134ɺ137 ೱ౓ͷ‫ܦ‬೥มԽʕ(೔ຊ෼ੳηϯλʔ) ˓๛Ԭ৻հɺ৽ాɹࡁɺۚࢠ݈࢘ɺ‫؛‬ຊ෢࢜ɺү֋‫ܒ‬հ

P04੺৓େপपล౔৕ͷ์ࣹੑηγ΢Ϝೱ౓෼෍(౦‫ࢢ౎ژ‬େ޻ 1 ɺ‫܈‬അਫࢼ 2 ɺࠃ‫ ݚ؀‬3 ) ˓௕‫޹ڮ‬ক 1 ɺদӜ࣏໌ 1 ɺࠓ઒ɹफ़ 1 ɺ಺ࢁ޹จ 1 ɺླ໦‫ڀ‬ਅ 2 ɺ౬ઙ༝ඒ 2 ɺ౉ลɹफ़ 2 ɺ৽Ҫɹഹ 2 ɺ໺‫ݪ‬ਫ਼Ұ 3 ɺԬాԟࢠ 1

P05

෱ౡ‫ނࣄൃݪ‬Ҏ߱ͷՏ઒ʹ͓͚Δ༹ଘଶͱఈ࣭౔ʹ͓͚Δηγ΢ϜಉҐମൺมԽ(ஜ೾େ਺ཧ෺ 1 ɺஜ೾େԠ༻Ճ଎‫ ث‬2 ɺ‫ ߏػྗࢠݪ‬3 ɺஜ೾େ਺ཧ෺‫ ܥ‬4 ɺ౦େ MALT5 ) ˓෋ాྋฏ 1 ɺদத఩໵ 2 ɺຊଟਅ‫ ل‬1 ɺࠤ౻ࢤ඙ 3 ɺদଜສणඒ 2 ɺߴ‫ڮ‬ɹ౒ 2 ɺࡔ‫ޱ‬ɹҁ 4 ɺদ࡚ߒ೭ 5 ɺ࡫ɹެ࿨ 2,4 ɺ຤໦‫ܒ‬հ 4P06Πωதͷඍྔ‫ݩ‬ૉ‫ࣹ์ͼٴ‬ੑηγ΢Ϝͷ෼ੳ(੩Ԭେཧ 1 ɺಙౡେ ARREMC2 ɺ౦‫ژ‬େ RIC3 ɺΠϯά 4 ɺ໊‫ݹ‬԰େ໊༪‫ڭ‬त 5 ɺRI ‫ڠ‬ձୌ୔‫ ݚ‬6 ɺ‫ؠ‬खҩେαΠΫϩ 7 ) ˓໼Ӭ੣ਓ 1 ɺࡾ޷߂Ұ 2 ɺජ֞ਖ਼‫ ޗ‬3 ɺ৿ɹҰ޾ 4 ɺ੢ᖒ๜ल 5 ɺ‫ޙ‬౻঵ࢠ 6 ɺੈྑߞҰ࿠ 7

P07* ෱ౡ‫ʹނࣄൃݪ‬༝དྷ͢Δ์ࣹੑηγ΢ϜΛ‫ؚ‬Ήෆ༹ੑཻࢠͷੜ੒໛ٖ࣮‫ݧ‬(ࡕେӃཧ 1 ɺࡕେ RI η 2 ) ˓౻ాক࢙ 1 ɺೋ‫ٶ‬࿨඙ 1 ɺ٢ଜɹਸ 2 ɺࣰ‫ݪ‬ɹް 1
P08* ౎ࢢ͝Έম٫ඈփͷᎢਫॲཧʹΑΔ์ࣹੑηγ΢Ϝͷ༹ग़཈੍(໌େӃཧ޻ 1 ɺ໌େ‫ڀݚ‬ɾ஌ࡒઓུ‫ ߏػ‬2 ɺ໌େཧ޻ 3 ɺϦΨΫ 4 ) ˓෱ాେี 1 ɺ‫ؠ‬ඓ༤‫ ج‬2 ɺ‫ٱ‬
ถౙഅ 3 ɺ౻Ҫ݈‫ ޛ‬1 ɺഡ‫݈ݪ‬ଠ 2 ɺେᔹರ࢘ 4 ɺখ஑༟໵ 3
P09ࣗಈ෼ੳ૷ஔʹΑΔ৯඼ࢼྉதͷετϩϯν΢Ϝ 90 ෼ੳ(೔ຊ෼ੳηϯλʔ 1 ɺࣲ࡚੡࡞ॴ 2 ) ˓൐৔ɹ࣎ 1 ɺদߐొ‫ ٱ‬2 ɺ౻৿ɹ‫ ݑ‬2 ɺ੉‫ށ‬തจ 2 ɺࣇ‫ۄ‬ཧ
ዳ 2 ɺ৿ຊོ෉ 1 ɺࣲ࡚ণ඙ 2

P10ΠΦϯަ‫׵‬๏Λ༻͍ͨւਫத์ࣹੑετϩϯν΢ϜͷԽֶ෼཭(࣊‫ܙ‬ҩେɾΞΠιτʔϓ 1 ɺʢ‫ג‬ʣ೔ཱ੡࡞ॴɾϔϧεέΞ BU2 ɺ໊େɾRIC ෼‫ ؗ‬3 ) ˓ຳྠ͸Δ͔ 1 ɺՃ౻݁Ֆ 2 ɺॹํྑࢸ 3

P11* ‫ݻ‬૬நग़σΟεΫΛ༻͍ͨ์ࣹੑετϩϯν΢Ϝ෼ੳ༻ઢ‫ݯ‬ͷਝ଎࡞੡๏
(໌େӃཧ޻ 1 ɺ໌େ‫ڀݚ‬ɾ஌ࡒઓུ‫ ߏػ‬2 ɺϦΨΫ 3 ɺ໌େཧ޻ 4 ) ˓౻Ҫ݈‫ ޛ‬1 ɺ‫ݪ܀‬༤Ұ 2 ɺେᔹರ࢘ 3 ɺதଜརኍ 4 ɺখ஑༟໵ 4P12୶ਫ‫ܥ‬஍Լਫதͷ Ra ಉҐମ(JAEA1 ɺۚ୔େ LLRL2 ɺஜ೾େ 3 ) ˓෋ా७ฏ 1 ɺ‫ాٶ‬Ղथ 2 ɺᖛɹࠀ޺ 1 ɺࡔ‫ޱ‬ɹҁ 3 ɺ௕ඌ੣
໵ 2 ɺࢁຊ੓ّ 2

P13* έΠࢎԘ߭෺தτϦ΢Ϝ͓Αͼϥδ΢ϜͷಉҐମͷଘࡏ‫ܗ‬ଶ(໌େӃཧ޻ 1 ɺ໌େ‫ڀݚ‬ɾ஌ࡒઓུ‫ ߏػ‬2 ɺ໌େཧ޻ 3 ) ˓Ԙ‫ ݐྑݪ‬1 ɺ‫ݪ܀‬༤Ұ 2 ɺதଜརኍ 3 ɺখ஑༟໵ 3
P14

TEVA ϨδϯσΟεΫΛ༻͍ͨ౔৕தʹ‫·ؚ‬ΕΔϓϧτχ΢Ϝਝ଎ఆྔ๏ͷ‫ݕ‬౼(ۚ୔େӃࣗવ 1 ɺۚ୔େֶࡍη 2 ɺۚ୔େཧ޻ 3 ) ˓ࢁकߤฏ 1 ɺ্ਿਖ਼थ 2 ɺԣࢁ໌඙ 3
-8-

P15

ཻࢠঢ়ϓϧτχ΢Ϝͷਫ਼੡࣌‫ظ‬ਪఆͷͨΊͷΞϝϦγ΢Ϝ α ઢଌఆ๏ͷ‫ݕ‬౼(‫݈ా҆˓ )ߏػྗࢠݪ‬Ұ࿠ɺླ໦େีɺۚᖒ࿨ਔɺ‫ٶ‬ຊϢλΧɺߐࡔจ޹ɺؒฑਖ਼໌

P16ΞΫνϊΠυΛ‫ؚ‬Ήશࣗಈ‫ۃ‬ඍྔଟ‫ݩ‬ૉஞ࣍෼཭๏ͷ։ൃ(‫ٶ˓ )ߏػྗࢠݪ‬ຊϢλΧɺ҆ా݈Ұ࿠ɺؒฑਖ਼໌

P17ిࢠεϐϯ‫ڞ‬໐๏ʹΑΔখࣇͷ֎෦ඃ͹͘ઢྔͷਪఆ(౦๺େߴ‫ ߏػڭ‬1 ɺ౦๺େӃཧ 2 ɺ౦๺େֶපӃ 3 ɺ౦๺େӃࣃ 4 ) ˓Ԭɹᆹਸ 1,2 ɺߴ‫ڮ‬ɹԹ 3 ɺখߥҪҰਅ 2 ɺ੢ࢁ७ฏ 2 ɺ໦໺߁ࢤ 2 ɺؔࠜɹษ 1,2 ɺਗ਼ਫྑԝ 4 ɺઍ༿ඒྷ 4 ɺླ໦හ඙ 4 ɺখࡔɹ݈ 4 ɺࠤʑ໦‫ܒ‬Ұ 4 ɺࣰాɹᆹ 4

P18

෱ౡ‫҆ڥ؀‬શηϯλʔʹ͓͚Δ‫ڥ؀‬ճ෮΁ͷऔ૊Έ(‫ߏػྗࢠݪ‬෱ౡ) ˓Ѩ෦‫׮‬৴ɺ٢઒ӳथɺ࣌ᖒ޹೭ɺઙ࠺৽Ұ࿠

P19෱ౡࢁ஍৿ྛʹ͓͚Δ஍ද໘ྲྀग़෺࣭ͱۭؒઢྔ཰ͷਪҠ(‫ߏػྗࢠݪ‬෱ౡ) ˓ੴҪ߁༤ɺࡾా஍উতɺѨ෦‫׮‬৴ɺ৽ཬ஧࢙

P20์ࣹੑ෺࣭ͷେ‫ؾ‬தͰͷ༌ૹΛ୲͏ΤΞϩκϧཻࢠͷฏ‫ͱܘཻۉ‬Խֶ‫ܗ‬(৴भେ‫ڭ‬ҭ 1 ɺ৴भେӃ‫ڭ‬ҭ 2 ) ˓ଜদ‫ٱ‬࿨ 1 ɺদ‫ݪ‬སࠫࢠ 1 ɺඉ౉ਸ਼‫ װ‬2 ɺۙ౻ɹѯ 1

P21೔ຊࠃ಺શҬʹ͓͚Δද૚౔৕த 129 I ௐࠪɹ– ෱ౡୈҰ‫ނࣄൃݪ‬ͷӨ‫– ڹ‬(೔ຊ෼ੳηϯλʔ) ˓Ԧɹ‫ڿ‬ਫɺࢁಓඒ࿨ࢠɺࣰ‫޺ݪ‬จɺ൐৔ɹ࣎ɺଠా༟ೋɺү֋‫ܒ‬հ

P22* ๺‫ۃ‬ւ-๺ଠฏ༸ʹ͓͚ΔւਫதϤ΢ૉ 129 ͷೱ౓෼෍(೔େӃ૯߹‫ ج‬1 ɺ೔େจཧ 2 ɺJAMSTEC3 ɺ౦େത෺‫ ؗ‬4 ) ˓޻౻ɹً 1 ɺࢁ‫ܗ‬෢༃ 2 ɺӬҪঘ
ੜ 2 ɺ‫۽‬ຊ༤Ұ࿠ 3 ɺ੢໺ໜਓ 3 ɺদ࡚ߒ೭ 4
P23৽ׁ‫಺ݝ‬ͷ‫ڥ؀‬ਫதτϦν΢Ϝೱ౓Ϩϕϧ(৽ׁ‫ࣹ์ݝ‬ઢ‫ࢹ؂‬ηϯλʔ) ˓ਗ਼໺ࢻࢠɺߵ૥༞໵ɺࢁ⃻‫ڵ‬थɺ‫ాؙ‬จ೭

P24* ޫ଄‫̙̏ࣜํܗ‬ϓϦϯλͱఱવ์ࣹੑ֩छΛར༻ͨ͠໛ٖΨϯϚઢ‫ݯ‬ͷ։ൃ(ঘ឴ֶӃେੜ‫ ڥ؀׆‬1 ɺ໌࣏େཧ޻ 2 ɺେࡕେ҆શӴੜ 3 ) ˓੢ؒ໦࢙৫ 1 ɺখ஑༟໵ 2 ɺߴ‫ݡڮ‬
ਉ 3 ɺᴡ౻ɹ‫ ܟ‬1
P25

੨ಔ‫ث‬ͷ 14 C ೥୅ଌఆͷͨΊͷࢼྉௐ੡๏ͷ։ൃ ʕԘ‫ج‬ੑ୸ࢎಔɾ྘੨ɾ޸੃ੴͷࣗ‫ݾ‬෼ղԹ౓ʹ͍ͭͯʕ(໊େ ISEE1 ɺ‫ࣉڵݩ‬จԽࡒ‫ ݚ‬2 ) ˓খా‫ و׮‬1 ɺࢁా఩໵ 2 ɺ௩ຊහ෉ 2

P26

CO2 ΨεΠΦϯ‫ݯ‬Λ༻͍ͨਝ଎ 14 C-AMS ͷ։ൃ(ஜ೾େ AMS) ˓দத఩໵ɺ࡫ɹެ࿨ɺࡉ୩੨ࣇɺߴ‫ڮ‬ɹ౒ɺদଜສणඒɺ຤໦‫ܒ‬հ

P27* ϑϩʔΠϯδΣΫγϣϯ෼ੳ๏Λར༻ͨ͠ 4 ଒‫ݩ‬ૉ ZrɺHf ͷΩϨʔτநग़(৽ׁେӃࣗ 1 ɺ৽ׁେཧ 2 ɺཧ‫ݚ‬ਔՊη 3 ) ˓ࢁా྄ฏ 1 ɺେߐҰ߂ 1 ɺ‫ޙ‬౻ਅҰ 1 ɺ޻౻‫ٱ‬ত 2 ɺӋ৔޺ޫ 3 ɺখ৿༗‫ ࢠر‬3
P28

Rf ͷಉ଒‫ݩ‬ૉ ZrɺHf ͷ 4-ΠιϓϩϐϧτϩϙϩϯΛ༻༹͍ͨഔநग़‫ڍ‬ಈ(৽ׁେӃࣗ 1 ɺ৽ׁେཧ 2 ɺཧ‫ݚ‬ਔՊη 3 ) ˓େߐҰ߂ 1 ɺࢁా྄ฏ 1 ɺ‫ޙ‬౻ਅҰ 1 ɺ޻౻‫ٱ‬ত 2 ɺӋ৔޺ޫ 3 ɺখ৿༗‫ ࢠر‬3

P29* 5 ଒‫ݩ‬ૉ Nb, Ta ͷϑοԽਫૉࢎ͔Βͷ Aliquat 336 थࢷ΁ͷநग़ɿ෼഑܎਺ͷநग़ࡎೱ౓ґଘੑͷ‫ݕ‬౼(৽ׁେӃࣗ 1 ɺཧ‫ݚ‬ਔՊη 2 ɺ‫ ߏػྗࢠݪ‬3 ɺ౦๺େిࢠޫη 4 ɺ৽ׁେཧ 5 ) ̋ࠤ౻େี 1 ɺଜ্ণ࢙ 1 ɺେߐҰ߂ 1 ɺຊࢁཥࠫ 1 ɺӋ৔޺ޫ 2 ɺখ৿༗‫ ࢠر‬2 ɺ๛ౢް࢙ 3 ɺਫࣂळࡊ 3 ɺ٠Ӭӳण 4 ɺ‫ޙ‬౻ਅҰ 1 ɺ޻౻‫ٱ‬ত 5-9-

P30* 5 ଒‫ݩ‬ૉ Nb, Ta ͷԘࢎ༹ӷ͔ΒͷτϦΠιΦΫνϧΞϛϯʹΑΔ༹ഔநग़ʕTa τϨʔαʔௐ੡๏ͷӨ‫ڹ‬ʕ(৽ׁେӃࣗ 1 ɺ‫ ߏػྗࢠݪ‬2 ɺཧ‫ݚ‬ਔՊη 3 ɺ৽ׁେཧ 4 ) ˓ຊࢁཥࠫ 1 ɺେߐҰ߂ 1 ɺଜ্ণ࢙ 2 ɺӋ৔޺ޫ 3 ɺ‫ޙ‬౻ਅҰ 1 ɺ޻౻‫ٱ‬ত 4
P31* ϑϩʔநग़૷ஔΛ༻͍ͨϑοԽਫૉࢎ-Aliquat336 ‫͚͓ʹܥ‬Δλϯάεςϯͷ༹ഔநग़(ҵେӃཧ޻ 1 ɺ‫ ߏػྗࢠݪ‬2 ɺཧ‫ݚ‬ਔՊη 3 ) ˓ਫࣂळࡊ 1,2 ɺ๛ౢް࢙ 2 ɺখ৿༗‫ ࢠر‬3 ɺӋ৔޺
ޫ 3 ɺઙҪխਓ 2 ɺ௩ా࿨໌ 2 ɺࠤ౻఩໵ 2 ɺӬ໨་Ұ࿠ 1,2
P32ΞελνϯͷࢎԽؐ‫༹ͱݩ‬ഔநग़‫ڍ‬ಈ(‫ߏػྗࢠݪ‬ઌ୺‫ ݚ‬1 ɺࡕେӃཧ 2 ɺཧ‫ݚ‬ਔՊη 3 ɺࡕେཧ 4 ɺࡕେ RI η 5 ) ˓๛ౢް࢙ 1,2,3 ɺਆాߊॆ 2 ɺ஑ా୎ւ 4 ɺ٢ଜɹਸ 5 ɺࣰ‫ݪ‬ɹް 2 ɺ໼ೲ৻໵ 3 ɺখ৿༗‫ ࢠر‬3 ɺӋ৔޺ޫ 3

P33ॏཅࢠরࣹͰൃੜ͢ΔՃ଎‫ث‬தੑࢠʹΑͬͯ੡଄͢Δ͕Μ࣏ྍ༻ 67 Cu ͷߴ७౓Խʹؔ͢Δ‫ݕ‬౼(ྔ‫ ߏػݚ‬1 ɺઍ୅ాςΫϊϧ 2 ɺ‫ ߏػྗࢠݪ‬3 ) ˓‫ڮ‬ຊ࿨޾ 1 ɺ઒୺ํࢠ 2 ɺࠤഢल໵ 2 ɺࠤ౻ढ़
Ұ 2 ɺ௩ా࿨໌ 3 ɺਢ‫ڷ‬༝ඒ 1 ɺӬҪହथ 1 ɺॳ઒༤Ұ 1 ɺ౉ลɹஐ 1 ɺੴԬయࢠ 1

P34* 211 Rn–211 At δΣωϨʔλʔ։ൃΛ໨తͱͨ͠γϦϯδີ෧நग़‫ܥ‬ͷ At/Rn ෼཭܎਺ͷ‫ڀݚ‬(ۚ୔େӃࣗવ 1 ɺۚ୔େཧ޻ 2 ɺྔ‫ࢠྔߏػݚ‬ϏʔϜ 3 ɺۚ୔େҩༀอ݈ 4 ) ˓ࢁా‫ه‬େ 1 ɺ৽ɹ༟‫ ت‬2 ɺେߐਸଠ 2 ɺଜ্‫ݓ‬ౙ 2 ɺ‫ڮ‬ຊ࿨޾ 3 ɺ੢தҰ࿕ 3 ɺ࿯ࢁ޾৴ 4 ɺԣࢁ໌඙ 2
P35* थࢷ୲࣋༗‫ػ‬εζࢼༀΛ༻͍ͨ 211 At ෼཭/ඪࣝͷࢼΈ(ࡕେӃཧ 1 ɺ‫ߏػྗࢠݪ‬ઌ୺η 2 ɺࡕେཧ 3 ɺࡕେ RI η 4 ) ˓ਆాߊॆ 1 ɺ๛ౢް࢙ 2 ɺ஑ా୎ւ 3 ɺ٢ଜɹਸ 4 ɺࣰ‫ݪ‬ɹް 1
P36ϦΞϧλΠϜ RI ΠϝʔδϯάγεςϜΛ༻͍ͨ২෺ମ಺‫ݩ‬ૉಈଶͷՄࢹԽٕज़ͷ։ൃ(౦େӃ೶ 1 ɺJST PRESTO2 ) ˓ਿా྄ฏ 1 ɺখྛಸ௨ࢠ 1 ɺኍ੉ɹ೶ 1 ɺా໺Ҫ‫ܚ‬ଠ࿕ 1,2 ɺத੢༑ࢠ 1

P37* J-PARC MUSE ͷେ‫౓ڧ‬ϛϡΦϯϏʔϜΛ༻͍ͨϛϡΦϯ‫ࢠݪ‬औΓग़࣮͠‫ݧ‬(ࡕେӃཧ 1 ɺߴΤω‫ ݚ‬2 ) ˓٢ాɹ߶ 1 ɺೋ‫ٶ‬࿨඙ 1 ɺҴ֞ɹ੣ 1 ɺ๛ా‫ذ‬૱ 1 ɺ੨໦ɹॱ 1 ɺՏଜ੒ഹ 2 ɺࡾ୐߁ത 2 ɺࣰ‫ݪ‬ɹް 1
P38* ϝεό΢Ξʔ෼ޫ๏ʹΑΔίϯυϥΠτᯁੴதͷమ‫ؚ‬༗߭෺૊੒ͷ‫ڀݚ‬(ۚ୔େӃࣗવ 1 ɺۚ୔େཧ޻ 2 ɺट౎େӃཧ޻ 3 ) ˓த઒ਅ݁ 1 ɺՃೲ߁େ 1 ɺࠤ౻ɹব 1,2 ɺւ࿝‫ݪ‬ɹॆ 3
P39ௗւࢁ࿢ຒ໦‫ͦͼٴ‬ͷփʹ‫·ؚ‬ΕΔమͷԽֶঢ়ଶ(ळ‫ݝ‬େ໦‫ ݚ‬1 ɺ੒᪟େཧ޻ 2 ɺେಉେ‫ڭ‬ཆ 3 ) ˓ࢁ಺ɹൟ 1 ɺ‫܀‬ຊ߁࢘ 1 ɺࢁ䒎ਸ೭ 2 ɺञҪཅҰ 3

P40* Sr(Sn1−x Fex )O3 ͷ࣓‫ؾ‬ಛੑʹ‫ ͢΅ٴ‬Ca ͷஔ‫ޮ׵‬Ռ(໌େӃཧ޻ 1 ɺཧՊେ 2 ɺ౦େ 3 ) ˓ླ໦ໜੈ 1 ɺਫপৎ࢙ 1 ɺ໺ଜ‫و‬ඒ 1,2 ɺԬᖒɹް 3 ɺখ஑༟
໵1
P41ߴൺ์ࣹೳϓϩϝν΢Ϝ಺แϑϥʔϨϯ߹੒ʹ޲͚ͨɺϓϩϝν΢Ϝͷ෼཭ਫ਼੡(ट౎େӃཧ޻ 1 ɺ౦๺େిࢠޫη 2 ) ˓‫಺ٶ‬ᠳ࠸ 1 ɺ ळࢁ࿨඙ 1 ɺ٠Ӭӳण 2 ɺ‫ٱ‬෌໦ࢤ࿠ 1

P42ϞϦϒσϯͷಉҐମ෼཭܎਺ʹର͢ΔՁ਺ґଘੑ(௕ԬٕՊେӃ޻ 1 ɺ౦޻େઌಋ‫ࢠݪ‬࿍‫ ݚ‬2 ɺۙେཧ޻ 3 ) ˓ཱՖɹ༏ 1 ɺۚෑརོ 2 ɺ໺্խ৳ 3 ɺླ໦ୡ໵ 1 ɺ໺ଜխ෉ 2

P43ཅిࢠ์ग़֩छʹΑΔճసମ‫ࠪݕ‬๏ͷ։ൃ(ཧ‫ݚ‬ਔՊη) ˓ਆ‫ݪ‬ɹਖ਼ɺ٢ాɹರɺӋ৔޺ޫ- 10 -

P44

J-PARC ANNRI ʹ͓͚Δ์ࣹੑ֩छͷඇഁյ෼ੳ
(‫ ߏػྗࢠݪ‬1 ɺट౎େ 2 ) ˓౻ɹெี 1 ɺւ࿝‫ݪ‬ɹॆ 2 ɺԫ໌ً 1 ɺ໦ଜɹರ 1 ɺதଜৃ࢘ 1 ɺ੉઒
ຑཬࢠ 1

ୈ 2 ೔ɹ 9 ݄ 11 ೔ (೔)
A ձ৔
B ձ৔
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9:00 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ҩֶ౳ʹ͓͚Δ RI ར༻ 1
࠲௕: ٠Ӭӳण
2A01 ‫ߏػྗࢠݪ‬λϯσϜՃ଎‫Ͱث‬ͷ 7 Li ΠΦϯϏʔϜΛ༻͍ͨΞελνϯͱϤ΢ૉ์ࣹੑಉҐମͷ੡଄ͱར༻
(ྔ‫ࢠྔߏػݚ‬ϏʔϜ 1 ɺۚ୔େҩༀอ݈ 2 ɺۚ୔େʢ‫ߏػྗࢠݪ‬ʣ3 ɺۚ୔େཧ޻ 4 ) ˓੢தҰ
࿕ 1 ɺ࿯ࢁ޾৴ 2 ɺલాӳଠ 3 ɺ୩‫୓ޱ‬ւ 3 ɺԣࢁ໌඙ 4 ɺ‫ڮ‬ຊ࿨޾ 1
2A02 ཧ‫͚͓ʹݚ‬Δ At-211 ੡଄(ཧ‫ݚ‬ਔՊη 1 ɺ‫ ߏػྗࢠݪ‬2 ɺࡕେ 3 ɺRI ‫ڠ‬ձ 4 ) ˓ࠤ౻ɹ๬ 1 ɺ໼ೲ৻໵ 1 ɺӋ৔޺ޫ 1 ɺখ৿༗‫ ࢠر‬1 ɺࣲా੣Ұ 1 ɺ౉ᬒ‫ ࢠܚ‬1 ɺՃ࣏େ࠸ 1 ɺ๛ౢް࢙ 1,2,3 ɺߴ‫ڮ‬࿨໵ 1 ɺদຊ‫װ‬
༤4
2A03 ίϯϓτϯΧϝϥΠϝʔδϯά༻ Tc-95m‫ ͼٴ‬Tc-96 ͷੜ੒‫ڀݚ‬(ྔ‫ ߏػݚ‬1 ɺ‫ ߏػྗࢠݪ‬2 ɺ‫ژ‬େ 3 ɺ౦ւେ 4 ɺ‫౎ژ‬ༀେ 5 ) ˓ॳ઒༤Ұ 1 ɺ௩ా࿨໌ 2 ɺ‫ڮ‬ຊ࿨
޾ 1 ɺࠤ౻఩໵ 2 ɺઙҪխਓ 2 ɺ๛ౢް࢙ 2 ɺӬҪହथ 1 ɺ୩৿ɹୡ 3 ɺԂా৳໵ 3 ɺ‫ג‬໦ॏਓ 4 ɺ໦ଜ‫׮‬೭ 5 ɺߴా३࢙ 3 ɺਫຊ఩໵ 3 ɺૣ઒ַਓ 1
2A04 Ճ଎‫ث‬தੑࢠར༻ 99 Mo ੡଄ʹ͓͚Δೱॖ
100 MoO ࢼྉͷճऩͱ࠶ར༻
3(ઍ୅ాςΫϊϧ 1 ɺྔ‫ ߏػݚ‬2 ) ˓઒୺ํࢠ 1 ɺຊੴষ࢘ 1 ɺࠤഢल໵ 1 ɺ஛಺એത 1 ɺ‫ڮ‬ຊ࿨޾ 2 ɺॳ઒༤Ұ 2 ɺӬҪହथ 2ಉҐମԽֶ/‫֩ࢠݪ‬ϓϩʔϒ 1
࠲௕: ࠤ౻ɹব
2B01 ߴ଎தੑࢠরࣹʹΑΔ֩൓௓ޮՌΛ༻͍ͨ์ࣹੑ Sr@C60 ͷੜ੒(ट౎େӃཧ޻ 1 ɺྔ‫ ߏػݚ‬2 ) ˓ळࢁ࿨඙ 1 ɺ‫ٶ‬
Լ༝߳ 1 ɺॳ઒༤Ұ 2 ɺ‫ٱ‬෌໦ࢤ࿠ 1
2B02 Խֶతؐ‫ݩ‬൓ԠΛ༻͍ͨۚଐ಺แϑϥʔϨϯ෼཭ͷ৚݅‫ݕ‬౼(ट౎େӃཧ޻ 1 ɺཧ‫ݚ‬ਔՊη 2 ) ˓ాத߁հ 1 ɺळࢁ࿨඙ 1 ɺӋ৔޺ޫ 2
2B03* ࢎૉɺེԫ‫΁ࢠݪ‬ͷϛϡΦϯั֫֬཰ͷ෼ࢠʹΑΔมԽ
(ࡕେӃཧ 1 ɺ‫ ߏػྗࢠݪ‬2 ɺߴΤω‫ ݚ‬3 ɺࠃࡍ‫ج‬ಜ‫ڭ‬େ 4 ) ˓٢ాɹ߶ 1 ɺೋ‫ٶ‬࿨඙ 1 ɺҴ֞ɹ
੣ 1 ɺҏ౻ɹ޹ 2 ɺ඘ຊɹ࿱ 2 ɺετϥοαʔɾύτϦοΫ 3 ɺՏଜ੒ഹ 3 ɺԼଜߒҰ࿠ 3 ɺࡾ୐߁ത 3 ɺࡾӜଠҰ 3 ɺ‫ٱ‬อ‫ ࠸ݠ‬4 ɺࣰ‫ݪ‬ɹް 1
2B04 ϛϡΦϯ‫ࢠݪ‬িಥʹ͓͚ΔϛϡΦϯ৮ഔ֩༥߹൓Ԡ཰ͷ‫ࢉܭ‬(౦๺େཧ) ˓໦໺߁ࢤ

‫ٳ‬ɹ‫ܜ‬. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10:30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ҩֶ౳ʹ͓͚Δ RI ར༻ 2/ͦͷଞ࠲௕: ໼Ӭ੣ਓ
2A05 ΨϯϚΧϝϥʹΑΔਖ਼ৗϥοτͷΞελν
ϯ-211 ͱϤ΢ૉ-123 ͷߕঢ়થ͓Αͼң΁ͷूੵධՁ(ࡕେӃҩ 1 ɺ৿ϊ‫ٶ‬ΫϦχοΫ 2 ɺ‫ژ‬෎ҩେ 3 ɺࡕେӃཧ 4 ) ˓஑ా൏ਓ 1 ɺ౉ล৾Ұ࿠ 2 ɺ∁‫ڮ‬- 11 -‫֩ࢠݪ‬ϓϩʔϒ 2
࠲௕: ࢁా߁༸
*2B05 ઁಈ֯૬ؔ๏ʹΑΔෆ७෺Λυʔϓ࢛ͨ͠ࢎԽࡾమͷ‫ॴہ‬৔‫࡯؍‬(ۚ୔େӃࣗવ 1 ɺۚ୔େཧ޻ 2 ) ˓஛த૱ଡ 1 ɺ౻ᖒরޭ 1 ɺࠤ౻ɹব 2
2B06 ϖϩϒεΧΠτ‫ࢎܕ‬Խ෺ La0.7 Ca0.3 MnO3

੒ਓ 3 ɺࣰ‫ݪ‬ɹް 4 ɺԼ੉઒‫ ٱܙ‬1 ɺാᖒɹॱ 1
2A06 ޿ౡɾ௕࡚‫ݪ‬രඃരऀʹؔΘΔ‫؞ܗݻ‬ͷ਺ֶϞσϧ(ࡕେ໊༪‫ڭ‬त 1 ɺ‫ژ‬େ࿍ 2 ) ˓അ৔ɹ޺ 1 ɺߴ‫ٶ‬޾Ұ 2
2A07 ϕʔλઢεϖΫτϩϝτϦʔ(͓஡େཧ 1 ɺJRIA2 ɺαϯΰόϯ 3 ) ˓‫ాݹ‬ӻ
ࢠ 1 ɺ੕໺๖ੜ 1 ɺ૲ؒ‫ܦ‬ೋ 2 ɺ౉ล༟෉ 3
2A08 ӷମϥΠτΨΠτΛ༻͍Δ৽͍͠ γ ઢ‫ݕ‬ग़‫ث‬ͷ։ൃʢୈҰใʣ(౦ཧେ 1 ɺ࢈૯‫ ݚ‬2 ɺU-VIX3 ɺ౦େ૯ 4 ) ˓໺ଜ‫و‬ඒ 1 ɺ༘໦ɹজ 2 ɺࡉా࿨෉ 3 ɺ৿‫ށ‬༞޾ 3 ɺࣉҪོ޾ 4 ɺࣉౡઍথ 1தͷ௒ඍࡉ৔ଌఆ
(ۚ୔େཧ޻ 1 ɺҰؔߴઐ 2 ɺ‫ژ‬େ࿍ 3 ) ˓ࠤ౻ɹব 1 ɺখদాࠫ໵Ճ 2 ɺେ‫ٱ‬อՅߴ 3
2B07 ZnO ͷࢎૉۭ޸‫ܗ‬੒աఔʹ͓͚Δงғ‫ؾ‬ґଘੑ(Ұؔߴઐ 1 ɺۚେཧ޻ 2 ɺ‫ژ‬େ࿍ 3 ) ˓খদాࠫ
໵Ճ 1 ɺࠤ౻ɹব 2 ɺେ‫ٱ‬อՅߴ 3
2B08* ࢎԽѥԖ୯݁থதͷۭ޸‫֫͞ัʹؕܽܕ‬Εͨෆ७෺ਫૉͷ೤త‫ڍ‬ಈ(ۚ୔େӃࣗવ 1 ɺۚ୔େཧ޻ 2 ɺࡕେӃཧ 3 ) ˓ਗ਼ਫ߂௨ 1 ɺࠤ౻ɹব 2 ɺࡾ‫ ࢚جݪ‬3 ɺ౻ᖒরޭ 1 ɺ෱ాޫॱ 3 ɺদଟ݈ࡦ 3

னɹ৯

S ձ৔
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13:00 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
์ࣹԽֶ౼࿦ձ 60 ճ‫ه‬೦ߨԋʢୈҰ෦ʣ࠲௕: ޻౻‫ٱ‬ত

2S01 GARIS Λ༻͍ͨ௒ॏ‫ݩ‬ૉ‫ڀݚ‬ͷ࠷લઢ—৽‫ݩ‬ૉೝఆ·ͰͷಓͷΓɺप‫ظ‬දͷ֦ுΛ໨ࢦͨ͠௅ઓ—(ཧ‫ݚ‬ਔՊη 1 ɺ‫۝‬େཧ 2 ) ৿ాߒհ 1,2 ɺ৿ຊ޾࢘ 1 ɺ˓Ճ࣏େ࠸ 1 ɺӋ৔޺ޫ 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14:00 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
‫ٳ‬ɹ‫ܜ‬. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14:15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ʢୈೋ෦ʣ࠲௕: Ӭ໨་Ұ࿠

2S02 Gas Phase Chemistry of Superheavy Elements(GSI) Alexander Yakushev
2S03 103 ൪‫ݩ‬ૉͰΈ͚ͭͨप‫ظ‬දͷ΄͜Ζͼ ʙ‫ݩ‬ૉप‫ظ‬ද͕ॻ͖มΘΔʁʙ(‫ࠤ )ߏػྗࢠݪ‬౻఩໵. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15:35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A ձ৔૯ձɾࣸਅࡱӨ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17:15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
όεҠಈ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18:30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
࠙਌ձANA Ϋϥ΢ϯϓϥβϗςϧ৽ׁ- 12 -

ୈ 3 ೔ɹ 9 ݄ 12 ೔ (݄)
A ձ৔
B ձ৔
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9:00 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
‫ࣹ์ڥ؀‬ೳ 1
࠲௕: ߴ‫޾ٶ‬Ұ
*
3A01 τϦν΢ϜճऩͷͨΊͷࢎԽಔͷද໘ੵґଘੑ(੩େӃ૯ 1 ɺ෋ࢁେਫૉ‫ ݚ‬2 ɺ੩େཧֶྖҬ 3 )˓২ଜ༗‫ ر‬1 ɺࡩాᠳେ 1 ɺ౻ా‫ ܙܒ‬1 ɺ౦ɹᇈհ 1 ɺ‫ݪ‬ɹਖ਼‫ ݑ‬2 ɺ೾ଟ໺༤࣏ 2 ɺా‫ޱ‬ɹ໌ 2 ɺۙా୓ະ 3 ɺେ໼‫ ٱګ‬3
3A02 ೩ম๏ʹΑΔ༗‫ܕ߹݁ػ‬τϦν΢Ϝͷ෼ੳʹ͍ͭͯ(‫˓ )ڠ؀۝‬ౡɹ௕ٛɺ‫ۄ‬རढ़࠸
3A03 ৽ׁ‫͚͓ʹݝ‬Δ௕൒‫ࣹ์ظݮ‬ੑ֩छ෼෍
ௐࠪ(৽ׁ‫ࣹ์ݝ‬ઢ‫ࢹ؂‬ηϯλʔ) ˓ླ໦‫و‬തɺେ໺फ़࢙ɺࢁ⃻‫ڵ‬थ‫֩ࢠݪ‬ϓϩʔϒ 3
࠲௕: ञҪཅҰ
*
3B01 ௿Թ C2 H4 /Ar ϚτϦοΫεதͷ‫ ཱݽ‬57 Fe‫ࢠݪ‬ͷԽֶঢ়ଶɹ
(ి௨େӃ 1 ɺཧ‫ ݚ‬2 ɺ౦ཧେཧ 3 ɺICU4 ɺࡕେཧ 5 ɺۚ୔େཧ޻ 6 ɺ๺཮େༀ 7 ɺྔ‫์ߏػݚ‬ҩ‫ ݚ‬8 ) ˓ླ໦੟ਓ 1 ɺ୩઒঵ଠ࿠ 1 ɺࠤ౻༞‫و‬
ࢠ 1 ɺখྛٛஉ 1,2 ɺࢁా߁༸ 3 ɺ‫ٱ‬อ‫ ࠸ݠ‬4 ɺࡾ‫ ࢚جݪ‬5 ɺ௕༑ɹܼ 2 ɺࠤ౻ɹব 6 ɺ‫࡚ٶ‬ɹ३ 7 ɺࠤ౻ᚸೋ 8 ɺ๺઒ರࢤ 8
3B02 ‫ؠ‬Ԙ‫ܕ‬஠Խమͷϝεό΢ΞʔεϖΫτϧ
(౦ཧେཧ 1 ɺి௨େ 2 ) ˓ࢁా߁༸ 1 ɺࠤ౻ඒึ 1 ɺখྛٛஉ 2
3B03 ‫࣓ڧ‬ੑͱޫ৮ഔͷಛੑΛࣔ͢εζυʔϓࢎԽνλϯͷ 119 Sn ϝεό΢ΞʔεϖΫτϧ
(౦ཧେ 1 ɺதՊӃେ࿈Խ෺‫ ݚ‬2 ) ˓໺ଜ‫و‬ඒ 1 ɺ
A. S. Ganeshraja2 ɺԦɹ‫ ދ܉‬2‫ٳ‬ɹ‫ܜ‬S ձ৔
A ձ৔. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10:10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
঑ྭ৆ड৆ߨԋ࠲௕: ࣰ‫ݪ‬ɹް
3S01 ϥβϗʔδ΢Ϝͷ༹ӷԽֶ‫ڀݚ‬ͷͨΊͷ৽͍͠෼ੳ๏ͷ։ൃ—‫ڞ‬௜๏ͱநग़ฏߧ‫؍‬ଌ๏—(ࡕେӃཧ) ּদྑਸ঑ྭ৆ड৆ߨԋ࠲௕: தౡɹ֮
3S02 ϝεό΢Ξʔ෼ޫύϥϝʔλͱີ౓൚ؔ਺
๏Λ༻͍ͨ d, f ϒϩοΫࡨମͷ݁߹ঢ়ଶ‫ڀݚ‬(೔ຊ‫ڀݚྗࢠݪ‬։ൃ‫ࢠۚ )ߏػ‬੓ࢤ঑ྭ৆ड৆ߨԋ࠲௕: ‫ٱ‬อ‫࠸ݠ‬
3S03 ෛϛϡΦϯΛ༻͍ͨඇഁյࡾ࣍‫ݩݩ‬ૉ෼ੳ๏ͷ։ൃ(ࡕେӃཧ) ೋ‫ٶ‬࿨඙S ձ৔. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11:20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ֶձ৆ड৆ߨԋ࠲௕: ԣࢁ໌඙

3S04 ‫ۃ‬ඍྔ α ์ࣹੑ֩छͷଌఆ๏։ൃ͓Αͼ஍‫ٿ‬Խֶ‫΁ڀݚ‬ͷԠ༻(ۚ୔େֶ໊༪‫ڭ‬त) ࢁຊ੓ّ- 13 -A ձ৔
B ձ৔. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12:15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
์ࣹԽ෼ੳ
෼Պձ

α ์ࣹମɾ‫ࣹ์ڥ؀‬ೳ෼Պձ

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13:20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
‫ࣹ์ڥ؀‬ೳ 2/ͦͷଞ࠲௕: ҆ా݈Ұ࿠
3A04 τϦ΢Ϝͷ౔৕-২෺ؒҠߦ܎਺ͷ໰୊఺ɿ෼ੳํ๏ʹΑΔҧ͍(ྔ‫์ߏػݚ‬ҩ‫ ݚ‬1 ɺ౦‫ژ‬χϡʔΫϦΞ 2 ) ˓ా্‫ ࢠܙ‬1 ɺ಺ా࣎෉ 1 ɺా෦Ҫɹ݈ 2
3A05 ICP-MS/MS ʹΑΔւਫத Np-237 ଌఆͷࢼΈ(ஜ೾େ਺ཧ 1 ɺ޿ౡେӃཧ 2 ɺֶशӃେཧ 3 ɺ
Agilent4 ɺ(ࡒ) ‫ ݚڥ؀‬5 ) ˓ࡔ‫ޱ‬ɹҁ 1 ɺEigl
Rosmarie2 ɺຊଟਅ‫ ل‬1 ɺେ໺ɹ߶ 3 ɺ֯ాਈҰ࿠ 3 ɺࣛ᝷߁ߦ 4 ɺߴ‫ٱ‬༤Ұ 5 ɺࢁ⃻৴࠸ 1 ɺ຤໦‫ܒ‬հ 1
3A06 ετϩϯν΢Ϝ-90 ෼ੳ༻ࣗಈԽγεςϜͷ‫ࢼڥ؀‬ྉ෼ੳ΁ͷద༻(‫ ߏػྗࢠݪ‬1 ɺKEK2 ɺؔ౦ٕ‫ ݚ‬3 ) ˓౻ాത‫ ت‬1 ɺ໺ౡ݈େ 2 ɺӬԬඒՂ 1 ɺେᖒਸਓ 1 ɺখ
໺༸৳ 3
3A07 ӷମγϯνϨʔγϣϯΧ΢ϯλΛ༻͍ͨநग़γϯνϨʔλʹΑΔ 89 Sr ͱ 90 Sr ͷหผଌఆ๏ͷ‫ݕ‬౼(ۚ୔େӃࣗવ 1 ɺۚ୔େֶࡍη 2 ɺۚ୔େཧ޻ 3 )˓ञҪߒষ 1 ɺ্ਿਖ਼थ 2 ɺԣࢁ໌඙ 3ΞΫνϊΠυ/ͦͷଞ࠲௕: ‫ٶ‬ຊϢλΧ
3B04 f ‫ي‬ಓిࢠͷ݁߹ಛੑͱϚΠφʔΞΫνϊΠυ෼཭‫ڍ‬ಈͷ૬ؔ(‫ ߏػྗࢠݪ‬1 ɺ޿ౡେӃཧ 2 ɺ޿ౡେ N-BARD3 )˓ۚࢠ੓ࢤ 1 ɺ౉ᬒխ೭ 1 ɺ‫ٶ‬Լɹ௚ 2 ɺதౡɹ֮ 2,3
3B05 தੑԚછਫ͔Βͷετϩϯν΢Ϝͷબ୒తநग़ʹ͓͚Δநग़ߏ଄(౦๺େۚ‫ࢁ˓ )ݚ‬ଜே༤ɺߴ‫ڮ‬ɹߊɺӬҪຬՈɺന࡚‫࣍ݠ‬
3B06 5 Ձ΢ϥϯؐ‫͚͓ʹݩ‬ΔۚଐίϩΠυͷ৮ഔޮՌ(‫˓ )ߏػྗࢠݪ‬๺௰ষߒɺେ಺࿨‫ر‬ɺԻ෦࣏‫װ‬
3B07 Determination of chemical compositionof nickel-based super alloy by TOF-PGA technique(JAEA1 ɺट౎େֶ౦‫ ژ‬2 ) ˓ԫɹ໌ً 1 ɺ౻ɹெี 1 ɺւ࿝‫ݪ‬ɹॆ 2 ɺ໦ଜɹರ 1 ɺதଜৃ࢘ 1
3B08 Ӄ੓‫ࣸ͞ॻʹظ‬Εͨͱߟ͑ΒΕ͖ͯͨԾ໊‫ݹ‬ච੾ͷ 14 C ೥୅ଌఆʕ఻౻‫ߦݪ‬੒චະৄࢄ
Β͠Վ੾͓Αͼ఻‫ݯ‬ढ़པචຽ෦੾Λྫʹʕ(໊େ ISEE1 ɺதԝେจ 2 ) ˓ খా‫ و׮‬1 ɺ஑ా࿨ਉ 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15:00 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A ձ৔एख༏लൃද৆දজࣜ
ดɹձ- 14 -

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2S01

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Frontline in superheavy element study using a gas-filled recoil ion separator
MORITA, K., MORIMOTO, K., KAJI, D., HABA, H.

- 15 -

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13
 ýķł- ħÅķłã`ĀmÀÅ`òĠÀÅ`ÍØÀÅ`¹ĥÀÅ`ĀmħĽÀÅ`ĀÀÅ`ÀƐÀÅ`ņęÀÅ`õý ÄķłƍĮďč`iÏÀÅ`g³ĽÅƒŻtĢħķ
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GARIS-II ,ƍĮ-ðƆ⛉Ꮫĳ⛉ᏛķłűšƊ19002005(ģëƀķł) Ďį,ƍĮ15K05116(¸İķł C),á+5$&ŝ:90".%[1] P. J. Karol et al., Pure. Appl. Chem. 88, p.155 (2016).
[2] K. Morita, K. Morimoto, D. Kaji et al., JPSJ 73, p.2593(2004).
[3] K. Morita, K. Morimoto, D. Kaji et al., JPSJ 76, p.045001(2007).
[4] K. Morita, K. Morimoto, D. Kaji et al., JPSJ 81, p.103201(2012).
[5] K. Morita, K. Morimoto, D. Kaji et al., JPSJ 78, p.064201(2009).
[6] J. Even et al., Science 345, p.1491 (2014).
[7] K. Morita, K. Morimoto, D. Kaji et al., RIKEN Accel. Prog. Rep. 47, p.xi (2014).
[8] D. Kaji, K. Morimoto, et al., RIKEN Accel. Prog. Rep. 48, p.69 (2015).
[9] D. Kaji, K. Morimoto et al., Nucl. Instr. and Meth. B317, p.311 (2013).

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2S02

Gas Phase Chemistry of Superheavy Elements(GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany)
Alexander Yakushev

Long-lived isotopes of superheavy elements (SHE) with atomic number ZFDQEHSURGXFHG
via fusion reactions between heavy actinide targets and neutron-rich projectiles at a rate of single
atoms per day or per week only. Investigating the neutron-rich SHE nuclei using rapid gas-chemical
separation and subsequent on-line detection provides an independent chemical characterization and analternative separation technique to electromagnetic recoil separators. The highly efficient separation of
Hs in the form of HsO4 is an impressive example for such studies of the nuclear reaction mechanism
DQGQXFOHDUVWUXFWXUH>@$SSURDFKLQJWKHKHDYLHVWHOHPHQWVWKHFRXSOLQJRIFKHPLVWU\VHWXSVWRD
recoil separator promises extremely high sensitivity due to strong suppression of background fromunwanted species. The use of combination of two separation techniques, physical pre-separation andgas phase chemistry opens the possibility for investigating new compound classes of superheavy
HOHPHQWV>@
Electron shells of SHE are influenced by strong relativistic effects caused by the high value of Z.
7KH OLJKWHU WUDQVDFWLQLGHV ZLWK =  - ZHUH H[SHULPHQWDOO\ VKRZQ WR EH PHPEHUV RI JURXSVWKURXJKRIWKH3HULRGLF7DEOHRIWKHHOHPHQWV>@(DUO\DWRPLFFDOFXODWLRQVSUHGLFWHGFRSHrnicium(Cn, elePHQW DQGIOHURYLXP )OHOHPHQW WREHQREOHJDV-like due to the strong relativistic
stabilization of the closed-shell configuration 6d7s in Cn, and the very large spin-orbit splitting in
7p AOs resulting in the quasi-closed-shell configuration 7s7p LQ )O >@ 5HFHQW IXOO\ UHODWLYLVWLF
FDOFXODWLRQVVWXG\LQJ&QDQG)OLQGLIIHUHQWHQYLURQPHQWVVXJJHVWWKRVHWREHOHVVUHDFWLYHFRPSDUHG
WR WKHLU OLJKWHU KRPRORJXHV LQ WKH JURXS EXW VWLOO H[KLELWLQJ PHWDOOLF FKDUDFWHU >@ ([SHULPHQWDO
gas-chromatography studies on Cn have, indeed, revealed a weak metal-metal bond formation with
JROG>@,QFRQWUDVWWRWKLVIRU)OWKHXQH[SHFWHGIRUPDWLRQRIDSK\VLVRUSWLRQERQGXSRQDGVRUSWLRQ
on gold was inferred from first experiments performed by the PSI-)/15FROODERUDWLRQ>@)LJSchematic drawing of the TASCA-COMPACT2 set-up used for the gas chromatographic
investigation of the volatility of Fl and its reactivity towards Au.

- 17 -

7KH VHFRQG VXFFHVVIXO JDV FKURPDWRJUDSK\ VWXG\ RQ )O XSRQ WKH DGVRUSWLRn on gold was
performed after the pre-separation with a gas-ILOOHGVHSDUDWRU7$6&$>@Two COMPACT detectors
ZHUHPRXQWHGGLUHFWO\WRWKHH[LWRI7$6&$ )LJ Two decay chains, one from )ODQGRQH )Owere deposited on gold at room temperature. This result is indicative for the formation of ametal-PHWDO ERQG EHWZHHQ )O DQG JROG DQG WKXV GHPRQVWUDWHV WKH PHWDOOLF FKDUDFWHU RI )O >@
6HYHUDOIXUWKHUVWXGLHVRQ)OFKHPLVWU\ZHUHSHUIRUPHG0RUH)ODWRPVZHUHREVHUYHGLQH[SHULPHQWVat TASCA. The newest data will be presented.
(OHPHQWIRUZhLFKWKHQDPH1LKRQLXPDIWHU-DSDQZDVSURSRVHGWKLV\HDULVWKHQH[WYHU\KRWWRSLFLQWKH6+(FKHPLVWU\)LUVWJDV-SKDVHVWXGLHVRQQLKRQLXPZHUHSHUIRUPHGDWWKH)/15'XEQD
DQGDW*6,'DUPVWDGW1LKRQLum has one unpaired 7p electron, and therefore should be much more
UHDFWLYH FRPSDUHG WR WKH QHLJKERUV &Q DQG )O ZKLFK KDYH FORVHG VKHOOV 7KH UHVXOWV RI WKH UHFHQW
experiment on nihonium chemistry at TASCA will be presented.
The new compound was recentO\ LQYHVWLJDWHG IRU 6J HOHPHQW   6J &2 6 í the firstorgano-metallic compound of superheavy elements. Sg atoms were pre-separated in a gas-filled
VHSDUDWRU*$5,6DQGVWRSSHGLQDJDVPL[WXUHFRQWDLQLQJ&2JDV9RODWLOHFDUERQ\OVZHUHIRUPHGDQG
transported to COMPACT detector. The adsorption behavior of Sg(CO)6 was studied by gas-solid
chromatogUDSK\LQFRPSDULVRQZLWKQHDUHVWKRPRORJVLQWKHJURXS0RDQG:>@
5HIHUHQFHV>@-Dvorak et al., Phys. Rev. Letters 97  >@-'YRUDNHWDO., Phys. Rev. Letters 100  >@Ch E. Düllmann et al., Nucl. Instr. Meth. A 551–  >@Ch.E. Düllmann et al., Radiochim. Acta 97-  >@A. Türler and V. Pershina, Chem. Rev. 113Ѹ  >@K.S. Pitzer, J. Chem. Phys. 63  >@V. Pershina et al., J. Chem. Phys. 131  >@
5(LFKOHU et al., Angew. Chem, Int. Ed. 47-  >@
5(LFKOHU et al., Radiochim. Acta 98-  >@A. Semchenkov et al., NIM B 266-  >@
A. Yakushev et al., Inorg.Chem., 53-  >@-(YHQHWDOInorg.Chem. 51-  >@-(YHQHWDOScience 345  .

- 18 -

2S03

103 ␒ඖ⣲࡛ࡳࡘࡅࡓ࿘ᮇ⾲ࡢ࡯ࡇࢁࡧ㹼 ඖ⣲࿘ᮇ⾲ࡀ᭩ࡁ᥮ࢃࡿ㸽㹼ཎᏊຊᶵᵓ ‫ۑ‬బ⸨ဴஓ

103 ␒ඖ⣲࣮ࣟࣞࣥࢩ࣒࢘(Lr)ࡣࠊ1961 ᖺ࡟ A. Ghiorso ࡽ࡟ࡼࡗ࡚ึࡵ࡚ྜᡂࡉࢀࡓேᕤඖ
⣲࡛࠶ࡾࠊࡶࡕࢁࢇ⮬↛⏺࡟ࡣᏑᅾࡋ࡞࠸ࠋඖ⣲࿘ᮇ⾲࡛ࡣࠊ࢔ࢡࢳࣀ࢖ࢻ⣔ิࡢᮎ➃࡟఩⨨ࡍࡿࠋLr ࡣຍ㏿ჾࢆ⏝࠸ࡓ㔜࢖࢜ࣥ᰾⼥ྜ཯ᛂ࡟ࡼࡗ࡚ྜᡂࡉࢀࠊ⏕ᡂ㔞ࡣᩘ⛊࡟ 1 ಶ⛬ᗘ࡜ᑡ࡞ࡃࠊࡉࡽ࡟⏕ᡂࡋࡓྠ఩యࡣࡍ࡭࡚▷ᑑ࿨࡛࠶ࡿࡓࡵࠊ୍ᗘ࡟ཎᏊ 1 ಶ࡞࠸ࡋᩘಶ
ࡎࡘࡋ࠿ᐇ㦂࡟౪ࡍࡿࡇ࡜ࡀ࡛ࡁ࡞࠸㸦ཎᏊ୍ಶࡢ໬Ꮫ㸧ࠋࡇࡢࡼ࠺࡞ᐇ㦂ࡢ㞴ࡋࡉ࠿ࡽࠊLrࡢ໬Ꮫⓗᛶ㉁ࡣ࡯࡜ࢇ࡝᫂ࡽ࠿࡟࡞ࡗ࡚࠸࡞࠸ࠋ஦ᐇࠊLr ࡀ࢔ࢡࢳࣀ࢖ࢻ⣔ิ᭱ᚋࡢඖ⣲࡜ࡋ࡚᣺⯙࠺࠿࡝࠺࠿ࡍࡽࠊᐇ㦂ⓗ࡟☜࠿ࡵࡽࢀࡓࡇ࡜ࡣ࡞࠿ࡗࡓࠋ
Lr ࡢࡼ࠺࡞ཎᏊ␒ྕࡀ኱ࡁ࡞ඖ⣲࡛ࡣࠊཎᏊ᰾㏆ഐ࡟Ꮡᅾ☜⋡ࢆࡶࡘ s ㌶㐨ࡸ p1/2 ㌶㐨࡞࡝࡟࠶ࡿ㟁ᏊࡀཎᏊ᰾࡟ᙉࡃࡦࡁࡘࡅࡽࢀࡿࡓࡵࠊࡇࢀࡽࡢ㟁Ꮚࡢ㐠ືࡣග㏿࡟㏆ࡃ࡞ࡿࠋࡇࢀ࡟ࡼࡾ㟁Ꮚࡢ㉁㔞ࡀቑ኱ࡋࠊ㌶㐨ࡣࡼࡾ཰⦰ࡍࡿࠋ୍᪉ࠊࡑࡢእഃ࡟࠶ࡿ d ㌶㐨ࡸ f ㌶
㐨࡛ࡣࠊෆഃࡢ㟁Ꮚ㌶㐨ࡢ཰⦰࡟ࡼࡗ࡚ཎᏊ᰾࠿ࡽࡢ㟼㟁ᘬຊࡀࡉࡽ࡟㐽ⶸࡉࢀࡿࡇ࡜࡟࡞
ࡾࠊ㌶㐨ࡀᗈࡀࡿࠋ⤖ᯝ࡜ࡋ࡚ࠊs ㌶㐨ࡸ p1/2 ㌶㐨ࡣࡼࡾᏳᐃ໬ࡋࠊd ㌶㐨ࡸ f ㌶㐨ࡣࡼࡾ୙Ᏻᐃ໬ࡍࡿࠋࡇࡢ⌧㇟ࡣ┦ᑐㄽຠᯝ࡜࿧ࡤࢀࠊࡍ࡭࡚ࡢඖ⣲࡟ෆᅾࡍࡿࠋ┦ᑐㄽຠᯝࡣཎᏊ
␒ྕࡀ኱ࡁࡃ࡞ࡿ࡯࡝ᙉࡃ࡞ࡾࠊ≉࡟㢧ⴭ࡜࡞ࡿ➨ 7 ࿘ᮇ௨㝆ࡢඖ⣲࡛ࡣࠊ࡜ࡁ࡟ࡣ㟁Ꮚ㓄⨨ࡲ࡛ኚ໬ࡍࡿྍ⬟ᛶࡀᣦ᦬ࡉࢀ࡚࠸ࡿࠋ
ඖ⣲࿘ᮇ⾲ࡀ࠶ࡽࢃࡋ࡚࠸ࡿ࿘ᮇᚊࡣࠊඖ⣲ࢆཎᏊ␒ྕ㡰࡟㓄ิࡍࡿ࡜ඖ⣲ࡢ≀⌮ⓗࠊ໬Ꮫⓗᛶ㉁ࡀ୍ᐃࡢ࿘ᮇᛶ࡛ኚ໬ࡍࡿࡇ࡜࡛࠶ࡾࠊࡇࢀࡣఝ㏻ࡗࡓ౯㟁Ꮚ㌶㐨ࡀ࿘ᮇⓗ࡟⌧ࢀࡿࡇ࡜࡟㉳ᅉࡍࡿࠋLr ࡢሙྜࠊࣛࣥࢱࣀ࢖ࢻᮎ➃࡟఩⨨ࡍࡿࣝࢸࢳ࣒࢘(Lu)ࡢ㟁Ꮚ㓄⨨ࡀ
[Xe]6s24f145d1 ࡛࠶ࡿࡇ࡜ࢆ㋃ࡲ࠼ࡿ࡜ࠊࡑࡢ㟁Ꮚ㓄⨨ࡣ[Rn]7s25f146d1 ࡜⪃࠼ࡽࢀࡿࠋࡋ࠿ࡋ
࡞ࡀࡽࠊ┦ᑐㄽຠᯝࢆ⪃៖ࡋࡓཎᏊ㌶㐨ィ⟬ࡢ⤖ᯝࠊLr ཎᏊ࡛ࡣ 6d ㌶㐨ࡼࡾ 7p1/2 ㌶㐨ࡀࡼࡾᏳᐃ໬ࡍࡿࡓࡵࠊ[Rn]7s25f147p1/21 ࡜࡞ࡿࡇ࡜ࡀண᝿ࡉࢀࡓ[1]ࠋඖ⣲ࡢ໬Ꮫⓗᛶ㉁ࡣࠊ᭱እ
Ẇ㟁Ꮚ㌶㐨(౯㟁Ꮚ㌶㐨)࡟ࡼࡗ࡚≉ᚩ࡙ࡅࡽࢀࡿࠋࡍ࡞ࢃࡕࠊࡇࡢ౯㟁Ꮚ㌶㐨ࡢ㐪࠸ࡣࠊLrࡢ໬Ꮫⓗᛶ㉁ࡀ࿘ᮇ⾲࠿ࡽࡢண᝿࡜ࡣ␗࡞ࡿྍ⬟ᛶࡀ࠶ࡿࡇ࡜ࢆព࿡ࡍࡿࠋࡋ࠿ࡋࠊ⌮ㄽⓗண ࠿ࡽ 40 ᖺ௨ୖࡀ⤒ࡗࡓ௒᪥ࡲ࡛ࠊணゝࡉࢀࡓ Lr ࡟࠾ࡅࡿ”࿘ᮇᚊࡢ࡯ࡇࢁࡧ“ࡣࠊࠕཎᏊ୍ಶࡢ໬Ꮫࠖࡢ㞴ࡋࡉࡢࡓࡵ࡟ᐇ㦂ⓗ࡟☜࠿ࡵࡽࢀ࡞࠸ࡲࡲࡔࡗࡓࠋ
ᡃࠎࡣࠊࡇࡢࡼ࠺࡞ Lr ࡢ≉Ṧᛶࢆ᫂ࡽ࠿࡟ࡍࡿࡓࡵࠊ᭱እẆ㟁Ꮚࡢ᮰⦡࢚ࢿࣝࢠ࣮ࢆ┤᥋཯ᫎࡍࡿ≀⌮㔞࡛࠶ࡿ➨୍࢖࢜ࣥ໬࢚ࢿࣝࢠ࣮(IP1)࡟╔┠ࡋࡓࠋIP1 ࡣࠊཎᏊࡢᛶ㉁ࢆ࠶ࡽࢃ
ࡍ᭱ࡶᇶᮏⓗ࡞≀⌮㔞ࡢࡦ࡜ࡘ࡛࠶ࡾࠊࡇࢀࢆᐇ㦂ⓗ࡟ồࡵࡿࡇ࡜ࡀฟ᮶ࢀࡤࠊᑐ㇟࡜ࡍࡿ
ཎᏊࡢ㟁Ꮚ㓄⨨࡟㛵ࡍࡿ᝟ሗࢆᚓࡿࡇ࡜ࡀ࡛ࡁࡿࠋࡋ࠿ࡋ࡞ࡀࡽࠊ୍⯡࡟ᗈࡃ฼⏝ࡉࢀ࡚࠸ࡿඹ㬆࢖࢜ࣥ໬ἲ࡜࠸ࡗࡓᡭἲࡣࠊ
ࠕཎᏊ୍ಶࡢ໬Ꮫࠖⓗྲྀᢅ࠸ࡀせồࡉࢀࡿ Lr ࡟ࡣ㐺⏝࡛ࡁ࡞࠸ࠋࡑࡇ࡛ᡃࠎࡣࠊ㧗 ࡢ㔠ᒓ⾲㠃࡛㉳ࡇࡿ࢖࢜ࣥ໬⌧㇟࡛࠶ࡿ⾲㠃㟁㞳㐣⛬ࢆᛂ⏝ࡋࡓ᪂ࡋ࠸ IP1 Ỵᐃἲࢆ㛤Ⓨࡋࡓࠋ⾲㠃㟁㞳㐣⛬ࡣࠊ㧗 ࡢ㔠ᒓ⾲㠃࡟ཎᏊࢆ᥋ゐࡉࡏࡓ࡜ࡁࠊ⾲㠃࡜ཎᏊࡢ┦஫స⏝࡟ࡼࡗ࡚ࠊཎᏊࡀ࢖࢜ࣥ໬ࡉࢀࡿ⌧㇟ࢆ࠸࠺ࠋ⾲㠃㟁㞳㐣⛬࡟࠾ࡅࡿ࢖࢜ࣥ໬ຠ⋡ࡣࠊ㔠ᒓ⾲㠃ࡢᗘࡸ௙஦㛵ᩘࠊࡑࡋ࡚࢖࢜ࣥ໬ࡉࢀࡿཎᏊࡢ IP1 ࡞࡝࡟౫Ꮡࡍࡿࡇ࡜ࡀ▱ࡽࢀ࡚࠸ࡿࠋᡃࠎ
Discrepancy in the Periodic Table appears at element 103; the Periodic Table of elements might be
restructured
SATO, T. K.

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ࡣࠊࡇࡢ࢖࢜ࣥ໬ຠ⋡ࡢ IP1 ౫Ꮡᛶࢆᛂ⏝ࡋ࡚ࠊLr ࡢ IP1 ࢆึࡵ࡚ᐇ㦂ⓗ࡟Ỵᐃࡋࡓ[2]ࠋ
ᐇ㦂ࡣཎᏊຊᶵᵓࢱࣥࢹ࣒ຍ㏿ჾ᪋タ࡛⾜ࡗࡓࠋࢱࣥࢹ࣒ຍ㏿ჾ࠿ࡽࡢ 63 MeV࣍࢘⣲࢖࢜ࣥࣅ࣮࣒(11B4+)ࢆ࢝ࣜ࣍ࣝࢽ
࣒࢘ᶆⓗ(249Cf)࡬↷ᑕࡍࡿࡇ࡜࡛ Lr ྠ఩య 256Lr(༙ῶᮇ 27 ⛊)ࢆྜᡂࡋࡓࠋྜᡂࡋ
ࡓ 256Lr ࢆࢱࣥࢱࣝࡢ⾲㠃࡛࢖࢜ࣥ໬ࡋࠊ
ࡑࡢ࡜ࡁࡢ࢖࢜ࣥ໬ຠ⋡ࢆ ᐃࡍࡿࡇ࡜
࡛ࠊLr ࡢ IP1 ࢆồࡵࡓࠋᚓࡽࢀࡓ Lr ࡢ IP1 ࡣͶǤͻ͸ା଴Ǥ଴଼ି଴Ǥ଴଻ eV ࡔࡗࡓࠋ࢔ࢡࢳࣀ࢖ࢻࡢ୰࡛᭱ࡶప࠸㸦ᅗ 1㸧ࠋࣛࣥࢱࣀ࢖ࢻ࡛ࡣࠊࢸࣝࣅ࣒࢘(Tb)࠿ࡽ
࢖ࢵࢸࣝࣅ࣒࢘(Yb)ࡲ࡛༢ㄪ࡟ IP1 ࡀቑ ᅗ㸯ཎᏊ␒ྕ࡟ᑐࡍࡿ IP1 ࡢኚ໬ ‫ەی‬ᐇ㦂ຍࡋࠊLu ࡛ᛴ⃭࡟ᑠࡉࡃ࡞ࡿࡇ࡜ࡀ▱ࡽ್‫ۑ‬᥎ᐃ್‫۔‬㸸⌮ㄽィ⟬್ ࢀ࡚࠸ࡿࠋࡇࡢ༢ㄪ࡞ቑຍࡣࠊ4f ㌶㐨࡟
9 ಶࡢ㟁Ꮚࢆࡶࡘ Tb ࠿ࡽཎᏊ␒ྕࡀ㐍ࡴ࡟ࡘࢀࠊ
ࡦ࡜ࡘࡎࡘ 4f ㌶㐨࡟㟁Ꮚࡀ඘ሸࡉࢀ࡚࠸ࡁࠊ
2
Yb ࡛‽㛢Ẇᵓ㐀 [Xe]6s 4f14 ࢆ࡜ࡿࡇ࡜࡟㉳ᅉࡍࡿࠋLu ࡣࡇࡢ‽㛢Ẇᵓ㐀࡟ࡉࡽ࡟ࡶ࠺ࡦ࡜
ࡘࡢ౯㟁Ꮚࡀ㏣ຍࡉࢀࡓ㟁Ꮚᵓ㐀ࢆᣢࡘࡓࡵ࡟ࠊప࠸ IP1 ࢆࡶࡘࠋࡼࡗ࡚ࠊLr ࡀ㠀ᖖ࡟ᑠࡉ࠸ IP1 ࢆࡶࡘࡇ࡜ࡣࠊLr ཎᏊࡀ Lu ࡜ྠᵝ࡟ࡺࡿࡃ᮰⦡ࡉࢀࡓ㟁Ꮚࢆࡶࡘ࡜ゎ㔘࡛ࡁࡿࠋࡍ࡞
ࢃࡕࠊᮏᡂᯝ࡟࠾࠸࡚ࠊࣛࣥࢱࣀ࢖ࢻ࡟࠾ࡅࡿ Lu ࡢࡼ࠺࡟ࠊLr ࡛࢔ࢡࢳࣀ࢖ࢻࡀ⤊ࢃࡿࡇ࡜ࢆึࡵ࡚ᐇ㦂ⓗ࡟♧ࡍࡇ࡜ࡀ࡛ࡁࡓࠋ
ࡉࡽ࡟ᡃࠎࡣᮏ◊✲ࡢ୰࡛ࠊ┦ᑐㄽຠᯝࢆ⪃៖ࡋࡓཎᏊ㌶㐨ィ⟬ࢆ࠾ࡇ࡞࠸ࠊLr ࡢ IP1 ࡢ⌮ㄽ್ࢆồࡵࡓࠋ㟁Ꮚ㓄⨨[Rn]7s25f147p1/21 ࡟ᇶ࡙࠸࡚ᚓࡽࢀࡓ⌮ㄽ್ࡣ 4.963 ± 0.015 eV ࡛࠶ࡾࠊᮏ◊✲࡛ᚓࡽࢀࡓᐇ㦂್࡜㠀ᖖ࡟ࡼࡃ୍⮴ࡍࡿࠋࡇࡢࡇ࡜ࡣࠊLr ཎᏊࡢ᭱እẆ㟁Ꮚ㌶㐨
ࡀ 7p1/2 ࡛࠶ࡾࠊLr ࡀ࿘ᮇ⾲࠿ࡽࡢண᝿࡜ࡣ␗࡞ࡿ㟁Ꮚ㓄⨨ࢆࡶࡘࡇ࡜ࢆᙉࡃ♧၀ࡍࡿࠋp ㌶
㐨࡟ࡦ࡜ࡘࡢ౯㟁Ꮚࢆࡶࡘ㟁Ꮚ㓄⨨ࡣࠊp ࣈࣟࢵࢡඖ⣲࡛࠶ࡿ࢖ࣥࢪ࣒࢘ࡸࢱ࣒ࣜ࢘ࡀᒓࡍ
ࡿ 13 ᪘࡜㢮ఝࡍࡿࠋIUPAC ࡟ࡼࢀࡤࠊ㑄⛣㔠ᒓࡣࠕཎᏊࡀ᏶඲࡟‶ࡓࡉࢀ࡚࠸࡞࠸ d ㌶㐨ࢆᣢࡘࠊ࠶ࡿ࠸ࡣ d ㌶㐨࡟ࡼࡗ࡚㝧࢖࢜ࣥ࡜࡞ࡿࡇ࡜ࡀ࡛ࡁࡿࠖ࡜ᐃ⩏ࡉࢀ࡚࠸ࡿࠋࡇࡢᐃ⩏࡟ᚑ࠼ࡤࠊLr ࡣ㑄⛣㔠ᒓ࡛ࡣ࡞ࡃࠊ඾ᆺඖ⣲࡜࠸࠺ࡇ࡜࡟࡞ࡿࠋ
ࡇࡢࡼ࠺࡟ࠊLr ࡢ࿘ᮇ⾲ࡢ఩⨨࡟㛵ࡍࡿ㆟ㄽࡣࠊཎᏊ␒ྕࡀ 100 ࢆ㉸࠼ࡿ㉸㔜ඖ⣲㡿ᇦ࡟࠾࠸࡚ࠊ࿘ᮇ⾲ࢆ࡝࠺ᤊ࠼࡚࠸ࡃ࠿ࢆ⪃࠼ࡿ➃⥴࡜࡞ࡿࠋ࠿ࡡ࡚ࡼࡾ Lu ࡜ Lr ࡢ࿘ᮇ⾲ࡢ఩⨨࡟ࡘ࠸࡚ࠊࣛࣥࢱࣀ࢖ࢻ࠾ࡼࡧ࢔ࢡࢳࣀ࢖ࢻ࡜ࡣ༊ูࡋࠊࢫ࢝ࣥࢪ࣒࢘(Sc)࠾ࡼࡧ࢖ࢵࢺࣜ
࣒࢘(Y)࡜࡜ࡶ࡟ 3 ᪘ඖ⣲࡜ࡍ࡭ࡁ࡜࠸࠺ᣦ᦬ࡀ࡞ࡉࢀ࡚࠸ࡿࠋᮏᡂᯝࡀࡁࡗ࠿ࡅ࡜࡞ࡗ࡚ࠊIUPAC(ᅜ㝿⣧ṇ࣭ᛂ⏝໬Ꮫ㐃ྜ)ࡣ Lu ࡜ Lr ࡢ࿘ᮇ⾲ୖࡢ఩⨨࡟ࡘ࠸᳨࡚ウࢆ㛤ጞࡋࡓࠋࡍ࡛
࡟ࢱࢫࢡࢢ࣮ࣝࣉࡀ❧ࡕୖࡆࡽࢀ࡚࠾ࡾࠊ㆟ㄽࢆ㐍ࡵ࡚࠸ࡿ[3]ࠋ
[1] J. ̽P. Desclaux & B. Fricke, J. Phys., 41. 943 - 946 (1980).
[2] T. K. Sato et al., Nature, 520, 209-211 (2015).
[3] E. Scherri, Chem. International, March-April 22-23 (2016).

- 20 -



3S01ࣛࢨ࣮࣍ࢪ࣒࢘ࡢ⁐ᾮ໬Ꮫ◊✲ࡢࡓࡵࡢ᪂ࡋ࠸ศᯒἲࡢ㛤Ⓨ㸫ඹỿἲ࡜ᢳฟᖹ⾮ほἲ㸫㜰኱㝔⌮ ‫➟ۑ‬ᯇⰋᓫ䛆ࡣࡌࡵ࡟䛇㻌 ⌧ᅾࡢඖ⣲࿘ᮇ⾲ࡢ᭱ୗẁࠊ➨ 7 ࿘ᮇ࡟ᒓࡍࡿཎᏊ␒ྕࡢ㠀ᖖ࡟኱ࡁ࡞ඖ⣲ࡢ୰࡛ࡶࠊ≉࡟ཎᏊ␒ྕ 104 ␒௨㝆ࡢ㉸࢔ࢡࢳࣀ࢖ࢻඖ⣲㸦㉸㔜ඖ⣲㸧ࡢ໬Ꮫⓗᛶ㉁࡟ࡣ኱ࡁ࡞
⯆࿡ࡀᣢࡓࢀࠊ◊✲ࡉࢀ࡚࠸ࡿࠋ┦ᑐㄽຠᯝࡀ኱ࡁࡃ࡞ࡿ㔜ඖ⣲㡿ᇦ࡟࠾࠸࡚ࠊ㑄⛣㔠ᒓ࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿ㉸㔜ඖ⣲ࡢ໬Ꮫⓗᛶ㉁࡜ࡑࡢྠ᪘ඖ⣲࡜ࡢ㢮ఝᛶࢆㄪ࡭ࡿࡇ࡜ࡣ⯆࿡῝࠸ࠋ୍᪉࡛ࠊࡇࢀࡽ㉸㔜ඖ⣲ࡣࠊ㔜࢖࢜ࣥ᰾⼥ྜ཯ᛂ࡟ࡼࡗ࡚ప࠸⏕ᡂ⋡࡛ࡋ࠿⏕ᡂ࡛ࡁࡎࠊ༙
ῶᮇࡶ▷࠸ࡓࡵࠊ༢୍ཎᏊ≧ែ࡛ࡢ໬Ꮫᐇ㦂ࢆᐇ᪋ࡋ࡞ࡅࢀࡤ࡞ࡽࡎࠊ㠀ᖖ࡟㞴ࡋ࠸ࠋࡉࡽ
࡟ࠊ᳨ฟἲࡣȘ⥺ ᐃ࡟࡯ࡰ㝈ᐃࡉࢀࠊࡑࡢࡓࡵࡢヨᩱㄪ〇ࡶ▷᫬㛫࡛ᐇ᪋ࡍࡿᚲせࡀ࠶ࡿࠋࡲࡓࠊ᰾཯ᛂ⏕ᡂ≀ࢆᖖ࡟㎿㏿࡟໬Ꮫᐊ࡟ᦙ㏦ࡋ⥆ࡅࡿຍ㏿ჾ࢜ࣥࣛ࢖ࣥᦙ㏦⿦⨨ࠊࡇࢀ࡜㐃⤖࡛ࡁࠊఱⓒᅇ௨ୖࡶྠࡌ໬Ꮫ᧯సࢆ⾜࠺ࡓࡵࡢ໬Ꮫศᯒ⿦⨨ࠊȘ⥺ ᐃ⿦⨨ࡀᚲせ࡛࠶ࡿࠋࡑࡢࡓࡵࠊ㉸㔜ඖ⣲ࡢ໬Ꮫⓗᛶ㉁ࡢከࡃࡣࡲࡔㄪ࡭ࡽࢀ࡚࠸࡞࠸ࠋ ᮏ◊✲࡛ࡣࠊ104 ␒ඖ⣲ Rf ࢆᑐ㇟࡜ࡋࡓ᪂ࡋ࠸໬Ꮫศᯒᡭἲ࡜ࡋ࡚ࠊඹỿᐇ㦂ἲ࡜ᢳฟᖹ
⾮฿㐩ほ ἲࢆ㛤Ⓨࡍࡿࡇ࡜ࡀ࡛ࡁࡓࠋ
䛆ඹỿἲ䛇㻌 ࡇࢀࡲ࡛ࡢ㉸㔜ඖ⣲ࡢ⁐ᾮ໬Ꮫ࡜ࡋ࡚ࡣࠊ୺࡟࢖࢜ࣥ஺᥮ἲ࡟࡚ヲ⣽࡞◊✲ࡀᐇ᪋ࡉࢀ࡚ࡁࡓࠋᮏ◊✲࡛ࡣࠊỿẊᣲື࡟╔┠ࡋࠊࡑࡢᛶ㉁ࢆㄪ࡭ࡿࡓࡵࡢᡭἲࠊ⿦⨨㛤Ⓨࢆᐇ᪋ࡋࡓࠋ༢୍ཎᏊ≧ែ࡛ࡣࠊඹỿᣲືࢆほ ࡍࡿࡋ࠿᪉ἲࡀ࡞ࡃࠊỿẊ≧ែ࡛ࡢȘ⥺ ᐃࡢ㞴ࡋࡉࡶㄢ㢟࡛࠶ࡗࡓࠋᮏ◊✲࡛ࡣࠊ㧗ศゎ⬟࡛ࡢȘ⥺ ᐃ࡟ᡂຌࡋ࡚࠸ࡓࢧ࣐࣒ࣜ࢘ඹỿ
ἲࡢ㉸㔜ඖ⣲࡬ࡢ㐺⏝ࢆヨࡳࡓࠋ࣐ࣝࢳࢺ࣮ࣞࢧ࣮ࢆ⏝࠸࡚ࠊᵝࠎ࡞✀㢮ࡢඖ⣲ࡢඹỿᣲື
ࢆㄪ࡭ࠊᐇ㝿ࡢỿẊᣲືࡸ㘒ᙧᡂࡢᵝᏊࢆࡇࡢ᪉ἲ࡛ㄪ࡭ࡿࡇ࡜ࡀ࡛ࡁࡿࡇ࡜ࢆ☜ㄆࡋࠊࡉࡽ࡟ Rf ࡢྠ᪘ඖ⣲ࡢ ZrࠊHfࠊTh ࡢᣲືࢆࡼࡾヲ⣽࡟ㄪ࡭࡚ Rf ᐇ㦂࡟㐺ษ࡞ᐇ㦂᮲௳ࢆỴᐃࡋࡓࠋࡲࡓࠊຍ㏿ჾ࢜ࣥࣛ࢖ࣥᐇ㦂ࢆᐇ᪋ࡍࡿࡓࡵࡢ⁐ᾮ໬⿦⨨ࠊ྾ᘬࢁ㐣⿦⨨ࢆ㛤Ⓨࡋࠊຍ㏿ჾ࢜ࣥࣛ࢖ࣥࡢࢸࢫࢺᐇ㦂ࢆᐇ᪋ࡋࠊRf ࡢඹỿᐇ㦂ᡭἲ࡜ࡋ࡚☜❧ࡍࡿࡇ࡜ࡀ࡛ࡁࡓࠋ
䛆ᖹ⾮฿㐩ほ ἲ䛇㻌 ༙ῶᮇࡀ⣙ 1 ศࡸࡑࢀ௨ୗ࡜࡞ࡿ㉸㔜ඖ⣲ࡢ໬Ꮫᐇ㦂࡜ࡋ࡚ࡣࠊ㠀ᖖ࡟㎿㏿࡞໬Ꮫศ㞳ࡀ㐺⏝ࡉࢀ࡚ࡁࡓࠋࡋ࠿ࡋࠊࡑࡢࡓࡵࠊ໬Ꮫ཯ᛂࡀ༑ศ࡟㏿ࡃ࡞࠸཯ᛂ⣔࡛ࡣᐃ㔞ⓗ࡞㆟ㄽࡀ㞴ࡋ࠸㠃ࡀ࠶ࡗࡓࠋࡲࡓࠊ㉸㔜ඖ⣲࡟ᑐࡋ࡚࢖࢜ࣥ஺᥮ࡸᢳฟᣲືࡢᖹ⾮฿㐩ࢆ☜ㄆࡋࡓ౛ࡶ࡞࠿ࡗࡓࠋᮏ◊✲࡛ࡣࠊຍ㏿ჾ࢜ࣥࣛ࢖ࣥࡢ≧ែ࡛ࣂࢵࢳἲ࡟࡚ᢳฟᣲື
ࡢ᫬㛫౫Ꮡᛶࢆほ ࡍࡿ᪉ἲࢆ☜❧ࡋࠊᐃ㔞ⓗ࡞㆟ㄽࡢ࡛ࡁࡿศ㓄ಀᩘࢆྲྀᚓࡍࡿࡇ࡜ࢆ┠ⓗ࡜ࡋ࡚ࠊ⿦⨨㛤Ⓨ࡜ᇶ♏ᐇ㦂ࢆ⾜ࡗࡓࠋ⁐ᾮ໬⿦⨨ࡢୗὶ࡟ᶞ⬡ࡢධࡗࡓ໬Ꮫ཯ᛂᐜჾࢆタ⨨ࡋࠊ᣺࡜࠺ᚋࠊ✵Ẽᅽ࡟ࡼࡗ࡚ᐜჾෆ࠿ࡽ⁐ᾮࡢࡳࢆ᤼ฟࡋࠊ⵨Ⓨ஝ᅛᚋ࡟Ș⥺ ᐃࢆ⮬ື࡛ᐇ᪋࡛ࡁࡿࡼ࠺࡟⿦⨨ࢆ㛤Ⓨࡋࡓࠋࡑࡢ⿦⨨ࢆᐇ㝿࡟ຍ㏿ჾ࢜ࣥࣛ࢖ࣥࡢ≧ែ࡛౑⏝
ࡋࠊZr ࡜ Hf ࢆ⏝࠸ࡓᐇ㦂ࢆᐇ᪋ࡋࡓࠋ⤖ᯝ࡜ࡋ࡚ࠊࣂࢵࢳἲ࡛ᚓࡓศ㓄ಀᩘ࡜ྠᵝࡢศ㓄ಀᩘࢆᚓࡿࡇ࡜ࡀ࡛ࡁࠊᐇ㦂ᡭἲ࡜ࡋ࡚☜❧ࡍࡿࡇ࡜ࡀ࡛ࡁࡓࠋࡲࡓࠊᐇ㝿ࡢᢳฟᣲືࡢ᫬
㛫౫Ꮡᛶࡢほ ࠿ࡽࠊRf ࡢᐇ㦂࡟㐺⏝࡛ࡁࡿ༑ศ࡟㏿࠸཯ᛂ⣔ࢆ᥈ࡋฟࡍࡇ࡜ࡀ࡛ࡁࡓࠋ
䛆ㅰ㎡䛇㻌 ᮏ◊✲ࡣࠊ኱㜰኱Ꮫ⠛ཎཌඛ⏕ࠊ⌮໬Ꮫ◊✲ᡤ⩚ሙᏹගඛ⏕ࠊ᪥ᮏཎᏊຊ◊✲㛤ⓎᶵᵓỌ┠ㅍ୍㑻ඛ⏕ࠊ஑ᕞ኱Ꮫ᳃⏣ᾈ௓ඛ⏕ࢆࡣࡌࡵ࡜ࡍࡿㅖඛ⏕᪉ࡢࡈᣦᑟࠊࡈ㠴᧡ࠊ୪ࡧ࡟ᮌ㔝ឡᏊࡉࢇࠊᶓ໭༟ஓࡃࢇࠊ㇏ᮧᜨᝅࡃࢇࢆࡣࡌࡵ࡜ࡍࡿᏛ⏕ࡢ᪉ࠎࡢ༠ຊࡢୗ࡟
ᐇ᪋ࡉࢀࡓࡶࡢ࡛ࡍࠋࡇࡇ࡟ᚰࡼࡾឤㅰ⏦ࡋୖࡆࡲࡍࠋ
Developments of the chemical experiment methods for rutherfordium: coprecipitation and observationof equilibrium in extraction reactions
KASAMATSU, Y.

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3S02࣓ࢫࣂ࢘࢔࣮ศගࣃ࣓࣮ࣛࢱ࡜ᐦᗘỗ㛵ᩘἲࢆ⏝࠸ࡓ
GI ࣈࣟࢵࢡ㘒యࡢ⤖ྜ≧ែ◊✲᪥ᮏཎᏊຊ◊✲㛤Ⓨᶵᵓ ‫ۑ‬㔠Ꮚ ᨻᚿ࠙⥴ゝࠚ ࣓ࢫࣂ࢘࢔࣮ศගࡣࠊ╔┠ࡍࡿඖ⣲ࡢ໬ྜ≀࡟࠾ࡅࡿཎᏊ౯≧ែࢆヲ⣽࡟グ㏙ࡍࡿࠋ࣓ࢫ
ࣂ࢘࢔࣮ศගࣃ࣓࣮ࣛࢱࡢ୍ࡘ࡛࠶ࡿ࣓ࢫࣂ࢘࢔࣮␗ᛶయࢩࣇࢺ(δ)ࡣࠊ╔┠ࡍࡿඖ⣲ࡢ㓟໬ᩘࡸࢫࣆࣥ≧ែ࡟ࡼࡗ࡚ኚ໬ࡍࡿࠋ౛࠼ࡤࠊ57Fe ࡢ δ ್ࢆ ᐃࡍࡿࡇ࡜࡟ࡼࡾࠊ㕲໬ྜ≀ࡢࢫࣆࣥ㌿⛣ᣲື࡛࠶ࡿࢫࣆࣥࢡࣟࢫ࣮࢜ࣂ࣮(SCO)⌧㇟ࢆほ ࡍࡿࡇ࡜ࡀ࡛ࡁࠊSCO ࡀ㉳ࡇࡿ࠿ྰ࠿ࢆุ᩿ࡍࡿࡇ࡜ࡀ࡛ࡁࡿࠋࡉࡽ࡟ࠊδ ್ࡣཎᏊ᰾఩⨨࡛ࡢ㟁Ꮚᐦᗘ(ρ0)࡟ẚ౛ࡍࡿࡢ࡛ࠊཎᏊ౯㌶㐨ࡀ s 㟁Ꮚ࡟୚࠼ࡿ㐽ⶸࡢ⛬ᗘࢆᐃ㔞໬࡛ࡁࡿࠋᅄ౯ࡢࢿࣉࢶࢽ࣒࢘㘒యࡢ
δ(237Np)್ࡣ໬ྜ≀࡟ࡼࡗ࡚␗࡞ࡾࠊNp-㓄఩Ꮚ㛫ࡢඹ᭷⤖ྜࡢ኱ࡁࡉࢆẚ㍑ࡍࡿࡇ࡜ࡀ࡛ࡁࡿࠋ ᮏ◊✲ࡢ┠ⓗࡣࠊ࣓ࢫࣂ࢘࢔࣮ศගࣃ࣓࣮ࣛࢱࢆ⏝࠸࡚ィ⟬໬Ꮫⓗᡭἲ࡛࠶ࡿᐦᗘỗ㛵ᩘἲࢆ᭱㐺໬ࡋࠊࡑࡢィ⟬ᡭἲࢆ⏝࠸࡚╔┠ࡍࡿ⌧㇟ࢆࣔࢹࣝ໬ࡍࡿࡇ࡜࡛࠶ࡿࠋᮏ◊✲ࡣࠊ኱ࡁࡃศࡅ࡚஧ࡘࡢࢸ࣮࣐ (i) 㕲஧౯㞟✚ᆺ㘒యࡢ SCO-on/off ࢫ࢖ࢵࢳࣥࢢᣲືࠊ(ii) ࣛࣥࢱࣀ࢖ࢻ࣭࢔ࢡࢳࣀ࢖ࢻ㘒యࡢ⤖ྜ≧ែ◊✲ ࠿ࡽ࡞ࡿࠋ
࠙㕲஧౯㞟✚ᆺ㘒యࡢ 6&2RQRII ࢫ࢖ࢵࢳࣥࢢᣲື ࠚ ཎᏊ౯࡟ d6 㟁Ꮚࢆᣢࡘ㕲஧౯࢖࢜ࣥࡣࠊṇඵ㠃యሙ࡟࠾࠸࡚㧗ࢫࣆࣥ(HS)࡜పࢫࣆࣥ(LS)ࢆྲྀࡾ࠺ࡿࠋHS(S = 2)-LS(S = 0)㛫ࡢࢫࣆࣥ㌿⛣ᣲື࡛࠶ࡿ SCO ⌧㇟ࡢⓎ⌧ཎᅉࢆ⌮ゎࡍࡿࡇ࡜ࡣࠊศᏊࢫ࢖ࢵࢳࣥࢢࢹࣂ࢖ࢫࡢࢹࢨ࢖ࣥ࡬࡜ࡘ࡞ࡀࡿࠋࡋ࠿ࡋ࡞ࡀࡽࠊSCO Ⓨ⌧࣓࢝ࢽࢬ࣒࡟ᑐࡍࡿ⌮ㄽⓗ◊✲ࡣከࡃ࡞࠸ࠋ[Fe(NCS)2(pyridine)4]ࢆࣘࢽࢵࢺ࡜ࡍࡿ㞟✚ᆺ㘒య࡛ࡣࠊࢤࢫࢺ྾⬺╔ࡸ㞟✚ᵓ㐀࡟ࡼࡾ⇕ㄏ㉳ SCO ࡀ㉳ࡇࡿ࠿ྰ࠿ࡀኚ໬ࡍࡿࠋSCO ࡀ㉳ࡇࡿሙྜ(SCO-on)ࠊప ࡟࠾࠸࡚ LSࠊ㧗 ࡟࠾࠸࡚ HS ࡜࡞ࡾࠊSCO ࡀ㉳ࡇࡽ࡞࠸ሙྜ(SCO-off)ࠊ
ᗘ࡟ࡼࡽࡎ HS ࡛࠶ࡿࠋࡋࡓࡀࡗ࡚ࠊప ࡟࠾࠸࡚࡝ࡢࢫࣆࣥ≧ែࡀᏳᐃ࠿ࢆぢ✚ࡶࡿࡇ࡜࡛ SCO-on/off ࢆண ࡛ࡁࡿࠋ 㕲஧౯㘒యࡢᗄఱᏛࡣࠊ᪤ሗࡢ༢⤖ᬗᵓ㐀ࢆཧ↷ࡋࠊ11 ಶࡢ SCO-on 㘒యࠊ7 ಶࡢ
SCO-off 㘒యࢆᑐ㇟࡜ࡋࡓࠋ༢᰾ࣘࢽࢵࢺ࡛
࠶ ࡿ [Fe(NCS)2(pyridine)4] ࢆ ࣔ ࢹ ࣝ 㘒 య ࡜ࡋࠊHS ࡜ LS ࡢ୧᮲௳࡟࠾࠸࡚࢚ࢿࣝࢠ࣮
ィ⟬ࢆ⾜ࡗࡓࠋ
⏝࠸ࡿィ⟬ᡭἲࡀ SCO-on/offᣲືࢆ෌⌧ྍ⬟࠿☜࠿ࡵࡿࡓࡵ࡟ࠊᐦᗘỗ㛵ᩘ࡟ྵࡲࢀࡿ Hartree-Fock ஺᥮࢚ࢿࣝࢠ
࣮ࡢ๭ྜࢆ 0 ࠿ࡽ 25 %ࡲ࡛ኚ໬ࡉࡏࡓࠋࡑ
ࡢ⤖ᯝࠊ10 %ࡢ Hartree-Fock ஺᥮㡯ࢆྵࡴ
Fig. 1 [Fe(NCS)2(pyridine)4]ࡢ࣏ࢸࣥࢩࣕࣝ᭤㠃⌮ㄽࡀ SCO-on/off ᣲືࢆࡼࡃ෌⌧ࡋࡓࠋࡇࡢ⌮ㄽࢆ⏝࠸࡚ࠊLS ࡜ HS ࡢ࣏ࢸࣥࢩࣕࣝ

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࢚ࢿࣝࢠ࣮᭤㠃ࢆ Fe-N ㊥㞳࡜ Fe-pyridine ࡢ஧㠃ゅ࡟ᑐࡋ࡚୕ḟඖⓗ࡟ᥥ࠸ࡓ(Fig. 1)ࠋࡑࡢ
⤖ᯝࠊFe-pyridine ஧㠃ゅࡢኚ໬࡟కࡗ࡚ࠊSCO-on/off ᣲືࡀࢫ࢖ࢵࢳࡍࡿࡇ࡜ࢆ᫂ࡽ࠿࡟ࡋ
ࡓࠋ࠙ࣛࣥࢱࣀ࢖ࢻ࣭࢔ࢡࢳࣀ࢖ࢻ㘒యࡢ⤖ྜ≧ែ◊✲ ࠚ 㧗ࣞ࣋ࣝᨺᑕᛶᗫᲠ≀ࡢศ㞳ኚ᥮ᢏ⾡ࡢ㛤Ⓨ࡟࠾࠸࡚ࠊ࣐࢖ࢼ࣮࢔ࢡࢳࣀ࢖ࢻ(MA)࡜ࣛࣥ
ࢱࣀ࢖ࢻ(Ln)ࡢศ㞳࣓࢝ࢽࢬ࣒ࢆ᫂ࡽ࠿࡟ࡍࡿࡇ࡜ࡣ㔜せ࡞ㄢ㢟࡛࠶ࡿࠋ⁐፹ᢳฟ࡟ࡼࡿศ
㞳ᐇ㦂࡟࠾࠸࡚ࠊMA/Ln ศ㞳ᣲືࡣ⏝࠸ࡿࢻࢼ࣮ࡢᛶ㉁࡟౫Ꮡࡍࡿࡇ࡜ࡀ♧၀ࡉࢀࡓࡓࡵࠊ
MA ࠾ࡼࡧ Ln ࡜⤖ྜ≧ែ࡟ᑐࡍࡿ⌮ㄽⓗ◊✲ࡀồࡵࡽࢀ࡚ࡁࡓࠋࡋ࠿ࡋ࡞ࡀࡽࠊf ࣈࣟࢵࢡ໬ྜ≀ࡢ⤖ྜᛶ࡟ᑐࡍࡿᐦᗘỗ㛵ᩘἲࡢጇᙜᛶࡣࠊ༑ศ࡟㆟ㄽࡉࢀ࡚࠸࡞࠸ࠋࡑࡇ࡛ࠊ151Eu
࡜ 237Np ࡢ࣓ࢫࣂ࢘࢔࣮␗ᛶయࢩࣇࢺ್ࢆ⏝࠸࡚ィ⟬ᡭἲࡢ࣋ࣥࢳ࣐࣮ࢡ◊✲ࢆ⾜࠸ࠊMA ࡛
࠶ࡿ Am, Ln ࡛࠶ࡿ Eu 㘒యࡢ⤖ྜ≧ែࢆㄪ࡭ࡓࠋ δ ್ࡣ ρ0 ್࡟ẚ౛ࡍࡿࡢ࡛ࠊᐇ㦂್ࡢ δ ್࡜ィ⟬್ࡢ ρ0 ࢆࣉࣟࢵࢺࡋࠊ୍ḟࡢ⥺ᙧᛶࢆẚ
㍑ࡍࡿࡇ࡜࡛ィ⟬ᡭἲࡢጇᙜᛶࢆホ౯࡛ࡁࡿࠋEu, Np ࡑࢀࡒࢀ 10 㘒యࢆ࣋ࣥࢳ࣐࣮ࢡࢭࢵࢺ
࡜ࡋ࡚ࠊᵝࠎ࡞ Hartree-Fock ஺᥮๭ྜࢆྵࡴỗ㛵ᩘ࡛ẚ㍑ࡋࡓࠋࡑࡢ⤖ᯝࠊ⣙ 50 %ࡢ HartreeFock ஺᥮㡯ࢆᣢࡘ⌮ㄽࡢ ρ0 ್ࡀ δ(151Eu),ࡍ࡞ࢃࡕ Eu, Np 㘒δ(237Np)್࡜Ⰻࡃ┦㛵ࡋࠊయࡢ⤖ྜ≧ែࢆ෌⌧ࡋࡓࠋࡇࡢ⌮ㄽࢆ⏝࠸࡚ ࠊ Eu ࡜ Am ࡢ ࢪ ࢳ ࢜ ࣍ ࢫ ࣇ ࢕ ࣥ 㓟(R2PS2H)㘒యࡢ⤖ྜ≧ែࢆㄪ࡭ࡓࠋࡑࡢ⤖ᯝࠊf ㌶㐨࡜◲㯤ࡢ㟁Ꮚⓗ࡞㔜࡞ࡾࡀ Eu ࡜
Am ࡛␗࡞ࡾࠊ4f(Eu)࡜ S ࡣ㔜࡞ࡾࢆᣢࡓ࡞
࠸ࡢ࡟ᑐࡋࠊ5f(Am)࡜ S ࡣ⤖ྜⓗ࡞㔜࡞ࡾ
M=Eu
M=Am
ࢆ♧ࡋࡓ(Fig. 2)ࠋf ㌶㐨㟁Ꮚࡢ⤖ྜ࡬ࡢᐤ୚
ࡢ㐪࠸ࡀࠊAm/Eu ศ㞳ᣲື࡟㉳ᅉࡍࡿࡇ࡜
Fig. 2 [M(Me2PS2)3]ࡢ f ㌶㐨⏤᮶ࡢศᏊ㌶㐨
ࢆ♧၀ࡋࡓࠋ
࠙ࡲ࡜ࡵࠚ ᐦᗘỗ㛵ᩘἲࢆ⏝࠸ࡓ d, f ࣈࣟࢵࢡ㘒యࡢ⤖ྜ≧ែ◊✲࡟ࡘ࠸࡚㏙࡭ࡓࠋヲ⣽࡞ィ⟬ᡭἲࡸゎᯒ᪉ἲࡣ஧ࡘࡢࢸ࣮࣐࡟ࡼࡗ࡚␗࡞ࡿࠋࡋ࠿ࡋ࡞ࡀࡽࠊ࣓ࢫࣂ࢘࢔࣮ศගࣃ࣓࣮ࣛࢱࢆ
⏝࠸࡚ᐦᗘỗ㛵ᩘィ⟬ࡢጇᙜᛶࢆホ౯ࡍࡿࡇ࡜ࡀࠊࡑࢀࡒࢀࡢ⌧㇟࡟ᑐࡍࡿࡼࡾⰋ࠸⌮ゎ࡟⧅ࡀࡿࡇ࡜ࢆ♧၀ࡋࡓࠋ࠙ཧ⪃ᩥ⊩ࠚ
[1] M. Kaneko, S. Tokinobu, S. Nakashima, Chem. Lett., 2013, 42, 1432-1434.
[2] M. Kaneko, S. Nakashima, Bull. Chem. Soc. Jpn., 2015, 88, 1164-1170.
[3] M. Kaneko, S. Miyashita, S. Nakashima, Dalton Trans., 2015, 44, 8080-8088.
[4] M. Kaneko, S. Miyashita, S. Nakashima, Inorg. Chem., 2015, 54, 7103-7109.
[5] M. Kaneko, S. Miyashita, S. Nakashima, Croat. Chem. Acta, 2016, 88, 347-353.

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3S03㈇࣑ࣗ࢜ࣥࢆ⏝࠸ࡓ㠀◚ቯ୕ḟඖඖ⣲ศᯒἲࡢ㛤Ⓨ㜰኱㝔⌮ ‫ۑ‬஧ᐑ࿴ᙪ㈇࣑ࣗ࢜ࣥࡣ㟁Ꮚ࡜ྠࡌ㟁Ⲵࢆᣢࡕࠊ㟁Ꮚࡢ 200 ಸࡢ㉁㔞ࢆᣢࡘ⣲⢏Ꮚ࡛࠶ࡿࠋ㈇࣑ࣗ࢜
ࣥࡀ≀㉁୰࡛೵Ṇࡍࡿ࡜ࠊ࣑ࣗ࢜ࣥཎᏊ࡜࿧ࡤࢀࡿ㟁Ꮚࡢ୍ࡘࡀ㈇࣑ࣗ࢜ࣥ࡟⨨ࡁ᥮ࢃࡗࡓ
ཎᏊ⣔ࢆᙧᡂࡍࡿࠋ࣑ࣗ࢜ࣥཎᏊ࠿ࡽࡣ㈇࣑ࣗ࢜ࣥࡢ⬺ບ㉳࡟క࠸ࠊ㏻ᖖࡢ≉ᛶ X ⥺ࡢ 200ಸࡢ࢚ࢿࣝࢠ࣮ࢆᣢࡘࠊ࣑ࣗ࢜ࣥ≉ᛶ X ⥺ࡀᨺฟࡉࢀࡿࠋᡃࠎࡣࠊࡇࡢ࣑ࣗ࢜ࣥ≉ᛶ X ⥺ࢆ฼⏝ࡋࡓ᪂ࡋ࠸ࢱ࢖ࣉࡢඖ⣲ศᯒἲࡢ㛤Ⓨ࡟ࡇࢀࡲ࡛ྲྀࡾ⤌ࢇ࡛ࡁࡓࠋ
࣑ࣗ࢜ࣥ≉ᛶ X ⥺ࡣ㠀ᖖ࡟㧗࢚ࢿࣝࢠ࣮࡛࠶ࡿࡇ࡜࠿ࡽࠊ≀㉁ෆ㒊ࢆᐜ᫆࡟㏱㐣ࡋ⾲㠃࡟㝈ࡽ࡞࠸ศᯒࡀྍ⬟࡛࠶ࡿࠋࡲࡓ㈇࣑ࣗ࢜ࣥࡢධᑕ࢚ࢿࣝࢠ࣮ࢆ㑅ᢥࡍࡿࡇ࡜࡟ࡼࡾࠊ≀㉁୰࡛ࡢ೵Ṇ఩⨨ࠊࡍ࡞ࢃࡕ࣑ࣗ࢜ࣥ≉ᛶ X ⥺ࡢⓎ⏕఩⨨ࢆไᚚࡍࡿࡇ࡜ࡀ࡛ࡁࡿࠋࡉࡽ࡟ඖ
⣲࡟ࡼࡗ࡚࣑ࣗ࢜ࣥཎᏊࡢᙧᡂ☜⋡ࠊࡍ࡞ࢃࡕศᯒ࡟࠾ࡅࡿឤᗘࡣ࡯࡜ࢇ࡝ኚ໬ࡋ࡞࠸ࡇ࡜
ࡀ▱ࡽࢀ࡚࠾ࡾࠊከඖ⣲ྠ᫬ศᯒࡀྍ⬟࡛࠶ࡿࠋࡇࡢࡼ࠺࡟㈇࣑ࣗ࢜ࣥ࡟ࡼࡿඖ⣲ศᯒࡣࠊ㠀◚ቯ࡛ࠊ୕ḟඖⓗ࡟ࠊࡉࡽ࡟ከඖ⣲ྠ᫬ࡢᐃ㔞ศᯒࡀ࡛ࡁࡿ࡜࠸࠺ࠊ௚ࡢᡭἲ࡟ࡣ࡞࠸ࡍ
ࡄࢀࡓ≉ᚩࢆᣢࡗ࡚࠸ࡿࠋ㈇࣑ࣗ࢜ࣥ࡟ࡼࡿඖ⣲ศᯒࡢྍ⬟ᛶࡣࠊ40 ᖺ௨ୖ๓࡟ᣦ᦬ࡉࢀ࡚
࠸ࡓࡀ[1]ࠊࡇࢀࡲ࡛ࡣᐃᛶⓗ࡞ศᯒࡢ◊✲ࡀ࠸ࡃࡘ࠿▱ࡽࢀ࡚࠸ࡿࡢࡳ࡛࠶ࡗࡓࠋᡃࠎࡢ◊✲ ࢢ ࣝ ࣮ ࣉ ࡣ ࠊ ㏆ ᖺ ฼ ⏝ ྍ ⬟ ࡜ ࡞ ࡗ ࡓ ኱ ᙉ ᗘ ࡢ ࣑ ࣗ ࢜ ࣥ ※ 㸦 J-PARC, RIKEN-RAL,
RCNP-MuSIC㸧ࢆ⏝࠸࡚ࠊ㈇࣑ࣗ࢜ࣥ࡟ࡼࡾ఩⨨㑅ᢥⓗ࡞ᐃ㔞ศᯒ࡟ึࡵ࡚ᡂຌࡋࠊ᪂ࡓ࡞
ඖ⣲ศᯒἲ࡜ࡋ࡚☜❧ࡋࡓ[2-4]ࠋ
ᡃࠎࡀᐇ㝿࡟㈇࣑ࣗ࢜ࣥ࡟ࡼࡿศᯒࢆ⾜ࡗࡓ⤖ᯝࡢ୍౛࡜ࡋ࡚ࠊᅗ㸯࡟Ụᡞᮇࡢኳಖᑠุࡢ㔠ࡢྵ᭷⋡ࡢ῝ᗘศᕸࢆ♧ࡍࠋỤᡞᮇࡢᑠุࡣࠊࡑ
ࡢ≉ู࡞〇ἲ࠿ࡽ⾲㠃㏆ഐ࡛㔠ࡢྵ᭷⋡ࡀ㧗࠸ᒙࢆసࡗ࡚࠸ࡿࡇ࡜ࡀ▱ࡽࢀ࡚࠸ࡿࠋ㈇࣑ࣗ࢜ࣥ
࡟ࡼࡿศᯒ࡛ࡶ⾲㠃ᩘ࣐࢖ࢡ࣓࣮ࣟࢺࣝࡢ㡿ᇦ࡟㔠ࡢྵ᭷⋡ࡀ㠀ᖖ࡟㧗࠸ᒙࡀ࠶ࡿࡇ࡜ࢆ᫂☜࡟☜ㄆ࡛ࡁࡓࠋࡲࡓࡇࡢศᯒ⤖ᯝࡣࠊ◚ቯศᯒ࡟ࡼࡾ▱ࡽࢀ࡚࠸ࡓᑠุࡢ㔠ࡢྵ᭷⋡ࡢ῝ᗘศᕸ࡟ࡶ᏶඲࡟୍⮴ࡋ࡚࠸ࡿࡇ࡜ࡀࢃ࠿ࡗࡓ[4]ࠋ
㈇࣑ࣗ࢜ࣥࢆ⏝࠸ࡓศᯒἲࡣࠊ㠀◚ቯ࡛ࣂࣝࢡ
࡞≀㉁ࡢෆ㒊ࢆࠊ఩⨨㑅ᢥⓗ࡟ᐃ㔞ⓗ࡟ศᯒࡍࡿ
ᅗ㸯㸸࣑ࣗ࢜ࣥ≉ᛶ X ⥺ ᐃ࡟ࡼࡿᑠ
ࡇ࡜ࡀ࡛ࡁࡿ၏୍ࡢ᪉ἲ࡛࠶ࡿࠋຍ㏿ჾࡢ฼⏝ࡀุࡢඖ⣲ศᯒ⤖ᯝ[4]ᚲせ࡜࠸࠺ไ⣙ࡀ࠶ࡿࡶࡢࡢࠊ௒ᚋ㈗㔜ヨᩱ➼࡬ࡢศᯒ࡟ᛂ⏝ࡉࢀ࡚࠸ࡃࡇ࡜ࢆᮇᚅࡋࡓ࠸ࠋ
࠙ཧ⪃ᩥ⊩ࠚ
[1] H. Daniel, Nuclear-Medizin 4 (1969) 311[2] K. Ninomiya et.al., Bull. Chem. Soc. Jpn., 85 (2012) 228[3] K. Ninomiya et.al., JPS Conf. Proc., 8 (2015) 033005[4] K. Ninomiya et.al., Anal. Chem., 87 (2015) 4597

Development of nondestructive, position-selective and multi-elemental analysis method with negative
muons
NINOMIYA, K.

- 24 -

6

ᴟᚤ㔞Dᨺᑕᛶ᰾✀ࡢ ᐃἲ㛤Ⓨ࠾ࡼࡧᆅ⌫໬Ꮫ◊✲࡬ࡢᛂ⏝㔠ἑ኱Ꮫྡ㄃ᩍᤵ  ᒣᮏᨻ൤ ࡣࡌࡵ࡟
ᆅ⌫⾲ᒙ࡟ࡣࠊࡉࡲࡊࡲ࡞ኳ↛࠾ࡼࡧேᕤᨺᑕᛶ᰾✀ࡀᏑᅾࡋ࡚࠸ࡿࠋ≉࡟ࠊ୰㛗༙ῶᮇ
ࡢD⥺ᨺᑕయࡣࠊᨺᑕ⥺㜵ㆤࡢほⅬ࠿ࡽࡢࡳ࡞ࡽࡎࠊᆅ⌫࣭⎔ቃ໬Ꮫ◊✲ࡢࢶ࣮ࣝ࡜ࡋ࡚ࡶ㔜
せどࡉࢀ࡚࠸ࡿࠋࡇࢀࡽ᰾✀ࡢ≉ᛶࢆ⇍▱ࡋࠊά⏝ࡍࡿࡓࡵ࡟ࡣࠊᚤ㔞ࡢᨺᑕ⬟ ᐃࡀᚲ㡲࡛࠶ࡿࠋṇ☜࡛⢭ᐦ࡞ ᐃ࣭ᐃ㔞࡟ࡣࠊ⎔ቃヨᩱࡸ⏕≀ヨᩱࡢ࣐ࢺࣜࢡࢫ୰࠿ࡽᴟࡵ࡚ᚤ㔞࡞┠ⓗ᰾✀ࢆ⃰⦰࣭⢭〇ࡍࡿศᯒᢏ⾡࡜ࠊ࠿ࡘጉᐖ᰾✀ࡢᙳ㡪ࢆཷࡅ࡞࠸పࣞ࣋ࣝ ᐃᢏ⾡ࡀᚲせ࡜࡞ࡿࠋ➹⪅ࡣ㛗ᖺࠊձᨺᑕᛶ᰾✀࣭ᨺᑕ⥺ࡢ⢭ᐦ ᐃࡢศᯒἲࡢ㛤Ⓨࠊղ⎔ቃᨺᑕ⬟࣭ᨺᑕ⥺ᙳ㡪◊✲㸪ճᨺᑕᛶ᰾✀ࢆࣉ࣮ࣟࣈ࡜ࡍࡿᆅ⌫࣭⎔ቃ໬Ꮫ◊✲࡟ᦠࢃࡗ࡚ࡁࡓࠋ
 ᮏㅮ₇࡛ࡣࠊ᭱ࡶຊࢆὀ࠸࡛ࡁࡓᴟᚤ㔞Dᨺᑕᛶ᰾✀㸪≉࡟㉸࢘ࣛࣥඖ⣲ㅖ᰾✀ࠊࡢศᯒ࣭
ᐃἲࡢ㛤Ⓨࠊ⎔ቃᨺᑕ⬟◊✲ࠊᆅ⌫࣭⎔ቃ໬Ꮫ◊✲࡬ࡢᛂ⏝◊✲ࡢ୺࡞ᡂᯝࢆ⤂௓ࡉࡏ࡚࠸ࡓࡔࡃࠋ ᨺᑕᛶ᰾✀㸪≉࡟Ș⥺ᨺฟ᰾✀ࡢศᯒ࣭ ᐃἲࡢ㛤Ⓨ➹⪅ࡣࠊ㐺ษ࡞ࢺ࣮ࣞࢧࡢ㑅ᐃࠊ㧗ᗘ࡞໬Ꮫศ㞳ᢏ⾡ཬࡧD⥺ࢫ࣌ࢡࢺ࣓ࣟࢺࣜ㸦ཪࡣ
ICP-MS㸧ࢆ⤌ࡳྜࢃࡏࡿࡇ࡜࡟ࡼࡾࠊᙜ᫬ᅔ㞴࡛࠶ࡗࡓ⎔ቃཬࡧ⏕యヨᩱ୰ࡢࡈࡃᚤ㔞࡞ᨺᑕᛶ᰾✀ࢆ㧗࠸⢭ᗘ࡛ᐃ㔞ࡍࡿࡇ࡜ࢆྍ⬟࡜ࡋࠊࡑࢀࡽ᰾✀ࡢ⃰ᗘศᕸࠊᣲືゎ᫂ཬࡧ⿕ࡤࡃ⥺㔞ホ౯◊✲ࢆᗈࡃᒎ㛤ࡋࡓࠋศᯒ⾜⛬ࡀ㠀ᖖ࡟↹㞧࡛࠶ࡗࡓ㞴⁐ᛶ Pu 㓟໬≀࡟ࡘ࠸࡚ࡣࠊ
◲㓟Ỉ⣲࢔ࣥࣔࢽ࣒࢘⁐⼥ἲࢆ⏝࠸ࡿࡇ࡜࡟ࡼࡾ㎿㏿ศᯒࢆྍ⬟࡜ࡋࡓࠋࡲࡓ᪂つ࡞⁐፹ᢳฟ๣ '%'(&03ࠊ'%'(&3 ࢆ⏝࠸ࡓᙉ㓟ᛶୗ࡛ࡢ3Xࠊ$P ᢳฟศ㞳ࢆ☜❧ࡋࡓࠋࡉࡽ࡟ࠊᙜ᫬ TIMS௨እ࡛ࡣ ᐃฟ᮶࡞࠿ࡗࡓ 240Pu/239Pu ྠ఩యẚࢆ Lx/D⥺ ᐃ࡟ࡼࡾྍ⬟࡜ࡋࡓ㸦ᑠᮧඛ⏕࡜ඹྠ㸧ࠋ⎔ቃ୰࡛ᴟࡵ࡚ప⃰ᗘ࡛ ᐃᅔ㞴࡛࠶ࡗࡓ 237Np ࡟ࡘ࠸࡚ࠊ239Np㸦243Am ࡢᏊᏞ᰾✀㸧
235(ཪࡣ Np)ࢆࢺ࣮ࣞࢧ࡜ࡋ࡚ከ㔞ヨᩱ㸦ᅵተ 50-100 g㸧࠿ࡽ Np ࢆᨺᑕ໬Ꮫⓗ࡟ศ㞳࣭⢭〇
ࡋࠊD⥺ࢫ࣌ࢡࢺ࣓ࣟࢺࣜ࡟ࡼࡾ㧗⢭ᗘ࡛ᐃ㔞ࡍࡿᡭἲࡢ㛤Ⓨ࡟ᡂຌࡋࡓࠋᙜ᫬ࠊⱥᅜࡢࢭࣛ
ࣇ࢕࣮ࣝࢻ᰾⇞ᩱ෌ฎ⌮᪋タ࿘㎶ࡢởᰁᆅᖏࢆ㝖ࡁࠊ⎔ቃ࡟࠾ࡅࡿ 237Np ࢹ࣮ࢱࡣⓙ↓࡛࠶ࡗࡓࡀࠊ࠸ࡕ᪩ࡃ⎔ቃ୰ࡢ 237Np ⃰ᗘศᕸࡸ 237Np/239,240Pu ᨺᑕ⬟ẚࢆ᫂ࡽ࠿࡟ࡍࡿࡇ࡜ࡀฟ᮶
ࡓࠋࡲࡓࠊᨺᑕ໬Ꮫⓗ⣧ᗘࡸD⥺࢚ࢿࣝࢠ࣮ࢆ⪃៖ࡋࡓୖ࡛ࢺ࣮ࣞࢧࢆ㑅ᐃࡋࠊNp ศᯒἲ࡜Pu ཬࡧ Am㸦Cm㸧ศᯒἲࢆ⤌ࡳྜࢃࡏࠊྠ୍ヨᩱ࠿ࡽࡢᴟᚤ㔞 NpࠊPuࠊAm (Cm) ㏲ḟศᯒἲࡶ☜❧ࡋࡓࠋࡉࡽ࡟ࠊ㏻ᖖJ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺ࡛ࣜࡣࣂࢵࢡࢢࣛ࢘ࣥࢻ㸦BG㸧ࡀ㧗ࡃࠊᴟప⃰ᗘࡢ Ra ྠ఩య ᐃࡣᅔ㞴࡛࠶ࡗࡓࡓࡵࠊD⥺ࢫ࣌ࢡࢺ࣓ࣟࢺࣜ࡟ࡼࡾ⎔ቃཬࡧ⏕యヨᩱ୰ࡢᴟప⃰ᗘࡢ Ra ྠ఩య ᐃἲࢆ㛤Ⓨࡋࡓࠋࡇࡢ ᐃἲ࡛ࡣࠊᅇ཰⋡ࣔࢽࢱ࡜ࡋ࡚ 225Ra㸦ȕቯኚࠊ229Th ࡢᏊᏞ᰾✀㸧ࢆ⏝࠸ࠊᨺᑕ໬Ꮫศ㞳࣭⢭〇ᚋࠊⓑ㔠ᯈ࡟㟁╔ࡋࡓ 225Ra ࠿ࡽᡂ㛗ࡍࡿᏊᏞ᰾✀ࡀᨺฟࡍࡿD⥺ࢆ⏝࠸࡚ᅇ཰⋡ࢆ ᐃࡍࡿࡇ࡜࡛ࠊᴟࡵ࡚ప࠸⃰ᗘࡢ Ra ྠ఩య(223Raࠊ224Raࠊ 226Raࠊ228RaЍ228Th)ࢆᐃ㔞ࡍࡿ࡜࠸࠺⏬ᮇⓗ࡞ ᐃἲࢆ☜❧ࡍࡿࡇ࡜࡟ᡂຌࡋ
ࡓࠋࡇࡢᡭἲࡣࠊKAMEOKANDE-ϩỈᵴෆࡢỈ୰ Ra ⃰ᗘపῶ໬࡟ಀࡿᇶ♏ࢹ࣮ࢱࡢ཰㞟࡟⏝࠸ࡽࢀࡓࠋࡲࡓࠊᩘࢢ࣒ࣛࡢே㦵ཬࡧṑヨᩱ࡟ࡶ㐺⏝ࡋࠊ⥺㔞ホ౯◊✲࡟ࡶ㈉⊩ࡋࡓࠋ ㉸࢘ࣛࣥඖ⣲ㅖ᰾✀ࡢ⎔ቃᨺᑕ⬟◊✲⎔ቃ࡟࠾ࡅࡿᴟࡵ࡚ప࠸ࣞ࣋ࣝࡢ㉸࢘ࣛࣥඖ⣲ㅖ᰾✀࡟ᑐࡍࡿ㏲ḟᐃ㔞ἲࡢ㛤Ⓨ࡟ࡼࡾࠊglobal fallout ࡢ 237Np ࢆࡣࡌࡵ࡜ࡍࡿ㉸࢘ࣛࣥඖ⣲ࡢ㝣ᇦ࡟࠾ࡅࡿ᰾✀⤌ᡂࠊ⛣⾜ᣲື࡜ࡑࡢ
⤒ᖺኚືࢆ᫂ࡽ࠿࡟ࡍࡿࡇ࡜࡛ࠊࡑࡢᚋྠ఩యᣦᶆศᯒࡢ࢚ࣥࢻ࣓ࣥࣂ࣮࡜ࡋ࡚౑⏝ࡉࢀࡿ࡟⮳ࡗࡓ㉸࢘ࣛࣥඖ⣲ởᰁࡢ BG ࢹ࣮ࢱࢆୡ⏺࡟♧ࡋࠊୡ⏺ࡢởᰁᆅᖏ࡟ᒎ㛤ࡋࡓࠋⱥᅜࡢ
ࢭࣛࣇ࢕࣮ࣝࢻ᰾⇞ᩱ෌ฎ⌮ᕤሙ࠿ࡽࡢᗫᾮࡀᨺฟࡉࢀ࡚࠸ࡓ࢔࢖ࣜࢵࢩࣗᾏࡢἢᓊࡸἙཱྀ
ᇦ࡟࠾࠸࡚ࠊᗈᇦⓗ࡟ሁ✚≀୰ࡢ NpࠊPuࠊAmࠊCm ཬࡧ Tc㸦Cs㸧⃰ᗘࡸྠ఩య⤌ᡂࢆṇ☜࡟ホ౯ࡋࠊᕤሙ࠿ࡽࡢᨺฟ㔞ࡢ᥎ᐃࠊ₻㛫ᖏ࡛ࡢᣲືࡢᕪ␗ࠊ᰾✀ࡢ᫆ືᛶ㸦Tc㸼Cs>Np>AmҸPu㸧࡞࡝ࠊ
ἢᓊᇦ࡛ࡢᨺᑕᛶ᰾✀ࡢ⛣⾜ᣲືࢆ᫂ࡽ࠿࡟ࡋࡓࠋేࡏ࡚ࠊAm ࡟ࡘ࠸࡚ࡣ 242mAm
ࡢᏑᅾࡶ᫂ࡽ࠿࡟ࡋࡓࠋ㝣Ỉ⎔ቃ࡟࠾࠸࡚ࡶỶỈ†ཬࡧῐỈ† (୕᪉†ࡸ⍇⍈†)࡛ࡢ◊✲ࢆ㐍ࡵࠊỈ㉁ኚ໬࡜ 137Cs ࡶྵࡵࡓ㉸࢘ࣛࣥඖ⣲ࡢỿ㝆࣭ሁ✚ᣲື࡬ࡢᙳ㡪ࢆホ౯ࡋࠊᆅ⌫໬Ꮫ- 25 -

◊✲࡬Ⓨᒎࡉࡏࡓࠋࡉࡽ࡟ࠊࢳ࢙ࣝࣀࣈ࢖ࣜࡸ⚟ᓥ➨୍ཎⓎ஦ᨾࠊᗈᓥ࣭㛗ᓮཎ⇿㸦㯮࠸㞵ࡶྵࡵ࡚㸧
ࠊJCO ⮫⏺஦ᨾࠊᪧࢯ㐃ࢭ࣑ࣃࣛࢳࣥࢫࢡ᰾ᐇ㦂ሙ➼ࡢୡ⏺ࡢ᰾ởᰁᆅᇦ࡛ࡢᖜᗈ
࠸◊✲ࢆ⾜࠸ࠊ࣭࢘ࣛࣥ㉸࢘ࣛࣥ᰾✀ࡢྠ఩యᣦ⣠ศᯒ㸦Isotopic fingerprint analysis㸧࡟ࡼࡿởᰁ※㆑ูἲ࡟ࡼࡾࡑࡢᆅᇦࡢ᰾ởᰁࡸ⿕ࡤࡃ⥺㔞ホ౯࡟㈉⊩ࡋࡓࠋ≉࡟ࠊ➨஬⚟❳୸࡟㝆ୗࡋࡓࠕṚࡢ⅊ࠖࡢศᯒ࠿ࡽࠊ60Coࠊ137Csࠊ234,235,238Uࠊ238,239,240,241Pu ཬࡧ 241Am ࢆᑡ㔞ࡢヨᩱ࡛ṇ☜࡟ᐃ㔞ࡍࡿ࡜࡜ࡶ࡟ࠊ237U ࡢᏊᏞ᰾✀࡛࠶ࡿ 237Np ࢆึࡵ࡚ṇ☜࡟ᐃ㔞ࡍࡿࡇ࡜࡟ᡂຌ
ࡋࡓ㸦Health Physics ㄅ࡟ Research topic ࡜ࡋ࡚ᥖ㍕㸧ࠋࡲࡓࠊ㉸࢘ࣛࣥඖ⣲࡟ࡼࡿởᰁࡸ㛗ᮇ⿕ࡤࡃ⥺㔞ホ౯◊✲࡟࠾࠸࡚ࡣࠊ1994ࠥ2013 ᖺ㛫ẖᖺ࢝ࢨࣇࢫࢱࣥඹ࿴ᅜࡢࢭ࣑ࣃࣛࢳࣥࢫ
ࢡ᰾ᐇ㦂ሙཬࡧ࿘㎶㞟ⴠ࡟ฟྥࡁࠊởᰁホ౯ཬࡧ⿕ࡤࡃ⥺㔞ホ౯ࡢࡳ࡞ࡽࡎᢏ⾡ᥦ౪ࡶ⾜ࡗ࡚ࡁࡓࠋࡇࡢࡇ࡜ࡀホ౯ࡉࢀࠊ2003 ᖺ࡟ࡣ࢝ࢨࣇࢫࢱࣥඹ࿴ᅜ㸦බ⾗⾨⏕࣭ᩍ⫱࣭ࢫ࣏࣮ࢶ
┬㸧࠿ࡽࠕ࢝ࢨࣇࢫࢱࣥඹ࿴ᅜࡢ࡬ࡢಖ೺ࢩࢫࢸ࣒࡬ࡢ㈉⊩ࠖ࡜ࡋ࡚≉ู㈹ࢆཷ㈹ࡋࡓࠋ
 ᨺᑕᛶྠ఩యࢆ฼⏝ࡋࡓᆅ⌫࣭⎔ቃ໬Ꮫ◊✲ୖグࡢᴟᚤ㔞ᨺᑕ⬟ ᐃࡢ㛤Ⓨࡸྠ఩యศᕸ࣭⤌ᡂ࡟㛵ࡍࡿᖜᗈ࠸⤒㦂࡜᝟ሗࢆά
࠿ࡋࠊᆅ⌫࣭⎔ቃ໬Ꮫศ㔝࡬ࡢᛂ⏝◊✲ࡶ⾜ࡗ࡚ࡁࡓࠋ኱㝣࠿ࡽࡢởᰁ≀㉁ࡢ㉺ቃ㍺㏦◊✲࡛ࡣࠊ୍ࣨ᭶ࡈ࡜ࡢ㝆ୗ≀㸦᫬࡟ࡣ኱Ẽ࢚࢔ࣟࢰࣝࡶྵࡵ࡚㸧ࢆᤕ㞟ࠊࡑࢀࡽࡢ  3E  %Hศᯒࢆᖺࡲ࡛஧༑ᩘᖺ࡟ࢃࡓࡾ⾜࠺ࡇ࡜࡛ࠊ≀㉁㍺㏦ࡸ㝖ཤ࣓࢝ࢽࢬ࣒ࠊ
ేࡏ࡚࢚ࣝࢽ࣮ࢽࣙ⌧㇟ࡸࣛࢽ࣮ࢽࣕ⌧㇟ࡢ㛗ᮇⓗ࡞ࢧ࢖ࢡࣝ࡜ࡶኚືࡀ୍⮴ࡋ࡚࠸ࡿࡇ࡜ࢆྲྀࡾࡲ࡜ࡵࡓࠋࡇࡢᡂᯝࡣ㛗ᮇࢹ࣮ࢱࢭࢵࢺࡢ㔜せᛶࡶවࡡഛ࠼ࡓ㔜せ࡞ㄽ
ᩥ࡜ࡋ࡚J. Environ. Radioactivityࡢ㧗ᘬ⏝ㄽᩥ࡜ࡋ࡚ࡶ࣐࣮ࢡࡉࢀࡓࠋຍ࠼࡚ࠊU࣭Th
ཬࡧࡑࡢ⣔ิ᰾✀ࢆ⏝࠸ࡓᨺᑕᖺ௦ ᐃࠊᆅୗỈࡢU࡟㛵ࢃࡿD཯㊴⌧㇟࡟㛵ಀࡍࡿ◊✲ࠊ 210 Pb-210 Po୪ࡧ࡟ 22 Na➼ࡢ⎔ቃ࡟Ꮡᅾࡍࡿᴟᚤ㔞ࡢᨺᑕᛶ᰾✀ࢆ౑⏝ࡋࡓᾏỈ㸪㝣Ỉᚠ⎔◊✲ࡸྂẼೃ㸦ࣟࢩ࢔ࡢࣂ࢖࢝ࣝ†ࡸࣔࣥࢦࣝࡢࣇࣈࢫࢢࣝ†ࡢሁ✚≀ࢆᑐ㇟㸧࡟㛵ࡍࡿ◊✲➼ࢆ⢭ຊⓗ࡟㐍ࡵ࡚ࡁࡓࠋࡲࡓࠊ236 UࢆAMS㸦࣮࢜ࢫࢺࣜ࢔࣭࢘࢖࣮ࣥ኱
ᏛVERA㸧࡛ ᐃࡋࠊࢢ࣮ࣟࣂࣝࣇ࢛࣮ࣝ࢔࢘ࢺ㝆ୗ㔞㸦⣙1000 kg㸧ࢆጞࡵ࡚ホ౯ࡋࡓᚋࡣࠊᗈᓥཎ⇿࡬ࡢᛂ⏝ࠊࡉࡽ࡟ᙜヱ᰾✀ࡢ໬Ꮫⓗ≉ᛶ࡟╔┠ࡋࠊᾏὒ῝ᒙỈࡢᚠ⎔ࢺ࣮ࣞࢧ࡜ࡋ࡚฼⏝࡛ࡁࡿྍ⬟ᛶࢆᥦၐࡋࡓࠋࡇࢀࡣࠊ⌧ᅾ฼⏝ࡉࢀ࡚࠸ࡿ 137 Cs࡟௦ࡿ᪂ࡓ࡞ᾏὒᚠ⎔ࢺ࣮ࣞࢧ࡜ࡋ࡚ࡢࣈࣞ࢖ࢡࢫ࣮ࣝ࡜࡞ࡾࠊᾏὒ໬Ꮫศ㔝࡛㔜せ࡞ࢺ࣮ࣞࢧ᰾✀࡜ࡋ࡚㸪⌧ᅾ฼⏝ࡀᗈࡀࡾࡘࡘ࠶ࡿࠋ 㖔ἨỈ୰ࡢRaྠ఩య◊✲࡛ࡣࠊ኱῝ᗘ㸦1000 m⣭㸧Na-Clᆺࡢ㧗ሷศ ἨỈࡢRaྠ఩య࡟╔┠ࡋࠊἢᓊᆅᇦࡸሁ✚┅ᆅ࡛㧗  5Dྵ᭷㔞 㸼%TNJ ࡢ ἨᏑᅾࡢᬑ㐢ᛶࢆ᫂ࡽ࠿࡟ࡋࡓࠋేࡏ࡚ࠊ Ἠ࣮࣎ࣜࣥࢢࢥ࢔ࡢ8ࠊ7Kࠊ5Dྠ఩యࡶ ᐃࡋࠊ㧗5Dྵ᭷ Ἠࡢᡂᅉࡀࠊ῝ᒙࡢ㛫㝽࡟ྵࡲࢀࡿ
໬▼ᾏỈ࠶ࡿ࠸ࡣ῝㒊⢓ᅵ㖔≀ᒙ㛫ࡼࡾ⬺Ỉࡋࡓὶయ࡟⏤᮶ࡍࡿ㧗ሷศᆅୗỈ 5Dࡀ
ಖᏑᛶ࡛࠶ࡿࡇ࡜ࢆᐇ㦂࡛☜ㄆ ࡜୺࡜ࡋ࡚‪ฟ⤒㊰ࡢᒾ▼⾲ᒙ㸦ࢥ࣮ࢸ࢕ࣥࢢ┦㸧ࡢࢺ࣒ࣜ࢘ 7K ࠿ࡽࡢD཯㊴࡟⏤᮶ࡍࡿྍ⬟ᛶࡀ㧗࠸ࡇ࡜ࢆ♧ࡋ㸪ᙉᨺᑕ⬟Ἠᡂᅉࡢ୍➃ࢆ᫂ࡽ࠿࡟ࡋࡓࠋ
ㅰ㎡㸸ࡇࡢᗘࠊ᪥ᮏᨺᑕ໬Ꮫ఍ࡢᏛ఍㈹ࢆᡝࡁࠊ┿࡟ᮃእࡢᰤ㄃࡛ࡍࠋࡇࡢᤵ㈹ࡣࠊ
ஸࡁᜠᖌ࡛࠶ࡿ㔠ἑ኱Ꮫྡ㄃ᩍᤵ࣭㜰ୖṇಙࠊᑠᮧ࿴ஂ୧ඛ⏕࡜ࡢᖾ㐠࡞㑍㏪࡜ࡈᣦ
ᑟࠊࡉࡽ࡟㔠ἑ኱Ꮫ࣭పࣞ࣋ࣝᨺᑕ⬟ᐇ㦂᪋タ㸦//5/㸧㛵ಀ⪅ࡢⓙᵝࡢດຊࡀ⤖㞟ࡋࡓ◊✲ᡂᯝࡢ㈷≀࡛࠶ࡾࠊ⮳ୖࡢ႐ࡧ࡛ࡍࠋ௒᪥࡟⮳ࡿࡲ࡛ࠊ኱ኚከࡃࡢ◊✲⪅࠿ࡽࡈᨭ᥼࣭ࡈᣦᑟࢆᡝࡁᚰࡼࡾឤㅰ⮴ࡋࡲࡍࠋ≉࡟ࠊ//5/ࡢୖ㔝 㤾ᩍᤵࠊ㔠ἑ኱Ꮫࡢᨺᑕ໬Ꮫㅮᗙࡢᆏᮏ ᾈࠊ୰す Ꮥྡ㄃ᩍᤵ࡟ࡣᏛ⏕᫬௦࠿ࡽ㛗࠸ᮇ㛫࡟ࢃࡓࡗ࡚ࡈ
ᣦᑟࠊ㈗㔜࡞ຓゝ࡜ᨭ᥼ࢆ㡬ࡁࡲࡋࡓࠋࡲࡓࠊࡇࡢ㈹ࡣࠊྠ᫬࡟ከࡃࡢඹྠ◊✲ࢆᨭ࠼࡚ୗࡉࡗࡓㅖඛ⏕㸪◊✲⪅ࡢ᪉ࠎࠊඛ㍮ࡸࡍࡤࡽࡋ࠸Ꮫ⏕ࡢࡈᨭ᥼࡟ࡼࡿࡶࡢ࡛࠶
ࡾࠊ◊✲ࡢࡇ࡜ࡸே⏕ࡢࡇ࡜ࢆㄒࡾྜ࠺᫬㛫ࢆඹ᭷ࡍࡿࡇ࡜ࡀ࡛ࡁࡲࡋࡓࠋࡇࢀࡲ࡛
ࡢ඲࡚ࡢ㛵ಀ⪅࡟ᚰ࠿ࡽឤㅰ⮴ࡋࡲࡍࠋ
Development of measurement techniques for low-level alpha-emitting radionuclides and theirapplications to geochemical sciences
YAMAMOTO Masayoshi- 26 -

௡᨝ᰈᖵ ።  ጆῢໆΰ
$‫ܙ‬$ῴ$ ౕ༄
%‫ܙ‬%ῴ% ౕ༄


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1A01

ᨺᑕᛶࢭࢩ࣒࢘ࡢἙᕝ࠿ࡽᾏỈ࡬ࡢ⛣⾜࡟క࠺ᠱ⃮⢏Ꮚ࠿ࡽࡢ⁐⬺࡟㛵ࡍࡿ GAM ࣔࢹࣝ࠿ࡽࡢ⪃ᐹᮾ኱㝔⌮ࠊ ୰ᅜ⛉Ꮫ㝔ࠊ ⟃Ἴ኱ࠊ ᮾ኱ 5,&ࠊ ᮾிᾏὒ኱

‫୕ۑ‬ᾆ㍤ ࠊFan Qiaohuiࠊᰩཎ㞝୍ ࠊᆏཱྀ⥤ ࠊᱠᇉṇ࿃ ࠊ▼୸㝯 ࠊ⚄⏣✨ኴ ࠊ㧗ᶫ჆ኵ 䛆䛿䛨䜑䛻䛇㻌 ࢭࢩ࣒࢘㸦Cs㸧ࡣᒙ≧ࢣ࢖㓟ሷ࡟ᑐࡋ࡚ࠊ␗࡞ࡿ྾╔ຊࢆࡶࡘ」ᩘࡢࢧ
࢖ࢺ࡟྾╔ࡍࡿ࡜⪃࠼ࡽࢀ࡚࠸ࡿࠋ⚟ᓥ➨୍ཎⓎ㸦FDNPP㸧஦ᨾ࡛ᨺฟࡉࢀࡓᨺᑕᛶ
Cs ࡣࠊ୺࡟ᠱ⃮⢏Ꮚ࡟྾╔ࡉࢀࡓ≧ែ࡛Ἑᕝ୰࡟ᏑᅾࡍࡿࡀࠊἙᕝ࠿ࡽᾏὒ࡬࡜⛣⾜ࡍࡿ㐣⛬࡛ሷ⃰ᗘࡸ Cs ⃰ᗘࡢቑຍ࡟క࠸ࠊᠱ⃮⢏Ꮚ࠿ࡽ⁐⬺ࡉࢀࡿ࡜⪃࠼ࡽࢀࡿࠋ
ᮏ◊✲࡛ࡣࠊᒙ≧ࢣ࢖㓟ሷ࡬ࡢ Cs ࡢ྾⬺╔཯ᛂ࡟ᙳ㡪ࢆ୚࠼ࡿᅉᏊ࡜ࡋ࡚ሷ⃰ᗘ࡜ኳ↛᭷ᶵ≀࡟ὀ┠ࡋࠊ␗࡞ࡿሷ⃰ᗘ࡜᭷ᶵ≀⃰ᗘ࡛྾⬺╔ᐇ㦂ࢆ⾜࠸ࠊࡑࡢ྾⬺╔཯ᛂ࡬ࡢᙳ㡪ࢆㄪ࡭ࡓࠋࡲࡓࠊEXAFS ἲ࡟ࡼࡿᵓ㐀ゎᯒࡸ࢖࢜ࣥ஺᥮ࣔࢹࣝ㸦GAM㸧
࡟ࡼࡿ࢖࢜ࣥ஺᥮཯ᛂࡢࣔࢹࣝ໬ࡶ⾜ࡗࡓࠋ᭱⤊ⓗ࡟ࡣࠊࡇࢀࡽࡢ⤖ᯝ࡟ᇶ࡙ࡁ㝣ᇦ࠿ࡽᣢࡕ㎸ࡲࢀࡓᠱ⃮⢏Ꮚ࠿ࡽᾏỈ୰࡬࡜⁐ࡅฟࡍ Cs ࡢ๭ྜࢆồࡵࡿࡇ࡜ࡀ┠ᶆ࡛࠶ࡿࠋ䛆ᐇ㦂䛇 ヨᩱ࡟ࡣ⚟ᓥἈ࡛᥇ྲྀࡋࡓỿ㝆⢏Ꮚࠊᾏὒ⾲ᒙࡢᠱ⃮⢏ᏊࠊἙᕝࡢᠱ⃮⢏Ꮚࡸᾋ㐟◁ࢆ⏝࠸ࡓࠋ㐣㓟໬Ỉ⣲࡟ࡼࡿ᭷ᶵ≀㝖ཤࢆ⾜࠸ࠊ㝖ཤ๓ᚋ࡛ࡢ᭷ᶵⅣ⣲⃰ᗘࢆᐃࡋࡓࠋ᭷ᶵ≀㝖ཤ๓ᚋࡢ⢏Ꮚ࡟ᑐࡋ࡚ࠊἙᕝỈࡸᾏỈࡢሷ⃰ᗘ᮲௳࡛ 137Cs ࢺ࣮ࣞࢧ࣮ࢆῧຍࡋᅛᾮศ㓄ಀᩘ Kd ࢆồࡵࡓࠋࡇࢀࡽࡢ⢏Ꮚ୰ࡢ Cs ࡢ L3 ྾཰➃
EXAFS ࢆ Photon Factory BL-9A ᡈ࠸ࡣ BL-12C ࡛ ᐃࡋࡓࠋ⢏Ꮚ࡟྾╔ࡉࢀ࡚࠸ࡓ
FDNPP ⏤᮶ࡢ 137Cs ࡟ᑐࡋ࡚ࡶࠊ᭷ᶵ≀ࡢศゎ๓ᚋ࡛ἙᕝỈ࣭ᾏỈ࡟ࡼࡿ⬺╔ᐇ㦂ࢆ⾜࠸ࠊ137Cs ࡢ⬺╔㔞ࢆㄪ࡭ࡓࠋGAM ࡟ࡼࡿィ⟬ࢆ⾜࠸ࠊ␗࡞ࡿሷ⃰ᗘࡸ᭷ᶵ≀⃰ᗘ࡛ࡢ Kd ࢆồࡵࡓࠋ䛆⤖ᯝ䛸⪃ᐹ䛇 Cesium-137 ࢺ࣮ࣞࢧ࣮ࡢῧຍᐇ㦂࡛ࡣࠊ᭷ᶵ≀ࡢ㝖ཤᚋ࡛ Kd ࡣୖ᪼ࡋࡓࠋࡇࢀࡣࠊ᭷ᶵ≀࡟ࡼࡗ࡚⢏Ꮚ࡬ࡢ Cs ࡢ྾╔ࡀ㜼ᐖࡉࢀ࡚࠸ࡿࡇ࡜ࢆ♧၀ࡋ࡚࠸ࡿࠋࡲࡓࠊሷ⃰ᗘࡢቑຍ࡟ࡼࡾ Kd ࡣపୗࡋࡓࠋࡇࢀࡣࠊ࣒࢝ࣜ࢘࡞࡝ࡢ㝧࢖࢜ࣥ࡜Cs ࡜ࡢ࢖࢜ࣥ஺᥮࡟ࡼࡾ྾╔㔞ࡀῶᑡࡍࡿࡇ࡜ࢆ♧၀ࡋ࡚࠸ࡿࠋEXAFS ᐃ࡟ࡼࡗ࡚ࠊ᭷ᶵ≀ࡢ㝖ཤᚋ࡛ࡣෆᅪ㘒య࡜ࡋ࡚྾╔ࡉࢀࡿ Cs ࡢ๭ྜࡀቑ࠼ࡿࡇ࡜ࡀࢃ࠿ࡗ
ࡓࠋࡇࢀࡣࠊCs ࡢᒙ㛫࡬ࡢ྾╔ࢆ᭷ᶵ≀ࡀ㜼ᐖࡋ࡚࠸ࡿࡓࡵ࡜⪃࠼ࡽࢀࠊῧຍᐇ㦂ࡢ⤖ᯝ࡜ᩚྜⓗ࡛࠶ࡿࠋࡲࡓ᭷ᶵ≀ࡢ㝖ཤࡼࡾࡶࠊἙᕝ࡜ᾏὒ࡛ࡢሷ⃰ᗘࡢኚ໬ࡢ࡯
࠺ࡀࠊKd ࡟୚࠼ࡿᙳ㡪ࡀ኱ࡁ࠸ࡇ࡜ࡀศ࠿ࡗࡓࠋᐇ㝿࡟ἙᕝࠊἙཱྀࠊᾏὒ࡛ほ ࡉࢀ࡚࠸ࡿ Kd ࡜ GAM ࡟ࡼࡾィ⟬ࡉࢀࡓ Kd ࡣ࡯ࡰྠᵝࡢ⤖ᯝࢆ♧ࡋ࡚࠾ࡾࠊKd ࡢỈ㉁࡬ࡢ౫Ꮡᛶࡸᠱ⃮⢏Ꮚࡢ≉ᛶࢆ GAM ࡀ཯ᫎࡋ࡚࠾ࡾࠊࡇࢀ࡟ᇶ࡙ࡁᾏỈ࡟⁐⬺ࡍࡿ
ᨺᑕᛶ Cs ࡢ๭ྜࢆ᥎ᐃ࡛ࡁࡿࡇ࡜ࡀ♧၀ࡉࢀࡓࠋ

- 27 -

1A02

ࢭࢩ࣒࢘ࡸࣚ࢘⣲ࡢ⛣⾜ᣲື࡟ཬࡰࡍኳ↛᭷ᶵ≀ࡢᙳ㡪ᮾ኱㝔⌮1ࠊ୰ᅜ⛉Ꮫ㝔2ࠊ-$($3 ‫ۑ‬㧗ᶫ჆ኵ1ࠊ୕ᾆ㍤ࠊ)DQ4LDRKXL2ࠊ⏣୰୓ஓ3䛆⥴ゝ䛇 ⚟ᓥ➨୍ཎⓎ஦ᨾ࡛ᨺฟࡉࢀࡓ୺せ࡞ᨺᑕᛶ᰾✀ࢆᣢࡘࢭࢩ࣒࢘ࡸࣚ࢘⣲࡟ࡘ࠸࡚ࠊ
ᅵተࠊἙᕝࠊᾏὒ࡞࡝࡟࠾ࡅࡿ⎔ቃືែࢆᨭ㓄ࡍࡿᵝࠎ࡞⣲㐣⛬ࡢ◊✲ࡀ⢭ຊⓗ࡟㐍ࡵࡽࢀ࡚࠸ࡿࠋࡋ࠿ࡋ࡞ࡀࡽࠊࡇࡢ࠺ࡕኳ↛᭷ᶵ≀ࡢᙳ㡪࡟ࡘ࠸࡚ࡣࡲࡔ༑ศ࡞ゎᯒࡀ࡞ࡉࢀ࡚࠾
ࡽࡎࠊࡑࡢᐃ㔞ⓗ࡞ゎ᫂ࡀᚲせ࡛࠶ࡿࠋᮏㅮ₇࡛ࡣࠊኳ↛᭷ᶵ≀ࡢ኱༙ࢆ༨ࡵࡿ࡜⪃࠼ࡽࢀࡿ⭉᳜≀㉁ࡀࠊࢭࢩ࣒࢘ࡸࣚ࢘⣲ࡢᣲື࡟୚࠼ࡿᙳ㡪࡟ࡘ࠸࡚⪃ᐹࡋࡓ⤖ᯝࢆ⤂௓ࡍࡿࠋ䛆䝉䝅䜴䝮䛇 ࢭࢩ࣒࢘ࡢᣲືࢆᨭ㓄ࡍࡿせᅉ࡜ࡋ࡚ࠊᒙ≧ࢣ࢖㓟ሷ࡬ࡢ྾╔ࡀ㔜せ࡛࠶ࡿࡇ࡜
ࡀศ࠿ࡗ࡚࠸ࡿࠋࡇࡢ྾╔཯ᛂ࡛ࡣࠊᒙ㛫࡟Ꮡᅾࡍࡿ siloxane ࡢ 6 ဨ⎔࡬ࡢᵓ㐀ⓗ࡞㐺ྜᛶࡀ㔜せ࡛࠶ࡿࡇ࡜ࡀ♧၀ࡉࢀࠊࡇࡢࡼ࠺࡞໬Ꮫ✀ࡣᗈᇦ X ⥺྾཰ᚤ⣽ᵓ㐀㸦EXAFS㸧ࡢゎᯒ࡛ࡣࠊෆᅪ㘒య࡜ࡋ᳨࡚ฟࡉࢀࡿࠋ୍᪉ࠊ⭉᳜≀㉁ࡀᏑᅾࡋࠊࡇ࠺ࡋࡓᒙ≧ࢣ࢖㓟ሷ࡜」ྜ
యࢆసࡗࡓሙྜࠊࢭࢩ࣒࢘ࡢᒙ㛫࡬ࡢ྾╔཯ᛂࡀ㜼ᐖࡉࢀࠊEXAFS ⓗ࡟ࡣእᅪ㘒యࢆᙧᡂࡍ
ࡿࡇ࡜ࡀศ࠿ࡗ࡚࠸ࡿࠋࡇࡢ᫬࡟᳨ฟࡉࢀࡿእᅪ㘒య࡜ࡋ࡚ࠊᒙ≧ࢣ࢖㓟ሷࡢ⾲㠃ࡢ planarsite ࡀእᅪ㘒యࢆ྾╔ࡍࡿࢧ࢖ࢺ࡟┦ᙜࡍࡿ࡜⪃࠼ࡽࢀࡿࠋ୍᪉࡛ࠊ⭉᳜≀㉁⮬㌟ࡶ㈇㟁Ⲵࢆᖏࡧ࡚࠾ࡾࠊࢭࢩ࣒࢘ࢆእᅪ㘒య࡜ࡋ࡚྾╔࡛ࡁࡿྍ⬟ᛶࡀ࠶ࡿࠋࡇࡢࡼ࠺࡞⭉᳜≀㉁࡜ࢭ
ࢩ࣒࢘ࡢ㘒⏕ᡂ࡟ࡘ࠸࡚ࠊࡇࢀࡲ࡛ᐃ㔞ⓗ࡟⪃ᐹࡉࢀࡓࡇ࡜ࡣṤ࡝࡞࠸ࠋࡑࡇ࡛ᡃࠎࡣࠊ137Cs
ࢺ࣮ࣞࢧ࣮ࢆ⏝࠸ࡓ㝈እࢁ㐣ἲ㸦ศ⏬ศᏊ㔞: 1000 Da㸧࡟ࡼࡾࠊ⭉᳜≀㉁࡜ࢭࢩ࣒࢘ࡢ㘒⏕ᡂᐃᩘșࡢ ᐃࢆヨࡳࡓࠋࣇ࣑ࣥ㓟㸦HA㸧ࡢ㓟ゎ㞳ᇶࡢ⃰ᗘ[A]ࢆ⏝࠸࡚ș㸻[CsA]/[Cs+][A-])࡜ᐃ⩏ࡋࡓሙྜࠊHA ࡢ㓟ゎ㞳ᗘࡀ 0.9-1.0 ⛬ᗘࡢ⠊ᅖ࡛ logș=4 ⛬ᗘ࡜࡞ࡿࡇ࡜ࡀศ࠿ࡗࡓࠋࡇࢀࡣࠊCa2+࡞࡝ࡢ 2 ౯ࡢ㝧࢖࢜ࣥ࡜ࡢș࡜ẚ㍑ࡍࡿ࡜ 2 ᱆⛬ᗘᑠࡉ࠸࡜ࡳࡽࢀࡿࡶࡢࡢࠊ
⁐Ꮡ᭷ᶵ≀⃰ᗘࡀ 10 mg/L ௨ୖࡢኳ↛Ỉ࡛ࡣࠊࢭࢩ࣒࢘ࡢ⁐Ꮡ≧ែ࡜ࡋ࡚ࠊ⭉᳜≀㉁࡜ࡢ㘒⏕ᡂࡣ↓ど࡛ࡁ࡞࠸ࡇ࡜ࢆ♧၀ࡍࡿࠋࡲࡓࡇࡢșࡀᅛయ≧ែ࡛ࡶྠᵝࡢ್ࢆಖࡗࡓ࡜ࡍࡿ࡜ࠊ
⭉᳜≀㉁ࢆከ㔞࡟ྵࡴᠱ⃮⢏Ꮚ࡬ࢭࢩ࣒࢘ࡢ྾╔ศ㓄ಀᩘ㸦Kd㸧ࡣࠊࡇࡢș࡛༑ศㄝ᫂ྍ⬟࡞್࡛࠶ࡗࡓࠋࡑࡢࡓࡵࠊ⭉᳜≀㉁ࡢᏑᅾࡣࠊᒙ≧ࢣ࢖㓟ሷᒙ㛫࡬ࡢࢭࢩ࣒࢘ࡢ྾╔ࢆ≀⌮ⓗ࡟㜼ᐖࡍࡿࡀࠊእᅪᆺࡢᙅ࠸྾╔ࢧ࢖ࢺ࡜ࡋ࡚ࢭࢩ࣒࢘ࢆಖᣢࡋ࡚࠸ࡿྍ⬟ᛶࡀ࠶ࡿࠋࡲ
ࡓࡇࢀࡽࡢ◊✲ࡣࠊࣜࢱ࣮ᒙ࡬ࡢࢭࢩ࣒࢘ࡢಖᣢ࡞࡝࡟ࡘ࠸࡚ࡶ㛵㐃ࡍࡿྍ⬟ᛶࡀ࠶ࡿࠋ
䛆䝶䜴⣲䛇 ࣚ࢘⣲ࡢᅵተ୰࡛ࡢ㖄┤ศᕸࡣࠊ⾲ᒙ࡛⃰ᗘࡀ㧗ࡃ῝㒊࡛ᛴ⃭࡟⃰ᗘࡀῶᑡࡍࡿഴ
ྥࢆ࡜ࡾࠊࢭࢩ࣒࢘࡜㢮ఝࡢᣲືࢆ♧ࡍሙྜࡀከ࠸ࠋࡋ࠿ࡋࠊࣚ࢘⣲ࡣࣚ࢘໬≀ࠊࣚ࢘⣲㓟ࡢ࠸ࡎࢀࡢሙྜࡶ㝜࢖࢜ࣥࢆᙧᡂࡍࡿࡓࡵࠊࡑࡢ⣲㐣⛬ࡣࢭࢩ࣒࢘࡜ࡣ␗࡞ࡿ࡜⪃࠼ࡽࢀࡿࠋ
ࡇࢀࡲ࡛ࡢ◊✲࡛ࠊࣚ࢘⣲ࡣ⭉᳜≀㉁୰ࡢ࣋ࣥࢮࣥ⎔࡟ồ㟁Ꮚ⨨᥮཯ᛂ࡛ྲྀࡾ㎸ࡲࢀࠊ᭷ᶵ
ࣚ࢘⣲࡜࡞ࡿࣉࣟࢭࢫࡀ㔜せ࡛࠶ࡿࡇ࡜ࡀศ࠿ࡗ࡚࠸ࡿࠋᡃࠎࡣࠊ2011 ᖺ 4 ᭶ 13 ᪥࡟㒆ᒣ࡛᥇ྲྀࡋࡓᅵተࢥ࢔ヨᩱ࡟ࡘ࠸࡚ࠊࣚ࢘⣲㸦⚟ᓥ➨୍ཎⓎ஦ᨾ⏤᮶ࡢ 131I㸧ࡢ⁐ฟᐇ㦂ࢆ⾜ࡗࡓࠋࡑࡢ⤖ᯝࠊࣚ࢘⣲ࡢ⁐ฟ⋡ࡣ࢔ࣝ࢝ࣜᛶ࡛ቑຍࡋࠊࡑࡢᢳฟᾮࢆ㓟ᛶ࡟ࡍࡿ࡜⭉᳜≀㉁ࡢ୍
㒊ࡀỿẊࡍࡿࡀࠊࡑࡢ㝿ࠊ50%⛬ᗘࡢࣚ࢘⣲ࡀỿẊ࡟ྲྀࡾ㎸ࡲࢀࡓࠋࡇࢀࡽࡢᣲືࡣࠊࣚ࢘
⣲ࡀ⭉᳜≀㉁୰࡟ඹ᭷⤖ྜ࡛ྲྀࡾ㎸ࡲࢀࡓࡇ࡜ࢆព࿡ࡋࠊ஦ᨾᚋ 1 ࣨ᭶௨ෆ࡟ᅵተ୰ࡢࣚ࢘
⣲ࡀ᭷ᶵ໬ࡋࡓࡇ࡜ࢆ♧၀ࡍࡿࠋ୍᪉ࠊࡇࢀࡲ࡛ࡢᐇ㦂࡛ࠊ⭉᳜≀㉁࡟ྲྀࡾ㎸ࡲࢀࡓ᭷ᶵែ
ࣚ࢘⣲ࢆ㑏ඖ⎔ቃ࡟ಖࡘ࡜ࠊࣚ࢘⣲ࡀ⬺㞳ࡍࡿഴྥࡶぢࡽࢀࡓࠋᚑࡗ࡚ࠊ௒ᚋࣚ࢘⣲ࡢືែࢆㄪ࡭ࡿୖ࡛ࠊ᭷ᶵែࣚ࢘⣲ࡢᏳᐃᛶࢆㄪ࡭ࡿࡇ࡜ࡀ㔜せ࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ

- 28 -

ࢥࢩ࢔ࣈࣛࡢᨺᑕᛶࢭࢩ࣒࢘⵳✚⤒㐣

1A03

ᮾ኱㝔㎰ ࠊி኱㝔᝟ሗ ࠊᨺᑕ⥺Ᏻ඲ࣇ࢛࣮࣒ࣛ ࠊఀ㐩ᕷᙺᡤ  ‫ۑ‬஧⎼┤Ⓩ
ࠊ኱ᡭಙே ࠊከ⏣㡰୍㑻 ࠊ㯮ἑᓫ ࠊ᰿ᮏᆂ௓ 䛆⥴ゝ䛇⚟ᓥ┴ࡀᐇ᪋ࡋ࡚࠸ࡿ㎰⏘≀ࡢࣔࢽࢱࣜࣥࢢ᳨ᰝ࡟ࡼࡿ࡜ࠊࢥࢩ࢔ࣈࣛࡢⴥࡢᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࡣཎⓎ஦ᨾᚋ࠿ࡽ㧗࠸್ࢆ♧ࡍࡶࡢࡀᩓぢࡉࢀࡿࡀࡑࡢせᅉゎ᫂ࡣ㐍ࢇ࡛࠸࡞࠸ࠋࢥࢩ࢔ࣈࣛ
ࡢⴥࡢᨺᑕᛶࢭࢩ࣒࢘⵳✚࡟㛵ࡍࡿᇶ♏ⓗ▱ぢࢆᚓࡿࡓࡵࠊ⚟ᓥࡢ᳃ᯘ࡟⮬⏕ࡍࡿࢥࢩ࢔ࣈࣛⱝ
ᮌࢆᑐ㇟࡟ࠊ㒊఩ูࡸ⤒ᖺኚ໬ࡢᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࡢ㐪࠸ࢆ᳨ウࡋࡓࠋ䛆ᐇ㦂䛇ࢥࢩ࢔ࣈࣛⱝᮌෆࡢ㒊఩ูㄪᰝ࡜ࡋ࡚ࠊ㡬ⱆ࡜ࡋ࡚ⱝᮌඛ➃࡟Ꮡᅾࡍࡿ㛗ᯞ㸦ᯞ࡜ࡋ࡚ఙ㛗ࡍࡿ㒊఩㸧࡟ᒎ㛤ࡍࡿⴥ㸦12 ᯛ㸧ࠊഃⱆ࡜ࡋ࡚ⱝᮌ୰ኸ㒊࡟Ꮡᅾࡍࡿ㛗ᯞ࡟ᒎ㛤ࡍࡿⴥ㸦8 ᯛ㸧ࠊ࠾ࡼࡧഃⱆ࡜ࡋ࡚ⱝᮌᇶ㒊ഃ࡟Ꮡᅾࡍࡿ▷ᯞ㸦ᯞ࡜ࡋ࡚ఙ㛗ࡏࡎⴥࡔࡅࢆྀ⏕ࡍࡿ㒊఩㸧࡟ᒎ㛤ࡍࡿⴥ㸦6 ᯛ㸧ࢆ 2015 ᖺᗘ 5 ᭶ 2 ᪥࡟᥇ྲྀࡋࡓࠋ࿘ᖺ⤒㐣࡛ࡣࠊࡲࡎྠ୍ᩳ㠃࡟ἢࡗ࡚⮬⏕ࡍࡿࢥࢩ࢔ࣈࣛ㸦ᑿ᰿ഃ 3 ᮏࠊ୰ኸ㒊 4 ᮏࠊ㇂ഃ 4 ᮏ㸧ࢆᑐ㇟࡜ࡋࠊ2015 ᖺ 5 ᭶ 2 ᪥ࠊ6 ᭶ 29 ᪥ࠊ9 ᭶
22 ᪥࡟ⴥࢆ᥇ྲྀࡋࡓࠋࡉࡽ࡟᫓ඛࡢᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࡢᣲືࢆヲ⣽࡟ㄪᰝࡍࡿࡓࡵ࡟ࠊ2015ᖺ࡜ࡣูࡢ᳃ᯘ࡟⮬⏕ࡍࡿࢥࢩ࢔ࣈࣛ 2 ᮏࢆᑐ㇟࡟ࠊ2016 ᖺ 4 ᭶ 29 ᪥ࠊ5 ᭶ 5 ᪥ࠊ5 ᭶ 8 ᪥ࠊ5
᭶ 13 ᪥ࠊ6 ᭶ 4 ᪥࡟ⴥࢆ᥇ྲྀࡋࡓࠋ᥇ྲྀࡋࡓⴥࡣࢤ࣐ࣝࢽ࣒༙࢘ᑟయ᳨ฟჾ࡛ᨺᑕᛶࢭࢩ࣒࢘ࢆ
ᐃࡋࠊࢧࣥࣉࣝࡢ୍㒊࡟ࡘ࠸࡚ࡣ ICP-OES ࡟࡚ሷᇶᡂศࢆ ᐃࡋࡓࠋࢥࢩ࢔ࣈࣛⱝᮌࡢ㒊఩࡟ࡼࡿᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࡣࠊ㛗ᯞ࡜▷ᯞࠊ࠶ࡿ࠸ࡣᮌࡢඛ➃ࠊ୰ኸࠊᇶ㒊࡛ᒎ㛤ࡍࡿⴥࡢ㛫࡟᫂☜࡞ᕪࡣぢ࠸ࡔࡏ࡞࠿ࡗࡓ㸦ᅗ 1㸧ࠋ୍᪉ࠊ2015 ᖺ࡟ᐇ᪋ࡋࡓ࿘ᖺ⤒㐣࡟ࡘ࠸࡚ࡳࡿ࡜ࠊ⮬⏕ࡍࡿሙᡤ㸦ᑿ᰿ഃࠊ୰ኸࠊ㇂ഃ㸧ࢆၥࢃࡎ 5 ᭶ 2 ᪥ࡢㄪᰝ᫬ࡀ᭱ࡶ㧗ࡃࠊᡂ⇍ࡍࡿ࡟ࡋࡓࡀ࠸༙ศ௨ୗ࡟పୗࡋࡓ㸦ᅗ 2㸧ࠋⴥࡢ࣒࢝ࣜ࢘⃰ᗘࡶྠᵝࡢഴྥࢆ♧ࡋࠊᨺᑕᛶ
ࢭࢩ࣒࢘ࡣ᪂ⴥᒎ㛤᫬࡟࣒࢝ࣜ࢘࡜ྠ᫬࡟ὶධࡋ࡚࠸ࡿ࡜᥎ᐹࡉࢀࡓࠋ᫓ඛࡢ⃰ᗘኚ໬ࢆヲ⣽࡟᳨ウࡋࡓ 2016 ᖺ࡛ࡣࠊ5 ᭶ୖ᪪࡟ᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࡢࣆ࣮ࢡࡀㄆࡵࡽࢀࡓ㸦ᅗ 3ࠊࢥࢩ࢔ࣈࣛ
ձ㸧ࡀࠊྠ୍᳃ᯘෆࡢูࡢࢥࢩ࢔ࣈ࡛ࣛࡣㄪᰝᮇ㛫ࢆ㏻ࡌ࡚ࡢ⃰ᗘኚ໬ࡀഹ࠿࡛࠶ࡗࡓ㸦ᅗ 3ࠊࢥࢩ࢔ࣈࣛղ㸧ࠋ᫓ඛࡢᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࡢୖ᪼ࡣᒣ⳯࡜ࡋ࡚฼⏝ࡍࡿ᫬ᮇ࡜୍⮴ࡋ࡚࠸ࡿࡓࡵ࡟
ὀពࡀᚲせ࡛࠶ࡿࡀࠊㄪᰝࢧ࢖ࢺ࡟ࡼࡗ࡚ࡣ᫓ඛࡢ⃰ᗘୖ᪼ࡀഹ࠿࡛࠶ࡿ஦౛ࡶ࠶ࡾࠊᅵተ᮲௳࡞࡝ᮏせᅉࡢゎ᫂ࡀ௒ᚋࠊᏳᚰࡋ࡚ᒣ⳯ࢆ฼⏝ࡍࡿࡓࡵࡢ୍ࡘࡢࣄࣥࢺ࡟࡞ࡿ࡜⪃࠼ࡽࢀࡓࠋ




᭶᪥

ࢥࢩ࢔ࣈࣛձ













㛗ᯞ
㸦㡬ⱆ㸧
Q 

ᅗ

ᨺᑕᛶCs Bq/kg

ࢥࢩ࢔ࣈࣛղ



᭶᪥
ᨺᑕᛶCs Bq/kg

ᨺᑕᛶCs Bq/kg

᭶᪥

▷ᯞ
㛗ᯞ
㸦ഃⱆ୰ኸ㸧 㸦ഃⱆᇶ㒊㸧Q Q 㛗ᯞࠊ▷ᯞ࡟ᒎ㛤ࡍࡿⴥ
ࡢᨺᑕᛶ&V⃰ᗘ ᖺ㸧

ᑿ᰿ഃ
Q 

୰ኸ
Q 

ᅗ

㇂ഃ
Q 

ᨺᑕᛶ&V⃰ᗘࡢ࿘ᖺ⤒㐣 ᖺ㸧᭶᪥ ᭶᪥ ᭶᪥ ᭶᪥ ᭶᪥

ᅗ᫓ඛࡢᨺᑕᛶ&V⃰ᗘ⤒㐣 ᖺ㸧Accumulation Process of Radiocesium for Koshiabura(Acanthopanax sciadophylloides)
NIHEI, N., OHTE, N., TADA J., KUROSAWA T., NEMOTO K.

- 29 -



1A04

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

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Êvĭò ËÙ§© 2Ð¨fþ=MJ>D _¡]y 2ĥ²\ 2ÈĨc} 

ÆÈÏ\ 2ÆĨ§® 



ĵzį 2



ß¼Ď (kBq mg-1 Cs )

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[1] Martine C. Duff, Mary L. Ramsey, J. Environ. Radioactiv. 99, 912-932 (2008).
[2] ÆÈÏ\

ĵzį

ÆĨ§®

[3] Ð¨fþ=MJ>DmëÞ, ñėą 5590194 (P5590194), £´ 26 ¤ http://www.kinokkusu.co.jp/saibai/saibai.html

A chemical behavior of cesium in substrates for cultivated Shiitake
MURANOI, T., KINO, Y., ITABASHI, Y., NAKAJIMA, T., KORIYAMA, S., KIMURA, E.,
SHIGIHARA, T.

- 30 -

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[1] ¶ěõí/;>PuSr0Ç÷dÄ0ÿÅ/*+ī«239¿30¹êČĬ

Estimation of Sr-90 and Cs-137 contamination in habitat of cattle by measuring ofradioactive concentration in teeth.
KOARAI, K., KINO, Y., NISHIYAMA, J., TAKAHASHI, A., SUZUKI, T., SHIMIZU, Y.,
CHIBA, M., OSAKA, K., SASAKI, K., FUKUDA, T., ISOGAI, E., OKA, T., SEKINE, T.,
FUKUMOTO, M. and SHINODA, H.

- 31 -



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[1] Williams, R. A. D. & Elliott, J. C. Basic and applied dental biochemistry 2nd ed. 32–33
 (Churchill Livingstone, 1989).
[2] Brown, B et al. Postnatal tooth development in cattle. Am. J. Vet. Res. 21, 7–34 (1960).
[3] \ºµm et al. óÎÈ)àz. óÎÈØãS(2015)

Time course change in Sr-90 concentration in hard tissues of cattle suffered from the Fukushima
Daiichi Nuclear Power Plant accident
NISHIYAMA, J., KOARAI, K., KINO, Y., SHIMIZU, Y., TAKAHASHI, A., SUZUKI, T., CHIBA, M.,
OSAKA, K., SASAKI, K., FUKUDA, T., ISOGAI, E., OKA, T., SEKINE, T., FUKUMOTO, M.,
SHINODA, H.

- 32 -



1A07⚟ᓥ┴ᕝಛ⏫࡛᥇ྲྀࡋࡓᅵተࡢ 90Sr ࡢ῝ᗘศᕸ㜰኱㝔⌮ࠊ㜰኱5,ࢭࠊ⟃Ἴ኱ ‫ۑ‬㕥ᮌᮥ⳯㸯ࠊᙇᏊぢࠊ஧ᐑ࿴ᙪࠊ
ᒣཱྀ႐ᮁࠊ㧗ᶫ⣧Ꮚࠊᜠ⏣⿱୍ࠊ⠛ཎཌ

䛆⥴ゝ䛇⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾ࡟ࡼࡾࠊ኱㔞ࡢᨺᑕᛶ᰾✀ࡀ኱Ẽ୰࡬ᨺฟࡉࢀࡓࠋࡑࡢ୰
࡛ࡶࠊᨺᑕᛶࢭࢩ࣒࢘(134Csࠊ137Cs)ࡸ 90Sr ࡞࡝ࡢ㛗༙ῶᮇࡢᨺᑕᛶ᰾✀ࡢ⎔ቃ୰ࡢศᕸࡣࠊ㛗ᮇⓗ࡞⿕ࡤࡃᙳ㡪ࡸ⎔ቃືែࢆ▱ࡿ࠺࠼࡛㔜せ࡛࠶ࡿࠋᨺᑕᛶࢭࢩ࣒࢘ࡣࠊγ ⥺ᨺฟ᰾✀࡛࠶ࡿࡇ࡜࠿ࡽࠊGe ༙ᑟయ᳨ฟჾ࡟ࡼࡿᐃ㔞ࡀྍ⬟࡛࠶ࡿࡓࡵࠊศᕸࡸ᫬㛫ኚ໬➼ࡢᵝࠎ࡞◊✲ࡀ⾜ࢃࢀ࡚࠸ࡿࠋࡑࢀ࡟ᑐࡋ࡚ࠊ⣧ β ⥺ᨺฟ᰾✀ࡢ 90Sr ࡣࠊ௚ࡢጉᐖ᰾✀࠿ࡽศ㞳ࡍࡿᚲせࡀ࠶ࡿࡀࠊศ㞳ᐃ㔞ࡢᅔ㞴ࡉ࠿ࡽ࡯࡜ࢇ࡝◊✲ࡀ⾜ࢃࢀ࡚࠸࡞࠸ࠋࡋ࠿ࡋ࡞ࡀࡽࠊᅵተ࡟ỿ
╔ࡋࡓ 90Sr ࡣᨺᑕᛶࢭࢩ࣒࢘࡜໬Ꮫⓗᛶ㉁ࡀ␗࡞ࡗ࡚࠾ࡾࠊ90Sr ࡢ⎔ቃ୰࡛ࡢ⛣⾜㐣⛬ࢆ▱ࡿࡇ࡜ࡣ㔜せ࡛࠶ࡿࠋࡑࡇ࡛ࠊᮏ◊✲࡛ࡣᅵተ୰ࡢ 90Sr ࡜ᨺᑕᛶࢭࢩ࣒࢘ࢆศᯒࡋࠊ῝ᗘศᕸࢆㄪ࡭ࡓࡢ࡛ሗ࿌ࡍࡿࠋ
䛆ᐇ㦂䛇ᮏ◊✲࡛ࡣࠊ⚟ᓥ┴ᕝಛ⏫ࡢࢫࢠⱝ㱋ᯘ࡛᥇ྲྀࡉࢀࡓᅵተヨᩱ࡟ࡘ࠸࡚῝ᗘศᕸࢆస
ᡂࡋࡓࠋᅵተࡣࢫࢡ࣮ࣞࣃࣉ࣮ࣞࢺ࡟ࡼࡾ᥇ྲྀࡋࠊ⾲ᒙ࠿ࡽ 5cm ࡲ࡛ࢆ 0.5cm ࡎࡘ࡛ศࡅࡓ
10 ヨᩱࡢศᯒࢆ⾜ࡗࡓࠋᅵተ࡟ࡣࠊᵝࠎ࡞ᨺᑕᛶ᰾✀ࡀྵࡲࢀ࡚࠸ࡿࡀࠊࡍ࡛࡟㏙࡭ࡓ࡜࠾ࡾࠊ90Sr ࡣ⣧ β ⥺ᨺฟ᰾✀࡛࠶ࡿࡇ࡜࠿ࡽࠊ໬Ꮫⓗ࡟ศ㞳ࡍࡿᚲせࡀ࠶ࡿࠋࡑࡇ࡛ࠊᮏᐇ㦂࡛ࡣྂ඾ⓗ࡞ỿẊศ㞳ἲ࡟ࡼࡾࠊᅵተ୰ࡢ 90Sr ࡢ༢㞳ࢆ⾜ࡗࡓࠋ༢㞳ࡉࢀࡓ 90Sr ࡣࠊ᭱⤊ⓗ࡟Ⅳ㓟ሷ࡜ࡋ࡚ᚓࡽࢀࠊ (1㸩3)ሷ㓟⁐ᾮ࡜ࡋ࡚ ᐃヨᩱࢆస〇ࡋࡓࠋ 90Sr ࡢፉ᰾✀࡛࠶ࡿ
90
Y ࡢᨺฟࡍࡿ β ⥺ࡀࠊ⁐ᾮ୰࡛Ⓨࡍࡿࢳ࢙ࣞ
ࣥࢥࣇගࢆᾮయࢩࣥࢳ࣮ࣞࢩࣙࣥ࢝࢘ࣥࢱ࣮
(LSC)࡟ࡼࡾ ᐃࡋࠊ90Sr ࡢᐃ㔞ࢆ⾜ࡗࡓࠋࡇࡢ ᐃࡣぶ᰾✀࡛࠶ࡿ 90Sr ࡜ፉ᰾✀࡛࠶ࡿ 90Y
ࡀỌ⥆ᖹ⾮࡟㐩ࡍࡿࡲ࡛ࡢ⣙ 2 㐌㛫⾜࠸ࠊࡑࡇ࠿ࡽᚓࡽࢀࡓ 90Y ࡢᨺᑕ⬟⃰ᗘ࠿ࡽ 90Sr ࡢᐃ㔞ࢆ⾜ࡗࡓࠋ໬Ꮫศ㞳࡟࠾ࡅࡿ཰⋡ࡣࠊ໬Ꮫศ㞳ึᮇࡢ⁐ᾮ࡜ LSC ᐃᚋࡢ⁐ᾮ୰࡟ྵࡲࢀࡿ
Sr ᢸయ㔞ࢆࠊICP-MS ࡟ࡼࡾ ᐃࡍࡿࡇ࡜࡟ࡼ
ࡗ࡚ồࡵࡓࠋ
䛆⤖ᯝ䞉⪃ᐹ䛇ᅗ 1 ࡟ 2013 ᖺ 7 ᭶࡟᥇ྲྀࡉࢀࡓᅵ
ተヨᩱࡢ 90Sr ࡢ῝ᗘศᕸࢆ♧ࡍࠋ90Sr ࡢᨺᑕ⬟ࡣ᥇ྲྀᅵተࡢ῝ᗘ࡟ࡼࡾῶᑡࡋ࡚࠸ࡃࡇ࡜ࡀ
ศ࠿ࡗࡓࠋࡲࡓࠊ90Sr ࡜ᨺᑕᛶࢭࢩ࣒࢘ࡢᨺᑕ
⬟ẚࢆㄪ࡭ࡓ࡜ࡇࢁࠊ῝ᗘ࡟ࡼࡾ␗࡞ࡿࡇ࡜ࡀ
ศ࠿ࡗࡓࠋࡇࡢࡇ࡜ࡣࠊᅵተ୰ࡢ 90Sr ࡜ᨺᑕᛶࢭࢩ࣒࢘ࡢ໬Ꮫⓗᣲືࡢ㐪࠸ࡀ࠶ࡿࡇ࡜ࢆ♧ᅗ㸯㸸2013 ᖺ 7 ᭶࡟ᕝಛ⏫࡛᥇ྲྀࡉࢀࡓ
ࡋ࡚࠸ࡿࠋヲ⣽࡟ࡘ࠸࡚ࡣㅮ₇࡛㆟ㄽࡍࡿࠋᅵተࡢ 90Sr ῝ᗘศᕸ
Depth-profiling of 90Sr concentrations in soil at Kawamata Town, Fukushima Prefecture
SUZUKI, A.,ZHANG, Z.,NINOMIYA, K.,YAMAGUCHI, Y.,TAKAHASHI, J.,ONDA, Y.,SHINOHARA,A.

- 33 -

ġ$ᮾ㟁⚟ᓥཎⓎ஦ᨾ┤ᚋ࡟᥇ྲྀࡉࢀࡓ኱Ẽᾋ㐟ሻヨᩱ୰ࡢ ,, ẚ㤳㒔኱㝔⌮ᕤ ࠊ5(67(&ࠊᮾ኱㝔ᕤ ࠊ㒔⏘ᢏ◊ࢭ ࠊ⌮◊ோ⛉ࢭ ࠊᮾ኱ 0$/7ࠊ᪥኱ᩥ⌮ ࠊி኱ཎᏊ⅔  ‫ۑ‬ᾏ⪁ཎ඘ ࠊ኱ᾆὈႹ ࠊⓑ஭┤ᶞ ࠊ㭯⏣἞㞝 ࠊ᳃ཱྀ♸୍ ࠊỌᕝᰤὈ ࠊḈ஭᪼ ࠊ⩚ሙᏹග ࠊᯇᓮᾈஅ ࠊᒣᙧṊ㟹 ࠊỌ஭ᑦ⏕ ࠊ㛵ᮏಇ 䛆⥴ゝ䛇 , ࡜ , ࡣ 8 ࡢ⇕୰ᛶᏊㄏ㉳᰾ศ⿣཯ᛂ࡟ࡼࡗ࡚⏕ᡂࡍࡿ௦⾲ⓗ࡞ᨺᑕᛶࣚ࢘⣲᰾✀࡛࠶ࡿࡀࠊࡑࡢ༙ῶᮇࡣ , ࡀ㸶᪥࡟ᑐࡋ࡚ , ࡀ  ୓ᖺ࡜ᑐ↷ⓗ࡛࠶ࡿࠋ ᖺࡢᮾ᪥ᮏ኱㟈⅏࡟ࡼࡗ࡚ᘬࡁ㉳ࡇࡉࢀࡓᮾி㟁ຊ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾ࡟ࡼࡗ࡚኱㔞ࡢᨺᑕᛶ᰾✀ࡀ⎔ቃ୰࡟ᨺฟࡉࢀࠊ௒࡞࠾ࡑࡢ೺ᗣ࡬ࡢᙳ㡪ࡀ㆟ㄽࡉࢀ࡚࠸ࡿࡀࠊ༙ῶᮇࡢ▷࠸, ࡢᙳ㡪࡟㛵ࡋ࡚ࡣࠊࡑࡢ㔜せᛶ࡟ࡶ㛵ࢃࡽࡎࠊ༙ῶᮇࡀ▷࠸ࡇ࡜࠿ࡽࠊ༑ศゎ᫂ࡉࢀ࡞࠸ࡲࡲ⌧ᅾ࡟⮳ࡗ࡚࠸ࡿࠋᮏ◊✲࡛ࡣࠊ㛗༙ῶᮇ᰾✀ , ࡟╔┠ࡋࠊࡑࡢᏑᅾ㔞ࢆ㏻ࡋ࡚ࠊ
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- 34 -

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Autoradiographs and 129I/137Cs ratios for atmospheric particular matters collected just after TEPCOOFDNPP accident
OURA Y., EBIHARA M., SHIRAI N., TSURUTA H., NAKAJIMA T., MORIGUCHI Y., OHARA
T., NAGAKAWA Y., SAKURAI N., HABA H., MATSUZAKI H.

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SATOU, Y., SUEKI, K., SASA, K.

- 36 -

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࡚࠸ࡿࠋࡑࡋ࡚ࠊ஦ᨾ࠿ࡽ 1 ᖺ௨ୖ⤒㐣ࡋࡓࡢࡕ࡛ࡶࠊᨺᑕᛶ≀㉁ࡀ᳜≀୰࡛ࢻࢵࢺ≧࡟ศᕸࡋ࡚࠸ࡿࡇ࡜ࡀሗ࿌ࡉࢀ࡚࠸ࡿࠋᨺᑕᛶ≀㉁ࡢ᳃ᯘ࡬ࡢึᮇỿ╔㔞ࡢぢ✚ࡶࡾࡸࠊ㛗ᮇ㛫࡟ࢃࡓࡿ᳃ᯘෆ࡛ࡢᨺᑕᛶ≀㉁ࡢᚠ⎔ࢆ⪃࠼ࡿ࠺࠼࡛ࠊᨺᑕᛶ≀㉁ࡀ᳜≀࡟࡝ࡢࡼ࠺࡟ỿ╔ࡋ྾཰ࡉࢀࠊࡶࡋࡃࡣṧ␃ࡍࡿ࠿ࢆ▱ࡿࡇ࡜ࡣ㔜せ࡛࠶ࡿࠋࡋ࠿ࡋ࡞ࡀࡽ㐣ཤࡢ◊✲࡛ࡣࠊ㎰స≀࡬ࡢᨺᑕᛶ≀㉁ࡢ྾཰࠾ࡼࡧ⁐⬺࡟ࡘ࠸࡚ࠊ㔞ࡶࡋࡃࡣ㏿ᗘ࡟㛵ࡍࡿ㆟ㄽࡀ࡯࡜ࢇ࡝
࡛࠶ࡾࠊⴥ㠃ୖ࡟࠾ࡅࡿᨺᑕᛶ≀㉁ࡢศᕸࡸ໬Ꮫ≧ែ࡟㛵ࡍࡿ㆟ㄽࡣࡉࢀ࡚࠸࡞࠸ࠋ
ᮏ◊✲ࡢ┠ⓗࡣࠊ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤࡢ஦ᨾ࡟࠾࠸࡚ᨺฟࡉࢀࡓᨺᑕᛶ Cs ࡢࠊ᳜⏕࡬ࡢỿ╔ᣲື࠾ࡼࡧ㝆㞵➼࡟ࡼࡿ⁐㞳ᣲືࡢ෌⌧ࢆ⾜࠺ࡇ࡜࡛ࠊ஦ᨾᚋ࡟᳃ᯘᇦ࡛ぢࡽࢀࡓᨺᑕ
⬟ởᰁ≧ἣࡢཎᅉࢆ᥈ࡿࡇ࡜࡛࠶ࡿࠋࡑࡇ࡛ᮏ◊✲࡛ࡣࠊᨺᑕᛶ Cs ࢆྵࢇࡔ⁐ᾮࡶࡋࡃࡣ࢚
࢔ࣟࢰࣝࢆ᳜≀ࡢⴥ㠃࡟┤᥋ỿ╔ࡉࡏࠊ୍ᐃ᫬㛫ᚋ࡟Ỉ࡟ࡼࡗ࡚⁐㞳ࡋࠊⴥ࡬ࡢᨺᑕ⬟ࡢṧ␃㔞࠾ࡼࡧศᕸࢆࠊᨺᑕ⬟ ᐃࢆ㏻ࡋ࡚ホ౯ࡋࡓࠋ䛆ᐇ㦂䛚䜘䜃⤖ᯝ䛇ⴥ㠃ỿ╔ᐇ㦂࡛ࡣࠊ⁐ᾮ࡜ࡋ࡚ࠊ㐣ཤࡢ◊✲ࢆཧ⪃࡟ࡋ࡚ࠊ10-3 M ࡢ Na2SO4,
Cs2SO4, NaCl, CsCl ⁐ᾮ࡟ࠊࢺ࣮ࣞࢧ࣮㔞ࡢ 137Cs ࢆຍ࠼ࡓࡶࡢࢆ౑⏝ࡋࡓࠋ࢚࢔ࣟࢰࣝỿ╔ᐇ㦂࡛ࡣࠊኳ↛࢚࢔ࣟࢰࣝࡢ࣓࢖ࣥࡢ⤌ᡂ࡛࠶ࡿ Na2SO4, NaCl ࡜ࠊ⁐ᾮ࡜ࡢẚ㍑ᑐ㇟࡜ࡋ࡚
Cs2SO4, CsCl ࡟ࠊࢺ࣮ࣞࢧ࣮㔞ࡢ 137Cs ࢆຍ࠼ࡓࡶࡢࢆ౑⏝ࡋࡓࠋ᳜≀ⴥࠊᖖ⥳ᗈⴥᶞࡢࢡࢫ
ࣀ࢟ࡢⴥࢆ౑⏝ࡋࡓࠋⴥ㠃࡬ࡢῧຍ᪉ἲ࡜ࡋ࡚ࠊ
⁐ᾮ࡟ࡘ࠸࡚ࡣࠊ0.2㹼0.3 mL ࡢヨᩱ⁐ᾮࢆࠊⴥࡢୖ࡟ 70㹼80 ⁲ࠊᆒ➼࡟ῧຍࡋࡓࠋ࢚࢔ࣟࢰࣝ
࡟ࡘ࠸࡚ࡣࠊࡇࢀࡲ࡛࡟㛤Ⓨࡋࡓ࢚࢔ࣟࢰࣝⓎ⏕⿦⨨[1]࡟ࡼࡾࠊྛ↓ᶵሷ࢚࢔ࣟࢰࣝࢆࠊⴥ㠃ୖ࡟ 2 mg ⛬ᗘࠊᆒ➼࡟྿ࡁ௜ࡅࡓࠋỿ╔ᚋ࠿ࡽ᭱኱㸯᪥ࡲ࡛ᨺ⨨ࡋࠊỈ࡟ࡼࡿ⁐㞳ࢆ⾜ࡗࡓࡢࡕࠊⴥ࡬ࡢṧ␃㔞ࢆࢤ࣐ࣝࢽ࣒༙࢘ᑟయ᳨ฟ࡟
ࡼࡾᐃ㔞ࡋࡓࠋ137Cs ࡢ྾཰⋡ࡣࠊῧຍࡋࡓᨺᑕ
⬟㔞࡜ࠊ⁐ฟࡉࢀࡓ㔞ࢆẚ㍑ࡋ࡚ồࡵࡓࠋ◲㓟ሷ⁐ᾮ࡟࠾ࡅࡿỿ╔ᐇ㦂ࡢ⤖ᯝࢆᅗ࡟♧ࡍࠋᅗࠊ⁐ᾮᐇ㦂ࡢ྾཰⋡ࡢ᫬㛫౫Ꮡ
Na2SO4,Cs2SO4 ⁐ᾮࢆ⏝࠸ࡓᐇ㦂࡛ࡣࠊỿ╔ᚋ࠿ࡽ 1㸫4 ᫬㛫࡛ࡣ 137Cs ࡢ྾཰ࡣㄆࡵࡽࢀ࡞࠿ࡗࡓࠋ8㸫24 ᫬㛫࡛ࡣࠊ᭱኱ 20% ࡯࡝ࡢ 137Cs ࡢṧ␃ࡀ☜ㄆ࡛ࡁࡓࠋ
ⴥ㠃ୖࡢ⁐ᾮࡣῧຍ࠿ࡽ 2 ᫬㛫ᚋ࡟⵨Ⓨࡋࡓࡇ࡜࠿ࡽࠊ
⁐ᾮࡢ⤌ᡂ࡛ࡣ 137Cs
ࡣⴥෆ࡟ධࡽࡎỈ࡟ࡼࡾ⁐ฟࡉࢀࡿࡀࠊ⵨Ⓨࡋ࡚ᅛయ࡟࡞ࡗ࡚࠿ࡽࡣࠊ⁐ฟࡉࢀ࡞࠸ᡂศࡀ
࠶ࡿ࡜⪃࠼ࡽ࠼ࡿࠋヲ⣽ࡣⓎ⾲࡟࡚ሗ࿌ࡍࡿࠋ
[1] ➨㸯㸵ᅇࠕ⎔ቃᨺᑕ⬟ࠖ◊✲఍ࠊⲈᇛ┴ 㧗࢚ࢿࣝࢠ࣮ຍ㏿ჾ◊✲ᶵᵓࠊ2016 ᖺ 3 ᭶

Study of depositing and eluting behaviors of radioactive materials discharged by severe nuclear
accident to forest vegetation
ZHANG Z., NINOMIYA K., YOSHIMURA T., HURUKAWA J., SHINOHARA A.

- 37 -

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%



&U ࡢ༙ῶᮇ⢭ᐦᐃᮾ໭኱㟁Ꮚගࢭ ࠊி኱⅔ ࠊ⌮◊ோ⛉ࢭ  ‫⳥ۑ‬Ọⱥᑑ ࠊ㧗ᐑᖾ୍ ࠊ኱ᵳ໅ ࠊ⩚ሙᏹග 䛆䛿䛨䜑䛻䛇㻌 㟁Ꮚᤕ⋓㐣⛬࡟ࡼࡿቯኚ㸦EC ቯኚ㸧࡛ࡣ㌶㐨㟁ᏊࡀཎᏊ᰾࡟ྲྀࡾ㎸ࡲࢀࡿࡓࡵ㸪໬Ꮫ≧ែ࡞࡝ࡢእⓗせᅉ࡟ࡼࡾࡑࡢቯኚ☜⋡㸦༙ῶᮇ㸧ࡣኚ໬ࡍࡿࠋෆẆ㟁Ꮚ࡯࡝ᤕ⋓☜⋡ࡀ㧗ࡃ࡞ࡿࡓࡵ➨ 2 ࿘ᮇඖ⣲ࡢ 7Be ࡛ࡣ໬Ꮫ≧ែࡢ㐪࠸࡟ࡼࡾẚ㍑ⓗ኱ࡁ࡞༙ῶᮇኚ໬ࢆ♧ࡋ㸪ከࡃࡢ◊✲౛ࡀሗ࿌ࡉࢀ࡚ࡁ࡚࠸ࡿ>@ࠋཎᏊ␒ྕࡀ኱ࡁࡃ࡞ࡿ࡟ࡘࢀ࡚ෆẆ㟁Ꮚࡀ໬Ꮫᙧࡢᙳ㡪ࢆཷࡅ࡟ࡃࡃ࡞ࡿࡀ㸪ከࡃࡢඖ⣲࡛༙ῶᮇኚ໬ࡀ᭷ព࡟ほ࡛ࡁࢀࡤ໬Ꮫᙧࢺ࣮ࣞ

ࢧ࣮࡜ࡋ࡚ࡢ฼⏝ࡶ⪃࠼ࡽࢀࡿࠋࡑࡇ࡛ᮏ◊✲࡛ࡣ➨ 4 ࿘ᮇඖ⣲࡛ᐃࡶẚ㍑ⓗᐜ᫆࡞ 48Cr

㸦T1/2㸸21.6 h㸧ࡢ༙ῶᮇࢆ⢭ᐦ࡟ᐃࡋ㸪໬Ꮫᙧ࡟ࡼࡾ࡝ࡢ⛬ᗘ༙ῶᮇࡀኚࢃࡿࡢ࠿ㄪ࡭ࡓ

ࡢ࡛ሗ࿌ࡍࡿࠋ
䛆ᐇ㦂䛇 ᮏ◊✲࡛ࡣ &U ,,, ࡢ໬Ꮫᙧ㸦>&U&O +2 @㸧࡜ &U 9, ࡢ໬Ꮫᙧ㸦>&U2@㸧࡛ &U ࡢ༙ῶᮇࢆ ᐃࡋࡓࠋ&U ࡣᮾ໭኱Ꮫࢧ࢖ࢡࣟࢺ࣭ࣟࣥࣛࢪ࢜࢔࢖ࢯࢺ࣮ࣉࢭࣥࢱ࣮ࡲࡓࡣ⌮໬Ꮫ◊✲ᡤࡢ $9) ࢧ࢖ࢡࣟࢺ࡛ࣟࣥ  0H9 ࡟ຍ㏿ࡉࢀࡓȘ⢏Ꮚࢆ⣙  SX$ ࡛  ᫬㛫௨ୖ㸪
7L 㔠ᒓ࡟↷ᑕࡍࡿࡇ࡜࡛〇㐀ࡋࡓࠋQDW7L D[Q ཯ᛂ࡛〇㐀ࡋࡓࢡ࣒ࣟྠ఩యࡣᏳᐃྠ఩యࢆᢸ
య࡜ࡋ࡚ຍ࠼࡚㸪ỿẊศ㞳ἲࡲࡓࡣࢡ࣌ࣟࣥࢆ⏝࠸ࡓ⁐፹ᢳฟἲ࡟ࡼࡗ࡚ࢱ࣮ࢤࢵࢺࡢࢳࢱ
ࣥ࡜⢒ศ㞳ࡋࡓࠋ᭱⤊ⓗ࡟㝜࢖࢜ࣥ஺᥮࣒࢝ࣛἲࢆ⏝࠸࡚⢭〇ࡋࡓࢡ࣒ࣟྠ఩యࡣ㸪࡯ࡰ➼ศ࡟ࡋ࡚ &U ,,, ࡢ⃰ሷ㓟⁐ᾮ࠾ࡼࡧ &U 9, ࡢỈ⁐ᾮࢆㄪᩚࡋࡓࠋ
ᐃࡣ௨๓ P7F ࡢ༙ῶᮇࢆ ᐃࡍࡿࡓࡵ࡟ไసࡋࡓ㧗ィᩘ⋡⁐ᾮヨᩱ ᐃ⏝ࡢ༙ῶᮇᐃ⿦⨨>@ࢆ⏝࠸ࡓࠋ&U ,,, ࠾ࡼࡧ &U 9, ࡢヨᩱ⁐ᾮ⣙ P/ ࢆ࢞ࣛࢫࣂ࢖࢔ࣝ࡟ᑒධࡋ㸪㧗⣧ᗘ *H ༙ᑟయ᳨ฟჾ࡛  ศࡈ࡜࡟஺஫࡟఩⨨ࢆኚ࠼ ᐃࡋࡓࠋ ᐃࢹ࣮ࢱࡣ 5E ࿘Ἴᩘᶆ‽ჾ࡜ྠᮇࡋࡓࣇࣛࢵࢩࣗ $'& ࣮࣋ࢫࡢ 0&$ ࢆ⏝࠸࡚ࣜࢫࢺ࣮ࣔࢻ࡛グ㘓ࡋࡓࠋ&U ヨᩱ࡜࡜ࡶ࡟ &V ⥺※ࢆ ᐃࡋ㸪ࣆ࣮ࢡᙉᗘࢆẚ㍑ࡍࡿࡇ࡜࡟ࡼࡾࣃ࢖ࣝ࢔ࢵࣉ➼ࡢᙳ㡪ࢆ⿵ṇࡋࡓࠋ䛆⤖ᯝ䛇 ᬻᐃⓗ䛺⤖ᯝ䛷䛿䛒䜛䛜䠈&U 䛾  ౯䛾໬Ꮫᙧ>&U&O +2 @䛸  ౯䛾໬Ꮫᙧ>&U2@ࡢ༙ῶᮇ ᐃ⤖ᯝࡣࡑࢀࡒࢀ௨ୗࡢࡼ࠺࡟࡞ࡗࡓ㸦Q 㸧ࠋ
>&U&O +2 @㸸sK>&U2@㸸     sK༙ῶᮇࡢ㐪࠸ሼሺ‫ ݎܥ‬ଷା ሻ െ ሺ‫଺ ݎܥ‬ା ሻሽȀܶሺ‫ ݎܥ‬ଷା ሻࡣ   ࡛࠶ࡾ㸪ࡇࢀࡲ࡛ ᐃࡉࢀ࡚࠸ࡓ 
౯ &U&O ࡜  ౯ 1D&U2 ࡢ໬Ꮫᙧࢆᣢࡘ &U ࡢ༙ῶᮇኚ໬㔞   >@࡜ẚ㍑ࡋ࡚  ಸ⛬ᗘ኱ࡁ࡞್࡜࡞ࡗࡓࠋ௒ᚋࡣ &U ࡢ໬Ꮫศ㞳཰⋡ᨵၿࡸᐇ㦂෌⌧ᛶࡢ☜ㄆ࡞࡝ࢆ⾜࠺࡜࡜ࡶ࡟㸪㔞Ꮚ໬Ꮫィ⟬⤖ᯝ➼࡜ẚ㍑ࡋ࡚࡝ࡢ⛬ᗘ໬Ꮫᙧࢺ࣮ࣞࢧ࣮࡜ࡋ࡚᭷⏝࠿᳨ウࡍࡿணᐃ࡛࠶ࡿࠋ䛆ཧ⪃ᩥ⊩䛇 >@72KWVXNLHWDO3K\V5HY/HWW  >@ ⳥Ọ௚㸪 ᪥ᮏᨺᑕ໬Ꮫ఍ᖺ఍$>@6.DNLXFKLDQG70XNR\DPD%XOO,QVW&KHP5HV.\RWR8QLY  
Precise measurement of the half-life of 48Cr.,.81$*$+7$.$0,<$.2+768.,7+$%$+- 38 -



1B02

཯㊴᰾ᤕ㞟ࡋࠊ໬Ꮫㄪ〇ࡋࡓ 229mTh ヨᩱࡢගᏊᐃ㜰኱㝔⌮ ࠊி኱⅔ ࠊᮾ໭኱㔠◊࣭኱Ὑ  ‫ۑ‬Ᏻ⏣ຬ㍤ ࠊ➟ᯇⰋᓫ ࠊ㔜Ἑඃ኱ ࠊ㧘ᐑᖾ୍ ࠊ኱ᵳ໅ ࠊ୕㢌⫄᫂ ࠊ⠛ཎཌ 䛆⥴ゝ䛇㻌 229Th ࡜࠸࠺᰾✀࡟ࡣ 7.8 r 0.5 eV ࡜࠸࠺㠀ᖖ࡟ప࠸ບ㉳࢚ࢿࣝࢠ࣮ࢆᣢࡘ᰾␗ᛶయ
229m

Th ࡀᏑᅾࡋ[1]ࠊࡇࡢ್ࡣග࡛ࡣἼ㛗 160 nm ࡢ┿✵⣸እග࡟┦ᙜࡍࡿࠋࡇࡢ᰾␗ᛶయࡣ໬

Ꮫ≧ែ࡟ࡼࡗ࡚ቯኚ⤒㊰㸦ෆ㒊㌿᥮ࡶࡋࡃࡣ γ ⥺㑄⛣㸧ࡑࡢࡶࡢࡀኚ໬ࡍࡿ࡜࠸࠺㠀ᖖ࡟⯆࿡῝࠸⌧㇟ࡀண ࡉࢀ࡚࠾ࡾࠊᐇ㝿࡟ෆ㒊㌿᥮㟁Ꮚ࡟ගᏊ㸦γ ⥺㸧ࡢほ

ᐃ࡟ࡼࡿほ ࡀ᭱㏆ሗ࿌ࡉࢀࡓ[2]ࠋ᭦

࡟ᡂຌࡍࢀࡤࠊ໬Ꮫ≧ែ࡟ࡼࡿ᰾ቯኚࡢኚ໬ࢆࡼࡾ┤᥋ⓗ࡟ド᫂ࡍࡿࡇ࡜ࡀ࡛ࡁࡿࠋࡇࢀࡲ࡛ගᏊ

ᐃ࡟㛵ࡋ࡚ࡣࠊMgF2 ࢞ࣛࢫ࡟ 229mTh ࢆᡴࡕ㎸ࢇࡔヨᩱ࠿ࡽ༙ῶ

ᮇ⣙ 6 h ࡢ 229mTh ࡢගᏊࢆほࡋࡓ࡜࠸࠺ሗ࿌ࡀ࠶ࡿࡀ[3]ࠊࡇࡢගᏊࡢ⏤᮶࡜ࡋ࡚ፉ᰾✀ࡢቯኚ࡟ࡼࡗ࡚Ⓨ⏕ࡋࡓࢳ࢙ࣞࣥࢥࣇග࡛࠶ࡿྍ⬟ᛶࡶᣦ᦬ࡉࢀ࡚࠸ࡿࠋ
ᮏ◊✲࡛ࡣගᏊ ᐃ࡟ࡼࡗ࡚ 229mTh ࡢ⬺ບ㉳㐣⛬ࡢ໬Ꮫ≧ែ౫Ꮡᛶࢆほ ࡋࠊ229mTh ࡢቯኚ㐣⛬ࢆゎ᫂ࡍࡿࡇ࡜ࢆ┠ⓗ࡜ࡋ࡚࠸ࡿࠋ௒ᅇࡣࠊ཯㊴᰾ᤕ㞟⿦⨨[4]࡜ 233U ࡢ㟁╔ヨᩱࢆస〇ࡋ࡚ 229mTh ࢆ MgF2 ࢞ࣛࢫ─୰ࡸ㔠ᒓ⾲㠃࡟ᤕ㞟ࡋࡓヨᩱࢆㄪ〇ࡋࠊගᏊᐃࢆ⾜ࡗࡓࡢ

࡛ࡑࡢ⤖ᯝ࡟ࡘ࠸࡚ሗ࿌ࡍࡿࠋ
࠙ᐇ㦂䞉⤖ᯝࠚ229mTh ࡣぶ᰾✀࡛࠶ࡿ 233U ࡢ α ቯኚ᫬࡟཯㊴᰾࡜ࡋ࡚ᚓࡽࢀࠊ㣕ࡧฟࡋࡓ 229mTh
ࢆᤕ㞟ࡍࡿࡇ࡜࡛ぶ᰾✀࠿ࡽศ㞳ࡍࡿࡇ࡜ࡀ࡛ࡁࡿࠋࡇࡢࡓࡵ࡟ⷧ࠸ 233U 㟁╔ヨᩱ㸦17.8 ± 0.3
μg/cm2 㸧ࢆㄪ〇ࡋࠊ཯㊴᰾ᤕ㞟⿦⨨ࢆ⏝࠸࡚ࠊ┿✵᮲௳ୗ࡛ MgF2 ࢞ࣛࢫ୰࡟ 229mTh ࢆᡴࡕ㎸ࡳࠊග㟁Ꮚቑಸ⟶ࢆ⏝࠸࡚ 4-10 eV ࡢ⠊ᅖ࡛ගᏊᐃࢆ⾜ࡗࡓࠋࡇࡢ㝿ࠊᤕ㞟᫬㛫ࢆኚ໬ࡉࡏ࡚」ᩘࡢヨᩱࢆㄪ〇ࡋࡓࠋࡲࡓࠊ228Th ỿẊࢆ⏝࠸࡚ྠᵝࡢ᪉ἲ࡛ፉ᰾✀㸦224Ra㸧➼ࢆᤕ㞟ࡋࠊ233U ヨᩱ࡟୙⣧≀࡜ࡋ࡚ྵࡲࢀࡿ 232U ⣔ิ᰾✀࠿ࡽⓎ⏕ࡍࡿගᏊ࡟ࡘ࠸࡚ࡶ

ᐃࢆ⾜ࡗࡓࠋMgF2 ࢞ࣛࢫ─୰࡟ 229mTh ࢆᡴࡕ㎸ࢇࡔヨᩱ࠿ࡽࡣඛ⾜◊✲࡜ྠᵝ࡟ගᏊᨺฟࡢῶ⾶ࡀほࡉࢀࡓࡀࠊࡇࢀࡽࡣ」ᩘࡢ༙ῶᮇᡂศࢆྵࡴࡇ࡜ࡀศ࠿ࡗࡓࠋࡲࡓࠊ228Th ỿẊࢆ⏝࠸࡚ㄪ〇ࡋࡓヨᩱ࠿ࡽࡶῶ⾶ࡍࡿගᏊᨺฟᡂศࡀほ ࡉࢀࡓࠋࡇࢀࡽࡢ⤖ᯝ࠿ࡽࠊMgF2 ヨᩱ࠿ࡽ3ࡢගᏊࡣፉ᰾✀ࡢቯኚ࡟ࡼࡗ࡚Ⓨ⏕ࡋࡓࡶࡢ࡛࠶

MgF 2 sampleࡇ࡜࡟ࡼࡾࠊ໬Ꮫ཯ᛂࢆࡉࡏࡓ 229mTh ヨᩱ࡟ࡘ࠸࡚ࡶㄪ〇ࡋࠊගᏊ

ᐃࢆ⾜ࡗࡓࡢ࡛ࠊⓎ⾲࡛ࡣࡇࢀࡽ

ࡢヨᩱ࡟ࡘ࠸࡚ࡢ⤖ᯝࡶྜࢃࡏ࡚ሗ࿌ࡍࡿࠋ

Count rate [cps]ࡿ࡜⪃࠼ࡽࢀࡿࠋࡲࡓࠊ࢞ࢫ୰࡛཯㊴᰾ࢆᤕ㞟ࡍࡿ21[1] B. R. Beck et al., LLNL-PROC-415170 (2009).
[2] L. von der Wense et al., Nature 533, 47 (2016).
[3] X. Zhao et al., Phys. Rev. Lett. 109, 160801 (2012).
[4] Y. Shigekawa et al., Rev. Sci. Instrum. 87, 053508 (2016).

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0

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Time [s]56[u105]

ᅗ 229mTh ࢆᤕ㞟ࡋࡓ MgF2 ヨᩱ࠿ࡽࡢගᏊ ᐃ⤖ᯝ
Search for the photons from the low-lying isomer
Th collected as recoil products.
YASUDA, Y., KASAMATSU, Y., SHIGEKAWA, Y., TAKAMIYA, K., OHTSUKI, T.,
MITSUGASHIRA, T., SHINOHARA, A.
229m- 39 -



1B03

80 MeV ༢Ⰽ୰ᛶᏊ࡟ࡼࡿ㝹▼ᵓᡂඖ⣲࡟ᑐࡍࡿ᰾཯ᛂ᩿㠃✚ࡢᐃ㜰኱㝔⌮ ࠊி኱⅔ ࠊ㜰኱ 5&13ࠊ.(.ࠊ-$($ࠊ⌮◊ ࠊࣃࢹ࣮ࣗ኱ ࠊ࢝ࣜࣇ࢛ࣝࢽ࢔኱  ‫ۑ‬༡㒊᫂ᘯ ࠊ஧ᐑ࿴ᙪ ࠊ㔜Ἑඃ኱ ࠊ㧗ᶫᡂே ࠊ⠛ཎཌ ࠊ㛵ᮏಇ ࠊඵᓥᾈ ࠊ
ᔱ㐩ᚿ ࠊ
ⴗཎ㞞அ ࠊ
ᒾඖὒ௓ ࠊ
ᰘ⏣ㄔ୍ ࠊ
0DUF:&DIIHHࠊ
すἨ㑥ᙪ 

㻌䛆ᗎㄽ䛇 㧗࢚ࢿࣝࢠ࣮Ᏹᐂ⥺࡟ࡼࡿ᰾཯ᛂ࡛⏕ࡌࡿࠊᏳᐃ᰾✀ࡸ㛗ᑑ࿨᰾✀ࡢ⏕ᡂࡣࠊᏱᐂ໬
Ꮫ࡟࠾࠸࡚㔜せ࡞▱ぢࢆࡶࡓࡍࠋ౛࠼ࡤࡇࢀࡽࡢ⏕ᡂ㔞࠿ࡽ㝹▼࡟ᑐࡍࡿᏱᐂ⥺↷ᑕᒚṔࡢ᥎ ࡀ࡞ࡉࢀ࡚࠸ࡿࠋࡇࡢ཯ᛂ࡟࠾࠸࡚ࡣࠊ2 ḟⓗ࡟Ⓨ⏕ࡋࡓ㧗࢚ࢿࣝࢠ࣮୰ᛶᏊࡀ㔜せ࡞ᐤ୚ࢆࡋ࡚࠾ࡾࠊࡇ࠺ࡋࡓ◊✲ࢆ㐍ࡵࡿୖ࡛ࡣ᰾཯ᛂ᩿㠃✚ࡢ್ࡀᚲせ࡛࠶ࡿࠋࡋ࠿ࡋᐇ㦂ⓗ࡞ᅔ㞴࠿ࡽࠊ50 MeV ௨ୖࡢ㧗࢚ࢿࣝࢠ࣮୰ᛶᏊ࡟ࡼࡿ᰾཯ᛂ᩿㠃✚ࡢᐇ㦂್ࡣ୙㊊ࡋ࡚࠸ࡿࠋࡑࡇ࡛ᮏ◊✲࡛ࡣࠊ୰ᛶᏊࢆ␗࡞ࡿ 2 ࡘࡢ᪉ྥ࡛฼⏝ࡍࡿᡭἲ[1][2]࡛ 80 MeV ༢Ⰽ୰ᛶᏊ࡟ࡼࡿ᰾཯ᛂ᩿㠃✚ࢆᐇ㦂ⓗ࡟Ỵᐃࡋࠊࡲࡓࡇࡢ್ࢆᩥ⊩್࡞࡝࡜ẚ㍑ࡍࡿࡇ࡜࡛ࠊ80
MeV ୰ᛶᏊ࡟ࡼࡿ᰾཯ᛂࡢ≉ᚩࢆ᫂ࡽ࠿࡟ࡋࡓࡢ࡛ሗ࿌ࡍࡿࠋ
䛆ᐇ㦂䛇 ኱㜰኱Ꮫ᰾≀⌮◊✲ࢭࣥࢱ࣮୰ᛶᏊᐇ㦂ᐊ࡟࡚ 80 MeV 㝧Ꮚ࡟ࡼࡿ Li(p,n)཯ᛂ࡛⏕ࡌࡓ୰ᛶᏊࡢ࢚ࢿࣝࢠ࣮ศᕸࢆ TOF ἲ࡟ࡼࡾ ᐃࡋࡓࠋ㝧Ꮚධᑕ᪉ྥ࠿ࡽ 0°࡜ 25°ࡢ᪉ྥ࡛㣕᮶ࡍࡿ୰ᛶᏊࡢ࢚ࢿࣝࢠ࣮ศᕸ࡟㐪࠸ࡀ࠶ࡿࡇ࡜ࢆ฼⏝ࡋࠊ0°ࡢࢫ࣌ࢡࢺࣝ࠿ࡽ 25°ࡢࢫ࣌ࢡࢺࣝࢆῶ⟬ࡍࡿࡇ࡜࡛ 80 MeV ༢Ⰽࡢ୰ᛶᏊᡂศࡢࡳࢆᨃఝⓗ࡟ྲྀࡾฟࡍࡇ࡜ࡀ࡛ࡁࡓࠋ㝹▼ᵓᡂඖ⣲࡛࠶ࡿ 10 ✀ࡢඖ⣲(C, N, O, Mg, Al, Si, K, Ca, Fe, Ni)ࡢ༢యࡶࡋࡃࡣ໬ྜ≀࡟ᑐࡋ࡚୰ᛶᏊࢆ↷ᑕࡋࡓࠋ↷ᑕ⤊஢ᚋ࡟ヨᩱ୰ࡢ᰾཯ᛂ⏕ᡂ᰾ࢆ Ge ᳨ฟჾ࡟ࡼࡿ γ ⥺ ᐃ࡛ྠᐃ࣭ᐃ㔞ࡋࡓࠋ0°↷ᑕヨᩱࡢ཰㔞࠿ࡽ 25°↷ᑕヨᩱࡢ཰㔞ࢆᕪࡋᘬࡃࡇ࡜࡛ࠊ80 MeV ༢Ⰽ୰ᛶᏊ࡟ࡼࡿ᰾཯ᛂ᩿㠃✚ࢆ 55 ࡢ᰾཯ᛂ࡟ࡘ࠸࡚Ỵᐃࡋࡓࠋ䛆⤖ᯝ䛸⪃ᐹ䛇Ni ᶆⓗ࡟ᑐࡍࡿ Co ྠ఩యࡢ᰾཯ᛂ
᩿㠃✚ࢆᅗ 1 ࡟♧ࡍࠋྠ࢚ࢿࣝࢠ࣮࡟࠾ࡅࡿ㝧Ꮚ࡟ࡼࡿ᰾཯ᛂ[3][4]࡜ẚ㍑ࡍࡿ࡜ࠊ㉁㔞ᩘࡢ኱ࡁ࡞᰾ࢆ⏕ࡌࡿ཯ᛂ࡛ࡣ୰ᛶᏊ࡟ࡼࡿ᰾཯ᛂ᩿㠃✚ࡢ᪉ࡀ኱ࡁࡃࠊධᑕ⢏Ꮚ࡟ࡼࡗ࡚཯ᛂᛶ࡟㐪࠸ࡀ࠶ࡿࡇ࡜ࡀࢃ࠿ࡗࡓࠋ᩿㠃✚ࡢධᑕ⢏Ꮚ౫Ꮡࡣ௚ࡢ᰾཯ᛂ࡟࠾࠸࡚ࡶぢࡽࢀࡓࠋ᰾཯ᛂ࡟㛵ࡍࡿࡇࢀࡽࡢ≉ᚩ࡟ࡘ࠸࡚ࠊⓎ⾲࡛ࡣᮏ◊✲ࢢ࣮ࣝࣉࡀᐇ᪋ࡋ࡚ࡁࡓࡼࡾ㧗࢚ࢿࣝࢠ࣮㡿ᇦ࡛ࡢᐇ㦂⤖ᯝࡶྵࡵ࡚ヲ⣽࡞㆟ㄽࢆ⾜࠺ࠋᅗ 1 Ni ࠿ࡽ⏕ࡌࡓ Co ྠ఩యࡢ཰㔞ศᕸ䛆ཧ⪃ᩥ⊩䛇
[1]J. M. Sisterson et al., Nucl. Inst. Meth. B, 240 (2005) 617-624[2]K. NINOMIYA et al., Proc. Radiochim. Acta, 1 (2011) 123-126[3]R. Stueck, INIS, 1 (1983)[4]Y. E. Titarenko et al., Phys. At. Nucl., 74 (2011) 573
Cross Sections for Cosmochemically Important Elements bombarded with 80 MeV
Monoenergetic Neutrons
NANBU, A., NINOMIYA, K., SHIGEKAWA, Y., TAKAHASHI, N., SHINOHARA, A.,
SEKIMOTO, S., YASHIMA, H., SHIMA, T., HAGIWARA, M., IWAMOTO, Y., SHIBATA, S., M.,
W., CAFFEE, NISHIIZUMI, K.

- 40 -

1B04

70

Zn(d,αn)67Cu ཯ᛂࡼࡿ㡺ᕸ⏝⢭〇 67Cu ࡢ〇㐀㸦⌮◊ோ⛉ࢭ 1㸪RI ༠఍ 2㸧‫▮ۑ‬⣡ៅஓ 1㸪⩚ሙᏹග 1㸪ᰘ⏣ㄔ୍ 1㸪ᑠ᳃᭷ᕼᏊ 1㸪㧗ᶫ࿴ஓ 1㸪Ώ㑓៞Ꮚ 1㸪⬥㇂㞝୍㑻 2㸪ᒣ⏣⚅⿱ 2㸪ᯇᮏᖿ㞝 2࠙⥴ゝࠚᡃࠎࡢ◊✲ࢢ࣮ࣝࣉ࡛ࡣ㸪ᑗ᮶デ᩿࣭἞⒪⏝ RI ࡜ࡋ࡚ᮇᚅࡉࢀ࡚࠸ࡿ 67Cu㸦T1/2 = 61.83
h, Iβ- = 100%㸧ࢆᅜෆ฼⏝⪅࡟㡺ᕸࡍࡿࡓࡵ㸪⌮◊ AVF ࢧ࢖ࢡࣟࢺࣟࣥ㸦AVF㸧ࢆ⏝࠸࡚㸪
70
Zn(d,αn)67Cu ཯ᛂ࡟ࡼࡿ⢭〇 67Cu ࡢ〇㐀ᢏ⾡㛤Ⓨࢆ㐍ࡵ࡚࠸ࡿ[1]㸬᫖ᖺᗘࡲ࡛࡟㸪natZn(d,X)཯ᛂ࡛〇㐀ࡋࡓ 61Cu㸪69mZn㸪66Ga ࡢᨺᑕᛶࢺ࣮ࣞࢧ࣮ࢆ⏝࠸࡚㸪67Cu ࡢ໬Ꮫ⢭〇ࢫ࣮࣒࢟ࢆ
☜❧ࡋ㸪Cu ࡢ໬Ꮫ཰⋡㸪Zn ᶆⓗࡸ๪཯ᛂ⏕ᡂ≀࡛࠶ࡿ Ga ྠ఩యࡢ㝖ᰁಀᩘ࡞࡝ࢆホ౯ࡋࡓ[1]㸬ࡲࡓ㸪㧗⃰⦰ 70Zn ྠ఩యᶆⓗࢆ⏝࠸࡚ 67Cu ࡢヨ㦂〇㐀ࢆ⾜࠸㸪67Cu ࡢ〇㐀཰⋡࡜ࡋ࡚㸪
4.0 MBq/μA∙h ࢆỴᐃࡋࡓ[1]㸬௒ᅇ㸪ձ᪤ሗ[1]ࡢ〇㐀ἲ࡟ᇶ࡙࠸࡚㸪⸆๣ᶆ㆑࡞࡝ࡢ◊✲࡟ᚲせ࡜ࡉࢀࡿ 100 MBq ࣮࢜ࢲ࣮ࡢ 67Cu ࡢ〇㐀ࢆヨࡳ㸪ᨺᑕᛶ᰾✀⣧ᗘ㸪ẚᨺᑕ⬟㸪୙⣧≀໬Ꮫඖ⣲⃰ᗘ࡞࡝ࡢရ㉁ホ౯ࢆ⾜ࡗࡓ㸬ࡉࡽ࡟㸪ղ↷ᑕᚋ㸪㧗౯࡞⃰⦰ 70Zn ᶆⓗࡢᅇ཰ἲࢆ᳨ウࡋࡓ㸬ࡲࡓ㸪ճᑗ᮶㸪GBq ࣮࢜ࢲ࣮ࡢ〇㐀࣭㡺ᕸࢆ┠ᣦࡋ㸪ᶆⓗࡢ෭༷ຠ⋡࡟ඃࢀࡓ᪂ࡋ࠸
↷ᑕࢩࢫࢸ࣒ࢆ㛤Ⓨࡋ㸪natZn 㔠ᒓᶆⓗ࡜ 10 μA ࡢ㔜㝧Ꮚࣅ࣮࣒ࢆ⏝࠸࡚↷ᑕヨ㦂ࢆ⾜ࡗࡓ㸬࠙ᐇ㦂ࠚձ24 MeV ࡟ຍ㏿ࡋࡓ㔜㝧Ꮚࣅ࣮࣒㸦ࣅ࣮࣒㟁ὶ: 4.0 μA㸧ࢆ 70ZnO㸦70Zn ྠ఩య⃰⦰
ᗘ: 96.87%; ཌࡉ: 340 mg/cm2㸧࡟ 10 ᫬㛫↷ᑕࡋ 67Cu ࢆ〇㐀ࡋࡓ㸬᪤ሗ[1]ࡢ໬Ꮫศ㞳ࢫ࣮࣒࢟࡟ࡼࡾ 67Cu ࡢ⢭〇ࢆ⾜࠸㸪Ge ᳨ฟჾࢆ⏝࠸ࡓ γ ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺ࣮ࣜ࡟ࡼࡾ⢭〇 67Cu ࡢᨺᑕ⬟࡜ᨺᑕᛶ᰾✀⣧ᗘࢆホ౯ࡋࡓ㸬ࡲࡓ㸪ICP-MS ࡟ࡼࡿ໬Ꮫඖ⣲ศᯒࢆ⾜࠸㸪⢭〇 67Cuࡢẚᨺᑕ⬟㸪୙⣧≀ඖ⣲⃰ᗘࢆホ౯ࡋࡓ㸬ղࡉࡽ࡟㸪↷ᑕ῭ࡳ 70Zn ᶆⓗヨᩱࢆሷ㓟⣔㝜࢖࢜ࣥ஺᥮ἲ࡟ࡼࡾ⢭〇ࡋ㸪Ỉ㓟໬≀࡜ࡋ࡚ỿẊศ㞳ࡋࡓᚋ㸪☢ᛶࡿࡘࡰෆ࡛ᙉ⇕ࡋ 70ZnO ࡟㌿᥮ࡋࡓ㸬ճHe ࢞ࢫ࡟ࡼࡿᶆⓗ෭༷ຠ⋡ࢆྥୖࡉࡏࡓ↷ᑕࢳࣕࣥࣂ࣮ࢆ᪂つ㛤Ⓨࡋ㸪24 MeV㸪
10 μA ࡢ㔜㝧Ꮚࣅ࣮࣒ࢆ㟁╔ἲ࡟ࡼࡾసᡂࡋࡓ⇕ఏᑟ⋡ࡀ㧗࠸㔠ᒓ natZn ᶆⓗ࡟ 20 ศ㛫↷ᑕࡋࡓ㸬↷ᑕ୰㸪ᶆⓗࢆ He㸦30 L/min㸧࡜Ỉ㸦1.5 L/min㸧࡟ࡼࡗ࡚෭༷ࡋࡓ㸬ࡉࡽ࡟㸪ࢳࣕࣥࣂ࣮ୖὶ࡟タ⨨ࡋࡓࣅ࣮࣒࢛࢘ࣈ࣮ࣛ࡟ࡼࡾࣅ࣮࣒㍈ࢆ 120 rpm ࡛┤ᚄ⣙ 3 mm ࡟ᅇ㌿ࡉࡏ㸪ᶆⓗࡢᒁᡤⓎ⇕ࢆศᩓࡉࡏࡓ㸬↷ᑕᚋ㸪ᶆⓗࡢ೺඲ᛶࢆ┠ど࡜㔜㔞ἲ࡟ࡼࡾ᳨ᰝࡋࡓ㸬ࡲࡓ㸪nat
Zn(d,X)67Ga ཯ᛂ࡟ࡼࡾ⏕ᡂࡋࡓ 67Ga ࡢ⏕ᡂᨺᑕ⬟ࢆồࡵ㸪᪤▱ࡢ཯ᛂ᩿㠃✚[2]ࡼࡾ⟬ฟࡋࡓᨺᑕ⬟್࡜ࡢẚ㍑࠿ࡽ㸪10 μA ࡢࣅ࣮࣒ᙉᗘ࡟ࡼࡿ 67Cu ࡢᐃ㔞ⓗ〇㐀ࡢྍ⬟ᛶࢆ᳨ウࡋࡓ㸬࠙⤖ᯝ࣭⪃ᐹࠚձ᪤ሗ[1]ࡢ〇㐀ἲࢆ⏝࠸࡚㸪135 MBq ࡢ⢭〇 67Cu ࢆ〇㐀ࡍࡿࡇ࡜ࡀ࡛ࡁࡓ㸬ᨺᑕᛶ᰾✀⣧ᗘࡣ㸪99.9%௨ୖ㸦↷ᑕᚋ 60 ᫬㛫࡛฼⏝ࡍࡿ࡜ࡋ࡚ホ౯㸧࡛࠶ࡗࡓ㸬〇㐀ࡋࡓ67
Cu ࡣ㸪ࡀࢇࡢデ᩿࣭἞⒪ࢆ┠ᣦࡋࡓ᪂つᢠయᶆ㆑⸆๣ࡢ㛤Ⓨ◊✲࡟ᛂ⏝ࡋࡓ[3]㸬ウㄽ఍࡛ࡣ㸪ICP-MS ࡟ࡼࡾホ౯ࡋࡓ⢭〇 67Cu ࡢẚᨺᑕ⬟ࡸ୙⣧≀ඖ⣲⃰ᗘ࡞࡝࡟ࡘ࠸࡚ࡶሗ࿌ࡍࡿ
ணᐃ࡛࠶ࡿ㸬ղ↷ᑕ῭ࡳ⃰⦰ 70Zn ヨᩱࡢᅇ཰⋡ࡣ㸪99%௨ୖ࡛࠶ࡗࡓ㸬๪཯ᛂ⏕ᡂ≀࡛࠶ࡿ㛗ᑑ࿨ 65Zn㸦T1/2 = 244.06 d㸧ࡢ⏕ᡂ⋡ࡣ㸪68 Bq/μA∙h ࡛࠶ࡾ㸪70Zn ᶆⓗࡢ෌฼⏝࡟࠾࠸࡚ 65Zn
ࡢṧ␃ᨺᑕ⬟ࡣ኱ࡁ࡞ၥ㢟࡟࡞ࡽ࡞࠸ࡇ࡜ࡀศ࠿ࡗࡓ㸬ճ᪂↷ᑕࢩࢫࢸ࣒ࡢヨ㦂࡟࠾࠸࡚ࡣ㸪↷ᑕᚋ࡟㔠ᒓ natZn ᶆⓗࡢ೺඲ᛶࢆ☜ㄆ࡛ࡁࡓ㸬67Ga ࡢ⏕ᡂᨺᑕ⬟ࡣ㸪↷ᑕᚋ㸪47.1 MBq ࡛㸪᪤▱ࡢ཯ᛂ᩿㠃✚[2]ࡼࡾண ࡉࢀࡿᨺᑕ⬟㸦46.6 MBq㸧࡟Ⰻࡃ୍⮴ࡋࡓ㸬௒ᚋ 70Zn 㔠ᒓᶆⓗࢆసᡂࡋ㸪10 μA ࡢ㔜㝧Ꮚࣅ࣮࣒࡟ࡼࡿ 67Cu ࡢ〇㐀ࢆ⾜࠺ணᐃ࡛࠶ࡿ㸬ࡲࡓ㸪ᑗ᮶㸪GBq ࣮࢜ࢲ࣮ࡢ 67Cu ࢆᐃᮇⓗ࡟㡺ᕸࡋ࡚࠸ࡃࡓࡵ㸪⮬ື໬Ꮫศ㞳⿦⨨ࡢ㛤Ⓨࡶ㐍ࡵ࡚࠸ࡿ㸬[1] ▮⣡ៅஓ࡯࠿, 2015 ᪥ᮏᨺᑕ໬Ꮫ఍ᖺ఍࣭➨ 59 ᅇᨺᑕ໬Ꮫウㄽ఍, 1B15, ௝ྎᕷ, 2015[2] Tarkanyi et al., Nucl. Instrum. Meth B. 217 (2004) 531-550.
[3] ⸨ᮌ຾ᑗ࡯࠿, ⚾ಙ.

- 41 -



1B05

50MeV 



ĩxmÈÃ 1ĚéÈÃ 2tYß>8BH 3Īß· 1Ç¾ 2iġN 2ðµ 2,3][ëV 2,3Ò£ 1¾`U 1ËXÎÆ 2ĤĖàú 2ÐĐ¹ 2èd 2öą  ÁsÞ±¥\^(RI)'T%ã$#%/Ĩ¦&ć´z(Ìâ}ü!
/*PáS!ęÞ0âÞRI "Ĩ6490/©'ć´ÞRI "

Yĩ64¸ĞĪ 299MoĩuÏ½66¸ĞĪ 2Ìć´LÌâ&Qµ%¤!/RI "

67Cuĩ12.7¸ĞĪ z( Cuĩ61.8¸ĞĪ2[1]íb%ĉ-0/ĨĒS¥2Þ~¨/W2æ¬

/oĒ

&½
!¡

éî2ē*40MeV&ęĠ"ÔôÅå2jÞäÝĨĒS¥%,/~¨«Í¼p!

/"2Ĉ[2.3]»đÝ¨Ě&º$/o2æ¬ęĠ6AH7M250MeV%O/"c%<M9=?Øč2Beě%/"!S¥äÝĚ2o/$#º$/°ý2ÿ¾äĀ!'¾«
Í%,/ČRI~¨&ÜÚ"lÝ¨Ø&ģ$#%

/ħ ĚéÈÃĨĚ¤Þéîª AVF :48J?JK%
oĒ 50 MeV ęĠĩ100 nAĪ2w 9mm & Be ě<M9=?% 3 ¸Ğ×Be(d,n){¤!äÝĨĒ
S¥2æå"/ RI &~¨%jÞS¥×Ě&G@<M" jÞ/ Nb ñ
%DI=?Ú&Óø 68Zn z( 90Zr ĘrØĊ³ĩ10mmó 300 mgĪ2­3!<M9=?
kµ&ïÊS%ėù×2ÿfv ×Ċ³2|.gĊ³&÷2Ñ/
"%, Ý¨Áì2LĚõÀ"û (n, d)z((n, pn){¤%,/ 67CuR(%(n, p){¤%,/ 90Y &~¨2êċ67Cu !'40MeV ęĠ"Ôô%,/~¨¿Z[3]"Éď 3.2 a%o/"1)äÝ/ĨĒS¥'(n, 4n){¤%,/lÝ¨Ø)!+-67Cu &~¨%'lÝ¨Ø&ģ'" +$0)!~¨{¤" jÞ0  68Zn(p,2p){¤$#"Éď Ù%<M9=?-&hĢ¸%ĥ"$/ 64Cu &Ý¨$ $#
ęĠ6AH7M2 50MeV %Ý¨Ěo&pÀlÝ¨Ø&ģ%q/"·-! /90Y &~¨!'(n, pn){¤%,/ 88YĩuÏ½ 106.6 ¶Ī&oă-0/$#Ĝ&lÝ¨Ø&ģ,.Ħþ%Ü0/"+190Y &~¨%ğ 'lÝ¨Ø2û§ęĠ×&»ĕ6AH7M%ğ/ÂĆº%¢Ă! / S¥%,/×'100ī2Ď/Ě&Ċ³×}ü!¼.)Ċ³&fv+¢Ă$ Ö#&, $r!&×+}ü! /&"'sâjÞ%Ě~¨ & &hĢLòā¯_%¼j$r~Ø2ç®×/"}ü! /$#Ä'¾éî%o ĨĒS¥×& Zn <M9$jÕû-0/67Cu &~¨%
=?2 5ī%º%ęĠCMF2 3A %oħ2ē*E5;2jÞ/^ehĄÑ%Ĕ2ĝsâjÞéî%¢Ă$Ě& RI ~¨%¨n
/

yû²Û
1) I. Novak-Hofer and PA. Schubiger: Eur. J. Nucl. Med. 29 (2002) 821.
2) Y. Nagai et al., J. Phys. Soc. Jpn. 82 (2013) 064201.
3) N. Sato et al., J. Phys. Soc. Jpn. 83 (2014) 073201.
Medical Radioisotope Production with Accelerator Neutrons by 50 MeV Deuterons
TSUKADA, K., HASHIMOTO, K., HATSUKAWA, Y., KAWABATA, M., SAEKI, H., Minato, F.,
IWAMOTO, N., NAGAI, Y., SUGO, Y., WATANABE, S. and ISHIOKA, N.

- 42 -

1B06

GARIS-II
"





 48Ca+238U→286Cn*v°{ ª{êÌ 

²ºT¼7 { d§{q 

k 

Êx}_  Î¨³  £Éð  &  |  ¹ÁPÐ¸L    ¦Y]yugÞcìÒÈ GARIS-II -´  B9:@DK6EIg 48Ca+238U
→286Cn* '³*g³¬-Ã !gÀ"³í½ pb 2K8K
 ) GARIS-II !ÄÚØï*# ï"ñ²ºæ/2IÇdár(RILAC)ÕÑbÀ" 1 i!
îÑé br Si br.H/-´ OÓïX-VM »
Target: 312 mg/cm2 238U3O8 on 3 μm Ti
Projectile: 48Ca11+ 251.8 MeV (from RILAC)
Intensity: 5.8×1012 ions/s (0.93 pμA)
Total dose: 2.2×1018
Magnetic rigidity: 2.23 Tm
Filled gas: pure He at 70 Pa

'(

'(

)-$./ & &.,-1#-,$,3'(&-70#7-.

046.01
046.0.

!046./4 .5-" -3. '7-2361( -.%. -0%0.43
.4//-,%,.'2( 
6,%-1
,%05
&,%-,

5%1/'.( ).$.3 & &.,-1#,-$,1'(&.7/#74

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5


 

.31

α 
55%018,%,1  --%4 
1%0
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

5%//'2(#4%50'3( 

6-%-
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6.%0
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

t 1 (a) (+SRÝ!zâç (b) ^Ñº¾!zâç[2-4] DSSD ID ¶j XJY ?47G
¶j Ï·¤µ(ER)!ãf1<G3K '#
α/SF !z1<G3Kzé-N*!
 ¢p 4.5  ,*>KC«!Å SRÝ!zâç-Ô©(tt 1) +(" ^Ñº¾ (Dubna-Livermore 5GKA[1,2] GSI SHIP 5GKA[3]) 3n gl~+*zâçl¡­-%%!  GARIS-II !àäe¯- 70%W~*³í½"s 3n= 2.0+2.7-1.3 pb * wo+ *³í½[1-3]¥ß* Ù ¿saLÍ *, U(
{³í½[-N*å`1<
G3KX!Ã-Ñ^Ñº¾! Ö-ÆÑQ~ * wo" B9:@DK6EIg * GARIS-II !Ë(hëe¯&=945F0I;)×Z-n$ (+z­  ÜÛ-* d \Âº¾ mÒÈè·!±®  %wo*!
[1] Yu. Ts. Oganessian et al., Phys. Rev. C 70, p.064609 (2004).
[2] Yu. Ts. Oganessian, J. Phys. G 34, p. R165 (2007).
[3] S. Hofmann et al., Eur. Phys. J. A32, p.251 (2007).
Study on hot fusion reaction of 48Ca+238U→286Cn* using GARIS-II
KAJI, D., MORIMOTO, K., HABA, H., WAKABAYASHI, Y., TAKEYAMA, M., YAMAKI, S.,
KOMORI, Y., YANO, S., GOTO, S.

- 43 -

1B07

103 ␒ඖ⣲࣮ࣟࣞࣥࢩ࣒࢘(Lr)ࡢࢱࣥࢱࣝ㔠ᒓ⾲㠃࡟࠾ࡅࡿ྾╔ᣲື(Ⲉᇛ኱ 1ࠊཎᏊຊᶵᵓ 2ࠊ᪂₲኱ 3ࠊᗈᓥ኱ 4ࠊྡྂᒇ኱ 5ࠊ኱㜰኱ 6ࠊᚨᓥ኱ 7ࠊ࣐࢖ࣥࢶ኱ 8ࠊHIM9ࠊGSI10ࠊPSI11ࠊ࣋ࣝࣥ኱ 12ࠊFLNR13)○㔠㇂భு 1,2ࠊబ⸨ဴஓ 2ࠊὸ஭㞞ே 2ࠊሯ⏣࿴᫂ 2ࠊ㇏ᔱཌྐ 2ࠊỈ㣫⛅⳯ 1,2ࠊ㛗᫂ᙪ 2ࠊ∾஭ᏹஅ 2ࠊすᑿ຾ஂ 2ࠊᘅ℩೺ኴ㑻 2ࠊỌ┠ㅍ୍㑻 1,2ࠊ෠ሯ▱༤ 3ࠊⓑ஭㤶㔛 3ࠊబ
⸨኱㍜ 3ࠊ኱Ụ୍ᘯ 3ࠊᚋ⸨┿୍ 3ࠊᐑୗ┤ 4ࠊ᪂ᐑ୍㥴 4ࠊྡ᱓Ⰻ 4ࠊᰘ⏣⌮ᑜ 5ࠊ㙊⏣⿱⏕ 5ࠊ➟ᯇⰋᓫ 6ࠊ㔜Ἑඃ኱ 6ࠊ㜰㛫⛱ 7ࠊCh. E. Düllmann8, 9,10ࠊK. Eberhardt8,9ࠊJ. Grund8ࠊJ. V. Kratz8ࠊ
J. Runke8ࠊP. Thörler-Pospiech8,9ࠊN. Trautmann8ࠊV. Pershina10ࠊM. Schädel10ࠊA. Yakushev9,10ࠊ
R. Eichler11,12ࠊP. Steinegger13
103 ␒ඖ⣲࣮ࣟࣞࣥࢩ࣒࢘(Lr)ࡣࠊᙉ࠸┦ᑐㄽຠᯝࡢᙳ㡪࡟ࡼࡾࠊࡑࡢ㟁Ꮚ㓄⨨ࡀ࿘ᮇ⾲࠿ࡽண᝿ࡉࢀࡿ [Rn]5f147s26d ࡛ࡣ࡞ࡃࠊ[Rn]5f147s27p1/2 ࡜࡞ࡿࡇ࡜ࡀ⌮ㄽⓗ࡟ண᝿ࡉࢀ࡚࠸
ࡿࠋLr ࡀ᭱እẆ㟁Ꮚ㌶㐨࡜ࡋ࡚ 7p1/2 ࢆᣢࡘሙྜࠊ༙⤒㦂ⓗ⪃ᐹ࡟ࡼࡿ࡜ࠊࡑࡢ᥹Ⓨᛶࡣ d㌶㐨࡟౯㟁Ꮚࢆᣢࡘࣝࢸࢳ࣒࢘(Lu)࡜ẚ࡭࡚㧗ࡃ࡞ࡿྍ⬟ᛶࡀᣦ᦬ࡉࢀ࡚࠸ࡿ [1]ࠋLr ࡣ㔜࢖࢜ࣥ᰾⼥ྜ཯ᛂ࡟ࡼࡗ࡚ྜᡂ࡛ࡁࡿࠋࡋ࠿ࡋᚓࡽࢀࡿྠ఩యࡣࡍ࡭࡚▷ᑑ࿨࡛࠶ࡾࠊ⏕ᡂ㔞ࡶᑡ࡞࠸ࡓࡵࠊࡑࡢ໬Ꮫⓗ࣭≀⌮ⓗᛶ㉁ࡣ࡯࡜ࢇ࡝▱ࡽࢀ࡚࠸࡞࠸ࠋᡃࠎࡣࡇࢀ
ࡲ࡛࡟ࠊ⾲㠃㟁㞳ἲࢆᛂ⏝ࡋ࡚ Lr ࡢ➨୍࢖࢜ࣥ໬࢚ࢿࣝࢠ࣮ࢆỴᐃࡋࠊLr ࡢ᭱እẆ㟁Ꮚ㌶
㐨ࡀ 7p1/2 ࡛࠶ࡿࡇ࡜ࢆ♧၀ࡍࡿ⤖ᯝࢆᚓࡓ[2]ࠋᮏ◊✲࡛ࡣࠊLr ཎᏊࡢ㔠ᒓ⾲㠃࡬ࡢ྾╔ᣲືࢆほ ࡍࡿࡇ࡜࡛ࠊLr ࡢ᥹Ⓨᛶ࡟ࡘ࠸᳨࡚ウࡋࡓࠋᐇ㦂ࡣཎᏊຊᶵᵓࢱࣥࢹ࣒ຍ㏿ჾ᪋タ࡛࠾ࡇ࡞ࡗࡓࠋ249Cf(11B, 4n)཯ᛂ࡟ࡼࡗ࡚ྜᡂࡋࡓ
256Lr(༙ῶᮇ 27 ⛊)ࢆࠊHe/CdI2 ࢞ࢫࢪ࢙ࢵࢺᦙ㏦ἲ࡟ࡼࡗ࡚࢜ࣥࣛ࢖ࣥྠ఩యศ㞳ჾ(ISOL)࡟⿦╔ࡋࡓ⾲㠃㟁㞳࢖࢜ࣥ※࡬࡜㎿㏿࡟ᦙ㏦ࡋࠊ࢖࢜ࣥ໬ࡋࡓࠋ⾲㠃㟁㞳࡟㛵ࢃࡿ࢖࢜ࣥ※⾲㠃࡜ࡋ࡚ࡣࢱࣥࢱࣝ(Ta)ࢆ⏝࠸ࡓࠋ࢖࢜ࣥ໬ࡋࡓ 256Lr ࢆ㉁㔞ศ㞳ᚋࠊᨺᑕ⥺ ᐃࢆ࠾ࡇ࡞
ୣ୶୮ࡗ࡚࢖࢜ࣥ໬ຠ⋡(‫ܫ‬ୣ୤୤ )ࢆỴᐃࡋࡓࠋ79Rbࠊ127Baࠊ128Csࠊ143Smࠊ142m,143Euࠊ148m,149Tbࠊ153,154mHoࠊ
157Erࠊ162Tmࠊ165Yb ཬࡧ 168 Lu ࡟ࡘ࠸࡚ࡶྠᵝ࡟‫ ܫ‬ୣ୶୮ ࢆㄪ࡭ࡓࠋᚓࡽࢀࡓ࢖࢜ࣥ໬ຠ⋡࡜ࠊୣ୤୤ୣ୶୮ ୡୟ୪ୡ
ୡୟ୪ୡ)࡜ࡢẚ㍑ࡢࡓࡵࠊ୧⪅ࡢẚ‫ ݎ‬ൌ ‫ܫ‬ୣ୤୤ Ȁ‫ܫ‬ୣ୤୤ࢆồࡵࡓࠋ྾╔ࡀ࡞࠸࡜௬ᐃࡋࡓሙྜࡢ᥎ᐃ್(‫ܫ‬ୣ୤୤࢖࢜ࣥ※ ᗘ⠊ᅖ 2690~2085 K ࡟࠾࠸࡚ࠊẚ r ࡢ ᗘ౫Ꮡᛶࢆྛྠ఩య࡟ࡘ࠸࡚ㄪ࡭ࡓࠋ
ࡑࡢ⤖ᯝࠊ256Lr ࡟ࡘ࠸࡚࢖࢜ࣥ※ ᗘࡢపୗ࡟కࡗ࡚ẚ r ࡢῶᑡࡀぢࡽࢀࡓࠋTa ⾲㠃࡟ᑐࡍࡿ྾╔࢚ࣥࢱࣝࣆ࣮ࡀ኱ࡁ࠸ Lu ࡸ Tb ࡛ࡶྠᵝࡢഴྥࡀぢࡽࢀࡓࡇ࡜࠿ࡽࠊ⾲㠃㟁㞳ࡢ㐣⛬࡛ࠊLr ࡢ୍㒊ࡀ࢖࢜ࣥ※⾲㠃࡬ࡢ྾╔࡟ࡼࡗ࡚ኻࢃࢀࡓ࡜⪃࠼ࡽࢀࡿࠋࡇࡢࡇ࡜࠿ࡽࠊ
Lr ࡣ Ta ⾲㠃࡟ᑐࡋ࡚ Lu ࡸ Tb ࡜ྠᵝ࡞྾╔ᛶࢆ♧ࡍࡇ࡜ࡀ♧၀ࡉࢀࡓࠋ
[1] B. Eichler et al., Inorg. Chim. Acta, 146, 261 (1988).
[2] T. K. Sato et al., Nature, 520, 209 (2015).

- 44 -



1B08㔜࢔ࢡࢳࣀ࢖ࢻඖ⣲ࡢ➨୍࢖࢜ࣥ໬࢚ࢿࣝࢠ࣮
(ཎᏊຊᶵᵓ 1ࠊⲈᇛ኱㝔 2ࠊᚨᓥ኱ 3ࠊ᪂₲኱ 4ࠊ኱㜰኱ 5ࠊ⌮◊ 6ࠊࣇ࣮ࣟࢽࣥ
ࢤࣥ኱ 7ࠊGSI8ࠊ࣐࢖ࣥࢶ኱ 9ࠊCERN10) ○బ⸨ဴஓ 1, ὸ஭㞞ே 1, 㔠㇂భு 1, 2,ሯ⏣࿴᫂ 1, ㇏ᔱཌྐ 1, Ỉ㣫⛅⳯ 1,2, Ṋ⏣᫴స 3, 㜰㛫⛱ 3, బ⸨኱㍜ 4, ኱Ụ୍ᘯ 4, 㔜 Ἑ ඃ ኱ 5, ∾ ஭ ᏹ அ 1, 㛗 ᫂ ᙪ 1, ᕷ ᕝ 㐍 ୍ 6, Ọ ┠ ㅍ ୍ 㑻 1, A.
Borschevsky7, M. Schadel1,8, Ch. E. Düllmann8,9, J. V. Kratz9, T. Stora10ཎᏊ␒ྕࡀ 100 ࢆ㉸࠼ࡿඖ⣲࡛ࡣࠊຍ㏿ჾࢆ⏝࠸ࡓ㔜࢖࢜ࣥ᰾཯ᛂ࡛ྜᡂࡉࢀࡿࡈࡃࢃࡎ
࠿࡞▷ᑑ࿨ྠ఩యࡋ࠿ྲྀࡾᢅ࠺ࡇ࡜ࡀ࡛ࡁ࡞࠸ࡓࡵࠊࡑࡢ໬Ꮫⓗᛶ㉁ࡣ࡯࡜ࢇ࡝▱ࡽࢀ࡚࠸࡞࠸ࠋࡑࡢ୍᪉࡛ࠊࡇࡢࡼ࠺࡞㔜࠸ඖ⣲ࡢ㡿ᇦ࡛ࡣࠊ୰ᚰ㟁Ⲵࡢቑ኱ࡢࡓࡵ࡟┦ᑐㄽຠᯝࡢ
ᙳ㡪ࡀ㢧ⴭ࡜࡞ࡾࠊ᭱እẆ㟁Ꮚ㌶㐨ࡲ࡛኱ࡁࡃᙳ㡪ࢆཷࡅࡿሙྜࡀ࠶ࡿࠋ➨୍࢖࢜ࣥ໬࢚ࢿ
ࣝࢠ࣮(IP1)ࡣࠊ᭱እẆ㟁Ꮚ㌶㐨࡟࠶ࡿ㟁Ꮚࡢ⤖ྜ࢚ࢿࣝࢠ࣮ࢆ཯ᫎࡍࡿࡓࡵࠊᐇ㦂ⓗ࡟ IP1
ࢆỴᐃࡍࡿࡇ࡜ࡀ࡛ࡁࢀࡤࠊᑐ㇟࡜ࡍࡿཎᏊࡢ㟁Ꮚ㌶㐨࡟㛵ࡍࡿ᝟ሗࡀᚓࡽࢀࡿࠋ
ࢃࢀࢃࢀࡣࡇࢀࡲ࡛࡟ࠊ
an atom-at-a-time ࡞ྲྀᢅ࠸ࡀồࡵࡽࢀࡿ㔜ඖ⣲㡿ᇦ࡟㐺⏝ྍ⬟࡞ IP1
Ỵᐃἲ࡜ࡋ࡚ࠊ⾲㠃㟁㞳㐣⛬ࢆᛂ⏝ࡋࡓᡭἲࢆ㛤Ⓨࡋࠊ࣮ࣟࣞࣥࢩ࣒࢘(Lr, Z = 103)ࡢ IP1ᐃ࡟ᡂຌࡋࡓ[1]ࠋᮏᡭἲࢆ⏝࠸࡚ࠊࣇ࢙࣑࣒ࣝ࢘(Fm, Z = 100)ࠊ࣓ࣥࢹࣞࣅ࣒࢘(Md, Z = 101)ࠊ
ࡑࡋ࡚ࣀ࣮࣒࣋ࣜ࢘(No, Z = 102)ࡢ IP1 ࢆ⣔⤫ⓗ࡟ ᐃࡋࡓ࡜ࡇࢁࠊFm ࠿ࡽ No ࡲ࡛ࠊࡦ࡜ࡘ
ࡎࡘ 5f ㌶㐨࡟㟁Ꮚࡀ඘ሸࡋ࡚࠸ࡃࡇ࡜ࠊࡉࡽ࡟ Lr ࡀ No ࡛᏶ᡂࡋࡓ‽㛢Ẇᵓ㐀࡟ຍ࠼࡚ࠊࡺ
ࡿࡃ᮰⦡ࡉࢀࡓ᭱እẆ㟁Ꮚࢆᣢࡘࡇ࡜ࢆࠊึࡵ࡚ᐇ㦂ⓗ࡟♧ࡍࡇ࡜ࡀ࡛ࡁࡓࠋ
ᐇ㦂ࡣཎᏊຊᶵᵓࢱࣥࢹ࣒ຍ㏿ჾᐇ㦂᪋タ࡛⾜ࡗࡓࠋᮏᐇ㦂⣔࡟࠾ࡅࡿ࢖࢜ࣥ໬ຠ⋡ࡢ IP౫Ꮡᛶࢆㄪ࡭ࡿࡓࡵࠊࢱࣥࢹ࣒ຍ㏿ჾ࠿ࡽࡢ 11B ࣅ࣮࣒࡟ࡼࡿ㔜࢖࢜ࣥ᰾཯ᛂ࡛⏕ᡂࡋࡓ 80Rb,
157
Er, 162Tm, 168Lu, 142,143Eu, 143mSm, 148Tb,153,154Ho, 165Yb ࠾ࡼࡧ 49Cr ࡟ࡘ࠸࡚ࠊྛྠ఩యࡢ⾲㠃㟁㞳㐣⛬࡟࠾ࡅࡿ࢖࢜ࣥ໬ຠ⋡ࢆ ᐃࡋࡓࠋ᰾཯ᛂ࡟ࡼࡾ⏕ᡂࡋࡓ᰾཯ᛂ⏕ᡂ≀ࡣࠊHe/CdI2 ࢞ࢫࢪ࢙ࢵࢺᦙ㏦ἲ࡟ࡼࡾࠊ㏿ࡸ࠿࡟࢜ࣥࣛ࢖ࣥྠ఩యศ㞳ჾ(JAEA-ISOL)࡟⿦╔ࡉࢀࡓ⾲㠃㟁㞳ᆺ࢖࢜ࣥ※࡬࡜ᦙ㏦ࡉࢀࡿࠋ࢖࢜ࣥ※ෆ࡛⾲㠃㟁㞳ࡉࢀࡓ᰾཯ᛂ⏕ᡂ≀ࡣࠊ࢖࢜ࣥࣅ࣮࣒
࡜ࡋ࡚ᘬࡁฟࡉࢀࠊ㉁㔞ศ㞳ࡉࢀࡿࠋ⾲㠃㟁㞳࡟࠿࠿ࢃࡿ⾲㠃࡟ࡣࢱࣥࢱࣝࢆ⏝࠸ࡓࠋ㉁㔞
ศ㞳࡟ࡼࡾ㑅ูࡋࡓ┠ⓗࡢྠ఩య࢖࢜ࣥࣅ࣮࣒ࢆ ISOL ᮎ➃࡛ᤕ㞟ࡋࠊᨺᑕ⥺ ᐃ࡟ࡼࡾ࢖࢜
ࣥ཰㔞ࢆỴᐃࡍࡿࠋ࢖࢜ࣥ໬ຠ⋡⟬ฟࡢࡓࡵࠊ࢞ࢫࢪ࢙ࢵࢺᦙ㏦ࡉࢀࡓ᰾཯ᛂ⏕ᡂ≀ࡢ┤᥋ᤕ㞟࣭ ᐃࡶ࠶ࢃࡏ࡚⾜ࡗࡓࠋ243Am(11B, 5n)཯ᛂ࡛⏕ᡂࡍࡿ 249Fm(༙ῶᮇ 2.6 ศ)࡞ࡽࡧ࡟
243
Am(12C, 4n)཯ᛂ࡟ࡼࡿ 251Md(༙ῶᮇ 4.27 ศ)ࠊ248Cm(13C, 4n)཯ᛂ࡟ࡼࡾ⏕ᡂࡍࡿ 257No (༙ῶᮇ 24.5 ⛊)ࢆ⏝࠸࡚ࠊྠ୍࢖࢜ࣥ໬᮲௳ୗ࡟࠾ࡅࡿྛྠ఩యࡢ࢖࢜ࣥ໬ຠ⋡ࢆ ᐃࡋࡓࠋࡇࢀࡽࡢ ᐃࡢ⤖ᯝᚓࡽࢀࡓ⣙ 5.5 㹼7 eV ࡢ⠊ᅖ࡛ IP1 Ỵᐃ࡟㐺⏝ྍ⬟࡞ IP1-࢖࢜ࣥ໬ຠ⋡┦㛵᭤⥺ࢆࡶ࡜࡟ࠊ249Fmࠊ251Md ࠾ࡼࡧ 257No ࡢ࢖࢜ࣥ໬ຠ⋡࠿ࡽࠊFmࠊMd ࠾ࡼࡧ No ࡢ IP1
ࢆồࡵࡓࠋᮏ◊✲࡛ᚓࡽࢀࡓᐇ㦂್࡜ࠊࡇࢀࡲ࡛࡟༙⤒㦂ⓗ࠾ࡼࡧ⌮ㄽィ⟬࡟ࡼࡾᚓࡽࢀࡓ
᥎ᐃ್࡜ࢆẚ㍑ࡋࡓ࡜ࡇࢁࠊࡼࡃ୍⮴ࡋࠊཎᏊ␒ྕࡀ㐍ࡴ࡟ࡘࢀ 5f ㌶㐨ࡀ඘ሸࡉࢀ࡚࠸ࡃᵝᏊࢆึࡵ࡚ᐇ㦂ⓗ࡟᫂ࡽ࠿࡟ࡍࡿࡇ࡜ࡀ࡛ࡁࡓࠋ
[1] T. K. Sato, et al., Nature, 520, 209 (2015).
The first ionization potentials of heavy actinide elements
SATO, T. K., ASAI, M., KANEYA, Y., TSUKADA, K., TOYOSHIMA, A., MITSUKAI A., TAKEDA,
S., SAKAMA, M., SATO, D., OOE, K., SHIGEKAWA, Y., MAKII, H., OSA, A., ICHIKAWA, S.,
NAGAME, Y., BORSCHEVSKY, A., SCHÄDEL, M., DÜLLMANN, Ch. E., KRATZ, J. V., STORA,T.

- 45 -

䢢

1B09

104 ␒ඖ⣲Rf 䛾ྠ᪘ඖ⣲Zr䠈Hf 䛾Aliquat 336/HCl ⣔䛷䛾⁐፹ᢳฟᣲື
(㜰኱㝔⌮1㸪㜰኱⌮2㸪⌮◊ோ⛉ࢭ3) ‫ۑ‬㏆⸨ᡂ⨾1㸪኱ෆ᫡㍤1㸪Ọ℩ᑗᾈ2㸪㔜Ἑඃ኱1㸪Ᏻ⏣ຬ㍤1㸪➟ᯇⰋᓫ1㸪⠛ཎ ཌ1㸪ᕤ⸨♸⏕3࠙⥴ゝࠚ㉸㔜ඖ⣲࡛࠶ࡿ 104 ␒ඖ⣲ࣛࢨ࣮࣍ࢪ࣒࢘(Rf)ࡣ㸪ຍ㏿ჾࢆ⏝࠸ࡓ㔜࢖࢜ࣥ᰾཯ᛂ࡛ࡢࡳ⏕ᡂࡉࢀࡿ㸬ࡑࡢ⏕ᡂ⋡ࡣపࡃ㸪▷ᑑ࿨࡛࠶ࡿࡇ࡜࠿ࡽ㸪Rf ࡢ໬Ꮫⓗᛶ㉁ࡢከࡃࡣ▱ࡽࢀ࡚࠸࡞࠸㸬ᡃࠎࡣඛ⾜◊✲࡟࡚㸪⮬ືᢳฟศ㞳⿦⨨ࢆ⏝࠸ࡓ Aliquat 336/HCl ⣔࡛ࡢ 104 ␒ඖ⣲ Rfࡢᅛᾮᢳฟᣲືࡢᖹ⾮฿㐩ࢆ┤᥋ほ ࡋ㸪ศ㓄ಀᩘࢆྲྀᚓࡍࡿࡇ࡜࡟ᡂຌࡋࡓ[1]㸬ࡑࡢ⤖ᯝ㸪Rf ࡣྠ᪘ඖ⣲࡛࠶ࡿ Zr ࡸ Hf ࡜ࡣ␗࡞ࡿศ㓄ಀᩘࢆ♧ࡋࡓ㸬ᮏᐇ㦂࡛ࡣ㸪Rf ࡢሷ໬≀㘒యࢆࡼࡾヲ⣽࡟ㄪ࡭ࡿࡇ࡜ࢆ┠ⓗ࡜ࡋ㸪ࡑࡢᇶ♏ᐇ㦂࡜ࡋ࡚ Zr ࠾ࡼࡧ Hf ࢆ⏝࠸ࡓࣂࢵࢳἲ࡟ࡼ
ࡿ⁐፹ᢳฟᐇ㦂ࢆ⾜࠸㸪ศ㓄ẚࡢᢳฟ๣⃰ᗘ౫Ꮡᛶ࡜ࡑࡢᕼ㔘๣౫Ꮡᛶࢆㄪ࡭㸪ᐇ㦂᮲௳࡟ࡼࡿሷ໬≀㘒యࡢ౯ᩘࡢኚ໬ࢆほ ࡋࡓ㸬ࡲࡓ㸪㔜ඖ⣲࡛ࡢ⁐፹ᢳฟ࡟㐺ࡋࡓࣇ࣮ࣟᘧᢳฟ
ศ㞳⿦⨨(FIA)[2]ࡢ㛤Ⓨࢆ㐍ࡵ㸪኱㜰኱Ꮫ᰾≀⌮◊✲ࢭࣥࢱ࣮(RCNP)ࡢ AVF ࢧ࢖ࢡࣟࢺࣟࣥ
ࢆ⏝࠸࡚ Rf ࡛ࡢᐇ㦂ࢆᶍᨃࡋࡓຍ㏿ჾ࢜ࣥࣛ࢖ࣥᐇ㦂ࢆ⾜ࡗࡓ㸬࠙ᐇ㦂࡜⤖ᯝࠚ
ᮏᐇ㦂࡛ࡣ㸪
ẚ㍑ⓗᖹ⾮฿㐩ࡢ㏿࠸㝜࢖࢜ࣥᢳฟ๣࡛࠶ࡿ Aliquat 336 ࢆ⏝࠸࡚㸪Ỉ┦࡟ 8-11
M ሷ㓟㸪᭷ᶵ┦࡟ࡣ CHCl3 ࡲࡓࡣ CCl4 ࢆ⏝࠸࡚⁐፹ᢳฟᐇ㦂ࢆ⾜ࡗࡓ㸬ࡲࡓ㸪88Zr (T1/2 = 83.4d) ࡜ 175Hf (T1/2 = 70 d)ࢆ RCNP ࡢ AVF ࢧ࢖ࢡࣟࢺࣟࣥ࡟࡚᰾཯ᛂ 89Y(p,2n) 88Zr ࡜
175

Lu(p,n)175Hf ࡟ࡼࡾ⏕ᡂࡋࡓ㸬ࣂࢵࢳἲ࡟࡚ࡇࢀࡽࢆ⏝࠸ࡓ⁐፹ᢳฟᐇ㦂ࢆ⾜࠸㸪Fig.1 ࡢࡼ࠺࡟ศ㓄ẚࡢᢳฟ๣⃰ᗘ౫Ꮡᛶࢆᚓࡓ㸬CHCl3 ࢆ⏝࠸ࡓࡇࡢᐇ㦂࡛ࡣࢢࣛࣇࡢഴࡁࡀ 1.9 ࡜࡞ࡗࡓࡇ࡜࠿ࡽ㸪Zr ࠾ࡼࡧ Hf ࡢᢳฟ໬Ꮫ✀ࡣ 2 ౯ࡢ㝜࢖࢜ࣥ㘒య࡛࠶ࡿࡇ࡜ࡀ♧၀ࡉࢀࡓ㸬ྠᵝࡢᐇ㦂ࢆ࠸ࡃࡘ࠿ࡢ᮲௳࡛⾜ࡗࡓ࡜ࡇࢁ㸪ሷ㓟⃰ᗘ࡟ࡼࡾᢳฟ๣⃰ᗘ౫Ꮡᛶࡢഴࡁ࡟ኚ໬ࡀぢࡽࢀࡓ㸬ࡲࡓ㸪CCl4 ࡜ 11.2 M ࡢሷ㓟ࢆ⏝࠸ࡓᐇ㦂࡛ࡣ㸪ഴࡁࡣ⣙ 1 ࡜࡞ࡗࡓࡇ࡜࠿ࡽ㸪⁐፹ࡢ㐪࠸࡟ࡼࡿᢳฟᣲືࡢኚ໬ࡀほ ࡉࢀࡓ㸬log[ D]ࡇࡢࡼ࠺࡞ሷ໬≀㘒ᙧᡂᣲືࢆ Rf ࡟ᑐࡋ࡚ㄪ࡭ࡿࡓࡵ࡟㸪㔜ඖ⣲࡛ࡢ⁐፹ᢳฟ࡟㐺ࡋࡓࣇ࣮ࣟᘧᢳฟศ㞳⿦⨨(FIA)ࡢ㛤Ⓨࢆ㐍ࡵ㸪FIA ࢆ⏝࠸ࡓ⁐፹ᢳฟᐇ㦂ࢆ⾜ࡗࡓ㸬ࡲࡎ㸪ࣂࢵࢳἲ࡛ࡢᐇ㦂࡜ྠᵝࡢ᮲௳࡛ FIA ࢆ⏝࠸࡚࢜ࣇࣛ࢖ࣥᢳฟᐇ㦂ࢆ⾜࠸㸪ࡑࡢᚋ RCNP ࡟࡚
89m
Zr(T1/2 = 4.18 m)࠾ࡼࡧ 173Hf(T1/2 = 23.4 h)ࢆྜᡂࡋ Rf ᐇ
2㦂ࢆᶍᨃࡋࡓ࢜ࣥࣛ࢖ࣥᐇ㦂ࢆ⾜ࡗࡓ㸬࢜ࣥࣛ࢖ࣥᐇ㦂࡛ࡣ㸪᰾཯ᛂ࡟ࡼࡗ࡚⏕ᡂࡋࡓ┠ⓗ᰾ࢆ He/KCl ࢚࢔ࣟ
1ࢰࣝ࢞ࢫࢪ࢙ࢵࢺ࡛ᐇ㦂ᐊࡲ࡛㐠ᦙࡋࡓ㸬⁐ᾮ໬⿦⨨ࢆ⏝࠸࡚Ỉ┦࡟⁐ゎࡉࡏ㸪᭷ᶵ┦࡜ඹ࡟ FIA ࡟㏦ᾮࡍࡿࡇ
0
Zr(batch)࡜࡛㎿㏿࡟ᢳฟศ㞳ࢆ⾜ࡗࡓ㸬Fig.1 ࡟♧ࡍࡼ࠺࡟ 9-11.2
Hf(batch)Zr(FIA offline)
M HCl ࢆ⏝࠸ࡓ FIA ᐇ㦂࡟࡚ᚓࡽࢀࡓศ㓄ẚࡣࣂࢵࢳἲ-1
Hf(FIA offline)
Zr(FIA online)ࢆ⏝࠸ࡓᐇ㦂࡛ᚓࡽࢀࡓ್࡜㏆࠸್࡛࠶ࡗࡓ㸬ࡇࡢࡇ࡜
Hf(FIA online)-2࠿ࡽ㸪FIA ࢆ Rf ᐇ㦂࡬㐺⏝࡛ࡁࡿࡇ࡜ࢆ☜ㄆ࡛ࡁࡓ㸬-3-2-1
log[Aliquat 336]
[1] ᶓ໭༟ஓ ௚㸪➨ 59 ᅇᨺᑕ໬Ꮫウㄽ఍ 1B06 (2015).
[2] ୰ᮧᏹᖹ㸪኱㜰኱Ꮫ⌮Ꮫ◊✲⛉㸪ಟኈㄽᩥ (2015).

Fig.1 CHCl3 - 11.2 M HCl ᢳฟᐇ㦂⤖ᯝLiquid-liquid extraction of Zr and Hf in Aliquat 336/HCl system for the extraction experiment of element 104,
Rf
KONDO, N., OUCHI, K., NAGASE, M., SHIGEKAWA, Y., YASUDA, Y., KASAMATSU, Y., SHINOHARA,
A., KUDOU, Y.

- 46 -

1B10

107 ␒ඖ⣲࣮࣒࣎ࣜ࢘ࡢ⁐ᾮ໬Ꮫ◊✲࡟ྥࡅࡓ GARIS ࢞ࢫࢪ࢙ࢵࢺ⿦
⨨࡟ࡼࡿ Re ྠ఩యࡢ〇㐀࡜ࣇ࣮ࣟ⁐፹ᢳฟჾࢆ⏝࠸ࡓ Re ࡢ࢜ࣥࣛ࢖
ࣥᢳฟ⌮◊ோ⛉ࢭ 1, ᪂₲኱㝔⮬↛ 2, ཎᏊຊᶵᵓ 3, ⟃Ἴ኱ᩘ⌮ 4, ᮾ໭኱㟁Ꮚගࢭ 5,኱㜰኱㝔⌮ 6, ࢜ࢫࣟ኱ 7 ‫ۑ‬ᑠ᳃᭷ᕼᏊ 1, ⩚ሙᏹග 1, ኱Ụ୍ᘯ 2, ㇏ᔱཌྐ 3, Ỉ㣫⛅⳯ 3,
బ⸨኱㍜ 2, ᮏᒣᮤἋ 2, ▮⣡ៅஓ 1, Ώ㑓៞Ꮚ 1, బ⸨ᮃ 1, ᒣᮌࡉࡸ࠿ 1, ⏣୰Ὀ㈗ 1,ຍ἞኱ဢ 1, ᳃ᮏᖾྖ 1, ᆏཱྀ⥤ 4, ✄ᇉ⣧ᖹ 4, ⳥Ọⱥᑑ 5, 㔜Ἑඃ኱ 6, ➟ᯇⰋᓫ 6,
Jon Petter Omtvedt 7㻌䛆⥴ゝ䛇 ᮏ◊✲ࢢ࣮ࣝࣉ࡛ࡣ㸪106 ␒ඖ⣲ Sg ࡞ࡽࡧ࡟ 107 ␒ඖ⣲ Bh ࡢ⁐ᾮ໬Ꮫ◊✲ࢆ┠ᣦࡋ㸪⌮◊ GARIS ࢞ࢫࢪ࢙ࢵࢺᦙ㏦⿦⨨࡟┤⤖ࡋࡓ㎿㏿⁐፹ᢳฟ⿦⨨ࡢ㛤Ⓨࢆ㐍ࡵ࡚࠸ࡿ[1]㸬௒ᅇ㸪Bh ࡢྠ᪘ඖ⣲࡛࠶ࡿ Re ࡢᨺᑕᛶྠ఩యࢆ⏝࠸࡚ᮏࢩࢫࢸ࣒ࡢᛶ⬟ヨ㦂ࢆ⾜࠺ࡓࡵ㸪ࡲࡎ
nat
Gd(23Na,xn)174Re ཯ᛂ࡟ࡼࡾ 174Re㸦T1/2 = 2.4 min㸧ࢆ〇㐀ࡋ㸪GARIS ࢞ࢫࢪ࢙ࢵࢺᦙ㏦⿦⨨ࢆ⏝࠸࡚ຠ⋡Ⰻࡃ໬Ꮫᐇ㦂ᐊ࡟ᘬࡁฟࡍᐇ㦂᮲௳ࢆ᥈⣴ࡋࡓ㸬ࡉࡽ࡟㸪GARIS ࢞ࢫࢪ࢙ࢵࢺ
ᦙ㏦⿦⨨࡟㐃⥆⁐ᾮ໬⿦⨨㸦MDG㸧࠾ࡼࡧࣇ࣮ࣟ⁐፹ᢳฟჾ㸦FSE㸧ࢆ⤖ྜࡋ㸪HNO3–ࢺࣜ࢜ࢡࢳࣝ࢔࣑ࣥ(TOA)/ࢺ࢚ࣝࣥ⣔࡟࠾ࡅࡿ 174Re ࡢ࢜ࣥࣛ࢖ࣥ⁐፹ᢳฟᐇ㦂ࢆ⾜ࡗࡓ㸬䛆 ᐇ 㦂 䛇 ⌮ ◊㔜 ࢖࢜ ࣥࣜ ࢽ ࢔ࢵ ࢡ ࡛ຍ ㏿ࡋࡓ 23Na7+ ࢖ ࢜ࣥ ࢆ natGd2O3 ᶆ ⓗ ࡟ ↷ ᑕࡋ 㸪
nat
Gd(23Na,xn)཯ᛂ࡟ࡼࡾ 174Re ࢆ〇㐀ࡋࡓ㸬ᶆⓗ୰ᚰ࡛ࡢࣅ࣮࣒࢚ࢿࣝࢠ࣮࠾ࡼࡧᙉᗘࡣࡑࢀ
ࡒࢀ 124.3 MeV, 1.6 particle μA ࡛࠶ࡗࡓ㸬GARIS ࡢ↔Ⅼ㠃࡟࢞ࢫࢪ࢙ࢵࢺࢳ࢙ࣥࣂ࣮㸦┤ᚄ
100 mm῝ࡉ 20 mm㸧ࢆタ⨨ࡋ㸪GARIS ࡛ศ㞳ࡉࢀࡓ 174Re ࢆ He ୰㸦~80 kPa㸧࡛ KCl ࢚࢔ࣟࢰࣝ࡟௜╔ࡉࡏ㸪He Ẽὶ㸦1.5 ࡲࡓࡣ 5 L/min㸧࡟ࡢࡏ࡚໬Ꮫᐇ㦂ᐊ࡟ᦙ㏦ࡋࡓ㸬ࡇࢀࢆࢢࣛࢫࣇ࢕ࣝࢱ࣮㸦ADVANTEC GB100R㸧࡟ᤕ㞟ࡋ㸪Ge ᳨ฟჾࢆ⏝࠸࡚ γ ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺࣜ
࣮ࢆ⾜࠸㸪174Re ࡢ཰⋡ࡀ᭱኱࡜࡞ࡿࡼ࠺ GARIS ࡢ☢ሙࢆ᭱㐺໬ࡋࡓ㸬ḟ࡟㸪GARIS ࢞ࢫࢪ
࢙ࢵࢺᦙ㏦⿦⨨࡟ MDG ࢆ⤖ྜࡋ㸪࢚࢔ࣟࢰࣝࢆ 0.5 M HNO3㸦1 mL/min㸧࡛㐃⥆ⓗ࡟⁐ゎࡋࡓᚋ㸪0.005–0.1 M TOA/ࢺ࢚ࣝࣥ㸦1 mL/min㸧࡜ΰྜࡉࡏ㸪FSE ࡢࢸࣇࣟࣥ࢟ࣕࣆ࣮ࣛࣜ㸦ෆ
ᚄ 0.50 mm㸧࡛ࣇ࣮ࣟ⁐፹ᢳฟࢆ⾜ࡗࡓ㸬FSE ࡢศ┦ჾ࡛┦ศ㞳ᚋ㸪୧┦ࡢᨺᑕ⬟ẚ࠿ࡽ 174Re
ࡢศ㓄ẚࢆồࡵࡓ㸬࢟ࣕࣆ࣮ࣛࣜࡢ㛗ࡉ࡜ TOA ⃰ᗘࢆ⣔⤫ⓗ࡟ኚ໬ࡉࡏ㸪174Re ࡢศ㓄ẚࢆᐃࡋࡓ㸬䛆⤖ᯝ䛸⪃ᐹ䛇 ໬Ꮫᐇ㦂ᐊ࡟࠾࠸࡚㸪174Re ࢆ 60 s 㛫ᤕ㞟ࡋࡓᚋࡢᨺᑕ⬟ࡣ 13 ± 1 kBq/particle
μA ࡛࠶ࡗࡓ㸬
0.5 M HNO3㸫0.01 M TOA/ࢺ࢚ࣝࣥࡢᢳฟ⣔࡟࠾ࡅࡿ 174Re ࡢศ㓄ẚࡣ㸪≥ 30 cm
ࡢ࢟ࣕࣆ࣮࡛ࣛࣜࣂࢵࢳᐇ㦂࠿ࡽồࡵࡓᢳฟᖹ⾮᫬ࡢศ㓄ẚ࡟୍⮴ࡋࡓ㸬⁐ᾮࡀ 30 cm ࡢ࢟ࣕࣆ࣮ࣛࣜࢆ㏻㐣ࡍࡿ᫬㛫ࡣ⣙ 1.8 s ࡜ィ⟬ࡉࢀ㸪ᮏᡭἲࡣ༙ῶᮇ 10 s ⛬ᗘࡢ 266Bh [2]ࡢ⁐፹ᢳฟᐇ㦂࡟㐺⏝࡛ࡁࡿ࡜⪃࠼ࡽࢀࡿ㸬ࡋ࠿ࡋ࡞ࡀࡽ㸪TOA ⃰ᗘࡀ≥ 0.05 M ࡛ࡣ㸪ᢳฟᖹ⾮࡟฿㐩ࡍࡿࡓࡵ࡟㸪ࡼࡾ㛗࠸࢟ࣕࣆ࣮ࣛࣜࢆ⏝࠸ࡿᚲせࡀ࠶ࡿࡇ࡜ࡀࢃ࠿ࡗࡓ㸬[1] ᑠ᳃᭷ᕼᏊ௚㸪2015 ᪥ᮏᨺᑕ໬Ꮫ఍ᖺ఍࣭➨ 59 ᅇᨺᑕ໬Ꮫウㄽ఍ 1B07㸪௝ྎ㸪2015 ᖺ
9 ᭶.
[2] H. Haba, Pacifichem 2015, INOR 1578, Honolulu, Hawaii, U.S.A., Dec. 2015.

- 47 -



1B11

Rf ྠ᪘ඖ⣲ Zr, Hf ࡢሷ໬≀࡟ᑐࡍࡿ➼᪂₲኱㝔⮬↛ ࠊ᪂₲኱⌮࢞ࢫࢡ࣐ࣟࢺࢢࣛࣇ࢕ ‫ۑ‬ⓑ஭㤶㔛 ࠊᢲぢྜྷᡂ ࠊᚋ⸨┿୍ ࠊ኱Ụ୍ᘯ ࠊᕤ⸨ஂ᫛ ࠙ࡣࡌࡵ࡟ࠚࡇࢀࡲ࡛ Rf ࡢ໬Ꮫⓗᛶ㉁ࢆㄪ࡭ࡿࡓࡵ࡟ 4 ᪘ඖ⣲ሷ໬≀ࡢẼ┦໬Ꮫ◊✲ࡀ⾜ࢃࢀ࡚ࡁࡓࡀࠊᚓࡽࢀࡓ྾╔࢚ࣥࢱࣝࣆ࣮ࡣࠊྠ᪘ඖ⣲ࡢ Zr, Hf ࡛ࡶࡤࡽࡘࡁࡀ኱ࡁࡃࠊRf ሷ໬≀ࡢ᥹Ⓨᛶࡢ㆟ㄽࡣᅔ㞴࡞≧ἣ࡟࠶ࡿ[1]ࠋࡑࡇ࡛ࠊᙜ◊✲ᐊ࡛ࡣࠊZr ࠾ࡼࡧ Hf ሷ໬≀࡟ࡘ࠸࡚ࠊ࢜ࣇࣛ࢖ࣥᐇ㦂࡟ࡼࡾヲ⣽࡞➼ ࢞ࢫࢡ࣐ࣟࢺࢢࣛࣇ࢕ᣲືࡢㄪᰝࢆ⾜ࡗ࡚ࡁࡓ[2]ࠋ
ᮏ◊✲࡛ࡣࠊ᪂ࡓ࡞ゎᯒᡭἲ࡟ࡼࡾࢺ࣮ࣞࢧ㔞ࡢ ZrCl4 ࠾ࡼࡧ HfCl4 ࡢṇ☜࡞྾╔࢚ࣥࢱࣝࣆ࣮ࢆᑟฟࡋࠊ▼ⱥ࣒࢝ࣛ⾲㠃࡜ࡢ┦஫స⏝࡟ࡘ࠸࡚ࡢ▱ぢࢆᚓࡿࡓࡵ࡟ࠊᵝࠎ࡞᮲௳࡟࠾ࡅࡿ➼ ࢞ࢫࢡ࣐ࣟࢺࢢࣛࣇ࢕ᐇ㦂ࢆ⾜ࡗࡓࠋ࠙ᐇ㦂ࠚ88Zr ࠾ࡼࡧ 175Hf ࢺ࣮ࣞࢧࢆྵࡴሷ㓟⁐ᾮࢆ཯ᛂ㒊࡟タ⨨ࡋࡓ࣮࢝࣎ࣥࣇ࢕ࣝࢱ࣮࡟
௜╔ࡋࠊ650 ̊C ࡛✵Ẽ࡜࡜ࡶ࡟ຍ⇕ࡋ࡚㓟໬≀ࢆ⏕ᡂࡋࡓࠋࡘࡂ࡟ࠊᅄሷ໬Ⅳ⣲ࢆ㣬࿴ࡋࡓHe ࢞ࢫࢆὶࡋ 600 ̊C ࡛ᅄሷ໬≀ࢆ⏕ᡂࡋࠊ᥹Ⓨࡋࡓᅄሷ໬≀ࢆ 75 ̊C ࡢሷ໬≀ᤕ㞟㒊࡟ᤕ㞟ࡋࡓࠋ⣙ 90 ศᚋࠊᅄሷ໬Ⅳ⣲ࡢ౪⤥ࢆ᩿ࡕࠊሷ໬≀ᤕ㞟㒊ࢆ ZrCl4 ࠶ࡿ࠸ࡣ HfCl4 ࡢ᥹Ⓨᗘ௨ୖ࡟ຍ⇕ࡋࡓࠋ࠶ࡽ࠿ࡌࡵᡤᐃࡢ ᗘ࡟ࡋ࡚࠾࠸ࡓ㛗ࡉ 30 cm ࡢ➼ 㒊ࢆ㏻㐣ࡋࡓሷ໬≀ࢆỈ෭ᤕ㞟㒊࡟࡚ᤕ㞟ࡋࠊ୍ᐃ᫬㛫ࡈ࡜࡟ᨺᑕ⬟ࢆ Ge ༙ᑟయ᳨ฟჾ࡛ ᐃࡋ࡚⣼✚཰⋡ࢆᚓࡓࠋ࠙⤖ᯝ࡜⪃ᐹࠚ Zvára ࡟ࡼࡿ᥹Ⓨᛶ໬Ꮫ✀ࡢ࣒࢝ࣛ㏻㐣ࣔࢹࣝ[3]࡛ࡣࠊ➼ࡅࡿᖹᆒಖᣢ᫬㛫‫ݐۃ‬୰ ሺܶ୧ୱ୭ ሻ‫ࡣۄ‬ḟᘧ࡛⾲ࡉࢀࡿࠋ‫ݐۦ‬୰ ሺܶ୧ୱ୭ ሻۧ ൌ

㒊 ᗘ Tiso ࡟࠾‫ܶݎܮ‬଴ ܲ ʹߨܴͳοୟୢୱ ‫ܪ‬ȉඨȉ ߬଴ ȉȉ ൬െ
൰
ܳ଴ ܲ଴
ܴܶ୧ୱ୭
‫ܯ‬
ඥܶ୧ୱ୭

L, r㸸࣒࢝ࣛ㛗࡜࣒༙࢝ࣛᚄࠊQ0㸸ᇶ‽≧ែ( ᗘT0, ᅽຊP0)࡛ࡢὶ㔞ࠊP㸸࣒࢝ࣛᅽຊ
M㸸᥹Ⓨᛶ໬ྜ≀ࡢศᏊ㔞ࠊτ0㸸྾╔ศᏊࡢ⾲㠃࡛ࡢ᣺ື࿘ᮇࠊTiso㸸➼ ࣒࢝ࣛ ᗘ8‫ܖܔ‬൛‫ ܚ࢚ۦ‬ሺࢀܑ‫ ܗܛ‬ሻۧඥࢀܑ‫ ܗܛ‬ൟࡇ ࡢ ᘧ ࢆ ኚ ᙧ ࡍ ࡿ ࡜ ൛‫ݐۃ‬୰ ሺܶ୧ୱ୭ ሻ‫ۄ‬ඥܶ୧ୱ୭ ൟࡀ
1/Tiso ࡢ୍ḟ㛵ᩘ࡜࡞ࡾࠊഴࡁ࠿ࡽ྾╔࢚ࣥࢱࣝࣆ࣮ࡀᚓࡽࢀࠊ⿦⨨ࣃ࣓࣮ࣛࢱ➼ࡣษ∦࡜ࡋ࡚ࡲ࡜ࡵࡽࢀࡿࠋ
ᅗ 1 ࡟ࢺ࣮ࣞࢧ㔞࡜࣐ࢡࣟ㔞࡟࠾ࡅࡿ
ZrCl4 ࡟ᑐࡍࡿゎᯒ⤖ᯝࢆ♧ࡍࠋᙜึࡢண᝿㏻
ࡾࡼ࠸┤⥺㛵ಀࡀᚓࡽࢀࠊࡑࡢഴࡁ࠿ࡽ⿦⨨ࣃ࣓࣮ࣛࢱ➼࡟౫Ꮡࡋ࡞࠸྾╔࢚ࣥࢱࣝࣆ
࣮࡜ࡋ࡚ࢺ࣮ࣞࢧ㔞࡛ࡣെͻͳǤͻ േ ͳǤ͸ kJ/molࠊ࣐ࢡࣟ㔞࡛ࡣെͺͳǤ͵ േ ͳǤͻ kJ/mol ࢆᚓࡓࠋㅮ₇࡛ࡣࠊHfCl4 ࡢ⤖ᯝࡶຍ࠼ࠊࡇࡢゎᯒᡭἲࡢጇᙜᛶ࡟ࡘ࠸᳨࡚ウࡋࡓ⤖ᯝࢆሗ࿌ࡋࠊࡉࡽ࡟ࠊ࣐ࢡࣟ㔞࡜ࢺ࣮ࣞࢧ㔞࡛ࡢ྾╔࢚ࣥࢱࣝࣆ࣮ࡢ㐪࠸࡟ࡘ࠸࡚㆟ㄽࡍࡿࠋ440

Tiso/K

420

400

380

360

tracer-scale
Slope㸸11057.0s188.1'adsH 91.9s1.6 kJ/mol

6420.0022

macro-scale
Slope㸸9778.0s227.2'adsH 81.3s1.9 kJ/mol

0.00240.0026

Tiso-1/K-1

0.0028

ᅗ 1. ࢺ࣮ࣞࢧ㔞࠾ࡼࡧ࣐ࢡࣟ㔞࡟࠾ࡅࡿ ZrCl4 ࡢ࠙ཧ⪃ᩥ⊩ࠚ
[1] A. Türler et al., Chem. Rev. 113, 1237 (2013).
[2] ᢲぢྜྷᡂ ௚, ➨ 58 ᅇᨺᑕ໬Ꮫウㄽ఍ P08 (2014).
[3] I. Zvára., Radiochim. Acta 38, 95 (1985).

྾╔࢚ࣥࢱࣝࣆ࣮ࡢᑟฟࠋ

Isothermal gas-chromatography of chloride of Rf homologues Zr and Hf
SHIRAI, K., OSHIMI, Y., GOTO, S., OOE, K., KUDO, H.

- 48 -

௡᨝ᰈᖵ ።  ጆῢጆΰ
$‫ܙ‬$ῴ$ ౕ༄
%‫ܙ‬%ῴ% ౕ༄




2A01

ཎᏊຊᶵᵓࢱࣥࢹ࣒ຍ㏿ჾ࡛ࡢ /L ࢖࢜ࣥࣅ࣮࣒ࢆ⏝࠸ࡓ࢔ࢫࢱࢳࣥ࡜
ࣚ࢘⣲ᨺᑕᛶྠ఩యࡢ〇㐀࡜฼⏝㔞◊ᶵᵓ㔞Ꮚࣅ࣮࣒ ࠊ㔠ἑ኱་⸆ಖ೺ ࠊ㔠ἑ኱ ཎᏊຊᶵᵓ ࠊ㔠ἑ኱⌮ᕤ ‫ۑ‬す୰୍ᮁ ࠊ㮖ᒣᖾಙ ࠊ๓⏣ⱥኴ ࠊ㇂ཱྀᣅᾏ ࠊᶓᒣ᫂ᙪ ࠊᶫᮏ࿴ᖾ 

3000

25000

2500

20000

2000

CountsCounts䛆⥴ゝ䛇㻌 ࡀࢇ἞⒪⏝ RI ࡜ࡋ࡚ὀ┠ࡉࢀ࡚࠸ࡿȘᨺᑕయ 211At㸦༙ῶᮇ 7.2 h㸧ࢆ 211Rn/211At ࢪ࢙
ࢿ࣮ࣞࢱ(211Rn 14.6 h)࡜ࡋ࡚౪⤥ࡍࡿࡓࡵࡢ㛤Ⓨࣉࣟࢪ࢙ࢡࢺࢆ㐍ࡵ࡚࠸ࡿࠋᮏࣉࣟࢪ࢙ࢡࢺ
࡛ࡣࠊࢪ࢙ࢿ࣮ࣞࢱࢆ〇㐀ࡍࡿࡓࡵࡢ᰾཯ᛂ 209Bi(7Li,5n)211Rn ࡛౑⏝ࡍࡿ 7Li ࢖࢜ࣥࣅ࣮࣒ࢆ
᭷ຠ฼⏝ࡋࠊnatPb(7Li,x)nat+7-xAtࠊ natSn(7Li,xn)nat+7-xI ࡛ࠊAtࠊI ᨺᑕᛶྠ఩యࢆ〇㐀ࠊศ㞳ࡋ࡚ࠊ↓ᢸయ࢔ࢫࢱࢳࣥࡢ໬Ꮫᣲືࢆㄪ࡭ࠊࢪ࢙ࢿ࣮ࣞࢱ㛤Ⓨ࡟ᙺ❧࡚࡚࠸ࡿࠋᮏࣉࣟࢪ࢙ࢡࢺ࡛
㛤Ⓨࡋࡓ஝ᘧ⵨␃࡟ᇶ࡙ࡃ໬Ꮫศ㞳࡛ࡢ↓ᢸయ AtࠊI ࡢ〇㐀ࠊศ㞳ࠊ฼⏝࡟ࡘ࠸࡚ሗ࿌ࡍࡿࠋ
䛆ᐇ㦂䛇 ཎᏊຊᶵᵓࢱࣥࢹ࣒ຍ㏿ჾ᪋タࡢ↷ᑕࢥ࣮ࢫ࡟タ⨨ࡋࡓ He ࢞ࢫᚠ⎔෭༷ᶵ⬟ࢆᣢࡘ↷ᑕ⿦⨨࡛ࠊ㖄ࠊ㘏㔠ᒓࡢⷧ⭷ࢱ࣮ࢤࢵࢺ࡟ࠊ60 MeV 7Li ࢖࢜ࣥࣅ࣮࣒ࢆ↷ᑕࡋࠊ࢔ࢫࢱࢳ
ࣥࠊࣚ࢘⣲ᨺᑕᛶྠ఩యࢆྜᡂࡋࡓࠋྜᡂࡋࡓ RI ࡣ⡆᫆஝ᘧ⵨␃ἲ࡟ࡼࡗ࡚㔠ᒓⷧ⭷ࢱ࣮ࢤࢵࢺ࠿ࡽศ㞳⢭〇ࡋࡓ[1]ࠋ㔠ᒓⷧ⭷ࢱ࣮ࢤࢵࢺࢆヨ㦂⟶㸦ෆᚄ 16 mmࠊ㛗ࡉ 18 cm㸧࡟ධࢀࠊ⟶ෆࢆ❅⣲࢞ࢫ࡛⨨᥮ࡋࡓᚋࠊ࣏࢚ࣜࢳࣞࣥ⣔ࣇ࢕࣒ࣝࡢࢹࣗࣛࢩ࣮࡛ࣝ஧㔜࡟ᐦᑒࡋࡓࠋ
ヨ㦂⟶ࡢᗏ࠿ࡽ 6 cm ࡢ㒊఩ࢆ 650Υ࡟ ᗘタᐃࡋࡓ㟁Ẽ⅔ෆ࡟ᤄධࡋ࡚ຍ⇕ࡋࡓࠋࡑࡢ㝿ࠊ
ヨ㦂⟶ෆ࡛ࡢ RI ࡢᨺᑕ⬟ᙉᗘࡢ᫬㛫ኚ໬ࢆ 16 mm ゅࡢ❆ࢆᣢࡘཌࡉ 3cm ࡢ㖄㐽ⶸయෆ࡟タ⨨ࡋࡓ CdZnTe ༙ᑟయ᳨ฟჾ࡛ ᐃࡋࡓࠋࡉࡽ࡟⵨␃ᚋࠊヨ㦂⟶ෆቨ࡟௜╔ࡋࡓ RI ࡢᨺᑕ⬟ศᕸࡶ ᐃࡋࠊࡇࡢ⡆᫆஝ᘧ⵨␃ἲࡢศ㞳᮲௳ࢆヲ⣽࡟ㄪ࡭ࡓࠋ
䛆⤖ᯝ䛇 ᅗ 1 ࡟ࠊຍ⇕᫬ࡢヨ㦂⟶ᗏഃ㸦‫ۑ‬㸧࡜ヨ㦂⟶ཱྀഃ㸦‫ە‬㸧࡛ࡢ At ᨺᑕ⬟ᙉᗘࡢ᫬㛫ኚ໬ࢆ♧ࡍࠋ⣙ 10 ศ㛫ࡢຍ⇕᫬㛫࡛ࠊ⼥ゎࡋࡓ㖄࠿ࡽ At ࡀ⵨␃࡛ࡁ࡚࠸ࡿࠋຍ⇕ᚋࡢヨ㦂⟶ෆቨ࡟௜╔ࡋࡓ At ࡢᨺᑕ⬟ศᕸ㸦ᅗ㸰㸧ࡣࠊ650Υ࡟ຍ⇕ࡋࡓ㒊఩࡜-3Υ࡟෭༷ࡋࡓ㒊఩ࡢ㛫࡛ᴟ኱್ࢆ♧ࡍࡇ࡜࠿ࡽࠊヨ㦂⟶ཱྀഃࡢ෭༷࡟ࡼࡾࠊAt ࢆヨ㦂⟶ෆቨ࡬ຠ⋡ⓗ࡟྾╔࡛ࡁ࡚࠸ࡿࡇ࡜ࡀศ࠿ࡿࠋㅮ₇࡛ࡣࠊ↓ᢸయ AtࠊI ࡢሷ㓟⁐ᾮ࡜ࢪ࢖ࢯࣉࣟࣆ࢚࣮ࣝࢸࣝ㛫࡛ࡢศ㓄ẚ[2]࡞࡝ࠊࢺ࣮ࣞࢧ࣮ࢆ฼⏝ࡋࡓ᭱᪂ࡢ◊✲ᡂᯝ࡟ࡘ࠸࡚ࡶሗ࿌ࡍࡿࠋ

1500
1000

10000
5000

500
0

15000

0

2

4

6

8

10

12

0

14

650 Υ
ヨ
㦂
⟶
ᗏ
ഃ
1

3

-3 Υ

5

7

9

ヨ
㦂
⟶
ཱྀ
ഃ

11 13 15 17

Position [cm]Time [min]ᅗ㸯㻌 At ⵨␃᫬ࡢᨺᑕ⬟ᙉᗘ᫬㛫ኚ໬      ᅗ㸰㻌 At ⵨␃ᚋࡢヨ㦂⟶ෆศᕸ䛆ཧ⪃ᩥ⊩䛇㻌 㻌 [1] Nishinaka et al., J. Radioanal. Nucl. Chem. 304(2015) 1077-1083.
[2] Maeda et al., J. Radioanal. Nucl. Chem. 303(2015) 1465-1468.
Production and Utilization of Astatine and Iodine Radioisotopes Using 7Li Ion Beams at the JAEA
Tandem Accelerator
NISHINAKA, I., WASHIYAMA, K., MAEDA, E., TANIGUCHI, T., YOKOYAMA, A.,
HASHIMOTO, K.

- 49 -

2A02⌮◊࡟࠾ࡅࡿ $W 〇㐀⌮◊ோ⛉ࢭ ࠊཎᏊຊᶵᵓ ࠊ㜰኱ ࠊ5, ༠఍  ‫ۑ‬బ⸨ᮃ ࠊ▮⣡ៅஓ ࠊ⩚ሙᏹග ࠊᑠ᳃᭷ᕼᏊ ࠊᰘ⏣ㄔ୍ ࠊΏ㑓៞Ꮚ ࠊຍ἞኱ဢ ࠊ㇏ᔱཌྐ ࠊ
㧗ᶫ࿴ஓ ࠊᯇᮏᖿ㞝 䛆⥴ゝ䛇㻌 211At ࡣࠊ㏆ᖺ RI ෆ⏝⒪ἲ࡛ࡢ฼⏝ࡀ኱࠸࡟ᮇᚅࡉࢀ࡚࠸ࡿ Į ᨺฟ᰾✀࡛࠶ࡿ[1]ࠋ211At
ࡣ▷ᑑ࿨᰾✀㸦T1/2 = 7.214 h㸧࡛࠶ࡾࠊࡲࡓᅜෆ࡟ᩘ࠿ᡤࡋ࠿࡞࠸኱ᆺࡢຍ㏿ჾࢆ⏝࠸࡚〇㐀ࡍࡿᚲせࡀ࠶ࡿࡓࡵࠊྛຍ㏿ჾ᪋タࡀࢿࢵࢺ࣮࣡ࢡࢆᙧᡂࡋࠊ฼⏝⪅࡟Ᏻᐃ࡟ 211At ࢆ౪⤥ࡍࡿࡇ࡜ࡀ
ᮃࡲࢀ࡚࠸ࡿ[2]ࠋᡃࠎࡢ◊✲ࢢ࣮ࣝࣉ࡛ࡣࠊ⌮◊ RI ࣅ࣮࣒ࣇ࢓ࢡࢺ࣮ࣜࡀᑗ᮶ 211At ࡢ౪⤥ᣐⅬࡢ୍ࡘ࡜࡞ࡿࡇ࡜ࢆ┠ᣦࡋࠊ⌮◊ AVF ࢧ࢖ࢡࣟࢺࣟࣥࢆ⏝࠸࡚ 211At ࡢ〇㐀ᢏ⾡㛤Ⓨࢆ㛤ጞࡋࡓࠋ䛆ᐇ㦂䛇㻌 AVF ࡛ຍ㏿ࡋࡓ Į ࣅ࣮࣒㸦᭱኱ 12 ȝA㸧ࢆ 209Bi 㔠ᒓᶆⓗ࡟↷ᑕࡋࠊ209Bi(Į,2n)211At ཯ᛂ
࡟ࡼࡾ 211At ࢆ〇㐀ࡋࡓࠋࣅ࣮࣒࢚ࢿࣝࢠ࣮ࡣࠊ㟼㟁ᆺࣆࢵࢡ࢔ࢵࣉ[3]ࢆ⏝࠸࡚㣕⾜᫬㛫 ᐃἲ࡟ࡼࡾỴᐃࡋࡓࠋ209Bi ᶆⓗ㸦ཌࡉ: ⣙ 20 mg/cm2㸧ࡣࠊཌࡉ 1 mm ࡢ㖡ᯈୖ࡟┿✵⵨╔ἲ࡛సᡂࡋࡓࠋ
ᶆⓗࢆࣅ࣮࣒㍈᪉ྥ࡟ᑐࡋ࡚ 15°࡟ഴࡅ࡚タ⨨ࡋࠊ↷ᑕ୰ࡣࠊ209Bi ᶆⓗഃࢆᚠ⎔࣒࣊ࣜ࢘㸦30
L/min㸧ࠊ㖡ᯈഃࢆᚠ⎔Ỉ㸦1.5 L/min㸧࡟ࡼࡗ࡚෭༷ࡋࡓࠋ↷ᑕᚋࠊ᪤ሗࡢẼ┦໬Ꮫศ㞳ἲ[4]ࢆཧ
⪃࡟ࡋ࡚ࠊ211At ࢆ 209Bi ᶆⓗ࠿ࡽ໬Ꮫศ㞳ࡋࡓࠋࡲࡎࠊ209Bi ᶆⓗࢆ㖡ᯈࡈ࡜▼ⱥ⟶㸦ෆᚄ 34 mm×㛗ࡉ 20 cm㸧ෆ࡟⨨ࡁࠊ࣒࣊ࣜ࢘ࢆ 20 mL/min ࡢὶ㔞࡛ὶࡋ࡞ࡀࡽ⟶≧㟁Ẽ⅔࡛ 850Υ࡟᪼ ࡋࡓࠋ㟁Ẽ⅔ࡢ ᗘࢆ 850Υ࡟ 30 ศ㛫ಖᣢࡋࠊ209Bi ᶆⓗ࠿ࡽ᪼⳹ࡋࡓ 211At ࢆ PFA ⟶㸦ෆᚄ 2 mm×㛗ࡉ
5 cm㸧ࢆ㏻ࡋ࡚ప ࢺࣛࢵࣉ࡬ᦙ㏦ࡋࡓࠋࢺࣛࢵࣉ࡟ࡣࠊࡽࡏࢇ≧࡟⤖᮰ࡋࡓ㛗ࡉ 2 m ࡢ PFA ⟶㸦ෆᚄ 2 mm ࡲࡓࡣ 4 mm㸧ࡲࡓࡣ▼ⱥ⟶㸦ෆᚄ 2 mm㸧ࢆᾮయ❅⣲ ᗘ࡟෭༷ࡋ࡚⏝࠸ࡓࠋPEEK⟶ࢺࣛࢵࣉ㸦ෆᚄ 2 mm㸧ࡣࠊᾮయ❅⣲࡜࢚ࢱࣀ࣮ࣝ࡜ࡢΰྜ⁐፹࡛㸫77Υ࡟෭༷ࡋࡓࠋ211At ࡢᤕ㞟ᚋࠊࢺࣛࢵࣉࢆᐊ ࡟ᡠࡋࠊ㏦ᾮ࣏ࣥࣉࢆ⏝࠸࡚ࢺࣛࢵࣉ⟶ෆࢆ⃰ሷ㓟࡛‶ࡓࡋ࡚ 5 ศ㛫ᨺ⨨ᚋࠊ⃰ሷ㓟ࢆ 15 mL ㏦ᾮࡋ࡚㸦ὶ㏿ 5 mL/min㸧211At ࢆᅇ཰ࡋࡓࠋ211At ࡢ⏕ᡂᨺᑕ⬟ࡸ໬Ꮫ཰⋡ࡣࠊGe ᳨ฟჾࢆ⏝࠸ࡓ Ȗ ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺ࣮ࣜ࡟ࡼࡗ࡚ホ౯ࡋࡓࠋࡲࡓࠊICP-MS ࢆ⏝࠸࡚໬Ꮫඖ⣲ศᯒࢆ⾜࠸ࠊᶆⓗ≀㉁ࡢ㝖ᰁಀᩘࠊ⢭〇 211At ⁐ᾮ୰ࡢ୙⣧≀ඖ⣲⃰ᗘࢆホ౯ࡋࡓࠋ࠙⤖ᯝ䛸⪃ᐹࠚ ᶆⓗධᑕ࢚ࢿࣝࢠ࣮28.6 MeV ࡛ࡢ 211At ࡢ⏕ᡂ཰⋡ࡣ 8.4s1.3 GBq/C ࡛ࠊࣅ࣮࣒
ᙉᗘ 0.02 – 10 ȝA ࡢ⠊ᅖ୍࡛ᐃ࡛࠶ࡗࡓࠋࡇࡢ཰⋡ࡣࠊIAEA ࡀ᥎ዡࡋ࡚࠸ࡿ 209Bi(Į,2n)211At ཯ᛂࡢ✚⟬཰⋡[5]࠿ࡽィ⟬ࡋࡓ್࡟Ⰻࡃ୍⮴ࡋࡓࠋෆᚄ 2 mm ࡢࢺࣛࢵࣉ࡟ࡼࡿ 211At ࡢ໬Ꮫ཰⋡ࡣࠊࢺࣛࢵࣉ⟶ࡢᮦ㉁࡟ࡼࡽࡎ⣙ 50%࡛࠶ࡗࡓࠋ209Bi(Į,3n)210At ཯ᛂ࡟ࡼࡗ࡚⏕ᡂࡍࡿ 210At ࡣࠊEC
ቯኚ࡟ࡼࡗ࡚ẘᛶࡢ㧗࠸㛗ᑑ࿨ࡢ 210Po㸦T1/2 = 138 d㸧ࢆ⏕ᡂࡍࡿࡓࡵࠊ᰾་Ꮫ฼⏝࡛ၥ㢟࡜࡞ࡿࠋ௒ᅇࡢᅇ཰⁐ᾮ୰࡟ࡣࠊ210At ࡣ᳨ฟࡉࢀࡎࠊ210At/211At ཎᏊᩘẚࡣࠊ<2×10-3%࡛࠶ࡗࡓࠋ209Bi ᶆⓗࡢ㝖ᰁಀᩘࡣࠊ>1.3×102 ࡛࠶ࡗࡓࠋ
[1] F. Guerard et al., Cancer Biother. Radio. 28, 1 (2013).
[2] ⩚ሙᏹග㸪ᮾ໭኱Ꮫ㟁Ꮚග⌮Ꮫ◊✲ࢭࣥࢱ࣮◊✲఍ࠕᨺᑕᛶྠ఩ඖ⣲㸦RI㸧〇㐀ィ⏬࡜ከศ㔝࡟࠾ࡅࡿ RI ฼⏝ࡢ⌧≧ࠖ
㸪2016 ᖺ 2 ᭶ 8 ᪥㸪௝ྎᕷ.
[3] Ώ㑓⎔࡯࠿㸪Proceedings of the 12th Annual Meeting of Particle Accelerator Society of Japan, Tsuruga,
Japan, 1198 (2015).
[4] K. Nagatsu et al., Appl. Radiat. Isot. 94, 363 (2014).
[5] S.M. Qaim et al. (eds.), IAEA Technical Report Series No. 473, IAEA, Vienna, Austria (2011).

Production of At-211 at RIKEN
SATO, N., YANO, S., HABA, H., KOMORI, Y., SHIBATA S., WATANABE, K., KAJI, D.,
TOYOSHIMA, A., TAKAHASHI, K., MATSUMOTO, M.

- 50 -

$ࢥࣥࣉࢺ࣓ࣥ࢝ࣛ࢖࣓࣮ࢪࣥࢢ⏝ 7FP ཬࡧ 7F ࡢ⏕ᡂ◊✲㔞◊ᶵᵓ ࠊཎᏊຊᶵᵓ ࠊி㒔኱Ꮫ ࠊᮾᾏ኱Ꮫ ࠊி㒔⸆኱  ‫ึۑ‬ᕝ㞝୍ ࠊሯ⏣࿴᫂ ࠊᶫᮏ࿴ᖾ ࠊబ⸨ဴஓ ࠊὸ஭㞞ே ࠊ㇏ᓥཌྐ ࠊỌ஭Ὀᶞ ࠊ㇂᳃㐩 ࠊᅬ⏣ಙஓ ࠊᰴᮌ㔜ே ࠊᮌᮧᐶஅ ࠊ㧗⏣῟ྐ ࠊỈᮏဴஓ ࠊ᪩ᕝᓅே 䛆⥴ゝ䛇ࢸࢡࢿࢳ࣒̺࢘99m ࡣ᳨ฟࡋ᫆࠸ 141 keV ࡢ࣐࢞ࣥ⥺࡜ 6 ᫬㛫ࡢ༙ῶᮇ࡜࠸ࡗࡓඃࢀ
ࡓ᰾≉ᛶࡺ࠼࡟ࡶࡗ࡜ࡶᗈ⠊࡟᰾་Ꮫデ᩿࡟࠾࠸࡚⏝࠸ࡽࢀ࡚࠾ࡾࠊࡍ࡛࡟ 30 ✀㢮௨ୖࡢᶆ㆑໬ྜ≀ࡀ᰾་Ꮫデ᩿⸆࡜ࡋ࡚㛤Ⓨࡉࢀ࡚࠸ࡿࠋ㏆ᖺࠊኳయ≀⌮Ꮫ◊✲⏝࡟㛤Ⓨࡉࢀࡓࢥࣥ
ࣉࢺ࣓ࣥ࢝ࣛࡢ᰾་Ꮫデ᩿◊✲࡬ࡢᛂ⏝࡟ࡘ࠸᳨࡚ウࡉࢀ࡚࠸ࡿࠋࡋ࠿ࡋࢥࣥࣉࢺ࣓ࣥ࢝ࣛ
ࡢ㐺ᛂ࡟ࡣ㧗࢚ࢿࣝࢠ࣮࣐࢞ࣥ⥺ᨺฟ᰾✀ࡀᚲせ࡛࠶ࡾࠊ141 keV ࡢ࣐࢞ࣥ⥺࡛ࡣࢥࣥࣉࢺࣥ
ᩓ஘ࡢ☜⋡ࡀࡁࢃࡵ࡚ᑡ࡞ࡃࡇࡢ┠ⓗ࡟ࡣ Tc-99m ࡣ୙㐺࡛࠶ࡿࠋTc-99㹫ࡢ௦ࢃࡾ࡟㧗࢚ࢿࣝࢠ࣮ᨺฟࢸࢡࢿࢳ࣒࢘ྠ఩యࢆࢥࣥࣉࢺ࣓ࣥ࢝ࣛ᧜ീ࡜⤌ࡳྜࢃࡏࢀࡤ᪂ࡋ࠸᰾་Ꮫデ᩿ἲࢆ㛤Ⓨࡍࡿࡇ࡜ࡀྍ⬟࡟࡞ࡿࠋᮏ◊✲࡛ࡣ 500 ࠿ࡽ 800 keV ࡢ㧗࠸࢚ࢿࣝࢠ࣮ࡢ࣐࢞ࣥ⥺ᨺฟ᰾✀࡛࠶ࡿ Tc-95m(T1/2=60 d)࠾ࡼࡧ Tc-96(T1/2=4 d)ࢆ⏕ᡂࡋࠊࡇࢀࡽࡢࢥࣥࣉࢺ࣓ࣥ࢝ࣛ
᧜ീᐇ㦂ࢆ⾜࠸᰾་Ꮫデ᩿ἲ㛤Ⓨ࡟ྥࡅࡓᇶ♏◊✲ࢆ⾜ࡗࡓࠋ䛆ᐇ㦂ཬ䜃⤖ᯝ䛇᪥ᮏཎᏊຊᶵᵓཎᏊຊ⛉Ꮫ◊✲ᡤࡢࢱࣥࢹ࣒ຍ㏿᪋タ࡟࠾࠸࡚୕㓟໬ࣔࣜࣈࢹࣥࢱ࣮ࢤࢵࢺ࡬ࡢ㝧Ꮚࣅ࣮࣒ࡢ↷ᑕ࡟ࡼࡗ࡚⣙ 0%T ࡢ 7FP ࢆ⏕ᡂࡋࡓࠋ↷ᑕヨᩱࡣᩥ⊩㸯࡟グࡋࡓศ㞳ἲ࡟ࡼࡾ୕㓟໬ࣔࣜࣈࢹࣥࢱ࣮ࢤࢵࢺ୰࡟⏕ᡂࡋࡓ 7FP ࢆศ㞳ࠊ⢭〇ࡋࠊศ㞳ࡉࢀࡓ 7FP ⁐ᾮࡣ┤ᚄ  ੈࡢࣉࣛࢫࢳࢵࢡᐜჾ࡟ᑒධࡋ᧜ീᐇ㦂࡟౪ࡉࢀࡓࠋ
ࢥࣥࣉࢺ࣓ࣥ࢝ࣛ᧜ീࡣி㒔኱Ꮫࡢ㟁Ꮚ㣕㊧᳨ฟᆺࢥࣥࣉࢺ࣓ࣥ࢝ࣛ (7&&(OHFWURQ
7UDFNLQJ&RPSWRQ&DPHUD ࢆ⏝࠸࡚⾜ࡗࡓࠋ(7&& ࡛ࡣࢥࣥࣉࢺࣥᩓ஘㟁Ꮚࡢ఩⨨࡜࢚ࢿࣝࢠ
࣮ཬࡧᩓ஘࣐࢞ࣥ⥺ࡢ఩⨨࡜࢚ࢿࣝࢠ࣮ࡀほ ࡉࢀࠊࡇࢀࡽ࡟ᇶ࡙࠸࡚࢖࣋ࣥࢺẖ࡟ゎᯒࢆ⾜࠺ࡇ࡜࡟ࡼࡾᮏ᮶ࡢ࣐࢞ࣥ⥺ࡢ఩⨨᝟ሗࢆᚓࡿࡇ࡜ࡀ࡛ࡁࡿࠋᮏ◊✲࡟⏝࠸ࡓ 7FP ࡣNH9 ࡢ࣐࢞ࣥ⥺ࢆᨺฟࡍࡿࡀ(7&& ࡟ࡼࡾࡑࢀࡒࢀࡢ࢚ࢿࣝࢠ࣮࡛ᘚูࡋࡓ᧜ീࡋࡓ  ḟඖࢫ࣌ࢡࢺࣝࢆᅗ̺ ࡟♧ࡍࠋࡇࡢ⤖ᯝࡼࡾᚓࡽࢀࡓ఩⨨ศゎ⬟ࡀ࣐࢞ࣥ⥺ࡢ࢚ࢿࣝࢠ࣮ࡀ㧗ࡃ࡞ࡿ࡯࡝Ⰻ࠸ศゎ⬟ࢆ♧ࡋ࡚࠸ࡿࡇ࡜ࡀศ࠿ࡗࡓࠋ఍㆟࡛ࡣ 7F ࡟㛵ࡍࡿ⤖ᯝࡶሗ࿌ࡍࡿணᐃ࡛࠶ࡿࠋ
ᅗ ̺1 ࢥࣥࣉࢺ࣓ࣥ࢝ࣛ᧜ീᅗࠋ
ETCC ࡟ࡼࡾ᧜ീࡉࢀࡓ
Tc-95m ࡢ⏬ീࠋ୰ኸ㒊ⓑ୸ࡣȭ10㹫㹫ࡢ⥺※ࡢ఩⨨ཬࡧᙧ≧ࢆ♧ࡋ࡚࠸ࡿࠋ
ᩥ⊩㸯㸬Y. Hatsukawa,et al., J Radioanal Nucl Chem (2015) 303:1283–1285- 51 -

ġ$

ຍ㏿ჾ୰ᛶᏊ฼⏝ 0R 〇㐀࡟࠾ࡅࡿ⃰⦰ 0R2 ヨᩱࡢᅇ཰࡜෌฼⏝༓௦⏣ࢸࢡࣀࣝ ࠊ㔞◊ᶵᵓ  ‫ۑ‬ᕝ➃᪉Ꮚ ࠊᮏ▼❶ྖ ࠊబ఑⚽ஓ ࠊ➉ෆ ᐉ༤ ࠊᶫᮏ࿴ᖾ ࠊึᕝ㞝୍ ࠊỌ஭Ὀᶞ 䛆⥴ゝ䛇 ᡃࠎࡣࠊ 0R ࡢᅜෆᏳᐃ౪⤥࡟ྥࡅ࡚ຍ㏿ჾ୰ᛶᏊࢆ฼⏝ࡋ࡚⃰⦰ 0R2 ࠿ࡽ
0R QQ 0R ཯ᛂ࡛ 0R ࢆ〇㐀ࡍࡿ᪉ἲࢆ㛤Ⓨ୰࡛࠶ࡿࠋᮏ᪉ἲ࡛〇㐀ࡉࢀࡿ 0R ࡣࠊ㧗⃰⦰࢘ࣛࣥ +(8 ୙౑⏝࡛ᨺᑕᛶᗫᲠ≀ࡀᑡ࡞࠸཯㠃ࠊ+(8 ࡢ᰾ศ⿣཯ᛂ࡛〇㐀ࡉࢀࡿ
0R ࡼࡾࡶࡣࡿ࠿࡟ẚᨺᑕ⬟ࡀᑠࡉ࠸Ⅽࠊ0R ࡢ኱㔞〇㐀ࡢࡓࡵ࡟ J ௨ୖࡢ 0R2 ヨᩱࢆ౑⏝ࡍࡿィ⏬࡛࠶ࡿࠋලయⓗ࡟ࡣࠊ
ຍ㏿ჾ୰ᛶᏊ↷ᑕ῭ࡳࡢ 0R2 ࢆ㧗 ࡛⁐⼥ࡋࠊ0R࠿ࡽቯኚࡋ⏕ᡂࡋࡓ P7F ࡀ᪼⳹ࠊ࢞ࢫ໬ࡋࡓࡶࡢࢆప 㡿ᇦ࡛จ⦰ᅇ཰ࡍࡿࠋࡑࡢ୰࡛

0R2 ࡶ୍㒊᪼⳹ࡍࡿࡀࠊP7F 㓟໬≀࡜ࡣจᅛⅬࡀ␗࡞ࡿⅭࠊ0R2 ࡢࡳࡀ㔪≧⤖ᬗ࡜ࡋ࡚ᯒฟࡋ༢㞳ࡍࡿࡇ࡜ࡀྍ⬟࡛࠶ࡿࠋᮏ〇㐀ἲ࡟࠾࠸࡚ࡣࠊ0R2 ࡀ㧗㢠ࡢⅭࠊ౑⏝ᚋ㸦0R
ቯኚᚋ㸧ࡢ 0R2 ヨᩱࡣ㧗཰⋡࡛ᅇ཰ࡋࠊ෌฼⏝ࡍࡿࡇ࡜ࡀ୙ྍḞ࡛࠶ࡿࠋࡑࡇ࡛ࠊP7Fศ㞳ᚋࡢ 0R2 ヨᩱࢆࠊຍ⇕⁐⼥࡜ỈὙί࡟ࡼࡗ࡚ࠊ㧗࠸཰⋡࡛ᅇ཰ࡍࡿ᪉ἲࢆ㛤Ⓨࡋࡓࠋ䛆ᐇ㦂䛇ຍ㏿ჾ୰ᛶᏊ↷ᑕ࡛⏕ᡂࡋࡓ 0R ࡀቯኚᚋࡢ 0R2 ྜィ J ࢆ  ࡘࡢⓑ㔠ࡿࡘࡰP࡟ศ๭タ⨨ࡋࠊ
⟶≧㟁Ẽ⅔ෆ࡟࠾࠸࡚ Υ࡛  ศຍ⇕ࡋ࡚ࠊ
7F ⇕ศ㞳ࢆᶍᨃⓗ࡟ᐇ᪋ࡋࠊ

0R2 ヨᩱࡢ୍㒊ࢆࠊࡿࡘࡰ࠿ࡽ᪼⳹ࡉࡏࠊ▼ⱥ⟶ෆࡢᅇ཰㒊࡟㔪≧⤖ᬗ࡜ࡋ࡚ᯒฟࡉࡏࡓࠋ
㔪≧⤖ᬗࡣ Υ௨ୗࡢ୍ᐃࡢ ᗘ㡿ᇦᖏ࡟㞟୰ศᕸࡋ࡚⏕ᡂࡉࢀࡿࡓࡵࠊࡇࢀࢆྲྀࡾฟࡋࠊ
ࡑࡢ▼ⱥ⟶ࢆ⢭〇Ỉࡀධࡗࡓࣅ࣮࣮࢝࡟ᾐࡋ࡚ࠊ㉸㡢Ἴࢆ⏝࠸࡚ᅇ཰ࡋࠊ⵨Ⓨ஝ᅛࡉࡏࡓࠋ
୍᪉ࠊࡿࡘࡰ࡟ṧ␃ࡋࡓ 0R2 ࡣࠊࡿࡘࡰࡈ࡜ࢆୖୗ཯㌿ࡉࡏ Υ࡛  ศຍ⇕ࡍࡿࡇ࡜࡟
ࡼࡾࠊ▼ⱥ₃ᩯࢆ㏻ࡋ࡚タ⨨ࡋࡓ▼ⱥヨ㦂⟶࡟⁐⼥ᅇ཰ࡋࡓࠋࡇࡢ᫬౑⏝ࡋࡓ₃ᩯࢆྵࡵࠊ

0R2 ࡀ᥋ゐࡍࡿྍ⬟ᛶࡀ࠶ࡿ௚ࡢ▼ⱥ㒊ရࡶࠊඛ࡟㏙࡭ࡓ㉸㡢ἼὙίࢆᐇ᪋ࡋࠊ0R2
ࢆᅇ཰ࡋࡓࠋ᭱ᚋ࡟ࠊ0R2 ࡢΰධࢆ㜵ࡄⅭ࡟ P7F ᅇ཰㒊ᡭ๓࡟タ⨨ࡋࡓࠊ▼ⱥ࣮࢘ࣝࢆ
Υ࡛ຍ⇕ࡋࠊ࣮࢘ࣝ࠿ࡽ 0R2 ࡔࡅࢆ㔪≧⤖ᬗ࡜ࡋ࡚᪼⳹ศ㞳ࡉࡏࠊὙίᅇ཰ࡋࡓࠋࡲ
ࡓࠊู࡟ᑡ㔞ヨᩱࢆ⏝࠸࡚ࠊ ᅇ࡛ᯒฟࡋࡓ㔪≧⤖ᬗࢆヨᩱୖ㒊࡟タ⨨ࡋࠊḟᅇࡢ P7F ศ㞳᫬࡟ࡿࡘࡰෆࡢ 0R2 ࡜ඹ࡟෌⁐⼥ࡉࡏࠊ」ᩘᅇࡢ⇕ศ㞳࡟࠾ࡅࡿ 0R2 㔪≧⤖ᬗࡢࣜࢧ࢖ࢡࣝࢆヨࡳࡓࠋ
䛆⤖ᯝ䛇ヨᩱ࡜ࡋ࡚⏝࠸ࡓ 0R2  J ࡢෆ 㸣ࡀࡿࡘࡰෆ࡟ṧ␃ࠊ㸣ࡀ㔪≧⤖ᬗ࡜ࡋ࡚ᅇ཰㒊࡟㞟୰ࡋ࡚࠸ࡓࠋ
㸣௨ୗ 0R2 ࡣ࣮࢘ࣝࠊ࠶ࡿ࠸ࡣ₃ᩯ࡟௜╔ࡋ࡚࠾ࡾࠊ
ᅇ཰ྍ⬟࡛࠶ࡗࡓࠋヨᩱࡢᅇ཰⋡ࡣ 㸣ࢆ㐩ᡂࡋࡓࠋࡲ
ࡓࠊJ ࡢヨᩱࢆ⏝࠸࡚ࠊ⏕ᡂࡋࡓ㔪≧⤖ᬗࢆḟᅇຍ⇕ศ㞳᫬࡟ヨᩱୖ࡟タ⨨ࡋࠊヨᩱ࡜ඹ࡟⁐⼥ࠊ෌฼⏝ࡍࡿࡇ࡜࡟ࡶᡂຌࡋࡓ㸦ᅗ 㸧ࠋ0R2 ࠿ࡽࡢ P7F ⇕ศ㞳᧯స࡛ࡣ 0R2 ࡢ≧ែኚ໬ࡢࡳ࡛໬Ꮫᙧࡀኚ໬ࡋ࡞࠸Ⅽࠊᅇ཰ࡀᐜ࡛᫆࠶ࡿࠋࡲࡓࠊ⤖ᬗᅇ཰࡟ࡶ⸆ရࡀ୙せ࡛ࠊ୙⣧≀ΰධࡢ୙Ᏻࡀᑡ࡞࠸࡜࠸࠺฼Ⅼࡀ࠶ࡿࠋࡇࢀࡽࡢ
⤖ᯝ࠿ࡽ㧗㢠࡞ヨᩱ 0R2 ࡢ෌฼⏝ࡣ༑ศྍ⬟࡛࠶ࡾࠊ࠿ࡘ⇕ศ㞳ẖ࡟⤖ᬗࢆ෌฼⏝ࡍࡿࡇ࡜࡛ࠊࣟࢫࡢᑡ࡞࠸
ᅗ 1. 100MoO3 ヨᩱ࡜⤖ᬗࡢ෌฼⏝ศ㞳ࢩࢫࢸ࣒ࢆࢹࢨ࢖࡛ࣥࡁࡿࡇ࡜ࡀ♧ࡉࢀࡓࠋ
1㸧Y. Nagai et al.,J.Phys.Soc.Jpn. 82 (2013) 064201
Recovery and reuse of enriched 100MoO3 sample for 99Mo production by accelerator driven
neutrons. KAWABATA, M., MOTOISHI, S., SAEKI, H., TAKEUCHI, N., HASHIMOTO,
S., HATSUKAWA, Y. and NAGAI, Y.

- 52 -

࣐࣓࢞ࣥ࢝ࣛ࡟ࡼࡿṇᖖࣛࢵࢺࡢ࢔ࢫࢱࢳࣥ ࡜ࣚ࢘⣲ ࡢ

$ ⏥≧⭢࠾ࡼࡧ⫶࡬ࡢ㞟✚ホ౯㜰኱㝔་ 㸪᳃ࣀᐑࢡࣜࢽࢵࢡ 㸪ிᗓ་኱ 㸪㜰኱㝔⌮      ‫ۑ‬ụ⏣㞙ே 㸪Ώ㎶᫴୍㑻 㸪㧘ᶫᡂே 㸪⠛ཎཌ 㸪ୗ℩ᕝᜨஂ 㸪⏿⃝㡰 䛆⥴ゝ䛇䝶䜴⣲ , 䛿ྂ䛟䛛䜙ෆ⏝⒪ἲ䛻⏝䛔䜙䜜䛶䛔䜛᰾✀䛷䠈≉䛻⏥≧⭢䜔⫶䜈ከ䛟㞟✚䛩䜛䛣䛸䛜▱䜙䜜䛶䛔䜛䚹㏆ᖺ䠈ෆ⏝⒪ἲ䛻⏝䛔䜛᰾✀䛸䛧䛶䛔䛟䛴䛛䛾D⥺ᨺฟ᰾✀䛜ὀ┠䛥䜜䠈᪥ᮏ䛷䜒  ᖺ  ᭶䛻๓❧⭢䛜䜣䛾἞⒪⸆䛸䛧䛶ሷ໬䝷䝆䜴䝮 䛜D⥺ᨺฟ᰾✀䛸䛧䛶ึ䜑䛶ཌ⏕ປാ┬䛻䜘䜚ᢎㄆ䛥䜜䛯䚹D⥺䛿E ⥺䛻ẚ䜉䛶㣕⛬䛜▷䛟⥺䜶䝛䝹䜼䞊௜୚䛜኱䛝䛔䛣䛸䛛䜙䠈ෆ⏝⒪ἲ䛻䛚䛔䛶䛿἞⒪ຠᯝ䛾⠊ᅖ䛜㝈ᐃⓗ䛷䛒䜚䠈࿘㎶ṇᖖ⤌⧊䜈䛾ᙳ㡪䛿ᑡ䛺䛔䛸ᮇᚅ䛥䜜䛶䛔䜛䚹ᮏ◊✲䛷䛿D⥺ෆ⏝⒪ἲ䜈䛾ᛂ⏝䛜ᮇᚅ䛥䜜䛶䛔䜛᰾✀䛾୍䛴䛷䛒䜛䜰䝇䝍䝏䞁 $W䛜䠈䝷䝑䝖䛾⏥≧⭢ཬ䜃⫶䜈䛹䛾䜘䛖䛻㞟✚䛩䜛䛾䛛䜢䜺䞁䝬䜹䝯䝷䜢⏝䛔䛶ㄪ䜉䛯䚹䜎䛯యෆᣲື䛾ẚ㍑䛸䛧䛶䝶䜴⣲䜢⏝䛔䛯䛜䠈ᮏ◊✲䛷䛿䜲䝯䞊䝆䞁䜾᰾✀䛸䛧䛶䝶䜴⣲ , 䜢⏝䛔䜛䛣䛸䛸䛧䛯䚹㻌䛆ᐇ㦂䛇$W ࡣ኱㜰኱Ꮫ᰾≀⌮◊✲ࢭࣥࢱ࣮࡛ %L ⟩࡟Dࣅ࣮࣒ࢆ↷ᑕࡋࡓᚋ㸪◪㓟⁐ᾮࡼࡾ⁐፹ᢳฟἲ࡟ࡼࡾ⢭〇ࡋࡓࡶࡢࢆ⏝࠸ࡓࠋࡲࡓ , ࡣࣚ࢘໬ࢼࢺ࣒ࣜ࢘࡜ࡋ࡚ᐩኈࣇ࢕࣒ࣝ 5, ࣇ࢓࣮࣐ࡼࡾ㉎ධࡋࡓࡶࡢࢆ⏝࠸ࡓࠋ 㐌㛫࣮ࣚࢻไ㝈ୗ࡛㣫⫱ࡋࡓṇᖖࣛࢵࢺ :LVWDU ࣛࢵࢺ㸪ܴ㸪ᢞ୚᫬  㐌㱋 ࡟ $W ࡲࡓࡣ , ࢆ㟼⬦ὀᑕ࠾ࡼࡧ⤒ཱྀ࡟ࡼࡾᢞ୚ࡋࡓࠋᢞ୚ᚋ  ศ㸪 ᫬㛫㸪 ᫬㛫㸪 ᫬㛫㸪 ᫬㛫࡛  ศ㛫࣐࣓࢞ࣥ࢝ࣛ࡟ࡼࡿ᧜ീࢆ⾜ࡗࡓࠋ ᫬㛫ᚋ࡜  ᫬㛫ᚋࡣ  ศ㛫ࡢ᧜ീࢆ⾜ࡗࡓࠋᚓࡽࢀࡓ⏬ീ࠿ࡽ⏥≧⭢࠾ࡼࡧ⫶࡟㛵ᚰ㡿ᇦࢆタᐃࡋ㸪ᢞ୚᫬้࡬⿵ṇࢆ⾜ࡗࡓᨺᑕ⬟ࢆᢞ୚᪉ἲ࠾ࡼࡧ᰾✀࡟ࡼࡗ࡚ࡑࡢᦤྲྀ⋡ࡢẚ㍑ࢆ⾜ࡗࡓࠋ㻌䛆⤖ᯝ䛇⏥≧⭢࡬ࡢ $W ࠾ࡼࡧ , ࡢᦤྲྀ⋡ࡢࣆ࣮ࢡࡣ㸪㟼⬦ὀᑕ࠾ࡼࡧ⤒ཱྀࡢ࠸ࡎࢀࡶᢞ୚ᚋ  ᫬㛫࡛࠶ࡗࡓࠋ$W ࡢᦤྲྀ⋡ࡣ , ࡢ  ๭⛬ᗘ࡛࠶ࡗࡓࠋ⫶࡛ࡣᢞ୚┤ᚋࢆࣆ࣮ࢡ࡜ࡋ࡚ᦤྲྀ
⋡ࡀపୗࡋࡓࠋ
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(YDOXDWLRQRI$VWDWLQHDQG,RGLQH8SWDNHVIRU7K\URLG*ODQGDQG6WRPDFKRI1RUPDO5DWVE\*DPPD&DPHUD
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3 &D=E'M÷&-&|Õ­À&c¥&Ë56«%ÃÇ%È"!3Qn}\'aûÑÛ&^¤W5 0 %4(fÂN&à²Ú%&++ñiÜ! 2
4%0 »53
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éè~ô! 6%{3M÷Í5º,\3iÜ 3
o 1. GófµàµÚ&6Ø¸&Ò sdgÙ·[1] D. L. Preston et al., Radiat. Res. 168, 1-64 (2007).

Mathematical Model of Solid Cancers related to HiroshimaNagasaki A-Bomb Victims
BABA, H., TAKAMIYA, K.

- 54 -

$

࣮࣋ࢱ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺ࣮ࣜ
࠾Ⲕ኱⌮ ࠊ-5,$ࠊࢧࣥࢦࣂࣥ  ‫⏣ྂۑ‬ᝋᏊ ࠊᫍ㔝ⴌ⏕ ࠊⲡ㛫⤒஧ ࠊΏ㎶⿱ኵ 3࠙⥴ゝࠚ ࣮࣋ࢱ⥺ࡣࠊ⥺ࢫ࣌ࢡࢺࣝࢆ♧ࡍ࢔ࣝࣇ࢓⥺࣭࣐࢞ࣥ⥺࡜␗࡞ࡾࠊ㐃⥆ࢫ࣌ࢡࢺࣝ
ࢆ♧ࡍࠋࡇࡢࡓࡵࠊࢫ࡮ࢡࢺ࣓ࣟࢺ࣮ࣜࠊࡍ࡞ࢃࡕ࢚ࢿࣝࢠ࣮ࢫ࣌ࢡࢺࣝࢆ ᐃࡋࠊᨺᑕᛶ
᰾✀ࢆྠᐃࡍࡿࡇ࡜ࡣ㞴ࡋ࠸࡜⪃࠼ࡽࢀ࡚ࡁࡓࠋ୍᪉ࠊᚑ᮶ࡢ࣮࣋ࢱ⥺ࡢ฼⏝ࡣࠊ⏕࿨⛉Ꮫ⣔ࡢ㠀ᐦᑒᨺᑕᛶྠ఩ඖ⣲࡜ࡋ࡚௦ㅰ◊✲࡞࡝࡟㝈ᐃࡉࢀࠊࡑࡢ ᐃ࡟ࡣࠊࡶࡗࡥࡽᾮయࢩ
ࣥࢳ࣮ࣞࢩࣙࣥ࢝࢘ࣥࢱ࣮㸦/6&㸧ࡀ⏝࠸ࡽࢀ࡚࠸ࡿࠋཎⓎ஦ᨾᚋࡣࠊ⎔ቃ୰࡟ࡶ᰾✀୙᫂ࡢ࣮࣋ࢱ᰾✀ࡀᏑᅾࡍࡿࠋ/6& ࡣࠊ୍⯡࡟ࢫ࣌ࢡࢺࣝࢆ♧ࡍࡇ࡜ࡀ࡛ࡁࡿࡀࠊᾮయࢩࣥࢳࣞ
࣮ࢱ࡟ᨺᑕᛶ≀㉁ࢆ⁐࠿ࡋ㎸ࡴ ʌ ᐃ࡛ࡣࠊᚲࡎࢡ࢚ࣥࢳࣥࢢࡀⓎ⏕ࡋࠊࡑࡢ᭱኱࢚ࢿࣝࢠ
࣮ࡣప࢚ࢿࣝࢠ࣮ഃ࡟ࢩࣇࢺࡍࡿࠋᾮయࢩࣥࢳ࣮ࣞࢱ࡟௦࠼࡚ࠊ᭷ᶵᗫᾮࡢⓎ⏕ࡋ࡞࠸ࣉࣛ
ࢫࢳࢵࢡࢩࣥࢳ࣮ࣞࢱ㸦36㸧ࢆ⏝࠸ࡿ᪉ἲ 㸧ࡀ࠶ࡾࠊ36 ἲ࡛ࡣࠊⰍࢡ࢚ࣥࢳࣥࢢ௨እࡣ㉳ࡇࡽࡎ 㸧ࠊ᰾✀ྠᐃࡀྍ⬟࡛࠶ࡿࠋࡋ࠿ࡋ 36 ࢆ⏝࠸ࡓሙྜ࡟ࢡ࢚ࣥࢳࣥࢢࡀ㉳ࡇࡽ࡞࠸࡜ࡍࡿホ౯ࡣࠊ㟁Ẽⓗ࡟ 0&$ ࡢ  ࢳࣕࣥࢿࣝࢆ NH9 ࡜ࡋ࡚࠸ࡿࡇ࡜࡟ᇶ࡙࠸࡚࠸ࡿࠋ௒ᅇࠊ⥺ࢫ࣌ࢡࢺࣝࢆ♧ࡍෆ㒊㌿᥮㟁Ꮚࢆ⏝࠸ࠊࢳࣕࣥࢿࣝ࡜࢚ࢿࣝࢠ࣮ࡢ㛵ಀࢆồࡵࠊ࠿ࡘࠊ36 ௨እ࡟ศゎ⬟ࡀ␗࡞ࡿ࡜⪃࠼ࡽࢀࡿ↓ᶵࢩࣥࢳ࣮ࣞࢱࢆ⏝࠸ࡓሙྜ࡟ࡘ࠸࡚ ᐃࡋࡓࠋ࠙ᐇ㦂ࠚ ࣍ࢺ࣐ࣝࡣ 307+㸦὾࣍ࢺ㸧࡟ࠊࣉࣛࢢ࢖ࣥࢱ࢖ࣉࡢ 0&$㸹6HQVRU.LW0&$
VWDJH+93DUW1XPEHU㸦ࢧࣥࢦࣂࣥ㸧ࢆࡘ࡞࠸ࡔ࣍ࢺ࣐ࣝ  ᮏࢆࠊ㐽ග࣎ࢵࢡࢫ࡟ධࢀ ᐃჾ࡜ࡋࡓࠋ ✀㢮ࡢࢩࣥࢳ࣮ࣞࢱ㸹36 ࢧࣥࢦࣂࣥ ࡜ *62 ࢜࢟ࢧ࢖ࢻ ࢆ 307 ṇ㠃࡟⨨ࡁࠊෆ㒊㌿᥮ᶆ‽⥺※㸹%L NH9 ࠊ࣮࣋ࢱ⥺ᶆ‽⥺※ 3P (PD[ 
NH9 &R (PD[ NH9 &O (PD[ NH9 7O (PD[ NH9  ௨ୖ (FNHUW =LHJOHU ࠊ࠾ࡼࡧ㠀ᐦᑒࡢᨺᑕᛶྠ఩ඖ⣲ + (PD[ NH9 & (PD[ NH9 6 (PD[ NH9㸦௨ୖ
0HWKLRQQH 0RUDYHN %LRFKHPLFDOV㸧ࢆ 36 ➼࡟⁲ୗࡋࡓヨᩱࢆసᡂ࣭ ᐃࡋࠊ࢚ࢿࣝࢠ࣮࡜ࢳ
ࣕࣥࢿࣝࡢ㛵ಀࢆồࡵࡓࠋ⏝࠸ࡓࢩࣥࢳ࣮ࣞࢱࡢ≉ᚩࢆ⾲࡟♧ࡍࠋ࠙⤖ᯝ࠾ࡼࡧ⪃ᐹࠚ  ✀㢮ࡢࢩࣥࢳ࣮ࣞࢱࡢ⾲  ᭷ᶵ࣭↓ᶵࢩࣥࢳ࣮ࣞࢱࡢ≉ᚩ࠸ࡎࢀࢆ⏝࠸ࡓሙྜ࡛ࡶࠊ࢚ࢿࣝࢠ࣮ࡢ㏆࠸
3ODVWLF*DGROLQLXPVFLQWLOODWRU
VLOLFDR[LGH%L ࡢࣆ࣮ࢡ  ᮏࡣ᏶඲࡞ศ㞳ࡣฟ᮶࡞࠿ࡗࡓࠋ
36㸸%& *62ࡋ࠿ࡋࠊࡑࡢศゎ⬟ࡣ␗࡞ࡾࠊࢫ࣌ࢡࢺࣝᙧ≧ 3URGXFW
3RO\YLQ\O%DVH
*G6L2 ࡣ᫂ࡽ࠿࡟␗࡞ࡗࡓࠋࢫ࣌ࢡࢺࣝࡢࣆ࣮ࢡࢺࢵ FRPSRXQGV WROXHQH
ࣉ࡜࡞ࡿࢳࣕࣥࢿࣝ࡜࢚ࢿࣝࢠ࣮ࡢ㛵ಀࡣࠊ࠸ 'HQVLW\
JFP ࡎࢀࡢሙྜࡶⰋዲ࡞┤⥺㛵ಀࢆ♧ࡋࡓࠋྠࡌࢤ
5LVH WLPH

a
࢖࡛ࣥ 㹼NH9 ࢆ㉸ࡍ┤⥺ᛶࢆᚓࡿࡇ࡜ࡣࠊ QV %* ࡢ㛵ಀ࡛㞴ࡋ࠸ࡶࡢࡢࠊࢤ࢖ࣥࢆኚ࠼ࡿࡇ࡜ 'HFD\ WLPH 
QV ࡟ࡼࡾࠊ%L ࡢ  ᮏࡢప࢚ࢿࣝࢠ࣮ࣆ࣮ࢡࢺࢵ
:DYHOHQJWK 0D[   ࣉ࡜㠀ᐦᑒࡢ࣮࣋ࢱ⥺ࡢࢫ࣌ࢡࢺ࢚ࣝࣥࢻ࣏࢖
QP 
5HIUDFWLYHࣥࢺࡶࠊⰋ࠸┤⥺㛵ಀࢆ♧ࡋࡓࠋ

LQGH[
௒ᚋ⎔ቃヨᩱࡢ ᐃࢆヨࡳࡿணᐃ࡛࠶ࡿࠋ
 )8587$(HWDO5DGLRFDUERQ/6&  ຍ⸨⤖ⰼ ௚ ᪥ᮏᨺᑕ⥺Ᏻ඲⟶⌮Ꮫ఍➨  ᅇᏛ⾡኱఍ࠊᖹᡂ  ᖺ  ᭶  ᪥ࠊ3
%HWDUD\VSHFWURPHWU\)8587$(+26+,127.86$0$.:$7$1$%(<- 55 -

2A08

ᾮయࣛ࢖ࢺ࢞࢖ࢻࢆ⏝࠸ࡿ᪂ࡋ࠸Ț⥺᳨ฟჾࡢ㛤Ⓨ(➨୍ሗ)
ᮾ⌮኱ ࠊ⏘⥲◊ ࠊ89,;ᮾ኱⥲  ‫ۑ‬㔝ᮧ㈗⨾ ࠊᰆᮌᙲ ࠊ⣽⏣࿴ኵ ࠊ᳃ᡞ♸ᖾ ࠊᑎ஭㝯ᖾ ࠊᑎᓥ༓ᬗ㸯Counts /1000s䛆⥴ゝ䛇 ᾮయࢩࣥࢳ࣮ࣞࢱࢆྵࡴࣛ࢖ࢺ࢞࢖ࢻ(LSLG)࡟ග㟁Ꮚቑಸ⟶ࢆ㐃⤖ࡋࡓ᪂ࡋ࠸Ț⥺᳨ฟჾࢆస〇ࡋࡓࠋࡇࢀࡣࠊࣇࣞ࢟ࢩࣈࣝ࡞᳨ฟჾ࡞ࡢ࡛ ᐃᑐ㇟≀ࡢᙧ≧࡟ྜࢃࡏ࡚ࠊᕳ
ࡁ௜ࡅࡿࡇ࡜ࡶ࡛ࡁࡿࠋᨺᑕ⥺ሙࡢᙉ࠸࡜ࡇࢁࡢ఩⨨᳨ฟჾ࡜ࡋ࡚ࠊࡓ࡜࠼ࡤ㓄⟶ෆ㒊࡞࡝ࡢ⊃࠸✵㛫ࡢᨺᑕ⥺ ᐃࡀ࡛ࡁࠊ⌧ሙࡢ≧ἣ࡟ᛂࡌ࡚㎿㏿࡞ᨺᑕ⥺ ᐃ࡟౪ࡍࡿࡇ࡜ࡀ࡛ࡁ
ࡿࠋࡲࡓࠊᗫỈᵴࡸ㈓ỈᵴࡢỈ୰ࡢᨺᑕ⬟ࡢศᕸ ᐃࡸ▼Ἔࢱࣥࢡࡢࣞ࣋ࣝィ࡜ࡋ࡚ࡢᛂ⏝ࡸᅵተ୰ࡢᆶ┤ศᕸࡢ ᐃ࡟ࡶ฼⏝ࡢྍ⬟ᛶࡀ࠶ࡿࠋ࢞ࣛࢫࣇ࢓࢖ࣂ࣮ࡸࣉࣛࢫࢳࢵࢡࢫࣇ
࢓࢖ࣂ࣮ࡢᨺᑕ⥺఩⨨᳨ฟჾ࡞࡝ࡀ㛤Ⓨࡉࢀ࡚ࡁࡓࡀࠊ⣽࠸ࣇ࢓࢖ࣂ࣮ᨾ࡟」㞧࡞ᵓᡂ࡟࡞
ࡗ࡚࠸ࡿࠋ௒ᅇ㛤Ⓨࡋࡓ LSLG ᳨ฟჾࡣࠊ㠀ᖖ࡟⡆༢࡞ᵓ㐀࡛ኴࡉࡶ⮬⏤࡟ኚ࠼ࡽࢀࠊỗ⏝ᛶࡢ࠶ࡿ᳨ฟჾ࡛࠶ࡿࠋࡲࡎࠊ➨୍ᙎ࡜ࡋ࡚ Ȗ ⥺࡟ᑐࡍࡿᇶᮏⓗ࡞ᛂ⟅≉ᛶ࡟ࡘ࠸࡚ሗ࿌ࡍ
ࡿࠋ䛆ᐇ㦂䛇 ࣇࣞ࢟ࢩࣈࣝ࡞ࣉࣛࢫࢳࢵࢡࢳ࣮ࣗࣈෆࢆప࠸ᒅᢡ⋡ࡢ⓶⭷࡛ࢥ࣮ࢸࣥࢢࡋࠊࡑࡇ࡟
ᾮయࢩࣥࢳ࣮ࣞࢱࢆὀධࡋ࡚▼ⱥ࢞ࣛࢫࡢ❆ࢆ⿦╔ࡋࡓࠋࡇࢀࢆࣇࣞ࢟ࢩࣈࣝ࡞ಖㆤࢳ࣮ࣗ
ࣈ(࢔࣑ࣝࢽ࣒࢘࡜ࣉࣛࢫࢳࢵࢡࢫ)࡟ධࢀ࡚ග㟁Ꮚቑಸ⟶ࢆྲྀࡾ௜ࡅࠊLSLG ᳨ฟჾࢆస〇ࡋ
ࡓࠋLSLG ࢳ࣮ࣗࣈࡢኴࡉࡀ␗࡞ࡿࡶࡢࢆ⏝ពࡋࡓࠋLSLG ࢳࣗ㸫ࣈࡢ୰ᚰ఩⨨࠿ࡽ 1.5cm ࡟㞳ࡋ࡚タ⨨ࡋࡓ Cs-137 ࡢⅬ⥺※ࡢࣃࣝࢫἼ㧗ࢫ࣌ࢡࢺࣝࢆ ᐃࡋࡓࠋ䛆⤖ᯝ䛇㻌  ᅗ㸯ࡣࠊ㛗ࡉ㸯mࠊෆᚄ㸳mm ࡜ 10mm ࡢ LSLG ᳨ฟჾࢆ⏝࠸࡚ග㟁Ꮚቑಸ⟶࡟㏆࠸ᡤ࡜㐲ࡃࡢᡤ࡛ ᐃࡋࡓࣃࣝࢫἼ㧗ࢫ࣌ࢡࢺࣝࢆ♧ࡍࠋⓎගἼ㛗ࡣࠊ⣙㸲㸰㸮nm ࡛࠶ࡿࠋ⥺※ࢆග㟁Ꮚቑಸ⟶࠿ࡽ㐲ࡊࡅࡿ࡜ගࡢᙉᗘࡢῶ⾶࡟క࠸ࠊἼ㧗್ࡣᑠࡉࡃ࡞ࡿࠋࡋ࠿ࡋࠊ
࢝࢘ࣥࢺᩘࡣࠊ⥺※఩⨨࡟࠶ࡲࡾᐤࡽࡎ࡯ࡰ୍ᐃࡢ್ࢆ♧ࡋࡓࠋࡇࡢῶ⾶࠿ࡽᨺᑕ⥺ࡢ఩⨨ࡀ᳨ฟࡉࢀࡿࠋLSLG ࡢ
100000Source : 220kBq Cs-137
ෆᚄࢆ㸰ಸࡍࡿ࡜᳨ฟຠ
length : 1 m Position : 15mm from center of tube
⋡ࡣࠊ3.2-3.6 ಸ࡟࡞ࡗࡓࠋ
100001m ࡜ 2m ࡢ LSLG ࢆ᥋⥆
SSLG10mm1m9cm
䐡D 10mm Nearrࡋ࡚ 3m ࡢ LSLG ᳨ฟჾ
1000࡜ࡋ࡚ࡶ฼⏝࡛ࡁࡿࠋSSLG10mm1m90c
䐢D 10mm Far
m
LSLG ࢆ෇ᙧ࡟ࡋ࡚ࡑࡢ
SSLG5mm1m9cm
䐟D
5mm
Near
100
୰ᚰ࡟Ⅼ⥺※ࢆ⨨࠸࡚
SSLG5mm1m90cm
䐠D 5mm Farᐃࡋࡓ⤖ᯝࠊ୍ᵝ࡟ῶ⾶
Total
10ࡋࡓࣃࣝࢫἼ㧗ࢫ࣌ࢡࢺ䐟 360㼼3.3cps
䐠 387㼼3.3cpsࣝࡀᚓࡽࢀࡓࠋࡇࢀࡣ
LSLG ࡟ࡼࡾ୍ᵝ࡞ᨺᑕ
1
㻜
㻡㻜㻜
㻝㻜㻜㻜
㻝㻡㻜㻜
㻞㻜㻜㻜
⥺ሙࡢᖹᆒ⥺㔞ࢆ ᐃࡋ
Channels (Pulse height)ࡓࡇ࡜࡟࡞ࡿࠋヲࡋ࠸ࡇ࡜ࡣᙜ᪥Ⓨ⾲ࡍࡿࠋ               ᅗ㸯 ෆᚄ 5mm ࡜ 10mm ࡢ LSLG ᳨ฟჾࡢࣃࣝࢫἼ㧗≉ᛶ

- 56 -

2B01

㧗㏿୰ᛶᏊ↷ᑕ䛻䜘䜛᰾཯㊴ຠᯝ䜢⏝䛔䛯ᨺᑕᛶ㻌Sr@C60䛾⏕ᡂ㻌㤳㒔኱㝔⌮ᕤࠊ㔞Ꮚᶵᵓ ‫⛅ۑ‬ᒣ࿴ᙪࠊᐑୗ⏤㤶ࠊึᕝ㞝୍ࠊஂ෠ᮌᚿ㑻

䛆䛿䛨䜑䛻䛇㻌 ⡲ୖศᏊࣇ࣮ࣛࣞࣥ C60 ࡟㔠ᒓཎᏊࢆෆໟࡋࡓ M@C60㸦M ࡣ㔠ᒓཎᏊࢆࠊ@ࡣෆໟࡉࢀࡓ≧ែࢆ♧ࡍࠋ㸧ࡣࡑࡢᵓ㐀ⓗ࣭㟁Ꮚⓗ⯆࿡࠿ࡽ㔠ᒓࣇ࣮ࣛࣞࣥⓎぢᙜึࡼࡾ㠀ᖖ࡟㛵ᚰࢆᣢࡓࢀ࡚ࡁࡓࠋࡋ࠿ࡋ࡞ࡀࡽࠊM@C60 ࡣ୍⯡ⓗ࡞㔠ᒓࣇ࣮ࣛࣞࣥࡢᢳฟ⁐፹࡟ࡣ୙⁐࡛
࠶ࡾࠊLi@C60 ࢆ㝖࠸ࡓ M@C60 ࡟ࡘ࠸࡚ࡣ⌧ᅾࡲ࡛༢㞳࡟ࡍࡽ⮳ࡗ࡚࠸࡞࠸ࠋ
୍⯡ⓗ࡞ M@C60 ࡢྜᡂࡣ௚ࡢ㔠ᒓෆໟࣇ࣮ࣛࣞࣥ࡜ྠᵝ࡟࢔࣮ࢡᨺ㟁ἲ࡛⾜ࢃࢀࡿࡇ࡜
ࡀከ࠸ࡀࠊ๪⏕ᡂ≀࡜ࡋ࡚ᚓࡽࢀࡿ኱㔞ࡢࢫࢫ࠿ࡽࡢศ㞳࣭ᢳฟࡀ㠀ᖖ࡟ᅔ㞴࡛࠶ࡿࠋࡇࡢ
ᵝ࡞ࣇ࣮ࣛࣞࣥ㢮௨እࡢ๪⏕ᡂ≀ࡢⓎ⏕ࢆᢚ࠼ࡿ M@C60 ࡢྜᡂἲ࡜ࡋ࡚ࠊ㏆ᖺࠊࣉࣛࢬ࣐ࢩ
࣮ࣕ࣡ἲ[1]ࡸ᰾཯㊴⌧㇟ࢆ฼⏝ࡋࡓᨺᑕᛶ㔠ᒓࣇ࣮ࣛࣞࣥྜᡂἲ[2-3]࡞࡝ࡢ㔠ᒓཎᏊࢆ┤᥋
C60 ࡬ὀධࡍࡿᡭἲࡀὀ┠ࡉࢀ࡚࠸ࡿࠋ
ᡃࠎࡣࠊࡇࢀࡲ࡛࡟ DT ཯ᛂ࡛⏕ࡌࡿ 14MeV 㧗㏿୰ᛶᏊࢆࣇ࣮ࣛࣞࣥ C60 ࡜ࢫࢺࣟࣥࢳ࢘
࣒(Sr)ሷࡢΰྜ≀࡟↷ᑕࡍࡿࡇ࡜࡛ࠊ(n,2n)཯ᛂ࡟ࡼࡗ࡚཯㊴ࡋࡓ 85Sr ࡀ C60 ࡟ྲྀࡾ㎸ࡲࢀࡿࡇ࡜࡛ᨺᑕᛶ Sr ࣇ࣮ࣛࣞࣥࡀ⏕ᡂࡍࡿࡇ࡜ࢆ☜ㄆࡋ࡚࠸ࡿࠋᮏ◊✲࡛ࡣࢥ࣮ࣝࢻࣛࣥ࡟ࡼࡾྜ
ᡂࡋࡓ Sr@C60 ࢆ㧗㏿ᾮయࢡ࣐ࣟࢺࢢࣛࣇ࢕࣮ (HPLC)ᒎ㛤ࡋࠊ⁐ฟᡂศࡢ TOF/MS ᐃ࠿ࡽࠊ85
Sr@C60 ⁐ฟ఩⨨ࢆỴᐃࡋࠊḟ࠸࡛ Sr ࣇ࣮ࣛࣞࣥヨᩱࢆྠᵝࡢ᮲௳࡛ HPLC ᒎ㛤ࡍࡿࡇ࡜࡛85
Sr@C60 ࡢ☜ㄆࢆヨࡳࡓࠋ䛆ᐇ㦂䛇㻌 Sr@C60 ヨᩱࡣ࢔࣮ࢡᨺ㟁ἲ࡟ࡼࡾྜᡂ
ࡋࠊ⏕ᡂࡋࡓࢫࢫ࠿ࡽ࢔ࢽࣜࣥ࡟ࡼࡾᢳฟࡋࡓࠋ
ࡇࡢヨᩱࢆ⏝࠸࡚ HPLC(࣒࢝ࣛBuckyclutcher Iࠊ⛣ື┦࢔ࢽࣜࣥ)࡟ᒎ㛤ࡋࠊ⁐ฟᡂศࢆ 1 ศࡈ࡜࡟ศ⏬ࡋ࡚ LD-TOF/MS ᐃࢆ⾜ࡗࡓࠋࡲࡓࠊ
85
Sr ࣇ࣮ࣛࣞࣥࡣ SrCO3 ࡜ C60 ࡢΰྜ≀࡟ࠊ᪥ᮏཎᏊຊ◊✲㛤Ⓨᶵᵓࡢ᰾⼥ྜ୰ᛶᏊ※(FNS)࡟
࡚ DT ཯ᛂ࡛⏕ࡌࡿ 14 MeV ࡢ㧗㏿୰ᛶᏊࢆ↷ᑕࡋ࡚ྜᡂࡋࡓࠋࡇࡢヨᩱࢆ࢔ࢽࣜࣥᢳฟࡋࠊᢳ
ฟ⁐ᾮࢆୖグ࡜ྠᵝࡢ᮲௳࡛ HPLC ᒎ㛤ࡋࠊ⁐ฟᡂศ࠿ࡽᨺฟࡉࢀࡿ 85Sr ⏤᮶ࡢJ⥺ࢆ Ge ༙ᑟ ᅗ. Sr@C60 ヨᩱࡢ HPLC ࢡ࣐ࣟࢺࢢ࣒ࣛ
࠾ࡼࡧศ⏬ࡢ TOF/MSయ᳨ฟჾ࡛ ᐃࡋࡓࠋ䛆⤖ᯝ䛇㻌 ᅗࡣ Sr@C60 ヨᩱࡢ HPLC ࢡ࣐ࣟࢺࢢ࣒ࣛ࠾ࡼࡧ⁐ฟᡂศࡢ TOF/MS ࡛࠶ࡿࠋศ⏬ c,d, e (17-20 min.)ࡢ MS(࢖ࣥࢭࢵࢺ)࡟ࡣ m/Z=808.67 ࡟ Sr@C60 ⏤᮶ࡢࣆ࣮ࢡࡀ☜ㄆ࡛ࡁࡿࡇ࡜
࠿ࡽࠊSr@C60 ࡣ 17-20 ศ࡟⁐ฟࡍࡿࡇ࡜ࡀศ࠿ࡗࡓࠋ85Sr ࣇ࣮ࣛࣞࣥヨᩱࢆ HPLC ᒎ㛤ࡋࠊ⁐ฟᡂศࡢJ⥺ ᐃࢆ⾜ࡗࡓ⤖ᯝ࠿ࡽࠊୖグ Sr@C60 ࡢ⁐ฟ఩⨨࡟ᡴ㎸ࡳヨᩱࡢᨺᑕ⬟ࡢ 0.1%⛬ᗘࡀ᳨ฟࡉࢀࡓࠋ
ࡇࢀࡽࡢ⤖ᯝ࠿ࡽ 85Sr@C60 ࡢ཰㔞ࡣ࠾ࡼࡑ 0.1%࡛࠶ࡿࡇ࡜ࡀ☜ㄆ࡛ࡁࡓࠋ
䛆ཧ⪃ᩥ⊩䛇㻌 [1]㻌 S. Aoyagi et al., Nature Chem., 2, 678 (2010). [2] T. Ohtsuki et al., Phys. Rev. Lett.,
77, 3522 (1996). [3] M. D. Diener et al., J. Am. Chem. Soc., 129, 5131 (2007).
Production of radioactive Sr@C60 by nuclear recoil phenomenon, AKIYAMA K., MIYASHITA

Y., HATSUKAWA Y., KUBUKI S.

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2B02໬Ꮫⓗ㑏ඖ཯ᛂࢆ⏝࠸ࡓ㔠ᒓෆໟࣇ࣮ࣛࣞࣥศ㞳ࡢ᮲௳᳨ウ㤳㒔኱㝔⌮ᕤ ࠊ⌮◊ோ⛉ࢭ  ‫⏣ۑ‬୰ᗣ௓ ࠊ⛅ᒣ࿴ᙪ㸯ࠊ⩚ሙᏹග㸰䛆⥴ゝ䛇㻌 㔠ᒓෆໟࣇ࣮ࣛࣞࣥ㸦EMF㸧ࡣࣇ࣮ࣛࣞࣥ࡟㔠ᒓཎᏊࢆෆໟࡋࡓໟ᥋ᵓ㐀ࢆᣢࡘศᏊ
࡛࠶ࡾࠊᨺᑕᛶ་⸆ရ࡜ࡋ࡚ࡢᛂ⏝ࡀᮇᚅࡉࢀ࡚࠸ࡿࠋࡇࡢᵝ࡞ᛂ⏝ࢆ┠ᣦࡍࡓࡵ࡟ࡣẚᨺᑕ⬟ࡢ㧗࠸ EMF ࡀᚲせ࡜ࡉࢀࡿࡀࠊEMF ࡢྜᡂ࡟࠾࠸࡚ࡣ๪⏕ᡂ≀࡛࠶ࡿ C60, C70 ࡞࡝ࡢ✵ࣇ࣮ࣛࣞࣥࡀ኱㔞࡟⏕ᡂࡍࡿࡓࡵࠊࢺ࣮ࣞࢧ࣮㔞ࡢ EMF ࢆ㧗ຠ⋡࡛ࠊ✵ࣇ࣮ࣛࣞࣥ࠿ࡽศ㞳ࡍࡿ᪉ἲࡀồࡵࡽࢀࡿࠋࡋ࠿ࡋࠊ୍⯡ⓗ࡟ศ㞳࡟⏝࠸ࡽࢀ࡚࠸ࡿ㧗㏿ᾮయࢡ࣐ࣟࢺࢢࣛࣇ࢕
࣮(HPLC)࡛ࡣከࡃࡢ᫬㛫࡜ࢥࢫࢺࢆᚲせ࡜ࡍࡿࡓࡵࠊࡼࡾຠ⋡ⓗ࡞ศ㞳᪉ἲࡀồࡵࡽࢀࡿࠋ
ᡃࠎࡣ㟁Ꮚࢻࢼ࣮ᛶ≀㉁࡟ࡼࡿ EMF ࡢ㑏ඖࡋ᫆ࡉ࡜୰ᛶࣇ࣮ࣛࣞࣥ✀ࡢᴟᛶ⁐፹࡬ࡢ㞴⁐ᛶࢆ⤌ࡳྜࢃࡏࡓศ㞳ࢆヨࡳ࡚ࡁࡓ[1]ࠋᮏ◊✲࡛ࡣࠊࡇࡢศ㞳࡟⏝࠸ࡿᴟᛶ⁐፹ࡈ࡜ࡢศ㞳ຠ⋡ࡢᕪ␗ࢆࠊ139Ce ෆໟࣇ࣮ࣛࣞࣥࢆᨺᑕᛶࢺ࣮ࣞࢧ࣮࡜ࡋ࡚⏝࠸ࠊᐃ㔞ⓗ࡟ẚ㍑᳨ウࡋࡓࠋIntensity / a. u.

䛆ᐇ㦂䛇㻌 139Ce ࢆྵࢇࡔከᏍ㉁Ⅳ⣲Წࢆ࢔࣮ࢡᨺ㟁ࡍࡿࡇ࡜࡟ࡼࡾ⏕ᡂࡋࡓࢫࢫࢆ஧◲໬Ⅳ⣲(CS2)࡛ᢳฟࡋࠊ139Ce ෆໟࣇ࣮ࣛࣞࣥࢆྵࡴࣇ࣮ࣛࣞࣥ⢒ᢳฟ≀ࢆᚓࡓࠋࡇࡢ CS2 ⁐ᾮ࡟ࢺ࢚ࣜࢳࣝ࢔࣑ࣥ(TEA)ࢆ⣙ 1㸸20 ࡢ๭ྜ࡛ΰྜࡋࡓ࢔ࢭࢺࢽࢺࣜࣝ(MeCN/TEA)ࠊ࣓ࢱࣀ࣮ࣝ
(MeOH/TEA)ࠊ࢚ࢱࣀ࣮ࣝ(EtOH/TEA)⁐ᾮࢆࡑࢀࡒࢀຍ࠼࡚᧠ᢾࡋࠊEMF ࡢ㑏ඖࢆ⾜ࡗࡓࠋࡑࡢᚋࠊࡇࢀࡽࡢ⁐ᾮࢆ࣓ࣥࣈࣞࣥࣇ࢕ࣝࢱ࣮࡛ࢁ㐣ࡋ࡚ࠊࢁᾮᡂศ࡜ࣇ࢕ࣝࢱ࣮ṧ´ᡂศ࡟ࢁูࡋࡓࠋࢁᾮᡂศ࡟ࡣࢪࢡࣟࣟ㓑㓟(DCA)ࢆຍ࠼ࠊ⏕ࡌࡓ EMF ࢔ࢽ࢜ࣥࢆ୰ᛶ໬ࡋࠊ⵨
␃Ỉ࡟ࡼࡿࢹ࢝ࣥࢸ࣮ࢩ࡛ࣙࣥṧᏑࡍࡿ DCA ࢆ㝖ཤࡋࡓࠋࡇࢀࡽࡢ⁐ᾮࡢᨺᑕ⬟ࢆ Ge ༙ᑟయ᳨ฟჾ࡛ ᐃࡍࡿࡇ࡜࡛ EMF ඲యࡢᅇ཰⋡ࢆỴᐃࡋࡓࠋࣇ࢕ࣝࢱ࣮ṧ´ᡂศࡣࠊCS2 ࡛ᅇ
཰ࡋྠᵝ࡟ᨺᑕ⬟ࢆ ᐃࡋࡓࠋࡲࡓࠊẚ㍑ᑐ㇟࡜ࡋ࡚ La ࢆྵࡴⅣ⣲Წࢆ࢔࣮ࢡᨺ㟁ࡍࡿࡇ࡜࡛ࣇ࣮ࣛࣞࣥࢆྜᡂࡋࠊྠᵝࡢᡭ㡰࡛ศ㞳ࢆ⾜࠸ࠊࢁᾮᡂศࢆࢺ࢚ࣝࣥ࡟⨨᥮ࡋ࡚ HPLC ศᯒ(࣒࢝ࣛ㸸Buckyprepࠊ⛣ື┦㸸ࢺ࢚ࣝࣥࠊὶ㏿㸸3.2 mL͑min-1)ࢆ⾜ࡗࡓࠋᚓࡽࢀࡓ HPLC ࢡ࣐ࣟࢺࢢ࣒ࣛࡢࣆ࣮
ࢡ㠃✚࠿ࡽ La@C82 ࡢศ㞳ຠ⋡ࢆẚ㍑ࡋࡓࠋ
C60
C70
䛆⤖ᯝ䞉⪃ᐹ䛇㻌 ᅗ 1 ࡣࡑࢀࡒࢀࡢᴟᛶ⁐፹࡛ศ㞳ࡋࡓࢁ
C76
C82, 84ᾮᡂศ࡜ศ㞳๓ヨᩱࡢ HPLC ࢡ࣐ࣟࢺࢢ࣒ࣛཬࡧྛᡂศ
La@C
C82࠿ࡽ᳨ฟࡉࢀࡓᨺᑕ⬟ࡢศ㞳๓ヨᩱ࡟ᑐࡍࡿ๭ྜࢆ♧(d)ࡋ࡚࠸ࡿࠋHPLC ࢡ࣐ࣟࢺࢢ࣒ࣛ࠿ࡽ MeCN/TEA ࢆ⏝࠸࡚ศ㞳ࢆ⾜࠺࡜ La@C82 ࡟ࡘ࠸࡚ࡣ⣙ 80%ᅇ཰ࡍࡿࡇ࡜
(c)ࡀ࡛ࡁࠊ኱㔞࡟Ꮡᅾࡍࡿ C60, C70 ࢆ 99%௨ୖ㝖ཤࡍࡿࡇ(b)࡜ࡀฟ᮶ࡿࡇ࡜ࡀศ࠿ࡗࡓࠋࡉࡽ࡟ࠊMeCN ࡛ࡣ EMF ඲యࡢ 50%௨ୖࢆࢁᾮᡂศ࡜ࡋ࡚ᅇ཰ࡍࡿࡇ࡜ࡀྍ⬟࡛(a)࠶ࡿࡇ࡜ࡶศ࠿ࡗࡓࠋࡇࡢࡇ࡜࠿ࡽࠊMeCN ࡣ⏝࠸ࡓᴟ
0
20
40
60
80
ᛶ⁐፹ࡢ୰࡛᭱ࡶຠ⋡ⓗ࡟ EMF ࡜✵ࣇ࣮ࣛࣞࣥࡢศ㞳
Retention Time / minࡀฟ᮶ࡿ࡜⪃࠼ࡽࢀࡿࠋ
ᅗ 1 (a)MeCN/TEA, (b)MeOH/TEA,(c)EtOH/TEA ࢆ⏝࠸ࡓศ㞳ᚋࡢࢁᾮᡂ
[1] ༓ⴥ࿴႐, 㤳㒔኱Ꮫᮾி኱Ꮫ㝔 ಟኈㄽᩥ (2015).
ศࠊ(d)ศ㞳๓ࡢࣇ࣮ࣛࣞࣥ⢒ᢳฟ≀ࡢ
HPLC ࢡ࣐ࣟࢺࢢ࣒ࣛཬࡧ EMF ඲యࡢྛᡂศࡢ๭ྜ

Development of metallofullerne separation by chemical reduction
TANAKA, K., AKIYAMA, K., HABA, H.

- 58 -



2B03㓟⣲ࠊ◲㯤ཎᏊ࡬ࡢ࣑ࣗ࢜ࣥᤕ⋓☜⋡ࡢศᏊ࡟ࡼࡿኚ໬
㜰኱㝔⌮ ࠊཎᏊຊᶵᵓ ࠊ㧗࢚ࢿ◊ ࠊᅜ㝿ᇶ╩ᩍ኱  ‫⏣ྜྷۑ‬๛ ࠊ஧ᐑ࿴ᙪ ࠊ✄ᇉㄔ ࠊఀ⸨Ꮥ ࠊ㧨ᮏர ࠊࢫࢺࣛࢵࢧ࣮࣭ࣃࢺࣜࢵࢡ ࠊἙᮧᡂ⫕ ࠊୗᮧᾈ୍㑻 ࠊ୕Ꮿᗣ༤ ࠊ୕ᾆኴ୍ ࠊஂಖㅬဢ ࠊ⠛ཎཌ 䛆⥴ゝ䛇 㟁Ꮚ࡜ྠࡌࣞࣉࢺࣥ࡟ᒓࡍࡿ⣲⢏Ꮚ࣑ࣗ࢜ࣥࡣࠊ㟁Ꮚ࡜ྠࡌ㟁Ⲵࠊ㟁Ꮚࡢ 200 ಸࡢ㉁㔞ࢆᣢࡘࠋ㈇ࡢ㟁Ⲵࢆᣢࡘ࣑ࣗ࢜ࣥࡀཎᏊ᰾ࡢṇ㟁Ⲵ࡟ᤕ⋓ࡉࢀࡿ࡜ࠊᅛ᭷ࡢ㌶㐨ࢆᣢࡘ࣑ࣗ࢜ࣥཎᏊࢆᙧᡂࡍࡿࠋ࣑ࣗ࢜ࣥཎᏊ㌶㐨ࡣ㠀ᖖ࡟ᑠࡉ࡞㌶㐨༙ᚄࢆᣢࡘ࡟ࡶ࠿࠿ࢃࡽࡎࠊ
ཎᏊ࡟ࡼࡿ࣑ࣗ࢜ࣥࡢᤕ⋓㐣⛬ࡣ㌶㐨㟁Ꮚࡢᙳ㡪ࢆཷࡅࡿࡇ࡜ࡀ▱ࡽࢀ࡚࠸ࡿࠋᐇ㝿ࠊᡃࠎࡢ㐣ཤࡢ◊✲࡛ࡶ CO ࡜ CO2 ࡛ࠊཎᏊ୍ࡘᙜࡓࡾࡢ O ཎᏊ࡟ᑐࡍࡿ C ཎᏊࡢ┦ᑐⓗ࡞ᤕ⋓⋡ࡀ 40%ࡶኚ໬ࡍࡿࡇ࡜ࢆሗ࿌ࡋ࡚ࡁࡓ[1]ࠋ࣑ࣗ࢜ࣥཎᏊᙧᡂ㐣⛬࡟ࡣࠊࡶ࠺୍ࡘࣘࢽ࣮ࢡ࡞
㐣⛬ࡀᏑᅾࡋ࡚࠾ࡾࠊ࣑ࣗ࢜ࣥ㌿⛣㐣⛬࡜࿧ࡤࢀ࡚࠸ࡿࠋࡇࢀࡣࠊ୍ᗘỈ⣲ཎᏊ࡟ᤕ⋓ࡉࢀࡓ࣑ࣗ࢜ࣥࡀ⛣ືࡍࡿ཯ᛂ࡛࠶ࡿࠋ࣑ࣗ࢜ࣥ㌿⛣㐣⛬࡛ࡣ࣑ࣗ࢜ࣥỈ⣲ࡢ⤖ྜ࢚ࢿࣝࢠ࣮(2.1keV)௨ୖࡢ࢚ࢿࣝࢠ࣮ࢆᣢࡘ㌶㐨࡟ࡋ࠿࣑ࣗ࢜ࣥࡀᤕ⋓ࡉࢀ࡞࠸ࡓࡵࠊ࣑ࣗ࢜ࣥࡀཎᏊ࡟┤᥋ᤕ⋓ࡉࢀࡿ࡜ࡁ࡜␗࡞ࡾࠊ㌿⛣ඛཎᏊࡢ㟁Ꮚ≧ែࡢᙳ㡪ࢆཷࡅ࡟ࡃ࠸࡜ࡉࢀ࡚࠸ࡿࠋᡃࠎ
ࡣࡇࢀࡲ࡛ࠊCOࠊCO2 ࢆᑐ㇟࡜ࡋࡓᐇ㦂ࢆ⾜ࡗ࡚ࡁࡓࡀࠊ௒ᅇ᪂ࡓ࡟ࠊCOS ࡜ CS2 ࢆᑐ㇟࡜ࡋ࡚ࠊ┤᥋ᤕ⋓㐣⛬࠾ࡼࡧ㌿⛣㐣⛬࡛ᤕ⋓ࡉࢀࡓ࣑ࣗ࢜ࣥࡢึᮇ≧ែࢆㄪ࡭ࡓࡢ࡛ሗ࿌ࡍࡿࠋ
䛆ᐇ㦂䛇 ᮏᐇ㦂ࡣⲈᇛ┴ᮾᾏᮧࡢ J-PARC ≀㉁⏕࿨⛉Ꮫᐇ㦂᪋タ࣑ࣗ࢜ࣥᐇ㦂᪋タ(MUSE)
D1 ࣅ࣮࣒ࣛ࢖࡛ࣥ⾜ࡗࡓࠋCS2 ࢆ 20 kPa ࡛඘ሸࠊࡶࡋࡃࡣࠊH2 ࢞ࢫ࡟ COS ࠾ࡼࡧࠊCS2 ࢆ
1%ࡢΰྜẚ࡛ΰࡐࡓ࢞ࢫ(99 kPa)ࢆヨᩱ࡜ࡋࠊ࢞ࢫࢳ࢙ࣥࣂ࣮(ᐜ✚ 7.0 L)࡟ᑒධᚋࠊ࣑ࣗ࢜
ࣥࣅ࣮࣒ࢆ↷ᑕࡋࡓࠋ࣑ࣗ࢜ࣥ⬺ບ㉳ࡢ㝿࡟ᨺฟࡉࢀࡿ࣑ࣗ࢜ࣥ≉ᛶ X ⥺ࢆࢤ࣐ࣝࢽ࣒༙࢘
ᑟయ᳨ฟჾ࡛ ᐃࡋࠊࡑࢀࡒࢀࡢࢧࣥࣉࣝ࡟ࡘࡁ 9㹼14 ᫬㛫 ᐃࢆ⾜ࡗࡓࠋ䛆⤖ᯝ䛇 ౛࡜ࡋ࡚ࠊCS2 ࡢ S ཎᏊ࡟ᤕ⋓ࡉࢀࡓ࣑ࣗ࢜ࣥࡀᨺฟࡍࡿ࣑ࣗ࢜ࣥ≉ᛶ X ⥺(Balmer ⣔ิ)ࢆ KαX ⥺࡛つ᱁໬ࡋࡓᙉᗘ࡜ࡋ࡚ᅗ 1 ࡟♧ࡍࠋ┤᥋ᤕ⋓㐣⛬ࡣ࣑ࣗ࢜ࣥࡀ┤᥋ CS2 ࡢ S ཎᏊ࡟ᤕ⋓ࡉࢀࡓ᫬ࡢࠊ㌿⛣㐣⛬ࡣ࣑ࣗ࢜ࣥỈ⣲࠿ࡽ S
ཎᏊ࡬ࡢ㌿⛣࡟ࡼࡾᤕ⋓ࡉࢀࡓ᫬࡟Ⓨࡍࡿ X ⥺࡛࠶ࡿࠋ㌿⛣㐣⛬࡛ࡣࡢ LαX ⥺ᙉᗘࡀ┤᥋ᤕ⋓
ࡢ 10 ศࡢ 1 ௨ୗ࡛࠶ࡿࡇ࡜ࡀ♧ࡉࢀࠊࡇࢀࡣࠊ
࣑ࣗ࢜ࣥࡀᤕ⋓ࡉࢀࡓึᮇࡢ㔞Ꮚ≧ែࡀ␗࡞ࡿ
ࡇ࡜ࢆ⾲ࡋ࡚࠸ࡿࠋㅮ₇࡛ࡣࠊࡇࡢ⤖ᯝࡢ௚࡟ࡶ௨๓⾜ࡗࡓ CO2 ࡢ⤖ᯝ࡜ྜࢃࡏ࡚ࠊCࠊOࠊS࠿ࡽᡂࡿ┤⥺≧㸱ཎᏊศᏊ࡬ࡢ࣑ࣗ࢜ࣥᤕ⋓࡟ᅗ 㻝㻌㻯㻿㻞 䛾 㻿 ཎᏊ䛻ᤕ⋓䛥䜜䛯䝭䝳䜸䞁䛜Ⓨ䛩䜛䝭䝳ࡘ࠸࡚ࠊศᏊᵓ㐀ࡢ㐪࠸࡟ࡼࡿᤕ⋓㐣⛬ࡢኚ໬䜸䞁≉ᛶ 㼄 ⥺䛾ᨺฟ䝟䝍䞊䞁㻔㻮㼍㼘㼙㼑㼞 ⣔ิ㻕䚹㻔㻞㻙㻝㻕䛿ࢆ㆟ㄽࢆࡍࡿணᐃ࡛࠶ࡿࠋ
䝭䝳䜸䞁䛜୺㔞Ꮚᩘ 㼚㻩㻞 䛛䜙 㻝 䜈㑄⛣䛩䜛᫬䛻Ⓨ⏕䛩䜛 㼄 ⥺㻔㻷α ⥺㻕䜢ព࿡䛩䜛䚹㻌ཧ⪃ᩥ⊩[1] G. Yoshida et al., J. of Radioanal. and Nucl. Chem. 303 1277 (2015)
Muon capture probability of oxygen and sulfur atoms and differences attributed to the molecular
structure
YOSHIDA, G., NINOMIYA, K., INAGAKI, M., ITO, T.U., HIGEMOTO, W., STRASSER, P.,
KAWAMURA, N., SHIMOMURA, K., MIYAKE, Y., MIURA, T., KUBO, M.K., SHINOHARA, A.

- 59 -

ġ࣑ࣗ࢜ࣥཎᏊ⾪✺࡟࠾ࡅࡿ࣑ࣗ࢜ࣥゐ፹᰾⼥ྜ཯ᛂ⋡ࡢィ⟬% ᮾ໭኱⌮  ᮌ㔝ᗣᚿ㻌䛆⥴ゝ䛇㻌 㟁Ꮚࡢ  ಸࡢ㉁㔞ࢆࡶࡘ࣑ࣗ࢜ࣥࡀࡘࡃࡿ࣑ࣗ࢜ࣥศᏊࡣࠊඖࡢཎᏊ࡜ẚ࡭᮰⦡࢚ࢿࣝࢠ࣮ࡀ࡯ࡰ  ಸࠊ኱ࡁࡉࡣ  ศࡢ  ࡢᙉࡃ᮰⦡ࡉࢀࡓࢥࣥࣃࢡࢺ࡞⣔࡜࡞ࡿࠋࡇࡢ
ࡓࡵ᰾㛫㊥㞳ࡀ▷ࡃ࡞ࡾࠊ᰾㛫ࡢἼື㛵ᩘࡢ୍㒊ࡀࢡ࣮ࣟࣥ㞀ቨࡢෆഃࡢ᰾ຊࡀస⏝ࡍࡿ㡿ᇦ࡛᭷ព࡞್ࢆࡶࡕࠊ࣑ࣗ࢜ࣥศᏊෆ࡛᰾཯ᛂࡀ࠾ࡇࡿࠋ࣑ࣗ࢜ࣥࡣࠊ࠶ࡓ࠿ࡶ᰾཯ᛂࢆゐ፹ࡋ࡚࠸ࡿࡼ࠺࡟ぢ࠼ࡿࡓࡵࠊ࣑ࣗ࢜ࣥゐ፹᰾⼥ྜࠕPXRQFDWDO\]HGIXVLRQ&)ࠖ࡜ࡼࡤࢀ࡚
࠸ࡿ>@ࠋ ᖺ௦ᮎ࡟ࡣ࢚ࢿࣝࢠ࣮⏕⏘ࡢᐇ⌧ᛶ࠿ࡽ኱ࡁࡃὀ┠ࢆ㞟ࡵࡓࡇ࡜ࡶ࠶ࡗࡓࡀࠊ
࣑ࣗ࢜ࣥࡀ᰾཯ᛂ࡛⏕ᡂࡋࡓ࣒࣊ࣜ࢘ཎᏊ᰾࡜⤖ྜࡋࠊ&) ࡢࢧ࢖ࢡࣝ࠿ࡽእࢀࡿࠕ࣑ࣗ࢜
ࣥ௜╔ࠖ࡜ࡼࡤࢀࡿ㐣⛬࡟ࡼࡾ⌧ᅾ࡛ࡣ࢚ࢿࣝࢠ࣮⏕⏘ࡣᅔ㞴࡜ࡉࢀ࡚࠸ࡿࠋ࣑ࣗ࢜ࣥ࣊ࣜ
࣒࢘ཎᏊ࡜Ỉ⣲ཎᏊ᰾࡜ࡢ㧗࢚ࢿࣝࢠ࣮⾪✺࡟ࡼࡾ࣑ࣗ࢜ࣥࡀ࣒࣊ࣜ࢘ཎᏊ᰾ࡢ᮰⦡ࢆእࢀ
⮬⏤࡟࡞ࡾࠊ෌ࡧ &) ࢧ࢖ࢡࣝ࡟ᡠࡿࠕ࣑ࣗ࢜ࣥ෌άᛶ໬ࠖ࡜ࡼࡤࢀࡿ㐣⛬ࡀ࠶ࡿࠋ୍᪉ࠊ
㔜Ỉ⣲࣭୕㔜Ỉ⣲ΰྜ⣔ࡢ &) ࡛ࡣࠊGW Ѝ DQ0H9 ཯ᛂ࡟ࡼࡿ 0H9 ࡢ༢Ⰽ୰ᛶᏊࡀ୍ࡘࡢ࣑ࣗ࢜ࣥ࠿ࡽ᭱኱  ಶᚓࡽࢀ࡚࠸ࡿࠋࡇࡢ୰ᛶᏊࡣ฼⏝౯್ࡀ㧗ࡃࠊཎᏊ⅔ࠊ᰾◚○཯ᛂ࡟ḟࡄ➨  ࡢ୰ᛶᏊ※࡜ࡋ࡚ࠊࡇࢀࡲ࡛࡟ࡶཎᏊ⅔୰ᛶᏊ※ࠊ᰾⼥ྜ⅔࡞࡝ࡢᮦᩱ◊✲ࠊ㛗ᑑ࿨᰾ᗫᲠ≀ࡢᾘ⁛ฎ⌮࡬ࡢᛂ⏝◊✲ࡀᖹ⾜ࡋ࡚⾜ࢃࢀ࡚ࡁࡓࠋ᭱㏆ࠊ㈇࣑ࣗ࢜
ࣥࡢ⏕ᡂຠ⋡ࡀྥୖࡋࠊᾘ⁛ฎ⌮ࡢࡓࡵࡢ୰ᛶᏊ※࡜ࡋ࡚ࡶ &) ࡀ෌ࡧὀ┠ࢆ࠶ࡘࡵࡘࡘ࠶
ࡿࠋᮏ◊✲࡛ࡣࠊ㧗㠀ᆒ୍ࣉࣛࢬ࣐୰࡛㉳ࡇࡿ࣑ࣗ࢜ࣥཎᏊ⾪✺୰ࡢ᰾⼥ྜ཯ᛂ⋡ࡢィ⟬ࢆ⾜ࡗࡓࠋ㠀ᆒ୍ࣉࣛࢬ࣐୰ &) ࡛ࡣࠊ࣑ࣗ࢜ࣥ௜╔ࡢ☜⋡ࡀῶᑡࡋࠊ࣑ࣗ࢜ࣥ෌άᛶ໬ࡢ
☜⋡ࡀቑຍࡋࠊ㧗࠸⇕஺᥮ຠ⋡ࡶᮇᚅࡉࢀ࡚࠸ࡿࠋ
䛆ィ⟬䛇 ࣑ࣗ࢜ࣥ㔜Ỉ⣲ཎᏊ G V ࡜୕㔜Ỉ⣲ཎᏊ᰾ W ࡢᙎᛶ⾪✺ G VW Ѝ G VW ࡜⤌᭰࠼⾪✺ G VW Ѝ G W VH9 ࠾ࡼࡧࡑࢀࡽࡢ㏫཯ᛂࡢィ⟬ࢆ⾜ࡗࡓࠋ᰾㛫┦஫స⏝
ࡣࠊG  W ᩓ஘ࡢ᩿㠃✚ࢆ෌⌧ࡍࡿගᏛ࣏ࢸࣥࢩࣕࣝࢆ᥇⏝ࡋࡓࠋࡲࡓࠊ᰾⼥ྜࢳࣕࢿࣝࡣࠊ
ගᏛ࣏ࢸࣥࢩࣕࣝࡢ⹫㒊࡟ࡼࡿ྾཰࡛⾲⌧ࡋࡓࠋ࣑ࣗ࢜ࣥࡢ㉁㔞ࡣཎᏊ᰾ࡢ㉁㔞࡜ẚ࡭࡚↓どฟ᮶࡞࠸ࡓࡵࠊ㏻ᖖࡢཎᏊ⾪✺࡛⏝࠸ࡽࢀࡿ᩿⇕㏆ఝࡀ㐺ᛂ࡛ࡁ࡞࠸ࠋࡇࡢࡓࡵࠊᡃࠎࡀ
㛤Ⓨࡋࡓ㠀᩿⇕⤌᭰࠼ࢳࣕࢿࣝࡢィ⟬ἲ㸦࢞࢘ࢫ㛵ᩘᒎ㛤ἲ>@㸧࡟ࡼࡾཝᐦ࡞㔞Ꮚ୕య⣔ࡢィ⟬ࢆ⾜ࡗࡓࠋࡲࡓࠊ࣑ࣗ࢜ࣥ௜╔ࡢ☜⋡ࢆ᰾㛫㊥㞳ࡀࢮࣟ࡟࡞ࡿᴟ㝈࡛ࡢἼື㛵ᩘ࡜࣑࣒ࣗ࢜ࣥ࣊ࣜ࢘ཎᏊ㌶㐨࡜ࡢ㔜࡞ࡾ࠿ࡽィ⟬ࡋࡓࠋ䛆⤖ᯝ䛇 ᚑ᮶ࡢ &) ࡢ ᗘ᮲௳ ࠥ. ࡜ࡃࡽ࡭ࠊ㧗 ᮲௳㸦ࠥ.㸧࡛ࡣࠊ⾪✺୰᰾
⼥ྜ⋡ࡣ஧᱆௨ୖቑຍࡋࠊ࣑ࣗ࢜ࣥ௜╔ࡢ☜⋡ࡣ୍᱆ῶᑡࡋࡓࠋ௒ᅇᚓࡽࢀࡓィ⟬⤖ᯝࡣࠊ௒ᚋࡢᐇ㦂᮲௳ࡢ᭱㐺໬࡟฼⏝ࡉࢀࡿࠋ
>@ .1DJDPLQHIntroductory Muon Science&DPEULGJH8QLYHUVLW\3UHVV >@(+L\DPD<.LQR0.DPLPXUDProg. Part. Nucl. Phys.  &DOFXODWLRQVRIPXRQFDWDO\]HGIXVLRQUHDFWLRQUDWHLQPXRQDWRPLFFROOLVLRQV
.,12<- 60 -



2B05

ᦤືゅ┦㛵ἲ࡟ࡼࡿ୙⣧≀ࢆࢻ࣮ࣉࡋࡓᅄ㓟໬୕㕲ࡢᒁᡤሙほᐹ㔠ἑ኱㝔⮬↛ ࠊ㔠ἑ኱⌮ᕤ  ‫➉ۑ‬୰⪽ử ࠊ⸨⃝↷ຌ ࠊబ⸨΅ R(t)䛆䛿䛨䜑䛻䛇
ᅄ㓟໬୕㕲㸦Fe3O4ࠊ࣐ࢢࢿࢱ࢖ࢺ㸧ࡣ࣮࢟ࣗࣜ ᗘ(TC = 858 K)௨ୗ࡛ࣇ࢙ࣜ☢ᛶࢆ♧ࡍࠋᕤᴗⓗᛂ⏝ࡢྍ⬟ᛶ࠿ࡽࠊࢻ࣮ࣆࣥࢢ࡟ࡼࡾ☢ᛶࡸ㟁Ẽ≉ᛶࢆไᚚࡍࡿヨࡳࡀࡉ࠿ࢇ࡟⾜ࢃࢀ࡚࠸ࡿࠋࡑࡢࡼ࠺࡞◊✲࡟࠾࠸࡚ࠊ୙⣧≀ඖ⣲ࡢ࣍ࢫࢺ≀㉁୰࡛ࡢ⨨᥮఩⨨ࡸࡑࡢືⓗᣲື࡟㛵ࡍࡿ᝟ሗࡣ኱ኚ㔜せ࡛࠶ࡿࠋᡃࠎࡣඛ⾜◊✲࡟࠾࠸࡚ࠊFe3O4 ࡟୙⣧≀࡜ࡋ࡚ᑟධࡋࡓ
ࣉ࣮ࣟࣈ᰾ 111In(Ѝ111Cd)ཎᏊࡀ ᗘ࡟౫Ꮡࡋ࡚ࢧ࢖ࢺ⛣ືࡍࡿ࡜࠸࠺⯆࿡῝࠸⌧㇟ࢆほ ࡋࡓࠋࡑࡢ୍᪉ࠊ111mCd(Ѝ111Cd)ࣉ࣮ࣟࣈࡣ ᗘ࡟౫Ꮡࡏࡎࠊ୍ᐃࡢࢧ࢖ࢺ࡟␃ࡲࡗ࡚࠸ࡿࡇ࡜
ࢆ☜ㄆࡋࡓࠋࡇࢀࡽࡢ⌧㇟ࢆࡼࡾ῝ࡃ㏣ཬࡍࡿࡓࡵ࡟ࠊᮏ◊✲࡛ࡣࠊ㠀ᨺᑕᛶ Cd ࢆ୙⣧≀࡜ࡋ࡚ࢻ࣮ࣉࡋࡓ Fe3O4 ෆ࡟ 111In(Ѝ111Cd)ࢆࣉ࣮ࣟࣈ᰾࡜ࡋ࡚ᑟධࡋࠊᦤືゅ┦㛵(PAC)ἲࢆ⏝࠸࡚ࠊFe3O4 ୰ࡢ 111Cd ఩⨨࡟࠾ࡅࡿᒁᡤ⎔ቃࢆㄪ࡭ࡓࠋ
䛆ᐇ㦂䛇
Fe3O4 ⢊ᮎ࡜ CdO ⢊ᮎࢆཎᏊᩘẚ Fe : Cd = 99.5 : 0.5 ࡜࡞ࡿศ㔞࡛ΰྜࡋࠊ㘄๣ᡂᙧࡋ࡚▼ⱥ⟶࡟┿✵ᑒධࡋࠊ1173 K ࡛ 45 ศ㛫↝ᡂࡋࡓࠋ▼ⱥ⟶ࢆ㛤ᑒࡋ࡚ࡍࡾࡘࡪࡋࡓࡶࡢࢆ෌ࡧ㘄๣ᡂᙧࡋࠊ111In ሷ㓟⁐ᾮࢆ⁲ୗࡋ࡚ࠊ▼ⱥ⟶࡟┿✵ᑒධᚋࠊ1173 K ࡛ 45 ศ㛫↝ᡂࡋࡓࠋᚓࡽ
ࢀࡓヨᩱ࡟ᑐࡋ࡚ᐊ ࠿ࡽ 1173 K ࡢ ᗘ⠊ᅖ࡛ PAC ᐃࢆ⾜ࡗࡓࠋ䛆⤖ᯝ䛸⪃ᐹ䛇Fig.1 ࡣࡑࢀࡒࢀᐊ ࠊ773 Kࠊ873 K ࡛ ᐃࡋࡓ PAC ࢫ࣌ࢡࢺ࡛ࣝ࠶ࡿࠋ
 TC ௨ୗ(Fig.1b,1c)ࡢ PAC ࢫ࣌ࢡࢺࣝࡣࠊ࿘Ἴᩘ
a. 873 Kศᕸࡢ␗࡞ࡿ 2 ࡘࡢ☢Ẽ཮ᴟᏊ┦஫స⏝ࢆ௬ᐃࡋࡓࣔࢹ࡛ࣝࣇ࢕ࢵࢸ࢕ࣥࢢࡋࡓࠋMatos ࡽ[1]ࡀ㏙࡭ࡿࡼ࠺࡟ࠊ࿘Ἴᩘศᕸࡢ኱ࡁ࡞ᡂศࡣ
Fe3O4 ⢏Ꮚ⾲㠃ࡸ⢏⏺㡿ᇦ(“shell”)࡟Ꮡᅾࡍࡿࣉ
b. 773 K࣮ࣟࣈ᰾࡟ࠊ࿘Ἴᩘศᕸࡀᑠࡉ࡞ᡂศࡣ⢏Ꮚෆ㒊ࡢ㡿ᇦ(“core”)ࡢ㝧࢖࢜ࣥ఩⨨ࢆ⨨᥮ࡋࡓࣉ࣮ࣟ
ࣈ᰾࡟⏤᮶ࡍࡿ࡜⪃࠼ࡽࢀࡿࠋ
 TC ௨ୖ(Fig.1a)ࡢ PAC ࢫ࣌ࢡࢺࣝ࡟࠾࠸࡚ࡣࠊ
c. R.T.
⇕ᨐ஘࡟ࡼࡾ㉸ᚤ⣽☢ሙࡀᾘኻࡋࡓࡓࡵ☢Ẽ཮ᴟᏊ┦஫స⏝࡟⏤᮶ࡍࡿᦤືࣃࢱ࣮ࣥࡣぢ࠼࡞ࡃ࡞ࡗࡓࠋࡲࡓࠊ᪂ࡓ࡟ືⓗ⦆࿴ࡢࣃࢱ࣮ࣥࢆほࡋࡓࠋࡇࢀࡣ TC ௨ୗ࡛ほ ࡉࢀࡓ shell ᡂศ࡟ࡼࡿࡶࡢ࡜ᛮࢃࢀࡿࠋⓎ⾲࡛ࡣࡉࡽ࡟ヲ⣽࡞ゎᯒ⤖ᯝࢆሗ࿌ࡍࡿࠋ
Time / ns
Fig.1 ྛ

ᗘ࡟࠾࠸࡚

ᐃࡉࢀࡓࠊ

0.5 at.% Cd ࢻ࣮ࣉ Fe3O4 ୰ 111In(Ѝ[1] I. T. Motos et.al., J.Appl. Phys., 117, 17D511(2015).

111Cd)ࡢ PAC ࢫ࣌ࢡࢺࣝ

Observation of local fields in impurity-doped magnetite by means of perturbed angular correlation
spectroscopy
TAKENAKA, S., FUJISAWA, T., SATO, W.

- 61 -



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 >B<6109j?C2Cèa³ôAMnO3õ$À¤áÃ" (!ï¤äma,à|nÀ¤^ôCMRõ.Á ½*-, ?C2Cèa³.¢Î  ·,'"$ :@3#³ k"]À¤´ .Óº"Û&, éÒ !, ¾Å$?C2Cèa³#J(ñÏ! CMR ^.Á
La0.7Ca0.3MnO3ôTC ~ 250 Kõ.¾Åtß  =BE< ¡ê#v Ä.Ø"wV Ê_Ö¼í§ôPACõ")=BE<QÌ#àÈl.«p UÑ¾
Å" A 409"wV 140Ce( 140La)QÌ",WæÀl.«p, "\,[1] #£âºn!Àl#¹$*"!! ¾Å$
A 409.Ì, -, 111Cd( 111mCd).Ø"wVzl.«p ðÀ=BE<QÌ# transferred field #°.Û& I=BE<#É.£â, .
»º qò.Ñ[2] La0.7Ca0.3MnO3 $NG#i¼de La2O3 MnO2 )% CaCO3 .~ÙêÂê¨e 1273 K #O±É"X%¨eDì[j 1473 K ±É #ÇöÊh§ Àa«p")+»º#Øe-, .¿Ú 111Cd(
111mCd)=BE<"$ Mn®" 110Cd ­Ë CdO "J o.²v,Ô# 111mCd .¶ #v #Ç Cd(111mCd)O . La0.7Ca0.3MnO3 ¨e Æ¤J 1373 K ±ÉØ"=BE<.wV PAC «p"$ BaF2 5C8AE7"),
# 4 Yg§.· áÃ¯.$/rª)% 77 K  PAC 6>39@. Fig. 1 " 77 K ", La0.7Ca0.3MnO3 J
111
Cd( 111mCd)# PAC 6>39@.Á áÃ¯NG#«pÉ ,' Àl ïl`ç.

OpbFZ×.Ñ #É =BE<QÌ"WæÀl Bhf < 0.014 T Õ«- -$ 140Ce( 140La)QÌ",-)+(å"x!T , 111Cd-O-Mn #ÉeÖ 90"ã 6;Cs}#Px .Í,ðÀ =BE<QÌ##






x!WæÀl$y(*T , Ý¬
$ 111Cd( 111mCd)=BE<#c409!*%"î, Mn *# transferred field  140Ce(
Fig. 1. PAC spectrum of 111Cd( 111mCd) in
140
La)=BE<# 4f ïo"H,^"Þ
La0.7Ca0.3MnO3 obtained at 77 K.
Ü,
[1] W. Sato, N. Ochi, A. Taniguchi, T. Terai, T. Kakeshita, A. Shinohara, and Y. Ohkubo, J. Nucl.
Radiochem. Sci. 8, 89 (2007).
[2] W. Sato, S. Komatsuda, A. Osa, T. K. Sato, and Y. Ohkubo, Hyperfine Interact. in press.
Local fields at impurity sites in a perovskite La0.7Ca0.3MnO3SATO, W., KOMATSUDA, S., OHKUBO, Y.

- 62 -

2B07

ZnO ࡢ㓟⣲✵Ꮝᙧᡂ㐣⛬࡟࠾ࡅࡿ㞺ᅖẼ౫Ꮡᛶ୍㛵㧗ᑓ ࠊ㔠኱⌮ᕤ ࠊி኱⅔  ‫ۑ‬ᑠᯇ⏣Ἃஓຍ ࠊబ⸨΅ ࠊ኱ஂಖ჆㧗 䛆䛿䛨䜑䛻䛇㓟໬ள㖄(ZnO)ࡣࢻࢼ࣮࡜࡞ࡿ 13 ᪘ඖ⣲(In,Ga,Al)ࡢ୙⣧≀ࡸヨᩱㄪ〇᫬࡟ᙧᡂࡉࢀࡿ
㓟⣲✵Ꮝ࡜࠸ࡗࡓ᱁ᏊḞ㝗ࡢᏑᅾ࡟ࡼࡾ༙ᑟయ≀ᛶࡀྥୖࡍࡿ࡜࠸ࢃࢀ࡚࠸ࡿࡓࡵࠊZnO ୰ࡢ㓟⣲✵Ꮝࡸ୙⣧≀ࢻࢼ࣮ࡀᯝࡓࡍᶵ⬟ࠊᒁᡤᵓ㐀ࠊࡑࡢ⇕ⓗᣲື࡟ࡘ࠸࡚⯆࿡ࡀᣢࡓࢀ࡚࠸ࡿࠋࡑ
ࡇ࡛ᡃࠎࡣࠊZnO ࡟ 111In(Ѝ111Cd)ࢆᑟධࡋࠊࡇࢀࢆࣉ࣮ࣟࣈ࡜ࡋ࡚⏝࠸ࡓ γ ⥺ᦤືゅ┦㛵(TDPAC)
ἲ࡟ࡼࡾ ZnO ࡢᒁᅾ㔞Ꮚᵓ㐀ࢆ◊✲ࡋ࡚࠸ࡿࠋඛ⾜◊✲࡟࠾࠸࡚ 111In(→111Cd)ࣉ࣮ࣟࣈࢆ⏝࠸ࡓ
TDPAC ᐃ࡟ࡼࡾࠊAl ࡜ In ࢆ୙⣧≀࡜ࡋ࡚ᑟධࡋࡓ ZnO ୰ࡢ୙⣧≀ࡢᒁᡤᵓ㐀ࢆㄪ࡭ࡓ[1-3]ࠋ
ࡑࡢ⤖ᯝࠊ✵Ẽ୰࡛ࡢ⇕ฎ⌮࡟ࡼࡾ ZnO ୰࡟ᙧᡂࡉࢀࡓ୙⣧≀ Al ࡜ In ࡢ఍ྜࡀࠊᕼⷧ㓟⣲⃰ᗘ᮲௳ୗ࡟࠾ࡅࡿ⇕ฎ⌮࡟క࠺㓟⣲✵Ꮝࡢᙧᡂ࡟ࡼࡗ࡚ゎ㞳ࡍࡿ⌧㇟ࢆ♧၀ࡍࡿ⤖ᯝࡀᚓࡽࢀࡓ
[2,3]ࠋᮏ◊✲࡛ࡣࡇࡢゎ㞳ࡢᶵᵓࢆࡼࡾヲ⣽࡟⌮ゎࡍࡿࡓࡵࠊᕼⷧ㓟⣲⃰ᗘ᮲௳ୗ࡛➼ /ᙜ᫬࢔ࢽ࣮ࣜࣥࢢࢆ᪋ࡋࡓ 100 ppm Al-doped ZnO ࡟ࡘ࠸࡚ TDPAC ᐃࢆ⾜࠸ࠊゎ㞳཯ᛂࡢ᫬㛫౫Ꮡᛶ࠿ࡽࠊ཯ᛂࡢ㏿ᗘᐃᩘࢆồࡵࡓࠋࡉࡽ࡟㏿ᗘᐃᩘࡢ ᗘ౫Ꮡᛶࢆᇶ࡟ゎ㞳ࡢάᛶ໬࢚ࢿࣝࢠ࣮ࢆ
ぢ✚ࡶࡗࡓࠋ
䛆ᐇ㦂䛇 ZnO ࡟ Al(100 ppm)ࢆ✵Ẽ୰࡟࠾ࡅࡿᅛ┦཯ᛂ࡟ࡼࡗ࡚ᑟධࡋࡓࠋᚓࡽࢀࡓヨᩱ࡟ 111In ሷ㓟⁐ᾮࢆ⁲ୗࡋࠊ✵Ẽ୰ 1373 K ࡛ 2 ᫬㛫↝㕌ࡋࡓࠋ↝㕌ࡋࡓヨᩱࡢ࠺ࡕᩘᯛࢆࡉࡽ࡟┿✵୰ 1123
K ࡛ 1~25 ᫬㛫↝㕌ࡋ࡚ࡑࢀࡒࢀᐊ ࡛ PAC

ᐃࢆ⾜࠸ࠊゎ㞳཯ᛂࡢ᫬㛫౫Ꮡᛶࢆㄪ࡭ࡓࠋᚓࡽ

ࢀࡓࢫ࣌ࢡࢺࣝࢆゎᯒࡋࡓ⤖ᯝ࠿ࡽࠊ1123 K ࡟࠾ࡅࡿゎ㞳ࡢ㏿ᗘᐃᩘࢆぢ✚ࡶࡿࡇ࡜࡟ᡂຌࡋࡓࠋ
ṧࡾࡢヨᩱ࡟ࡘ࠸࡚ࡣࠊ┿✵୰ 873㹼1148 K ࡛ 24 ᫬㛫↝㕌ࡋࡓࡶࡢࢆࡑࢀࡒࢀᐊ ࡛ PAC
ࢆ⾜࠸ࠊゎ㞳཯ᛂࡢᗘ౫Ꮡᛶࢆㄪ࡭ࡓࠋᚓࡽࢀࡓࢫ࣌ࢡࢺࣝࡢゎᯒ⤖ᯝ࠿ࡽࠊྛ

ᐃ

ᗘ࡟࠾ࡅࡿ

ゎ㞳཯ᛂࡢ㏿ᗘᐃᩘࢆぢ✚ࡶࡗࡓࠋࡑࡢᚋࠊ┿✵୰࡜ྠᵝ࡟ᕼⷧ㓟⣲⃰ᗘ᮲௳࡛࠶ࡿ࢔ࣝࢦࣥ࢞
ࢫẼὶ୰࡛ྠᵝࡢᐇ㦂ࢆ⾜࠸ࠊゎ㞳཯ᛂࡢ㏿ᗘᐃᩘ࡟ࡘ࠸࡚ ᗘ౫Ꮡᛶࢆㄪ࡭ࡓࠋ
-410䛆⤖ᯝ䛸⪃ᐹ䛇Fig. 1 ࡣゎ㞳཯ᛂࡢ㏿ᗘᐃᩘࢆ⇕ฎ⌮in vacuumin argon gas

ᗘࡢ㏫ᩘ࡟ᑐࡋ࡚ࣉࣟࢵࢺࡋࡓࡶࡢ࡛࠶ࡿࠋࡲࡓࡇࡢ
ࣉࣟࢵࢺ࡟ᑐࡋࠊ࢔ࣞࢽ࢘ࢫࡢᘧࢆ⏝࠸࡚ࣇ࢕ࢵࢸ࢕
࡟࠾࠸࡚ࡣ 0.72(6) eVࠊ࢔ࣝࢦࣥẼὶ୰࡟࠾࠸࡚ࡣ
2.43(10) eV ࡜ぢ✚ࡶࡗࡓࠋゎ㞳཯ᛂࡣ ZnO ࡢ㓟⣲✵Ꮝk (s-1)

ࣥࢢࢆ⾜࠸ࠊゎ㞳཯ᛂࡢάᛶ໬࢚ࢿࣝࢠ࣮Ea ࢆ┿✵୰

-5

10

10-6

ᙧᡂ࡟ㄏ㉳ࡉࢀࡿ⌧㇟࡛࠶ࡿࡇ࡜࠿ࡽࠊࡇࡢ್ࡣ ZnO
ࡢ㓟⣲✵Ꮝᙧᡂ࢚ࢿࣝࢠ࣮࡟┦ᙜࡍࡿ್࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ⌮ㄽィ⟬࡟ࡼࡗ࡚ᚓࡽࢀࡓ┿✵୰࡟࠾ࡅࡿ㓟⣲✵Ꮝᙧᡂ࢚ࢿࣝࢠ࣮ࡢ್(0.8ࠊ1.0 eV)ࡀᮏᐇ㦂್࡟㏆࠸ࡇ࡜ࡣࠊゎ㔘ࡢጇᙜᛶࢆ♧၀ࡋ࡚࠸ࡿࠋᮏⓎ⾲࡛ࡣ㓟⣲✵Ꮝᙧᡂ࢚ࢿࣝࢠ್࣮ࡢ㐪࠸࠿ࡽࠊZnO ࡢ㓟⣲✵

-7

10

8

9

10
4

-1

10 /T (K )Fig. 1 Temperature dependence of the rate
constant, k. An Arrhenius equation was used
for the fit.

Ꮝᙧᡂ㐣⛬࡟࠾ࡅࡿ㞺ᅖẼ౫Ꮡᛶ࡟ࡘ࠸࡚⪃ᐹࡍࡿࠋ࠙ཧ⪃ᩥ⊩ࠚ
[1] S. Komatsuda, W. Sato, S. Kawata, and Y. Ohkubo, J. Phys. Soc. Jpn. 80, 095001 (2011)[2] S. Komatsuda, W. Sato, and Y. Ohkubo, J. Appl. Phys. 116, 183502 (2014)[3] S. Komatsuda, W. Sato, and Y. Ohkubo, J. Radioanal. Nucl. Chem. 303, 1249 (2015)

Atmosphere Dependence of Formation Process of Oxygen Vacancies in Zinc Oxide
KOMATSUDA, S., SATO, W., OHKUBO, Y.

- 63 -

11



2B08

㓟໬ள㖄༢⤖ᬗ୰ࡢ✵ᏍᆺḞ㝗࡟ᤕ⋓ࡉࢀࡓ୙⣧≀Ỉ⣲ࡢ⇕ⓗᣲື㔠ἑ኱㝔⮬↛ ࠊ㔠ἑ኱⌮ᕤ ࠊ㜰኱㝔⌮  ‫ۑ‬ΎỈᘯ㏻ ࠊబ⸨΅ ࠊ୕ཎᇶႹ
ࠊ⸨⃝↷ຌ ࠊ⚟⏣ග㡰 ࠊᯇከ೺⟇ 䛆⥴ゝ䛇 ᐊ ࡟࠾࠸࡚ 3.4 eV ࡢᗈ࠸ࣂࣥࢻࢠࣕࢵࣉࢆᣢࡘ㓟໬ள㖄(ZnO)ࡣࠊࡑࡢᛶ㉁࠿ࡽⓎගࢲ࢖࣮࢜ࢻࡸ㏱᫂㟁ᴟ࡞࡝ࡢᶵ⬟ᛶࢹࣂ࢖ࢫ࡬ࡢᛂ⏝ࡀᮇᚅࡉࢀ࡚࠸ࡿ༙ᑟయ≀㉁࡛࠶ࡿࠋ
ᶵ⬟ᛶࢹࣂ࢖ࢫࢆ〇㐀ࡍࡿ࡟࠶ࡓࡾࠊn ᆺ༙ᑟయ࡜ p ᆺ༙ᑟయࡀᚲせ࡜࡞ࡿࡀࠊ୍⯡࡟ ZnO
ࡣ n ᆺ༙ᑟయࡢᛶ㉁ࢆ♧ࡍࡓࡵࠊp ᆺ ZnO ࡢ〇㐀ࡀᅔ㞴࡜࡞ࡗ࡚࠸ࡿࠋn ᆺ༙ᑟయࡢᛶ㉁ࢆ
♧ࡍཎᅉࡢ୍ࡘ࡜ࡋ࡚୙⣧≀Ỉ⣲ࡀ࠶ࡾࠊࡑࡢ⃰ᗘࡣᑡ࡞ࡃ࡜ࡶ 0.3at.%࡜ࡢሗ࿌ࡶ࠶ࡿ[1]ࠋ
ࡇࡢ୙⣧≀Ỉ⣲ࡣ࢔ࢡࢭࣉࢱ࣮࡛࠶ࡿள㖄✵Ꮝ(VZn)࡜ࢡ࣮ࣟࣥ┦஫స⏝࡟ࡼࡾ」ྜయ(VZn +nH)ࢆᙧᡂࡋࠊp ᆺࡢᛶ㉁ࢆᢚไࡍࡿࠋࡑࡢࡓࡵࠊ୙⣧≀Ỉ⣲࡜✵ᏍᆺḞ㝗࡜ࡢ┦஫స⏝ࢆ◊✲ࡍࡿࡇ࡜ࡣࠊp ᆺ ZnO ࡢ㛤Ⓨ࡟࠾࠸࡚㔜せ࡜࡞ࡿࠋᚑࡗ࡚ࠊᮏ◊✲࡛ࡣ㝧㟁Ꮚᾘ⁛ᑑ࿨ศගἲ(PALS)ࢆ᥇⏝ࡋࠊ✵ᏍᆺḞ㝗ࢧ࢖ࢺࡢᚤどⓗほᐹࢆヨࡳࡓࠋࡇࢀࡲ࡛࡟ VZn + nH ࡢᏑᅾࡣሗ࿌ࡉࢀ࡚ࡁࡓࡀࠊᙧᡂ࣭ゎ㞳㐣⛬࡟ࡘ࠸࡚ࡣ༑ศ࡟㆟ㄽࡉࢀ࡚࠸࡞࠸ࠋࡑࡇ࡛ࠊVZn + nH
ࡢᙧᡂ࣭ゎ㞳㐣⛬ࡀ ZnO ࡢ≀ᛶ࡟୚࠼ࡿᙳ㡪ࢆ⌮ゎࡍࡿࡓࡵࠊ୙⣧≀Ỉ⣲࠾ࡼࡧ✵ᏍᆺḞ㝗ࡢ⇕ⓗᣲືࢆㄪᰝࡋࡓࠋ
䛆ᐇ㦂䛇 ZnO ୰ࡢ୙⣧≀Ỉ⣲ࡢᣲືࢆ᫂☜࡟ほ ࡍࡿࡓࡵࠊ኱㜰኱Ꮫࡢ Van de Graaff ຍ㏿ჾࢆ
⏝࠸࡚ 3.5 MeV ࡢ 1H+ࢆ ZnO ༢⤖ᬗ࡟↷ᑕࡋࡓ(↷ᑕ㔞: 2 u 1017/cm2)ࠋ↷ᑕᚋࠊ⣙ 400 kBq ࡢ
22Na ࢆ⥺※࡜ࡋ࡚⏝࠸ࠊfast-slow ྠ᫬ィᩘᅇ㊰࡟ࡼࡾヨᩱ୰࡛ࡢ㝧㟁Ꮚᑑ࿨ࢆ ᐃࡋࡓࠋᚓ
ࡽࢀࡓ㝧㟁Ꮚᑑ࿨ࢫ࣌ࢡࢺࣝࢆ▷ᑑ࿨ᡂศ࠾ࡼࡧ㛗ᑑ࿨ᡂศ࡟ศゎࡍࡿࡇ࡜࡟ࡼࡾࠊྛᡂศ
ࡢ㝧㟁Ꮚᑑ࿨࡜ᡂศᙉᗘࢆᚓࡓࠋᚓࡽࢀࡓࣃ࣓࣮ࣛࢱ࣮࠿ࡽ㝧㟁Ꮚࡢᾘ⁛ࢧ࢖ࢺࡢ✀㢮࡜๭ྜࢆ᥎ᐃࡋࡓࠋࡲࡓࠊ↷ᑕᚋࡢヨᩱ࡟ 1 ᫬㛫ࡢ➼᫬࢔ࢽ࣮ࣜࣥࢢࢆ⾜࠸ࠊࡑࡢᚋࡢ PALS
ᐃ࡟ࡼࡾ୙⣧≀Ỉ⣲࡜✵ᏍᆺḞ㝗ࡢ⇕ⓗᣲືࢆ㏣㊧ࡋࡓࠋ䛆⤖ᯝ䛸⪃ᐹ䛇㻌 ᅗ㸯࡟▷ᑑ࿨ᡂศ࠾ࡼࡧ㛗ᑑ࿨ᡂศࡢ㝧㟁Ꮚᑑ࿨࠾ࡼࡧᡂศᙉᗘࡢ࢔ࢽ࣮ࣜࣥࢢ ᗘ౫Ꮡᛶࢆ♧ࡍࠋ↷ᑕ๓ࡢ ZnO ༢⤖ᬗ୰࡟ࠊVZn
ࡢࡼ࠺࡞ᑠࡉ࠸✵Ꮝ࠿ࡽ 8 ಶ⛬ᗘࡢ༢୍✵Ꮝ࡛ᵓᡂࡉ
ࢀࡿ኱ࡁ࡞✵Ꮝࢡࣛࢫࢱ࣮ࡀᏑᅾࡋ࡚࠸ࡿࡇ࡜ࡀࢃ࠿
ࡗࡓࠋ1H+↷ᑕᚋࠊྛᡂศ࡜ࡶ࡟㝧㟁Ꮚᑑ࿨ࡀῶᑡࡋࡓ
ࡇ࡜࠿ࡽࠊ↷ᑕࡉࢀࡓỈ⣲ࡀ༢୍✵Ꮝࡸ✵Ꮝࢡࣛࢫࢱ
࣮࡟ᤕ⋓ࡉࢀࠊ」ྜయࡀᙧᡂࡉࢀࡓࡇ࡜ࡀ♧၀ࡉࢀࡓࠋ
ࡑࡢᚋࡢ➼᫬࢔ࢽ࣮ࣜࣥࢢ࡟ࡼࡾࠊ393-573 K ࡟࠾ࡅࡿ୧ᡂศࡢᑑ࿨ࡢቑຍࡀほ ࡉࢀࡓࠋࡇࢀࡣࠊ✵Ꮝ࡟ᤕ⋓ࡉࢀࡓ୙⣧≀Ỉ⣲ࡢẁ㝵ⓗ࡞⬺㞳㐣⛬ࢆ♧၀ࡋ࡚࠸ࡿ࡜⪃࠼ࡽࢀࡿࠋࡲࡓࠊ1H+ࡢ⬺㞳࡟ࡼࡾࠊ✵Ꮝయ✚ࡢᑠࡉ࠸ VZn ࡀ㟁Ⲵ⿵ൾࡢࡓࡵ࡟㝧㟁Ꮚࡢ྾ᘬࡀቑຍࡍ
ࡿࡓࡵࠊྠ ᗘ㡿ᇦࡢ▷ᑑ࿨ᡂศᙉᗘࡀቑຍࡋࡓ࡜⪃࠼ࡽࢀࡿࠋࡉࡽ࡟ࠊ773 K ࡲ࡛ࡢᑑ࿨ࡢ㢧ⴭ࡞ቑຍࡣࠊ
୙⣧≀Ỉ⣲ࡢ⬺㞳ࡢಁ㐍ࢆ♧၀ࡋ࡚࠸ࡿࠋ873 K ௨ୖࡢ ᗘኚ໬࡟ࡘ࠸࡚ࡣᮏⓎ⾲࡟࡚㆟ㄽࡍࡿࠋ[1] G. Brauer et al., Phys. Rev. B 79, 115212 (2009)
Thermal behavior of impurity hydrogen trapped in vacancy-type defects in single crystal ZnOSHIMIZU, H., SATO, W., MIHARA, M., FUJISAWA, T., FUKUDA, M., MATSUTA, K.

- 64 -

௡᨝ᰈᖵ ።  ጆῢ።ΰ
$‫ܙ‬$ῴ$ ౕ༄
%‫ܙ‬%ῴ% ౕ༄






3A01

ࢺࣜࢳ࣒࢘ᅇ཰ࡢࡓࡵࡢ㓟໬㖡ࡢ⾲㠃✚౫Ꮡᛶ(㟼኱㝔⥲ 1ࠊᐩᒣ኱Ỉ⣲◊ 2ࠊ㟼኱⌮Ꮫ㡿ᇦ 3) ○᳜ᮧ᭷ᕼ 1ࠊᱜ⏣⩧኱ 1ࠊ⸨⏣ၨᜨ 1ࠊᮾዋ௓ 1ࠊཎṇ᠇ 2ࠊἼከ㔝㞝἞ 2ࠊ⏣ཱྀ᫂ 2ࠊ㏆⏣ᣅᮍ 3ࠊ኱▮ᜤஂ 3㻌䛆⥴ゝ䛇 ᨺᑕ⥺᪋タ࡛ࡣỈ⣲ྠ఩యࡢࢺ࣮ࣞࢧ࣮࡜ࡋ࡚ࢺࣜࢳ࣒࢘ࡀ⏝࠸ࡽࢀࡿࡀࠊඖ⣲≧㸦Ẽయ㸧ࡢࢺࣜࢳ࣒࢘ࡣ HEPA ࣇ࢕ࣝࢱ࣮➼࡟ᤕ㞟ࡉࢀࡎࡑࡢࡲࡲ⎔ቃ୰࡟ᨺฟࡉࢀࡿࠋࢺࣜࢳ࣒࢘
฼⏝ࡢ♫఍ⓗཷᐜᛶࢆ㧗ࡵࡿࡓࡵ࡟ࡣࠊ⎔ቃ࡬ࡢᨺฟ๓࡟⡆᫆࠿ࡘຠ⋡ⓗ࡞ᅇ཰ࡀᚲせ࡛࠶ࡿࠋᮏ◊✲࡛ࡣࠊࢺࣜࢳ࣒࢘ᐇ㦂࡛⏝࠸ࡽࢀ┿✵ᐜჾ࠿ࡽ᤼Ẽࡉࢀࡓࢺࣜࢳ࣒࢘࢞ࢫ(HT)ࢆ
࢟ࣕࣜ࢔࢞ࢫࢆ㏻ࡌ࡚㓟໬㖡࡟ᑟධࡋࠊࢺࣜࢳ࣒࢘Ỉ࡜ࡋࠊỈࣂࣈ࣮࡛ࣛᅇ཰ࡍࡿࡇ࡜࡜ࡋࠊ
ࡑࡢ㝿ࡢຠ⋡ⓗᅇ཰᮲௳ࢆ᫂ࡽ࠿࡟ࡍࡿࡇ࡜ࢆ┠ⓗ࡜ࡋࡓࠋ䛆ᐇ㦂䛇 ᮏ◊✲࡛ࡣ㟼ᒸ኱Ꮫ⌮Ꮫ㒊ᨺᑕ⛉Ꮫᐇ㦂Ჷ࡟タ⨨ࡉࢀࡓࢺࣜࢳ࣒࢘࢖࢜ࣥ↷ᑕ⿦⨨࡟᤼Ẽࢺࣜࢳ࣒࢘࢞ࢫᅇ཰ࢩࢫࢸ࣒ࢆタ⨨ࡋࠊᐇ㦂ࢆ⾜ࡗࡓࠋᮏࢩࢫࢸ࣒࡛ࡣ㓟໬㖡࡟࡚ HT ࢆ㓟໬ࡋࡓࡢࡕ࡟Ỉࣂࣈ࣮ࣛࢆ⏝࠸ࠊࢺࣜࢳ࣒࢘ࢆᅇ཰ࡍࡿࠋ↷ᑕ⿦⨨࠿ࡽ᤼Ẽࡉࢀࡓ HT ࡣᅇ཰࢞ࢫ࡜࡜ࡶ࡟୍ࡘ┠ࡢ㓟໬ゐ፹⟶㸦300 – 700 K㸧ࢆ㏻ࡾࠊ㓟໬ࡉࢀࡓ HT ࡣ HTO ࡜ࡋ୍࡚ࡘ┠ࡢỈࣂࣈ࣮࡛ࣛᤕ㞟ࡋࡓࠋࡉࡽ࡟஧ࡘ┠ࡢ㓟໬ゐ፹⟶㸦973 K㸧࡟࡚Ⅳ໬Ỉ⣲ࢆྵࡴࡍ࡭
࡚ࡢࢺࣜࢳ࣒࢘ࢆ㓟໬ࡋࠊỈࣂࣈ࣮ࣛ࡟࡚ᤕ㞟ࡋࡓࠋᮏ◊✲࡛ࡣ୍ࡘ┠࡜஧ࡘ┠ࡢࣂࣈ࣮ࣛ
୰ࡢỈࡢᨺᑕ⬟ࢆᾮయࢩࣥࢳ࣮ࣞࢩࣙࣥ࢝࢘ࣥࢱ࡟࡚ ᐃࡋࠊᚓࡽࢀࡓࢺࣜࢳ࣒࢘⃰ᗘࡢẚࢆ㌿᥮⋡࡜ᐃ⩏ࡋࠊゐ፹⾲㠃✚ࢆࣃ࣓࣮ࣛࢱ࡜ࡋ㌿᥮⋡ࡢ㓟໬ゐ፹ ᗘࡸᅇ཰࢞ࢫὶ㏿࡟ཬࡰࡍᙳ㡪ࢆ᫂ࡽ࠿࡟ࡋࠊࢺࣜࢳ࣒࢘ᅇ཰ຠ⋡ࢆ᳨ウࡋࡓࠋ

ln k / s-1࠙⤖ᯝ࣭⪃ᐹࠚ
㓟໬㖡⢏ᚄࢆ 0.2 mm ࠾ࡼࡧ 1.0 mm ࡜ࡋࡓ᫬ࡢ㌿᥮⋡ࡢゐ፹ ᗘ౫Ꮡᛶࢆホ౯ࡋࡓ࡜ࡇࢁࠊ
ゐ፹ ᗘࡢୖ᪼ࠊ㓟໬㖡ࡢ⢏ᚄ⦰ᑠ࡟ࡼࡾ㌿᥮⋡ࡀቑຍࡍࡿࡇ࡜ࡀ♧ࡉࢀࡓࠋᅗ࡟ࠊ ᗘ࡜㓟໬཯ᛂ㏿ᗘࡢ࢔ࣞࢽ࣒࢘ࣉࣟࢵࢺࢆ♧ࡍࠋ473 K ௨ୖࡢ ᗘ㡿ᇦ࡛ࡣ㓟໬཯ᛂࡢᚊ㏿ẁ㝵ࡀ୍ࡘࡢ཯ᛂᶵᵓ࡟ᨭ㓄ࡉࢀ࡚࠾ࡾࠊྛ⢏ᚄࡢ㓟໬㖡౑⏝᫬ࡢ㓟໬཯ᛂ㏿ᗘࡣ k1 [s-1]= 5.4105
exp(-0.65 [eV] / kBT) : 1.0 mm, k2 [s-1]= 1.3106 exp(-0.64 [eV] / kBT) : 0.2 mm ࡛⾲ࡉࢀ㓟໬㖡⢏ᚄࡓࠋ㓟໬㖡⢏ᚄࡢ㐪࠸࡛άᛶ໬࢚ࢿࣝࢠ࣮
0.2 mm0
1.0 mmࡢኚ໬ࡣぢࡽࢀ࡞࠿ࡗࡓࡀ๓ᣦᩘᅉᏊࡣ
⣙ 2 ಸ࡜࡞ࡗࡓࠋࡲࡓᅇ཰࢞ࢫὶ㏿ቑຍ࡜࡜ࡶ࡟཯ᛂ㏿ᗘࡣቑຍࡋࡓࡀࠊ㓟໬㖡⢏ᚄ
-2
0.2 mm ᫬ࡢᅇ཰࢞ࢫὶ㏿ 50 sccm ௨ୖ࡟࠾࠸࡚㓟໬཯ᛂ㏿ᗘᐃᩘࡣ࡯ࡰ୍ᐃ࡜࡞
-4ࡗࡓࠋࡇࢀࡽࡢࡇ࡜࠿ࡽゎ㞳྾╔ࢧ࢖ࢺࡀ㓟໬㖡⢏ᚄ⦰ᑠ࡟క࠸ቑຍࡋࡓࡇ࡜࡟ࡼ
ࡿᙳ㡪ࡀ♧၀ࡉࢀࡓࠋᮏⓎ⾲࡛ࡣࡉࡽ࡟཯
2.0
2.5
3.0
ᛂ⟶㛗ࡉ౫Ꮡᛶ࡟ࡘ࠸࡚ࡢ᳨ウ⤖ᯝ࡟ࡘ
1000/T / K-1
࠸࡚ࡶ㆟ㄽࡍࡿࠋᅗ ྛ ᗘ࡟࠾ࡅࡿ㓟໬཯ᛂ㏿ᗘ
CuO surface area dependence for tritium recovery
Y. Uemura, S. Sakurada, H. Fujita, K. Azuma, M. Hara, Y. Hatano, A. Taguchi, T. Chikada, Y. Oya- 65 -



3A02⇞↝ἲ࡟ࡼࡿ᭷ᶵ⤖ྜᆺࢺࣜࢳ࣒࢘ࡢศᯒ࡟ࡘ࠸࡚
஑⎔༠  ‫ۑ‬ᓥ 㛗⩏ 㸪⋢฼ಇဢ 䛆⥴ゝ䛇 ⎔ቃ୰ࡢࢺࣜࢳ࣒࢘ࣔࢽࢱࣜࣥࢢ࡛ࡣ㸪㝣Ỉ㸪ᾏỈ㸪㝆Ỉ࡞࡝ࡢ࡯࠿㸪㨶㸪㎰⏘≀࡞࡝⏕≀ヨᩱ࡟ࡘ࠸࡚ࡶㄪᰝࡀ⾜ࢃࢀ࡚࠸ࡿࠋ⏕≀ヨᩱ୰ࢺࣜࢳ࣒࢘ࡢ࠺ࡕ㸪⤌⧊⤖ྜᆺࢺࣜࢳ࢘
࣒㸦OBT㸧ࡢศᯒ࡛ࡣ㸪ヨᩱࢆ⇞↝ࡉࡏ㸪Ⓨ⏕ࡍࡿ⇞↝Ỉࢆᾮయࢩࣥࢳ࣮ࣞࢩࣙࣥ࢝࢘ࣥࢱ࣮࡛ ᐃࢆ⾜࠺ᡭἲ㸯㸧ࡀ᥇ࡽࢀࡿࡇ࡜ࡀከ࠸ࠋ⎔ቃࣔࢽࢱࣜࣥࢢࢆ┠ⓗ࡜ࡋࡓ OBT ࡢ๓ฎ⌮ࡣ㸪ศᯒᚲせ㔞ࡀከࡃ㸪⇞↝⿦⨨ࡶ኱ᆺ࡛᧯సࡶ↹㞧࡛࠶ࡾศᯒᮇ㛫ࡶ㛗ᮇ໬ࡍࡿࠋ௒ᅇࡣ
ࢫࢡ࣮ࣜࢽࣥࢢࢆ┠ⓗ࡜ࡋࡓ OBT ศᯒࡢ㎿㏿໬࡟ࡘ࠸᳨࡚ウࢆ⾜ࡗࡓ⤖ᯝࢆሗ࿌ࡍࡿࠋ䛆ᐇ㦂䛇 ศᯒ ᐃࡢ㎿㏿໬࡟࠶ࡓࡗ࡚ࡣ┠ᶆ᳨ฟ⃰ᗘࡢタᐃࡀ㔜せ࡛࠶ࡿࠋࡇࢀࡀᚲせ౪ヨ㔞ࢆỴᐃࡋ㸪ฎ⌮ࢩࢫࢸ࣒ࡢつᶍ㸪๓ฎ⌮࣭ ᐃ᫬㛫ࢆᨭ㓄ࡍࡿࠋᮏヨ㦂࡛ࡣ㸪┠ᶆ᳨ฟ⃰ᗘࢆ 10
Bq/kg ࡜ࡋࡓࠋࡇࢀࡣ Codex ࡟♧ࡉࢀࡿ OBT ࡢ guideline level for infant food㸧㸰㸧ࡢ 100 ศࡢ
1 ࡛࠶ࡾ㸪ࢫࢡ࣮ࣜࢽࣥࢢ┠ⓗ࡜ࡋ࡚ࡣጇᙜ࡞┠ᶆ್࡜࠸࠼ࡿࠋ ヨᩱࡢ✀㢮ࡣ㨶㢮㸦ྍ㣗㒊㸧࡜ࡋࡓࠋ2g ࡢ㨶஝⇱ヨᩱࢆ㸪㓟໬㖡ࢆタ⨨ 㸦800Υ࡟ຍ⇕㸧ࡋࡓ▼ⱥ⟶୰࡛ࣄ࣮ࢱ࣮࡟ࡼࡾᚎࠎ࡟᪼ ࡋ㸪㓟⣲Ẽὶ୰࡛⇞↝ࡋࡓࠋ⇞↝Ỉࡣࢥ࣮ࣝࢻࢺ
ࣛࢵࣉ㸰ẁ㸦ịỈ+NaCl ෭༷㸪ཬࡧࢻࣛ࢖࢔࢖ࢫ+࢚ࢱࣀ࣮ࣝ෭༷㸧࡛ᅇ཰ࡋࡓࠋᅇ཰Ỉࢆ⵨␃ࡋ⢭〇ࡋࡓᚋ㸪20mL పᣑᩓ࣏࢚ࣜࢳࣞࣥࣂ࢖࢔ࣝ୰࡛ࢩࣥࢳ࣮ࣞࢱ㸦Ultima Gold uLLT㸧࡜ΰྜࡋ㸪పࣂࢵࢡࢢࣛ࢘ࣥࢻᾮయࢩࣥࢳ࣮ࣞࢩࣙࣥ࢝࢘ࣥࢱ࣮㸦Hitachi LSC LB7㸧࡟ࡼࡾ
100 ศ㛫 ᐃࡋࡓࠋࡲࡓ㸪ヨᩱࡢ⇞↝Ỉ㔞ࡢ⌮ㄽ್ࢆồࡵࡿࡓࡵ㸪ඖ⣲ศᯒ࡟ࡼࡾヨᩱࡢỈ⣲ྵ᭷⋡ࢆู㏵ ᐃࡋࡓࠋ䛆⤖ᯝ䛇 ᮏヨ㦂࡟࠾ࡅࡿ๓ฎ⌮㛤ጞࠥ ᐃ⏝ࢩࣥࢳ࣮ࣞࢩࣙࣥ࢝ࢡࢸࣝసᡂࡲ࡛ࡢᚲせ᫬㛫ࡣ 3 ᫬㛫⛬ᗘ࡛࠶ࡗࡓࠋࡲࡓ ᐃࡲ࡛ࡢ࢝ࢡࢸࣝ㟼⨨᫬㛫ࡣ㸪ᑠᐜ㔞 20mL ࡢ ᐃࣂ࢖࢔ࣝࢆ⏝࠸ࡿࡓࡵ㸪5 ᫬㛫⛬ᗘ࡜▷᫬㛫࡛Ⰻ࠸ࡇ࡜ࡀࢃ࠿ࡗࡓ㸦100mL ࡢ኱ᐜ㔞ࣂ࢖࢔ࣝࡢሙྜࡣᩘ᪥
㟼⨨ࡀᚲせ㸧
ࠋ᳨ฟୗ㝈್ࡣ㸪⇞↝Ỉ࠶ࡓࡾ࡛ 40 Bq/L㸪㨶ヨᩱ㔜㔞࠶ࡓࡾ࡛ 6 Bq/kg ⏕࡛࠶ࡾ㸪ࢫࢡ࣮ࣜࢽࣥࢢ࡜ࡋ࡚ᐇ⏝࡛ࣞ࣋ࣝ࠶ࡗࡓࠋ࡞࠾㸪ヨᩱࡢỈ⣲ྵ᭷⋡࠿ࡽィ⟬ࡉࢀࡿ⇞↝Ỉ㔞ࡢ⌮ㄽ್࡜ᐇ㦂࡟ࡼࡾᚓࡓ⇞↝Ỉ㔞ࡣⰋࡃ୍⮴ࡋ㸪⇞↝Ỉࡢᅇ཰࡟ၥ㢟ࡀ࡞࠸ࡇ࡜ࡀ
☜ㄆࡉࢀࡓࠋ

࠙ཧ⪃ᩥ⊩ࠚ
1㸧ᩥ㒊⛉Ꮫ┬ᨺᑕ⬟ ᐃἲࢩ࣮ࣜࢬ ࠕࢺࣜࢳ࣒࢘ศᯒἲࠖ㸪㸦2002㸧
2㸧CODEX STAN 193-1995
The analysis of organically bound tritium by combustion method
SHIMA, N., TAMARI, T.

- 66 -

3A03

᪂₲┴࡟࠾ࡅࡿ㛗༙ῶᮇᨺᑕᛶ᰾✀ศᕸㄪᰝ
㸦᪂₲┴ᨺᑕ⥺┘どࢭࣥࢱ࣮㸧ࠐ㕥ᮌ㈗༤ࠊ኱㔝ᓧྐࠊᒣ㷂⯆ᶞ࠙ㅖゝࠚ2011 ᖺ 3 ᭶࡟Ⓨ⏕ࡋࡓᮾி㟁ຊ(ᰴ)⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾ㸦௨ୗࠕ⚟ᓥཎⓎ஦ᨾࠖ࡜࠸࠺㸬
㸧ᙳ㡪ࡢᢕᥱཬࡧ⎔ቃヨᩱ୰ࡢ Pu ⃰ᗘࣞ࣋ࣝࡢᢕᥱ㸪Pu ࡜௚᰾✀࡜ࡢ┦㛵ཬࡧ㉳※ࡢ᥎ᐃࢆ┠ⓗ࡜ࡋ࡚㸪᪂₲┴ෆ࡟࠾࠸࡚᥇ྲྀࡋࡓ㝣ᅵ㸪ᾏᗏᅵཬࡧᾏὒᣦᶆ⏕≀୰ࡢ Pu ྠ఩య㸪137Cs ཬࡧ 90Sr ࢆศᯒࡋࡓ㸬࠙ヨᩱࠚ㝣ᅵࡣ 2011 ᖺ 10 ᭶㹼11 ᭶࡟࠿ࡅ࡚┴ෆ඲ᇦ࡛᥇ྲྀࡋࡓ 24 ヨᩱ㸪ᾏᗏᅵࡣ 2013 ᖺ
5 ᭶࡟┴ἢᓊ࡛᥇ྲྀࡋࡓ 19 ヨᩱ㸪ᾏὒᣦᶆ⏕≀ࡣ 2013 ᖺ 10 ᭶㹼2014 ᖺ 5 ᭶࡟࠿ࡅ࡚᯽
ᓮส⩚ཎⓎἈ࡛᥇ྲྀࡋࡓ࣍ࣥࢲ࣡ࣛ 12 ヨᩱࢆ㸪ࡑࢀࡒࢀ஝⇱㸦࣍ࣥࢲ࣡ࣛࡣ஝⇱ᚋ⅊໬㸧ࡋ㸪ศᯒ࡟౪ࡋࡓ㸬࠙ศᯒࠚ(1)Pu ྠ఩య㸸ᨺᑕ⬟ ᐃἲࢩ࣮ࣜࢬࠕࣉࣝࢺࢽ࣒࢘ศᯒἲࠖ࡟ᚑ࠸㸪ࢫࢸࣥࣞࢫᯈ࡟㟁╔ࡋࡓ Pu ࢆ Si ༙ᑟయ᳨ฟჾ࡟ࡼࡿȘ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺ࣮ࣜࢆ⾜ࡗࡓ㸬240Pu/239Pu ྠ఩యẚཬࡧș⥺ᨺฟ᰾✀࡛࠶ࡿ 241Pu ࡢศᯒࡣ㸪ヨᩱࢆ㓟ᢳฟ㸦ࡲࡓࡣ㟁╔ᯈࡢ Pu ࢆ HF ࢆ⏝࠸࡚๤㞳㸧ࡋ㸪࢖࢜ࣥ஺᥮࡟ࡼࡾ Pu ࢆ໬Ꮫศ㞳ᚋ㸪ᅄ㔜ᴟᆺ ICP-MS ࢆ⏝࠸࡚ ᐃࡋࡓ㸬(2)90Sr㸸ᨺᑕ⬟ ᐃἲࢩ࣮ࣜࢬࠕᨺᑕᛶࢫࢺࣟࣥࢳ࣒࢘ศᯒἲࠖ࡟ᚑ࠸㸪90Sr ࠿ࡽ⏕ᡂࡋࡓ 90Yࡢș⥺ࢆపࣂࢵࢡࢢࣛ࢘ࣥࢻ 2ȧ࢞ࢫࣇ࣮ࣟィᩘ⿦⨨࡟ࡼࡾ ᐃࡋࡓ㸬(3)134Cs ཬࡧ 137Cs㸸㝣ᅵཬࡧᾏᗏᅵࡣ㸪஝⇱ᅵ⣙ 50㹼100g ࢆ㸪࣍ࣥࢲ࣡ࣛࡣ⅊ヨᩱ⣙ 50g㸦⏕㔜㔞᥮⟬࡛ 1kg ┦ᙜ㸧ࢆ U-8 ᐜჾ࡟඘ሸࡋ㸪㧗⣧ᗘ Ge ༙ᑟయ᳨ฟჾ࡟ࡼࡿȚ⥺ࢫ࣌ࢡࢺࣟ
࣓ࢺ࣮ࣜࢆ⾜ࡗࡓ㸬ࡇࢀࡽࡢศᯒࡣ㸪ᨺᑕ⬟ ᐃἲࢩ࣮ࣜࢬࠕࢤ࣐ࣝࢽ࣒༙࢘ᑟయ᳨ฟჾ
࡟ࡼࡿ࣐࢞ࣥ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺ࣮ࣜࠖ࡟ᚑࡗࡓ㸬࠙⤖ᯝࠚ ᐃ⤖ᯝࡢᴫせࢆ Table 1 ࡟♧ࡍ㸬(1)᪂₲┴ෆࡢ㝣ᅵ㸪ᾏᗏᅵ㸪࣍ࣥࢲ࣡ࣛ㢮ࡢ 238Pu㸪239+240Pu ࡢ್ࡢ⠊ᅖࡣ㸪⚟ᓥཎⓎ஦ᨾ๓ࡢᅜෆࡢ㝣ᅵ㸪᪥ᮏᾏࡢᾏᗏᅵ㸪࣍ࣥࢲ࣡ࣛ࠿ࡽ᳨ฟࡉࢀࡓ್ࡢ⠊ᅖෆ࡛࠶ࡗࡓ㸬(2) 238Pu/239+240Pu ᨺᑕ⬟ẚ㸪240Pu/239Pu㸪240Pu/239Pu ཎᏊᩘẚࡼࡾ㸪㝣ᅵ࠿ࡽ᳨ฟࡉࢀࡓ 238Pu
ཬࡧ 239+240Pu ࡣ㐣ཤࡢ᰾ᐇ㦂࡟⏤᮶ࡍࡿࡶࡢ࡜⪃࠼ࡽࢀࡓ㸬ᾏᗏᅵ࡜࣍ࣥࢲ࣡ࣛࡣ㸪㐣ཤࡢኴᖹὒୖ᰾ᐇ㦂࡟ࡼࡿᾏὒởᰁࡢᙳ㡪ࢆཷࡅ࡚࠸ࡿ࡜⪃࠼ࡽࢀࡓ㸬(3) ᅵተཬࡧᾏᗏᅵ࡟ࡘ࠸࡚ࡣ㸪137Cs ࡢ⃰ᗘࡀ⚟ᓥཎⓎ஦ᨾ๓ࡢ ᐃ್ࡢ⠊ᅖࢆ㉸࠼ࡓᆅⅬࡀ࠶ࡗࡓ㸬ࡲࡓ㸪134Cs ࡀ᳨ฟࡉࢀ࡚࠸ࡿࡇ࡜࠿ࡽ㸪⚟ᓥཎⓎ஦ᨾࡢᙳ㡪ࡀ⪃࠼ࡽࢀࡓ㸬(4) 90Sr ࡣ⚟ᓥཎⓎ஦ᨾ๓ࡢ್ࡢ⠊ᅖෆ࡛㸪⚟ᓥཎⓎ஦ᨾࡢᙳ㡪ࡣ࡯࡜ࢇ࡝ぢࡽࢀ࡞࠿ࡗࡓ㸬
Table 1. Analytical result for Pu isotopes, 90Sr, 134Cs and 137Cs concentration and ratio of Pu isotopes
in environmental samples
Samples

Concentration units

Soil

Bq/kg-dry

Sea Sediment

Bq/kg-dry

Sargassum seaweeds

Bq/kg-raw

90

Pu isotope
238

Pu

ND 㹼
0.098
ND 㹼
0.022
ND
㹼
0.08710-3

239+240

238

Pu

ND 㹼
3.9
0.10 㹼
1.6
2.9610-3㹼
8.8510-3

Pu/239+240Pu
activity ratio

240
Pu/239Pu
atomic ratio

0.017 㹼0.033
0.010 㹼
0.034
0.011
㹼
0.015

0.155 㹼0.195
0.202 㹼
0.243
0.199
㹼
0.254

90

Sr,134Cs,137Cs

Sr

ND 㹼
3.2
ND 㹼
0.37
0.031
㹼
0.064

Distribution of long-lived artificial radionuclides in environment of Niigata Prefecture
Suzuki T., Ono T., Yamazaki K.

- 67 -

134

Cs

137

Cs

ND 㹼
140
ND 㹼
43

ND 㹼
230
ND 㹼
93

ND

ND

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ࢺ࣒ࣜ࢘ࡢᅵተ᳜̾≀㛫⛣⾜ಀᩘࡢၥ㢟Ⅼ㸸ศᯒ᪉ἲ࡟ࡼࡿ㐪࠸㔞Ꮚᶵᵓᨺ་◊ ࠊᮾிࢽ࣮ࣗࢡࣜ࢔  ‫ୖ⏣ۑ‬ᜨᏊ ࠊෆ⏣⁠ኵ ࠊ⏣㒊஭೺ 䛆⥴ゝ䛇 ᅵተѸ᳜≀㛫⛣⾜ಀᩘ㸦7)㸧࡟ࡘ࠸࡚ࠊ,$($ ࡣ 7HFKQLFDO5HSRUW6HULHV1R ࡟࠾࠸࡚ึࡵ࡚Ẽೃู࡟ྲྀࡾࡲ࡜ࡵࡓࠋ7K ࡟ࡘ࠸࡚ࡣࠊ᰿⳯㢮➼ࡢ 7) ࡣ ᬮᖏࡢ᪉ࡀ㧗࠿ࡗࡓ୍᪉࡛ࠊⴥ⳯㢮ࢆྵࡴⴥస≀࡛ࡣࠊ⇕ᖏࡢ᪉ࡀ ᬮᖏࡼࡾࡶ  ᱆್ࡀ㧗ࡃࠊẼೃࡢᙳ㡪ࡀ⪃࠼ࡽࢀࡓࠋࡑࡇ࡛ᡃࠎࡣ 756 ࡛᥇⏝ࡉࢀࡓ௨㝆ࡢࢹ࣮ࢱࢆࡉࡽ࡟཰㞟ࡋ࡚ሗ࿌ࡋࡓ㸦:DQJ
et al-5DGLRDQDO1XFO&KHP㸧ࠋࡑࡢ୰࡛ 7K ࡢ 7) ࢆศᯒ᪉ἲ࡟ࡼࡗ࡚ศ㢮ࡋࡓ࡜ࡇࢁࠊȚ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺ࣮ࣜ࡟ࡼࡿ 7) ್ࡣ᫂ࡽ࠿࡟ ,&3̾06 ࡼࡾࡶ㧗࠸࡜࠸࠺⤖ᯝࢆᚓࡓࠋȚ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺ࣮࡛ࣜࡣ 7K ࡑࡢࡶࡢ࡛ࡣ࡞ࡃᏊᏞ᰾✀ࢆ ᐃࡋ࡚࠸ࡿࡇ࡜ࡀせᅉ࡜⪃࠼ࡽࢀࡓࡀࠊヲ⣽࡟᳨ウࡍࡿᚲせࡀ࠶ࡿࠋᮏ◊✲࡛ࡣࠊ7K ࡢ 7) ࡀȚ⥺ࢫ࣌ࢡࢺ࣓ࣟ
ࢺ࣮࡛ࣜṇࡋࡃィ ࡛ࡁࡿࡢ࠿࡝࠺࠿࡟ࡘ࠸࡚ࠊ᳨ウࢆ⾜ࡗࡓࠋ䛆ᮦᩱ䛚䜘䜃᪉ἲ䛇 ࡲࡎ᭱᪂ࡢᩥ⊩ࢹ࣮ࢱࢆ཰㞟࣭ᩚ⌮ࡋࠊ7) ࡢẚ㍑ࢆ⾜ࡗࡓࠋࡲࡓࠊ⋞⡿㸳ヨᩱ࡜ࡑࢀࡽࡢヨᩱࡀ᥇ྲྀࡉࢀࡓ㎰⪔ᆅᅵተヨᩱࢆ⏝࠸ࠊ,&3Ѹ06 ࡜ *H ༙ᑟయ᳨ฟ⿦⨨࡟ࡼࡿᐃ㔞ࢆ⾜ࡗࡓࠋ,&3Ѹ06 ᐃ࡟ࡣࠊ⢊○ࡋࡓ஝⇱ヨᩱ㸦ᅵተ㸸PJ ⋞⡿㸸PJ㸧࡟㉸㧗⣧ᗘ㓟㸦+)+12㸧ࢆῧຍࡋࠊ࣐࢖ࢡ࢙࣮ࣟ࢘ࣈศゎ⿦⨨ࢆ⏝࠸࡚඲ศゎࡋࡓࠋ⁐ᾮ໬ࡋࡓヨᩱࢆ⵨Ⓨ࣭஝ᅛࡋࠊ᭱⤊ⓗ࡟ࡣ ◪㓟⁐ᾮ࡟ㄪᩚࡋࡓࠋȚ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺ࣮ࣜ⏝࡟ࡣࠊ㢼஝ᅵተ࠾ࡼࡧ  ᗘ࡛⅊໬ࡋࡓ⋞⡿ヨᩱࢆ⏝࠸ࠊࡇࢀࡽࢆ P/ ᐜჾ࡟  P/ ศྲྀࡋ࡚ᐦ㛢ࡋࠊ㸱ࣨ᭶௨ୖ⤒㐣ࡋ࡚࠿ࡽィ ࢆ⾜ࡗࡓ㸦ྛ  ⛊㸧ࠋ⋞⡿ヨᩱ᥇ྲྀ࠿ࡽ ᐃࡲ࡛ࡣ⣙  ᖺ⤒㐣ࡋ࡚࠸ࡓࠋ
䛆⤖ᯝ䛚䜘䜃⪃ᐹ䛇 ᅗ㸯࡟ᩥ⊩ㄪᰝࡢ⤖ᯝࡢ୍㒊ࢆ♧ࡍࠋᩥ⊩ࡣ - 5DGLRDQDO 1XFO &KHPࠊ
5DGLDW 3URWࠊ- (QY 5DGLRDFWLY➼࡟  ࡟ᥖ㍕ࡉࢀࡓࡶࡢ࡛࠶ࡿࠋ*H ༙ᑟయ᳨ฟ⿦⨨ࡢሙྜࠊ7K ࠿ࡽ 5D㸦༙ῶᮇ㸸\㸧ࢆ⤒࡚ $F㸦༙ῶᮇ㸸K㸧࡟࡞ࡿࡇ࡜ࢆ
฼⏝ࡋ࡚ࠊ$F ࡸࡑࡢᏊᏞ᰾✀ࢆ⏝࠸࡚ 7K ࢆᐃ㔞ࡍࡿࡇ࡜ࡀከ࠸ࠋᅵተࡣ 7K ⣔ิ᰾✀ࡀ࡯ࡰᨺᑕᖹ⾮࡟㐩ࡋ࡚࠸ࡿࡓࡵࠊࡇࡢ᪉ἲ࡛ 7K ࢆᐃ㔞࡛ࡁࡿࠋࡋ࠿ࡋ᳜≀ヨᩱࡢሙ
ྜࠊ7K ࡟ẚ࡭࡚ 5D ࡀ᳜≀࡟྾཰ࡉࢀࡸࡍ࠸ࡇ࡜࡟ὀពࡋ࡞ࡅࢀࡤࠊ㐺ษ࡞ᐃ㔞ࢆ⾜࠺ࡇ࡜ࡀ࡛ࡁ࡞࠸㸦8FKLGDDQG7DJDPL-1XFO6FL7HFKQRO㸧ࠋࡍ࡞ࢃࡕࠊ*H ༙ᑟయ᳨ฟ⿦⨨࡛ᚓࡽࢀࡓ 7K ࡢ 7) ࡣࠊᐇ㝿࡟ࡣ
5D ࢆホ౯ࡋ࡚࠸ࡿྍ⬟ᛶࡀ㧗࠸ࠋ)UXLWYHJHWDEOHV /HDI\YHJHWDEOHV
7XEHUV ⋞⡿ヨᩱࢆ⏝࠸࡚ Th ࡢᐃ㔞ࢆ⾜ࡗࡓ࡜ࡇࡾホ౯ࡋࡓ TF ್ࡣࠊICP̾MS ࡼࡾࡶ㸯᱆㧗࠿ࡗࡓࠋᡃࠎࡣࡉࡽ࡟ Th ࡸ Ra ࡢ᳜≀྾཰⛬ᗘࡢ㐪࠸ࢆ⪃៖ࡋࡓ⃰ᗘࡢ⤒᫬ኚ໬࡟ࡘ
࠸࡚ࣔࢹࣝィ⟬ࢆヨࡳࠊᐇ

7UDQVIHUIDFWRUࢁࠊȚ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺ࣮࡛ࣜ Ac-228 ࡟ࡼ







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

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

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್࡜Ⰻ࠸୍⮴ࡀᚓࡽࢀࡓࠋヲ⣽ࡣㅮ₇᫬࡟㏙࡭ࡿࠋ ᮏ◊✲ࡢ୍㒊ࡣ㸪㈨※࢚ࢿࣝࢠ࣮ᗇᨺᑕ

ᛶᗫᲠ≀ඹ㏻ᢏ⾡㛤Ⓨㄪᰝ➼ጤク㈝ࡢண
⟬࡛⾜ࢃࢀࡓࠋ

*H

,&306

*H

,&306

*H

,&306

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ᅗ㸯 㸱✀㢮ࡢస≀࡬ࡢ Th ࡢ⛣⾜ಀᩘࡢศᯒ
ἲ࡟ࡼࡿẚ㍑㸦ᩥ⊩್㸧

7KRULXPVRLOWRSODQWWUDQVIHUIDFWRULVVXHVHIIHFWRIPHDVXUHPHQWPHWKRGV
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- 68 -

3A05

 ICP-MS/MS ࡟ࡼࡿᾏỈ୰Np-237
1

2

ᐃࡢヨࡳ
3

(⟃Ἴ኱ᩘ⌮ ࠊᗈᓥ኱㝔⌮ ࠊᏛ⩦㝔኱⌮ ࠊAgilent4ࠊ(㈈) ⎔ቃ◊5)‫ۑ‬ᆏཱྀ⥤1ࠊEigl Rosmarie2ࠊᮏከ┿⣖1ࠊ኱㔝๛3ࠊゅ⏣⤀୍㑻3ࠊ㮵⡲ᗣ⾜4ࠊ㧗ஂ㞝୍5ࠊᒣ㷂ಙဢ1ࠊᮎᮌၨ௓1࠙⥴ゝࠚ  㛗༙ῶᮇேᕤᨺᑕᛶ᰾✀ 237Np(༙ῶᮇ 2.144×106 ᖺ)ࡣࠊᾏỈ୰࡟Ⅳ㓟㘒యNpO2CO3-࡜ࡋ࡚Ᏻᐃ࡟⁐Ꮡࡋࠊࢧࣥࢦ➼ࡢศᯒ࠿ࡽࠊ⾲ᒙᾏỈ࡬ࡢᑟධᖺ௦࠾ࡼࡧᑟධ㔞᚟ඖࡀྍ⬟࡛࠶ࡿࡓࡵࠊᾏỈᚠ⎔ࢆ㏣࠺ࢺ࣮ࣞࢧ࣮࡜ࡋ࡚฼⏝ྍ⬟࡛࠶ࡿ࡜ண᝿ࡉࢀࡿࠋ≉࡟㏆ᖺὀ┠ࡉࢀ࡚࠸ࡿᾏỈ୰ࡢ 236U ࡜ࡢẚࡀࡑࡢⓎ⏕※࡟ࡼࡾ␗࡞ࡿࡓࡵࠊࡇࢀࡽ᰾✀ࢆేࡏ࡚⏝࠸ࡿࡇ࡜࡛Ỉሢ㉳※ࡶ≉ᐃ࡛ࡁࡿ᭷⏝࡞ࢺ࣮ࣞࢧ࣮࡜࡞ࡾ࠺ࡿࠋࡋ࠿ࡋࠊᾏỈ୰ࡢ 237Np
ࡣࠊ1,800 L ࡢヨᩱ࠿ࡽ↹㞧࡞໬Ꮫศ㞳ἲ࡟ࡼࡾ⃰⦰࣭ศ㞳⏕ᡂࡋࠊD⥺ࢫ࣌ࢡࢺ࣓ࣟࢺ࣮ࣜ
࡛ 10 ᪥࠿ࡅ࡚ ᐃࡍࡿ࡜࠸࠺᪉ἲࡀ 1980 ᖺ௦࡟ヨࡳࡽࢀࡓࡢࡳ࡛࠶ࡾࠊᾏỈᚠ⎔ࢺ࣮ࣞࢧ࣮࡜ࡋ࡚⏝࠸ࡿࡇ࡜ࡣ⌧ᐇⓗ࡛ࡣ࡞࠿ࡗࡓࠋ237Np ࢆᾏὒࢺ࣮ࣞࢧ࣮࡜ࡋ࡚☜❧ࡍࡿࡇ࡜ࢆ᭱
⤊┠ⓗ࡜ࡋࠊᮏ◊✲࡛ࡣ ICP-MS/MS 䛾ឤᗘྥୖ࣭᮲௳᭱㐺໬࡜⡆౽࡞໬Ꮫศ㞳ἲ☜❧࡟ࡼࡾࠊᩘࣜࢵࢺࣝࡢᾏỈ୰ࡢ 237Np ࡢ ᐃࢆヨࡳࡓࠋ࠙ᐇ㦂ࠚ ⎔ቃヨᩱࡢࡼ࠺࡞ࠊ㧗࣐ࢺࣜࢡࢫ⁐ᾮ୰࡟Ꮡᅾࡍࡿඖ⣲ࡢ ᐃ࡟㐺ࡋࡓ ICP-MS/MSࡢタᐃ࡛ࡣࠊ㧗㉁㔞ඖ⣲ࡢឤᗘࡣ⣙ 0.1 Gcps/1 ppm ࡛࠶ࡾࠊண᝿ࡉࢀࡿ 237Np ⃰ᗘ࠾ࡼࡧ౑⏝ᾏỈ㔞࠿ࡽィ⟬ࡍࡿ࡜ 10 ಸ௨ୖࡢឤᗘྥୖࡀᚲせ࡜࡞ࡿࠋ㧗㉁㔞ඖ⣲ࡢឤᗘࢆྥୖࡉࡏࡿࡓ
ࡵࠊձࣉࣛࢬ࣐࡬ࡢヨᩱᑟධຠ⋡࡜ࣉࣛࢬ࣐୰࡛ࡢ࢖࢜ࣥ໬⋡ࠊղศᯒ㒊࡬ࡢ࢖࢜ࣥ㏱㐣⋡࡟ࡘ࠸᳨࡚ウࡋࡓࠋձ࡟ࡘ࠸࡚ࡣࠊ⬺⁐፹⿦⨨(APEX-HF, ESI)࡟ࡼࡾヨᩱ⁐ᾮࢆẼ໬ࡉࡏࠊࢻࣛ࢖࢚࢔ࣟࢰࣝ࡜ࡋ࡚ ICP ࡟ᑟධࡋࠊ࠿ࡘ❅⣲࢞ࢫࡢΰྜ࡟ࡼࡿឤᗘྥୖࢆ᳨ウࡋࡓࠋղ࡟ࡘ࠸࡚ࡣ࢖ࣥࢱ࣮ࣇ࢙࣮ࢫᕪື᤼Ẽ㒊ศࡢ┿✵ᗘࠊࢫ࣐࣮࢟ࢥ࣮ࣥ࡟ࡼࡿ࢖࢜ࣥࢫ࣑࢟ࣥ
ࢢ఩⨨ࠊࡑࡋ࡚ࢫ࣐࣮࢟ࢥ࣮ࣥࡢᙧ≧࠾ࡼࡧ࢜ࣜࣇ࢕ࢫᚄࢆኚ໬ࡉࡏ࡚ࠊࡑࢀࡒࢀࡢࣃ࣓ࣛ
࣮ࢱኚ໬᫬ࡢ࢝࢘ࣥࢺኚ໬࠿ࡽ ᐃ᮲௳ࢆ᭱㐺໬ࡋࡓࠋࡲࡓࠊᾏỈ୰ Np ࡢᐃ㔞ⓗ࠿ࡘᐜ᫆࡞
ᅇ཰࣭⃰⦰᧯సἲࢆ☜❧ࡍࡿࡓࡵ࡟ࠊỈ㓟໬㕲࡛ඹỿࡉࡏࡓヨᩱࢆ 10 M ሷ㓟⁐ᾮ࡟ㄪᩚࡋࠊ
ࢪ࢖ࢯࣉࣟࣆ࢚࣮ࣝࢸࣝᢳฟ࡛㕲ࢆ㝖ཤࡋࡓᚋ࡟ 1-2 ml ࡟࡞ࡿࡲ࡛ຍ⇕⃰⦰ࢆ⾜ࡗࡓヨᩱ୰ࡢ Np ᅇ཰⋡ࢆヨ⟬ࡋࡓࠋ࠙⤖ᯝ࣭⪃ᐹࠚ ㉁㔞ᩘ 90 ⛬ᗘࡢ᰾✀࡟ࡘ࠸࡚ࠊ⬺⁐፹⿦⨨ࢆ⏝࠸ࡓࢻࣛ࢖࢚࢔ࣟࢰࣝヨᩱࡢᑟධ࡟ࡼࡾ⣙ 10 ಸࠊ❅⣲࢞ࢫΰྜ࡟ࡼࡾࡉࡽ࡟⣙ 2 ಸࡢឤᗘྥୖࡀぢࡽࢀࡓࡀࠊ┠ⓗ࡜ࡍ
ࡿ㉁㔞ᩘ 200 ௨ୖࡢ᰾✀࡟ࡘ࠸࡚ࡣࠊేࡏ࡚⣙ 7 ಸࡢឤᗘୖ᪼࡟࡜࡝ࡲࡗࡓࠋࢫ࣐࣮࢟ࢥ࣮
ࣥ࠾ࡼࡧࣞࣥࢬᙧ≧ࡢኚ᭦࡟ࡼࡾ㉁㔞ᩘ 200 ௨ୖࡢ᰾✀࡛ࡣࡉࡽ࡟⣙ 5 ಸࡢឤᗘྥୖࡀぢࡽࢀࡓࠋ࢖ࣥࢱ࣮ࣇ࢙࣮ࢫ㒊ࡢᅽຊࢆ⣙༙ศ࡟ࡋࡓሙྜ࡟㉁㔞ᩘ 90 ⛬ᗘࡢ᰾✀ࡣ 1.3-1.5 ಸࡢឤᗘୖ࡛᪼࠶ࡗࡓ୍᪉ࠊ㉁㔞ᩘ 200 ௨ୖࡢ᰾✀࡛㢧ⴭ࡞ᨵၿࡣぢࡽࢀ࡞࠿ࡗࡓࠋࡲࡓࠊࢫ࢟
࣐࣮ࢥ࣮ࣥࡢࢫ࣑࢟ࣥࢢ఩⨨ࢆኚ໬ࡉࡏ࡚ࡶឤᗘྥୖࡣㄆࡵࡽࢀ࡞࠿ࡗࡓࠋ⤖ᯝ࡜ࡋ࡚ࠊ┠ⓗ࡜ࡍࡿ㉁㔞ᩘ 200 ௨ୖࡢ᰾✀࡛ࡣࠊ㏻ᖖࡢ⎔ቃヨᩱ

ᐃ᫬࡜ẚ㍑ࡋ࡚⣙ 30-40 ಸࡢឤᗘྥ

ୖࡀ㐩ᡂࡉࢀࡓࠋ
ᾏỈヨᩱࡢ໬Ꮫศ㞳࡟࠾ࡅࡿ᭱⤊ⓗ࡞ Np ᅇ཰⋡ࡣ⣙ 50%࡛࠶ࡗࡓࠋࡇࢀࡣࠊᐃ㔞ⓗ࡟ Np(V)ࡀඹỿࡋ࡚࠸࡞࠸ࡇ࡜ࡀண᝿ࡉࢀࠊ௒ᚋࠊNp(IV)࡬ࡢ㑏ඖᚋ࡟ඹỿ᧯సࢆ⾜࠺ࡇ࡜࡛ࡑࡢᅇ
཰⋡ࢆྥୖࡉࡏࡿணᐃ࡛࠶ࡿࠋ
Determination of ultra-low levels of Np-237 in seawater by ICP-0606
SAKAGUCHI, A., EIGL, R, HONDA, M., OHNO, T., KAKUTA, S., SHIKAMORI, Y., TAKAKU,
Y., YAMASAKI, S., 68(.,K.

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3A06

ࢫࢺࣟࣥࢳ࣒࢘ ศᯒ⏝⮬ື໬ࢩࢫࢸ࣒ࡢ⎔ቃヨᩱศᯒ࡬ࡢ㐺⏝ ཎᏊຊᶵᵓ  ࠊ.(.  ࠊ㛵ᮾᢏ◊  ‫⏣⸨ۑ‬༤႐  ࠊ㔝ᓥ೺኱  ࠊỌᒸ⨾ె  ࠊ኱⃝ᓫே  ࠊᑠ㔝ὒఙ  䛆⥴ゝ䛇ᮾ㟁ཎⓎ஦ᨾ࡟ࡼࡾ⎔ቃ୰࡟ᨺฟࡉࢀࡓᨺᑕᛶ≀㉁ࡢ࠺ࡕ ࠊᨺᑕᛶࢫࢺࣟࣥࢳ
࣒࢘㸦 90 Sr㸧࡟ࡘ࠸࡚ࡣ໬Ꮫศ㞳᧯సࡀᚲせ࡛࠶ࡾࠊࡑࡢศᯒ࡟ࡣ㛗᫬㛫ࢆせࡍࡿࡇ࡜࠿ࡽࠊศᯒ⤖ᯝࡣᑡ࡞࠸ࠋࡇࡢࡓࡵࠊᖹᡂ 25 ᖺ 1 ᭶࠿ࡽᖹᡂ 27 ᖺ 3 ᭶ࡲ࡛ࡢᮇ㛫࡟࠾࠸࡚ࠊ᚟⯆ಁ㐍ࣉࣟࢢ࣒ࣛ㸦࣐ࢵࢳࣥࢢಁ㐍㸧࡜ࡋ࡚ࠊࠕ⎔ቃヨᩱ୰ࢫࢺࣟࣥࢳ࣒࢘
90-90 ศᯒ⏝⮬ື໬ࢩࢫࢸ࣒ࡢ㛤Ⓨࠖ࡟ྲྀࡾ⤌ࡳࠊ Sr ศᯒᕤ⛬ࡢ࠺ࡕࠊ⅊ヨᩱ㸦㎰␆⏘≀ཬࡧᾏ⏘≀㸧ࢆᑐ㇟࡜ࡋ࡚ࢫࢺࣟࣥࢳ࣒࢘ࢆ༢㞳ࡍࡿࡲ࡛ࡢᕤ⛬ࢆ⮬ື໬ ࡛ࡁࡓࠋࡇࡢ⤖ᯝ࡟ࡘ࠸࡚ࡣࠊ๓ᅇࡢᨺᑕ໬Ꮫウㄽ఍࡟࠾࠸࡚Ⓨ⾲ࡋࡓࠋࡉࡽ࡟ࠊୖグ◊✲ᮇ㛫௨㝆ࡶᮏࢩࢫࢸ࣒ࡢ㧗ᗘ໬ࢆ⥅⥆ࡋ࡚࠾ࡾࠊ࠸ࡃࡘ࠿ࡢᨵⰋ
ࢆ⾜࠸ࠊᛶ⬟ࢆྥୖࡉࡏࡿࡇ࡜ࡀ࡛ࡁࡓࠋ⌧ᅾࡢ⮬ື໬ࢩࢫࢸ࣒ࡢᴫせࢆሗ࿌ࡍࡿ࡜
࡜ࡶ࡟ࠊᐇ㝿ࡢ⅊ヨᩱศᯒࢆ⾜࠸ࠊసᴗ⪅࡟ࡼࡿศᯒ࣭ ᐃ⤖ᯝ࡜ ࡢẚ㍑⤖ᯝ࡟ࡘ࠸࡚ࡶሗ࿌ࡍࡿࠋ
䛆᪉ἲ䛇  6U ศᯒᕤ⛬ࡢ࠺ࡕࠊ‵ᘧ⅊໬ᕤ⛬࡟࠾࠸࡚ࠊຍ⇕୰࡟࠾ࡅࡿ✺Ἓࢆ㜵Ṇࡍࡿࡓࡵࡢᅽ⦰✵Ẽࡢ྿ࡁ௜ࡅᶵ⬟ࢆ㏣ຍࡋࡓࠋࡲࡓࠊຍ⇕ࣉࣟࢢ࣒ࣛ࡟ࡘ࠸࡚ࡶ ࠊ୍ᐃ㏿ᗘ࡛ࡢ᪼ ࠿ࡽ Υཬࡧ Υ࡛ࡑࢀࡒࢀ ᗘࢆಖᣢࡋ࡚ศゎࡋࠊ᭱⤊ⓗ࡟ Υࡲ࡛᪼ ࡉࡏࡿࡼ࠺࡟ᨵⰋࡋࡓࠋ
ḟ࡟ࠊ໬Ꮫศ㞳ᕤ⛬࡟࠾࠸࡚ࠊヨ⸆ᢞධᚋࡢヨᩱ⁐ᾮࡢᨩᢾ᧯సࢆࠊྍᦙᆺᆶ┤ከ㛵⠇ࣟ࣎ࢵࢺ࡟ࡼࡿᨩᢾ࠿ࡽࢫࢱ࣮࣮ࣛ࡟ࡼࡿᨩᢾ࡟ษࡾ᭰࠼ࡓࠋ ᭱ᚋ࡟ࠊ࢖࢜ࣥ஺᥮ᕤ⛬࡟࠾࠸࡚ࠊ࢖࢜ࣥ஺᥮࣒࢝ࣛෆࡢヨᩱ⁐ᾮ㔞ࡢ┘どࢆ࣓࢝ࣛ࡟ࡼࡿ⏬ീㄆ㆑࡛⾜ࡗ࡚࠸ࡓࡀࠊ࣮ࣞࢨගࢆ฼⏝ࡋࡓ┘ど᪉ἲ࡟ษࡾ᭰࠼ࡓࠋ
ୖグࡢᨵⰋࢆ⾜ࡗࡓᚋࠊ⅊໬ࡋࡓᾏ⸴ࢆヨᩱ࡜ࡋࠊᮏࢩࢫࢸ࣒࡛ศᯒࢆ⾜࠸ࠊヨᩱ୰  6U ⃰ᗘࢆồࡵࡓࠋࡇࡇ࡛ᚓࡽࢀࡓ⤖ᯝ࡜సᴗ⪅࡟ࡼࡿศᯒ⤖ᯝ࡜ẚ㍑ࡋࡓࠋ
䛆⤖ᯝ䛇‵ᘧศゎᕤ⛬࡟࠾࠸࡚ࠊຍ⇕ࡋ࡞ࡀࡽヨᩱ⁐ᾮ࡟ᅽ⦰✵Ẽࢆ྿ࡁ௜ࡅࡿࡇ࡜࡛ࠊ
సᴗ⪅ࡢᨩᢾ࡜ྠᵝࡢຠᯝࡀᚓࡽࢀࠊ✺Ἓࢆ᏶඲࡟㜵Ṇࡍࡿࡇ࡜ࡀ࡛ࡁࡓࠋࡲࡓࠊࡇ
ࢀ࡟ࡼࡾࠊ⏬ീゎᯒ࡟ࡼࡿࣅ࣮࣮࢝ෆࡢヨᩱ⁐ᾮࡢ᭷↓ࡢุ᩿ࡀᐜ᫆࡜࡞ࡗࡓ ࠋ໬Ꮫศ㞳ᕤ⛬࡟࠾࠸࡚ࠊࢫࢱ࣮࣮ࣛ࡟ࡼࡿᨩᢾ᧯సࢆᑟධࡍࡿࡇ࡜ ࡛ࠊヨ⸆ᢞධ᫬ࡢ⁐ゎཬࡧ S+ ㄪᩚࡢ᫬㛫ࢆ▷⦰࡛ࡁࡓࠋ
࢖࢜ࣥ஺᥮ᕤ⛬࡟࠾࠸࡚ࠊ࢖࢜ࣥ஺᥮࣒࢝ࣛ ෆࡢ⁐ᾮࡢ᭷↓ཬࡧヨ⸆ᢞධ᫬ࡢ‶Ỉࡢ᳨▱ࢆ࣮ࣞࢨගࡢ᳨▱ἲ࡟ษࡾ᭰࠼ࡓࡇ࡜࡛ࠊ⮬ື࡛ࡢ࢖࢜ࣥ஺᥮ࡀ☜ᐇ࡟⾜࠼ࡿࡼ࠺࡟࡞ࡗࡓࠋ
⅊໬ࡋࡓᾏ⸴୰  6U ࢆᮏࢩࢫࢸ࣒࡛ศᯒࡋࠊ 6U ⃰ᗘࢆ ᐃࡋࡓ⤖ᯝࠊィᩘㄗᕪࡢ ಸࡢ⠊ᅖෆ࡛సᴗ⪅ࡢศᯒ⤖ᯝ࡜୍⮴ࡋࠊᮏࢩࢫࢸ࣒࡛ヨᩱ୰  6U ศᯒࡀྍ⬟࡛࠶ࡿࡇ࡜ࡀศ࠿ࡗࡓࠋ
ᮏ㛤Ⓨࡣࠊࠕ᚟⯆ಁ㐍ࣉࣟࢢ࣒ࣛ㸦࣐ࢵࢳࣥࢢಁ㐍㸧㸦-67 ᚟⯆ಁ㐍ࢭࣥࢱ࣮㸧࡛ࠖᐇ᪋ࡋࡓࡶࡢ࡛࠶ࡿࠋ
Application of automatic analysis system of Strontium-90 to analysis of environmental sample
FUJITA, H., NOJIMA, T., NAGAOKA, M., OSAWA, T., H., ONO, H.

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

3A07ᾮయࢩࣥࢳ࣮ࣞࢩࣙࣥ࢝࢘ࣥࢱࢆ⏝࠸ࡓᢳฟࢩࣥࢳ࣮ࣞࢱ࡟ࡼࡿ 89Sr ࡜
90
Sr ࡢᘚู ᐃἲࡢ᳨ウ㔠ἑ኱㝔⮬↛ ࠊ㔠ἑ኱Ꮫ㝿ࢭ ࠊ㔠ἑ኱⌮ᕤ  ‫ۑ‬㓇஭ᾈ❶ ࠊୖᮡṇᶞ ࠊᶓᒣ᫂ᙪ 䛆⥴ゝ䛇ᨺᑕᛶࢫࢺࣟࣥࢳ࣒࢘ࡣࠊேయ࡬ࡢᙳ㡪ࡀᙉࡃࠊ㔜せ࡞ࣔࢽࢱࣜࣥࢢ᰾✀࡛࠶ࡿࠋ2011ᖺ 3 ᭶࡟Ⓨ⏕ࡋࡓ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾ࡛ࡣࠊ90Sr ࡜࡜ࡶ࡟஦ᨾึᮇ࡟ࡣ 89Sr(༙ῶᮇ50.52 ᪥)ࡶᨺฟࡉࢀ࡚࠸ࡓࡀࠊࡑࢀࡽࡢᐃ㔞⤖ᯝࡣ㠀ᖖ࡟ᑡ࡞࠸ࠋᡃࠎࡣࠊ஦ᨾึᮇ࡟ 90Sr
࡜ 89Sr ࡢᘚู ᐃࢆྍ⬟࡟ࡍࡿࡓࡵ࡟ࠊᅛ┦ᢳฟࢹ࢕ࢫࢡ࡟ࡼࡿ⢭〇࡜ᢳฟࢩࣥࢳ࣮ࣞࢱ࡟
ࡼࡿᾮయࢩࣥࢳ࣮ࣞࢩࣙࣥ࢝࢘ࣥࢱ(LSC) ᐃࢆ⤌ࡳྜࢃࡏࡓ㎿㏿ᐃ㔞ἲࢆ㛤Ⓨࡋ࡚ࡁࡓࠋ୍
⯡ⓗ࡟ 89Sr ࡢ ᐃ࡟ࡣࢳ࢙ࣞࣥࢥࣇග ᐃࡸங໬ࢩࣥࢳ࣮ࣞࢱࢆ⏝࠸ࡿࡇ࡜ࡀከ࠸ࡀࠊᮏ◊✲࡟࠾࠸࡚ࡣࠊࢳ࢙ࣞࣥࢥࣇග࡜ᢳฟࢩࣥࢳ࣮ࣞࢱࢆ⏝࠸ࡿ᪉ἲࢆẚ㍑᳨ウࡋࡓࠋ䛆᪉ἲ䛇㻌 ࢳ࢙ࣞࣥࢥࣇග࡟ࡼࡿᘚู ᐃ࡛ࡣࠊ89Sr ࡜ 90Sr ΰྜ⁐ᾮ࠿ࡽ 90Y ࢆ㝖ཤศ㞳ࡋࡓᚋࠊ
LSC ࡛ࢳ࢙ࣞࣥࢥࣇග ᐃࡍࢀࡤࠊ89Sr ࡢィᩘࡀ࡛ࡁࡿࠋࡑࡢᚋࠊ⧞ࡾ㏉ࡋ ᐃࢆ⾜࠸ࠊ᪂ࡓ࡟⏕ᡂࡋࡓ 90Y ࡢᨺᑕ⬟ࢆᐃ㔞ࡍࢀࡤࠊ90Sr ࡢᨺᑕ⬟ࡀᐃ㔞ࡉࢀࡿࠋ୍᪉࡛ࠊᢳฟࢩࣥࢳࣞ
࣮ࢱ࡜ࡋ࡚ࠊࢺ࢚ࣝࣥࢩࣥࢳ࣮ࣞࢱ࡟ HDEHP ࢆ 20㸣ΰྜࡋࡓࡶࡢࢆ⏝࠸ࢀࡤࠊFig. 1 ࡢࡼ࠺࡟ࠊᢳฟ᮲௳ pH 2 ࡛ࡣ Y ࡢࡳࡀᢳฟࡉࢀࠊpH 5 ࡛ࡣ Sr ࡜ Y ࡢ୧᪉ࡀᢳฟࡉࢀࡿࡇ࡜࡟ࡼࡾᘚู ᐃࡀ࡛ࡁࡿࠋࡲࡓࠊᢳฟࢩࣥࢳ࣮ࣞࢱ࡛ࡣࠊࢳ࢙ࣞࣥࢥࣇගࡼࡾィᩘຠ⋡ࡀ㧗ࡃࠊங໬ࢩࣥࢳ࣮ࣞࢱࡼࡾࡶࢡ࢚ࣥࢳࣥࢢࡀᑠࡉ࠸ࡓࡵࠊࡇࢀࡽ஧ࡘࡢ ᐃἲࡼࡾࡶࠊຠ⋡ࡼࡃᨺᑕ⬟ࢆィᩘࡍࡿࡇ࡜ࡀ࡛ࡁࡿࠋ
䛆ᐇ㦂䛇 (a)ࢳ࢙ࣞࣥࢥࣇග࡜ᢳฟࢩࣥࢳ࣮ࣞࢱࢆ⤌ࡳྜࢃࡏࡓ ᐃ
89
Sr ࡜ 90Sr ࡢΰྜࢺ࣮ࣞࢧ࣮⁐ᾮࢆㄪ〇ࡋ࡚⏝࠸ࠊSr ࠿ࡽ Y ࢆศ㞳ᚋ㸪90Y ࡢ⏕ᡂ⋡ࡀప࠸࠺ࡕ࡟ࢳ࢙ࣞࣥࢥࣇගࢆ㏿ࡸ࠿࡟

ᐃࡋࠊ

89

Sr ࡢィᩘࢆ⾜ࡗࡓࠋࡑࡢᚋࠊᢳฟࢩࣥࢳ࣮ࣞࢱࢆῧຍࡋࠊpH 2 ࡢ

Y ࡢࡳࡀᢳฟࡉࢀࡿ᮲௳࡛ࠊ⧞ࡾ㏉ࡋᢳฟᐃࢆ⾜ࡗࡓࠋ(b)ᢳฟࢩࣥࢳ࣮ࣞࢱ࡟ࡼࡿ஧ᒙἲࢆ⏝࠸ࡓ
89

ᐃ㸦෌

ᐃἲ㸧

90

Sr ࡜ Sr ࡢΰྜࢺ࣮ࣞࢧ࣮⁐ᾮ࠿ࡽࠊSr ࡜ Y ࢆศ㞳ࡋࡓᚋࡢ Sr

ࡢ⁐ᾮࢆࠊpH 5 ࡛ SrࠊY ࡀᢳฟࡉࢀࡿ᮲௳࡛ ᐃࡋࠊ90Sr㸩89Sr
ࡢᨺᑕ⬟ࢆィᩘࡋࡓࠋࡑࡢᚋ෌

ᐃ࡟ࡼࡾࠊ90Y ࡢᡂ㛗ࢆᐃࡋࠊ

Fig.1 ᢳฟࢩࣥࢳ࣮ࣞࢱἲ

᫬㛫⤒㐣࡜ 90Y ᡂ㛗࠿ࡽ 90Sr ࡢ㔞ࢆィ⟬ࡋࠊ90Sr+89Sr ࠿ࡽ 90Sr ศࢆᕪࡋᘬ࠸࡚ࠊ89Sr ࢆồࡵࡓࠋ䛆⤖ᯝ䛇 ࢳ࢙ࣞࣥࢥࣇග࡟ࡼࡿ ᐃ࡟ࡘ࠸࡚ࠊ89Srࠊཬࡧ 90Y ࡢィᩘຠ⋡ࡣࠊࡑࢀࡒࢀ 36%ࠊ58%࡛࠶ࡿࡓࡵࠊ90Sr ࡢᐃ㔞࡟ࡣࠊ90Y ࢆ࠶ࡿ⛬ᗘᡂ㛗ࡉࡏࡿࡓࡵࡢࠊ1 㐌㛫⛬ᗘࡢ᫬㛫ࢆせࡋࡓࠋᮏᐇ㦂⤖ᯝ࠿ࡽࠊᐇ㦂(a)ࡢ ࢳ࢙ࣞࣥࢥࣇග࡟ࡼࡿ 89Sr ࡢᐃ㔞ࡣࠊࢺ࣮ࣞࢧ࣮ࡢῧຍ㔞࡜Ⰻ࠸୍⮴ࢆ♧ࡋࡓࠋᢳฟࢩࣥࢳ࣮ࣞࢱ࡟ࡼࡿ 90Y ࡢᐃࡣࠊィᩘຠ⋡ࡀ 90%࡛࠶ࡾࠊࣂࢵ

ࢡࢢࣛ࢘ࣥࢻࡶࢳ࢙ࣞࣥࢥࣇග ᐃࡼࡾࡶᑠࡉࡃࠊ2ࠊ3 ᪥⛬ᗘ࡛ 90Sr ࢆᐃ㔞ࡍࡿࡇ࡜ࡀ࡛ࡁ
ࡓࠋᐇ㦂(b)ࡢ 89Sr+90Sr ᐃ㔞࡟ࡘ࠸࡚ࠊ90Y ࡢᡂ㛗࠿ࡽ 90Sr ࡢᨺᑕ⬟ࢆồࡵࡓࡀࠊ89Sr ࡢῶ⾶࡜90

Y ࡢᡂ㛗ࡢ࿴࡜࡞ࡿࡓࡵࠊ89Srӑ90Sr ࡢ᮲௳࡛ࡣࠊ90Sr ࡢᐃ㔞⢭ᗘࡀపୗࡋࠊ㏫࡟ 89SrӐ90Sr

ࡢ᮲௳࡛ࡣࠊ89Sr ࡢᐃ㔞⢭ᗘࡀపୗࡍࡿࡀࠊ඲యⓗ࡟ࡣᏳᐃࡋࡓ ᐃࡀᚓࡽࢀࡓࠋ
Study of Selective Measurement for 89Sr and 90Sr by Extractive Scintillator with a Liquid Scintillation
Counter
SAKAI, H., UESUGI, M., YOKOYAMA, A.

- 71 -



3B01

ప

㻯㻞㻴㻠㻛㻭㼞 䝬䝖䝸䝑䜽䝇୰䛾Ꮩ❧ 㻡㻣㻲㼑 ཎᏊ䛾໬Ꮫ≧ែ㻌(㟁㏻኱㝔 1ࠊ⌮◊ 2ࠊᮾ⌮኱⌮ 3ࠊICU4ࠊ㜰኱⌮ 5ࠊ㔠ἑ኱⌮ᕤ 6ࠊ໭㝣኱⸆ 7ࠊ㔞◊ᶵᵓᨺ་◊ 8) 㕥ᮌ⪷ே 1ࠊ㇂ᕝ⚈ኴ㑻 1ࠊబ⸨♸㈗Ꮚ 1ࠊᑠᯘ⩏⏨ 1,2ࠊᒣ
⏣ᗣὒ 3ࠊஂಖㅬဢ 4ࠊ୕ཎᇶႹ 5ࠊ㛗཭ഔ 2ࠊబ⸨΅ 6ࠊᐑ㷂῟ 7ࠊబ⸨┾஧ 8ࠊ໭ᕝᩔᚿ 8䛆⥴ゝ䛇㻌 ᡃࠎࡣࠊ㔜࢖࢜ࣥຍ㏿ჾࢆ⏝࠸࡚▷ᑑ࿨࣓ࢫࣂ࢘࢔࣮ぶ᰾ 57Mn㸦༙ῶᮇ 1.45 ศ㸧ࢆᅛయ
ヨᩱ୰࡟┤᥋࢖࢜ࣥὀධࡋࠊș ቯኚ࡛⏕ᡂࡋࡓບ㉳≧ែࡢ 57Fe ࡀᨺฟࡋࡓ࣓ࢫࣂ࢘࢔࣮Ț ⥺ࢆᐃࡍࡿࠕ࢖ࣥࣅ࣮࣒࣭࣓ࢫࣂ࢘࢔࣮ศගἲࠖࢆ㛤Ⓨࡋࡓࠋᮏᡭἲ࡛ࡣࠊ57Fe ࡀᅛ⁐ࡋ࡞࠸ヨᩱ࡛ࡶᏙ❧ࡋࡓ Fe ཎᏊࡢ㟁Ꮚ≧ែࡸ㓄఩⎔ቃࡢࡑࡢሙほ ࡀྍ⬟࡛࠶ࡿࠋᮏ◊✲࡛ࡣࠊ࢚ࢳࣞࣥ/࢔ࣝࢦࣥΰྜẼయࢆప࡛จ⦰ࡉࡏࡓ࣐ࢺࣜࢵࢡࢫࢆὀධヨᩱ࡜ࡋࡓ࢖ࣥࣅ࣮࣒࣭࣓ࢫࣂ࢘࢔࣮ࢫ

࣌ࢡࢺࣝࢆ ᐃࡋࡓࠋᚓࡽࢀࡓ࣓ࢫࣂ࢘࢔࣮ࣃ࣓࣮ࣛࢱ࡜ DFT ィ⟬ࡢ⤖ᯝ࠿ࡽࠊ࣐ࢺࣜࢵࢡࢫ୰
࡛⏕ᡂࡋࡓ Fe ໬Ꮫ✀࡜ Fe ཎᏊࡢ㟁Ꮚ≧ែ࡟ࡘ࠸࡚ሗ࿌ࡍࡿࠋ
䛆ᐇ㦂䛇㻌 ᐇ㦂ࡣᨺᑕ⥺་Ꮫ⥲ྜ◊✲ᡤࡢ㔜࢖࢜ࣥຍ㏿ჾ HIMAC ࡛⾜ࡗࡓࠋ᰾Ꮚ࠶ࡓࡾ 500 MeV
࡟ຍ㏿ࡋࡓ୍ḟࣅ࣮࣒ 58Fe ࢆ Be ᶆⓗ࡟↷ᑕࡋࠊධᑕ᰾◚○཯ᛂ࡛⏕ᡂࡋࡓ 57Mn ࢆศ㞳ࠊ᭱㐺໬ᚋࠊప ࡟ಖᣢࡋࡓ C2H4/Ar ࣐ࢺࣜࢵࢡࢫヨᩱ࡟┤᥋ὀධࡋࡓࠋヨᩱࡣࣃࣝࢫࢳ࣮ࣗࣈ෭෾ᶵ࡛
17 K ࡟ಖᣢࡋࡓᇶᯈୖ࡟ C2H4/Ar ࢞ࢫ㸦ΰྜẚ C2H4:Ar = 3:7㸧ࢆ⣙ 38 ᫬㛫ᑟධࡋ࡚స〇ࡋࡓࠋ࣓ࢫࣂ࢘࢔࣮Ț⥺ࡣࠊᖹ⾜ᖹᯈ㟁Ꮚ࡞ࡔࢀᆺ࢝࢘ࣥࢱ࣮ (PPAC) ࢆ⏝࠸᳨࡚ฟࡋࡓࠋ
䛆⤖ᯝ䛸⪃ᐹ䛇㻌 ᚓࡽࢀࡓ࢖ࣥࣅ࣮࣒࣭࣓ࢫࣂ࢘࢔࣮ࢫ
࣌ࢡࢺࣝࢆ Fig. 1 ࡟♧ࡍࠋࢫ࣌ࢡࢺࣝࡣࠊ1 ᡂศࡢ
singlet ࡜ 3 ᡂศࡢ doublet ࡛ゎᯒࡋࡓࠋᡂศ A ࡜ Bࡣࠊࡇࢀࡲ࡛ࡢ⤖ᯝ࠿ࡽࠊࡑࢀࡒࢀບ㉳≧ែࡢ Fe+(d7)࠾ࡼࡧᇶᗏ≧ែࡢ Fe+(d6s1)࡜ᖐᒓࡋࡓ 1)ࠋṧࡾࡢᡂศC (G= Ѹ0.30(6) mm/s, 'EQ = 2.05(7) mm/s), D (G= Ѹ
0.39(5) mm/s, 'EQ = 4.66(9) mm/s) ࡟ࡘ࠸࡚ࠊFe ࡢ໬Ꮫ✀࡜ࡑࡢ㟁Ꮚ≧ែ࡟ࡘ࠸࡚ ORCA ࢆ⏝࠸࡚ DFT ᵓ
Fe ཎᏊ࡟ C2H4㐀᭱㐺໬ィ⟬ࢆᐇ⾜ࡋࡓ 2)ࠋࡑࡢ⤖ᯝࠊ

Fig. 1. Mössbauer emission spectra of 57Fe (← 57Mn) in a
C2H4 and Ar matrix (C2H4:Ar = 3:7) measured at 17K. The
isomer shift is given relative to Fe metal at room
temperature.

ศᏊࡀ 1 ࡲࡓࡣ 2 㓄఩ࡋࡓ໬Ꮫ✀ࡀᏳᐃᵓ㐀࡜࡞ࡿࡇ࡜ࡀ♧ࡉࢀࡓࠋᡂศ CࠊD ࡟ࡘ࠸࡚ࠊ࣓ࢫࣂ࢘࢔
࣮ࣃ࣓࣮ࣛࢱ࡜ DFT ィ⟬⤖ᯝ࡞ࡽࡧ࡟ Yamada ࡽ࡟ࡼࡿ࣐ࢺࣜࢵࢡࢫ༢㞳ᐇ㦂⤖ᯝ 3)࡜ẚ㍑ࡋ࡚㆟ㄽࡍࡿࠋ
References:
1) Tanigawa, S., et al. Hyp. Int. 2016, 237, doi
10.1007/s10751-016-1261-1.
2) Neese, F. Wiley Interdisc. Rev. Comp. Mol. Sci., 2012, 
Fig. 2. Optimized structure of (C) Fe(C2H4).

2, 73-78.
3) Yamada, Y., et al. J. Radioanal. Nucl. Chem. 2003, 255, 419-423.

Chemical State of Isolated 57Fe Atoms Decayed from 57Mn Implanted into a C2H4/Ar matrix
SUZUKI, M., TANIGAWA, S., SATO, Y., KOBAYASHI, Y., YAMADA, Y., KUBO, K., MIHARA,
M., NAGATOMO, T., MIYAZAKI, J., SATO, W., SATO, S., KITAGAWA, A.

- 72 -



3B02







m ÐÃm u







} Nº´¨ sµ¡ 

Relative intensity (%)

  Éª°"²ÒrÒ! *ªZÉ FeN "oe 1990 {L!F+M À½¬&`"±¾%(+!]A£" FeN #(+(+$ÌIÊËg"γ’’-FeN vkg" γ’’’-FeN "`* ,+,+#ª°ÏbDÉ->@1@¸¤*!'ªZÉ-`*ª°dWh|-¿*!'γ’’-FeN γ’’’-FeN "²-lZ*-¦ #¯|"Ñ γ’’’-FeN -`"<27/.@2904="|lZ(6@=-p³! ia* YAG >@1@(NewWave, TEMPEST 10)" «HÑ¿(532 nm)-U>?3!')Î
RÈtÉ->@1@¸¢ ® 10 B8=2-©¬*!'<27/.@VRp![V Ç"¹·¾- -Fe ! ¬¹·^%# 1 μm §| * >@1@¸¤h.=:5/;h(^% 40 μm)-O ª°dW 70 P ¸¤"h
|- 773 K *nÍ"¯­ γ’’’-FeN ¹·-* <27/.@2904="p#ªZÉ¹·-.=:5/;hC!P$$ÂÄ!')
p¾|- 6 300 K !lZ  ¸¤"h|- 573 K MC!
100
ªZÉ¹·-*γ’’-FeN "S300 K
98γ’’’-FeN (+ γ’’’-FeN _~¥ )
96100
6 K <27/.@2904=-p* 30 T
99
275 K
"TÅ¥j-¦"J!nÍ!'
98
100
50 T "TÅ¥j-¦E¯¼(+ ¸¤99
260 K"h|-(!Ñ" 773 K *m
98TÅ¥j-¦nÍ"γ’’’-FeN ¹
100
99
230 K
·(+ "¾"<27/.@290498="p|!'*lZ-c 1 !¦ γ’’’-FeN
100#qKÁ#x¥-¦|-D*
200 K
99
98
¥V»(30 T)-¦_~¥ * (+100
2904="\Qy#&&m Q *G150 K99
(TÅ¥j#Vw)³n"mV
100w *¶ (+* "TÅ¥jVw"Y
100 K99Æzf-zfTÅ¥j"Q"|lZ
100(6@= 230 K !oe*V
6K
99

98
-10
-5
0
5
10

 ¯|"Ñ vkgγ’’’-FeN -`*
Velocity (mm/s)
!X "¾"<27/.@2904="|lZ-p6 K # 30 T -¦ cÒ vkgγ’’’-FeN ¹·"<27/.
@2904= (p| 6 300 K)
6@=# 230 K  *( 

Mössbauer spectra of the rock-salt structured iron nitride
YAMADA, Y., SATO, M., KOBAYASHI, Y.

- 73 -

ġᙉ☢ᛶ࡜ගゐ፹ࡢ≉ᛶࢆ♧ࡍࢫࢬࢻ࣮ࣉ㓟໬ࢳࢱࣥࡢ 6Q ࣓ࢫࣂ࢘࢔

% ࣮ࢫ࣌ࢡࢺࣝ

ᮾ⌮኱ ୰⛉㝔኱㐃໬≀◊  ࠐ㔝ᮧ㈗⨾ ࠊ$6*DQHVKUDMDࠊ⋤㌷⹡ 䛆⥴ゝ䛇㻌 㓟໬ࢳࢱࣥࡢ⢏Ꮚࡣࠊගゐ፹ᶵ⬟ࢆ᭷ࡍࡿࡇ࡜ࡀ▱ࡽࢀ࡚࠸ࡿࠋ᭱㏆ࠊᚤ㔞ࡢ 6Q ࢆࢻ࣮ࣉࡍࡿࡇ࡜࡟ࡼࡾ 7L2 ࢼࣀ⢏Ꮚࡢගゐ፹άᛶࡀྥୖࡍࡿࡇ࡜ࡀࢃ࠿ࡗࡓࠋࡲࡓࠊࢫࢬࢻ
࣮ࣉ㓟໬ࢳࢱࣥࡣࠊ㠀☢ᛶࡢඖ⣲࠿ࡽᵓᡂࡉࢀ࡚࠸ࡿ࡟ࡶ࠿࠿ࢃࡽࡎࠊᙉ☢ᛶࢆ♧ࡋࡓࠋࡇࢀࡽࡢ㓟໬ࢳࢱࣥ⢏Ꮚ୰ࡢࢫࢬࡢ≧ែࢆ᫂ࡽ࠿࡟ࡍࡿࡓࡵ࡟ 6Q ࣓ࢫࣂ࢘࢔࣮ࢫ࣌ࢡࢺࣝࢆ ᐃࡋࠊゎᯒࢆࡋࡓ⤖ᯝࢆሗ࿌ࡍࡿࠋ
䛆ᐇ㦂䛇㻌 ᚤ㔞ࡢ 6Q ࢆࢻ࣮ࣉࡋࡓ 7L2 ࡢࢼࣀ⤖ᬗ⢏ᏊࢆỈ⇕ྜᡂἲ࡟ࡼࡾస〇ࡋࡓࠋ;5'ࠊගゐ፹࡜☢Ẽ≉ᛶࡢ ᐃࢆ⾜ࡗࡓࠋࡲࡓࠊP6Q 7 G  ࡢ NH9 ࡢȚ⥺ 0%T ௨ୗ ࢆ⏝࠸࡚ᐊ
6Q ࣓ࢫࣂ࢘࢔࣮ࢫ࣌ࢡࢺࣝࢆ ᐃࡋࡓࠋࢫ࣌ࢡࢺࣝࡢࣆ࣮ࢡࡣࠊࡑࢀࡽࡢ༙
್ᖜࡀࡍ࡭࡚ྠࡌ࣮ࣟࣞࣥࢶ㛵ᩘ࡜ࡋ࡚ゎᯒࡋࡓࠋࢻࢵࣉ࣮ࣛ㏿ᗘࡣȘ)H ࡢࢫ࣌ࢡࢺࣝ࠿ࡽࠊ
ࡲࡓᇶ‽≀㉁ &D6Q2 ࡢ␗ᛶయࢩࣇࢺ ,6 ࢆ PPV ࡜ࡋ࡚㏿ᗘᰯṇࡋࡓࠋ䛆⤖ᯝ䛇㻌 ᐃࡋࡓ ;5' ࠾ࡼࡧ㏱㐣㟁Ꮚ㢧ᚤ㙾࡛ࡣࠊ6Q7L ࡢ๭ྜ [    ࡲ࡛ࡣ࢔ࢼࢱ࣮
ࢮᆺ 7L2 ࡀ୺ᡂศ࡛ࠊ[  ࡛ࡣ࢔ࢼࢱ࣮ࢮᆺ࡜ࣝࢳࣝᆺࡢΰᬗ 7L2 ࢼࣀᚤ⢏Ꮚࠊ[  ࡛ࡣࣝࢳࣝᆺ 7L2 ࡜ 6Q2 ࡢΰྜ≀ࡀㄆࡵࡽࢀࡓࠋගゐ፹≉ᛶ࡛ࡣࠊ[  ࡢ࡜ࡁ࡟᭱ࡶ኱ࡁ࡞άᛶࢆ♧ࡋࡓࠋ6Q ࣓ࢫࣂ࢘࢔࣮ࢫ࣌ࢡࢺࣝࡢゎᯒࡣࠊࡣࡌࡵ㸰ࡘࡢࢲࣈࣞࢵࢺ ' ࡜㸱ࡘࡢࢲࣈࣞࢵࢺ ' ࡜ࡋ࡚ࣇ࢕ࢵࢸࣥࢢࢆヨࡳࡓࠋࡋ࠿ࡋࠊ6Q ࡢ౯ᩘࡣࠊࡍ
࡭࡚ 6Q࡛ࠊᙉ☢ᛶࢆ♧ࡍࡇ࡜࠿ࡽ☢Ẽศ⿣ᡂศ 6 ࢆྵࡴ '6 ࡲࡓࡣ '6 ࡜ࡋ࡚࣓ࢫ
ࣂ࢘࢔࣮ࢫ࣌ࢡࢺࣝࢆゎᯒࡋࡓࠋࡇࢀࡽࡢࢫ࣌ࢡࢺࣝࢆᅗ㸯࡟♧ࡍࠋෆ㒊☢ሙࡢ኱ࡁࡉࡣࠊ

6Q ࡣ㠀☢ᛶ࡟ࡶ࠿࠿ࢃࡽࡎࠊ⣙㸱7 ࢆ♧ࡋࡓࠋ960 ࡢ⤖ᯝ࡛ࡣࠊ6Q7L[    ࡢ᫬࡟᭱኱ࡢ㣬࿴☢໬ 0V PHPXJ ࠾ࡼࡧṧ␃☢໬ 0U PHPXJ ࢆ♧ࡋࡓࠋࡑࢀ௨ୖࡢࢻ࣮
ࣉ࡛ࡣ☢໬⋡ࡣᑠࡉࡃ࡞ࡗࡓࠋ࢔ࢼࢱ࣮ࢮᆺ 7L2 ࡟ 6Q㸲ࡀྲྀࡾ㎸ࡲࢀࠊࢼࣀ⢏Ꮚ⤖ᬗࡢࡦࡎࡳ࡜Ḟ㝗ᵓ㐀࡟ࡼࡾෆ㒊☢ሙࡀ⏕ࡌࡿࠋ☢Ẽศ⿣ᡂศࡣࠊ6Q ࢻ࣮ࣉࡀከ࠸࡜㓟໬ࢫࢬࡢࢼࣀ⢏Ꮚࡀᯒฟࡋࠊࡑࡢ⏺㠃࡞࡝࡟཯ᙉ☢ᛶⓗ࡟ࡩࡿࡲ࠺ࡇ࡜࡟ࡼࡿ࠿ࠊࡲࡓࡣࠊࢫࣆ
ࣥࡢᦂࡽࡂࡀ㐜ࡃ࡞ࡿࡇ࡜࡟ࡼࡿ
ᖖ☢ᛶ⦆࿴ᡂศ࡜⪃࠼ࡽࢀࡿࠋ
ᅗ㸯 㓟໬ࢳࢱࣥࡢ 119Sn ࡢ࣓ࢫࣂ࢘
࢔࣮ࢫ࣌ࢡࢺࣝᕥ ࡢ ୖ ࠿ࡽ Sn/T-x=0.05%ࠊ 0.17%,
0.30%, 1.14%, 1.37%



6Q0RVVEDXHUVWXG\RQ6Q7L2QDQRFU\VWDOVZLWKIHUURPDJQHWLFDQGSKRWRFDWDO\WLFSURSHUWLHV
12085$.L\RVKL*$1(6+5$-$$6XQGDUDP:$1*-XQKX

- 74 -

3B04

f ㌶㐨㟁Ꮚࡢ⤖ྜ≉ᛶ࡜࣐࢖ࢼ࣮࢔ࢡࢳࣀ࢖ࢻศ㞳ᣲືࡢ┦㛵ཎᏊຊᶵᵓ ࠊᗈᓥ኱㝔⌮ ࠊᗈᓥ኱ N-BARD ‫ۑ‬㔠Ꮚᨻᚿ ࠊΏ㑓㞞அ ࠊᐑୗ┤ ࠊ୰ᓥぬ ࠙⥴ゝࠚ࣐࢖ࢼ࣮࢔ࢡࢳࣀ࢖ࢻ(MA)ࡢศ㞳࣭᰾ኚ᥮ᢏ⾡㛤Ⓨࡢ୍⎔࡜ࡋ࡚ࠊMA ࡜ࣛࣥࢱࣀ
࢖ࢻ(Ln)ࡢศ㞳ࣉࣟࢭࢫࡢᵓ⠏ࡣ㔜せ࡞ㄢ㢟࡛࠶ࡿࠋ⁐፹ᢳฟ࡟ࡼࡿ MA/Ln ศ㞳ᐇ㦂࡟ࡼࡾࠊ◲㯤ࡸ❅⣲࡞࡝ࡢࢯࣇࢺࢻࢼ࣮ࡀ Ln ࡟ᑐࡋ࡚ MA ࢆ㑅ᢥⓗ࡟ศ㞳ࡍࡿࡇ࡜ࡀ᫂ࡽ࠿࡜࡞ࡗ࡚
ࡁࡓ[1]ࠋࡇࢀࡣࠊࢻࢼ࣮࡜ࡢ⤖ྜᛶࡀ MA ࡜ Ln ࡛␗࡞ࡿࡇ࡜ࡀཎᅉ࡛࠶ࡿࡇ࡜ࡀ♧၀ࡉࢀ࡚࠸ࡿࡀࠊヲ⣽ࡣ᫂ࡽ࠿࡛࡞࠸ࠋᡃࠎࡣࠊィ⟬໬Ꮫⓗᡭἲ࡛࠶ࡿᐦᗘỗ㛵ᩘἲࢆ⏝࠸࡚ࠊMA/Lnศ㞳࣓࢝ࢽࢬ࣒ࢆศᏊ࡛ࣞ࣋ࣝ⌮ゎࡍࡿࡇ࡜ࢆ┠ᣦࡋ࡚࠸ࡿࠋᮏ◊✲࡛ࡣࠊAm/Eu ศ㞳ᣲື࡟╔┠ࡋࠊd ࠾ࡼࡧ f 㟁Ꮚ࡜ࡢ⤖ྜ≉ᛶ࡜㛵㐃௜ࡅ࡚㆟ㄽࢆ⾜࠺ࠋ࠙ィ⟬ࠚ඲࡚ࡢᐦᗘỗ㛵ᩘィ⟬࡟ࡣࠊࣉࣟࢢ࣒ࣛ ORCA ࢆ⏝࠸ࡓ[2]ࠋィ⟬࡟ࡣࠊᐇ㦂ࡢ Am/Euศ㞳ᣲືࢆࡼࡃ෌⌧ࡍࡿ ZORA-B2PLYP ⌮ㄽࢆ⏝࠸ࡓ[3]ࠋࣔࢹࣝ㘒యࡣࠊࢪࢳ࢜࣍ࢫࣇ࢕ࣥ
㓟㘒య[M(Me2PS2)3]࡜ 9 Ỉ࿴㘒య[M(H2O)9]3+࡜ࡋࠊ༢⤖ᬗᵓ㐀ࢆཧ↷ࡋ࡚సᡂࡋࡓࠋ
࠙⤖ᯝ࡜⪃ᐹࠚᵓ㐀᭱㐺໬ィ⟬࡟ࡼࡗ࡚ᚓࡽࢀࡓᵓ㐀ࡣࠊᐇ㦂್ࡢᗄఱᏛࢆࡼࡃ෌⌧ࡋࡓࠋཎᏊ౯㡿ᇦ࡟࠾ࡅࡿศᏊ㌶㐨ࡢ࠺ࡕࠊd, f ㌶㐨⏤᮶ࡢ௦⾲ⓗ࡞ MO ࢆ Fig. 1 ࡟ᅗ♧ࡋࡓࠋd ㌶
㐨㟁ᏊࡣࠊEu, Am ࡢ㐪࠸ࡸࢻࢼ࣮ࡢ㐪࠸࡟ࡼࡽࡎ⤖ྜⓗ࡞㔜࡞ࡾࢆᣢࡘࠋ୍᪉ࠊf ㌶㐨㟁Ꮚࡣࠊࢻࢼ࣮ࡢ㐪࠸࡟ࡼࡾ Eu ࡜ Am ࡛⤖ྜᵝᘧࡀ␗࡞ࡾࠊ≉࡟ Am ࡛ࡣࠊ◲㯤ࢻࢼ࣮࡜ࡣ⤖ྜⓗࡔࡀࠊ㓟⣲ࢻࢼ࣮࡜ࡣ཯⤖ྜⓗ࡛࠶ࡗࡓࠋࡇࡢ⤖ᯝࡣࠊAm/Eu ศ㞳ᣲື࡟኱ࡁࡃᐤ୚ࡋ࡚
࠸ࡿࡢࡣࠊd ㌶㐨࡛࡞ࡃ f ㌶㐨࡛࠶ࡿࡇ࡜ࢆ♧၀ࡋ࡚࠸ࡿࠋᮏⓎ⾲࡛ࡣࠊ㓟⣲ࢻࢼ࣮࡛࠶ࡿ࣍
ࢫࣇ࢕ࣥ㓟㘒య࡜ࡢẚ㍑ࡸ Mulliken ࡢᐦᗘゎᯒἲࢆ⏝࠸࡚ࠊఱࡀ Am/Eu 㑅ᢥᛶࢆỴᐃࡋ࡚࠸ࡿ࠿࡟ࡘ࠸࡚ࡼࡾヲ⣽࡟㆟ㄽࢆ⾜࠺ࠋd-electron

f-electrond-electron

f-electron

M=Eu
⤖ྜⓗ

㠀⤖ྜⓗ

⤖ྜⓗ

⤖ྜⓗ

⤖ྜⓗ

⤖ྜⓗ

⤖ྜⓗ

཯⤖ྜⓗ

M=Am

(b) [M(H2O)9]3+(a) [M(Me2PS2)3]

Fig. 1 (a) ◲㯤ࢻࢼ࣮㘒యࠊ(b) Ỉ࿴㘒యࡢ d ࠾ࡼࡧ f ㌶㐨⏤᮶ࡢศᏊ㌶㐨

࠙ཧ⪃ᩥ⊩ࠚ
[1] K. L. Nash, Solvent Extr. Ion Exch., 1993, 11, 729.
[2] F. Neese, WIREs Comput. Mol. Sci., 2012, 2, 73.
[3] M. Kaneko, S. Miyashita, S. Nakashima, Inorg. Chem., 2015, 54, 7103.
Correlation between the bonding property of f-orbital electron and the separation behavior ofminor-actinides
KANEKO, M., WATANABE, M., MIYASHITA, S., NAKASHIMA, S.

- 75 -



3B05




µ¦¤J$d'/90. Cs! Sr&_¬!*$Ç30w.|ß&i


^iÙ½rÜà¥M®o¹tÐ ¿sÄFakZ¸ÞK

137



.)´h$I¯jW©&Ùq14D%\#XÝ©%1-WY!6@2D3E;B0Q¶Cs'&

Sr%WÎ/u×Yb±~)A76i¡~i

&H±~O¡~#"%³}0

.=1<C>B4C5E?DáVertrel XFFig.1â0u×Y!¯jW$+.2@D%XÝ0ge
Ã

.

½

&V¨«c²0d(HFCáVertrel MCAVertrel XHâ0u

×Y6@2D3E;BáFig.1â0WY!J~¤¯ª,%Sr%ÕºW0Î   ¤»& Sr 0d(J~¤¯ª!»& DCH18C6!VWYáFig.1â0 HFC $¯Ì¯ª!
»!»0«c!­nXÖ¢0§nÅØ%¤¤»% Sr °x0 ICP-AES'»J%VWÚP%Fig.1 u×YWYV

WY%ÓyXAFS ­n!Øk]mÍÆ$+.ÓÌ0Ê   XÖ¢&5 10X vË$Ôi Ç10000¾áFig. 2â TX$+.W]mÂ%VWY%ÖN&2áFig. 3â XAFS­n%È&Sr-SrLÚ

P%{0z¾f-Sr-SrÒÝ&4Áx!É,/.áFig. 4â

Fig.2 XÖ¢%ÛS

Fig.3 XÖ¢%Vl~

WY°xSl~

Fig.4 VWÚP%ÓÌÈ ½Ã0Ê$ - HFC 0R   Chemours CompanyXAFS ­n$[Z  pUÀm½ÃÏ%¼ £Øk]mÍÆ$[Z  ^imÙq½ÃÍÆm8D9E%79:>$`Ñ·G' 
1) K. K. Gupta, et al., Sol. Extr. Ion Exch., 21 (2003) 53.
2) T. Yamamura, J. Nucl. Sci. Technol., 47 (2010) 515.
Structure determination of extracted strontium complex from neutral contaminated water.
YAMAMURA, T., TAKAHASHI, A., NAGAI, M., SHIRASAKI, K.

- 76 -

3B06

㸳౯࢘ࣛࣥ㑏ඖ࡟࠾ࡅࡿ㔠ᒓࢥࣟ࢖ࢻࡢゐ፹ຠᯝཎᏊຊᶵᵓ  ‫ۑ‬໭㎷❶ᾈ ࠊ኱ෆ࿴ᕼ ࠊ㡢㒊἞ᖿ 

I / mA䛆⥴ゝ䛇㻌 ࢔ࢡࢳࣀ࢖ࢻඖ⣲ࡢ࠺ࡕ U, Np ཬࡧ Pu ࡣ㸴౯ࡸ㸲౯࡜࠸ࡗࡓ㧗ཎᏊ౯≧ែࢆ࡜ࡿࡓ
ࡵࠊ㓟ᛶᗘࡢప࠸⁐ᾮ୰࡛ࡣࠊỈ㓟໬≀㘒యࢆᙧᡂࡋࢥࣟ࢖ࢻࡸỿẊࢆ⏕ࡌࡿࠋྠ࢖࢜ࣥࡢ
⎔ቃ୰࡛ࡢືែண ࡢࡓࡵࠊỈ㓟໬≀࢖࢜ࣥ➼ࡢ㓄఩Ꮚ࡜ࡢ㘒⏕ᡂᐃᩘࡸࠊ࢖࢜ࣥࡢ⁐ゎᗘࢆồࡵࡿᖹ⾮ㄽⓗ࡞◊✲ࡀࡇࢀࡲ࡛⾜ࢃࢀ࡚ࡁࡓࠋ୍᪉ࠊ₇⪅ࡽࡢ᭱㏆ࡢ◊✲࡛ࡣࡇࢀࡽ࢖
࢜ࣥࡢཎᏊ౯ኚ໬࡜จ㞟⢏Ꮚ⏕ᡂࡀ஫࠸࡟స⏝ࡍࡿࡇ࡜ࡀศ࠿ࡗࡓࠋU(V)ࡢ㑏ඖࡣ㟁Ẽ໬Ꮫⓗ࡞㠀ྍ㏫ᛶࡀ㧗ࡃ㟁ᴟ཯ᛂ㏿ᗘࡀ㠀ᖖ࡟ᑠࡉ࠸ࡀࠊU(IV)ࢥࣟ࢖ࢻࡢᏑᅾୗ࡛ࡣ U(V)ࡢ㑏ඖ㏿ᗘࡀቑ኱ࡋࠊ㑏ඖ⏕ᡂ≀࡛࠶ࡿ U(IV)ࡢࢥࣟ࢖ࢻࡀᡂ㛗ࡍࡿࠋࡇࢀࡣࠊU(V)ࡢ㑏ඖ࡛⏕
ࡌࡓ U(IV)⮬㌟ࡀ U(V)ࡢ㑏ඖ཯ᛂࢆゐ፹ࡍࡿ࡜࠸࠺⮬ゐ፹཯ᛂ࡛࠶ࡿ࡜ゝ࠼ࡿࡀࠊヲ⣽࡞࣓࢝ࢽࢬ࣒ࡣ୙࡛᫂࠶ࡿࠋࡇࡇ࡛ U ௨እࡢ㔠ᒓࡢ㢮ఝ໬Ꮫ✀ࡀྠᵝ࡞ゐ፹స⏝ࢆ♧ࡍ࠿ྰ࠿ࢆ
᫂ࡽ࠿࡟ࡍࡿࡇ࡜ࡣࠊU(V)ࡢ⮬ゐ፹㑏ඖࢆ⌮ゎࡍࡿୖ࡛ࡶ⯆࿡῝࠸ࠋᮏⓎ⾲࡛ࡣࠊU(IV)ࡢ㢮ఝ໬Ꮫ✀࡜ࡋ࡚ Zr(IV)ࢆඹᏑࡉࡏࡓ⁐ᾮ᮲௳࡛ࡢ U(V)ࡢ㑏ඖࢆㄪ࡭ࡓ⤖ᯝ࡟ࡘ࠸࡚ሗ࿌ࡍࡿࠋ
䛆ᐇ㦂䛇㻌 6020 mm ࡢ㔠࣓ࢵࢩࣗ㟁ᴟࢆ෇⟄ᙧ࡟ࡋࡓస⏝ᴟࢆ⏝࠸࡚ᐃ㟁఩ᕪ㟁ゎࡋࠊ㟁ὶࡢ᫬㛫ኚ໬ࢆㄪ࡭ࡓࠋᾮ㔞 12 ml ࡢ㟁ゎࢭࣝࢆ⏝࠸ࠊཧ↷ᴟཬࡧᑐᴟ࡟ࡣࡑࢀࡒࢀ㖟㸫ሷ໬㖟㟁ᴟ㸦1M LiCl㸧ཬࡧⓑ㔠㟁ᴟࢆ⏝࠸ࡓࠋᨭᣢ㟁ゎ㉁ࢆྵࡴ࢘ࣛࣥ⁐ᾮ࡟㐣ሷ⣲㓟ࢪࣝࢥࢽ࢘
࣒ࢆῧຍࡋࠊ15 ศ㛫⬺Ẽࡋࡓᚋࠊ㟁Ẽ໬Ꮫ ᐃࡋࡓࠋU(V)ࢆணࡵㄪ〇ࡋ㛗᫬㛫Ᏻᐃ࡟ಖࡘࡇ
࡜ࡣᅔ㞴࡛࠶ࡿࡓࡵࠊU(VI)ࢆ U(V)࡟㑏ඖࡍࡿ㟁఩㸦-0.35V vs SSE㸧ࢆ༳ຍࡋ࡚㟁ゎࡋࠊ㟁ὶ್ࡢኚ໬ཬࡧ⁐ᾮࡢ≧ែኚ໬ࢆほᐹࡋࡓࠋ㟁ᴟୖ࡬ࡢᯒฟ཯ᛂࢆࢫࢺࣜࢵࣆࣥࢢ࣎ࣝࢱ࣓ࣥ
ࢺ࣮ࣜ࡟ࡼࡾㄪ࡭ࡓࠋ
䛆⤖ᯝཬ䜃⪃ᐹ䛇 ྑᅗ࡟ࡣඹᏑࡉࡏࡿ Zr(IV)⃰ᗘࢆኚ໬ࡉࡏࡓ pH 3.0 ࡢỈ⁐ᾮ୰ࡢ 1 mM
U(VI)ࢆ㟁ゎ㑏ඖࡋࡓ᫬ࡢ㟁ὶ್ࢆẚ㍑ࡋࡓࠋࡇࡇ࡛ࠊ⁐ᾮࡢ㓟ᛶᗘࡣࠊ㓟⁐ᾮࢆ୍ᗘ୰ᛶࡲ
࡛୰࿴ࡋࡓᚋࠊpH 3.0 ࡟ᡠࡋ࡚ㄪᩚࡋࡓࠋ᭤⥺ 1 ࡣ Zr
-3ࢆྵࡲ࡞࠸⁐ᾮ୰࡛ࡢࡶࡢ࡛࠶ࡾࠊ㟁ゎ㛤ጞ࠿ࡽ⣙ 400s ࡲ࡛ࡢ㟁ゎึᮇ࡟ࠊU(VI)࠿ࡽ U(V)࡬ࡢ㏿࠸㑏ඖ࡟ࡼ
-2
ࡿ U(VI)⃰ᗘࡢῶᑡ࡟ᑐᛂࡋࡓ㟁ὶࡢኚ໬ࡀほ ࡉࢀࡿࠋųO/<T +8⣙ 1200 s ௨㝆࡟ࡣ U(V)࠿ࡽ U(IV)࡬ࡢ⮬ゐ፹཯ᛂ࡟ࡼ
ųO/<T +8ࡿ≉ᚩⓗ࡞㟁ὶୖ᪼ࡀほ ࡉࢀࡓࠋ⁐ᾮ୰࡟ Zr(IV)ࢆඹ
-1
ų<TƳƠ
Ꮡࡉࡏࡿ࡜ࠊ㟁ゎึᮇࡢ U(VI)࠿ࡽ U(V)࡬ࡢ㑏ඖ㟁ὶ࡟ࠊ
U(V)ࡢ㑏ඖ㟁ὶࡀୖ஌ࡏࡉࢀࠊ㟁ゎึᮇ࠿ࡽ U(IV)ࡲ࡛
0㑏ඖࡉࢀゐ፹స⏝ࢆ♧ࡍࡇ࡜ࡀ☜ㄆ࡛ࡁࡓࠋࡇࡢᵝ࡞
0
1000
2000
3000
Zr(IV)࡟ࡼࡿゐ፹స⏝ࡢ኱ࡁࡉࡣࠊZr(IV)⁐ᾮࡢㄪ〇᪉
Time/secἲ࡟౫Ꮡࡍࡿࡇ࡜ࠊZrO2 ࡞࡝ࡢ㓟໬≀ᚤ⢏ᏊࢆඹᏑࡉ
ᅗ Zr(IV)ඹᏑୗ࡛ࡢ U(IV)ࡢ
ࡏࡓሙྜ࡟ࡣほ ࡉࢀ࡞࠸ࡇ࡜࡞࡝ࢆ᫂ࡽ࠿࡟ࡋࡓࠋ
㟁ゎ㑏ඖࡢ㟁ὶኚ໬ Zr ࡣ IV ౯ࡢᏳᐃᛶࡀ኱ࡁࡃࠊᮏᐇ㦂᮲௳ୗ࡛ࡣཎᏊ
⁐ᾮ: 1 mM U(VI), pH 3.0౯ኚ໬ࡀ࡞࠸࡜⪃࠼ࡽࢀࡿࠋࡇࡢࡓࡵࠊU(V)ࡢ⮬ゐ፹
E: -0.35 V vs SSE.
㑏ඖ࡟࠾࠸࡚ࠊU(IV)Ỉ㓟໬≀ࢥࣟ࢖ࢻ⮬㌟ࡣ㟁Ꮚᤵཷ࡟㛵୚ࡏࡎࠊ཯ᛂሙ࡜ࡋ࡚ゐ፹స⏝ࢆ୚࠼ࡿ࡜⪃࠼ࡽࢀࡿࠋ ᮏ◊✲ࡣ JSPS ⛉◊㈝ JP15H04247 ࡢຓᡂࢆཷࡅࡓࡶࡢ࡛ࡍࠋ

- 77 -

3%07

Determination of chemical composition of nickel-based super alloy by
TOF-PGA technique
JAEA㤳㒔኱Ꮫᮾி  ‫ۑ‬㯤 ᫂㍤ ࠊ⸨ ᬸ㍜ ࠊᾏ⪁ཎ඘ ࠊᮌᮧᩔ ࠊ୰ᮧペྖ 

䛆⥴ゝ䛇 Nickel-based super alloys are found in a wide range of applications, such as the manufactureof gas turbine, military aircraft, power generation and marine propulsion. These kinds of alloys
generally have complicated chemical compositions. In many studies, their compositions were
determined by X-ray fluorescence (XRF) method since the alloys were not destroyed before testing
their properties. However, XRF cannot detect the deep layer of alloys (typically under 0.1-mm depth).
Therefore, thick alloys are hardly examined directly by XRF. Prompt gamma-ray analysis (PGA) andneutron resonance capture analysis (NCRA) are well-known non-destructive methods which areapplicable to thick samples. Unfortunately, PGA is not very sensitive to some elements (e.g. Nb) and
NCRA lacks of sensitivity to some light elements. At J-PARC ANNRI, the two methods have beencombined as a new analytical method, TOF-PGA, which overcomes the disadvantages of PGA and
NCRA. It is feasible to apply the new method to the examinations on materials with complicatedchemical compositions. In this study, the compositions of two nickel-based alloys were quantitatively
analyzed by TOF-PGA technique.

4000

Alloy
Alloy-Ta-W-Co
Nb
Ta
W
Co

3000

Counts䛆ᐇ㦂䛇 5-g metal powder with the nominal content of eachelement in IN738LC alloy was first mixed by hand. Different
amounts of mixed powder were then compressed into discs formeasurement. Five TMS238-alloy samples were made in thesame way. Metal discs with single element were prepared as
reference samples. Each sample was irradiated for 0.5-6 h by the
25-Hz pulsed neutron beam which was generated by 200-kW
proton beam in J-PARC. All of them were measured in He gas atambient temperature. Prompt gamma-rays were detected by twocluster Ge detectors and eight coaxial Ge detectors.

2000

1000

䛆⤖ᯝ䛇 Concentrations of Ni, Cr, Ti, Co, Al, B in the alloy
0samples were determined by PGA while W, Ta, Mo, Nb, Re, Ru
1170
1180
1190
1200
TOF [Ps]
and Hf were quantitatively analyzed by TOF analysis or
TOF-PGA. Figure 1 shows the result of TOF analysist for one of Figure 1. Quantification for Nb
the elements, Nb. The contents of Co, W and Ta were first in 794.8-mg IN738LC alloy bydetermined by other gamma-ray or neutron resonance peaks. The TOF spectra. Reference samples
concentration of Nb was then deduced to be approximately are denoted by dash lines.
0.89±0.25% (nominal value: 0.90%) from the difference
spectrum (see red solid line in Figure 1). The accurate results of present study show that the TOF-PGA
technique is a powerful tool for the composition analysis on super alloys.
This work was supported in part by Grants-in-Aid for Scientific Research (25246038).
Determination of chemical composition of nickel-based super alloy by TOF-PGA technique
HUANG M., TOH Y., EBIHARA M., KIMURA A., NAKAMURA S.

- 78 -

- 79 -

ஏ୫ୱம᜴ᭉ ።  ጆῢໆΰ
3‫ܙ‬3୩ஙம୺உஞ୮஥୸ம୩ங஥ῴ6 ౕ༄ஏ୫ୱம୭୵୩ங஥ῴஏ୫ୱமౕ༄






P01

㇂ὠᖸ₲ᗏ㉁࡟࠾ࡅࡿ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾ⏤᮶ࡢᨺᑕᛶࢭࢩ࣒࢘ࡢືែ
ᮾ኱㝔⥲ྜ ‫ۑ‬ᒣᮏ㥴ࠊῧ┒᫭ஂࠊᑠ㇋ᕝ຾ぢࠊᯇᑿᇶஅ

䛆⥴ゝ䛇 2011 ᖺࡢ⚟ᓥ➨୍ཎⓎ஦ᨾ࡟ࡼࡾ⎔ቃ୰࡟ᣑᩓࡉࢀࡓᨺᑕᛶࢭࢩ࣒࢘ࡣࠊ㝣ୖᅵተ࡟ỿ╔ࡋࡓࡶࡢ࡟㛵ࡋ࡚ࡣࠊ⾲ᒙ 5 cm ࡟ 9 ๭௨ୖࡀ࡜࡝ࡲࡾୗᒙ࡬࡜ỿ㝆ࡋ࡞࠸ࡇ࡜ࡀሗ࿌ࡉ
ࢀ࡚࠸ࡿ[1]ࠋ୍᪉ࠊᾏᇦ࠾ࡼࡧἙᕝᇦ࡛ࡢᨺᑕᛶࢭࢩ࣒࢘ࡢᣲືࡣ㝣ୖ࡟ẚ㍑ࡋ࡚ᮍゎ᫂࡞㒊ศࡀṧࡾࠊ㞵Ỉࡢᙳ㡪࡛෌ࡧ⛣ືࡋἙᕝࢆ㏻ࡌἢᓊᇦ࡛ỿ㝆ࡍࡿ஧ḟᣑᩓࡸࠊᗏ㉁୰ࢆ 30
cm ࡯࡝ࡢ῝ࡉ࡬࡜ỿࢇ࡛ࡺࡃ⌧㇟[2]ࡀぢࡽࢀࡿࠋᮏ◊✲࡛ࡣࠊ༓ⴥ┴⩦ᚿ㔝ᕷ࡟఩⨨ࡍࡿࠊὶධἙᕝࢆᣢࡓ࡞࠸㇂ὠᖸ₲୰ࡢ 3 ᆅⅬ࠿ࡽᗏ㉁ࡢࢥ࢔ࢧࣥࣉࣜࣥࢢࢆ⾜࠸ࠊᨺᑕᛶࢭࢩ࢘
࣒ࡢ㖄┤࣭Ỉᖹศᕸࢆศᯒࡋࡓࠋࡲࡓࠊ㇂ὠᖸ₲ࡢᩘ࢟ࣟ༡ᮾ࡛ᮾி‴࡟ࡘ࡞ࡀࡿⰼぢᕝ࡜ࠊⰼぢᕝἈࡢᮾி‴࡛ࡢ㖄┤ศᕸࢹ࣮ࢱࡀࠊ᪤࡟ᙜ◊✲ᐊ࡛ㄪᰝࡉࢀ࡚࠾ࡾࠊࡑࢀ࡜ࡢẚ㍑⪃
ᐹࢆ⾜ࡗࡓࡇ࡜ࡶሗ࿌ࡍࡿࠋ
䛆ᐇ㦂䛇 ࢧࣥࣉࣜࣥࢢࡣ 2015 ᖺ 3 ᭶࡟ᖸ₲ᮾ㒊࡛⾲ᒙ 0 cm~5 cm ࡜ୗᒙ 25 cm~30 cm ࢆࠊ2015ᖺ 11 ᭶࡟ᖸ₲ᮾ㒊ࢆྵࡵࡓ 3 ᆅⅬࢆ㑅ࡧࠊ῝ࡉ 30 cm ࡲ࡛ᰕ≧᥇Ἶࢆ⾜ࡗࡓࠋ3 ᭶࡟᥇ྲྀࡋ
ࡓᗏ㉁ࡣࠊ⇕஝⇱ࡉࡏ U-8 ᐜჾ࡟ᑒධࡋࠊGe ༙ᑟయ᳨ฟჾ࡛ γ ⥺ࢫ࣌ࢡࢺࣝࢆ ᐃࡋࡓࠋ11᭶࡟᥇ྲྀࡋࡓᗏ㉁ࡣ 4 cm ࡈ࡜࡟ሁ✚᪉ྥ࡟ษ᩿ࡋࠊỈࢆຍ࠼࡚࣐ࣜࢿࣜᐜჾ࡟ᑒධࡋࠊᨺᑕ
ᛶࢭࢩ࣒࢘⃰ᗘࢆ ᐃࡋࡓࠋ࠸ࡎࢀࡢࢧࣥࣉࣝࡶྵỈ⋡ࢆ⪃៖ࡋࡓ⿵ṇࢆ࠿ࡅࠊࡲࡓ᥇ྲྀ᫬
Ⅼࡢᨺᑕᛶࢭࢩ࣒࢘⃰ᗘ࡬࡜༙ῶᮇ⿵ṇࢆ࠿ࡅࡓࠋ
䛆⤖ᯝ䛸⪃ᐹ䛇㻌 ㇂ὠᖸ₲ࡢ࠸ࡎࢀࡢᆅⅬ࡛ࡶ 134Cs ࡀ᳨ฟࡉࢀࠊᖸ₲ᮾ㒊࠿ࡽࡣ 25 cmࠥ30 cm
ࡢ῝ࡉ࡛ࡶ᳨ฟࡉࢀࡓࠋᨺᑕᛶࢭࢩ࣒࢘ࡣ 134Cs/137Cs ẚ࠿ࡽࠊ࡯ࡰ⚟ᓥ➨୍ཎⓎ஦ᨾ⏤᮶ࡢࡶࡢ࡛࠶ࡾࠊ㇂ὠᖸ₲࡛ࡶ 30 cm ࡯࡝ỿ㝆ࡋ࡚࠸ࡿࡇ࡜ࡀ᫂ࡽ࠿࡟࡞ࡗࡓࠋࡇࡢᖸ₲ᮾ㒊ࡣἾࡢὶฟࡀᖺࠎ㐍ࡳࠊሁ✚ཌࡀῶࡿᆅⅬ࡛࠶ࡿࡓࡵࠊࡑࡢ῝ࡉ࠿ࡽ᳨ฟࡉࢀࡿࡇ࡜ࡣࠊᨺᑕ
ᛶࢭࢩ࣒࢘ࡀᗏ㉁୰ࢆỿ㝆ࡋࡓ⤖ᯝ࡛࠶ࡿ࡜ゎ㔘࡛ࡁࡿࠋࡲࡓ 2015 ᖺ 3 ᭶࡜ 11 ᭶ࡢࢧࣥࣉ
ࣝࢆẚ㍑ࡍࡿ࡜⾲ᒙ࡛ 26.8 Bq/kg ࠿ࡽ 9.4 Bq/kg ࡬࡜ῶᑡࡋ࡚࠸ࡿ(Table)ࠋ
ୗᒙ࡛ࡣ 3 ᭶࡟ 13.7
Bq/kg ࢆ☜ㄆࡋࡓࡶࡢࡀࠊ11 ᭶࡟ࡣ 2.0 Bq/kg ࡲ࡛పୗࡋ࡚࠾ࡾࠊࡲࡓࡇࡢ῝ࡉ࡛ࡣ 134Cs ࡣ᳨ฟࡉࢀ࡞ࡃ࡞ࡗࡓࠋࡇࢀࡣ㇂ὠᖸ₲ࡀᮾி‴࡜஧ࡘࡢὶ㊰࡜⧅ࡀࡿࡢࡳ࡛ࠊἙᕝࡢᵝ࡟ᗈ࠸⠊ᅖࡢ㞟Ỉᇦࡀ࡞࠸ࡓࡵ࡟ࠊ௜㏆ࡢ㞵Ỉࡸᮾி‴࠿ࡽࡢᾏỈ࡟ྵࡲࢀࡿᨺᑕᛶࢭࢩ࣒࢘ࢆ
୍᪦⁀ࡵ㎸ࢇ࡛ࡶࠊࡍࡄ࡟‴࡬࡜ὶฟࡉࡏ࡚ࡋࡲ࠺ࡓࡵ࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ୍᪉ࠊ㇂ὠᖸ
₲ࡼࡾࡶᗈ࠸㞟Ỉᇦࢆᣢࡘⰼぢᕝ࡟࠾࠸࡚ࡣࠊἙཱྀ࠿ࡽ 4 km ௜㏆࡛ࡢ⾲ᒙࠊୗᒙ࡜ࡶ 200
Bq/kg ௨ୖࢆ᳨ฟࡋ࡚࠾ࡾࠊࡑࢀࡽࡣᮾி‴ࡢἙཱྀ௜㏆࡟㞟✚ࡋỿ㝆ࡋ࡚࠸ࡿࠋࡇࡢࡇ࡜࠿ࡽ
㇂ὠᖸ₲ࡢሁ✚ࡢ௙᪉ࡣࠊᨺᑕᛶࢭࢩ࣒࢘ࡢ௜╔ࡋࡓ⢏Ꮚࢆᗈ⠊ᅖ࠿ࡽᮾி‴࡟㐠ࡧ㎸ࡴἙᕝ⣔࡟ࡣぢࡽࢀ࡞࠸㛢㙐ᛶࡢᆅᇦ≉᭷ࡢࡶࡢ࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ        Table ྛᆅⅬࡢ 2015 ᖺ࡟࠾ࡅࡿᨺᑕᛶࢭࢩ࣒࢘ࡢྜィ್ (134Cs+137Cs)
῝ࡉ

ᆅⅬ᥇ྲྀ᫬ᮇ
ᖸ₲ᮾ㒊 (Bq/kg) ⰼぢᕝ(Bq/kg) ᮾி‴῝᥀(Bq/kg)
3᭶

11 ᭶

26.8

9.4



243



423

ୗᒙ 25 cm~30 cm 13.7

2.0



335



1191

⾲ᒙ 0 cm~5 cm

6᭶

8᭶

[1] ᒣཱྀ⣖Ꮚ et al. ㎰ᴗ⎔ቃᢏ⾡◊✲ᡤሗ࿌➨ 31 ྕ(2012)ࠊ[2] ῧ┒᫭ஂ et al. ศᯒ໬Ꮫ Vol.62 (2013)

Dynamics of radioactive cesium in sediments of Yatsu tideland from the Fukushima Daiichi nuclear
power plant accident
YAMAMOTO, S., SOEMORI, A., SHOZUGAWA, K., MATSUO, M.

- 81 -

P02ከᦶᕝ࡟࠾ࡅࡿᨺᑕᛶࢭࢩ࣒࢘ࡢ࢟ࣕࣛࢡࢱࣜࢮ࣮ࢩࣙࣥ
᫂኱㝔⌮ᕤ  ࠊ᫂኱◊✲࣭▱㈈ᡓ␎ᶵᵓ  ࠊ᫂኱⌮ᕤ  ‫ۑ‬ዟᮧ┿࿃  ࠊ㉺ᬛᗣኴ㑻  ࠊⴗཎ೺ኴ  ࠊ୰ᮧ฼ᘅ  ࠊᑠụ⿱ஓ 䛆⥴ ゝ 䛇 ᮾ ி 㟁 ຊ ⚟ ᓥ ➨ ୍ ཎ Ꮚ ຊ Ⓨ 㟁 ᡤ 䛾஦ ᨾ 䛻䜘䜚䚸⎔ ቃ ୰ 䛻ᨺ ᑕ ᛶ 䝉䝅䜴䝮 䠄 134 Cs,
137

Cs䠅䛜ᨺฟ䛥䜜䛯䚹஦ᨾ䜘䜚 5 ᖺ䜢⤒䛯⌧ᅾ䛷䜒㝣ᇦ䛻ỿ㝆䛧䛯ᨺᑕᛶ䝉䝅䜴䝮䛿Ἑᕝ 䜢⤒⏤䛧䚸ᾏὒ䜈䛸ὶฟ䛧䛶䛔䜛䛸⪃䛘䜙䜜䜛 1) 䚹Ỉ⎔ቃ୰䛾ᨺᑕᛶ䝉䝅䜴䝮䛾䝰䝙䝍䝸䞁䜾䛿ᘬ䛝⥆䛝㔜せ䛷䛒䜚䚸ྛᶵ㛵䛷ศᕸ䛾ᢕᥱ䛸୰㛗ᮇⓗ䛺ኚື䛾ㄪᰝ䛜⾜䜟䜜䛶䛔䜛䚹ᮏ◊✲䛷䛿䚸⎔ቃ┬䛾䝰䝙䝍䝸䞁䜾䛜⾜䜟䜜䛶䛚䜙䛪䚸ప⥺㔞ᆅᇦ䜢ὶ䜜䜛ከᦶᕝ䛻䛚䛔䛶ἙᕝỈ䛸ᗏ㉁䜢᥇ྲྀ䛧䚸ἙᕝỈ୰䛾⁐Ꮡែཬ䜃ᠱ⃮ែ 䛾ᨺᑕᛶ䝉䝅䜴䝮䛸ᗏ㉁୰ ᨺᑕᛶ䝉䝅䜴䝮䜢ᐃ㔞ศᯒ䛩䜛䛣䛸䛷䚸䛭䛾ᣲື䛻䛴䛔䛶ㄪᰝ䛧䛯䚹䛆ᐇ㦂䛇 ἙᕝỈヨᩱ䛿䚸⢏Ꮚಖᣢᚄ 1 μm 䛾ℐ⣬䛻䜘䜚྾ᘬℐ㐣䛧䚸ℐ⣬ୖ䛻ಖᣢ䛥䜜䛯ᠱ⃮≀୰䛾ᨺᑕᛶ䝉䝅䜴䝮䜢ᠱ⃮ែ䝉䝅䜴䝮䛸䛧䛯䚹ℐ⣬䜢㏻㐣䛧䛯ヨᩱ 䛿 12M HCl䠄600 mL䠅䜢ῧຍ䛧䚸pH 䜢 1.6 ௨ୗ䛻ㄪᩚ䛧䛯䚹䛭䛾ᚋ䚸12-䝰䝸䝤䝗䝸䞁㓟䜰䞁䝰䝙䜴䝮୕Ỉ࿴≀䠄AMP,⡿ᒣ⸆ရ䠅䜢 40 g ຍ䛘䚸⁐ᾮ䜢 1 ᫬㛫᧠ᢾ䛧䛯䚹⁐ᾮ䛿୍᫨ኪ㟼⨨䛧䚸⢏Ꮚಖᣢᚄ 4 μm
䛾ℐ⣬䛷䜝㐣䛧䚸AMP 䜢ℐ⣬ୖ䛻ᅇ཰䛧䛯䚹ᅇ཰䛧䛯 AMP 䛻྾╔䛥䜜䛯ᨺᑕᛶ䝉䝅䜴䝮䜢⁐Ꮡែ䝉䝅䜴䝮䛸䛧䛯䚹ᗏ㉁ヨᩱ䛿䚸105䉝䛻タᐃ䛧䛯஝⇱ᶵ䛷༑ศ䛻 24 ᫬㛫௨ୖ䚸䜅䜛䛔ศ䛡䛧䛶⢏ᚄ 2 mm ௨ୗ䛾䜒䛾䜢ᐃヨᩱ䛸䛧䛯䚹䛭䜜䛮䜜䛾ヨᩱ䛿䛽䛨ཱྀ U ᘧᐜჾ U-8

䛻඘ሸ䛧䚸㧗⣧ᗘ䝀䝹䝬䝙䜴䝮༙ᑟయ᳨ฟჾ䛷 γ ⥺ᐃ䛧䛯䚹䛆⤖ᯝཬ䜃⪃ᐹ䛇 㐣ཤ䛻ᐇ᪋䛧䛯◊✲⤖ᯝ䛸䛒䜟䛫䛶䚸2016 ᖺ 3 ᭶䜎䛷䛻 25 ᆅⅬ䛷ἙᕝỈཬ䜃ᗏ㉁䜢᥇ྲྀ䛧䚸Ἑᕝෆ䛷䛾Ꮡᅾ≧ែẖ䛻ᨺᑕᛶ䝉䝅䜴䝮䜢⥅⥆ⓗ䛻ᐃ㔞䛧䛶䛝䛯䚹ᗈᛶ 䝉䝅䜴䝮䛾ୗ ὶ 䜈䛾⛣ ⾜ ഴ ྥ 䛜☜ ㄆ 䛥䜜䛯䚹䜎䛯䚸ᐃⅬほ䛾⤖ᯝ 䛛䜙㝆Ỉ᫬䛻ᠱ⃮ែ䝉䝅䜴䝮⃰ᗘ䛜㧗䛟䛺䛳䛯䚹ᠱ⃮ែ䝉䝅䜴䝮⃰ᗘ䛿㝆㞵᫬䛻ቑ኱䛩䜛䛣䛸䛜ሗ࿌䛥䜜䛶䛔䜛 2) 䚹ἙᕝỈ୰䛻ྵ䜎䜜䜛ᠱ ⃮≀ ㉁ 㔞䛸ᠱ ⃮ែ䝉䝅䜴䝮⃰ ᗘ䛾㛵ಀ䜢 Fig. 1 䛻♧ 䛩䚹ᠱ⃮≀ ㉁㔞䛸ᠱ ⃮ ែ䝉䝅䜴䝮⃰ᗘ 䛻┦㛵䛜䜏䜙䜜䛯䛯䜑䚸㝆㞵䛻䜘䜛ᠱ⃮ែ䝉䝅䜴䝮⃰ᗘ䛾ୖ᪼䛿ᠱ⃮≀㉁䛾ᡂศ䛷䛿䛺䛟ᠱ⃮≀㉁㔞䛻౫Ꮡ䛩䜛䛸⪃䛘䜙䜜䜛䚹ከᦶ

Activity concentration / mBq L-1

ᇦ䝃䞁䝥䝸䞁䜾䛾⤖ᯝ䛛䜙䚸ከᦶᕝ䛻䛚䛡䜛ᨺᑕᕝ㞟Ỉᇦ䜢䝍䞊䝀䝑䝖䛻ᨺᑕᛶ䝉䝅䜴䝮䜢㛗ᮇⓗ䛻䝰䝙䝍䝸䞁䜾䛩䜛䛣䛸䛷䚸Ἑᕝ㞟Ỉᇦ䛻䛚䛡䜛ᨺᑕ ᛶ䝉䝅䜴䝮䛾⛣ ⾜ 䜔ኳ ೃ䛻䜘䜛ᙳ 㡪䜢ᢕ ᥱ 䛷

12
10
8
6

4
2
0

0.00 1.00 2.00 3.00 4.00 5.00
Content of suspended matter / g
Fig. 1 Relation between activity
concentration of suspend
radiocesium and suspended matter䛝䜛䛸⪃䛘䛶䛔䜛䚹䛆ཧ⪃ᩥ⊩䛇
1) ீᓥ༤ᙪ䜙: Adv. Sci. Tech. Soc., 19, 1, (2014).
2) Nagano, S., et al.: Biogeosciences, 10, 6215, (2013).

Characterization of radiocesiumu in Tamagawa river
OKUMURA, S., OCHI, K., HAGIWARA, K., NAKAMURA, T., KOIKE, Y.

- 82 -

y = 2.4161x - 0.502
r = 0.9033

P03

ᮾி‴࡟࠾ࡅࡿᾏὒᨺᑕ⬟ㄪᰝ̿ ᾏᗏᅵࠊᾏỈ୰ࡢࢭࢩ࣒࢘ ࠊ ⃰ᗘࡢ⤒ᖺኚ໬ ̿᪥ᮏศᯒࢭࣥࢱ࣮ ‫ۑ‬㇏ᒸៅ௓ࠊ᪂⏣῭ࠊ㔠Ꮚ೺ྖࠊᓊᮏṊኈࠊ☾㈅ၨ௓
࠙ࡣࡌࡵ࡟ࠚ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾ࡟ࡼࡿᨺᑕ⬟ởᰁࡢᐇែᢕᥱࢆ┠ⓗ࡜ࡋࡓࠊᅜࡢ⥲ྜࣔࢽࢱࣜࣥࢢィ⏬ࡢ୍⎔࡜ࡋ࡚ࠊἙᕝ࠿ࡽὶධࡍࡿᨺᑕᛶ≀㉁ࡢ⵳✚ࡀᠱᛕࡉࢀࡿᮾி‴ෆࡢ  ᆅ
Ⅼ࡟࠾࠸࡚ࠊᖹᡂ  ᖺ࠿ࡽᐃᮇⓗ࡟ᾏᗏᅵࠊᾏỈࡢᨺᑕ⬟ㄪᰝࢆᐇ᪋ࡋࡓࠋᾏᗏᅵཬࡧᾏỈࢆ᥇ྲྀࡋࠊᨺᑕᛶࢭࢩ࣒࢘ࢆᐃ㔞ࡋࡓࠋࡲࡓ  ᆅⅬ࡟࠾࠸࡚ᰕ≧᥇Ἶ࡟ࡼࡿ῝ᗘูศᕸㄪᰝࢆ⾜ࡗࡓࠋ࠙ㄪᰝ᪉ἲࠚᾏᗏᅵࡣࠊᾏᗏ⾲ᒙ࠿ࡽ῝ࡉ FP ࡲ࡛ࢆ᥇ྲྀࡋࡓࠋ῝ᗘูศᕸㄪᰝ࡛ࡣᾏᗏ⾲ᒙ࠿ࡽ FP ẖ࡟ FP ࡲ࡛ࢆ᥇ྲྀࡋࡓࠋ༑ศ࡟ΰྜࡋ྾ᘬࢁ㐣ࡋࡓࡶࡢࢆ Υ࡛⣙  ᪥㛫஝⇱ᚋࠊPP
Ꮝᚄࡢࡩࡿ࠸࡛ࡩࡿ࠸ศࡅࡋࠊ࣐ࣜࢿࣜᐜჾ ᐜ㔞 P/ ࡟ワࡵᐃヨᩱ࡜ࡋࡓࠋᾏỈࡣࠊ⾲ᒙ࠿ࡽ῝ࡉ P ࡲ࡛ࢆ᥇ྲྀࡋࠊሷ㓟ࢆῧຍࡋࡓࠋ/ ࢆศྲྀࡋ࡚ࢭࢩ࣒࢘ࢆࣜࣥࣔࣜࣈࢹࣥ㓟࢔ࣥࣔࢽ࣒࢘ $03 ࡟ࡼࡾᤕ㞟ࡋࠊ

ᐃᐜჾ 8 ࡟ワࡵ ᐃヨᩱ࡜ࡋࡓࠋࢤ࣐ࣝࢽ࣒༙࢘ᑟయ᳨ฟჾࢆ⏝࠸࡚  ⛊௨ୖ ᐃࡋࠊᨺᑕ⬟⃰ᗘࢆ⟬ฟࡋࡓࠋ
࠙⤖ᯝཬࡧ⪃ᐹࠚᖹᡂ 㹼 ᖺᗘ࡟࠾ࡅࡿྛ᥇
ྲྀᆅⅬࡢᾏᗏᅵࡢᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࡢᖺ㛫᭱㧗⃰ᗘࢆ༊ศࡅࡋࡓ⤖ᯝࢆᅗ  ࡟♧ࡍࠋ㧗࠸್ࢆ♧ࡍᆅⅬᩘࡣࡇࡢ  ᖺ㛫࡛ῶᑡࡋࡓࡀࠊⲨᕝ
࡜ᪧỤᡞᕝࡢἈ࡛࠶ࡿ .7 ࡜ᮌ᭦ὠ௜㏆ࡢ

&3 ࡀㄪᰝ㛤ጞ௨᮶ẚ㍑ⓗ㧗࠸್ࢆ♧ࡋ࡚࠸࠯঺ ᵐᵓ ࠰ࡇᴾ࠯঺ ᵐᵕ ࠰ࡇᴾ࠯঺ ᵐᵔ ࠰ࡇᴾᅗ  ᾏᗏᅵ୰ &V ࡢᖺ㛫᭱㧗⃰ᗘ್ࡢẚ㍑

ࡿࡇ࡜ࡀุࡗࡓࠋḟ࡟ࠊ῝ᗘูศᕸㄪᰝࢆ⾜ࡗࡓ  ᆅⅬ
.70&0&&3 ࡢᾏᗏᅵࡢᨺᑕᛶࢭ
ࢩ࣒࢘⃰ᗘࡢ⤒ᖺኚ໬ࢆᅗ  ࡟♧ࡍࠋᾏᗏ⾲ᒙࡢᨺᑕᛶࢭࢩ࣒࢘⃰ᗘ࡟ࡣ≀⌮ῶ⾶࡟క࠺ῶᑡഴྥࡀぢࡽࢀࡎྠ⛬ᗘ࡛᥎⛣ࡋ࡚࠸ࡿࠋࡇࡢ⌮⏤࡜ࡋ࡚Ἑᕝ࠿ࡽࡢ౪⤥ࡀ⥆࠸࡚ᾏᗏ ୰ᨺᑕ⃰ᗘ ⤒ᖺኚᅗ  ᾏᗏᅵ୰ᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࡢ⤒ᖺኚ໬࠸ࡿࡇ࡜ࡀ⪃࠼ࡽࢀࡓࠋᖹᡂ  ཬࡧ  ᖺᗘ࡟⾜ࡗࡓ῝ᗘูศᕸㄪᰝࡢ
⤖ᯝࢆᅗ  ࡟♧ࡍࠋᖹᡂ  ᖺᗘࡣㄪᰝ῝ᗘࢆ FP࠿ࡽ FP ࡟ᣑ኱ࡋࠊࡼࡾୗᒙࡢㄪᰝࢆ⾜ࡗࡓࠋ.7ࠊ0& ࡛ࡣ῝ᗘ FP ௜㏆ࢆቃ࡟ᨺᑕᛶࢭࢩ࢘
࣒⃰ᗘࡣῶᑡࡍࡿഴྥࡀ࠶ࡾࠊ&3 ࡛ࡣㄪᰝࢆ⾜ࡗࡓ῝ᗘ⠊ᅖ࡟࠾࠸࡚ᨺᑕᛶࢭࢩ࣒࢘⃰ᗘ࡟኱ࡁ࡞ኚືࡣぢࡽࢀ࡞࠸ࡀࠊ௚ࡢ  ᆅⅬ࡟ẚ࡭㧗࠸್ࢆ♧ࡋࡓࠋᅗ  ᾏᗏᅵ୰ &V ⃰ᗘࡢ῝ᗘศᕸ.7 ࡟࠾ࡅࡿᾏỈࡢᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࡢ⤒ᖺኚ໬ࢆᅗ  ࡟♧ࡍࠋᖹᡂ  ᖺᙜึࡢㄪᰝ⤖ᯝࢆ᭱㧗್࡜ࡋࠊࡑࡢᚋῶᑡഴྥࡀぢࡽࢀࡓࠋ
࡞࠾ࠊ᳨ฟࡉࢀࡓᨺᑕᛶࢭࢩ࣒࢘ࡣ &V&Vᅗ  ᾏỈ୰ᨺᑕᛶࢭࢩ࣒࢘⃰ᗘࡢ⤒ᖺኚ໬ᨺᑕ⬟ẚ࠿ࡽ஦ᨾ⏤᮶࡛࠶ࡿࡇ࡜ࢆ☜ㄆࡋࡓࠋᮏㄪᰝ⤖ᯝࡣཎᏊຊつไᗇࡢጤク஦ᴗࠕᮾி‴⎔ቃᨺᑕ⬟ㄪᰝ㸦ᖹᡂ  ᖺᗘ㸧ࠖࡢᡂᯝࡢ୍㒊࡛࠶ࡿࠋ
Radioactivity monitoring in the Tokyo Bay - temporal variations of 134Cs and 137Cs in sea sedimentand seawater
TOYOOKA, Shinsuke ; NITTA, Wataru ; KANEKO, Kenji ; KISHIMOTO, Takeshi ; ISOGAI, Keisuke ;- 83 -

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P04㉥ᇛ኱἟࿘㎶ᅵተࡢᨺᑕᛶࢭࢩ࣒࢘⃰ᗘศᕸ(ᮾி㒔ᕷ኱ᕤ ࠊ⩌㤿Ỉヨ ࠊᅜ⎔◊ ) ‫ۑ‬㛗ᶫᏕᑗ ࠊᯇᾆ἞᫂ ࠊ௒ᕝᓧ ࠊෆᒣᏕᩥ ࠊ㕥ᮌ✲┿ ࠊ‫‮‬ὸ⏤⨾ ࠊΏ㎶ᓧ ࠊ᪂஭⫕ ࠊ㔝ཎ⢭୍ ࠊᒸ⏣ Ꮚ )䛆⥴ゝ䛇
2011 ᖺ 3 ᭶ 11 ᪥ࡢᮾ᪥ᮏ኱㟈⅏࡟ࡼࡿ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾ࡟క࠸ࠊ኱㔞ࡢᨺᑕᛶ≀㉁ࡀᨺฟࡉࢀࡓࠋ㛢㙐ᛶࡢ㧗࠸†἟࡛࠶ࡿ㉥ᇛ኱἟࡛ࡣࠊ஦ᨾᚋ⏕ᜥࡍࡿ࣡࢝ࢧࢠ࠿ࡽᇶ‽್ࢆ㉸࠼ࡿ 137Cs ࡀ᳨ฟࡉࢀࡓࠋ⌧ᅾࡣᇶ‽್ࢆୗᅇࡗࡓࡀࠊ࣡࢝ࢧࢠࡢᨺᑕ⬟⃰ᗘࡢῶ⾶ࡀ㐜࠸ࡇ࡜ࡀၥ㢟࡜࡞ࡗ࡚࠸ࡿࠋࡑࡇ࡛㉥ᇛ኱἟ࡀ࢝ࣝࢹࣛ†࡛࠶ࡿࡇ࡜࡟╔┠ࡋࠊ㉥ᇛ኱἟
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㧗 1530m ࡢᆅⅬ࡟࡚ᡭືᘧ᥇ᅵჾ࡛㛗ࡉ 25cm ࢆ᥇ྲྀࡋࡓࠋࡑࡢ㝿ࠊࣜࢱ࣮࡜ᅵተࡣศࡅ࡚
᥇ྲྀࡋࡓࠋᗏ㉁ࡣ 2cm 㛫㝸㸦2014 ᖺࡣ 1cm㸧ࠊᅵተࡣ⾲ᒙ࠿ࡽ 5cm ࡲ࡛ 1cm ࡈ࡜ࠊࡑࢀ௨㝆ࡣ 2cm ࡈ࡜࡟࢝ࢵࢺࡋࡓࠋࡑࢀࡒࢀ஝⇱ࡉࡏࠊU-8 ᐜჾ࡟ධࢀࡓࡶࡢࢆศᯒヨᩱ࡜ࡋࠊ┦ᑐຠ⋡ 15.4%ࠊ್༙ᖜ 1.68keV ࡛࠶ࡿ㧗⣧ᗘ Ge ༙ᑟయ᳨ฟჾࢆ⏝࠸࡚ 86400 ⛊ ᐃࡋࡓࠋᚓࡽ
ࢀࡓȚ⥺ࢫ࣌ࢡࢺࣝ࠿ࡽ SEIKO EG㸤G ♫ࡢ࣐࢞ࣥࢫࢱࢪ࢜࡟ࡼࡗ࡚ゎᯒࢆ⾜ࡗࡓࠋ䛆⤖ᯝ䞉⪃ᐹ䛇 2014 ᖺ࡟᥇ྲྀࡋࡓ㉥ᇛ኱἟†ᚰ࡜ 2016 ᖺ࡟᥇ྲྀࡋࡓᆅⶶᓅࡢᅵተࡢᨺᑕ⬟⃰ᗘศᕸࢆࡑࢀࡒࢀᅗ 1ࠊᅗ 2 ࡟♧ࡋࡓࠋ†ᚰ࡛ࡣࠊ137Cs ࡣ⾲ᒙ࠿ࡽ 10cm ࡲ࡛ᛴ⃭࡟ 1/100 ࡲ࡛ῶᑡࡋ࡚࠸ࡿഴྥࡀぢࡽࢀࡓࠋࡲࡓ 134Cs ࡣ 9cm ࡲ࡛ࡋ࠿☜ㄆ࡛ࡁ࡞࠿ࡗࡓࠋᅗ 2࡛ࡣࠊ
15cm ࡲ࡛ᅗ 1 ࡟ఝࡓῶᑡഴྥࡀぢࡽࢀࡓࡀࠊ
4cm ࠿ࡽ 9cm ࡲ࡛ࡢᅵተ࡟ࡣᨺᑕᛶࢭࢩ࣒࢘ࢆࡏࡁ
Ṇࡵ࡚࠸ࡿഴྥࡀ࠶ࡗࡓࠋ༙ῶᮇ 2.1 ᖺ࡜▷࠸ 134Cs
ࡀᗏ㉁࣭᳃ᯘᅵተ࠿ࡽ⣙ 10cm ࡲ᳨࡛ฟࡉࢀ࡚࠸ ᅗ 1 2014 ᖺ†ᚰࡢᨺᑕ⬟⃰ᗘࡢ῝ᗘศᕸࡿࡇ࡜࠿ࡽࠊࡇࢀࡽࡢᨺᑕᛶࢭࢩ࣒࢘ࡣ⚟ᓥཎᏊຊⓎ㟁ᡤ⏤᮶ࡢࡶࡢ࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋᆅⶶᓅࡢᅵ
ተ࡟࠾࠸࡚ࡣࠊᅵተ࡟ࡼࡿࡏࡁṆࡵࡿຠᯝ࡛ࡣ࡞ࡃࠊ
᥇ྲྀᆅⅬࡀ⫼ࡢప࠸ⲡࡸᮌࡀ⏕࠼࡚࠸ࡓᆅⅬࡔࡗࡓࡓࡵ࡟ࠊᮌ࡟ࡼࡗ࡚ᨺᑕᛶࢭࢩ࣒࢘ࡢᾐ㏱ࢆ㜼ᐖࡋࡓྍ⬟ᛶࡀ⪃࠼ࡽࢀࡿࠋ
䛆ཧ⪃ᩥ⊩䛇
࣭௒ᕝᓧ㸦2015㸧ࠕ㉥ᇛ኱἟ᆅᗏ㉁ࡢሁ✚㏿ᗘ࠾ࡼࡧᨺᑕᛶࢭࢩ࣒࢘࡟㛵ࡍࡿ◊✲ࠖ

ᅗ 2 2016 ᖺᆅⶶᓅࡢᨺᑕ⬟⃰ᗘࡢ῝ᗘศᕸ

Distribution of radioactive cesium in the soil around Akagi Onuma region
NAGAHASHI,T.,MATSUURA,H.,IMAGAWA,S.,UCHIYAMA,T.,SUZUKI,K.,YUASA,Y.,WATANABE,S.,ARAI,H.,NOHARA,S.,OKADA,Y.

- 84 -

P05⚟ᓥཎⓎ஦ᨾ௨㝆ࡢἙᕝ࡟࠾ࡅࡿ⁐Ꮡែ࡜ᗏ㉁ᅵࡢࢭࢩ࣒࢘ྠ఩యẚኚ໬(⟃Ἴ኱㝔ᩘ⌮≀ 1ࠊ⟃Ἴ኱ᛂ⏝ຍ㏿ჾ 2ࠊཎᏊຊᶵᵓ 3ࠊ⟃Ἴ኱ᩘ⌮≀⣔ 4ࠊ
ᮾி኱ MALT5)○ᐩ⏣ᾴᖹ 1ࠊᯇ୰ဴஓ 2ࠊᮏከ┿⣖ 1ࠊబ⸨ᚿᙪ 3ࠊᯇᮧ୓ᑑ⨾ 2
㧗ᶫດ 2ࠊᆏཱྀ⥤ 4ࠊᯇᓮᾈஅ 5ࠊ➲බ࿴ 2, 4ࠊᮎᮌၨ௓ 4䛆⥴ゝ䛇 ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾ࡟ࡼࡾᣑᩓࡋࡓᨺᑕᛶ᰾✀ࡣ㝆㞵࡞࡝ࡢᙳ㡪ࢆཷࡅ࡚ᆅୖ࡟ỿ
╔ࡋࡓࠋཎⓎ࠿ࡽ 200 km 㞳ࢀࡓ༓ⴥ┴ᮾⴱᆅᇦࡢἙᕝᗏ㉁ᅵ࠿ࡽࡶཎⓎ⏤᮶ࡢᨺᑕᛶ᰾✀ࡀ᳨ฟࡉࢀ࡚࠾ࡾࠊᡃࠎࡣᆅⅬẖ࡟ἙᕝỈ⁐Ꮡែ୰ᨺᑕᛶࢭࢩ࣒࢘ 137Cs ࡸᨺᑕᛶࣚ࢘⣲ 129Iࠊ
ࡑࢀࡽࡢᏳᐃྠ఩య⃰ᗘࢆ ᐃࡋࡓࠋ≉࡟ࢭࢩ࣒࢘࡟㛵ࡋ࡚≉ᚩⓗ࡞ኚ໬ࡀほ ࡉࢀࡓࠋᮏ
ὶ࡜ẚ㍑ࡋ࡚ప࠸ࢭࢩ࣒࢘ྠ఩యẚ(137Cs / 133Cs)ࢆ♧ࡍ฼᰿ᕝἙᕝỈࡢὀỈ࡟ࡼࡗ࡚ᮏὶࡢ
⁐Ꮡែ୰ 137Cs / 133Cs ẚࡀ୍᫬ⓗ࡟኱ࡁࡃῶᑡࡋ࡚࠸ࡓࠋ୍᫬ⓗ࡟ῶᑡࡋࡓ 137Cs / 133Cs ẚࡣἙཱྀ࡟ྥࡅ࡚⛣ືࡋ࡚࠸ࡿ㛫࡟ᚎࠎ࡟ୖ᪼ࡍࡿኚ໬ࡀほ ࡉࢀࡓࠋࡇࡢ⁐Ꮡែ୰ 137Cs / 133Csẚࡢୖ᪼࡟ࡣᗏ㉁ᅵࡀ኱ࡁࡃᐤ୚ࡋ࡚࠸ࡿ࡜⪃࠼ࠊᗏ㉁ᅵ࠿ࡽ㏲ḟᢳฟ࡟ࡼࡾ Cs ࡢᢳฟࢆ⾜࠸ࠊྛࣇࣛࢡࢩࣙࣥࡢ 137Cs ࡜ 133Cs ࢆᐃ㔞ࡋࠊ⁐Ꮡែ࡜ࡢẚ㍑ࢆ⾜ࡗࡓࠋ䛆ᐇ㦂䛇 ༓ⴥ┴ᮾⴱᆅᇦࡢᡭ㈡἟࡟ὶධࡍࡿ኱ᇼᕝࡢୖὶ࠿ࡽୗὶ(⣙ 8 km)ࡢ඲ 6 ᆅⅬ࡜ὀỈ(฼᰿ᕝ)࠾ࡼࡧྜὶἙᕝ࡛࠶ࡿᆅ㔠ᇼ࡛᥇Ỉࡋࡓࠋᗏ㉁ᅵࡣὀỈ௨๓ 1 ᆅⅬ࡜ὀỈᚋ 3 ᆅⅬ࡛⾲ᒙ㒊ศࢆ᥇ྲྀࡋࡓࠋἙᕝỈヨᩱࡣ᥇ྲྀᚋ┤ࡕ࡟ 0.2 μm ࡢ࣓ࣥࣈࣞࣥࣇ࢕ࣝࢱ࣮ࢆ⏝࠸࡚ࢁ㐣ࡋࠊ⁐Ꮡែ࡜ᠱ⃮ែ࡟ศࡅࡓࠋᗏ㉁ᅵࡣࠊ㢼஝ࡉࡏࡓᚋ࡟㏲ḟᢳฟࢆ⾜ࡗࡓࠋ➨୍ࣇࣛࢡࢩࣙࣥ
ࡣỈ⁐ᛶࢭࢩ࣒࢘ࢆ㉸⣧Ỉ࡛ᢳฟࡋࠊ➨஧ࣇࣛࢡࢩࣙࣥࡣ 1 M 㓑㓟࢔ࣥࣔࢽ࣒࢘(pH=7.0)࡟
ࡼࡿ࢖࢜ࣥ஺᥮ᛶࢭࢩ࣒࢘ࡢᢳฟࢆ⾜ࡗࡓࠋ➨୕ࣇࣛࢡࢩࣙࣥࡣ 0.04 M ሷ㓟ࣄࢻࣟ࢟ࢩࣝ࢔
࣑ࣥ (25% v/v 㓑㓟) (pH=2.0)ࢆ⏝࠸ࡓ㑏ඖ⁐ゎ࡟ࡼࡗ࡚㕲-࣐ࣥ࢞ࣥ㓟໬≀࠿ࡽࢭࢩ࣒࢘ࢆᢳ
ฟࡋࠊ᭱ᚋࡢࣇࣛࢡࢩ࡛ࣙࣥࡣ 30w/t% H2O2 (pH=2.0)࡟ࡼࡿ᭷ᶵ≀࠿ࡽࡢᢳฟࢆ⾜ࡗࡓࠋ⁐Ꮡែ࠾ࡼࡧྛࣇࣛࢡࢩࣙࣥࡣㄏᑟ⤖ྜࣉࣛࢬ࣐㉁㔞ศᯒ⿦⨨(ICP-MS)࡜J⥺ࢫ࣌ࢡࢺ࣓ࣟࢺࣜ
࣮࡟ࡼࡾศᯒࡋࡓࠋ
䛆⤖ᯝ䞉᳨ウ䛇 ᗏ㉁ᅵ୰࡟ṧᏑࡋ࡚࠸ࡿỈ⁐ᛶ 137Cs ࡣᢳฟ๓ࡢᗏ㉁ᅵ࡟ᑐࡋ࡚ 0.3-0.4%ࡢᨺᑕ⬟㔞࡛࠶ࡗࡓࠋࡲࡓࠊ࢖࢜ࣥ஺᥮ᛶࠊ㕲̺࣐ࣥ࢞ࣥ㓟໬≀୰ࡢ 137Cs ࡣࡑࢀࡒࢀ 13-14%ࠊ4-6%࡛࠶ࡗࡓࠋ
➨஧ࠊ➨୕ࣇࣛࢡࢩࣙࣥࡣୖὶഃ࠿ࡽࡑࢀࡒࢀ 1.6-1.810-4(ὀỈ๓)ࠊ2.5-2.810-4(ὀỈᚋ)ࠊ
3.7-4.810-4(ὀỈᚋ)࡜ྠ୍ᆅⅬ࡛ࡣ㏆࠸ 137Cs / 133Cs ẚࢆ♧ࡋࠊἙཱྀ࡟㏆࡙ࡃ࡟ࡘࢀ࡚ୖ᪼ࡍࡿഴྥࡀぢࡽࢀࡓࠋᑐᛂࡍࡿ⁐Ꮡែࡢ 137Cs / 133Cs ẚ࡛ࡣୖὶഃ࠿ࡽ 2.510-7(ὀỈ๓)ࠊ1.2
10-7(ὀỈᚋ)ࠊ1.710-7(ὀỈᚋ)࡜ὀỈ࡟ࡼࡿ 137Cs / 133Cs ẚࡢῶᑡ࡜ࡑࡢᚋࡢቑຍࡀぢࡽࢀࡿࠋὀỈ௨㝆࡛ࡣ(⁐Ꮡែ 137Cs / 133Cs ẚ) / (ᗏ㉁ᅵ 137Cs / 133Cs ẚ)ࡣ 4.4-5.010-4 ࡜࡯ࡰ୍ᐃࡢ್ࢆ
♧ࡋࠊ㏿࠸㏿ᗘ࡛ᗏ㉁ᅵ࡜⁐Ꮡែ࡜ࡢᖹ⾮࡟㐩ࡍࡿࡇ࡜ࡀ♧၀ࡉࢀࡓࠋᗏ㉁ᅵ୰ࣚ࢘⣲࡟ᑐࡍࡿศᯒࢆ௒ᚋ⾜࠸ࠊ᰾✀࡟ࡼࡿᕪ␗ࢆ᳨ウࡍࡿணᐃ࡛࠶ࡿࠋ

Cesium isotopic ratio variation about cesium dissolved in river water and included bottom
sediment after the FDNPP accident
Ryohei Tomita, Tetsuya Matsunaka, Maki Honda, Yukihiko Satou,
Masumi Matsumura, Tsutomu Takahashi, Aya Sakaguchi4, Hiroyuki Matsuzaki,
Kimikazu Sasa, Keisuke Sueki- 85 -

䢢

P06࢖ࢿ୰ࡢᚤ㔞ඖ⣲ཬࡧᨺᑕᛶࢭࢩ࣒࢘ࡢศᯒ
㟼ᒸ኱⌮ ࠊᚨᓥ኱ ARREMC 2ࠊᮾி኱ RIC3ࠊ࢖ࣥࢢ 4ࠊྡྂᒇ኱ྡ㄃ᩍᤵ 5ࠊ
RI ༠఍⁪ἑ◊ 6ࠊᒾᡭ་኱ࢧ࢖ࢡࣟ 7) ‫▮ۑ‬Ọㄔே 1ࠊ୕ዲᘯ୍ 2ࠊᱠᇉṇ࿃ 3ࠊ
᳃ ୍ᖾ 4ࠊす⃝㑥⚽ 5ࠊᚋ⸨⚈Ꮚ 6ࠊୡⰋ⪔୍㑻 7䛆⥴ゝ䛇 2011 ᖺ 3 ᭶࡟Ⓨ⏕ࡋࡓᮾி㟁ຊ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾ௨㝆ࠊᅵተ࠿ࡽ㎰స≀࡬ࡢᨺᑕᛶࢭࢩ࣒࢘ࡢ⛣⾜ࡀᠱᛕࡉࢀ࡚࠸ࡿࠋᅵተ࠿ࡽస≀࡬ࡢᨺᑕᛶ≀㉁ࡢ྾཰ࡉࢀࡸࡍࡉࡣࠊ
ᅵተࡢᅵ㉁ࠊ⏝Ỉཬࡧ⫧ᩱ୰࡟ྵࡲࢀࡿ୺せඖ⣲ཬࡧᚤ㔞ඖ⣲ࡢᙳ㡪ࢆཷࡅࡿࡇ࡜ࡀ⪃࠼ࡽࢀࡿࠋࡑࡇ࡛ᮏ◊✲࡛ࡣࠊ⚟ᓥᕷෆࡢᒣ㛫㒊ࡢỈ⏣Ỉཬࡧ⏝Ỉࡢࢧࣥࣉࣜࣥࢢࢆ⥅⥆ⓗ࡟⾜࠸ࠊྵࡲࢀࡿ୺せඖ⣲ࡸᚤ㔞ඖ⣲⃰ᗘࡢᐃ㔞ࢆ⾜࠺࡜࡜ࡶ࡟ࠊฟ✑ᚋࡢⴥ࡟ྵࡲࢀࡿඖ⣲ࡢᐃ㔞ࢆ⾜ࡗࡓࠋࡲࡓࠊูࡢᆅᇦ࠿ࡽ᥇ྲྀࡋࡓࢮ࢜ࣛ࢖ࢺฎ⌮ࢆࡉࢀ࡚࠸࡞࠸⏣ࡢᅵተࢆ⏝࠸࡚ࠊ࠸ࡃࡘ࠿ࡢ᮲௳࡛ᐇ㦂ᐊෆ࡛ࡢ࢖ࢿ᱂ᇵࢆ⾜࠸ࠊẚ㍑᳨ウࡋࡓࠋ䛆ᐇ㦂䛇 (1) ࢧࣥࣉࣜࣥࢢ 2014 ᖺ 5 ᭶㹼10 ᭶ཬࡧ 2015 ᖺ 5 ᭶㹼㸶᭶࡟࠿ࡅ࡚ࠊ⚟ᓥᕷෆᒣ㛫㒊ࡢ⏣ࡢ⏝Ỉ㸦ࡓࡵụỈཬࡧἑỈ㸧୪ࡧ࡟⏣Ỉࢆ᥇ྲྀࡋࠊ(1:1)◪㓟ࢆຍ࠼࡚ pH 2 ⛬ᗘ࡟࡞ࡿࡼ࠺࡟ࡋࠊศᯒ࡟౪ࡍࡿࡲ࡛ಖᏑࡋࡓࠋࡲࡓࠊ8 ᭶ୗ᪪ࡢฟ✑ᚋࡢ࢖ࢿࢆ᥇ྲྀࡋࡓࠋ
(2) ᐇ㦂ᐊෆ࡟࠾ࡅࡿ࢖ࢿ᱂ᇵ 2015 ᖺ 5 ᭶࡟⚟ᓥᕷෆࡢࢮ࢜ࣛ࢖ࢺฎ⌮ࢆࡋ࡚࠸࡞࠸⏣ࡢᅵተࢆ᥇ྲྀࡋࠊᐇ㦂ᐊෆ࡟࠾࠸࡚࢖ࢿࡢ࣏ࢵࢺ᱂ᇵࢆ⾜ࡗࡓࠋ࣏ࢵࢺᩘࡣ 10 ࡜ࡋࠊ4 ࣏ࢵࢺࡣ↓ฎ⌮ࡢᅵተࠊ㸱࣏ࢵࢺࡣࢮ࢜ࣛ࢖ࢺࢆῧຍࡋࡓᅵተࠊṧࡾ㸱࣏ࢵࢺࡣ↓ฎ⌮ࡢᅵተ࡟ⱑ
ࢆ᳜࠼௜ࡅ࡚࠿ࡽ 4 㐌㛫ᚋ࡟ሷ໬ࣝࣅࢪ࣒࢘ཬࡧሷ໬ࢭࢩ࣒࢘ࢆࠊࡑࢀࡒࢀ 4.28×10-3 mol ῧຍࡋࡓ᮲௳࡛᱂ᇵࡋࡓࠋ
(3) PIXE ศᯒ ỈヨᩱࡣࠊヨᩱỈ 1 mL ࡟ In ෆ㒊ᶆ‽⁐ᾮࢆຍ࠼ࠊࣉࣟࣞࣥ⭷ୖ࡟⁲ୗ࣭஝⇱ࡋࡓࡶࡢࢆศᯒ࡟౪ࡋࡓࠋ࢖ࢿ࡟ࡘ࠸࡚ࡣࠊ஝⇱ᚋ࡟ᩘ༑ mg ࢆ⢭⛗ࡋࠊIn ෆ㒊ᶆ‽⁐ᾮࢆຍ࠼࡚◪㓟⅊໬ࡋࡓࡶࡢࢆࣂࢵ࢟ࣥࢢࣇ࢕࣒ࣝ࡟⁲ୗ࣭஝⇱ࡋࠊࢱ࣮ࢤࢵࢺ࡜ࡋࡓࠋศᯒ
ࡣࠊ(බ♫)᪥ᮏ࢔࢖ࢯࢺ࣮ࣉ༠఍ோ⛉グᛕࢧ࢖ࢡࣟࢺࣟࣥࢭࣥࢱ࣮(NMCC)࡟࠾࠸࡚ᐇ᪋ࡋࡓࠋ
䛆⤖ᯝ䛸⪃ᐹ䛇 ྑᅗࡣᐊෆ᱂ᇵࢆ⾜ࡗࡓ࢖ࢿࡢ࠺ࡕࠊⱑ᳜࠼௜ࡅ 4 㐌㛫ᚋ࡟ Rb ཬࡧ Cs ࢆῧຍࡋࡓࡶࡢࡢ࠺ࡕࡢྠ୍ࡢⱼࡢⴥ࡟ࡘ࠸࡚ࡢศᯒ⤖ᯝࡢ୍㒊ࢆ♧ࡋࡓࡶࡢ࡛࠶ࡿࠋྠࣔࣝࡢ
Rb ཬࡧ Cs ࢆῧຍࡋࡓࡀࠊⴥ࡟྾཰ࡉࢀࡓ㔞ࡣ mol ẚ࡛ Rb/Cs=8㹼9 ࡛࠶ࡾ㸪Rb ࡢ᪉ࡀ྾ࡇ࡜ࢆ♧ࡋ࡚࠸ࡓࠋ୍᪉ࠊྛ࣏ࢵࢺ࠿ࡽ᥇ྲྀࡋࡓ
ࢥ࣓㸦⢄㸧࡟ࡘ࠸࡚ࡢ⛣⾜ಀᩘࢆồࡵࡿ࡜ࠊ↓ฎ⌮ࡲࡓࡣࢮ࢜ࣛ࢖ࢺࢆῧຍࡋࡓᅵተ࡛᱂ᇵࡋࡓࡶ
ࡢࡣ 0.0008㹼0.0023 ࡛࠶ࡗࡓࡢ࡟ᑐࡋࠊCs㸦ཬࡧ Rb㸧ࢆῧຍࡋࡓሙྜ࡟ࡣ 0.0065㹼0.014 ࡜኱ᖜ࡞ቑຍࡀぢࡽࢀࡓࠋࡇࡢࡇ࡜ࡣࠊῧຍࡋࡓ Cs
ࡢᏳᐃྠ఩యࡣࠊᅵተ࡟྾╔ࡍࡿ୍᪉࡛ࠊᩘᖺ
࡟ࢃࡓࡗ࡚ᅵተ࡟྾╔ࡋ࡚࠸ࡓᨺᑕᛶࢭࢩ࣒࢘ࢆ
㐟㞳ࡉࡏࡿࡇ࡜ࢆ♧ࡋ࡚࠸ࡿࠋ

㻝㻡㻜㻜㻾㼎㻌ཬ䜃㻌㻯㼟⃰ᗘ㻌㻛㻌㻔P㼓㻌㼓㻙㻝㻕཰ࡉࢀࡸࡍ࠸࠿ࠊࡲࡓࡣ Cs ࡀᅵተ࡟྾╔ࡉࢀࡿ

㻌㻾㼎
㻌㻯㼟
㻝㻜㻜㻜

㻡㻜㻜

㻜

㻝ᯛ┠

㻞ᯛ┠

㻟ᯛ┠

㻠ᯛ┠

ᅗ
 Rb ཬࡧ Cs ࢆῧຍࡋ࡚᱂ᇵࡋࡓ࢖ࢿࡢⴥ୰  ࡢ Rb ཬࡧ Cs ⃰ᗘ㸦ⴥࡣ✄✑࠿ࡽࡢᯛᩘ㸧

Analysis of Trace Elements and Radioactive Cesium in Rice Plants
YANAGA, M., MIYOSHI, H., HIGAKI, S., MORI, K., NISHIZAWA, K., GOTO, S., SERA, K.

- 86 -

P07⚟ᓥཎⓎ஦ᨾ࡟⏤᮶ࡍࡿᨺᑕᛶࢭࢩ࣒࢘ࢆྵࡴ୙⁐ᛶ⢏Ꮚࡢ⏕ᡂᶍᨃᐇ㦂㸦㜰኱㝔⌮ 1ࠊ㜰኱ RI ࢭ 2㸧‫⏣⸨ۑ‬ᑗྐ 1ࠊ஧ᐑ࿴ᙪ 1ࠊྜྷᮧᓫ 2ࠊ⠛ཎཌ 1ࡣࡌࡵ࡟㸸⚟ᓥཎᏊຊⓎ㟁ᡤࡢ஦ᨾ࡟ࡼࡾ⎔ቃ୰࡟ከࡃࡢᨺᑕᛶඖ⣲ࡀᨺฟࡉࢀࡓࠋࡇࢀࡽࡢ୰
࡛ࠊỈࡸ㓟࡟୙⁐࡞ᨺᑕᛶࢭࢩ࣒࢘ࢆྵࡴ⢏Ꮚ(௨ୗࢭࢩ࣒࣮࢘࣎ࣝ)ࡀぢࡘ࠿ࡗ࡚࠸ࡿ[1]ࠋࢭࢩ
࣒࣮࢘࣎ࣝࡣ⢏ᚄࡀᩘ μm ࡢ⌫య࡛ࠊ୺ᡂศࡢ SiO2 ࡢ௚࡟ Cs ࡸ ZnࠊFe ࡜࠸ࡗࡓ㔠ᒓඖ⣲ࢆྵࢇ࡛࠸ࡿ[2,3]ࠋࡲࡓỈࡸ㓟࡟ᑐࡋ࡚୙⁐ᛶ࡛࠶ࡿࡇ࡜ࡶሗ࿌ࡉࢀ࡚࠸ࡿࡀࠊࡇࡢࡼ࠺࡞⢏Ꮚࡢ⏕ᡂ㐣⛬ࡣ᫂ࡽ࠿࡟࡞ࡗ࡚࠸࡞࠸ࠋࢭࢩ࣒࣮࢘࣎ࣝࡢ⏕ᡂ㐣⛬ࢆ᫂ࡽ࠿࡟ࡍࡿࡇ࡜ࡣࠊ஦ᨾ᫬ࡢ⅔
ෆ⎔ቃࢆ᫂ࡽ࠿࡟ࡍࡿୖ࡛㔜せ࡛࠶ࡿࠋᮏ◊✲࡛ࡣࠊ⇞ᩱ࠿ࡽ᥹Ⓨࡋࡓ CsOH ࡜᩿⇕ᮦ➼࡟ྵ
ࡲࢀࡿ SiO2 ࡜ࡢ཯ᛂ≀ࡀࠊ✵Ẽ୰࡛ᛴ෭ࡉࢀ⌫య࡜࡞ࡗ࡚ᨺฟࡉࢀࡓ࡜࠸࠺⏕ᡂ㐣⛬ࡢ௬ㄝࢆ❧࡚ࠊࡇࢀ࡟ᇶ࡙࠸࡚ᶍᨃ⢏Ꮚࡢ⏕ᡂࢆ⾜ࡗࡓࠋࡲࡓࠊFe ࡸ Zn ࡜࠸ࡗࡓ㔠ᒓࢆྵࢇࡔᶍᨃ⢏Ꮚࡢ⏕ᡂ[4]࡜ࠊᶍᨃ⢏ᏊࡢỈࡸ㓟࡬ࡢ୙⁐ᛶ࡟ࡘ࠸࡚ㄪ࡭ࡓࡢ࡛ሗ࿌ࡍࡿࠋ
ᐇ㦂㸸ࢽࢵࢣࣝࡿࡘࡰ࡟ CsOH0.50 g ࢆධࢀࠊ㟁Ẽ⅔࡟࡚ 300㹼500 Υ࡛ຍ⇕ࡍࡿࡇ࡜࡛⁐⼥ࡋࡓࠋࡇࡇ࡟ࢢࣛࢫ࣮࢘ࣝ 0.05 g ࢆධࢀ Cs ࡜ SiO2 ࡢΰྜ≀ࢆసᡂࡋࠊࡇࡢᾮ≧ࡢΰྜ≀࡟ࢫ࣏࢖ࢺ࡛Ỉࢆ⁲ୗࡍࡿࡇ࡜࡟ࡼࡗ࡚✺Ἓࢆ㉳ࡇࡋࠊ✵Ẽ୰࡟㣕ᩓࡉࡏ࡚ỿ╔ࡉࡏࡓࠋ㔠ᒓඖ⣲ࢆྵࡲࡏࡿࡓࡵࡢᐇ㦂࡛ࡣࠊ2 mm ᅄ᪉࡟ษࡗࡓࢺࢱࣥᯈ 1.50 g ࢆ⁐ゎࡋࡓ CsOH ࡟ᢞධࡋࠊྠᵝ
ࡢᐇ㦂ࢆ⾜ࡗࡓࠋỿ╔≀ࢆ࣮࢝࣎ࣥࢸ࣮ࣉ࡟㈞ࡾ௜ࡅࠊࢸ࣮ࣉࡈ࡜⁐ᾮ࡟ࡉࡽࡋࡓࠋࢸ࣮ࣉୖࡢ
ṧ␃≀࡟ࡘ࠸࡚ SEM ࠾ࡼࡧ EDX ࡟ࡼࡿほᐹࢆ⾜ࡗࡓࠋ⤖ᯝ࡜⪃ᐹ㸸Ỉ࡟ࡉࡽࡋࡓᚋࡢࢸ࣮ࣉୖ࡟Ꮡᅾࡋ࡚࠸ࡓ≀㉁ࡢ SEM ീ࡜ EDX ࡟ࡼࡿඖ⣲ศᯒࢫ࣌ࢡࢺࣝࢆᅗ 1 ࠾ࡼࡧ 2 ࡟♧ࡍࠋᅗ 1 ࡟♧ࡍࡼ࠺࡟ࠊ⢏ᚄࡀ 3 μm ⛬ᗘࡢ⌫ᙧࡢᶍᨃ⢏Ꮚࢆ⏕ᡂࡍࡿࡇ࡜ࡀ࡛ࡁࡓࠋࡲࡓᅗ 2 ࡟♧ࡋࡓඖ⣲ศᯒ⤖ᯝ࠿ࡽࠊ୺ᡂศ࡜⪃࠼ࡽࢀࡿ SiO2 ࡢ௚࡟ࠊFe ࡜ ZnࠊCs ࢆྵࢇ࡛࠾ࡾࠊᐇ㝿ࡢࢭࢩ࣒࣮࢘࣎ࣝྠᵝࠊ⏕ᡂࡋࡓᶍᨃ⢏ᏊࡀỈ࡟ᑐࡋ࡚୙⁐࡛࠶ࡿࡇ࡜ࡀࢃ࠿ࡗࡓࠋࡲࡓࠊᮏ◊✲࡛ࡣ 137Cs ࢆ⏝࠸࡚ᶍᨃ⢏Ꮚࡢ⏕ᡂࡶ⾜࠸ࠊࢁ⣬࡞࡝࡟ỿ

Intensity/ log╔ࡉࡏࡓᚋࠊIP ➼ࢆ⏝࠸࡚ほᐹࢆ⾜ࡗࡓࠋヲ⣽ࡣㅮ₇࡛Ⓨ⾲ࡍࡿࠋᅗ 1. Ỉ࡟ࡉࡽࡋࡓᚋࡢ C ࢸ࣮ࣉ

10000

O

Si
Cs

1000
100
10

Fe

Zn

Na

1

Energy/gy keVᅗ 2. ᅗ 1 ࡢᶍᨃ⢏Ꮚࡢඖ⣲ศᯒࢫ࣌ࢡࢺࣝୖ࡟ぢࡽࢀࡓᶍᨃ⢏Ꮚཧ⪃ᩥ⊩[1] K. Adachi et al., Sci. Rep. 2013, 3, 2554
[2] Y. Abe et al., Anal. Chem. 2014, 86, 8521−8525[3] N. Yamaguchi et al., Sci. Rep. 2016, 6, 20548[4] T. Yoshimura, Proceedings of the 16th Workshop on Environmental Radioactivity, March9 - 11, 2015

Production experiments of the insoluble Cs-concentrated particles released by the FDNPP
accident
FUJITA, N., NINOMIYA, K., YOSHIMURA, T., SHINOHARA, A.

- 87 -

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*ÉnćÈU' 134Cs p) 137Cs Ç(22ß¾

100

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water-repellent
treatment 
Fig. 1 Results of elution test for municipal
waste incinerator fly ash.
: 137Cs, : 134Cs.
No treatment"!°$1Æe¢g±21




1)

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Iwahana, Y. et al., J. Mater. Cycles Waste Manag. 2015, DOI 10.1007/s10163-015-0408-5.

3) Â¨t/, X ãf³'ú¼, 47, 225-232 (2016).
Suppression of radiocesium elution by water-repellent treatment of municipal waste incinerator fly ash
FUKUDA, D., IWAHANA, Y., KUME, T., FUJII, K., HAGIWARA, K., OBUCHI, A., KOIKE, Y.

- 88 -



P09⮬ືศᯒ⿦⨨࡟ࡼࡿ㣗ရヨᩱ୰ࡢࢫࢺࣟࣥࢳ࣒࢘ ศᯒ
᪥ᮏศᯒࢭࣥࢱ࣮ࠊᰘᓮ〇సᡤ  ‫ۑ‬కሙ ⁠ ࠊᯇỤⓏஂ ࠊ⸨᳃ ᠇ ࠊ℩ᡞ༤ᩥ ࠊඣ⋢⌮᝴ ࠊ᳃ᮏ㝯ኵ ࠊᰘᓮᫀᙪ ࠙ࡣࡌࡵ࡟ࠚ
ᮾ᪥ᮏ኱㟈⅏࡟క࠺ᮾி㟁ຊ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾ௨㝆ࠊ㣗ရ࡟ྵࡲࢀࡿࢫࢺࣟࣥࢳ࢘
࣒ 90 ࡸࣉࣝࢺࢽ࣒࢘࡞࡝࡬ࡢ㛵ᚰࡀ㧗ࡲࡗ࡚࠸ࡿࠋࡇࢀࡽࡢ᰾✀ࡢศᯒࡣᨺᑕ໬Ꮫศᯒࢆక
࠺ࡓࡵࠊ⤖ᯝࢆᚓࡿࡲ࡛࡟᫬㛫ࢆせࡋࠊከࡃࡢヨᩱࢆศᯒࡍࡿࡇ࡜ࡀ㞴ࡋ࠸ࡢࡀ⌧≧࡛࠶ࡿࠋ
ࡑࡇ࡛ࠊ(බ㈈)᪥ᮏศᯒࢭࣥࢱ࣮࡜ᰴᘧ఍♫ᰘᓮ〇సᡤࡣࠊ⛉Ꮫᢏ⾡᣺⯆ᶵᵓࡢ◊✲ᡂᯝᒎ㛤஦ᴗࠕඛ➃ィ ศᯒᢏ⾡࣭ᶵჾ㛤Ⓨࣉࣟࢢ࣒ࣛ 㔜Ⅼ㛤Ⓨ㡿ᇦࠖࢆཷࡅࠊ㣗ရ୰ࡢ࢔ࣝࣇ࢓࣭
࣮࣋ࢱ⥺ᨺฟ᰾✀ࡢศ㞳࡜ᨺᑕ⬟ ᐃࢆ⮬ື໬ࡋࠊᑓ⏝᪋タࢆᚲせ࡜ࡏࡎࠊᏳ඲࣭㎿㏿࡞ᐃࢆྍ⬟࡜ࡍࡿ⮬ືศᯒ⿦⨨ࢆ㛤Ⓨࡋࡓࠋᮏ◊✲࡛ࡣࠊ⮬ືศᯒ⿦⨨ࡢ✀ࠎࡢ㣗ရヨᩱ࡬ࡢ㐺⏝ᛶࢆ☜ㄆࡍࡿ࡜࡜ࡶ࡟ࠊࡑࡢጇᙜᛶࢆ☜ㄆࡍࡿࡓࡵࡢ᳨ウࢆ⾜ࡗࡓࠋ࠙ᐇ㦂᪉ἲࠚ᳨ウࡋࡓ⮬ືศᯒ⿦⨨(ᖜ
250cmዟ⾜ 85cm㧗ࡉ
180cm)ࡢᴫ␎ࢆᅗ࡟♧ࡍࠋྠ⿦⨨ࡣヨᩱศゎ㒊ࠊ໬Ꮫศ㞳࣭⢭〇㒊ࠊ ᐃࡢࡓࡵࡢヨᩱㄪ〇㒊ཬࡧᐃ㒊࠿ࡽᵓᡂࡉࢀࠊ⎔ቃᨺᑕ⥺ࣔࢽࢱࣜࣥࢢ࡛౑
⏝ࡉࢀ࡚࠸ࡿᩥ㒊⛉Ꮫ┬ᨺᑕ⬟ ᐃἲࢩ࣮ࣜࢬ࡟
‽ࡎࡿศᯒἲࢆ᥇⏝ࡋࡘᅗ ⮬ືศᯒ⿦⨨ࡢᴫ␎
ࡘࠊ24 ᫬㛫⛬ᗘ࡛ࢫࢺࣟ
ࣥࢳ࣒࢘ࡢศ㞳⢭〇ࡀ᏶஢ࡍࡿࡼ࠺࡟タィ࣭〇సࡉࢀ࡚࠸ࡿࠋ✀ࠎࡢ㣗ရヨᩱ࡛ࡢ᳨ウ࡛ࡣศᯒ౪ヨ㔞ࡣཎ๎࡜ࡋ࡚⏕ 1kg ┦ᙜࡢ⅊࡜ࡋࠊ⮬ືศᯒ⿦⨨࡟ࡼࡾศ㞳⢭〇ࢆ⾜࠸ࠊࢫࢺࣟ
ࣥࢳ࣒࢘ࡢᅇ཰⋡ࢆ᳨ウࡋࡓࠋ࠙⤖ᯝ࡜⪃ᐹࠚ
50 ヨᩱ⛬ᗘࡢ㣗ရヨᩱࢆ⮬ືศᯒ⿦⨨࡟ࡼࡾศᯒࡋࡓ࡜ࡇࢁࠊࢫࢺࣟࣥࢳ࣒࢘ࡢᅇ཰⋡ࡣᴫ
ࡡ 60%௨ୖࠊᡤせ᫬㛫ࡣᴫࡡ 24 ᫬㛫࡛࠶ࡾࠊ࠸ࡎࢀࡶⰋዲ࡞⤖ᯝ࡛࠶ࡗࡓࠋ୍㒊ࡢヨᩱ࡛ࢁ㐣࡟᫬㛫ࡀ࠿࠿ࡿ࡞࡝ࡢ୙ලྜࡀᩓぢࡉࢀࡓࡶࡢࡢࠊ⿦⨨ཬࡧไᚚࢩࢫࢸ࣒ࡢᨵⰋ࡟ࡼࡾࠊ
ࡑࢀࡽࡢ୙ලྜⅬࢆゎᾘࡍࡿࡇ࡜ࡀ࡛ࡁࡓࠋࡲࡓࠊ᪥ᮏศᯒ໬Ꮫ఍ࡀ㡺ᕸࡋ࡚࠸ࡿ㨶㢮ㄆド
ᶆ‽≀㉁(JSAC0785)ࢆ⮬ືศᯒ⿦⨨⿦⨨࡟ࡼࡾศᯒࡋࡓ࡜ࡇࢁࠊ⤖ᯝࡣ 11.8 ± 1.6Bq/kg ⅊ࠊ
13.0 ± 1.6Bq/kg ⅊࡛࠶ࡾࠊㄆド್(11.5 ± 1.2 Bq/kg ⅊)࡜Ⰻࡃ୍⮴ࡋ࡚࠾ࡾࠊ㛤Ⓨࡋࡓ⮬ືศᯒ⿦⨨ࡣ✀ࠎࡢ㣗ရヨᩱ࡬ࡢ㐺⏝ࡀྍ⬟࡛࠶ࡿࡇ࡜ࡀ☜ㄆࡉࢀࡓࠋ

Determination of Strontium-90 in Food Samples Using Automatic Radiochemical Analysis System
Shigeru Bamba, Takahisa Matsue, Ken Fujimori, Hirofumi Seto, Rie Kodama, Takao Morimoto,
Masahiko Shibazaki- 89 -

䢢

P10࢖࢜ࣥ஺᥮ἲࢆ⏝࠸ࡓᾏỈ୰ᨺᑕᛶࢫࢺࣟࣥࢳ࣒࢘ࡢ໬Ꮫศ㞳(ឿᜨ་኱࣭࢔࢖ࢯࢺ࣮ࣉ 1ࠊ(ᰴ)᪥❧〇సᡤ࣭࣊ࣝࢫࢣ࢔ BU2ࠊྡ኱࣭RIC ศ㤋 3)⟪㍯ࡣࡿ࠿ 1ࠊຍ⸨⤖ⰼ 2ࠊ⥴᪉Ⰻ⮳ 3䛆⥴ゝ䛇 ⎔ቃヨᩱ୰ࡢᨺᑕᛶࢫࢺࣟࣥࢳ࣒࢘ ヨᩱ䠖ேᕤᾏỈ 200ml 㻌㻌 㻌 㻌 㻌 㻌 conc. HCl㻌 0.2ml 㻌85㝧䜲䜸䞁ࡢศᯒࡣࡇࢀࡲ࡛ࠊ࢖࢜ࣥ஺᥮ἲ࣭Ⓨ↮◪㓟
Sr 䝇䝟䜲䜽
஺᥮䜹䝷䝮
[㏻㐣ᾮ]㻌
ἲ࣭ࢩࣗ࢘㓟ሷἲ࡞࡝ᡭ㡰ࡀ↹㞧࡛໬Ꮫศ㞳
Dowex
㓑㓟䜰䞁䝰䝙䜴䝮
50W-X8,᧯స࡟᫬㛫ࡀ࠿࠿ࡾ๻≀ࡢ౑⏝ࡀᚲ㡲࡛࠶ࡿ 㻌 䇲䝯䝍䝜䞊䝹⁐ᾮ[Ὑίᾮ]㻌
50-100mesh㻌᪉ἲࡀ⏝࠸ࡽࢀ࡚࠸ࡓࠋ⚟ᓥ➨୍ཎⓎ஦ᨾ࡟ 4M-HCl㻌 60ml
CV=10ml㻌[⁐ฟᾮ]㻌ࡼࡿởᰁỈࡢᾏὒ₃ὤࢆཷࡅࠊᾏỈ୰ࡢᨺᑕ㻌ᛶࢫࢺࣟࣥࢳ࣒࢘ࢆ▷᫬㛫࡛ ᐃࡋホ౯࡛ࡁ
H2O 䛷ᕼ㔘㻌 䡚200ml 㻌ࡿ᪉ἲࡢ☜❧ࡀồࡵࡽࢀ࡚࠸ࡿࠋᡃࠎࡣᨺᑕ᧠ᢾ 㻌ᛶࢫࢺࣟࣥࢳ࣒࢘ࡢᏳ඲࠿ࡘ⡆࣭᫆㎿㏿࡞ศ
6M-NaOH ⁐ᾮ㻌 ⣙ 30ml㻌 pH>9 㻌
Ⅳ㓟䝘䝖䝸䜴䝮䠄⢊ᮎ䠅㻌 2g㻌
ᯒἲࡢ㛤Ⓨࢆ┠ⓗ࡜ࡋ࡚ࠊ㝧࢖࢜ࣥ஺᥮ᶞ⬡⁐ゎ㻌㻌 ↓㻌ࢆ⏝࠸ࡓ࣒࢝ࣛ࡟ࡼࡿศ㞳ࢆヨࡳࡓࠋຍ⇕㻌 Ἓ㦐ᚋ䚸80Υ䛷 1 ᫬㛫㻌䛆ᐇ㦂䛇 ேᕤᾏỈ㸦ࢲ࢖ࢦேᕤᾏỈ SPࠊ᪥ᮏ㻌 䊼㻌85ᨺ෭䡚㟼⨨㻌 ୍ᬌ㻌〇⸆㸧࡟ Sr ࢆࢫࣃ࢖ࢡࡋࡓヨᩱࢆㄪ〇ࡋ࡚㻌 䊼㻌໬Ꮫศ㞳ࢆ⾜ࡗࡓࠋFig.1 ࡟ศ㞳᧯సᡭ㡰ࢆ♧
྾ᘬℐ㐣 (Membrane filter 0.45Pm)㻌
㻌 ↓ →[ୖ⃈] 㻌ࡍࠋேᕤᾏỈヨᩱ 200ml ࢆ㝧࢖࢜ࣥ஺᥮ᶞ⬡[ỿẊ] 㻌㻌↓ 㻌
㸦DowexTM 50W-X8㸧ࢆ඘ሸࡋࡓ࣒࢝ࣛ࡟㏻ࡋࠊ஝⇱ 㻌㝧࢖࢜ࣥࢆ྾╔ࡉࡏࡓࠋ࣒࢝ࣛࢆ 15.4W/V%㻌↓ 㻌䝷䝭䝛䞊䝖ᑒධ 㻌㓑㓟࢔ࣥࣔࢽ࣒̺࣓࢘ࢱࣀ࣮ࣝ⁐ᾮ㸦ᐜ㔞ẚ㻌↓ 㻌ᨺᑕ⥺ ᐃ 㻌1:1㸧࡛Ὑίࡋ CaࠊMg ࢆ⁐ฟࡉࡏࡓᚋࠊ4M-HCl⁐ᾮ 60ml ࡛ Sr ࢆ⁐ฟࡋࡓࠋ⁐ฟᾮ࡟ NaOH
Fig.1 ᾏỈヨᩱ࠿ࡽࡢ Sr ໬Ꮫศ㞳᧯స⁐ᾮࢆຍ࠼ pH>9 ࡜ࡋࠊNa2CO3 ࢆຍ࠼࡚ 80Υ࡛㸯᫬㛫ຍ⇕ࡋࡓᚋࠊ୍ᬌ㟼⨨ࡋࠊⅣ㓟ሷỿẊࢆ⏕ᡂࡉࡏࡓࠋࡑࡢᚋࠊ྾ᘬℐ㐣࡟ࡼࡾỿẊࢆ࣓ࣥࣈࣞࣥࣇ࢕ࣝࢱ㸦IsoporeTM 0.45Pm, Millipore Corp.㸧࡟ᤕ㞟ࡋࡓࠋỿẊࢆࣇ࢕ࣝࢱࡈ࡜
஝ᅛᑒධࡋࠊNaI ᐃჾ㸦ᛂ⏝ග◊㸧࡛ ᐃࡋࡓࠋศᯒ㏵୰ࡢྛ⁐ᾮࡣࣂ࢖࢔ࣝ࡟ධࢀ Well
ᆺ NaI ࣐࢞ࣥ࢝࢘ࣥࢱ࣮㸦ARC-7001, Hitachi, Ltd.㸧࡛ ᐃࡋࠊSr ࡢᅇ཰⋡ࢆồࡵࡓࠋ䛆⤖ᯝ䛸⪃ᐹ䛇 ᭱㐺࡞᮲௳࡟࠾࠸࡚ Sr
Table 1 ໬Ꮫศ㞳᧯స࡟࠾ࡅࡿ Sr ᅇ཰⋡ᅇ཰⋡ࡣ 95%࡛࠶ࡗࡓࠋ㝧࢖࢜ࣥ஺᥮
࣒࢝ࣛࢆ㓑㓟࢔ࣥࣔࢽ࣒̺࣓࢘ࢱࣀ࣮
ࣝ⁐ᾮ࡟ࡼࡾὙίࡍࡿ㝿ࠊጉᐖඖ⣲ࡢ㝖ཤ๭ྜ࡜ Sr ࡢᅇ཰⋡࡜ࢆ⪃៖ࡋ᭱ࡶ㐺ษ࡞ᾮ㔞࡟࡚ᐇ᪋ࡍࡿᚲせࡀ࠶ࡿࠋᶆ‽ⓗ࡞ᾏỈ⃰ᗘࡢሙྜࡣὙίᾮ㔞ࡀ
20ml ࡛

ヨᩱヨᩱ⁐ᾮ㏻㐣ᾮ㓑㓟࢔ࣥࣔࢽ࣒̺࢘
࣓ࢱࣀ࣮ࣝὙίᾮ
Ⅳ㓟ሷỿẊୖ⃈Ⅳ㓟ሷỿẊSr ᅇ཰⋡(%)
No.1
No.2
No.3
0.73
1.11
0.43
40ml
30ml
20ml
18.2
12.5
3.8
4.5
2.1
1.2
72.2
79.1
94.8

ᐃ࡟༑ศ࡞ Sr ࡢศ㞳ࡀ࡛ࡁࡓࠋࡇࡢ᪉ἲ࡟ࡼࡾᾏỈヨᩱ࠿ࡽࡢ Sr ࡢศ㞳ࡀ㸰᪥㛫࡛ྍ⬟࡜࡞ࡗࡓࠋ௒ᚋࠊᨺᑕᛶࢭࢩ࣒࢘ࡀඹᏑࡋࡓሙྜࡢᡭ㡰࠾ࡼࡧ཰⋡ࢆ☜ㄆࡋࡓᚋࠊᾏ
Ỉヨᩱ࠿ࡽࡢ 90Sr ࡢᐃ㔞࡟㐺⏝ࡍࡿணᐃ࡛࠶ࡿࠋ
Research of a rapid analysis for radiostrontium in sea water by ion exchange chromatography
MINOWA, H., KATO, Y., OGATA, Y.

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ᅛ┦ᢳฟ䝕䜱䝇䜽䜢⏝䛔䛯ᨺᑕᛶ䝇䝖䝻䞁䝏䜴䝮ศᯒ⏝⥺※䛾㻌㎿㏿స〇ἲ 㻌P11᫂኱㝔⌮ᕤ  ࠊ᫂኱◊✲࣭▱㈈ᡓ␎ᶵᵓ  ࠊࣜ࢞ࢡ  ࠊ᫂኱⌮ᕤ  ‫⸨ۑ‬஭೺ᝅ  ࠊᰩཎ㞝୍  ࠊ኱ῲᩔྖ  ࠊ୰ᮧ฼ᘅ  ࠊᑠụ⿱ஓ  䛆⥴ゝ䛇 ᩥ㒊⛉Ꮫ┬䛜ᐃ䜑䛶䛔䜛ᨺᑕᛶ䝇䝖䝻䞁䝏䜴䝮䛾ศᯒἲ 1) 䛿䚸䜲䜸䞁஺᥮ἲ䜔ỿẊἲ䛻䜘䛳䛶䝇䝖䝻䞁䝏䜴䝮䛾ศ㞳䜢⾜䛔䚸ỿẊἲ䛷⥺※䜢స〇䛧䛯ᚋ䚸ᨺᑕ⥺ィ 䜢⾜䛖᪉ἲ䛷䛒䜛䛯䜑䚸☜❧䛥䜜䛯ศᯒ᪉ἲ䛷䛿䛒䜛䛜㎿㏿ᛶ䛻Ḟ䛡䜛䚹㏆ᖺ䚸ᅛ┦ᢳฟ๣䛻䜘䜛ศ㞳䛸 ICP-MS 䛻䜘䜛ィ 䛸䜢⤌䜏ྜ䜟䛫䛯㎿㏿ศᯒἲ䛜㛤Ⓨ䛥䜜䛶䛔䜛䛜䚸䝇䜽䝸䞊䝙䞁䜾ศᯒ䛸䛧䛶䛾฼⏝䛜୺䛺┠ⓗ䛷䛒䜛䚹ᴟᚤ㔞䛾ᨺᑕᛶ䝇䝖䝻䞁䝏䜴䝮䛻䛴䛔䛶ṇ☜䛷ಙ㢗ᛶ䛾㧗䛔䝕䞊䝍䜢ᚓ䜛䛯䜑䛻䛿䚸ᨺᑕ⥺ィ 䛻䜘䜛ศᯒ䛜ᮃ䜎䛧䛔䚹ᮏ◊✲䛷䛿䚸ᨺᑕᛶ䝇䝖䝻䞁䝏䜴䝮ศᯒ⏝⥺※䜢㎿㏿䛛䛴⡆౽䛻స〇䛩䜛䛯䜑䛻䚸Ᏻᐃ Sr ཬ䜃 Y 䛾ῧຍᅇ཰ᐇ㦂䛻䜘䜚ᅛ┦ᢳฟ䝕䜱䝇䜽䜢⏝䛔䛯⥺※స〇ἲ䛾᳨ウ䜢⾜䛳䛯䚹䛆ᐇ㦂䛇 ᅵተㄆドᶆ‽≀㉁䠄JSO-1䠅0.1 g 䛻 Sr ᶆ‽ᾮཬ䜃 Y ᶆ‽ᾮ䠄1000 mg L -1 䠅䜢ྛ
1 mL ຍ䛘 HF, HClO 4 , HNO 3 䛾ΰ㓟䛷㓟ศゎ䛧䛯䚹㓟ศゎᚋ 8 mol L -1 HNO 3 20 mL 䛷⁐ゎ䛧ヨᩱ⁐ᾮ䛸䛧䛯䚹ヨᩱ⁐ᾮ䜢 Eichrom ♫〇 Sr resin ® ཬ䜃 DGA resin ® 䜹䞊䝖䝸䝑䝆䠄2
mL䠅䜢㐃⤖䛥䛫䛯䜹䝷䝮䛻 1-2 mL min -1 䛷㏻ᾮ䛩䜛䛣䛸䛷 Sr resin 䛻 Sr 䜢䚸DGA resin 䛻
Y 䜢䛭䜜䛮䜜ᢳฟ䛧䛯䚹⥆䛔䛶 8 mol L -1 HNO 3 30 mL 䛷㐃⤖䛧䛯䜹䝷䝮䜢Ὑί䛧䛯ᚋ䚸Sr
resin 䛸 DGA resin 䜢ศ㞳䛧䚸Sr resin 䛛䜙 0.05 mol L -1 HNO3 30 mL 䛷 Sr 䜢⁐㞳䛧䚸DGA
resin 䛛䜙 0.1 mol L -1 HCl 䛷 Y 䜢⁐㞳䛧䛯䚹Sr resin ཬ䜃 DGA resin 䛾⁐㞳ᾮ䛻 0.1 mol
L -1 CH 3 COONH 4 ⁐ᾮ 500 mL 䜢ຍ䛘䛶 Sr resin 䛾⁐㞳ᾮ䜢 pH 6 䛻䚸DGA resin 䛾⁐㞳ᾮ 䜢 pH 5 䛻 ㄪ ᩚ 䛧 䛯 䚹 䛣 䛾 ヨ ᩱ ⁐ ᾮ 䜢 䚸 䛒 䜙 䛛 䛨 䜑 䝁 䞁 䝕 䜱 䝅 䝵 䝙 䞁 䜾 䛧 䛯 3M TM ♫ 〇Empore TM 䜻䝺䞊䝖䝕䜱䝇䜽䠄47 mm䠅䛻 50 mL min -1 䛷㏻ᾮ䛧䚸Sr ཬ䜃 Y 䜢䛭䜜䛮䜜⃰⦰䛧
䛯䚹㏻ᾮ᧯స䜢⾜䛳䛯䜻䝺䞊䝖䝕䜱䝇䜽䜢 60°C 䛷 40 ศ㛫஝⇱䛥䛫䛯ᚋ䚸䝬䜲䝷䞊⭷䠄䝣䜱䝹䝮ཌ 3.6 Pm䠅䜢ෆഃ䛻ᣳ䜣䛰≧ែ䛷䝷䝭䝛䞊䝖䝣䜱䝹䝮䠄䝣䜱䝹䝮ཌ 100 Pm䠅䛻䜘䜛䝁䞊䝔䜱䞁䜾䜢᪋ 䛧䚸䝕䜱䝇䜽ヨ ᩱ 䜢స 〇 䛧䛯䚹䝕䜱䝇䜽ヨ ᩱ 䛿⺯ ග X ⥺ ศ ᯒ ⿦ ⨨ 䠄XRF; 䝸䜺䜽〇 RIX
3100䠅䛷 ᐃ䜢⾜䛔䚸Sr ཬ䜃 Y 䛾ᅇ཰⋡䜢⟬ฟ䛧䛯䚹⟶⌫䛿 Rh 䜢⏝䛔䚸⟶㟁ᅽ 50 kV,⟶㟁ὶ 80 mA 䛷ືస䛥䛫䛯䚹 ᐃᚄ䛿䚸30 mmI 䜢౑⏝䛧䛯䚹ᅇ཰⋡䛿ண䜑ྠᵝ䛾᮲௳䛷సᡂ䛧䛯᳨㔞⥺䜢⏝䛔䛶⟬ฟ䛧䛯䚹䛆⤖ᯝཬ䜃⪃ᐹ䛇㻌 䜻䝺䞊䝖䝕䜱䝇䜽䜈䛾 Sr ཬ䜃 Y 䛾ᅇ཰⋡䜢 Table 1 䛻♧䛩䚹Sr ཬ䜃 Y䛾ᅇ཰⋡䛿䜋䜌 100% 䛷䛒䜚䚸ヨᩱ⁐ᾮ୰䛾 Sr ཬ䜃 Y 䛾඲㔞䜢䜻䝺䞊䝖䝕䜱䝇䜽䜈⃰⦰䛩䜛䛣䛸䛜䛷䛝䛯䚹ᩥ㒊⛉Ꮫ┬䛜ᐃ䜑䛶䛔䜛ศᯒἲ䛷䛿䚸ヨᩱ᥇ྲྀ䛛䜙 ᐃ䜎䛷䛻⣙୍䛛᭶䜢せ䛩䜛䚹䛣䜜䛻ᑐ䛧䚸ᮏ◊✲䛾ศᯒ᪉ἲ䛷䛿䚸ヨᩱ䛾ศゎ䛛䜙䝕䜱䝇䜽ヨᩱ䛾ศᯒ䜎䛷䛾ᕤ⛬ 䜢⣙ 5 ᪥䛷⾜䛖䛣䛸䛜䛷䛝䛯䚹Ⓨ⾲䛷䛿䛥䜙䛻ᨺᑕ⥺ィ 䛻䜘䜛ᨺᑕᛶ䝇䝖䝻䞁䝏䜴䝮䛾ᐃ㔞 ⤖ᯝ䜔ጉᐖඖ⣲ (E ⥺ᨺฟ᰾✀) 㝖ཤ䛾᳨ウ⤖ᯝ䜢♧䛩䚹
Table 1 Spike tests for Sr and Y in JSO-1 extracted with inimodiacetate chelating disk
2)
Added / mg
Found / mg
Recovery, %Element
Content / mg
Sr

0.01971.003
0.00251.000Y( ): Relative standard deviation,% (n = 5)0.984 (1.1)
0.976 (4.6)

96.3 (3.8)
97.4 (2.4)

䛆ཧ⪃ᩥ⊩䛇 1) ᩥ㒊⛉Ꮫ┬, “ᨺᑕ⬟ ᐃ䝅䝸䞊䝈 2 ᨺᑕᛶ䝇䝖䝻䞁䝏䜴䝮ศᯒἲ” (2003)
2) S. Terashima et al. Geostandards Newsletter, 26, 85 (2001)

Rapid source preparation for radiostrontium analysis using solid-phase extraction disk
FUJII, K., KURIHARA, Y., OHBUCHI, A., NAKAMURA, T., KOIKE, Y.

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P12



 Ra ĚJAEA1ĉ¿ LLRL2ãÁ 3ě Óç 1ÓY· 2Ë b 1q ê 3ĊüR 2³¬` 2 āĕ®¼u%.-Î«¢µà éqªo*-Wº dąò"PÔÖÂ×.- Q(1F4E}Ĕaè- Ra tUX!ĘđáëĈ\­( 'dąò" ëĈú[Mćôaè-LïÖ~N¼Q 226Ra Ê
!fZ¢ ,f ę -¡ 226Ra Ê(ę - Ü+.- +āÄ¼(Č/+PÔ]_¸ČĚWHOě '-52;I9G?FĚ226Ra:
103 mBq L-1228Ra: 102 mBq L-1ě0Ā- Ra tUX0u&~N¼ þ |Õõ. ,ĚsNzěÄ¼å~N¼Q Ra tUX Ê¥©) §i÷² PÔÖćôýē-±³ !Ä¼å~N¼Q Ra tUXČ-Ç<K:! ¼QRa tUX Êäy) §i!O²Ì(³Ýâ!ÞÚĚkÙĖěðÚčÚĚÐÃě¨oÄ¼å~N¼Q Ra tUXĚ226Ra228RaěÊäy0²+ -( Ê0gæ-ôx¶ø0ñ  ~N¼JÈ¼ û®¨o!ÞÚkÙĖĚ9 ~ÌěðÚĚ12~Ìěm#čÚÐÃ JAEA ÐÃĀÅ~Ýâ¤ ÝâădöÇĚ13 û®ě ñ¼û® pHĆjĄaĒUĒ»TÆ!Ï~ØÇ¼û®Ě2040 LěQ Ra tUX!Ra ½´ ¹Í Ba 6CE1K0Ò BaSO4 c¾À*,wn3 ĂċSM«ì γë9@7=HB=EK*,ĈRa VÊ û®
!ĉ¿VG?F«îė°ù ~NÇ Ç¼Q
Đ23I!ICP-AES l! ICP-MSď23I!23I7HA=8D>Çóì1F4E
!ÉÀ*,Ç   ÞÚðÚ¨o¼û® ąf!ĆjÖ Ca-HCO3 čÚ¨o¼û®!ĄaÖ Na-ClĚJHCO3ě~N¼Q 226Ra  228Ra Ê!.. 0.0735¶eĎÔSNĚ0.15ě76 mBq L-1 ,WHO '-52;I9G?F*,(V^čÚ
226
RaĚ8.035 mBq¨o~N¼-1
L ě!ÞÚĚ0.152.7 mBq L-1ě)ðÚĚ0.072.9 mBq L-1ě ~N¼*,(ęÊĚszěÞÚ)ðÚ¨o~N¼!VfĆjÖ-'Ra {ÙvÛ)Ñ-í+.-L¯čÚ ~N¼!*,f ę ĄaÖ-'Ra {Ù$ vÛ¦g.Ra tUX ¼Ù]
.)Ñ,226Ra *,ęÊrî¢ í+. ³Ýâ!JSPS ßÝÿĚ26740021ě
z ¼û®Q 226Ra Êf Č\
h£0p°
Ra isotopes in fresh groundwaters
TOMITA, J., MIYATA, Y., HAMA, K., SAKAGUCHI, A., NAGAO, S., YAMAMOTO, M.

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

P13ࢣ࢖㓟ሷ㖔≀୰ࢺ࣒ࣜ࢘࠾ࡼࡧࣛࢪ࣒࢘ࡢྠ఩యࡢᏑᅾᙧែ ᫂኱㝔⌮ᕤ ࠊ᫂኱◊✲࣭▱㈈ᡓ␎ᶵᵓ ࠊ᫂኱⌮ᕤ  ‫ۑ‬ሷཎⰋᘓ ࠊᰩཎ㞝୍ ࠊ୰ᮧ฼ᘅ ࠊᑠụ⿱ஓ 䛆⥴ゝ䛇㻌 㖔≀࡟ᑐࡍࡿ㓟⁐ᾮࢆ⏝࠸ࡓ⁐ฟᐇ㦂࡟࠾࠸࡚ࠊ⁐ฟᾮ୰ࡢࢺ࣒ࣜ࢘࠾ࡼࡧࣛࢪ࣒࢘
ྠ఩యࡢᨺᑕ⬟ẚࡀ㖔≀୰ࡢ್࡜␗࡞ࡿࡇ࡜ࡀ▱ࡽࢀ࡚࠸ࡿ 1, 2)ࠋࡇࡢ㐪࠸ࡣࠊྠ఩యࡀ⏕ᡂࡉࢀࡿࡲ࡛ࡢቯኚᒚṔ࡟ࡼࡿ࡜⪃࠼ࡽࢀ࡚࠸ࡿࡀࠊࡇࡢゎ㔘࡟ᙜ࡚ࡣࡲࡽ࡞࠸ሙྜࡶ࠶ࡿࠋ
ࡇࡢཎᅉࢆ᥈ࡿࡓࡵ࡟ࠊࢣ࢖㓟ሷ㖔≀࡛࠶ࡿ࢖ࢵࢺࣜ࢔▼࠾ࡼࡧࢺ࣮ࣝ▼࡟ᑐࡋ࡚ᅵተ࡞࡝
࡟⏝࠸ࡽࢀࡿ㏲ḟᢳฟࢆ⾜࠸ࠊࢺ࣒ࣜ࢘ཬࡧࣛࢪ࣒࢘ྠ఩యࡢᙧែูศᯒࢆ⾜ࡗࡓࠋ䛆ᐇ㦂䛇 ヨᩱࡣࠊ࢘ࣛࣥࢆከࡃྵࡴ࢖ࢵࢺࣜ࢔▼࠾ࡼࡧࢺ࣒ࣜ࢘ࢆከࡃྵࡴࢺ࣮ࣝ▼ࡢ⢊ᮎࢆ⏝࠸ࡓࠋ࢖ࢵࢺࣜ࢔▼ࡣᨵⰋ BCR ㏲ḟᢳฟἲ 3) ࡢ Step 1㹼3 ࢆࠊࢺ࣮ࣝ▼ࡣ Step 1 ࠾ࡼ
ࡧ Step 2 ࡲ࡛㐺⏝ࡋࡓࠋࡇࡢ㏲ḟᢳฟ࡟ࡼࡾࠊStep 1 ࡛ࡣ࢖࢜ࣥ஺᥮ᛶ㝧࢖࢜ࣥࠊStep 2 ࡛ࡣ㓟໬≀ែࠊStep 3 ࡛ࡣ◲໬≀ែࠊṧ´ࡣࢣ࢖㓟ሷ࡜ࡋ࡚㖔≀୰ࡢඖ⣲ࢆᅇ཰࡛ࡁࡿ 3)ࠋྛẁ㝵ࡢ⁐ᾮࡣࠊ࢚࣏࢟ࢩ⣔ᶞ⬡࡛ࢥ࣮ࢸ࢕ࣥࢢࡋࡓࣈࣜ࢟〇ࢥࣥࢸࢼ (70 mmI, 16 mmH) ࡟ 30
mL ศྲྀࡋࠊࢢࣝࢥ࣐ࣥࢼࣥ࡜ඹ࡟⣧Ỉ࠾ࡼࡧ 2M NaOH ࢆῧຍࡋ࡚ᅛ໬ࡋ ᐃヨᩱ࡜ࡋࡓࠋ
ྛヨᩱࡣࠊ࢚࣏࢟ࢩ⣔ᶞ⬡࡛ᐦᑒࡋࡓᚋࠊ224Ra-212Pb 㛫ࡀᨺᑕᖹ⾮࡟㐩ࡍࡿ 2 ᪥㛫࠾ࡼࡧ
226
Ra-214Pb 㛫ࡀᨺᑕᖹ⾮࡟㐩ࡍࡿ 2 㐌㛫௨ୖᚅࡕࠊγ ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺࣜ࡟౪ࡋࡓࠋࢺࣜ࢘
࣒ྠ఩యࡣྠ఩యᕼ㔘ἲ / α ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺࣜ࡟ࡼࡾᐃ㔞ࡋࡓࠋ䛆⤖ᯝ䛚䜘䜃⪃ᐹ䛇 ࢖ࢵࢺࣜ࢔▼࠾ࡼࡧࢺ࣮ࣝ▼ࡢᙧែูศᯒࢆ⾜࠸ࠊ㖔≀୰ࡢࢺ࣒ࣜ࢘࠾ࡼ
ࡧࣛࢪ࣒࢘ྠ఩యࡢᏑᅾᙧែࢆほ ࡋࡓࠋFig. 1 ࡟ྛẁ㝵࡛ࡢࣛࢪ࣒࢘ྠ఩యࡢᢳฟ⋡ࢆ♧ࡍࠋ࢖ࢵࢺࣜ࢔▼୰࡛ࡣࢺ࣒ࣜ࢘⣔ิ᰾✀ࡢ᪉ࡀ࢘ࣛࣥ⣔ิ᰾✀ࡼࡾ⁐ฟࡋࡸࡍ࠸ᙧែ࡛Ꮡ
ᅾࡋࠊࢺ࣮ࣝ▼୰࡛ࡣ㏫ࡢഴྥࢆ♧ࡋࡓࠋࣛࢪ࣒࢘ྠ఩యࡣ㖔≀✀࡟ࡼࡗ࡚ྍ⁐࡞ᙧែ࡜㞴⁐࡞ᙧែࡢᏑᅾ๭ྜࡀ␗࡞ࡿ࡜⪃࠼ࡽࢀࡿࠋࢺ࣒ࣜ࢘࠾ࡼࡧࣛࢪ࣒࢘ྠ఩యࡢ㓟⁐ᾮ࡟ᑐࡍࡿ⁐ฟᣲືࡢ㐪࠸ࡣᏑᅾᙧែࡢ㐪࠸࡟㉳ᅉࡋ࡚࠸ࡿࡇ࡜ࡀ♧၀ࡉࢀࡓࠋ
(a)

Extraction rate, %

100%
100

50%
50

0%
0

(b)

100%
100

50%
50

224224Ra
Ra

226Ra
226
Ra

228228Ra
Ra

0%
0

224Ra
224
Ra

226Ra
226
Ra

228Ra
228
Ra

Fig. 1 Extraction rate of radium isotopes from yttrialite (a) and thorite (b).
: ion exchanger (Step 1), : oxide (Step 2), : sulfide (Step 3), : silicate (Residue).

࠙ཧ⪃ᩥ⊩ࠚ1) Nagai, K., et al., Radioisotopes, 55, 567 (2006); 2) Nagai, K., et al., Radioisotopes,
56, 719 (2007); 3) Rauret, G., et al., J. Environ. Monit., 1, 57 (1999).
Chemical forms of thorium and radium isotopes in silicate minerals
SHIOBARA, R., KURIHARA, Y., NAKAMURA, T., KOIKE, Y.

- 93 -

P14

TEVA ࣞࢪࣥࢹ࢕ࢫࢡࢆ⏝࠸ࡓᅵተ୰࡟ྵࡲࢀࡿࣉࣝࢺࢽ࣒࢘㎿㏿ᐃ

㔞ἲࡢ᳨ウ
㔠ἑ኱Ꮫ㝔⮬↛ ࠊ㔠ἑ኱Ꮫ㝿ࢭ  㔠ἑ኱⌮ᕤ  ‫ۑ‬ᒣᏲ⯟ᖹ ࠊୖᮡṇᶞ ࠊᶓᒣ᫂ᙪ 䛆⥴ゝ䛇㻌ཎᏊຊ᪋タࡢ஦ᨾࡀⓎ⏕ࡋࡓሙྜࠊᏳ඲☜ಖࡢࡓࡵ࡟㎿㏿࡞⎔ቃࣔࢽࢱࣜࣥࢢࡀせồࡉࢀࡿࠋ≉࡟ᅵተ୰ࡢࣉࣝࢺࢽ࣒࢘ᐃ㔞ศᯒἲࡣ⤖ᯝሗ࿌ࡲ࡛࡟᫬㛫ࡢ࠿࠿ࡿࡶࡢࡢ୍ࡘ࡛࠶ࡾࠊ᪩
ࡃ࡜ࡶศᯒ ᐃ࡟ 5 ᪥ࢆせࡍࡿࠋᮏ◊✲ࢢ࣮ࣝࣉࡣศᯒ㐣⛬ࡢ෌᳨ウ࡟ࡼࡗ࡚ࠊࡇࢀࡲ࡛ 2᪥㛫࠿࠿ࡿ࡜ࡉࢀ࡚࠸ࡓ᭷ᶵ≀ศゎ࡜ Pu ࡢ㓟⁐ฟࢆ࢔ࣥࣔࢽ࣒࢘ሷ⼥ゎἲ࡟ࡼࡾ 3 ᫬㛫࡛᏶஢ࡉࡏࡿ஦ࡀฟ᮶ࡓࡀࠊඹᏑࡍࡿጉᐖ≀㉁ࢆ㝖ཤࡍࡿࡓࡵ࡟⾜࠺⢭〇ศ㞳᧯స࡛ࡣࠊᮍࡔ⣙12 ᫬㛫ࢆせࡋࠊ㧗⃰ᗘࡢ㓟ᗫᾮࡀ⏕ࡌ࡚ࡋࡲ࠺ࠋࡑࡇ࡛ᮏ◊✲࡛ࡣࠊᚑ᮶ࡢ㝜࢖࢜ࣥ஺᥮ᶞ
⬡ࡢ௦ࢃࡾ࡟ᅛ┦ᢳฟἲࡢࡦ࡜ࡘ࡛࠶ࡿ TEVA ࣞࢪࣥࢹ࢕ࢫࢡࢆ㐺⏝ࡍࡿࡇ࡜࡛⢭〇ศ㞳㐣⛬ࡢᨵၿࢆヨࡳࡓࠋࡉࡽ࡟ࣉࣝࢺࢽ࣒࢘(Pu)ࡢ౯ᩘㄪᩚࡢᏳᐃ໬ࢆᅗࡿ஦࡟ࡼࡾᅇ཰⋡ࡢࣂࣛࡘࡁࢆゎᾘࡍࡿࡇ࡜ࢆ┠ᣦࡋࡓࠋ䛆ᐇ㦂䛇
1. ⢭〇ศ㞳ᐇ㦂㸸ᅵተ࠿ࡽ࢔ࣥࣔࢽ࢔ሷ⼥ゎἲ࡟ࡼࡾ Pu ࢆ⁐ฟࡋࡓᚋࠊ⢭〇ศ㞳ࡢࡓࡵ࡟
Pu ࢆ TEVA ࣞࢪࣥࢹ࢕ࢫࢡ࡟྾╔ࡉࡏࡓࠋ㸦ᅗ 1㸧ศ㞳ࡢ᭱㐺᮲௳ࢆ᳨ウࡍࡿࡓࡵࠊࢹ࢕ࢫࢡ
࡟㏻㐣ࡉࡏࡿ⁐ᾮ㔞ࠊ㑏ඖ๣ࡢ᭷↓ࡸ㓟⃰ᗘࡢኚ໬࡟ࡼࡾ Pu ࡢ⬺㞳≧ἣࢆㄪ࡭ࡓࠋ242Pu ࢆ཰⋡ࢺ࣮ࣞࢧ࣮࡜ࡋࠊᚑ᮶ἲ࡜ẚ㍑ࡋ࡚ᅇ཰⋡࡜ᡤせ᫬㛫ࠊU, Th ➼ࡢὙί࡟ᚲせ࡞Ὑίᾮࡢ
㔞ࠊPu ࡢ⬺㞳๣ࡢ㑅ᢥ࡟ࡘ࠸᳨࡚ウࡋࡓࠋ
2. ᅇ཰⋡ᨵၿᐇ㦂㸸Pu ࡢ౯ᩘㄪᩚࢆ᏶඲࡟ࡍࡿࡓࡵ㓟໬๣࡟㐣࣐ࣥ࢞ࣥ㓟࣒࢝ࣜ࢘ࡢ㐺⏝ࢆヨࡳࠊᚑ᮶ἲࡢ㓟໬๣࡛࠶ࡿள◪㓟ࢼࢺ࣒ࣜ࢘ࢆ⏝࠸ࡓሙྜ࡜ᅇ཰⋡ࡢẚ㍑ࢆࡋࡓࠋ䛆⤖ᯝ䛇
1. ᚑ᮶ࡢ᪉ἲ࡜ẚ㍑ࡋ࡚ࠊ⢭〇ศ㞳࡟せࡍࡿ᫬㛫ࢆ 12 ᫬㛫࠿ࡽ 0.5 ᫬㛫࡟▷⦰࡛ࡁࠊU, Th, Am ࡞࡝ࡢጉᐖ᰾✀ࡢศ㞳ࡶྜィ 40mL ࡢὙίᾮ࡟ࡼࡾ⾜࠺ࡇ࡜ࡀྍ⬟࡛࠶ࡗࡓࠋ⬺㞳࡟せࡍࡿ⁐ᾮࢆ⵨Ⓨࡀᐜ᫆࡞⣔࡛ᑡ㔞ࡢ⁐ᾮ㔞࡟ᢚ࠼ࡿࡇ࡜࡛ࠊḟࡢ ᐃ
ヨᩱㄪ〇᧯సࡢ▷⦰࡟ࡶ⧚ࡀࡗࡓࠋ
2. ᅇ཰⋡ࡀ 10㹼20%࡜㠀ᖖ࡟ప࠿ࡗࡓᅵተ࡟㐺⏝ࡋࡓ࡜ࡇࢁ 50㹼60%࡟ᨵၿࡍࡿࡇ࡜ࡀ࡛ࡁࡓࠋࡇࡢ
ࡇ࡜࠿ࡽ◲㓟Ỉ⣲࢔ࣥࣔࢽ࣒࢘ሷ⼥ゎἲࡣᅵተࢆ
↝༷ࡋ࡚᭷ᶵ≀ศゎࢆ⾜࠺ᚲせࡀ࡞ࡃ᫬㛫▷⦰࡟࡞ࡿࡀࠊ⁐ฟᾮ࡟᭷ᶵ≀ࡀྵࡲࢀ࡚ࡋࡲ࠸ Pu ࡢ㓟໬ࢆጉᐖࡋ࡚࠸ࡓ஦ࡀศ࠿ࡗࡓࠋ
ᅗ 1: TEVA ࣞࢪࣥࢹ࢕ࢫࢡ࡟ࡼࡿ Pu ࡢศ㞳ᕤ⛬

Improvements of rapidness for the analysis of plutonium in soil using a TEVA
resin-Disc
 YAMAMORI, K., UESUGI, M., YOKOYAMA, A.

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P15⢏Ꮚ≧ࣉࣝࢺࢽ࣒࢘ࡢ⢭〇᫬ᮇ᥎ᐃࡢࡓ ࡵࡢ࢔࣓ࣜࢩ࣒࢘Ș⥺ᐃἲࡢ᳨ウ ཎᏊຊᶵᵓ ‫ۑ‬Ᏻ⏣೺୍㑻ࠊ㕥ᮌ኱㍜ࠊ㔠⃝࿴ோࠊᐑᮏࣘࢱ࢝ࠊỤᆏᩥᏕࠊ㛫᯶ṇ᫂࠙ࡣࡌࡵ࡟ࠚཎᏊຊᶵᵓ࡛ࡣࠊཎᏊຊ᪋タ➼࡟࠾ࡅࡿᮍ⏦࿌άືࢆ᳨▱ࡍࡿᡭẁࡢ୍ࡘ࡜ࡋ࡚ࠊಖ㞀ᥐ⨨⎔ቃヨᩱศᯒᡭἲࡢ㛤Ⓨࢆᐇ᪋ࡋ࡚࠸ࡿࠋࡑࡢ୍⎔࡜ࡋ࡚ࠊ᪋タ➼࠿ࡽࡢᣔࡁྲྀࡾヨᩱ࡟௜╔ࡋࡓ᰾≀㉁ࢆྵࡴ⢏Ꮚࢆ SEM-EDX ࡟ࡼࡾ᳨ฟࡋࠊTIMS࡟ࡼࡾྠ఩య⤌ᡂࢆศᯒࡍࡿᡭἲࢆ☜❧ࡋࡓ 1) ࠋࡇࡢ㝿ࠊᅇ཰ࡋࡓ⢏Ꮚ୰࡟ Pu ࡀྵࡲࢀ࡚࠸ࡿࡇ࡜ࢆ஦๓࡟☜ㄆࡍࡿࡓࡵࠊĮ ⥺ ᐃࡢ㐺⏝ࢆ᳨ウࡋ࡚࠸ࡿࠋࡉࡽ࡟ࠊĮ ⥺ᐃ࡟ࡼࡗ࡚ᚓࡽࢀࡿ( 238 Pu+ 241 Am)/ (239+240)Pu ᨺᑕ⬟ẚ࡜ TIMS ᐃ࡟ࡼࡗ࡚ᚓࡽࢀࡿ Puྠ఩య⤌ᡂ࡟ࡼࡾࠊḟࡢᘧ࠿ࡽ 241 Pu/ 241 Am ྠ఩యẚࢆᑟฟࡍࡿࡇ࡜࡛ࠊPu ⢭〇᫬ᮇࡢ᥎ᐃࡀྍ⬟࡜࡞ࡿࠋ

ࡇࡇ࡛ࠊR A ࡣࠊ( 238 Pu+ 241 Am)/ (239+240)Pu ᨺᑕ⬟ẚࠊȢࡣࠊྛ᰾✀ࡢᔂቯᐃᩘ࡛࠶ࡿࠋ
ࡇࢀࡲ࡛࡟ TIMS ࣇ࢕࣓ࣛࣥࢺୖ࡟ࣆࢵࢡ࢔ࢵࣉࡋࡓ Pu ⢏Ꮚࢆ⁐ゎࡋࠊĮ ⥺ ᐃ࡟ࡼࡗ࡚( 238 Pu+ 241 Am)/ (239+240) Pu ᨺᑕ⬟ẚࢆᚓࡓ࠺࠼࡛ࠊ⥆ࡃ TIMS ᐃ࡟ࡼࡾࠊPu ྠ఩యẚ ᐃࢆヨࡳࡓࡀࠊࣇ࢕࣓ࣛࣥࢺୖ࡛⁐ゎࡋࡓ⢏Ꮚࢆ TIMS/㐃⥆᪼ ἲ࡛ ᐃࡋࡓሙྜࠊࣇ࢕࣓ࣛࣥࢺຍ⇕㟁ὶࢆ฼⏝ࡋࡓ Am࣭Pu ࡢ᫂☜࡞ศ㞳ࡀᅔ㞴࡛࠶ࡗࡓࡓࡵࠊ
241
Pu/ 239 Pu ẚࡀᚓࡽࢀ࡞࠿ࡗࡓࠋࡑࡇ࡛ࠊ⢏Ꮚࡢࡲࡲ Į ⥺ ᐃࡍࡿࡇ࡜ࢆ┠ᣦࡋ࡚࠸ࡿࠋ
๓ᅇࡢⓎ⾲࡛ࡣࠊĮ ⥺ࡢ⮬ᕫ྾཰ࡀᑠࡉ࠸ 1ȝP ⛬ᗘࡢ⢏Ꮚ࡛⢭〇᫬ᮇࢆ᥎ᐃࡋࡓࠋᮏ
Ⓨ⾲࡛ࡣࠊࡉࡽ࡟኱ࡁ࡞⢏Ꮚࢆ Į ⥺ᐃ ࡋ ࠊ Pu ྠ ఩ య ⤌ ᡂ ࡢ ㄆ ド ್ ࡜238
241(239+240)
Pu ᨺᑕ⬟ẚࢆẚ㍑ࠊᐃ㔞ᛶࢆ᳨ウࡋࡓࡢ࡛ሗ࿌ࡍࡿࠋ
( Pu+ Am)/࠙ᐇ㦂ࠚPu ⢏Ꮚࡣࠊྠ఩యᶆ‽≀㉁(SRM947)⁐ᾮࢆ⵨Ⓨ஝ᅛᚋࠊ๐ࡾྲྀࡗ࡚స〇ࡋࡓࠋ
SEM ࡟ࡼࡾ⢏ᚄࢆ ᐃࡋࡓୖ࡛ࠊ⢏Ꮚࢆࣆࢵࢡ࢔ࢵࣉࡋࠊTIMS ⏝ Re ࣇ࢕࣓ࣛࣥࢺୖ
࡟஌ࡏࡓࠋࡇࡢࣇ࢕࣓ࣛࣥࢺࢆ Į ⥺ ᐃ⿦⨨㸦ORTEC 〇 OCTETE-Plus, BU-024-600-AS,᭷ຠ㠃✚: 600 mm2 㸧࡛ ᐃࡋࡓࠋ࡞࠾ࠊヨᩱ-᳨ฟჾ㛫㊥㞳ࡣࠊ5 mmࠊ ᐃ᫬㛫ࡣࠊ180୓⛊࡛࠶ࡿࠋĮ ⥺ࡢ⮬ᕫ྾཰࡟ࡼࡿࣆ࣮ࢡࡢ㔜࡞ࡾࡣࠊ
WaveMetrics 〇 IgorPro ࡢ Multi-Peak fitting ᶵ⬟ࢆ฼⏝ࡋࠊศ㞳࣭ゎᯒࡋࡓࠋ࠙⤖ᯝ࡜⪃ᐹࠚPu ࡢ⢏Ꮚᚄࡣࠊ1.3㹼4.7ȝP ࡛࠶ࡗࡓࠋ
౑⏝ࡋࡓ SRM947 ࡢ⢭〇ᚋࡢ⤒㐣᫬㛫ࡣࠊ7.7 ᖺ࡛࠶ࡿࡇ࡜࠿ࡽࠊㄆド್࡟ᇶ࡙ࡃ( 238 Pu+ 241 Am)/ (239+240) Pu ᨺᑕ⬟ẚࡣ 0.495 ࡛࠶ࡿࠋ⢏ᚄࡀ 2ȝP ࢆ㉸࠼ࡿሙྜࠊࢫ
࣌ࢡࢺࣝゎᯒ࡟ࡼࡿࣆ࣮ࢡࡢศ㞳ࡀ㞴ࡋࡃࠊㄆド್࠿ࡽㄗᕪ 1Vࡢ⠊ᅖࢆ኱ࡁࡃࡎࢀࡓࠋᮏἲࢆ㐺⏝ࡍࡿሙྜࠊ
ࣆࢵࢡ࢔ࢵࣉࡍࡿ⢏Ꮚࡢ኱ࡁࡉࢆࠊ2ȝP ࡲ࡛࡜ࡍࡿᚲᅗ 㸸 ⢏ ᚄ ࡟ ᑐ ࡍ ࡿ ( Pu+ Am)/
Pu ᨺ ᑕ ⬟ ẚ
せࡀ࠶ࡿࡇ࡜ࡀศ࠿ࡗࡓࠋ
238- 95 -

241(2 3 9 + 2 4 0 )P16࢔ࢡࢳࣀ࢖ࢻࢆྵࡴ඲⮬ືᴟᚤ㔞ከඖ⣲㏲ḟศ㞳ἲࡢ㛤ⓎཎᏊຊᶵᵓ࣭ಖ㞀ᥐ⨨ศᯒ໬Ꮫ◊✲ࢢ࣮ࣝࣉ ‫ۑ‬ᐑᮏࣘࢱ࢝ࠊᏳ⏣೺୍㑻ࠊ㛫᯶ṇ᫂䛆⥴ゝ䛇㻌 ⎔ቃኚື࡟ࡼࡾ⃰ᗘࡸྠ఩య⤌ᡂࡀኚືࡋࡸࡍ࠸ U, Th, Pb ࡞࡝ࡢඖ⣲ࡣᆅ⌫໬Ꮫࡸ⎔ቃ໬Ꮫ࡛◊✲ࡢࣉ࣮ࣟࣈ࡜ࡋ࡚ ᐃࡉࢀ࡚ࡁࡓࠋࡉࡽ࡟ࠊཎᏊຊ᪋タࡢ஦ᨾࡸ᰾ᐇ㦂࣭᰾⇿ᙎ࡞࡝࡟ࡼࡗ࡚⎔ቃ୰࡟ᨺฟࡉࢀࡓᨺᑕᛶ᰾✀ࡶ⌧≧ࡢศᕸ≧ἣࡢᢕᥱࡸ㛗ᮇⓗ࡞⃰ᗘኚືࡢண ࢆࡍࡿࡓࡵ࡟ ᐃࡉࢀ࡚࠸ࡿࠋ≉࡟ேᕤᨺᑕᛶඖ⣲࡛࠶ࡿ Pu ࡸ Am ࡣྠ఩యẚࡸ⃰ᗘ࡞࡝ࢆ ᐃࡍࡿࡇ࡜࡛ᨺฟ㉳※ࡸ⤒㐣᫬㛫࡞࡝ࡢᒚṔࡀ᥎ᐃ࡛ࡁࡿࠋศᯒ࡟౪ࡏࡽࢀࡿ⎔ቃヨᩱ୰࡟Ꮡᅾࡍࡿࡇࢀࡽࡢඖ⣲ࡣᴟᚤ㔞࡛࠶ࡿࡇ࡜ࡀከࡃࠊࡇࢀࡽࢆ⢭☜࡟ศᯒࡍࡿࡓࡵ
࡟ࡣヨᩱࡢ୺せᵓᡂඖ⣲࠿ࡽࡢศ㞳ࡀᚲ㡲࡛࠶ࡿࠋ≉࡟ Am ศᯒ࡛ࡣ໬Ꮫⓗ࡟㢮ఝࡋ࡚࠸ࡿ
ᕼᅵ㢮ඖ⣲(௨㝆ࠊLn ࡜⾲グ)ࡀከ㔞࡟ྵࡲࢀ࡚࠸ࡿヨᩱࢆ ICP-MS ࡛ ᐃࡍࡿሙྜࠊ㧗⃰ᗘࡢ⁐ᾮ࡛⿦⨨ෆ㒊ࢆởࡋ࡚ࡋࡲࢃ࡞࠸ࡼ࠺ Am ࡟≉໬ࡋࡓ໬Ꮫศ㞳ࢆ⾜࠺ᚲせࡀ࠶ࡿࠋࡇࢀ
ࡲ୍࡛ᮏࡢ㝜࢖࢜ࣥ஺᥮࣒࡛࢝ࣛࢼࣀࢢ࣒ࣛ௨ୗࡢ Pu, U, Th, Pb, Ln ࢆ㏲ḟⓗ࡟⮬ື࡛ศ㞳࡛ࡁࡿᢏ⾡ࢆ㛤Ⓨࡋ࡚ࡁࡓࠋ௒ᅇࠊࡇࡢࢩࢫࢸ࣒࡟ Am ศ㞳ࡶ⤌ࡳ㎸ࢇ࡛᭦࡞ࡿከඖ⣲㏲ḟศ㞳ࢆ┠ᣦࡍࠋࡑࡢඛ㥑ࡅ࡜ࡋ࡚ࠊࢳ࢜ࢩ࢔ࣥ㓟࢔ࣥࣔࢽ࣒࢘ࢆῧຍࡋࡓ࢔ࣝࢥ࣮ࣝ࡜ሷ㓟ࡢΰྜ⁐፹࡟ࡼࡿྂ඾ⓗ࡛ከ⏝ࡉࢀ࡚࠸ࡿ Am ࢖࢜ࣥ஺᥮ศ㞳ἲࡢᛶ⬟ࢆホ౯ࡋࡓࠋ䛆ᐇ㦂䛇㻌 ⁐፹࡜ࡋ࡚⏝࠸ࡿ࢔ࣝࢥ࣮ࣝ࡟ࡣ᭷ᶵ⁐๣సᴗ⟶⌮ࡢᚲせࡀ࡞࠸࢚ࢱࣀ࣮ࣝࢆ⏝࠸
ࡓࠋ243Am ࢫࣃ࢖ࢡ(47 pg)࡜ Ln ࢆྵࡴ ICP-MS ᰯṇ⁐ᾮ(50 ng)ࢆࡑࢀࡒࢀ 90vol%࢚ࢱࣀ࣮ࣝ
㸫1M HNO3 3.3 mL ࡟⁐࠿ࡋ࡚ヨᩱ⁐ᾮ࡜ࡋࡓࠋࡇࢀࢆ 2 ᮏࡢ㝜࢖࢜ࣥ஺᥮࣒࢝ࣛ(MCI-GEL
CA08P, ⢏ᚄ 75~150 ȝP123㸫ᙧ, ࣒࢝ࣛෆᚄ 4 mm, 㛗ࡉ 70 mm, ࣒࢝ࣛᐜ㔞 0.84 mL)࡟ࡑࢀ
ࡒࢀὶࡋ࡚ᶞ⬡ୖ࡟྾╔ࡉࡏࡓᚋࠊ80 vol%࢚ࢱࣀ࣮ࣝ㸫0.1 M HCl㸫0.5 M NH4SCN ࢆ 8 mL
ὶࡋ࡚ Ln ࢆ⁐㞳ࡉࡏࡓࠋḟ࠸࡛ 80 vol%࢚ࢱࣀ࣮ࣝ㸫0.1M HCl ࢆ 10 mL ὶࡋ࡚ Am ࢆ⁐㞳ࡉࡏࡓࠋᚓࡽࢀࡓ Am ࡜ Ln ศ㞳ศ⏬ࡣ ICP-MS ࡛ྛඖ⣲ࡢ࢖࢜ࣥᙉᗘࢆ ᐃࡋࠊศ㞳ࡋ࡞࠸ヨᩱ࡜ࡢ࢖࢜ࣥᙉᗘẚ࠿ࡽᅇ཰⋡ࢆồࡵࡓࠋ䛆⤖ᯝ䛇㻌 ⮬↛ⴠୗࡢ࢖࢜ࣥ஺᥮࡛ࡣศ㞳⤊஢ࡲ࡛ 11 ᫬㛫௨ୖ࠿࠿ࡗࡓࠋAm ࡣ Ln ࡼࡾࡶ SCN
㝜࢖࢜ࣥ࡜㘒ᙧᡂࡋࡸࡍ࠸ࡓࡵ NH4SCN ࢆྵࡴ Ln⁐㞳ᾮ࡛ࡣ⁐㞳ࡏࡎࠊࡑࡢᚋࡢ┠ⓗࡢศ⏬ࡢࡳ࡟
90㸣⁐ฟࡋࡓ(Fig. 1)ࠋLn ࡣ㍍࠸ La ࠿ࡽ㡰␒࡟⁐ฟ
ࡋ࡚ 100㸣ᅇ཰࡛ࡁࡓࡀࠊLu ࡞࡝ࡢ㔜 Ln ࡛ࡣ኱༙ࡀ Am ศ⏬࡟⁐ฟࡋࡓࠋΰྜ⁐፹ࡢ㏻ᾮ㔞ࡸ⃰ᗘࠊὶ㏿ࠊ࢖࢜ࣥ஺᥮ᶞ⬡ࡢ⢏ᚄ࡞࡝ࢆ᭱㐺໬ࡍࡿࡇ࡜࡟ࡼࡾࠊAm ࡜ Ln ࡢศ㞳ᛶ⬟ࢆᨵၿ࡛ࡁࡿྍ⬟ᛶࡣ
࠶ࡿࡀࠊNH4SCN ࡀຍ⇕࣭㓟ศゎࡉࢀࡎ࡟ከ㔞ࡢሷ࡜࡞ࡗ࡚ṧᏑࡍࡿࡓࡵࠊLn ࢆ ICP-MS ࡛ ᐃࡍࡿሙྜ࡟ࡣ⬺ሷฎ⌮ࡀᚲせ࡟࡞ࡿࠋ௒ᚋࠊ࢔ࣝࢥ࣮ࣝࡢ Fig.1 Anion-exchange separation of Am௦ࢃࡾ࡜࡞ࡿΰྜ⁐፹ࢆ⏝࠸࡚ Ln ࡜ Am ࡢ┦஫ศ㞳ࠊand lanthanides with ethanol௅acid media᭦࡟ࡣ┠ⓗඖ⣲඲࡚ࡢ㏲ḟศ㞳࡟ྲྀࡾ࠿࠿ࡿࠋ
ᮏⓎ⾲࡟ࡣ⛉◊㈝ᇶ┙◊✲(C) (25340078, 16K00592)࠿ࡽࡢຓᡂࢆཷࡅ࡚ᚓࡽࢀࡓᡂᯝࡢ୍㒊ࡀྵࡲࢀࡿࠋ

- 96 -



P17

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AJX¬47ĴÎģĆ4·ğĒ*Ćģ1,-ü¤#6$8 
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ğĒ*Ćģ9·äâ96Éõý(_ğ)Ĵ¾ğûñ|øî³êõý=MD;I<Q'35Ã7
 OJeÓ9èqm(Ē*ģ·ÂØ(÷ÿ (±Ì#6[1] Koshta et al., Appl. Radiat. Isot., 52,1287 (2000).

Dosimetry study by electron spin resonance spectroscopy using milk teeth of children
OKA, T., TAKAHASHI, A., KOARAI, K., NISHIYAMA, J., KINO, Y., SEKINE, T., SHIMIZU, Y.,
CHIBA, M., SUZUKI, T., OSAKA, K., SASAKI, K., SHINODA, H.

- 97 -

P18⚟ᓥ⎔ቃᏳ඲䝉䞁䝍䞊䛻䛚䛡䜛⎔ቃᅇ᚟䜈䛾ྲྀ⤌䜏㻌ཎᏊຊᶵᵓ⚟ᓥ  ‫ۑ‬㜿㒊ᐶಙࠊྜྷᕝⱥᶞࠊ᫬⃝Ꮥஅࠊὸጔ᪂୍㑻ᅜ❧◊✲㛤Ⓨἲே᪥ᮏཎᏊຊ◊✲㛤Ⓨᶵᵓ㸦ཎᏊຊᶵᵓ㸧⚟ᓥ⎔ቃᏳ඲ࢭࣥࢱ࣮ࡣࠊ⚟ᓥ➨
୍ཎᏊຊⓎ㟁ᡤࡢ஦ᨾⓎ⏕┤ᚋࡼࡾࠊཎᏊຊ⅏ᐖ᫬ࡢᣦᐃබඹᶵ㛵࡜ࡋ࡚⥭ᛴ஦ែ࡬ࡢᨭ᥼
άື㸦⥭ᛴ᫬ࣔࢽࢱࣜࣥࢢࠊ⿕ࡤࡃ ᐃᨭ᥼㸦:%& ㌴ࡢὴ㐵㸧ࠊఫẸࡢ೺ᗣ┦ㄯ࣍ࢵࢺࣛ࢖ࣥ
ᑐᛂࠊᨺᑕ⥺⟶⌮࣭ᐃ࡟ᦠࢃࡿேᮦࢆ⫱ᡂࡍࡿάື➼㸧ࢆᐇ᪋ࡋ࡚ࡁࡓࠋࡲࡓࠊᅜ࠿ࡽࡢጤクࢆཷࡅ࡚ࠊᨺᑕᛶ≀㉁ࡢศᕸ≧ἣ➼࡟㛵ࡍࡿㄪᰝ◊✲㸦࣐ࢵࣉ஦ᴗ㸧ࠊ㝖ᰁࣔࢹࣝᐇド஦ᴗࢆᐇ᪋ࡋࠊ஦ᨾᚋࡢᨺᑕ⥺ࣔࢽࢱࣜࣥࢢᢏ⾡ࡢᶆ‽໬ࠊ✵㛫⥺㔞⋡ࡸᨺᑕᛶ≀㉁ࡢỿ╔㔞ࡢ࣐ࢵࣉࡢసᡂࠊ㝖ᰁຠᯝࡢホ౯ࠊ᪋ᕤୖࡢ␃ពⅬ➼ࠊ୍㐃ࡢ᪉ἲࡢᩚ⌮➼ࡢάືࢆᐇ᪋ࡋ
ࡓࠋ⌧ᅾࠊཎᏊຊᶵᵓࡣࠊࡩࡃࡋࡲࡢ⎔ቃᅇ᚟࡟㈨ࡍࡿࡓࡵࠊ୺࡜ࡋ࡚ձࠕࣔࢽࢱࣜࣥࢢ࡟㛵ࡍࡿᢏ⾡㛤Ⓨࠖ
ࠊղࠕᨺᑕᛶ≀㉁ࡢ⎔ቃືែ◊✲ࠖࠊճࠕ㝖ᰁ࣭ῶᐜ࡟㛵ࡍࡿᢏ⾡㛤Ⓨࠖࡢ୕ࡘࡢㄢ㢟࡟ᑐᛂࡋࠊ◊✲㛤Ⓨࢆᐇ᪋ࡋ࡚࠸ࡿࠋձࠕࣔࢽࢱࣜࣥࢢ࡟㛵ࡍࡿᢏ⾡㛤Ⓨ࡛ࠖࡣࠊ↓ே࣊ࣜࡸ↓ே㣕⾜ᶵࠊ₯Ỉ⯲ᘧࣟ࣎ࢵࢺ㸦529㸧➼ࢆ⏝࠸ࡓᮍ㝖ᰁࡢ᳃ᯘࠊἙᕝࠊἢᓊᾏᇦ➼ࡢ⥺㔞ホ౯ᡭἲࡢ☜❧ࢆ┠ᣦࡋࠊᨺᑕ⥺ᐃᢏ⾡ࡢ㧗ᗘ໬➼ࢆᐇ᪋ࡋ࡚࠸ࡿ>@ࠋղࠕᨺᑕᛶ≀㉁ࡢ⎔ቃືែ◊✲࡛ࠖࡣࠊἙᕝỈ⣔ࢆ୰ᚰ࡟ࠊᮍ㝖ᰁࡢᒣᆅ᳃ᯘ࠿ࡽỈὶࡸ㢼➼࡟ࡼࡾ⛣ືࡍࡿᨺᑕᛶࢭࢩ࣒࢘ࡢᣲືࢆ㛗ᮇ࡟ࢃࡓࡾほᐹࡋࠊ⛣ືᣲືࢆゎᯒ࣭ணࣝࢆ㛤Ⓨࡍࡿ࡜࡜ࡶ࡟ࠊண

ࡍࡿࡓࡵࡢࣔࢹ

⤖ᯝ࡟ᇶ࡙ࡁ⏕άᅪ࡟࠾ࡅࡿ⿕ࡤࡃ⥺㔞ࡢኚ໬ࢆホ౯ࡋࠊ⿕ࡤࡃ⥺㔞࡬ࡢᐤ୚ࡀ኱ࡁ࠸⤒㊰ࡢᨺᑕᛶࢭࢩ࣒࢘ࡢ⛣ືᢚไ➼ࡢᑐ⟇ࢆᥦ᱌ࡍࡿࡇ࡜ࢆ┠ⓗ࡜ࡋࡓ⚟ᓥ㛗ᮇ⎔ቃືែ◊✲㸦)75$&(㸧ࣉࣟࢪ࢙ࢡࢺࢆᐇ᪋ࡋ࡚࠸ࡿ>@ࠋճࠕ㝖ᰁ࣭ῶᐜ࡟㛵ࡍࡿᢏ⾡㛤Ⓨ࡛ࠖࡣࠊ㝖ᰁάືᨭ᥼ࢩࢫࢸ࣒㸦5(6(7㸧ࢆᵓ⠏ࡋࠊ㝖ᰁຠᯝࡢண ホ౯ᢏ⾡ࡢᥦ౪࡟ࡼࡾ⮬἞యࡢຠ⋡ⓗ࡞㝖ᰁィ⏬⟇ᐃࡢᨭ᥼➼ࢆ⾜ࡗ࡚࠸ࡿ>@ࠋࡑࡢ࡯࠿ࠊఫẸࡢ⿕ࡤࡃホ౯ࡢ୍⎔࡜ࡋ࡚⛣ືᘧ :%& ㌴➼࡟ࡼࡿෆ㒊⿕ࡤࡃᐃࠊࠕᨺᑕ⥺࡟㛵ࡍࡿࡈ㉁ၥ࡟⟅࠼ࡿ఍ࠖ➼ࡢఫẸࡢ୙Ᏻ࣭␲ၥ࡟ᑐࡍࡿࢥ࣑ࣗࢽࢣ࣮ࢩࣙࣥάື➼ࡢఫẸ࡬ࡢᨭ᥼άືࢆᐇ᪋ࡋ
࡚࠸ࡿࠋ୍᪉࡛ࠊ᚟⯆࡟ᑐࡍࡿᆅඖࡢࢽ࣮ࢬࡣࠊ஦ᨾⓎ⏕࠿ࡽ  ᖺࡀ⤒㐣ࡋࠊ᪥ࠎኚ໬ࡋ࡚࠸ࡿࠋ
ከᵝ࡞ࢽ࣮ࢬࢆⓗ☜࡟ᢕᥱࡋࠊࡑࢀ࡟ᛂ࠼ࡿ◊✲㛤Ⓨࠊᨭ᥼άືࢆᐇ᪋ࡍࡿࡓࡵࠊ⚟ᓥ┴ࠊᅜ❧◊✲㛤Ⓨἲேᅜ❧⎔ቃ◊✲ᡤࠊཎᏊຊᶵᵓࡣࠊ୕ᶵ㛵࡟ࡼࡿ༠ຊ༠ᐃࢆ⥾⤖ࡋࠊ⚟ᓥ┴⎔ቃ๰㐀ࢭࣥࢱ࣮㸦⚟ᓥ┴୕᫓⏫ࠊ༡┦㤿ᕷ㸧࡟࠾࠸࡚ࠊ୕ᶵ㛵ࡢ㐃ᦠࡢୗࠊྛᶵ㛵ࡢᣢࡕ࿡ࢆά࠿ࡋࡓ⎔ቃᅇ᚟ཬࡧ᚟⯆࡟ྥࡅࡓ◊✲ࡢ᥎㐍ࢆ㐍ࡵࠊࡩࡃࡋࡲࡢ᚟⯆࡬ᐤ୚ࡋ࡚࠸ࡃࠋ࠙ཧ⪃ᩥ⊩ࠚ
>@ཎᏊຊᶵᵓ⚟ᓥ◊✲㛤Ⓨ㒊㛛㸦㸧ᮾி㟁ຊ㸦ᰴ㸧⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾ࡟ಀࡿᗫṆᥐ⨨ཬࡧ⎔ቃᅇ᚟࡬ࡢཎᏊຊᶵᵓࡢྲྀࡾ⤌ࡳ㻌

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P19⚟ᓥᒣᆅ᳃ᯘ࡟࠾ࡅࡿᆅ⾲㠃ὶฟ≀㉁࡜✵㛫⥺㔞⋡ࡢ᥎⛣ཎᏊຊᶵᵓ⚟ᓥ ‫▼ۑ‬஭ᗣ㞝ࠊ୕⏣ᆅ຾᫛ࠊ㜿㒊ᐶಙࠊ᪂㔛ᛅྐ࠙⥴ゝࠚ⚟ᓥ➨ 1 ཎⓎ஦ᨾ࡟ࡼࡾᨺฟࡉࢀࡓᨺᑕᛶࢭࢩ࣒࢘㸦Cs-134, 137㸹௨ୗ㸪ᨺᑕᛶ Cs㸧ࡢ౪⤥※ࡢ୍ࡘ࡜ࡋ࡚ᮍ㝖ᰁࡢᒣᆅ᳃ᯘᇦࡀᣲࡆࡽࢀࡿࠋࡇࢀࡽࡢᆅᇦ࡟࠾࠸࡚ࣜࢱ࣮࠾ࡼࡧᅵተ
࡟௜╔ࡋࡓᨺᑕᛶ Cs ࡀᆅ⾲㠃ࢆὶࢀࡿ⾲㠃ὶ࡟కࡗ࡚⛣ືࡍࡿࡇ࡜࡟ࡼࡾ㸪㞄᥋ࡍࡿἙᕝࡸ
ࢲ࣒ࢆ㏻ࡌ࡚Ἑཱྀᇦ࠾ࡼࡧἢᓊᇦ࡬ὶධࡋ㸪᫬㛫ࡸሙᡤ࡟ࡼࡗ࡚✵㛫⥺㔞⋡ࡢኚ໬ࢆᘬࡁ㉳ࡇࡍྍ⬟ᛶࡀ࠶ࡿࠋᮏ◊✲࡛ࡣ㸪ࡇࡢ⛣ື⌧㇟ࡢ㉳Ⅼ࡜࡞ࡿᒣᆅ᳃ᯘࡢᩳ㠃࡟࠾ࡅࡿᆅ⾲㠃ὶฟ≀㉁ࡢ≀ᛶ➼ࢆᢕᥱࡍࡿࡓࡵ㸪 2013 ᖺࡼࡾほ ࢆ⥆ࡅ࡚ࡁࡓᒣᆅ᳃ᯘᇦ࡟タ⨨ࡋࡓ
USLE ࣉࣟࢵࢺ࠾ࡼࡧ኱ᰠࢲ࣒ୖὶᇦ࡟࠶ࡿ἞ᒣࢲ࣒࡟࠾ࡅࡿ㛗ᮇࣔࢽࢱࣜࣥࢢ⤖ᯝ࡟ࡘ࠸࡚ሗ࿌ࡍࡿࠋ
࠙ㄪᰝ࣭ᐇ㦂ࠚ2013 ᖺ 3 ᭶ᮎࡼࡾ㸪ᕝಛ⏫ᒣᮌᒇᆅ༊࡟ 2 ࢝ᡤ㸦ⴠⴥᗈⴥᶞᯘ㸧㸪ᕝෆᮧⲶᆅ༊࡟ 1 ࢝ᡤ㸦ᖖ⥳㔪ⴥᶞ㸸ࢫࢠேᕤᯘ㸧࡟ USLE ࣉࣟࢵࢺ࡜ほ ᶵჾࢆタ⨨ࡋ㸪㛗ᮇࣔࢽࢱࣜࣥࢢࢆ㛤
ጞࡋࡓࠋUSLE ࣉࣟࢵࢺࡣᖜ⣙ 4.5 ̽ 6 m㸪㛗ࡉ⣙ 10 ̽ 11 m ࡛࠶ࡾ㸪ᩳ㠃ୗ㒊࡟ὶฟ≀㉁ࢆ
ᤕࡽ࠼ࡿࡓࡵࡢᅵ◁㸪ࣜࢱ࣮ཷࡅ⏝ࡢࢺࣛࢵࣉ࠾ࡼࡧ㈓␃⏝ࢱࣥࢡࢆタ⨨ࡋ㸪ᩳ㠃࠿ࡽࡢὶฟ㔞ホ౯࠾ࡼࡧศᯒࢆ⾜ࡗࡓࠋ᥇ྲྀࡋࡓᅵ◁㸪ࣜࢱ࣮࠾ࡼࡧ⾲㠃ὶࡣ Ge ༙ᑟయ᳨ฟჾ࡟ࡼࡿ
ᨺᑕ⬟ศᯒࢆ⾜࠸㸪ྛᡂศ୰ࡢᨺᑕᛶ Cs ࢆᐃ㔞ࡋࡓࠋヨᩱ᥇ྲྀ࡟࠶ࢃࡏ࡚㸪NaI ࢧ࣮࣋࢖࣓
࣮ࢱࢆ⏝࠸࡚ 1 m 㧗ࡉࡢ✵㛫⥺㔞⋡ࢆ ᐃࡋ㸪2013 ᖺ - 2015 ᖺᮇ㛫ࡢ⤒᫬ኚ㑄ࢆㄪ࡭ࡓࠋ
ᾉỤ⏫኱ᰠᆅ༊ࡢ኱ᰠࢲ࣒ୖὶᇦᑠฟ㇂ᕝἢ࠸࡟࠶ࡿ἞ᒣࢲ࣒࡟࠾࠸࡚㸪2013 ᖺ - 2015 ᖺࡢ㛫࡟ィ 4 ᅇࡢ㢖ᗘ࡛ヨᩱ᥇ྲྀ࠾ࡼࡧ✵㛫⥺㔞⋡ࡢ ᐃࢆ⾜ࡗࡓࠋ㏻ᖖ㸪἞ᒣࢲ࣒ࡣሐయୖ
ὶ㒊ࡀ‶◁≧ែ࡜࡞ࡗ࡚࠸ࡿࡇ࡜ࡀᬑ㏻࡛࠶ࡿࡀ㸪ࡇࡢ἞ᒣࢲ࣒ࡣ᏶඲࡟ᅵ◁࡛‶ࡓࡉࢀ࡚࠸࡞࠸ࡓࡵ㸪ὶᇦ࠿ࡽࡢὶฟᅵ◁ࡀ඲࡚ሐయୖὶᇦ࡛ཷࡅṆࡵࡽࢀࡿࠋࡋࡓࡀࡗ࡚㸪ሐయෆࡢሁ✚≀㔞ኚ໬ࢆホ౯ࡍࡿࡇ࡜࡟ࡼࡗ࡚㸪ὶᇦ࠿ࡽࡢὶฟ≀ࢆホ౯ࡍࡿࡇ࡜ࡀྍ⬟࡛࠶ࡿࠋὶᇦ࠿ࡽ἞ᒣࢲ࣒࡬ὶࢀ㎸ࢇࡔሁ✚≀ィ ࡣ 3D ࣮ࣞࢨ࣮ࢫ࢟ࣕࢼ࣮ࢆ⏝࠸㸪⤒᫬ⓗ࡞ኚ໬ࢆㄪ࡭ࡓ 1㸧ࠋࡲࡓὶฟ≀㉁ࡢྵ᭷ᨺᑕᛶ Cs 㔞ࢆホ౯ࡢࡓࡵ㸪ሐయෆࡢ 0 – 5 cm ῝ᗘࡢሁ✚ᅵተ࠾ࡼࡧࣜࢱ࣮ࢆ᥇ྲྀࡋ㸪Ge ༙ᑟయ᳨ฟჾࢆ⏝࠸ࡓᨺᑕ⬟ศᯒࢆ⾜ࡗࡓࠋ✵㛫⥺㔞⋡࡟ࡘ࠸࡚ࡣほ ࣉࣟࢵࢺ࡜ྠᵝ࡟㸪NaI ࢧ࣮࣋࢖࣓࣮ࢱࢆ⏝࠸ࡓ 1 m 㧗ࡉࡢ ᐃࡋ㸪ࡑࡢኚ㑄ࢆㄪ࡭ࡓࠋ࠙⤖ᯝ࣭⪃ᐹࠚ
ᒣᮌᒇᆅ༊࠾ࡼࡧⲶᆅ༊࡟タ⨨ࡋࡓ᳃ᯘほ ࣉࣟࢵࢺ࡟࠾ࡅࡿᅵተ㸪ࣜࢱ࣮㸪⾲㠃ὶ࡟ࡼࡿᖺ㛫ࡢᨺᑕᛶ Cs ὶฟ⋡ࡣ࠾ࡼࡑ 0.1㸣࡜ᩳ㠃᪉ྥ࡬ࡢ Cs ⛣ື㔞ࡀᑡ࡞࠸ࡇ࡜ࡀࢃ࠿ࡗࡓࠋ✵㛫⥺㔞⋡ኚ㑄࡟ࡘ࠸࡚ࡣᨺᑕᛶ Cs ࡢῶ⾶᭤⥺࡟ᚑ࠺ᙧ࡛ῶᑡࡋ࡚࠸ࡃഴྥ࡛ࡣ࠶ࡿࡀ㸪ࡇࢀ࡟ࡣᨺᑕᛶ Cs ῝ᗘ᪉ྥ࡬ࡢ⛣⾜࡜ࣜࢱ࣮ࣇ࢛࣮ࣝ࡞࡝࡟ࡼࡿᶞᖿ࠿ࡽࡢ⛣ධࡢᙳ㡪ࡶ⪃៖ࡍࡿᚲせࡀ࠶ࡿࡓࡵ㸪௒ᚋ᳨ウࡀᚲせ࡛࠶ࡿࠋ୍᪉㸪἞ᒣࢲ࣒࡟ࡘ࠸࡚ࡣᨺᑕᛶ Cs ࡢὶฟ⋡ࡀᖺ㛫 0.5㸣࡜᳃ᯘほ ࣉࣟࢵࢺ࡜ẚ࡭࡚ከ࠸ࡀ㸪ࡑࡢὶฟ㔞ࡢ 7 ๭௨ୖࡀ 2015 ᖺࡢྎ㢼 18ྕ࡟క࠺኱㞵ࡢᮇ㛫࡟ὶฟࡋ࡚࠸ࡿࠋⓎ⾲࡟࠾࠸࡚ࡣὶฟ≀ࡢ≉ᛶࡶྵࡵ࡚㆟ㄽࢆ⾜࠺ࠋ࠙ཧ⪃ᩥ⊩ࠚ 1) Ώ㎶㈗ၿࡽ (2016); 3D ࣮ࣞࢨ࣮ࢫ࢟ࣕࢼ࣮࡟ࡼࡿ἞ᒣࢲ࣒ࡢᨺᑕᛶࢭࢩ࢘
࣒ሁ✚㔞ࡢኚ໬ࡢ᥎ᐃ, ᪥ᮏᆅ⌫ᝨᫍ⛉Ꮫ㐃ྜ 㐃ྜ኱఍ 2016 ᖺ኱఍
Changes of surface run-off substances and air dose rate in Fukushima mountainous forest
ISHII, Y., MITACHI, K., ABE, H., and NIIZATO, T.

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3ᨺᑕᛶ≀㉁ࡢ኱Ẽ୰࡛ࡢ㍺㏦ࢆᢸ࠺࢚࢔ࣟࢰࣝ⢏Ꮚࡢᖹᆒ⢏ᚄ࡜໬Ꮫᙧ
ಙᕞ኱ᩍ⫱ ࠊಙᕞ኱㝔ᩍ⫱  ‫ۑ‬ᮧᯇஂ࿴ ࠊᯇཎ᲍ἋᏊ ࠊᵽΏ⍞ᖿ ࠊ㏆⸨ ⲁ  䛆⥴㻌 ゝ䛇 ⚟ᓥཎⓎ஦ᨾ࡟ࡼࡿᨺᑕᛶ≀㉁ࡢศᕸ࣭ᣑᩓ࣭㍺㏦࡟㛵ࡍࡿ◊✲ࡀከࡃࡢ◊✲ᶵ㛵➼࡛ࡉࢀࡿ୰ࠊᣑᩓ㐣⛬ࢆゎ᫂ࡍࡿ࠺࠼࡛㸪ࡑࡢࠕ㐠ࡧᡭࠖ࡜࡞ࡿ኱Ẽ୰ࡢ࢚࢔ࣟࢰࣝ⢏Ꮚࡢᐇែ㸦⢏ᚄ㸪໬Ꮫᙧ㸧࡟㛵ᚰࡀ㞟ࡲࡗ࡚࠸ࡿࠋᮏ◊✲࡛ࡣ㸪ᨺᑕᛶ≀㉁ࡢᣑᩓ࣭㍺㏦ࡢᇶ
♏᝟ሗࡢྲྀᚓࢆ┠ⓗ࡟㸪࢚࢔ࣟࢰࣝ⢏Ꮚࡢศ⣭ᤕ㞟⿦⨨ࢆ⏝࠸࡚㸪%H ࡢ௜╔ࡋࡓ࢚࢔ࣟࢰࣝ
⢏Ꮚࡢ⢏ᚄศᕸࡢ

ᐃ࡜㸪㧗ᛶ⬟ᾮయࢡ࣐ࣟࢺࢢࣛࣇ࢕㸦+3/&㸧ࢆ⏝࠸ࡓ %H ࡢ㐠ࡧᡭ࡜࡞ࡿ኱Ẽ࢚࢔ࣟࢰࣝ⢏Ꮚࡢ໬Ꮫᙧࡢ᥎ᐃࢆヨࡳࡓࠋ䛆ᐇ㻌 㦂䛇 ࢔ࣥࢲ࣮ࢭࣥᆺ࣮ࣟࣉࣞࢵࢩ࣮ࣕ࢖ࣥࣃࢡࢱ /3㸪ᮾிࢲ࢖ࣞࢵࢡ ࢆ኱Ꮫ࢟ࣕࣥ
ࣃࢫෆࡢᘓ≀ࡢᒇୖ ᆅୖ⣙ P ࡟タ⨨ࡋ㸪኱Ẽ࢚࢔ࣟࢰࣝ⢏Ꮚࡢᤕ㞟ࢆ⾜ࡗࡓࠋ ᖺ࠿ࡽ  ᖺ࡟࠿ࡅ࡚ᤕ㞟ࡋ㸪ᤕ㞟ᮇ㛫ࡣ⣙  㐌㛫࡜ࡋࡓࠋ/3 ࡛ࡣ㸪྾ᘬὶ㔞ࢆ /PLQ࡜ࡍࡿ࡜ࡁ㸪኱Ẽ࢚࢔ࣟࢰࣝࡣ  ẁ㝵㸦ȝP㹼ȝP㸧࡟ศ⣭ࡉࢀ㸪࢞ࣛࢫࣉ࣮ࣞࢺ㸦
PPI㸧ୖ࡟ᤕ㞟ࡉࢀࡿࠋศ⣭ᤕ㞟ࡋࡓ࢚࢔ࣟࢰࣝࢆ㉸⣧Ỉ PO ࡟⁐ゎᚋ㸪◲㓟࣒࣋ࣜࣜ࢘
ࢆῧຍࡋ Ỉ㓟໬≀ỿẊ࡜ࡋ࡚ %H ࢆඹỿࡉࡏࡓࠋ⢏ᚄࡈ࡜ࡢᨺᑕ⬟ࡣ㧗⣧ᗘ *H ༙ᑟయ᳨ฟჾ࡟࡚ NH9 ࡢ Ȗ ⥺ࢆᐃࡋ㸪%H ࡢᐃ㔞ࢆ⾜ࡗࡓࠋ㉸⣧Ỉ࡟⁐ゎࡋࡓྛᾮయヨᩱࡢ୍㒊ศ

PO ࢆ⏝࠸࡚㸪+3/& ࡟࡚⢏ᚄࡈ࡜࡟㝧࢖࢜ࣥ࠾ࡼࡧ㝜࢖࢜ࣥࢆᐃ㔞ࡋࡓࠋ䛆⤖ᯝ䛚䜘䜃⪃ᐹ䛇 ኱Ẽ࢚࢔ࣟࢰࣝ࡟ྵࡲࢀࡿ࢖࢜ࣥᡂศࡢ࢖࢜ࣥࢡ࣐ࣟࢺศᯒ࠿ࡽ㸪㝜࢖࡚ከࡃᏑᅾࡋ࡚࠸ࡓࠋྛࢫࢸ࣮ࢪ࡟ᤕ㞟ࡉࢀࡓ࢚࢔ࣟࢰ
ࣝ⢏Ꮚ୰ࡢ %H 㸪୺ࡔࡗࡓ㝧࢖࢜ࣥ㸪㝜࢖࢜ࣥࡢ⢏ᚄศᕸࢆ )LJ ࡟♧ࡋࡓࠋ%H ᨺᑕᛶ࢚࢔ࣟࢰࣝࡢ⢏ᚄศᕸࡣ㸪௚ࡢ࢖࢜ࣥ࡟ẚ࡭㸪62㸫࠾ࡼࡧ 1+㸩ࢆྵࡴ࢚࢔ࣟࢰࣝ
⢏Ꮚࡢࡑࢀ࡜㝿ࡔࡗ࡚㢮ఝࡋ࡚࠸ࡓࠋ


%H ᨺᑕᛶ࢚࢔ࣟࢰࣝ㸪62㸫࠾ࡼࡧ 1+㸩ࢆྵࡴ኱Ẽ࢚࢔ࣟࢰࣝ⢏Ꮚࡀ༢ศᩓ㸪ᑐᩘṇつศᕸࢆࡋ࡚࠸ࡿ࡜௬ᐃ
ࡋ࡚㸪ᗄఱᖹᆒ⢏ᚄࢆ᭱ᑠ஧஌ἲ࡟ࡼࡿ㛵ᩘࣇ࢕ࢵࢸ࢕






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

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

$HURG\QDPLFGLDPHWHU DDPP)LJ7\SLFDODFWLYLW\DQGPDVVVL]HGLVWULEXWLRQVRIPDMRUDHURVROVࣥࢢࡼࡾồࡵࡓ )LJ ࠋࡇࡢゎᯒ࠿ࡽ㸪%H ᨺᑕᛶ࢚࢔ࣟ
ࢰࣝࡢᗄఱᖹᆒ⢏ᚄࡣ 㹼 ȝP ࡜᥎ᐃࡉࢀ㸪62㸫࠾ࡼࡧ 1+㸩ࢆྵࡴ࢚࢔ࣟࢰࣝ⢏Ꮚࡢᗄఱᖹᆒ⢏ᚄࡣࡑࢀࡒࢀ㸪㹼ȝP㸪㹼ȝP ࡜᥎ᐃࡉࢀࡓࠋࡇ
ࡢࡇ࡜࠿ࡽ㸪%H ࡣ 62㸫ࢆከࡃྵࡴ࢚࢔ࣟࢰࣝ⢏Ꮚ࠾ࡼࡧ 1+ 㸩ࢆከࡃྵࡴ࢚࢔ࣟࢰࣝ⢏Ꮚ࡟௜╔ࡋ࡚኱Ẽ୰ࢆᾋ㐟ࡋ࡚࠾ࡾ㸪ࡋࡓࡀࡗ࡚㸪62㸫࠾ࡼࡧ 1+㸩ࢆྵࡴ࢚࢔ࣟࢰࣝ⢏Ꮚࡀ %H ࡢ㍺㏦ࢆᢸࡗ࡚࠸ࡿ࡜᥎

ࡉࢀࡿࠋ

)LJ7\SLFDOUHVXOWLQWKHDQDO\VLVRIDHURG\QDPLF PHDQ GLDPHWHU IRU
DHURVROV LQFOXGLQJ %H3DUWLFOHVL]HDQGFKHPLFDOIRUPRIDWPRVSKHULFDHURVROVDVDFDUULHURIUDGLRDFWLYHPDWHULDOVMURAMATSU, H., MATSUBARA, R., HIWATASHI, M., and KONDO, A.

- 100 -



%H
±
62

1+
±
12



±'$FWLYLW\' ORJDD  P%TP㝿❧ࡗ࡚ከࡃᏑᅾࡋ࡚࠾ࡾࠋ㝧࢖࡛࢜ࣥࡣ 1+㸩ࡀ༟㉺ࡋ





'M/' ORJDD  PJP࡛࢜ࣥࡣ㸪&O㸫㸪12㸫࠾ࡼࡧ 62㸫ࡀከࡃ㸪≉࡟ 62㸫ࡀ



P21

᪥ᮏᅜෆ඲ᇦ࡟࠾ࡅࡿ⾲ᒙᅵተ୰ 129I ㄪᰝ-⚟ᓥ➨୍ཎⓎ஦ᨾࡢᙳ㡪-㸦᪥ᮏศᯒࢭࣥࢱ࣮㸧‫⋤ۑ‬ᬡỈ࣭ᒣ㐨⨾࿴Ꮚ࣭⠛ཎᏹᩥ࣭కሙ⁠࣭ኴ⏣⿱஧࣭☾㈅ၨ௓

䛆⥴ゝ䛇 2011 ᖺ 3 ᭶ࡢ⚟ᓥ➨୍ཎⓎ஦ᨾ࡟ࡼࡾ⎔ቃ୰࡟ᨺฟࡉࢀࡓᨺᑕᛶ≀㉁ࡣࠊ⚟ᓥ┴࡜ࡑࡢ࿘㎶ᆅᇦࢆጞࡵࠊ᪥ᮏᅜෆࡢᗈᇦ࡟ᣑᩓ࣭ỿ╔ࡋࡓࠋ129I ࡣ༙ῶᮇࡀ 1,570 ୓ᖺ࡜㛗ࡃࠊ⎔ቃ࡟࠾ࡅࡿ㛗ᮇⓗ࡞ືࡁࢆᢕᥱࡍࡿࡇ࡜ࡣ㔜せ࡞ㄢ㢟࡛࠶ࡿࠋ୍᪉ࠊ129I ศᯒᢏ⾡ࡢ㐍Ṍ࡟క࠸ࠊຍ㏿ჾ㉁㔞ศᯒἲ㸦AMS㸧ࡣឤᗘⓗ࡟ඃࢀ࡚࠾ࡾࠊ᪤࡟ 129I /127I ཎᏊᩘẚ 10-14 ࣮࢜ࢲ࣮ࡢศᯒࡀᐇ⏝໬ࡉࢀ࡚࠸ࡿࠋᮏ◊✲࡛ࡣࠊ᪥ᮏᅜෆ 47 㒔㐨ᗓ┴㸦49 ᆅⅬ㸧࡛᥇ྲྀࡉࢀࡓ஦
ᨾ๓㸦2010 ᖺ㸧ཬࡧ஦ᨾ୍ᖺᚋ㸦2012 ᖺ㸧ࡢ⾲ᒙᅵተ㸦᥇ྲྀ῝ᗘ㸸0~5cm㸧୰ࡢ 129I ࡢỿ╔࣭⵳✚≧ἣࢆㄪᰝࡋࡓࠋࡲࡓࠊཎⓎ஦ᨾ⏤᮶ࡢᙳ㡪ࢆ☜ㄆࡍࡿࡓࡵࠊྠ୍ヨᩱࡢ࣐࢞ࣥ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺ࣮ࣜ࡟ࡼࡿ 134Cs ཬࡧ 137Cs ࡢ ᐃ⤖ᯝࢆ⏝࠸࡚ࠊ᰾✀㛫ࡢᨺᑕ⬟ẚ࡟ࡘ࠸᳨࡚ウࡋࡓࠋ䛆ᐇ㦂䛇㻌 ஝⇱ࡋࡓᅵተ୰ࡢࣚ࢘⣲ࢆ⇞↝ἲ࡟ࡼࡾ TMAH (Tetramethylammonium Hydroxide)⁐ᾮ࡟ᤕ㞟ࡋࠊ⁐ᾮ࠿ࡽ୍㒊ࢆศྲྀࡋ࡚Ᏻᐃࣚ࢘⣲ᐃ㔞⏝ヨᩱ࡜ࡋࠊෆᶆ‽࡜ࡋ࡚࢖ࣥࢪ࣒࢘
ࢆ⏝࠸࡚ㄏᑟ⤖ྜࣉࣛࢬ࣐㉁㔞ศᯒἲ(ICP-MS㸧࡛Ᏻᐃࣚ࢘⣲㸦127I㸧ࢆᐃ㔞ࡋࡓࠋṧࡾࡢ⁐ᾮ࡟ࣚ࢘⣲ᢸయࢆຍ࠼ࠊ᭷ᶵ⁐፹ࢆ⏝࠸ࡓᢳฟ࡟ࡼࡾࣚ࢘⣲ࢆศ㞳࣭⢭〇ࡋࡓࠋࣚ࢘⣲⢭〇⁐ᾮ࡟㖟ᢸయࢆῧຍࡋࠊ⏕ᡂࡋࡓࣚ࢘໬㖟ỿẊ࡟ࢽ࢜ࣈ⢊ᮎࢆຍ࠼࡚ࠊ᪥ᮏཎᏊຊ◊✲㛤Ⓨᶵᵓ࣭㟷᳃◊✲㛤Ⓨࢭࣥࢱ࣮࣭ࡴࡘ஦ົᡤཬࡧᮾி኱Ꮫ MALT ࡢ AMS ࡟ࡼࡾࣚ࢘⣲ࡢཎᏊᩘẚ㸦129I/127I㸧ࢆ ᐃࡋࡓࠋᚓࡽࢀࡓ⤖ᯝ࠿ࡽ 129I ẚᨺᑕ⬟ࢆ⟬ฟࡋࡓࠋศᯒᕤ⛬ࡢጇᙜᛶࢆ
☜ㄆࡍࡿࡓࡵࠊᶆ‽ヨᩱ㸦NIST-1547㸧ࢆేࡏ࡚ศᯒࡋࡓࠋࡲࡓࠊᩥ㒊⛉Ꮫ┬ᨺᑕ⬟ ᐃࢩ࣮ࣜࢬ 7ࠕࢤ࣐ࣝࢽ࣒༙࢘ᑟయ᳨ฟჾ࡟ࡼࡿ࣐࢞ࣥ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺ࣮ࣜࠖ࡟‽ࡌ࡚ࠊ134Cs ཬࡧ 137Cs ࡢ ᐃࢆ⾜࠸ࠊࡇࢀࡽࡢᨺᑕ⬟⃰ᗘࢆ⟬ฟࡋࡓࠋ䛆⤖ᯝ䛸⪃ᐹ䛇 ⚟ᓥ➨୍ཎⓎⓎ㟁ᡤ࡜ࡢ⣙ 500km ⠊ᅖෆࡢ᥇ྲྀᆅⅬ࡛ࡣࠊ㟷᳃┴㸦1 ᆅⅬ㸧ࠊᒾᡭ┴ࠊᒣᙧ┴ࠊᐑᇛ┴ࠊ⚟ᓥ┴ࠊᰣᮌ┴ࠊ⩌㤿┴ࠊᇸ⋢┴ࠊ༓ⴥ┴ࠊᮾி㒔ࠊ⚄ዉᕝ┴ࠊᒣ᲍┴ࠊ㛗㔝┴ࠊ⚟஭┴ࠊᒱ㜧┴ࠊ㟼ᒸ┴ࠊྜィ 16 ᆅⅬ࡛஦ᨾᚋࠊ129I ⃰ᗘ࡜ 129I/127I ཎᏊᩘẚࡀྠ᫬࡟ୖ᪼ࡋࡓࡇ࡜ࡀほ ࡉࢀࡓࠋࡲࡓࠊ᪥ᮏᅜෆ඲ᇦ࡛ࡢ஦ᨾ๓ᚋࡢ⾲ᒙᅵተ୰ 129I
⃰ᗘศᕸ࠿ࡽࠊす᪥ᮏ࡟ẚ࡭ᮾ᪥ᮏࡢᅵተ࡟஦ᨾࡢᙳ㡪ࡀ㢧ⴭ࡟ㄆࡵࡽࢀࡓࠋ୍᪉ࠊ஦ᨾ 1
ᖺᚋࡢ 137Cs ⃰ᗘࡀ஦ᨾ๓࡟ẚ࡭㧗ࡃ᥎⛣ࡋࠊ஦ᨾ๓ࡢ 129I ࡜ 137Cs ࡢ┦㛵ಀᩘࡣ 0.295ࠊ஦ᨾ
1 ᖺᚋࡢ┦㛵ಀᩘࡣ 0.692 ࡛࠶ࡾࠊ஦ᨾᚋࡢ⤖ᯝ࡟࠾࠸࡚ᙉ࠸┦㛵ࡀㄆࡵࡽࢀࡓࠋ஦ᨾ๓ࠊ᰾
ᐇ㦂ࣇ࢛࣮ࣝ࢔࢘ࢺཬࡧ෌ฎ⌮᪋タ✌ື࡟క࠸⎔ቃ୰࡟ᨺฟࡉࢀࡓᨺᑕᛶࣚ࢘⣲ࡀ᪤࡟Ꮡᅾ
ࡋࡓࡓࡵࠊ஦ᨾ๓ࡢ⃰ᗘࢆࣂࢵࢡࢢࣛ࢘ࣥࢻ࡜ࡋ࡚஦ᨾᚋࡢศᯒ⤖ᯝ࠿ࡽࠊᕪࡋᘬ࠸ࡓ⤖ᯝ㸦ᨺᑕ⬟⃰ᗘࡢቑศ㸧ࢆ⏝࠸࡚ࠊ134Cs ࡀほ ࡉࢀࡓྜィ 13 ᆅⅬ㸦ᒾᡭ┴ࠊᒣᙧ┴ࠊᐑᇛ┴ࠊ⚟ᓥ┴ࠊᰣᮌ┴ࠊ⩌㤿┴ࠊᇸ⋢┴ࠊ༓ⴥ┴ࠊᮾி㒔ࠊ⚄ዉᕝ┴ࠊᒣ᲍┴ࠊ㛗㔝┴ࠊ㟼ᒸ┴㸧࡛஦ᨾ୍ᖺᚋ࡟ᅵተ࡟ỿ╔ࡋࡓ 129I ࡜ 134Cs ࡢ┦㛵ࡣ 0.808 ࡛࠶ࡾࠊࡇࢀࡽᆅⅬࡢ஦ᨾᚋ⾲ᒙᅵተ୰ࡢ 129I ⃰ᗘࡢୖ᪼ࡣࠊ஦ᨾ࡟㉳ᅉࡍࡿ࡜⪃࠼ࡽࢀࡓࠋ

Nationwide survey for 129I activity concentration of surface soil in Japan-influence of the Fukushima Dai-ichi nuclear plant accident (FDNPA) Japan Chemical Analysis Center (JCAC)
WANG, XS., YAMAMICHI, M, SHINOHARA, H., BAMBA, S., OHTA, Y., ISOGAI, K.

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

P22

໭ᴟᾏ-໭ኴᖹὒ࡟࠾ࡅࡿᾏỈ୰ࣚ࢘⣲ 129 ࡢ⃰ᗘศᕸ᪥኱㝔⥲ྜᇶ ࠊ᪥኱ᩥ⌮ ࠊ-$067(&ࠊᮾ኱༤≀㤋 ‫ۑ‬ᕤ⸨ ㍤ ࠊᒣᙧṊ㟹 ࠊỌ஭ᑦ⏕ࠊ⇃ᮏ㞝୍㑻ࠊす㔝ⱱேࠊᯇᓮᾈஅ

䛆䛿䛨䜑䛻䛇⾲ᒙ⎔ቃ୰䛻Ꮡᅾ䛩䜛 129I䠄T1/2=1.57㽢107y䠅䛿䚸1960 ᖺ௦䜎䛷┒䜣䛻⾜䜟䜜䛯኱Ẽᅪ᰾ᐇ㦂䜔᰾⇞ᩱ෌ฎ⌮᪋タ䛾✌ാ䚸1986 ᖺ䛻Ⓨ⏕䛧䛯ᪧ䝋㐃䛻䛚䛡䜛䝏䜵䝹䝜䝤䜲䝸Ⓨ㟁ᡤ஦ᨾ䜔 2011 ᖺ䛾⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾ䛷ᨺฟ䛥䜜䛯ேⅭ㉳※䛾 129I 䛜ᨭ㓄ⓗ䛷䛒䜛䚹≉䛻䝷䞉䜰䞊䜾෌ฎ⌮᪋タ䠄௖䠅䚸䝉䝷䝣䜱䞊䝹䝗෌ฎ⌮᪋タ䠄ⱥ䠅䛛䜙䛿 2007 ᖺ䜎䛷䛻ᾏὒ䜈⣙ 5400kg䚸኱Ẽ䜈⣙ 440kg ᨺฟ䛥䜜䚸ᾏὒ୰ 129I 䜲䞁䝧䞁䝖䝸䛾 95%䜢༨䜑䜛䚹䛣䜜䜙䛾෌ฎ⌮᪋タ䛛䜙ᾏὒ䜈ᨺฟ
䛥䜜䛯 129I 䛾䜋䛸䜣䛹䛿໭኱すὒ䛛䜙໭ᴟᾏ䜈ὶධ䛧䚸䜎䛯኱Ẽ୰䜈ᨺฟ䛥䜜䛯 129I 䛿೫す㢼䛻䜘䜚㍺㏦䛥䜜໭ኴᖹὒ䛺䛹䛻ỿ╔䛩䜛䚹䝶䜴⣲䛾ᾏỈ୰䛾ᖹᆒ⁫␃᫬㛫䛿 30,000 ᖺ䛸㛗䛟䚸㏆ᖺᨺฟ䛾ጞ䜎䛳䛯 129I 䛿⾲ᒙᾏỈ䛾໬Ꮫ䝖䝺䞊䝃䞊䛸䛧䛶᭷⏝䛷䛒䜛䚹ᮏ◊✲䛷䛿 129I 䛾䝕䞊䝍䛜ᑡ䛺䛔໭ᴟᾏ䛸໭ኴᖹὒ䛾 2014,2015 ᖺ䛾ᾏỈ୰ 129I 䛾ศᕸ䜢ㄪ䜉䚸䛣䜜䜙䛾ᾏᇦ䛻䛚䛡䜛ᣑᩓ≧ἣ䜔⤒ᖺኚ໬䛺䛹䛻㛵䛩䜛▱ぢ䜢ᚓ䜛䛣䛸䜢ヨ䜏䛯䚹䛆ᐇ㦂䛇ᾏὒᆅ⌫◊✲⯪䛄䜏䜙䛔䛅䛾 MR1404,05 ḟ⯟ᾏ䠄2014/7/14-2014/10/7䠅䚸MR1503 ḟ⯟ᾏ(2015/8/24-2015/10/22)䛻䛚䛔䛶᥇ྲྀ䛥䜜䛯ᾏỈヨᩱ 1L 䜢䜝㐣䛧䚸䝶䜴⣲ᢸయ䜢 1mg ຍ䛘䚸CCl4 䜢⏝䛔䛯⁐፹ᢳฟἲ䛷䝶䜴⣲䜢⃰⦰䛧䛯䚹䛭䛾ᚋ AgNO3 䜢ຍ䛘䚸AgI ỿẊ䜢⏕ᡂ䛧䚸ᮾி኱Ꮫ MALT䛻䛚䛔䛶ຍ㏿ჾ㉁㔞ศᯒ䛻䜘䜚 ᐃ䛧䛯䚹䛆⤖ᯝ䛇MR1404 ḟ⯟ᾏ䛻䛚䛡䜛⾲㠃ᾏỈ୰ 129I ⃰ᗘ䛿໭ᴟᾏ䠄79䜪N,162䜪W䠅䛷㧗䛟䚸໭ኴᖹὒ䚸䝧䞊䝸䞁䜾ᾏ䚸䝏䝱䜽䝏ᾏ༡㒊䛸ẚ䜉䜛䛸 10 ಸ㧗䛔⃰ᗘ䜢♧䛧䛯䚹໭ኴᖹὒ䠄47°N,160°E-131¶W䠅䛾㖄┤ศᕸ䛿⾲ᒙ䛷㧗䛟䚸῝ᒙ䛻䛔䛟䛻䛴䜜⃰ᗘ䛜ῶᑡ䛩䜛ഴྥ䛜ぢ䜙䜜䛯䚹MR1404 ḟ⯟ᾏ
St.73䠄47°N,160°E䠅䛸 KH-12-4 ḟ⯟ᾏ䠄2012 ᖺ 8 ᭶䠅䛾ྠ Ⅼ BD07 䛾 129I ⃰ᗘ䛾㖄┤ศᕸ[1]䛸ẚ
㍑䛩䜛䛸䚸⾲ᒙ 50m ௜㏆䜎䛷䛿 St.073 䛾 129I ⃰ᗘ䛜㧗䛟䚸100m ௨῝䛛䜙䛿 129I ⃰ᗘ䛜ῶᑡ䛧䚸
BD07 䛾 129I ⃰ᗘ䛾᪉䛜㧗䛔ศᕸ䜢♧䛧䚸᫬㛫⤒㐣䛻䜘䜛ኚື䛜ぢ䜙䜜䛯䚹໭ᴟᾏ䛻䛚䛡䜛 129I 㖄┤ศᕸ䛿䚸⾲ᒙ䠄0-100m䠅䜘䜚῝䛔ᒙ䛾᪉䛷 129I ⃰ᗘ䛜㧗䛔㖄┤ศᕸ䜢♧䛧䛯䠄ᅗ 1䠅䚹䛣䜜䛿 129I ⃰ᗘ䛾ప䛔ኴᖹὒỈ䛜䝧䞊䝸䞁䜾ᾏᓙ䜢㏻䜚䚸໭ᴟᾏ䛾ほ ᇦ䜎䛷㍺㏦䛥䜜䚸໭኱すὒ䛛䜙┤᥋㍺㏦
䛥䜜䛯 129I ⃰ᗘ䛾㧗䛔኱すὒỈ䛜ᕼ㔘䛥䜜䛯䛯䜑䛸⪃䛘䜙䜜䜛䚹䜎䛯 MR1405 ḟ⯟ᾏ St.009䠄75°N,162°W䠅䛸 2015 ᖺ 9 ᭶䛾ྠᾏᇦ䛾ほ Ⅼ䛷䛒䜛 MR1503 ḟ⯟ᾏ St.054-3䠄72°N,155°W䠅䜢ẚ
㍑䛧䛯䛸䛣䜝䚸2014 ᖺ䛿῝ᗘ 300m ௜㏆䛻ᴟ኱ᒙ䛜Ꮡᅾ䛧䛶䛔䜛
䛜 2015 ᖺ䛿῝ᗘ 200m ௜㏆䛻Ꮡᅾ䛧䛶䛔䛯䚹2015 ᖺ䛾 200m ௜㏆䛾ᾏỈᐦᗘ䛿 2014,2015 ᖺ䛾 300m ௨῝䛾ᐦᗘ䛸ྠ⛬ᗘ䛷䛒
䜚䚸129I ⃰ᗘ䛜ᴟ኱ᒙ䛾⃰ᗘ䛸ྠ⛬ᗘ䛷䛒䜛䛣䛸䛛䜙䚸2015 ᖺ䛾ほⅬ䛷䛿 129I ⃰ᗘ䛾㧗䛔኱すὒỈ䛜 200m ௨῝䛻Ꮡᅾ䛧䛶䛔䛯䛣䛸䛜䜟䛛䛳䛯䚹䜎䛯 2013-2015 䛾㛫䛷䚸129I 䜲䞁䝧䞁䝖䝸䜢ẚ㍑䛧
䛯䛸䛣䜝ᩘ䠂䛪䛴ቑຍ䛧䛶䛔䛯䚹໭኱すὒ䛛䜙໭ᴟᾏ䛾ᮏ◊✲䛾ᾏᇦ௜㏆䜈䛾ᾏỈ䛾㍺㏦᫬㛫䛿⣙ 7-30 ᖺ䛸䛥䜜䛶䛔䜛䛯䜑䚸129I
䛾୺䛺ᨺฟ※䛷䛒䜛Ḣᕞ䛾෌ฎ⌮ᕤሙ䛾 1990 ᖺ௦䛾ᨺฟ㔞䛾ቑຍ䛜䚸ほ ᾏᇦ䛾 129I ⃰ᗘ䛾ቑຍ䜢ᘬ䛝㉳䛣䛧䛯䛸⪃䛘䜙䜜䜛䚹[1] H.Nagai et al,(2015) Nucl.Instr.And Meth.B,361,p.680-684ᅗ 1 ໭ᴟᾏ࡟࠾ࡅࡿ 129I ࡢ㖄┤ศᕸ
Distribution of 129I concentration in the Arctic Ocean and North Pacific
KUDO, A., YAMAGATA, T., NAGAI, H., KUMAMOTO, Y., NISHINO, S., MATSUZAKI, H.

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P23

᪂₲┴ෆࡢ⎔ቃỈ୰ࢺࣜࢳ࣒࢘⃰ᗘࣞ࣋ࣝ
㸦᪂₲┴ᨺᑕ⥺┘どࢭࣥࢱ࣮㸧ࠐΎ㔝リᏊࠊ㬨ᕢ♸ஓࠊᒣ㷂⯆ᶞࠊ୸⏣ᩥஅ㻌㻌䛆⥴ゝ䛇㻌 ᪂₲┴࡟࠾ࡅࡿ⎔ቃ୰ࡢࢺࣜࢳ࣒࢘㸦3H㸧ࣞ࣋ࣝࢆᢕᥱࡍࡿࡓࡵ㸪┴ࡀ᯽ᓮส⩚ཎᏊຊⓎ㟁ᡤ࿘㎶⎔ቃᨺᑕ⥺┘どㄪᰝࢆᐇ᪋ࡋ࡚࠸ࡿ᯽ᓮส⩚ᆅᇦࢆ୰ᚰ࡟㸪㟁ゎ⃰⦰ἲ࡟ࡼࡾ㝆Ỉ㸪኱Ẽ㸪㝣Ỉ㸪ᾏỈࢆ ᐃࡋࡓ㸬䛆ヨᩱ䛇 2010㹼2014 ᖺᗘ࡟᥇ྲྀࡋࡓ᭶㛫㝆Ỉ 120 ヨᩱཬࡧ 1 ࠿᭶㛫㐃⥆ᤕ㞟ࡋࡓ኱Ẽ 120 ヨᩱ㸪୪ࡧ࡟ 2012㹼2014 ᖺᗘ࡟᥇ྲྀࡋࡓ㝣Ỉ 66 ヨᩱཬࡧᾏỈ 60 ヨᩱࢆศᯒࡋࡓ㸬䛆ศᯒ䛇3H ศᯒࡣᨺᑕ⬟ ᐃἲࢩ࣮ࣜࢬࠕࢺࣜࢳ࣒࢘ศᯒἲࠖ࡟ᚑࡗ࡚⾜ࡗࡓ㸬┘どㄪᰝ࡛ࡣῶ
ᅽ⵨␃ᚋࡢヨᩱ࡟ࡑࡢࡲࡲࢩࣥࢳ࣮ࣞࢱࢆຍ࠼࡚ΰྜࡋ㸪పࣂࢵࢡࢢࣛ࢘ࣥࢻᾮయࢩࣥࢳ࣮ࣞࢩ
ࣙࣥ࢝࢘ࣥࢱ࡛ ᐃࡋ࡚࠸ࡿࡀ㸪⌧ᅾࡢ⎔ቃỈ୰ࡢ 3H ⃰ᗘࡣప࡛ࣞ࣋ࣝ࠶ࡿࡓࡵ≉࡟ᾏỈヨᩱ࡟࠾࠸᳨࡚ฟୗ㝈್㸦⣙ 0.4Bq/L㸧ᮍ‶࡜࡞ࡿࡇ࡜ࡀከ࠸㸬ࡇࡢ◊✲࡛ࡣ඲࡚ࡢヨᩱ࡟ࡘ࠸࡚ῶᅽ⵨
␃ᚋ࡟㟁ゎ⃰⦰ࢆຍ࠼3H ⃰ᗘࢆ ᐃࡋࡓ㸬㟁ゎ⃰⦰ࡣ㸪ᅛయ㧗ศᏊ㟁ゎ㉁ࢆ⏝࠸ࡓ 3H 㟁ゎ⃰⦰⿦⨨࡛⵨␃ᚋࡢヨᩱỈ⣙ 300㹼1,000 mL ࢆ⣙ 50 mL ࡲ࡛⃰⦰ࡋࡓ㸬㍍Ỉ⣲Ỉࡀඃඛⓗ࡟ศゎࡍࡿࡓࡵ㸪ヨᩱỈ⣙ 1,000 mL ࢆ⣙ 50mL ࡲ࡛ῶᐜࡉࡏࡓ࡜ࡁࡢ 3H ࡢ⃰⦰ಸ⋡ࡣ⣙ 10 ಸ࡜࡞ࡿ㸬䛆⤖ᯝ䛇
2010㹼2014 ᖺᗘࡢ 5 ᖺ㛫ࡢᖹᆒ್ࡣ㸪㝆Ỉ୰⃰ᗘࡀ 0.53Bq/L㸪
(1) ᪂₲┴ෆࡢ⎔ቃỈ୰ࡢ 3H ⃰ᗘࡣ㸪኱ẼỈศ୰⃰ᗘࡀ 0.59Bq/L ཬࡧ኱Ẽ୰⃰ᗘࡀ 5.6Bq/m3 ࡛࠶ࡾ㸪2012㹼2014 ᖺᗘࡢ 3 ᖺ㛫ࡢᖹᆒ್࡛ࡣ㸪㝣Ỉ୰⃰ᗘࡣ 0.37Bq/L㸪ᾏỈ୰⃰ᗘࡣ 0.098 Bq/L ࡛࠶ࡗࡓ㸬(2) 㝆Ỉ୰⃰ᗘ࡟ࡣ 3㹼5 ᭶ࡢ᫓࡟㧗ࡃ 8㹼10 ᭶ࡢኟ࠿ࡽ⛅࡟ప࠸Ꮨ⠇ኚືࡀㄆࡵࡽࢀࡓ㸬(Fig.1)
(3) ኱Ẽ୰⃰ᗘࡣ 6䡚7 ᭶ࡢኟᏘ࡟㧗ࡃ㸪኱ẼỈศ୰⃰ᗘࡣ 4㹼5 ᭶ࡢ᫓Ꮨ࡟㧗ࡃ࡞ࡿᏘ⠇ኚືࡀㄆࡵࡽࢀࡓ㸬኱Ẽ୰⃰ᗘࡣ⤯ᑐ‵ᗘࡢᙳ㡪ࢆ኱ࡁࡃཷࡅࡿࡓࡵ㸪኱Ẽ୰࡟ྵࡲࢀࡿỈศ㔞ࡀከࡃ࡞ࡿኟᏘ࡟ቑຍࡍࡿ㸬኱ẼỈศ୰⃰ᗘࡣ㝆Ỉ୰⃰ᗘ࡜ࡼࡃఝࡓኚືࣃࢱ࣮࡛ࣥ࠶ࡗࡓ㸬(4) 㟁ゎ⃰⦰ࢆ⏝࠸ࡿࡇ࡜࡟ࡼࡾ㸪ప⃰ᗘ࡛࠶ࡿᾏỈ୰⃰ᗘࡶ☜ᐃࡍࡿࡇ࡜ࡀ࡛ࡁࡓ㸬(Fig.2)(5) ┴ෆࡢ 3H ࡟ࡼࡿෆ㒊⿕ࡤࡃ㸦㡸クᐇຠ⥺㔞㸧ࡣ㸪⤒ཱྀᦤྲྀ 6.4×10-6 mSv㸪྾ධᦤྲྀ 1.5×10-5 mSv
࡜ぢ✚ࡶࡽࢀ㸪ᖺ⥺㔞㝈ᗘ 1 mSv ࡜ẚ࡭ࡣࡿ࠿࡟ప࠸್࡛࠶ࡗࡓ㸬2

Kariwa0.3

Tritium Concentration in seawater(Bq/L)

Mothly tritium concentraion inprecipitation (Bq/L)

Niigata

0.2

1

0.1

2014

2012

2014

2013

2012

2011

2010

Fiscal Year

Fiscal Year

Fig.1 Tritium concentration in precipitation

2013

0

0

    

Recent levels of environmental tritium in Niigata prefecture
SEINO, U., KOHNOSU,Y.,YAMAZAKI, K., MARUTA, F.

- 103 -

Fig.2 Tritium concentration in seawaterග㐀ᙧ᪉ᘧ㸱㹂ࣉࣜࣥࢱ࡜ኳ↛ᨺᑕᛶ᰾✀ࢆ฼⏝ࡋࡓᶍᨃ࣐࢞ࣥ⥺※ࡢ㛤Ⓨ㸦ᑦ⤍Ꮫ㝔኱⏕ά⎔ቃ ࠊ᫂἞኱⌮ᕤ ࠊ኱㜰኱Ᏻ඲⾨⏕ 㸧‫ۑ‬す㛫ᮌ ྐ⧊ ࠊᑠụ ⿱ஓ ࠊ㧗ᶫ ㈼⮧ ࠊ㰺⸨ ᩗ 

3

࠙⥴ゝࠚ
ᨺᑕ⬟ࢆ࣐࢞ࣥ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺࣜ➼࡛ᐃ㔞ࡍࡿሙྜࠊ

ᐃࡍࡿヨᩱࡢᗄఱᏛⓗ࡞᮲௳ࡀ㠀ᖖ࡟㔜せ࡜࡞ࡿࠋࡑࡢࡓࡵࠊࡋࡤࡋࡤヨᩱࢆ◚ቯࡋ࡚ᗄఱᏛⓗ᮲௳ࢆྜࢃࡏࡓୖ࡛

ᐃࡍࡿࡇ࡜ࡶ

࠶ࡿࠋࡋ࠿ࡋࠊ㈗㔜࡞⪃ྂᏛ㈨ᩱ࡞࡝ࡣ࡛ࡁࢀࡤ㠀◚ቯ࡛ᨺᑕ⬟ࢆ ᐃࡍࡿࡇ࡜ࡀᮃࡲࡋ࠸ࠋ
ࡑࡇ࡛ࠊ㸱㹂ࢫ࢟ࣕࢼ࡜ග㐀ᙧ᪉ᘧ(SLA)㸱㹂ࣉࣜࣥࢱࢆ฼⏝ࡋ࡚ࠊᨺᑕ⬟ࢆᐃ㔞ࡍࡿࡓࡵࡢᶍ
ᨃ⥺※ࢆసᡂࡋࠊ ᐃࡍࡿ᪉ἲࢆ㛤Ⓨࡋࡓࠋ࠙ᐇ㦂᪉ἲࠚ
ヨᩱࡣྵࡲࢀ࡚࠸ࡿᨺᑕᛶ᰾✀(226Ra ࡜ 226Ra ࡢፉ᰾✀ࡢࡳ)ࡀ᫂ࡽ࠿࡛࠶ࡿ໭ᢞ▼ࢆ⏝࠸ࡓࠋࡣࡌࡵ࡟㸱㹂ࢫ࢟ࣕࢼ㸦㹋atter㸤㹄orm㸧ࢆ⏝࠸࡚໭ᢞ▼ࢆࢫ࢟ࣕࢽࣥࢢࡋࠊヨᩱࡢ㸱㹂ᙧ≧ࡢࢹ࣮ࢱࢆᚓࡓࠋࡉࡽ࡟ࢹ࣮ࢱ໬ࡋࡓ໭ᢞ▼ࣔࢹࣝࢆ㸱㹂㹁㹅ࢯࣇࢺ࢙࢘࢔㸦Shade 3D㸧ࢆ⏝࠸ࠊࣈ࣮ࣝ₇⟬ฎ⌮ࢆࡋ࡚໭ᢞ▼ࡢᙧ≧࡟ྜࢃࡏࡓพࡳࡢ࠶ࡿ෇ᰕᅗᙧࢆసᡂࡋࡓࠋࣔࢹࣜࣥࢢࡋࡓ
෇ᰕࡣࠊ⇕⁐ゎ✚ᒙᘧ㸱㹂ࣉࣜࣥࢱ㸦UP!Plus2㸧࡛ࣉࣜࣥࢺ࢔࢘ࢺࡋ࡚໭ᢞ▼ࡢ఩⨨ࢆྜࢃࡏࡿ
ࢪࢢ࡜ࡋ࡚⏝࠸ࡓࠋḟ࡟ࠊ㸱㹂ࣉࣜࣥࢱࡢග◳໬ᛶᶞ⬡࡟ኳ↛ᨺᑕᛶ≀㉁ࢆྵࡴ Lu2O3 ࢆΰࡐ㎸ࡳࠊࡣࡌࡵ࡟ᚓࡓ
໭ᢞ▼ࡢࢹ࣮ࢱࢆ SLA ࣉࣜࣥࢱ(Nobel1.0)࡛ࣉࣜࣥࢺ࢔࢘ࢺࡋ᪤▱ࡢᨺᑕ⬟ࡢᶍᨃ⥺※ࢆసᡂࡋࡓࠋ໭ᢞ▼࡜ᶍᨃ⥺※ࡣࡑࢀࡒࢀࢪࢢ࡟஌ࡏ࡚࣐࢞ࣥ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺࣜࢆ⾜࠸ࠊᚓࡽࢀࡓᨺᑕ
⬟࠿ࡽ᳨ฟຠ⋡᭤⥺ࢆᖹ⾜⛣ືࡉࡏᐇ㝿ࡢヨᩱࡢ᳨ฟຠ⋡ࢆồࡵࠊ໭ᢞ▼ࡢࣛࢪ࣒࢘⃰ᗘࢆ⟬ฟࡋࡓࠋ࠙⤖ᯝ࡜⪃ᐹࠚ
ᶍᨃ⥺※ࢆ⏝࠸࡚ồࡵࡓ໭ᢞ▼୰ࡢࣛࢪ࣒࢘⃰ᗘࡢ⤖ᯝࢆ Table ࡟ᥖࡆࡿࠋ
Table

Concentration of 226Ra in hokutolite calibrated by mock-up gamma-ray source

SampleWeight(g)Activity of 226Ra(Bq)Concentration of 226Ra(Bq/g)

No. 1

1.59

46.4 s 6.4

29.2 s 4.0

No. 2

7.15

252 s 2235.2 s 3.1

No. 3

7.23

247 s 1734.1 s 2.3

No. 4

9.99

434 s 3143.5 s 3.1

No. 5

12.24

766 s 4262.6 s 3.4

Table ࡼࡾ໭ᢞ▼ࡢࣛࢪ࣒࢘⃰ᗘࡣ 30㹼60Bq/g ࡛࠶ࡗࡓࠋ㐣ཤ࡟ሗ࿌ࡉࢀ࡚࠸ࡿ໭ᢞ▼ࡢࣛࢪ࣒࢘⃰ᗘࡣ 40㹼80Bq/g ࡛࠶ࡾࠊẚ㍑ⓗ㏆࠸್ࡀᚓࡽࢀࡓࠋࡇࢀࡼࡾ SLA ࣉࣜࣥࢱ࡜ኳ↛ᨺᑕᛶ᰾✀ࢆ⏝࠸ࠊ໭ᢞ▼୰ࡢᨺᑕ⬟⃰ᗘࡢ㠀◚ቯ ᐃࡀྍ⬟࡜࡞ࡗࡓࠋ
ࡋ࠿ࡋࠊග◳໬ᶞ⬡࡟ྵࡲࢀࡿ Lu2O3 ࡀᶍᨃ⥺※୰࡟࡝ࡢࡼ࠺࡟ศᕸࡋ࡚࠸ࡿ࠿ࡣࡲࡔࢃ࠿ࡗ
࡚࠸࡞࠸ࠋLu2O3 ࡣẚ㔜ࡀ㧗࠸ࡓࡵ◳໬๓ࡢᶞ⬡ࡢୗ᪉࡟ỿẊࡋ࡚࠸ࡿྍ⬟ᛶࡶ⪃࠼ࡽࢀࡿࠋࡑ
ࡇ࡛⌧ᅾ࢖࣓࣮ࢪࣥࢢࣉ࣮ࣞࢺࡸᏳᐃඖ⣲ࡢ ᐃࢆ⾜࠸ࠊᶍᨃヨᩱ୰ࡢ Lu2O3 ࡢศᕸ≧ἣࢆ☜ㄆ୰࡛࠶ࡿࠋDevelopment for mock-up gamma-ray source applied by SLA 3D printer and naturalradionuclide
NISHIMAGI, S., KOIKE, Y., TAKAHASHI, M., SAITO, T.
- 104 -

- 105 -P26

CO2 ࢞ࢫ࢖࢜ࣥ※ࢆ⏝࠸ࡓ㎿㏿ 14C-AMS ࡢ㛤Ⓨ⟃Ἴ኱ $06 ‫ۑ‬ᯇ୰ဴஓࠊ➲බ࿴ࠊ⣽㇂㟷ඣࠊ㧗ᶫດࠊᯇᮧ୓ᑑ⨾ࠊᮎᮌၨ௓

䛆⥴ゝ䛇ຍ㏿ჾ㉁㔞ศᯒἲ㸦Accelerator mass spectrometry: AMS㸧࡟࠾ࡅࡿ࢞ࢫ࢖࢜ࣥ※ࡣࠊᩘ gC ࠿ࡽᩘ mgC ࡢ CO2 ࡟ࡘ࠸࡚ࢢࣛࣇ࢓࢖ࢺฎ⌮ࢆᚲせ࡜ࡋ࡞࠸ 14C

ᐃࢆྍ⬟࡟ࡍࡿࡓࡵࠊ๓ฎ

⌮㎿㏿໬࡜ヨᩱᚤ㔞໬ࡢほⅬ࠿ࡽ฼Ⅼࡀ࠶ࡿࠋࢫࢥࢵࢺࣛࣥࢻ኱Ꮫ࡛ࡣࠊ࢞ࢫ࢖࢜ࣥ※ࢆ⏝࠸࡚ 12 PA ࡢ 12C–࢝ࣞࣥࢺࢆᘬࡁฟࡋࠊ214⛬ᗘࡢ⢭ᗘ㸦0.5%㸧࡛ C

gC – 1 mgC ࡢ CO2 ࡟ᑐࡋ࡚ࠊᅛయ࢖࢜ࣥ※࡜ྠᐃࢆᐇ᪋ࡋ࡚࠸ࡿࠋᅜෆ᪋タ࡟࠾࠸࡚࢞ࢫ࢖࢜ࣥ※ࢆ⏝࠸ࡓ 14C

ᐃᐇ⦼ࡣ↓ࡃࠊ㛤Ⓨࡀᛴࡀࢀ࡚࠸ࡿࠋ⟃Ἴ኱Ꮫ 6MV ࢱࣥࢹ࣒ຍ㏿ჾ࡟⿦ഛࡉࢀࡓ࢞ࢫ࢖࢜
ࣥ※ࠊ࢞ࢫࣁࣥࢻࣜࣥࢢࢩࢫࢸ࣒ࠊ⮬ື๓ฎ⌮⿦⨨ࢆ⏝࠸࡚㎿㏿ 14C

ᐃἲࡢ᳨ウࢆ⾜ࡗࡓࠋ䛆ᐇ㦂䛇࢞ࢫࣁࣥࢻࣜࣥࢢࢩࢫࢸ࣒࡟⿦ሸࡋࡓ㧗⣧ᗘ CO2 ࢆ࢞ࢫ࢖࢜ࣥ※ෆࡢ Ti ࢱ࣮ࢤࢵࢺ⾲㠃࡟ᑟ
ධࡋࠊ12C–ࡢ᭱኱࢝ࣞࣥࢺ࡜᭱㐺ὶ㔞ࢆㄪ࡭ࡓࠋ500 μgC ࡜ 1 mgC ࡟ㄪᩚࡋࡓ 14C ⃰ᗘࡢ␗࡞ࡿᶆ‽≀㉁㸦IAEA-C1ࠊC7ࠊNIST-HOxII㸧ࢆᑐ㇟࡟ࠊ⮬ື๓ฎ⌮⿦⨨ࢆ⏝࠸࡚ CO2 ࢆ⢭〇࣭ᑒ⟶ࡋࡓࠋCO2 ࢆ᭱㐺ὶ㔞࡛࢞ࢫ࢖࢜ࣥ※࡟ᑟධࡋࠊࢱࣥࢹ࣒ຍ㏿ჾ࡛ 14C/12C ࡜ 13C/12C ࢆィࡋࡓ㸦5 ศ ᅇ㸧ࠋࢱ࣮࣑ࢼࣝ㟁ᅽ 3.0 MV ࡢ᮲௳࡛ࠊ12 MeV ࡢ 14C3㸩ࢆǼE-E ࢞ࢫ᳨ฟჾ࡛ィᩘࡋࡓࠋヨᩱࡢ 13C ࢆ-25‰࡟つ᱁໬ࡋ࡚ྠ఩యศูຠᯝࢆ⿵ṇࡋࠊୗグᘧ࡟ࡼࡾ 14C⃰ᗘ㸦Percent modern carbon: pMC㸧ࢆ⟬ฟࡋࡓࠋࡲࡓᅛయ࢖࢜ࣥ※ࡢ 14C ᐃ⤖ᯝ࡜ẚ㍑ࡋࡓࠋ
14
13
C concentration (pMC) = 100((14C/12C sample – 14C/12C BKG) [1 – 2(25C sample) / 1000] )
14 12
14 12
13
/ (0.7459( C/ C HOX-II – C/ C BKG) [1 – 2(17.
C HOX-II ) / 1000] )䛆⤖ᯝ䛸⪃ᐹ䛇࢞ࢫࣁࣥࢻࣜࣥࢢࢩࢫࢸ࣒ࡢᅽຊࢆ 11 – 12 Torr ࡟タᐃࡋࠊCO2 ࢆ 1.6 μl min–1 ⛬ᗘ࡛࢞ࢫ࢖࢜
ࣥ※ෆࡢ Ti ࢱ࣮ࢤࢵࢺ࡟ᑟධࡍࡿࡇ࡜࡟ࡼࡗ࡚ 44 – 46 μA ࡢ᭱኱ 12C–࢝ࣞࣥࢺࡀᘬࡁฟࡉࢀ
ࡓ㸦ᅗ 1a㸧ࠋ࢞ࢫ࢖࢜ࣥ※࡟ࡼࡿ CO2 ࡢ 14C ⃰ᗘࡣࠊIAEA-C7 ࡛ 49.11s0.57 pMCࠊཬࡧ
NIST-HOxII ࡛ 132.14s1.14 pMC ࡜࡞ࡾࠊㄗᕪ⠊ᅖෆ࡛᥎ዡ್࡜୍⮴ࡋࡓ㸦ᅗ 1b㸧ࠋࡲࡓࠊ
NIST-HOxII ࡢ ᐃㄗᕪࡣ 0.6%࡛࠶ࡾࠊᅛయ࢖࢜ࣥ※ࡢ ᐃㄗᕪ㸦0.3%㸧ࡼࡾ㧗࠿ࡗࡓࠋ
IAEA-C1㸦BKG㸧ࡢ 14C ⃰ᗘࡣࠊ0.48s0.05 pMC㸦14C age: 42,920 ᖺ㸧࡛࠶ࡾࠊᅛయ࢖࢜ࣥ※ࡢ BKG㸦0.09s0.01 pMC㸧࡟ẚ࡭࡚㧗࠿ࡗࡓࠋ࢞ࢫ࢖࢜ࣥ※ࡣᅛయ࢖࢜ࣥ※࡟ẚ࡭࡚ ᐃㄗᕪ࡜ BKG ್ࡀࡸࡸ㧗࠸ࡀࠊᑡ࡞ࡃ࡜ࡶ 1 mgC ࡢ CO2 ヨᩱ࡟ࡘ࠸࡚ 14C ࡢ㎿㏿࣮ࣝࢳࣥ ᐃࢆྍ⬟࡟ࡍࡿࡇ࡜ࡀศ࠿ࡗࡓࠋ
–~1.6 Pl min 1㸦b㸧 ᅗ 1㸦a㸧࢞ࢫ࢖࢜ࣥ※࡟ᑟධࡍࡿ

㸦a㸧

CO2 ὶ㔞㸦ࣁࣥࢻࣜࣥࢢࢩࢫࢸ࣒ᅽ
ຊ㸧࡜ 12C̽࢝ࣞࣥࢺࡢ㛵ಀ㸦b㸧࢞ࢫ࢖࢜ࣥ※ࢆ⏝࠸ࡓᶆ‽≀㉁ࡢ 14Cᐃ⤖ᯝ㸦Ⅳ⣲㔞㸸1 mgC㸧Development of rapid 14C-AMS using CO2 gas ion source
MATSUNAKA, T., SASA, K., HOSOYA, S., TAKAHASHI, T., MATSUMURA, M., SUEKI, K.

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P27

ࣇ࣮ࣟ࢖ࣥࢪ࢙ࢡࢩࣙࣥศᯒἲࢆ฼⏝ࡋࡓ 4 ᪘ඖ⣲ Zr, Hf ࡢ࣮࢟ࣞࢺᢳฟ
᪂₲኱㝔⮬ ࠊ᪂₲኱⌮ ࠊ⌮◊ோ⛉ࢭ  ‫ۑ‬ᒣ⏣ுᖹ ࠊ኱Ụ୍ᘯ ࠊᚋ⸨┿୍ ࠊᕤ⸨ஂ᫛ ࠊ⩚ሙᏹග ࠊᑠ᳃᭷ᕼᏊ 

Distribution ratio䛆⥴ゝ䛇 ࡇࢀࡲ࡛ᡃࠎࡣࠊࣛࢨ࣮࣍ࢪ࣒࢘ (Rf) ࡢ࣮࢟ࣞࢺ㘒ᙧᡂࡢ◊✲࡟ྥࡅࠊࡑࡢྠ᪘ඖ
⣲࡛࠶ࡿࢪࣝࢥࢽ࣒࢘ (Zr)ࠊࣁࣇࢽ࣒࢘ (Hf) ࡢ⁐፹ᢳฟᣲືࢆ࣮࢟ࣞࢺᢳฟ๣࡛࠶ࡿࢸࣀ
࢖ࣝࢺࣜࣇࣝ࢜ࣟ࢔ࢭࢺࣥ (TTA) ཬࡧࢪ-2-࢚ࢳࣝ࣊࢟ࢩࣝࣜࣥ㓟 (HDEHP) ࢆ⏝࠸࡚ㄪᰝࡋ࡚ࡁࡓ[1, 2]ࠋࡋ࠿ࡋ࡞ࡀࡽࠊᢳฟᖹ⾮࡟㐩ࡍࡿࡲ࡛ᩘ༑ศせࡋ࡚࠾ࡾࠊ▷ᑑ࿨ࡢ Rf ࡢᐇ㦂࡛ࡣࠊࡼࡾ㎿㏿࡟ᢳฟࢆ⾜࠺ᚲせࡀ࠶ࡿࠋᮏ◊✲ᐊ࡛ࡣࠊࣇ࣮ࣟ࢖ࣥࢪ࢙ࢡࢩࣙࣥศᯒἲ(FIA)ࢆ฼⏝ࡋࡓ㎿㏿⁐፹ᢳฟ⿦⨨ࡢ㛤Ⓨࢆ㐍ࡵ࡚࠾ࡾ[3]ࠊ௒ᅇᮏ⿦⨨ࢆ TTA ཬࡧ HDEHP
࡟ࡼࡿ 4 ᪘ඖ⣲ࡢ࣮࢟ࣞࢺᢳฟ⣔࡟㐺⏝ࡋࠊᢳฟᖹ⾮࡟せࡍࡿ᮲௳ࡢ᳨ウࢆ⾜ࡗࡓࡢ࡛ሗ࿌
ࡍࡿࠋ䛆ᐇ㦂䛇 ⌮໬Ꮫ◊✲ᡤࡢ AVF ࢧ࢖ࢡࣟࢺࣟࣥࢆ⏝࠸ࠊ89Y ᶆⓗ࡜ natLu ᶆⓗ࡟㔜㝧Ꮚࣅ࣮࣒ࢆ
↷ᑕࡋࠊ88Zr (T1/2 = 83.4 d) ཬࡧ 175Hf (T1/2 = 70 d) ࢆ〇㐀ࡋࡓࠋ〇㐀ࡋࡓࢺ࣮ࣞࢧ࣮ࡣ㝜࢖࢜ࣥ஺᥮ἲ࡜ᾮᾮᢳฟἲ࡟ࡼࡾᶆⓗ࠿ࡽศ㞳ࠊ⢭〇ࡋࡓࠋỈ┦࡟ࡣ㐣ሷ⣲㓟ࡲࡓࡣ◪㓟⁐ᾮࢆࠊ᭷ᶵ┦࡟ࡣ TTA ࡲࡓࡣ HDEHP ࢆࢺ࢚ࣝࣥ࡟⁐ゎࡋࡓࡶࡢࢆ⏝࠸ࡓࠋࢲࣈࣝࣉࣛࣥࢪ࣮࣏ࣕ
ࣥࣉࢆ 2 ྎ⏝࠸࡚Ỉ┦࡜᭷ᶵ┦ࢆὶ㏿ 0.1 ~ 0.5 mL/min ࡛㏦ᾮࡋࠊࢧࣥࣉࣝ࢖ࣥࢪ࢙ࢡࢱ࣮ࢆ
⏝࠸࡚ࢺ࣮ࣞࢧ࣮ࢆྵࡴỈ┦ࢆᑟධࡋࡓࠋࡑࡢᚋࠊY Ꮠ୕᪉ࢪࣙ࢖ࣥࢺ࡛Ỉ┦࡜᭷ᶵ┦ࢆྜὶࡉࡏࠊ⥆࠸࡚ෆᚄ 0.17 mmࠊ㛗ࡉ 0.5 ~ 2.0 m ࡢᢳฟࢥ࢖ࣝෆ࡟࠾࠸࡚⁐፹ᢳฟࢆ⾜ࡗࡓࠋᢳฟࢥ࢖ࣝ࠿ࡽࡢ⁐ฟᾮࢆ୍ᐃ᫬㛫 1.5 mL ࣐࢖ࢡࣟࢳ࣮ࣗࣈ࡟ᤕ㞟ࡋࠊ㐲ᚰศ㞳ᚋ࡟ྛ┦ྠ㔞ศྲྀࡋࠊγ ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺ࣮ࣜ࠿ࡽ 88Zr, 175Hf ࡢศ㓄ẚࢆ⟬ฟࡋࡓࠋ䛆⤖ᯝ䛸⪃ᐹ䛇 FIA ⿦⨨ࢆ⏝࠸ࡓ 3 M 㐣ሷ⣲㓟-1.5×10-3 M HDEHP/ࢺ࢚ࣝࣥ࡟࠾ࡅࡿ 88Zr, 175Hfࡢศ㓄ẚ D ࡢ஧┦᥋ゐ᫬㛫౫Ꮡᛶࢆᅗ 1 ࡟101♧ࡍࠋᅗ 1 ࡼࡾࠊࣂࢵࢳᐇ㦂࡛ࡢᖹ⾮᫬ࡢ88
Zr, 175Hf ࡢศ㓄ẚ࡜ẚ࡭࡚௒ᅇᚓࡽࢀࡓ
ศ㓄ẚࡣⴭࡋࡃప࠸ࡇ࡜ࡀศ࠿ࡗࡓࠋࡇࡢ
100ࡇ࡜࠿ࡽࠊ௒ᅇࡢ᮲௳࡛ࡣ஧┦ࡢ᥋ゐ᫬㛫ࡀ㊊ࡾ࡞࠸➼࡟ࡼࡾࠊᢳฟࢥ࢖ࣝෆ࡛ࡣᢳ
ฟᖹ⾮࡟㐩ࡋ࡚࠸࡞࠸࡜⪃࠼ࡽࢀࡿࠋⓎ⾲
10-1࡛ࡣࠊᢳฟᖹ⾮࡟㐩ࡍࡿࡲ࡛ࡢ᮲௳ࡢ᳨ウ
:88
Zr
175
ࡸࠊ3 M ◪㓟-TTA/ࢺ࢚ࣝࣥ⣔࡟࠾ࡅࡿ⤖ᯝ: Hf࡟ࡘ࠸࡚ࡶሗ࿌ࡍࡿࠋ
10-2
0
5
10
15
[1] ⏣୰࡯࠿, ➨ 58 ᅇᨺᑕ໬Ꮫウㄽ఍,஧┦᥋ゐ᫬㛫 / s
P01, (ྡྂᒇ, 2014 ᖺ 9 ᭶).
ᅗ 1. FIA ⿦⨨ࢆ⏝࠸ࡓ 3 M 㐣ሷ⣲㓟-1.5×10-3[2] ᒣ⏣࡯࠿, ➨ 59 ᅇᨺᑕ໬Ꮫウㄽ఍,
P05, (௝ྎ, 2015 ᖺ 9 ᭶).
[3] ᑠᒣ࡯࠿, 5th Asia-Pacific Symposium onRadiochemistry’13 (APSORC 13),
25NCP05, (㔠ἑ, 2013 ᖺ 9 ᭶).

M HDEHP/ࢺ࢚ࣝࣥ࡟࠾ࡅࡿ 88Zr, 175Hf ࡢศ㓄ẚࡢ஧┦᥋ゐ᫬㛫౫Ꮡᛶࠋ◚⥺ࡣ Zrࠊᐇ⥺ࡣ Hf ࡢࣂࢵࢳᐇ㦂࡛ࡢศ㓄ẚࠋ

Chelate extraction of group 4 elements, Zr and Hf, using a flow injection analysis method
YAMADA, R., OOE, K., GOTO, S., KUDO, H., HABA, H., KOMORI, Y.

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

P28

Rf ࡢྠ᪘ඖ⣲ ZrࠊHf ࡢ 4-࢖ࢯࣉࣟࣆࣝࢺ࣏ࣟࣟࣥࢆ⏝࠸ࡓ⁐፹ᢳฟᣲື᪂₲኱㝔⮬ ࠊ᪂₲኱⌮ ࠊ⌮◊ோ⛉ࢭ ‫ۑ‬኱Ụ୍ᘯ ࠊᒣ⏣ுᖹ ࠊᚋ⸨┿୍ ࠊᕤ⸨ஂ᫛ ࠊ⩚ሙᏹග ࠊᑠ᳃᭷ᕼᏊ 䛆⥴ゝ䛇㻌 ᮏ◊✲࡛ࡣࠊ104 ␒ඖ⣲ࣛࢨ࣮࣍ࢪ࣒࢘ࡢ⁐ᾮ໬Ꮫ◊✲ࡢࡓࡵࠊྠ᪘ඖ⣲ Zr ࠾ࡼࡧ
Hf ࡢ࣮࢟ࣞࢺᢳฟ๣ࢆ⏝࠸ࡓ⁐፹ᢳฟᐇ㦂ࢆ㐍ࡵ࡚࠸ࡿ[1,2]ࠋࡇࢀࡲ࡛࡟ HTTA ࠾ࡼࡧ
HDEHP ࢆ⏝࠸ࠊZrࠊHf ࡢศ㓄ẚ(D)ࡢᢳฟ๣⃰ᗘ౫Ꮡᛶ࠿ࡽࡑࡢᢳฟᖹ⾮ࡢゎᯒࢆ⾜ࡗࡓ࡜ࡇࢁࠊM(TTA)4 ࡸ M[H(DEHP)2]4 (M = Zr, Hf)ࡀᢳฟࡉࢀ࡚࠸ࡿࡇ࡜ࡀ♧၀ࡉࢀࡓࠋࡋ࠿ࡋ࡞ࡀ
ࡽࠊHTTA ࡸ HDEHP ࡛ࡣࠊᢳฟᖹ⾮฿㐩ࡲ࡛࡟ᩘ༑ศ⛬ᗘࢆせࡋ࡚࠾ࡾࠊ▷ᑑ࿨࡛࠶ࡿ Rf
ࡢ໬Ꮫ◊✲࡟ࡣࡼࡾᖹ⾮฿㐩ࡢ㏿࠸ᢳฟ๣ࡢ฼⏝ࡀᮃࡲࡋ࠸ࠋࡇࢀࡲ࡛࡟ࠊ6 ᪘ඖ⣲ Mo ࠾ࡼࡧ W ࡢ⁐፹ᢳฟᐇ㦂࡟࠾࠸࡚ࠊ4-࢖ࢯࣉࣟࣆࣝࢺ࣏ࣟࣟࣥ(IPT)ࡀẚ㍑ⓗ㏿࠸ᖹ⾮฿㐩ࢆ♧ࡍࡇ࡜ࡀሗ࿌ࡉࢀ࡚࠾ࡾ[3]ࠊᮏ◊✲࡛ࡣ IPT ࡟ࡼࡿ ZrࠊHf ࡢ⁐፹ᢳฟ࡟࠾ࡅࡿᖹ⾮฿㐩᫬㛫࠾ࡼࡧᢳฟᖹ⾮࡟ࡘ࠸࡚ㄪᰝࡋࡓࠋ
䛆ᐇ㦂䛇㻌 㛗ᑑ࿨ᨺᑕᛶࢺ࣮ࣞࢧ࣮88Zr ࠾ࡼࡧ 175Hf ࢆࠊ⌮໬Ꮫ◊✲ᡤ AVF ࢧ࢖ࢡࣟࢺࣟࣥࢆ⏝࠸࡚〇㐀ࡋࠊ㝜࢖࢜ࣥ஺᥮ศ㞳࠾ࡼࡧ⁐፹ᢳฟศ㞳࡟ࡼࡾࢱ࣮ࢤࢵࢺ࠿ࡽ⢭〇ࡋ࡚฼⏝ࡋࡓࠋࡇࢀࡽࡢࢺ࣮ࣞࢧ࣮ࢆྵࡴ◲㓟⁐ᾮࢆࠊࢸࣇࣟࣥヨ㦂⟶ෆ࡟࠾࠸࡚ IPT-ࢺ࢚ࣝࣥ⁐ᾮ࡜ΰྜࡋࠊ25 ºC ࡟࠾࠸࡚᣺࡜࠺ࢆ⾜ࡗࡓࠋ㐲ᚰศ㞳ᚋࠊ஧┦ࢆูࠎ࡟ศྲྀࡋࠊྛ┦ࡢ γ ⥺ ᐃ࠿ࡽ
ZrࠊHf ࡢศ㓄ẚࡢ⟬ฟࢆ⾜ࡗࡓࠋ101䛆⤖ᯝ䛸⪃ᐹ䛇㻌 Fig. 1 ࡟ 3 M H2SO4 ࡟࠾ࡅࡿDistribution ratio

ZrࠊHf ࡢศ㓄ẚࡢ᣺࡜࠺᫬㛫౫Ꮡᛶࢆ♧ࡍࠋࡇࡢ⤖ᯝ࠿ࡽࠊZrࠊHf ࡜ࡶ࡟ 45 s ⛬ᗘ࡛ᖹ
⾮࡟฿㐩ࡍࡿࡇ࡜ࡀࢃ࠿ࡗࡓࠋࡲࡓࠊ0.1 M
H2SO4 ࡛ࡣᖹ⾮฿㐩ࡀ 4 min ⛬ᗘ࡜ࡸࡸ㐜ࡃ࡞ࡿࡶࡢࡢࠊࡇࢀࡽࡢ⤖ᯝࡣ TTA ࡸ
88
Zr
HDEHP ࡜ẚ㍑ࡋ࡚ᖹ⾮฿㐩᫬㛫ࡀ኱ᖜ࡟
175
Hf▷⦰ࡉࢀ࡚࠸ࡿࡇ࡜ࢆ♧ࡋ࡚࠾ࡾࠊᮏᢳฟ
0
10 0⣔ࡢ Rf ᐇ㦂࡬ࡢ㐺⏝ࡀᮇᚅࡉࢀࡿࠋᮏᢳฟ
10
101
102
103
104
105
Shaking time / s⣔࡟࠾ࡅࡿᢳฟᖹ⾮ࢆゎᯒࡍࡿࡓࡵࠊZrࠊ
Hf ࡢศ㓄ẚࡢ IPT ⃰ᗘ౫Ꮡᛶࢆㄪ࡭ࡓࠋࡑ Fig. 1. 88Zr ࠾ࡼࡧ 175Hf ࡢศ㓄ẚࡢ᣺࡜࠺᫬㛫ࡢ⤖ᯝࠊ0.1 M H2SO4 ⁐ᾮ࡛ࡣ ZrࠊHf ࡜ࡶ ౫Ꮡᛶ. Ỉ┦㸸3 M H SO ; ᭷ᶵ┦㸸1.9 × 10-3 M
2
4
log D vs. log [IPT] ࣉࣟࢵࢺࡢഴࡁࡀ࡯ࡰ 4
IPT-ࢺ࢚ࣝࣥ.
࡜࡞ࡾࠊ㔠ᒓ࢖࢜ࣥ࡟ IPT ࡀ 4 ࡘ㓄఩ࡋࡓ㘒యࡀᢳฟࡉࢀ࡚࠸ࡿࡇ࡜ࡀ♧၀ࡉࢀࡓࠋ
୍᪉࡛ࠊ3 M H2SO4 ࡛ࡣഴࡁࡀ 3.5 ⛬ᗘ࡜ᑠࡉࡃ࡞ࡿࡇ࡜ࡀࢃ࠿ࡗࡓࠋᢳฟᖹ⾮࡟◲㓟࢖࢜ࣥࡀᙳ㡪ࡋ࡚࠸ࡿྍ⬟ᛶ➼ࡀ⪃࠼ࡽࢀࠊ௒ᚋヲࡋࡃㄪ࡭࡚࠸ࡃᚲせࡀ࠶ࡿࠋ[1] ⏣୰ᙲࡽ㸪➨ 58 ᅇᨺᑕ໬Ꮫウㄽ఍㸪P01㸪2014 ᖺ 9 ᭶ 12 ᪥㸪ྡྂᒇ㸪(2014).
[2] ᒣ⏣ுᖹࡽ㸪➨ 59 ᅇᨺᑕ໬Ꮫウㄽ఍㸪P05㸪2015 ᖺ 9 ᭶ 26 ᪥㸪௝ྎ㸪(2015).
[3] ᐑୗ┤ࡽ㸪➨ 56 ᅇᨺᑕ໬Ꮫウㄽ఍㸪2B02㸪2012 ᖺ 10 ᭶ 4 ᪥㸪ᮾி㸪(2012).

Solvent extraction behavior of lighter homologs of rutherfordium, zirconium and hafnium, with
4-isopropyltropolone
OOE, K., YAMADA, R., GOTO, S., KUDO, H., HABA, H., KOMORI, Y.

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P29

5 ᪘ඖ⣲ Nb, Ta ࡢࣇࢵ໬Ỉ⣲㓟࠿ࡽࡢ Aliquat 336 ᶞ⬡࡬ࡢᢳฟ㸸ศ㓄ಀᩘࡢᢳฟ๣⃰ᗘ౫Ꮡᛶࡢ᳨ウ(1 ᪂₲኱㝔⮬↛ࠊ2 ⌮◊ோ⛉ࢭࠊ3 ཎᏊຊᶵᵓࠊ4 ᮾ໭኱㟁Ꮚගࢭࠊ5 ᪂₲኱⌮)۵ బ⸨኱㍜ 1ࠊᮧୖᫀྐ 1ࠊ኱Ụ୍ᘯ 1ࠊᮏᒣᮤἋ 1ࠊ⩚ሙᏹග 2ࠊᑠ᳃᭷ᕼᏊ 2ࠊ㇏ᔱཌྐ 3ࠊỈ㣫⛅⳯ 3ࠊ⳥Ọⱥᑑ 4ࠊᚋ⸨┿୍ 1ࠊᕤ⸨ஂ᫛ 5䛆⥴ゝ䛇㻌 ᮏ◊✲࡛ࡣ Db ࡢࣇࢵ໬≀㘒ᙧᡂࢆ᫂ࡽ࠿࡟ࡍࡿࡓࡵࠊࡇࢀࡲ࡛࡟ Db ࡢ㍍࠸ྠ᪘ඖ⣲࡛࠶ࡿ 95gNb, 179Ta ࢺ࣮ࣞࢧ࣮ࢆ⏝࠸࡚ࣇࢵ໬Ỉ⣲㓟⁐ᾮ࠿ࡽࡢ࢖࢜ࣥᑐᢳฟ๣ Aliquat 336࡟ࡼࡿ⁐፹ᢳฟᐇ㦂ࢆ⾜ࡗ࡚ࡁࡓ[1]ࠋࡲࡓࠊDb ࡢ໬Ꮫᐇ㦂࡛ࡣ⮬ື㎿㏿໬Ꮫ⿦⨨ ARCA ࢆ⏝࠸ࡓ㏫┦ࢡ࣐ࣟࢺࢢࣛࣇ࢕࣮ᐇ㦂ࢆ⾜࠺ணᐃ࡛࠶ࡾࠊAliquat 336 ࢆᢸᣢࡋࡓᶞ⬡ࢆㄪ〇ࡋࠊࣂࢵࢳἲ࡟ࡼࡿࣇࢵ໬Ỉ⣲㓟⁐ᾮ࠿ࡽࡢ Nb, Ta ࡢᅛᾮᢳฟᐇ㦂ࡶ⾜ࡗࡓ[2]ࠋࡋ࠿ࡋࠊ⁐፹ᢳฟᐇ㦂࡟࠾ࡅࡿࣇࢵ໬Ỉ⣲㓟⃰ᗘ࡟ᑐࡍࡿ Nb ࡢᢳฟᣲືࡀᅛᾮᢳฟᐇ㦂࡜␗࡞ࡗ࡚࠸ࡓࡇ
࡜࠿ࡽࠊ୧⪅࡟࠾ࡅࡿ Nb ࡢᢳฟ㘒యࡀ␗࡞ࡗ࡚࠸ࡿྍ⬟ᛶࡀ♧၀ࡉࢀࡓࠋࡑࡇ࡛௒ᅇࠊNb, Taࡢศ㓄ಀᩘࡢᶞ⬡୰ࡢ Aliquat 336 ᢸᣢ㔞౫Ꮡᛶࢆㄪᰝࡍࡿࡇ࡜࡛ࠊᶞ⬡࡟྾╔ࡋ࡚࠸ࡿ㝜࢖࢜ࣥ㘒య࡟㛵ࡍࡿ᝟ሗࢆྲྀᚓ࡛ࡁ࡞࠸࠿᳨ウࡋࡓࠋ䛆ᐇ㦂䛇㻌 ᐇ㦂࡟⏝࠸ࡓ 95gNb(T1/2=35 d)࡜ 179Ta(T1/2=665 d)ࡣ⌮◊ࡢ AVF ࢧ࢖ࢡࣟࢺࣟࣥࢆ⏝࠸࡚ Zr, Hf ࡢ㔠ᒓ⟩ᶆⓗ࡟㔜㝧Ꮚࢆ↷ᑕࡋ࡚〇㐀ࡋࠊ㝜࢖࢜ࣥ஺᥮ἲ࡟ࡼࡾᶆⓗ࠿ࡽศ㞳ࡋ౑⏝ࡋࡓࠋྛࢺ࣮ࣞࢧ࣮ࢆྵࡴ✀ࠎࡢ⃰ᗘࡢࣇࢵ໬Ỉ⣲㓟 400 μL ࡜ Aliquat 336 ᶞ⬡ 10-15 mgࢆᐜჾෆ࡟ධࢀࠊ୍ᐃ᫬㛫᣺┞ࡋࡓࡢࡕ┦ศ㞳ࢆ⾜ࡗࡓࠋ┦ศ㞳ᚋࡢྛࢧࣥࣉࣝ࠿ࡽỈ┦ࢆࡑࢀࡒࢀ 250 μL ࡎࡘศྲྀࡋࠊGe ༙ᑟయ᳨ฟჾ࡛ᨺᑕ⬟ࢆ ᐃࡋࠊศ㓄ಀᩘ Kd ࢆ⟬ฟࡋࡓࠋ
࡞࠾ࠊAliquat 336 ᶞ⬡ࢆධࢀࡎ࡟ᑐ↷᧯సࢆ⾜ࡗࡓࢧࣥࣉࣝࢆึᮇᨺᑕ⬟࡜ࡋࠊᶞ⬡୰ࡢᨺᑕ⬟ࡣึᮇᨺᑕ⬟࠿ࡽᶞ⬡ࡢධࡗࡓࢧࣥࣉࣝࡢỈ┦ࡢᨺᑕ⬟ࢆᕪࡋᘬࡃࡇ࡜࡛ồࡵࡓࠋ䛆⤖ᯝ䛸⪃ᐹ䛇㻌 ⤖ᯝࡢ୍౛࡜ࡋ࡚ࠊNb, Ta ࡢ Kd ್
ࡢ Aliquat 336 ᢸᣢ㔞౫Ꮡᛶࢆ 10 M ࣇࢵ໬Ỉ⣲㓟࡟࠾࠸࡚ㄪ࡭ࡓ⤖ᯝࢆᅗ 1 ࡟♧ࡍࠋᅗ 1 ࠿ࡽࠊ
Nb, Ta ࡜ࡶ࡟┤⥺㛵ಀࡀࡑࢀࡒࢀᚓࡽࢀࡓࠋ⁐፹ᢳฟᐇ㦂࡛ࡣ Nb, Ta ࡜ࡶ࡟㸫1 ౯ࡢ㝜࢖࢜ࣥ㘒యࡀᢳฟࡉࢀ࡚࠸ࡓࡀ[1]ࠊ௒ᅇᚓࡽࢀࡓᅗ 1 ࡢ⤖ᯝ࡜ẚ㍑ࡍࡿ࡜ࠊᅛᾮᢳฟᐇ㦂࡛ࡣ Nb ࡢᢳฟ໬Ꮫ✀ࡣ㸫1 ౯ࡢ㝜࢖࢜ࣥ㘒య࡜ࡣ␗࡞ࡿྍ⬟ᛶࡀ⪃࠼ࡽࢀࡿࠋᅛᾮᢳฟᐇ㦂࡟࠾ࡅࡿᐇ㝿ࡢᢳฟ໬Ꮫ✀࡟ࡘ࠸࡚ࡣࠊ௒ᚋࠊูࡢ᪉ἲ࡛ᐇ㦂ࢆ⾜ᅗ 1:10 M HF ࡟࠾ࡅࡿ 95gNb, 179Ta ࡢ࠸ࠊࡼࡾヲ⣽࡟ㄪᰝࡍࡿᚲせࡀ࠶ࡿࠋⓎ⾲࡛ࡣࠊศ㓄ಀᩘ Kd ࡢ Aliquat 336 ᢸᣢ㔞౫Ꮡᛶ␗࡞ࡿࣇࢵ໬Ỉ⣲㓟⃰ᗘ࡛ࡢ⤖ᯝ࡜࡜ࡶ࡟ࠊࡇࢀ
ࡲ࡛ࡢ⁐፹ᢳฟ࡟ࡼࡿᢳฟ໬Ꮫ✀ࡢ㆟ㄽ࡜ేࡏ࡚ࠊᮏᡭἲࡢ Db ᐇ㦂࡬ࡢ㐺⏝ࡢྍ⬟ᛶࢆ᳨ウࡍࡿࠋ
[1] బ⸨኱㍜࡯࠿, ➨ 58 ᅇᨺᑕ໬Ꮫウㄽ఍ 1A10 (ྡྂᒇ኱Ꮫ, 2014).
[2] బ⸨኱㍜࡯࠿, ➨ 59 ᅇᨺᑕ໬Ꮫウㄽ఍ P07 (ᮾ໭኱Ꮫ, 2015).
Extraction of group-5 elements, Nb and Ta, from HF solutions into Aliquat 336 resin:
dependence of the distribution coefficients on the extractant concentration
SATO, D., MURAKAMI, M., OOE, K., MOTOYAMA, R., HABA, H., KOMORI, Y.,
TOYOSHIMA, A., MITSUKAI, A., KIKUNAGA, H., GOTO, S., KUDO, H.

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P30

5 ᪘ඖ⣲ Nb, Ta ࡢሷ㓟⁐ᾮ࠿ࡽࡢࢺࣜ࢖ࢯ࢜ࢡࢳࣝ࢔࣑ࣥ࡟ࡼࡿ
⁐፹ᢳฟ ―Ta ࢺ࣮ࣞࢧ࣮ㄪ〇ἲࡢᙳ㡪―᪂₲኱㝔⮬ ࠊཎᏊຊᶵᵓ ࠊ⌮◊ோ⛉ࢭ ࠊ᪂₲኱⌮  ‫ۑ‬ᮏᒣᮤἋ ࠊ኱Ụ୍ᘯ ࠊᮧୖᫀྐ ࠊ⩚ሙᏹග ࠊᚋ⸨┿୍ ࠊᕤ⸨ஂ᫛ D䛆⥴ゝ䛇 ᮏ◊✲࡛ࡣࠊ105 ␒ඖ⣲ࢻࣈࢽ࣒࢘ (Db) ࡢሷ໬≀࢖࢜ࣥ࡜ࡢ㘒ᙧᡂᶵᵓࡢゎ᫂ࢆ┠ᣦࡋࠊྠ᪘ඖ⣲ Nb, Ta ࡢሷ㓟⁐ᾮ࠿ࡽࡢࢺࣜ࢖ࢯ࢜ࢡࢳࣝ࢔࣑ࣥ (TiOA) ࡟ࡼࡿ⁐፹ᢳฟࢆ⾜ࡗ࡚ࡁࡓࠋࡇࢀࡲ࡛࡟ࠊTa ࡼࡾࡶ Nb ࡢᢳฟ⋡ࡀ㧗ࡃ࡞ࡿࡇ࡜ࡀࢃ࠿ࡗࡓࡀࠊNb ࡀ࣐ࢡࣟ㔞࡛ࡢᐇ㦂࡟࠾࠸࡚ሗ࿌ࡉࢀ࡚࠸ࡿ್[1]࡜࠾࠾ࡼࡑ୍⮴ࡍࡿ୍᪉࡛ࠊTa ࡟㛵ࡋ࡚ࡣᩥ⊩್ࢆୖᅇࡿศ㓄ẚࡀᚓࡽࢀࡓࠋࡲࡓࠊ⃰ሷ㓟୰࡟ಖᏑࡋࡓ Ta ࢺ࣮ࣞࢧ࣮ࢆ⏝࠸ࡓ⁐፹ᢳฟᐇ㦂࡟࠾࠸࡚ࠊ⃰ሷ㓟୰࡬ࡢಖᏑᮇ㛫ࡢ⤒㐣࡜࡜ࡶ࡟ศ㓄ẚࡀపୗࡍࡿࡇ࡜ࡀࢃ࠿ࡗࡓࠋᩥ⊩್ࢆୖᅇࡿ Ta ࡢศ㓄ẚࡢཎᅉ࡜ࡋ࡚ F㸫࢖࢜ࣥࡢᙳ㡪ࡀ⪃࠼ࡽࢀࡓࡓࡵࠊ✀ࠎࡢ Ta ࢺ࣮ࣞࢧ࣮ㄪ
〇ἲ࡟ࡼࡿ F㸫࢖࢜ࣥࡢ㝖ཤࢆヨࡳࡓࠋࡲࡓࠊ࣐ࢡࣟ㔞࡛ࡢሗ࿌࡜ẚ㍑ࡍࡿࡓࡵࠊᢸయࢆῧຍ
ࡋࡓ⤖ᯝ࡟ࡘ࠸࡚ࡶሗ࿌ࡍࡿࠋ
䛆ᐇ㦂䛇 ⌮◊ AVF ࢧ࢖ࢡࣟࢺࣟࣥ࡟࡚ natZr(d,xn), natHf(d,xn)཯ᛂ࡟ࡼࡗ࡚ 95gNb (T1/2 = 34.991 d),
179
Ta (T1/2 = 1.82 y) ࢺ࣮ࣞࢧ࣮ࢆ〇㐀ࡋࠊ㝜࢖࢜ࣥ஺᥮ศ㞳࡟ࡼࡾ⢭〇ࡋࡓࠋ⢭〇ࡋࡓࢺ࣮ࣞ
ࢧ࣮ࡣ 1 M HF ⁐ᾮ୰࡟ಖᏑ (ࢫࢺࢵࢡࢯ࣮ࣜࣗࢩࣙࣥ) ࡋࠊᐇ㦂࡟⏝࠸ࡿ㝿ࡣ୍᪦⵨Ⓨ஝ᅛ
ࡉࡏࠊHF ࠾ࡼࡧ⃰ሷ㓟࡟ࡼࡿ஝ᅛ➼ࢆ⾜ࡗ࡚࠿ࡽ┠ⓗ⃰ᗘࡢሷ㓟⁐ᾮ࡟⁐ゎࡉࡏ࡚౑⏝ࡋࡓࠋᢸయῧຍࡢ㝿ࡣࢫࢺࢵࢡࢯ࣮ࣜࣗࢩࣙࣥ࡜࡜ࡶ࡟⵨Ⓨ஝ᅛࡉࡏࠊ㔠ᒓ࢖࢜ࣥ⃰ᗘࡀ 10㸫4 M ⛬ᗘ࡜࡞ࡿࡼ࠺࡟ㄪ〇ࡋࡓࠋࢺ࣮ࣞࢧ࣮ࢆྵࡴሷ㓟⁐ᾮ࡜ࠊTiOA/࢟ࢩࣞࣥ⁐ᾮࡢ➼㔞ࢆ࣏ࣜࣉࣟࣆࣞࣥヨ㦂⟶ෆ࡛ΰྜࡋࠊ25 Υ࡟タᐃࡋࡓᜏ ᵴ୰୍࡛ᐃ᫬㛫᣺┞ࡋࡓࠋ㐲ᚰศ㞳ᚋࠊྛ┦ࢆ୍ᐃ㔞ศྲྀࡋࠊGe ༙ᑟయ᳨ฟჾ࡛ X ⥺࠾ࡼࡧ γ ⥺ࡢ ᐃࢆ⾜࠸ࠊỈ┦࡜᭷ᶵ┦ࡢᨺᑕ⬟ẚࡼࡾศ㓄ẚ D ࢆ⟬ฟࡋࡓࠋᢸయࡢࡳࡢ Ta ࡢᐃ㔞࡟ࡣ ICP-AES ࢆ⏝࠸ࡓࠋ䛆⤖ᯝ䛸⪃ᐹ䛇 ᅗ 1 ࡟ࠊ179Ta ࢫࢺࢵࢡࢯ࣮ࣜࣗࢩࣙࣥ
104
㸸carrier free
㸸95g Nb (ᐇ㦂್)㸸carrier added
㸸Ta (ᩥ⊩್)103
ࢆ⵨Ⓨ஝ᅛᚋࠊࡑࡢࡲࡲሷ㓟⁐ᾮ࡟⁐ゎࡉࡏࡓሙྜ
102(1)࡜ࠊHF ⁐ᾮࢆຍ࠼࡚஝ᅛࡉࡏࠊࡉࡽ࡟⃰ሷ㓟ࢆ
101ຍ࠼࡚஝ᅛࡉࡏࡿ᧯సࢆ 2 ᅇ⾜ࡗࡓᚋࠊሷ㓟⁐ᾮ࡟
100⁐ゎࡉࡏࡓሙྜ (2) ࡟ᚓࡽࢀࡓศ㓄ẚࢆ♧ࡍࠋỈ┦10-1
࡟ࡣ 10 M HClࠊ᭷ᶵ┦࡟ࡣ 0.12 M TiOA/࢟ࢩࣞࣥ⁐10-2ᾮࢆ⏝࠸ࡓࠋHF ࠾ࡼࡧ⃰ሷ㓟࡟ࡼࡿ஝ᅛࢆ⾜࠺ࡇ10-3࡜࡛ศ㓄ẚࡣపୗࡋࡓࡀࠊ౫↛࡜ࡋ࡚ᩥ⊩್ࢆୖᅇ
10-4
1
2
3
4
ࡿ್࡜࡞ࡗࡓࠋ࣐ࢡࣟ㔞࡛ࡢᣲືࢆ☜ㄆࡍࡿࡓࡵࠊ
Sample number
ᢸయ (TaCl5 ⃰ሷ㓟⁐ᾮ) ࢆῧຍࡋࠊ↓ᢸయࡢሙྜ࡜
 ᅗ 1㸬ᢸయࡢ᭷↓࠾ࡼࡧㄪ〇ἲࡢ㐪࠸࡟ࡼࡿ 179Ta ศ㓄ẚࡢẚ㍑ࠋ
ྠᵝࡢㄪ〇ࢆ⾜ࡗࡓ⤖ᯝࡶᅗ 1 (3, 4) ࡟♧ࡍࠋ࡝ࡕࡽࡢ᮲௳࡛ࡶᢸయࢆῧຍࡋࡓሙྜ࡟ศ㓄ẚࡀపୗࡍࡿࡇ࡜ࡀࢃ࠿ࡗࡓࠋࡲࡓࠊHF ࠾ࡼࡧ⃰ሷ㓟࡟ࡼࡿ஝ᅛࢆ⾜ࡗࡓሙྜ (4) ࡟ࡣᩥ⊩್ࢆୗᅇࡿศ㓄ẚࡀᚓࡽࢀࡓࠋࡇࢀࡽࡢࡇ࡜࠿ࡽࠊ
ᢸయࢆῧຍࡋࡓሙྜ࡜ẚ࡭࡚↓ᢸయࡢ≧ែ࠿ࡽ F㸫࢖࢜ࣥࡢᙳ㡪ࢆྲྀࡾ㝖ࡃࡇ࡜ࡣᅔ㞴࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ⌧ᅾࠊᢸయ࡜ࢺ࣮ࣞࢧ࣮㛫ࡢᣲືࡢ㐪࠸ࢆ☜ㄆࡍࡿࡓࡵࠊᢸయࡢࡳࡢᣲື
࡟ࡘ࠸࡚ㄪᰝࢆ㐍ࡵ࡚࠸ࡿ࡜ࡇࢁ࡛࠶ࡿࡢ࡛ࠊࡑࡢ⤖ᯝࡶྜࢃࡏ࡚Ⓨ⾲ࡍࡿࠋ[1] T. Ishimori et al., ᪥ᮏཎᏊຊᏛ఍ㄅ 3, 698 (1961).

Solvent extraction of Nb and Ta with triisooctyl amine from hydrochloric acid solution̿Effect of the
preparation method of Ta tracer̿
MOTOYAMA, R., OOE, K., MURAKAMI, M., HABA, H., GOTO, S., KUDO, H.

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P31ࣇ࣮ࣟᢳฟ⿦⨨ࢆ⏝࠸ࡓࣇࢵ໬Ỉ⣲㓟-Aliquat336 ⣔࡟࠾ࡅࡿࢱࣥࢢࢫ
ࢸࣥࡢ⁐፹ᢳฟ
(Ⲉ኱㝔⌮ᕤࠊཎᏊຊᶵᵓࠊ⌮◊ோ⛉ࢭ)‫ۑ‬Ỉ㣫⛅⳯,2ࠊ㇏ᔱཌྐࠊ
ᑠ᳃᭷ᕼᏊࠊ⩚ሙᏹගࠊὸ஭㞞ேࠊሯ⏣࿴᫂ࠊబ⸨ဴஓࠊỌ┠ㅍ୍㑻,2࠙⥴ゝࠚ ᡃࠎࡣࡇࢀࡲ࡛106␒ඖ⣲ࢩ࣮࣮࣎ࢠ࣒࢘(Sg)ࡢ㘒ᙧᡂ཯ᛂࢆㄪ࡭ࡿࡓࡵࠊ㍍ྠ᪘
ඖ⣲࡛࠶ࡿࣔࣜࣈࢹࣥ(Mo)࡜ࢱࣥࢢࢫࢸࣥ(W)ࢆ⏝࠸ࡓ⁐ᾮ໬Ꮫᐇ㦂ࢆ⾜ࡗ࡚ࡁࡓࠋࣇࢵ໬≀㘒ᙧᡂ࡟࠾࠸࡚ࡣ୰ᚰ㔠ᒓࡢ࢖༙࢜ࣥᚄࡀᨭ㓄ⓗ࡜࡞ࡿࡀࠊMoࡸWࡼࡾ࢖༙࢜ࣥᚄࡀ኱ࡁ࠸
࡜ணࡉࢀ࡚࠸ࡿSgࡣࡼࡾ㘒ᙧᡂࡋ࡟ࡃ࠸࡜⪃࠼ࡽࢀࡿࠋࡑࡢࡓࡵࠊSgࡢ㘒ᙧᡂࢆᐇ㦂ⓗ࡟᫂ࡽ࠿࡟ࡍࡿࡇ࡜࡛ࠊࡑࡢ࢖༙࢜ࣥᚄ࡟㛵ࡍࡿ᝟ሗࡀᚓࡽࢀࡿ࡜ᮇᚅ࡛ࡁࡿࠋࡋ࠿ࡋ࡞ࡀࡽࠊ
248

Cm(22Ne, 5n)265a,bSg཯ᛂ࡛ྜᡂࡉࢀࡿ265Sgࡣ༙ῶᮇࡀ⣙10⛊࡜㠀ᖖ࡟▷ࡃࠊ⏕ᡂ᩿㠃✚ࡶᴟࡵ࡚ᑠࡉ࠸ࡓࡵࠊ㎿㏿࡞໬Ꮫᐇ㦂⿦⨨ࡢ㛤Ⓨ࡞ࡽࡧ࡟᪩࠸ᢳฟ཯ᛂ᮲௳ࡢ᥈⣴ࡀᚲせ࡛࠶ࡿࠋᮏ◊✲࡛ࡣࠊ໬Ꮫศ㞳࠿ࡽα⥺ ᐃࡲ࡛ࢆ㐃⥆ⓗ࡟⾜࠺ᢳฟศ㞳⿦⨨FSE (Flow Solvent Extractor)㛤Ⓨࡢ୍➃࡜ࡋ࡚ࠊWࡢࣇࢵ໬Ỉ⣲㓟/ሷ㓟(HF/HCl)ࡢΰ㓟୰࠿ࡽ࢔࣑ࣥᢳฟ๣࡛࠶ࡿAliquat336࡬ࡢ⁐፹ᢳฟᣲືࢆㄪ࡭ࡓࠋ

࠙ᐇ㦂ࠚ ⌮◊ AVF ࢧ࢖ࢡࣟࢺࣟࣥ࡟࠾࠸࡚ 181Ta(d, 2n)181W ཯ᛂ࡟ࡼࡾ 181W (T1/2 = 121.8 d)ࢆྜᡂࡋࡓࠋ
ཎᏊຊᶵᵓ࡟࠾࠸࡚࢖࢜ࣥ஺᥮ἲࢆ⏝࠸࡚ Ta ᶆⓗ࠿ࡽ 181W ࡢศ㞳ࢆ⾜ࡗࡓᚋࠊ10-4 M HF / 1 M HCl ⁐ᾮ࡟⁐ゎࡋࠊࢫࢺࢵࢡ⁐ᾮ࡜ࡋࡓࠋࡇࡢࢫࢺࢵࢡ⁐ᾮ 10 μL ࢆྵࡴ 10-4
– 1 M HF/ 1 M HCl ⁐ᾮ 700 μL ࡟ྠయ✚ࡢ 0.2 M Aliquat336-ࢺ࢚ࣝࣥ⁐ᾮࢆຍ࠼࡚ 10 ศ㛫᣺࡜࠺ࡋࡓࠋ30 ⛊㛫ࡢ㐲ᚰศ㞳ᚋࠊྛ┦ 500 μL ࡎࡘࢆศྲྀࡋࠊGe ᳨ฟჾ࡛ X ⥺ ᐃࢆ⾜ࡗࡓࠋศ㓄ẚ D ࡣ᭷ᶵ┦࡜Ỉ┦୰࡟ྵࡲࢀࡿ 181W ࡢ⃰ᗘẚ (D = (Aorg / Vorg) / (Aaq / Vaq)ࠊAorg, Aaq : ᨺᑕ⬟, Vorg, Vaq: య✚)࡜ࡋ࡚ᐃ⩏ࡋࡓࠋ
2
10[Aliquat336] = 0.2 M
1

10

D

࠙⤖ᯝ࡜⪃ᐹࠚ ࡲࡎࠊ᣺࡜࠺᫬㛫Ỵᐃࡢࡓ
ࡵࠊ10-4 – 1 M HF/ 1 M HCl ⁐ᾮ࡟࠾࠸࡚᣺
࡜࠺᫬㛫ࢆ 1 ศ࠿ࡽ 30 ศࡲ࡛ኚ໬ࡉࡏࡓࠋ
ࡑࡢ⤖ᯝࠊࡑࢀࡒࢀࡢ⃰ᗘ࡟࠾࠸࡚ 10 ศ௨ෆ࡛ᢳฟᖹ⾮࡬฿㐩ࡋ࡚࠸ࡿࡇ࡜ࡀศ࠿ࡗ
ࡓࠋḟ࡟ࠊᢳฟࡉࢀࡿ໬Ꮫ✀ࡢ᝟ሗࢆᚓࡿ
ࡓࡵࠊD ್ࡢ HF ⃰ᗘ౫Ꮡᛶ࡟ࡘ࠸࡚ㄪ࡭
ࡓࠋࡑࡢ⤖ᯝࢆ Fig.1 ࡟♧ࡍࠋHF ⃰ᗘࡀ 10-2
M ௨ୖ࡛ D ್ࡀᛴ⃭࡟ቑຍࡋ࡚࠸ࡿࡇ࡜ࡀ
ࢃ࠿ࡿࠋࡇࢀࡣ HF ⃰ᗘࡀ 10-2 M ௨ୖ࡛㝜࢖࢜ࣥࣇࢵ໬≀㘒యࡀᙧᡂࡋࠊᢳฟࡉࢀ࡚
࠸ࡿࡇ࡜ࢆ♧၀ࡋ࡚࠸ࡿࠋウㄽ఍࡛ࡣ D ್ࡢᢳฟ๣⃰ᗘ౫Ꮡᛶࡸ㎿㏿⁐፹ᢳฟ⿦⨨ࢆ⏝࠸ࡓࣇ࣮ࣟᐇ㦂ࡢ⤖ᯝ࡟ࡘ࠸࡚ࡶⓎ⾲ࡍ
ࡿࠋ

0

10

10

-1

10

-2
-5

10

-4

10

10

-3

10

-2

[HF] / M

10

-1

10

0

10

Fig.1. Variation of D values of W as a functionof F- concentration ([HF]) at [HCl] = 1 M.

Solvent extraction of W in the HF-Aliquat336 solution systems using a flow solvent extractor
MITSUKAI, A., TOYOSHIMA, A., KOMORI, Y., HABA, H., ASAI, M., TSUKADA, K., SATO, T.K.,
NAGAME, Y.

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1

P32࢔ࢫࢱࢳࣥࡢ㓟໬㑏ඖ࡜⁐፹ᢳฟᣲື
ཎᏊຊᶵᵓඛ➃◊ ࠊ㜰኱㝔⌮ ࠊ⌮◊ோ⛉ࢭ ࠊ㜰኱⌮ ࠊ㜰኱ 5, ࢭ  ‫ۑ‬㇏ᔱཌྐ ࠊ⚄⏣᫭඘ ࠊụ⏣༟ᾏ ࠊྜྷᮧᓫ ࠊ⠛ཎཌ ࠊ▮⣡ៅஓ ࠊᑠ᳃᭷ᕼᏊ ࠊ⩚ሙᏹග 䛆⥴ゝ䛇㻌 ➨ 17 ᪘ඖ⣲࡛࠶ࡿ࢔ࢫࢱࢳࣥ㸦At㸧ࡣࠊỈ⁐ᾮ୰࡛ᵝࠎ࡞㓟໬≧ែࢆ࡜ࡿ஦ࡀ▱ࡽࢀ࡚࠸ࡿ [1-3]ࠋࡲࡓࠊྠ᪘࡛࠶ࡿࣚ࢘⣲ࡼࡾࡶ㓟໬ࡉࢀࡸࡍࡃࠊỈ⁐ᾮ⣔࡛ࡢ㟁఩❆ෆ࡛࠸ࡃࡘ࠿ࡢ㓟໬≧ែࢆྲྀࡿ࡜⪃࠼ࡽࢀ࡚࠸ࡿ [1-3]ࠋ᭱㏆ࠊChampion ࡽࡣ㓟໬㑏ඖ๣ࢆ⏝࠸࡚At ࡢᢳฟᣲື࡞ࡽࡧ࡟࢖࢜ࣥ஺᥮ᣲືࡢኚ໬ࢆㄪ࡭ࠊ0.1 M HClO4 Ỉ⁐ᾮ୰࡛ࡢ㓟໬㑏ඖ㟁఩ࢆሗ࿌ࡋࡓ [3]ࠋࡋ࠿ࡋ࡞ࡀࡽࠊࡑࢀࡒࢀࡢ౯ᩘࡸ໬Ꮫ✀࡟ࡘ࠸࡚ࡢᐇ㦂ⓗ᝟ሗࡀᚓࡽࢀ࡚
࠾ࡽࡎࠊࡑࡢሗ࿌࡟ࡣ᭕᫕ࡉࡀṧࡿࠋᡃࠎࡣࢺ࣮ࣞࢧ࣮⃰ᗘ࡛ࡢ㟁ゎ㓟໬㑏ඖࡀྍ⬟࡞ࣇ࣮ࣟ㟁ゎ࣒࢝ࣛ⿦⨨ [4]ࢆ᭷ࡋ࡚࠾ࡾࠊࡇࢀࢆ⏝࠸ࡿ࡜㓟໬≧ែࡸ໬Ꮫ✀ࢆࡼࡾᐜ᫆࡟≉ᐃࡍࡿࡇ࡜ࡀ࡛ࡁࡿࠋࡑࡇ࡛ᮏ◊✲࡛ࡣࣇ࣮ࣟ㟁ゎ࣒࢝ࣛࢆ⏝࠸࡚ At ࡢ㟁ゎ㓟໬㑏ඖࢆ⾜࠸ࠊࡑࡢ㟁఩ࡸࡑࢀࡒࢀࡢ㓟໬≧ែ࡟࠾ࡅࡿ⁐፹ᢳฟᣲືࢆㄪ࡭ࡓࡢ࡛ሗ࿌ࡍࡿࠋ
䛆ᐇ㦂䛇 ᐇ㦂ࡣ኱㜰኱Ꮫ᰾≀⌮◊✲ࢭࣥࢱ࣮/྿⏣ࣛࢪ࢜࢔࢖ࢯࢺ࣮ࣉ⥲ྜࢭࣥࢱ࣮࡞ࡽࡧ࡟
⌮໬Ꮫ◊✲ᡤ RI ࣅ࣮࣒ࣇ࢓ࢡࢺ࣮ࣜ࡟࠾࠸࡚⾜ࡗࡓࠋ୧᪋タ࡟࠾࠸࡚ AVF ࢧ࢖ࢡࣟࢺࣟࣥ
ࢆ⏝࠸ࠊ⵨╔ἲ࡟ࡼࡾㄪ〇ࡋࡓࣅࢫ࣐ࢫ㸦Bi㸧㔠ᒓᶆⓗ࡟ 27㸫28 MeV ࡢDࣅ࣮࣒ࢆ↷ᑕࡋࡓࠋ
209
Bi(D, 2n)211At ཯ᛂ࡟ࡼࡗ࡚༙ῶᮇ 7.2 ᫬㛫ࡢ 211At ࢆྜᡂࡋࡓࠋ⵨␃ἲ࡟ࡼࡗ࡚ Bi ᶆⓗ࠿ࡽAt ࢆẼ┦ศ㞳ࡋࡓᚋࠊ⵨␃Ỉ 1000 PL ࡟ At ࢆ⁐ゎࡋࠊࡇࢀࢆࢫࢺࢵࢡ⁐ᾮ࡜ࡋࡓࠋᕷ㈍ࡢ࢖
ࣥࢪ࢙ࢡࢱ࣮ࢆ⏝࠸࡚ 20 PL ࡢࢫࢺࢵࢡ⁐ᾮࢆ 1.0 M HClO4 ࡟ΰྜࡋࠊࡇࢀࢆࣇ࣮ࣟ㟁ゎ࣒࢝ࣛ⿦⨨࡟ 1000 PL/min ࡢὶ㏿࡛ᑟධࡋࡓࠋ⁐ᾮᒎ㛤ࡢ㛫ࠊ࣒࢝ࣛᆺࡢ࣮࢝࣎ࣥࣇ࢓࢖ࣂ࣮㟁ᴟ࡟ࡣ㸫0.2 V ࠿ࡽ 0.8 V㸦㖟/ሷ໬㖟ཧ↷㟁ᴟ㸧㛫୍࡛ᐃ㟁ᅽࢆ༳ຍࡋࡓࠋ࣒࢝ࣛ㟁ᴟ࠿ࡽࡢ⁐㞳ᾮࢆ 1500 PL ᤕ㞟ࡋࡓᚋࠊ700 PL ࡎࡘ஧ヨᩱࢆูࠎ࡟ࢳ࣮ࣗࣈ࡟ศྲྀࡋࡓࠋࡇࢀࡽ࡟࣊
࢟ࢧࣥ࡟⁐ゎࡋࡓ 0.1 M ࣜࣥ㓟ࣅࢫ(2-࢚ࢳࣝ࣊࢟ࢩࣝ)㸦HDEHP㸧ࢆࡑࢀࡒࢀ 700 PL ຍ࠼࡚᣺࡜࠺ࡋࡓࠋ30 ⛊㛫㐲ᚰศ㞳ࡋࡓᚋࠊ୧┦࠿ࡽ 500 PL ࡎࡘ ᐃᐜჾ࡟ศྲྀࡋࠊGe ᳨ฟჾ࡛X ⥺ࢆ ᐃࡋࡓࠋࡑࢀࡒࢀỈ┦࡜᭷ᶵ┦࡟ྵࡲࢀࡿ At ࡢ⃰ᗘẚ࡜ࡋ࡚ศ㓄ẚ D ࢆᐃ⩏ࡋࠊྛ᮲௳࡟࠾ࡅࡿ D ್ࢆ⟬ฟࡋࡓࠋ䛆⤖ᯝ䛸⪃ᐹ䛇 ணഛⓗ࡞⤖ᯝ࡛ࡣ࠶ࡿࡀࠊ1.0 M HClO4 ⁐ᾮ࡜ 0.1 M HDEHP 㛫ࡢ D ್ࡣ༳ຍ㟁ᅽࡢቑຍ࡟కࡗ࡚ቑຍࢆ♧ࡍ஦ࡀࢃ࠿ࡗࡓࠋࡲࡎࠊ㸫0.2 V ࠿ࡽ 0.2 V ࡢ㟁ᅽ⠊ᅖ࡛ࡣࠊD ್ࡣᚎࠎ࡟ቑຍࢆ♧ࡋࡓࠋḟ࡟ 0.2 V ࠿ࡽ 0.6 V ࡢ㟁ᅽ࡛ࡣࠊD ್ࡣㄗᕪ⠊ᅖෆ୍࡛ᐃࡢ್ࢆ♧ࡋࡓࠋࡉࡽ࡟ 0.8 V ࡛ࡣࠊD ್ࡣࡼࡾ኱ࡁ࡞್ࢆ♧ࡋࡓࠋ㟁ゎ㓟໬㑏ඖ཯ᛂ࡟ࡼࡗ࡚ At ࡢ㓟໬≧ែࡀኚ໬ࡋࡓࡓࡵࠊ༳ຍ㟁ᅽࡢቑῶ࡟ࡼࡾᢳฟ⋡ࡀኚ໬ࡋࡓ࡜⪃࠼ࡽࢀࡿࠋ

䛆ཧ⪃ᩥ⊩䛇
[1] E. H. Appelman, J. Am. Chem. Soc. 83, 805-807 (1961).
[2] A. Cavallero and K. Rössler, Radiochim. Acta 47, 113-118 (1989).
[3] J. Champion et al., J. Phys. Chem. A114, 576-582 (2010).
[4] A. Toyoshima et al., Radiochim. Acta 96, 323-326 (2008).

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P33

㔜㝧Ꮚ↷ᑕ࡛Ⓨ⏕ࡍࡿຍ㏿ჾ୰ᛶᏊ࡟ࡼࡗ࡚〇㐀ࡍࡿࡀࢇ἞⒪⏝ &Xࡢ㧗⣧ᗘ໬࡟㛵ࡍࡿ᳨ウ㔞◊ᶵᵓࠊ༓௦⏣ࢸࢡࣀࣝࠊཎᏊຊᶵᵓ ‫ۑ‬ᶫᮏ࿴ᖾࠊᕝ➃᪉Ꮚࠊ
బ఑⚽ஓࠊబ⸨ಇ୍ࠊሯ⏣࿴᫂ࠊ㡲㒓⏤⨾ࠊỌ஭Ὀᶞࠊึᕝ㞝୍ࠊΏ㎶ ᬛࠊ▼ᒸ඾Ꮚ
䛆⥴ゝ䛇㻌 67Cu㸦༙ῶᮇ 61.9 ᫬㛫㸧ࡣࠊࡀࢇ἞⒪࡟㐺ࡋࡓ࣮࣋ࢱ⥺㸦ᖹᆒ࢚ࢿࣝࢠ࣮141 keV㸧࡜⏬ീ໬࡟㐺ࡋࡓ࣐࢞ࣥ⥺㸦185 keV㸧ࢆྠ᫬࡟ᨺฟࡍࡿࡓࡵࠊࡀࢇ἞⒪⏝᰾✀࡜ࡋ࡚᭷ᮃどࡉࢀࠊࡑࡢ᭷ຠ࡞〇㐀ἲࡀᶍ⣴ࡉࢀ࡚࠸ࡿࠋᚑ᮶ࠊ67Cu ࢆ〇㐀ࡍࡿ࡟ࡣࠊ㧗࢚ࢿࣝࢠ࣮㸦50㹼100 MeV㸧ࡢ㝧Ꮚࢆ⏝࠸ࡓ 68Zn(p,2p)67Cu ࡀ᭱㐺࡛࠶ࡿ࡜⪃࠼ࡽࢀ࡚࠸ࡿࡀࠊ⏕ᡂ㔞ࡀ㝈ࡽࢀ࡚࠸ࡿࡇ࡜ࡸ
๪⏕ᡂ RI㸦66,67Ga, 64Cu ➼㸧ࡢከࡉ➼ࡢၥ㢟Ⅼࡀᣦ᦬ࡉࢀ࡚࠸ࡿࠋࡑࡇ࡛ᡃࠎࡣࠊᚑ᮶ἲ࡟௦ࢃࡿ᪂ࡓ࡞〇㐀ἲ࡜ࡋ࡚ࠊ㔜㝧Ꮚࣅ࣮࣒ࢆ࣒࣋ࣜࣜ࢘ᶆⓗ࡟↷ᑕࡍࡿ஦࡛Ⓨ⏕ࡍࡿ㧗㏿୰ᛶᏊࢆ
68ZnO ࡟↷ᑕࡋ࡚ 67Cu ࢆ〇㐀ࡍࡿᡭἲ [ 68Zn(n,x)67Cu ཯ᛂ (x=n’p, d) ]࡟╔┠ࡋࠊ
Zn-Cu ᇶᮏศ㞳ἲ 1) ➼ࢆ㛤Ⓨࡋ࡚ࡁࡓࠋ௒ᅇࡣࠊཌ࠸ ZnO ࢱ࣮ࢤࢵࢺヨᩱࢆ⏝࠸ࡓሙྜ࡟⏕ᡂࡀ☜ㄆࡉࢀࡓ
67Ga㸦༙ῶᮇ 78.3 ᫬㛫㸧ࡢศ㞳ࣉࣟࢭࢫࢆ㏣ຍࡍࡿ࡜࡜ࡶ࡟ࠊᛂ⏝࡟ྥࡅ࡚㔜せ࡞ᣦᶆ࡛࠶ࡿẚᨺᑕ⬟ࡢホ౯ࢆ⾜ࡗࡓࡢ࡛ࠊࡑࡢ⤖ᯝࢆሗ࿌ࡍࡿࠋ
䛆ᐇ㦂䛇 㔞◊ᶵᵓ 㧗ᓮ◊ࢧ࢖ࢡࣟࢺࣟࣥࡢ㔜㝧Ꮚࣅ࣮࣒㸦50 MeV, ᭱኱ 3 μA㸧ࢆ࣒࣋ࣜࣜ࢘
ᶆⓗ࡟↷ᑕࡋ࡚ᚓࡽࢀࡿ㧗㏿୰ᛶᏊࢆ 68ZnO ⃰⦰ࢱ࣮ࢤࢵࢺ㸦⃰⦰ᗘ 99.291%㸧࡟ 5-10 ᫬㛫↷ᑕࡋ࡚ 67Cu ࢆ⏕ᡂࡋࡓࠋ࡞࠾ࠊ↷ᑕ୰ࡢ୰ᛶᏊ㐽࡬࠸ࡣࠊࣃࣛࣇ࢕ࣥࣈࣟࢵࢡࢆ⏝࠸࡚⾜ࡗࡓࠋ໬Ꮫศ㞳ࡣࠊ࣮࢟ࣞࢺᶞ⬡㸦Chelex-100㸧ཬࡧ㝜࢖࢜ࣥ஺᥮ᶞ⬡㸦AG1-X8㸧࣒࢝ࣛἲࢆ⤌ࡳྜࢃࡏࡓ Zn-Cu ᇶᮏศ㞳ἲ࡟ࠊ㝧࢖࢜ࣥ஺᥮ᶞ⬡㸦AG50W㸧࣒࢝ࣛࢆ㏣ຍࡋ࡚⾜࠸ࠊGa 㝖ཤ⋡ࢆồࡵࡓࠋࡉࡽ࡟ࠊ67Cu ࡢẚᨺᑕ⬟ࢆホ౯ࡍࡿࡓࡵ࡟ࠊ᭱⤊ⓗ࡟ᚓࡽࢀࡓ 67Cu ⁐ᾮࢆ⏝࠸࡚ࠊCu ࡜ࡢ཯ᛂᛶ࡟ᐩࡴ DOTA ᶆ㆑ࢆᐇ᪋ࡋࡓࠋࡲࡓࠊ⃰⦰ 68ZnO ࢱ࣮ࢤࢵࢺ࡟ྵ
ࡲࢀࡿ Cu ࡢ஦๓㝖ཤࡣࠊ࣮࢟ࣞࢺᶞ⬡࣒࢝ࣛἲࢆ⏝࠸࡚⾜࠸ࠊ0.001 M HCl ࡛⁐ฟࡉࢀࡿ⃰⦰ 68Zn ⁐ᾮ࡟㧗⣧ᗘ NaOH ⁐ᾮࢆຍ࠼࡚ࠊỈ㓟໬≀࡜ࡋ࡚ỿẊ࣭ศ㞳࣭Ὑίࡋࠊ㟁Ẽ⅔
୰ 130ΥЍ400Υ࡛ຍ⇕ࡋ࡚ࠊ68ZnO ⢭〇ヨᩱ࡜ࡋࡓࠋ
㻌䛆⤖ᯝ䞉⪃ᐹ䛇㻌 67Ga ศ㞳ᡭἲࡢ㛤Ⓨ࡛ࡣࠊ᪤ሗࡢᇶᮏศ㞳ἲ࡟ࠊ㝧࢖࢜ࣥ஺᥮ᶞ⬡࣒࢝ࣛࢆ㏣ຍ
ࡍࡿࡇ࡜࡟ࡼࡾࠊ67Cu ࡢᅇ཰⋡ 90㸣௨ୖࢆ⥔ᣢࡋࡓࡲࡲࠊ᭱⤊ 67Cu ⁐ᾮ୰ࡢ 67Ga ྵ㔞ࢆ᳨ฟ㝈⏺௨ୗ࡟ࡍࡿࡇ࡜ࡀ࡛ࡁࡓࠋࡇࢀࡲ࡛ࡢ⤖ᯝ࡜ేࡏࠊຍ㏿ჾ୰ᛶᏊ࡟ࡼࡗ࡚〇㐀ࡍࡿ 67Cu ࢆࢱ࣮ࢤࢵࢺ≀㉁㸦Zn㸧ཬࡧ๪⏕ᡂ RI㸦65Ni, 67Ga㸧࠿ࡽศ㞳ࡍࡿᡭἲࢆ☜❧ࡋࡓࠋḟ࡟ࠊᚓࡽࢀࡓ
67Cu ࡢẚᨺᑕ⬟㸦GBq/μg Cu㸧ࢆホ౯ࡍࡿࡓࡵ࡟ࠊ67Cu-DOTA ᶆ㆑⋡ࡢ DOTA ⃰ᗘ౫Ꮡᛶࢆㄪ࡭ࠊ࡯ࡰ 100㸣ᶆ㆑⋡ࡀᚓࡽࢀࡿ DOTA ࡢ᭱ᑠ⃰ᗘࡀࠊ⁐ᾮ୰࡟Ꮡᅾࡍࡿ Cu㸦II㸧ࡢ⃰ᗘ࡟➼ࡋ࠸࡜⪃࠼࡚ࠊCu ࡢ໬Ꮫ㔞ࢆ⟬ฟࡋࡓࠋࡑࡢ⤖ᯝࠊ5 g ⢭〇῭ࡳ 68ZnO ࠿ࡽ〇㐀࣭ศ㞳ࡋࡓ 67Cu ⁐ᾮ୰࡟ྵࡲࢀࡿ Cu 㔞ࡣࠊ3.7 μg ࡛࠶ࡾࠊᡃࠎࡀᥦ᱌ࡋ࡚࠸ࡿ 40 MeV, 2 mA㔜㝧Ꮚຍ㏿ჾ㸦Ⅳ⣲ᶆⓗ㸧2㸧࡛ 24 ᫬㛫↷ᑕ࡛〇㐀ࡋࡓሙྜࡢ 67Cu ࡢẚᨺᑕ⬟ࡣࠊ2.1 GBq/μg
Cu ࡜⟬ฟࡉࢀࡿࠋࡇࡢ್ࡣࠊ⌧ᅾࠊࣈࣝࢵࢡ࣊ࣈࣥᅜ❧◊✲ᡤࡢ LINAC ࡛ 24 ᫬㛫㝧Ꮚ↷ᑕ࡛〇㐀ࡉࢀ࡚࠸ࡿ 67Cu ࡢẚᨺᑕ⬟㸦0.7 GBq/μg Cu ௨ୗ㸧3㸧ࡢ 3 ಸ࡛࠶ࡿࠋ
㻌䠄ཧ⪃ᩥ⊩䠅㻌 [1] M. Kawabata et al., J. Radioanal. Nucl. Chem. 303, 1205 (2015). [2] Y. Nagai et al.,J. Phys. Soc. Jpn. 82, 064201-1(2013). [3] D. G. Medvedev, et al., Appl. Radiat. Isot. 70, 423(2012).

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P34

211Rn–211At

ࢪ࢙ࢿ࣮ࣞࢱ࣮㛤Ⓨࢆ┠ⓗ࡜ࡋࡓࢩࣜࣥࢪᐦᑒᢳฟ⣔ࡢ

At/Rn ศ㞳ಀᩘࡢ◊✲(㔠ἑ኱㝔⮬↛ 1ࠊ㔠ἑ኱⌮ᕤ 2ࠊ㔞◊ᶵᵓ㔞Ꮚࣅ࣮࣒ 3ࠊ㔠ἑ኱་⸆ಖ೺ 4)۵ᒣ⏣グ኱ 1ࠊ᪂ ⿱႐ 2ࠊ኱Ụᓫኴ 2ࠊᮧୖᣙ෤ 2ࠊᶫᮏ࿴ᖾ 3ࠊす୰୍ᮁ 3ࠊ㮖ᒣᖾಙ 4ࠊᶓᒣ᫂ᙪ 2ศ㞳ಀᩘ࠙ᗎㄽࠚ 211At㸦T1/2 = 7.2 h㸧ࡣ α ᨺᑕᛶ᰾✀࡛࠶ࡾ㸪ᨺᑕࡉࢀࡿ α ⥺ࡣ㣕⛬ࡀ▷ࡃ㧗 LET ࡛࠶ࡿࠋࡑࡢࡓࡵ⭘⒆࿘㎶࡬ࡢ㈇ᢸࢆᢚ࠼㸪⭘⒆㒊࡬ࡢຠ⋡ⓗ࡞࢚ࢿࣝࢠ࣮௜୚ࡀ࡛ࡁࡿࡇ࡜
࠿ࡽ㸪࢔࢖ࢯࢺ࣮ࣉ἞⒪࡟฼⏝࡛ࡁࡿ᰾✀ࡢ୍ࡘ࡜ࡋ࡚ὀ┠ࡉࢀ࡚࠸ࡿࠋࡋ࠿ࡋ㸪༙ῶᮇࡀ▷࠸ࡇ࡜࠿ࡽ౑⏝࡟㝿ࡋ࡚᫬㛫ⓗ㸪㊥㞳ⓗไ㝈ࡀຍ࠼ࡽࢀࡿࠋࡇࢀࢆゎỴࡍࡿࡓࡵ࡟ᡃࠎࡣ
ぶ᰾✀࡛࠶ࡿ 211Rn㸦T1/2=14.6 h㸧ࢆసࡾ㸪ࡑࡇ࠿ࡽࡢ࣑ࣝ࢟ࣥࢢ࡟ࡼࡗ࡚㸪211At ࢆྲྀࡾฟࡍ
211
Rn-211At ࢪ࢙ࢿ࣮ࣞࢱ࣮ࡢ㛤Ⓨࢆ㐍ࡵ࡚࠸ࡿࠋࡇࢀࡲ࡛ࢻࢹ࢝ࣥ࠾ࡼࡧ 100%࣓ࢱࣀ࣮ࣝࢆ
⏝࠸ࡓࢩࣜࣥࢪᐦᑒᢳฟ⣔ࢆ㛤Ⓨࡋ㸪ึࡵ࡚ 211Rn ࡢᐦᑒ࡟ᡂຌࡋࡓࠋࡋ࠿ࡋ㸪࣓ࢱࣀ࣮ࣝ࡬
ࡢ 211At ᢳฟࡢ㝿࡟ 30㸣⛬ᗘ 211Rn ࡶᢳฟࡉࢀ࡚ࡋࡲ࠺࡜࠸࠺ၥ㢟ࡀ࠶ࡗࡓࠋࡑࡇ࡛ᮏ◊✲࡛ࡣ㸪ࡼࡾ At ࡢ᰾✀⣧ᗘࡀ㧗࠸⣔ࢆぢࡘࡅࡿࡓࡵ࡟㸪NBS㸦N-ࣈࣟࣔࢫࢡࢩࣥ࢖࣑ࢻ㸧ࢆ⁐ゎࡋࡓ࣓ࢱࣀ࣮ࣝࡲࡓࡣ࢚ࢱࣀ࣮ࣝ⁐ᾮ࡟ࡘ࠸࡚㸪࢔ࣝࢥ࣮ࣝ⃰ᗘࢆኚ໬ࡉࡏࡓ At/Rn ศ㞳ಀᩘ㸦={([211At]࢔ࣝࢥ࣮ࣝ⁐ᾮ/[211At]ࢻࢹ࢝ࣥ)/([211Rn]࢔ࣝࢥ࣮ࣝ⁐ᾮ/[211Rn]ࢻࢹ࢝ࣥ)}㸧ࢆㄪᰝࡋࡓࠋ
࠙ᐇ㦂ࠚ ཎᏊຊ◊✲㛤Ⓨᶵᵓࡢࢱࣥࢹ࣒ຍ㏿ჾ࡟ࡼࡿ 60 MeV 7Li ࣅ࣮࣒ࢆ㸪Bi ࢱ࣮ࢤࢵࢺ
࡟↷ᑕࡋ㸪209Bi(7Li, 5n)211Rn ཯ᛂ࡛ 211Rn ࢆ⏕ᡂࡋࡓࠋ211Rn ࢆࢱ࣮ࢤࢵࢺ࠿ࡽࢻࢹ࢝ࣥ࡟ᢳฟ
ࡋࢩࣜࣥࢪෆ࡟ᐦᑒࡋࡓࠋ211At ᡂ㛗ࢆᚅࡗࡓᚋ㸪NBS ࢆ⁐ゎࡋࡓ⃰ᗘࡢ㐪࠺࣓ࢱࣀ࣮ࣝࡲࡓ
ࡣ࢚ࢱࣀ࣮ࣝỈ⁐ᾮࡀධࡗࡓࢩࣜࣥࢪ࡜᥋⥆ࡋ㸪✵Ẽ┦ࡀ᥋ゐࡋ࡞࠸ࡼ࠺࡟ 211At ㏫ᢳฟࢆ⾜ࡗࡓࠋ┦ศ㞳ᚋ γ ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺ࣮ࣜ࠾ࡼࡧ PERALS ᾮయࢩࣥࢳ࣮ࣞࢩࣙࣥࢩࢫࢸ࣒ࢆ⏝࠸࡚㸪ྛ┦ࡢ 211Rn㸪211At ᨺᑕ⬟⃰ᗘࢆᐃ㔞ࡋ㸪At ࡢ Rn ࡟ᑐࡍࡿศ㞳ಀᩘࢆᚓࡓࠋ
࠙⤖ᯝ࡜⪃ᐹࠚྛ࢔ࣝࢥ࣮ࣝ⃰ᗘ࡟ᑐ
25.0ࡍࡿศ㞳ಀᩘࢆ Fig. 1 ࡟♧ࡍࠋ࣓ࢱࣀ࣮
20.0ࣝ࡟࠾࠸࡚ࡣ 90%࡛ᛴ⃭࡞ୖ᪼ࢆぢࡏ࢚ࢱࣀ࣮࡚ࣝ࠾ࡾ㸪࢚ࢱࣀ࣮ࣝ࡟࠾࠸࡚ࡣ 60%ࡼ
15.0
࣓ࢱࣀ࣮ࣝ
ࡾᛴ⃭࡞ୖ᪼ࢆぢࡏࡓࠋࡇࢀࡣỈᏑᅾ
10.0
ୗ࡛ࡣ NBS ࡀኻάࡍࡿࡇ࡜ࡀᙳ㡪ࡋ࡚
5.0࠸ࡿࠋࡲࡓ 40%௨ୖࡢ⃰ᗘᇦ࡛ࡣ඲య
ⓗ࡟࢚ࢱࣀ࣮ࣝࡢ᪉ࡀ㸪ศ㞳ಀᩘࡀ኱
0.0



ࡁ࠸ࡇ࡜ࡀศ࠿ࡗࡓࠋ≉࡟࢚ࢱࣀ࣮ࣝ
࢔ࣝࢥ࣮ࣝ⃰ᗘ(%)
90%࡟࠾࠸࡚᭱኱್㸦= 22 ± 1㸧ࢆ♧ࡋ
211
Fig. 1 ศ㞳ಀᩘࡢ࢔ࣝࢥ࣮ࣝỈ⁐ᾮ⃰ᗘ౫ᏑᛶRn ࡜ 211At ࡢศ㞳ࡀⰋࡃ㸪At ᢳฟ⋡ࡶ 90%㏆࠸್ࢆ♧ࡋ࡚࠸ࡓࠋࡋ࠿ࡋ㸪ࡇࡢศ㞳ಀᩘ࡛ࡣ Rn ࡣࡲࡔ 20%㏆ࡃᢳฟࡉࢀ࡚࠾ࡾ㸪ࢪ࢙ࢿ࣮ࣞࢱ࣮ࡢᢳฟᾮ࡜ࡋ࡚ࡣ༑
ศ࡞⤖ᯝ࡜ࡣ࠸࠼࡞࠸ࠋ௒ᚋࡢㄢ㢟࡜ࡋ࡚ᢳฟ๣ࡢᨵⰋ➼࡟ࡼࡿࡉࡽ࡞ࡿศ㞳ಀᩘࡢྥୖࢆ
᳨ウࡍࡿࠋ
Development of a 211Rn/211At Generator with a Closed Extraction System of Syringes via
the Determination of the Relevant At/Rn Separation Factor
YAMADA, N., SHIN, Y., OOE, S., MURAKAMI, K., HASHIMOTO, K., NISHINAKA, I.,WASHIYAMA, K., YOKOYAMA, A.

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P35

ᶞ⬡ᢸᣢ᭷ᶵ䝇䝈ヨ⸆䜢⏝䛔䛯 㻞㻝㻝㻭㼠 ศ㞳㻛ᶆ㆑䛾ヨ䜏㻌㜰኱㝔⌮ ࠊཎᏊຊᶵᵓඛ➃ࢭ ࠊ㜰኱⌮ ࠊ㜰኱ 5, ࢭ  ‫⏣⚄ۑ‬᫭඘ ࠊ㇏ᔱཌྐ ࠊụ⏣༟ᾏ ࠊྜྷᮧᓫ ࠊ⠛ཎཌ ࠙⥴ゝࠚ㏆ᖺࠊα ⥺ᨺฟ᰾✀࡛࠶ࡿ 211At ࡢ α ⥺ෆ⏝⒪ἲ࡟ྥࡅࡓ◊✲ࡀ┒ࢇ࡟⾜ࢃࢀ࡚࠸ࡿࠋ
୍⯡ⓗ࡟ 211At ᶆ㆑〇๣ࡣࠊ211At ࢆ 209Bi(α, 2n)211At ཯ᛂ࡛〇㐀ࡋࠊBi ᶆⓗ࠿ࡽ 211At ࢆ໬Ꮫⓗ࡟ศ㞳ࡋࡓᚋࠊᢠయࡸ໬ྜ≀࡟᭷ᶵ໬Ꮫⓗ࡟ᶆ㆑ࡍࡿࡇ࡜࡛ྜᡂࡉࢀࡿࠋᮏ◊✲࡛ࡣࡇࡢ᧯
సࡢ⡆౽໬ࡢࡓࡵࠊAt ࡜ Bi ࡢ᭷ᶵ໬ྜ≀࡜ࡢ཯ᛂᛶࡢ㐪࠸ࢆ฼⏝ࡋࠊᶞ⬡ࢆ⏝࠸࡚ At ࡢศ㞳࡜ᶆ㆑ࢆྠ᫬࡟⾜࠺ᡭἲࡢ㛤Ⓨࢆヨࡳࡓࠋ࠙ᐇ㦂ࠚ࣏ࣜ(co-ࢫࢳࣞࣥ-࣐ࣞ࢖ࣥ㓟↓Ỉ≀)ࢡ࣓ࣥᮎ➃(average Mw = ~1600)ࢆ࢚ࢳࣞࣥࢪ
࢔࣑࡛ࣥᯫᶫࡋ࡚୙⁐໬ࡋࡓࡢࡕࠊN-ࣄࢻࣟ࢟ࢩࣝ࢖࣑ࢻ໬ࡋࠊ⦰ྜ๣Ꮡᅾୗ࡛ 3-ࢺ࣓ࣜࢳࣝ
ࢫࢱࣥࢽࣝᏳᜥ㤶㓟ࢆάᛶ࢚ࢫࢸࣝ࡜ࡋ࡚⤖ྜࡋࡓᶞ⬡(Fig.1)ࢆᚓࡓ[1, 2]ࠋࡇࢀࡣࠊ࢔ࢫࢱ
ࢳࣥࢆᢠయ࡟ᶆ㆑ࡍࡿࡓࡵ࡟⏝࠸ࡽࢀ࡚࠸ࡿ
Fig.1. ࣞࢪࣥࡢᵓ㐀ࠋపศᏊ࡛࠶ࡿ 3-ࢺ࣓ࣜࢳࣝࢫࢱࣥࢽࣝᏳᜥ㤶
㓟-N-ࢫࢡࢩࣥ࢖࣑ࢪࣝࢆᶞ⬡࡟⤖ྜࡋࡓᙧࡢ
ࡶࡢ࡜࡞ࡗ࡚࠸ࡿࠋࡇࡢᶞ⬡ࢆ⏝࠸࡚ࠊḟࡢ᪉ἲ࡛ At ࡢศ㞳/ᶆ㆑ᐇ㦂ࢆ⾜ࡗࡓࠋ኱㜰኱Ꮫ᰾≀⌮◊✲ࢭࣥࢱ࣮ࡢ AVF ࢧ࢖ࢡࣟࢺࣟࣥ࡟࠾
࠸࡚ࠊ29 MeV ࡢ α ࣅ࣮࣒ࢆ Bi 㓟໬≀ᶆⓗ࡟↷ᑕࡋࠊ209Bi(α, 2n)211At ཯ᛂ࡟ࡼࡗ࡚ 211At ࢆ〇㐀ࡋࡓࠋ↷ᑕᚋࡢᶆⓗࢆ Fig.2 ࡢࢫ࣮࣒࡛࢟⁐ᾮㄪ〇ࡋࠊྜᡂࡋࡓᶞ⬡࡜཯ᛂࡉࡏࡓࠋ᭱⤊⁐ᾮ
ࡣࠊHPLC ࡟࡚ UV=254 nm ࡛྾ගศᯒࡋࡘࡘ
30 ⛊ࡈ࡜࡟ศᾮࡋࠊ࣐࢞ࣥ࢝࢘ࣥࢱ࣮ࢆ⏝࠸
࡚ 211At ㉳※ࡢ 79 keV X ⥺ࢆ ᐃࡋࡓࠋ࠙⤖ᯝࠚAt ࡣ௒ᅇྜᡂࡋࡓᶞ⬡ࢆ⏝࠸࡚ಖᣢࡉ
ࢀࡿࡇ࡜ࡀࢃ࠿ࡗࡓࠋࡋ࠿ࡋ࡞ࡀࡽࠊࡑࡢᶞ⬡ୖ࡬ࡢ཰⋡ࡣ 15㸣⛬ᗘ࡜ᑠࡉ࠿ࡗࡓࠋᇶయ࡜࡞
ࡿ࣏ࣜࢫࢳࣞࣥᶞ⬡ࢆ⏝࠸ࡓᐇ㦂࡜ࡢẚ㍑࠿
Fig.2.
Fig
2 ᐇ㦂ࢫ࣮࣒࢟
ᐇ㦂ࢫ࣮࣒࢟ࠋ
ࡽࠊಖᣢࡉࢀ࡚࠸ࡿ At ࡢ࠾ࡼࡑ 6-8 ๭ࡣ┠ⓗ࡜ࡍࡿࢺ࣓ࣜࢳࣝࢫࢱࣥࢽࣝᇶ࡛ࡣ࡞ࡃᶞ⬡୰ࡢࢫࢳࣞࣥṧᇶ࡜཯ᛂࡋ࡚࠸ࡿࡇ࡜ࡀ᫂ࡽ࠿࡜࡞ࡗࡓࠋࡲࡓࠊ཰⋡ࡀప࠸ࡓࡵ᭱⤊ⓗ࡞ࣈࢳࣝ࢔࣑ࣥ࡜཯ᛂࡋࡓ࢔࣑ࢻࡣほ ࡉࢀ࡞࠿ࡗࡓࠋࡑࡢࡓࡵࠊ⌧ᅾ࣏ࣜࢫࢳࣞࣥࢆྵࡲ࡞࠸
ᶞ⬡ࡢ㛤Ⓨ࡞ࡽࡧ࡟ 125I ࢆ⏝࠸ࡓᐇ㦂᮲௳ࡢ᳨ウࢆ⾜ࡗ࡚࠸ࡿࠋ
࠙ཧ⪃ᩥ⊩ࠚ
[1] R. Chinchilla et al., Tetrahedron Lett., 2001, 42(27), 4487-4489.
[2] H. Shao et al., Tetrahedron Lett., 2000, 41(22), 4257-4260.

An attempt for separation/labeling of 211At with resin-supported organotin reagents
KANDA, A., TOYOSHIMA, A., IKEDA, T., YOSHIMURA, T., SHINOHARA, A.

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䢢

P36ࣜ࢔ࣝࢱ࢖࣒ RI ࢖࣓࣮ࢪࣥࢢࢩࢫࢸ࣒ࢆ⏝࠸ࡓ᳜≀యෆඖ⣲ືែࡢྍど໬ᢏ⾡ࡢ㛤Ⓨ ᮾ኱㝔㎰ ࠊ-6735(672 ‫ۑ‬ᮡ⏣ுᖹ ࠊᑠᯘዉ㏻Ꮚ ࠊᘅ℩㎰ ࠊ⏣㔝஭៞ኴᮁ ࠊ୰す཭Ꮚ 䛆⥴ゝ䛇ᨺᑕᛶྠ఩య㸦RI㸧ࢆ⏝࠸ࠊ⏕ࡁࡓ᳜≀࡟࠾ࡅࡿඖ⣲ࡢ㍺㏦࣭ศ㓄࣭⵳✚࡞࡝ࡢືࡁࢆྍど໬ࡋࠊ࠿ࡘᐃ㔞ⓗ࡟ゎᯒ࡛ࡁࡿࡇ࡜ࢆ┠ᣦࡋࡓࠊࣜ࢔ࣝࢱ࢖࣒ RI ࢖࣓࣮ࢪࣥࢢࢩࢫࢸ
࣒㸦RRIS㸧ࢆ⊂⮬࡟㛤Ⓨࡋ࡚ࡁࡓࠋᮏࢩࢫࢸ࣒ࡣࠊ᳜≀ࢆᗈ⠊ᅖ࡟ྍど໬ࡍࡿ macro-RRIS ࡜㢧ᚤ㙾ୗ࡛ྍど໬ࡍࡿ micro-RRIS ࡢ 2 ࡘࡢᵝᘧ࠿ࡽᡂࡿࠋ
ᮏ◊✲࡛ࡣࠊ
᳜≀ࡢᚲ㡲ඖ⣲࡛࠶ࡿ 14Cࠊ28

Mgࠊ32Pࠊ35Sࠊ42Kࠊ45Caࠊ54Mnࠊ59Feࠊ65Zn ࡢ௚ࠊ22Naࠊ109Cdࠊ137Cs ࡞࡝ከᵝ࡞᰾✀ࢆ⏝࠸ࠊ᳜≀ᆅୖ㒊࠾ࡼࡧ᰿࡟࠾ࡅࡿྛඖ⣲ࡢືែࢆྍど໬ࡋࡓࡢ࡛ሗ࿌ࡍࡿࠋ
䛆ᐇ㦂䛇౪ヨ᳜≀ࡣࢩࣟ࢖ࢾࢼࢬࢼ㸦A. thaliana㸧ࢆࠊ᰾✀ࡣ 14Cࠊ22Naࠊ28Mgࠊ32Pࠊ35Sࠊ42Kࠊ
45
Caࠊ54Mnࠊ59Feࠊ65Znࠊ109Cd ࠾ࡼࡧ 137Cs ࢆ⏝࠸ࡓࠋỈ⪔ᾮ࡛⣙ 40 ᪥㛫⏕⫱ࡉࡏࡓᰴࢆ⏝࠸ࠊࡲࡎࠊྛ᰾✀ࢆỈ⪔ᾮ࡟ῧຍࡋ᰿࠿ࡽᆅୖ㒊࡬ࡢ྾཰ືែࡢྍど໬ࢆ⾜ࡗࡓࠋḟ࡟ᆅୖ㒊࠿ࡽ᰿࡬ࡢඖ⣲ືែࡢྍど໬࡟ࡣࠊࢤࣝᇵᆅ࡛ 7 ᪥㛫⏕⫱ࡉࡏࡓᰴࢆ⏝࠸ࡓࠋ14C ᶆ㆑Ⅳ㓟࢞ࢫࡣࠊ14C-Ⅳ㓟Ỉ⣲ࢼࢺ࣒ࣜ࢘࡜ங㓟ࢆ⏝࠸⏕ᡂࡉࡏࠊ⿄࡛ᐦ㛢ࡉࡏࡓⴥ࡟ࢩࣜࣥࢪ࡟ࡼࡾ౪⤥ࡋࠊගྜᡂ࡟ࡼࡿྲྀࡾ㎸ࡳࢆྍど໬ࡉࡏࡓࠋࡑࡢ௚ࡢ᰾✀ࡣࠊⴥ࡟ሬᕸࡋ࡚྾཰ࡉࡏࡓࠋ
࠙⤖ᯝࠚ᰿࡬ࡢ RI ౪⤥࡛ࡣࠊᆅୖ㒊ࡢඖ⣲ືែࡣྛඖ⣲ࡢ⛣ື㏿ᗘࡢ㐪࠸࠿ࡽࠊ(1) ᳜≀඲య࡟ᆒ୍࡟ศᕸࡋࡓ 22Na, 32P, 35S ࡜ 137Csࠊ(2) ⴥࡸⱼ㡬ഃ࡜ẚ㍑ࡋ࡚ⰼⱼࡢᇶ㒊ഃ࡟⵳✚ࡋࡓ28
Mg, 45Ca ࡜ 54Mnࠊ(3) ᳜≀඲య࡟ศᕸࡋ࡞ࡀࡽࡶࠊ≉࡟Ⳓ࡞࡝࡟ᒁᡤ࡞⵳✚ࡀࡳࡽࢀࡓ 65Zn
࡜ 109Cd ࡢ 3 ࡘࡢࢢ࣮ࣝࣉ࡟ศ㢮ࡉࢀࡓ㸦ᅗ-1㸧
ࠋ
(a)

(b)

(c)

ᅗ -1  ࢩ ࣟ ࢖ ࢾ ࢼ ࢬ ࢼ ࡟ ࠾ ࡅࡿࠊ྾཰㛤ጞ 24 ᫬㛫ᚋ࡟࠾ࡅࡿ
RI ศᕸ⏬ീࠋ(a)

22

Na, (b)28

Mg, (c)109

Cdᕥ㸹ᐇ෗┿ࠊྑ㸹RI ⏬ീᆅୖ㒊࡬ࡢ RI ౪⤥࡟ࡼࡿ᰿࡬ࡢඖ⣲ືែ࡛ࡣࠊ14C-ගྜᡂ⏘≀ࡣ୺᰿࠾ࡼࡧഃ᰿ࡢ᰿➃࡟ከࡃศᕸࡍࡿᵝᏊࡀྍど໬ࡉࢀࡓ㸦ᅗ-2a㸧ࠋ᰿࡟ࡘ࠸࡚ micro-RRIS ࡟ࡼࡾヲ⣽࡟ㄪ࡭ࡓ࡜ࡇࢁࠊ
᰿ࡢศ⿣㡿ᇦ࡟⵳✚ࡋ࡚࠸ࡃࡇ࡜ࡀ♧ࡉࢀࡓ㸦ᅗ-2b, 2c㸧ࠋ(a)
2 weeks(b)(c)

1 weekᅗ-2 ᰿࡟࠾ࡅࡿ 14C-ගྜᡂ୺᰿⏘≀ࡢ㍺㏦ືែ
(a) macro-RRIS ⏬ീࠋ୺᰿(b) ᰿ࡢඛ➃࡟࠾ࡅࡿᐇ⏬ീ(c) micro-RRIS ⏬ീࠋഃ᰿Development of Real-Time RI Imaging System to Visualize Ion Transport in Plants.
SUGITA R., KOBAYASHI I. N., HIROSE A., TANOI K. , NAKANISHI M. T.

- 116 -P37

J-PARC MUSE ࡢ኱ᙉᗘ࣑ࣗ࢜ࣥࣅ࣮࣒ࢆ⏝࠸ࡓ࣑ࣗ࢜ࣥཎᏊྲྀࡾฟࡋ
ᐇ㦂㜰኱㝔⌮ ࠊ㧗࢚ࢿ◊  ‫⏣ྜྷۑ‬๛ ࠊ஧ᐑ࿴ᙪ ࠊ✄ᇉㄔ ࠊ㇏⏣ᒱ⪽ ࠊ㟷ᮌ㡰 ࠊἙᮧᡂ⫕ ࠊ୕Ꮿᗣ༤ ࠊ⠛ཎཌ 䛆⥴ゝ䛇㻌 ཎᏊ⣔࡟㈇㟁Ⲵࡢ࣑ࣗ࢜ࣥࢆᣢࡘ࣑ࣗ࢜ࣥཎᏊࡣࠊ࣑ࣗ࢜ࣥ࡟ࡼࡾ᰾㟁Ⲵࡀᙉࡃ㐽ⶸࡉࢀࡿࡓࡵ࡟ࠊZ-1 ཎᏊ࡟㏆࠸ᛶ㉁ࢆᣢࡘ࡜⪃࠼ࡽࢀ࡚࠸ࡿࠋᮏ◊✲࡛ࡣࠊ࣑ࣗ࢜ࣥཎᏊࢆ໬
Ꮫ✀࡜ࡋ࡚ᢅ࠸ࠊ࣑ࣗ࢜ࣥཎᏊࡢ໬Ꮫ཯ᛂࢆほ ࡍࡿࡇ࡜ࢆ┠ⓗ࡟ࠊ࣑ࣗ࢜ࣥཎᏊࡢྲྀࡾฟ
ࡋࡢࡓࡵࡢᇶ♏◊✲ࢆ⾜ࡗࡓࠋᮏ◊✲࡛ࡣࠊᐇ⌧ྍ⬟࡞▷ᮇⓗ࡞┠ᶆ࡜ࡋ࡚ࠊᮏ◊✲࡛ࡣࠊ࣑ࣗ࢜ࣥཎᏊࢆ☢ሙࡸ㟁ሙࢆ⏝࠸ࡿࡇ࡜࡟ࡼࡾ༢㞳ࡋࠊ࣑ࣗ࢜ࣥཎᏊ㸦࢖࢜ࣥ㸧ࣅ࣮࣒ࢆྲྀ
ࡾฟࡍᡭἲࡢ㛤Ⓨࢆ⾜ࡗࡓࠋཎᏊ࡟ࡼࡿ࣑ࣗ࢜ࣥᤕ⋓࠿ࡽ࣑ࣗ࢜ࣥཎᏊࡀᙧᡂࡉࢀࡿ࡜ࡁࠊ
࣑ࣗ࢜ࣥࡢ⬺ບ㉳࡟క࠺࣮࢜ࢪ࢙㟁Ꮚᨺฟ࡟ࡼࡾ࣑ࣗ࢜ࣥཎᏊࡣከ౯ࡢṇ࢖࢜ࣥ࡜࡞ࡿࠋ௒
ᅇࠊᡃࠎࡣࠊᙧᡂ┤ᚋࡢ࣑ࣗ࢜ࣥཎᏊࢆ㟁ሙ࡛ᤲᘬࡍࡿࡇ࡜࡟ࡼࡾࠊᏙ❧⣔ࡢ࢖࢜ࣥࣅ࣮࣒
࡜ࡋ࡚ྲྀࡾฟࡍࡓࡵࡢ⿦⨨ࢆ㛤ⓎࡋࠊⲈᇛ┴ᮾᾏᮧࡢຍ㏿ჾ᪋タ J-PARC MUSE ࡢ኱ᙉᗘ࣑
ࣗ࢜ࣥࣅ࣮࣒ࢆ⏝࠸ࡓᐇ㦂ࢆ⾜ࡗࡓࡢ࡛ሗ࿌ࡍࡿࠋ
䛆ᐇ㦂䛇 ⿦⨨ࡢᴫせࢆᅗ㸯࡟♧ࡍࠋཎ⌮࡜ࡋ࡚ࡣࠊ┿✵ࢳ࢙ࣥࣂ࣮ෆࡢⷧ⭷ࢱ࣮ࢤࢵࢺ࡟࣑ࣗ
࢜ࣥࣅ࣮࣒ࢆ↷ᑕࡋࠊ࣑ࣗ࢜ࣥࢆᤕ⋓ᚋࠊࢡ࣮ࣟࣥ┦஫స⏝࡟ࡼࡾⷧ⭷ࡼࡾ㣕ࡧฟࡋࡓ࣑ࣗ
࢜ࣥཎᏊ࢖࢜ࣥࢆ㟁ᴟ࡟ࡼࡾຍ㏿ࠊTOF ἲࢆ⏝࠸࡚࣑ࣗ࢜ࣥཎᏊ࢖࢜ࣥࢆศ㞳ࠊ ᐃࡍࡿࠋࢱ࣮ࢤࢵࢺⷧ⭷࡜ࡋ࡚⏝࠸ࡓ PTFE㸦ࢸࣇࣟࣥ®㸧ࡣࠊࣃࣝࢫ࣮ࣞࢨ࣮➼ࡢ↷ᑕ࡟ࡼࡿ F ཎᏊ࢖࢜ࣥྲྀࡾฟࡋࡀሗ࿌ࡉࢀ࡚࠾ࡾࠊධᡭࠊྲྀࡾᢅ࠸ࡀᐜ࡛᫆࠶ࡿ࡜࠸࠺฼Ⅼࡀ࠶ࡿࠋⓎ⏕ࡋࡓ⢏Ꮚࡢ᳨ฟ࡟ࡣ࣐࢖ࢡࣟࢳࣕࢿࣝࣉ࣮ࣞ
ࢺ㸦MCP㸧ࢆ⏝࠸ࠊTOF ἲ࡟ࡼࡾ࢖࢜ࣥ✀ࡢ m/z ࡢྠᐃࢆ⾜࠺ࠋᮏ◊✲࡛ࡣࠊຍ㏿ჾᐇ㦂ࡢணഛᐇ㦂࡜ࡋ࡚ࠊ࣮ࣞࢨ࣮࡟ࡼࡿ࢔
ࣈ࣮ࣞࢩ࡛ࣙࣥ࢖࢜ࣥࢆⓎ⏕ࠊຍ㏿ࡉࡏࡿᐇ㦂ࢆ⾜ࡗ࡚࠾ࡾࠊࡇࡢ⤖ᯝࢆ⏝࠸࡚⿦⨨ࡢ᭱㐺໬ࢆ⾜ࡗࡓࠋຍ㏿ჾᐇ㦂ࡣ J-PARC
ࡢ MUSE D2 ࣏࣮ࢺ࡟࡚⾜࠸ࠊ20 ~ 40 MeV/cᅗ䠍㻌 䝭䝳䜸䞁ཎᏊྲྀ䜚ฟ䛧⿦⨨䛾ᴫせ㻌ࡢ࣑ࣗ࢜ࣥࣅ࣮࣒ࢆࢱ࣮ࢤࢵࢺ࡟↷ᑕࡋࠊ
Ⓨ⏕ࡋࡓ࢖࢜ࣥ✀ࢆ MCP ࡛ほ ࡋࡓࠋ䛆⤖ᯝ䛇 ࣮ࣞࢨ࣮ࢆ⏝࠸ࡓணഛᐇ㦂࡟࠾࠸࡚ࠊ㖡ᯈࢆヨᩱ࡜ࡋࡓ࡜ࡁࡢ TOF ࢫ࣌ࢡࢺࣝࢆᅗ㸰࡟♧ࡍࠋᶓ㍈ࡣ m/z ࡟⿵ṇࡋ࡚࠸ࡿࠋࢫ࣌ࢡࢺࣝࡼࡾ 63Cu ࡜ 65Cu ࡢྠ఩యࡀ
༊ู࡛ࡁࠊศゎ⬟ R=300 ࢆᐇ⌧࡛ࡁࡓࠋㅮ
₇࡛ࡣࠊࡑࡢ௚ࠊຍ㏿㟁ᅽࡢㄪᩚ࡟ࡼࡿࣅ
࣮࣒ࡢ㧗཰⋡໬࡞࡝ࠊᐇ㦂ࢩࢫࢸ࣒ࡢ᭱㐺໬࡟ࡘ࠸࡚㆟ㄽࡍࡿࠋࡲࡓࠊຍ㏿ჾᐇ㦂࡛ᅗ䠎㻌 㖡ᯈ䜈䛾䝺䞊䝄䞊↷ᑕ䛻䜘䜛䜲䜸䞁Ⓨ⏕䞉ຍ㏿ᐇ㦂䛾ᚓࡽࢀࡓணഛⓗ࡞⤖ᯝ࡟ࡘ࠸࡚ࡶሗ࿌ࡍࡿࠋ 㼀㻻㻲 䝇䝨䜽䝖䝹㻌
Muonic atom extraction experiment by using intense negative muon beam at J-PARC MUSE
YOSHIDA, G., NINOMIYA, K., INAGAKI, M., TOYODA, M., AOKI, J., KAWAMURA, N.,
MIYAKE, Y., SHINOHARA, A.

- 117 -

࣓ࢫࣂ࢘࢔࣮ศගἲ࡟ࡼࡿࢥࣥࢻࣛ࢖ࢺ㝹▼୰ࡢ㕲ྵ᭷㖔≀⤌ᡂࡢ◊✲

P38㔠ἑ኱㝔⮬↛ ࠊ㔠ἑ኱⌮ᕤ ࠊ㤳㒔኱㝔⌮ᕤ  ‫ۑ‬୰ᕝ┿⤖ ࠊຍ⣡ᗣ኱ ࠊబ⸨΅ ࠊࠊᾏ⪁ཎ඘ ࠙⥴ゝࠚࢥࣥࢻࣛ࢖ࢺ㝹▼ࡣኴ㝧⣔⏕ᡂ᫬ࡢẕኳయࡢ≧ែࢆಖᏑࡋ࡚࠾ࡾࠊ୰࡛ࡶ୺ᡂศඖ⣲ࡢࡦ࡜ࡘ࡛࠶ࡿ㕲ࡣࠊẕኳయࡢ⏕ᡂ㐣⛬࡟ᛂࡌ࡚ᵝࠎ࡞໬Ꮫᙧࢆ࡜ࡿࠋࡑࡢࡓࡵࢥࣥࢻࣛ࢖ࢺ㝹▼୰ࡢ㕲ྵ᭷㖔≀ࡢ◊✲ࡣࠊẕኳయࢆྲྀࡾᕳࡃ⎔ቃࢆ▱ࡿୖ࡛኱ኚ㔜せ࡛࠶ࡿࠋᮏ◊✲࡛ࡣ㖔≀⤌ᡂࡢ␗࡞ࡿࢥࣥࢻࣛ࢖ࢺ㝹▼ࢆ 57Fe ࣓ࢫࣂ࢘࢔࣮ศගἲ࡛ㄪ࡭ࠊ㕲ࡢ≧ែゎᯒࢆ⾜ࡗࡓࠋࡲࡓࠊ57Fe ࣓ࢫࣂ࢘࢔࣮ศග

ᐃࡣࠊᩘⓒ mg ࡢヨᩱࡀ࠶ࢀࡤࡼ࠸ࡇ࡜ࡸࠊ㠀◚ቯ࡛ࡢ ᐃࡀྍ⬟࡛࠶ࡿࡓࡵࠊ㈗㔜࡞ヨᩱ࡛࠶ࡿ㝹▼ࡢ㖔≀⤌ᡂࢆㄪ࡭ࡿୖ࡛᭱ࡶ㐺ࡋࡓᡭἲࡢ࠺ࡕࡢ 1ࡘ࡛࠶ࡿࠋᮏ◊✲࡛ࡣࡇࢀࡽࡢ฼Ⅼࢆά࠿ࡋࠊ࣓ࢫࣂ࢘࢔࣮ࢫ࣌ࢡࢺࣝࡢࡳ࡛ᚓࡽࢀࡿ᝟ሗ
࠿ࡽከ✀ከᵝ࡟Ꮡᅾࡍࡿࢥࣥࢻࣛ࢖ࢺ㝹▼ࡢ໬Ꮫⓗศ㢮ἲࡢ☜❧ࢆ┠ᣦࡋࡓࠋ࠙ᐇ㦂ࠚ
ᬑ㏻ࢥࣥࢻࣛ࢖ࢺ࡛࠶ࡿ Saratov㸦L4㸧࡜Ⅳ⣲㉁ࢥࣥࢻࣛ࢖ࢺ࡛࠶ࡿ Allende㸦CV3㸧ࢆࠊࡑࢀ
ࡒࢀ㏱㐣ᆺ 57Fe ࣓ࢫࣂ࢘࢔࣮ศගἲ࡟ࡼࡾࠊᐊ ࡛ᐊᐃࡋࡓࠋᚓࡽࢀࡓࢫ࣌ࢡࢺࣝࡣȘFe ࡢࢫ࣌ࢡࢺࣝ࡟ࡼࡾ㍑ṇࢆ⾜ࡗࡓࠋ࠙⤖ᯝ࡜⪃ᐹࠚ
ᐊ࡟࠾ࡅࡿ Saratov ࡢ࣓ࢫࣂ࢘࢔࣮ศග

ᐃࡢ⤖ᯝࠊࢫ࣌ࢡࢺࣝࡢᡂศẚࡣࢥࣥࢻࣛ࢖ࢺࡢ

୺せ㖔≀࡜ࡋ࡚▱ࡽࢀࡿ OlivineࠊPyroxeneࠊTroiliteࠊFe-Ni㸦Kamacite or Taenite㸧࡟ຍ࠼࡚ࠊ
㖔≀ࡀ≉ᐃ࡛ࡁ࡞࠸ Fe3+ࡢࢲࣈࣞࢵࢺࡀ 6.7㸣Ꮡᅾࡋࡓࠋᆅୖ࡛ࡢ㓟໬㖔≀࡛࠶ࢀࡤప ࡛☢
Ẽศ⿣ࡀ⏕ࡌࡿ࡜⪃࠼ࠊ⌧ᅾ 6 K ࡛ ᐃࢆ⾜ࡗ࡚࠸ࡿࠋAllende ࡟ࡘ࠸࡚ࡶྠᵝ࡟ ᐃࠊゎᯒࢆ⾜ࡗࡓࠋᮏ◊✲ࡢᐃ⤖ᯝ࡞ࡽࡧ࡟ࠊ᪤ሗࡢᩥ⊩࡟グ㍕ࡉࢀ࡚࠸ࡿᵝࠎ࡞ࢥࣥࢻࣛ࢖ࢺ㝹▼㸦ᆅୖ࡛ࡢ㓟໬ࡀᑡ࡞࠸ࡶࡢ㸧ࡢ࣓ࢫࣂ࢘࢔࣮ࣃ࣓࣮ࣛࢱ࣮࡟ᇶ࡙࠸࡚ࠊᶓ㍈࡟㓟໬ⓗ㖔≀㸦sillicateࠊoxide㸧୰ࡢ㕲ࡢཎᏊᩘẚࠊ⦪㍈࡟㑏ඖⓗ㖔≀㸦Fe-NiࠊTroilite㸧୰ࡢ㕲ࡢཎᏊᩘẚࢆࣉࣟࢵࢺࡋࡓ࡜ࡇࢁ㸦Fig.1㸧ࠊ໬Ꮫⓗศ㢮ࡢྍ⬟ᛶࢆ♧၀ࡍࡿ⤖ᯝࡀᚓࡽࢀࡓࠋC ࢥࣥࢻࣛ࢖ࢺ࡟㛵ࡋ࡚ࡣ㝹▼࡟ࡼࡾ኱ࡁ࡞ࡤࡽࡘ
ࡁࡀ࠶ࡾࠊࡇࡢࣉࣟࢵࢺࡔࡅ࡛ࡣ௚ࡢࢥࣥࢻࣛ࢖ ࢺ ࡜ ࡢ ุ ู ࡀ ᅔ 㞴 ࡛ ࠶ ࡿ ࡀ ࠊ Olivine ࡜
Pyroxene ୰ࡢ㕲࡟㛵ࡋ࡚ྠᵝࡢ┦㛵ࢆㄪ࡭ࡿࡇ࡜࡟ࡼࡾࠊᬑ㏻ࢥࣥࢻࣛ࢖ࢺ㸦HࠊLࠊLL㸧࡜ࡢุูࡀྍ⬟࡛࠶ࡿࡇ࡜ࡀศ࠿ࡗࡓࠋⓎ⾲࡛ࡣ௚ࡢᵝࠎ࡞ศ㢮ἲ࡟ࡘ࠸࡚ࡶᥦ᱌ࡍࡿࠋ

Fig.1 㓟໬ⓗ㖔≀࡜㑏ඖⓗ㖔≀ࡢ Fe ཎᏊᩘẚࡢ┦㛵

Mössbauer Spectroscopic Study on the Composition of Fe-containing Chondrites
NAKAGAWA, M., KANO, Y., SATO, W., EBIHARA, M.,- 118 -

㫽ᾏᒣ㯄ᇙᮌཬࡧࡑࡢ⅊࡟ྵࡲࢀࡿ㕲ࡢ໬Ꮫ≧ែ

P39⛅┴኱ᮌ◊ ࠊᡂ㋣኱⌮ᕤ ࠊ኱ྠ኱ᩍ㣴  ‫ۑ‬ᒣෆ⦾ ࠊᰩᮏᗣྖ ࠊᒣ"ᓫஅ ࠊ㓇஭㝧୍ 䛆⥴ゝ䛇 ᇙᮌ㸦࠺ࡶࢀࡂ㸧࡜ࡣࠊᆅ୰࡟㛗ᮇ㛫ᇙࡶࢀኚᛶࡋࡓᶞᮌ࡛࠶ࡿࠋኚᛶࡣᇙἐ᮲௳࡟
኱ࡁࡃᙳ㡪ࡉࢀࡿࡀࠊᇙἐᮇ㛫ࡀẚ㍑ⓗ▷࠸ሙྜࡣࠊᮌᮦ࡜ࡋ࡚ࡢ≀⌮ⓗᛶ㉁ࢆಖᣢࡋࡓࡲ
ࡲ㔜ཌ࡞Ⰽㄪࢆ࿊ࡍࡿࡓࡵࠊᘓᮦࡸᕤⱁရࡢᮦᩱ࡜ࡋ࡚㧗್࡛ྲྀᘬࡉࢀࡿࠋᇙᮌࡣ⏕ᮌ࡟ẚ࡭ࠊ㕲ࢆከ㔞࡟ྵ᭷ࡋ࡚࠸ࡿࡇ࡜ࡀከࡃࠊ⊂≉ࡢⰍㄪࡣ㕲࡟㉳ᅉࡍࡿ࡜᥎ᐃࡉࢀ࡚࠸ࡿࡀࠊ
ࡑࡢ໬Ꮫ≧ែ࡟㛵ࡍࡿሗ࿌ࡣࢃࢀࢃࢀࡢணഛⓗ࡞◊✲  ࢆ㝖࠸࡚࡯࡜ࢇ࡝࡞࠸ࠋࡲࡓࠊᇙᮌ
ࢆ↝࠸ࡓ⅊ࡣࠊ㤶⅔⅊ࡢ᭱㧗⣭ရ࡜ࡋ࡚⌋㔜ࡉࢀ࡚࠸ࡓࡀࠊ≀⌮໬Ꮫⓗᛶ㉁ࡀㄪ࡭ࡽࢀࡓࡇ
࡜ࡣ࡞࠿ࡗࡓࠋᮏሗ࿌࡛ࡣࠊᇙᮌཬࡧᇙᮌ⅊୰ࡢ㕲ࡢ໬Ꮫ≧ែ࡟㛵ࡋࠊ࣓ࢫࣂ࢘࢔࣮ศගἲ
࡟ࡼࡗ࡚ᚓࡽࢀࡓ▱ぢࢆⓎ⾲ࡍࡿࠋ䛆ᐇ㦂䛇 ヨᩱࡣࠊ⣙ 2500 ᖺ๓ࡢ㫽ᾏᒣᒣయᔂቯࡢ㝿࡟ᇙἐࡋࠊ2015 ᖺ࡟⛅⏣┴࡟࠿࡯ᕷ࡛Ⓨ᥀ࡉࢀࡓࢫࢠࠊࢣࣖ࢟ࠊࢼࣛࠊࢡࣜࡢᇙᮌ࡛࠶ࡿࠋᇙᮌᶞᖿ㒊ࢆ࣮࣑࡛࣎ࣝࣝ⢊○ࡋࠊ18.5 meshࡢࣇࣝ࢖ࢆ㏻㐣ࡉࡏࡓ⢊యࢆࠊ105 oC ࡛ 24 ᫬㛫஝⇱ࡋࡓᚋࠊྛ ᐃ࡟౪ࡋࡓࠋࡲࡓࠊ஝⇱ᚋࡢ⢊యࢆ㟁Ẽ⅔ෆ࡛ࠊ✵Ẽ୰ 24 ᫬㛫 600 oC ࡛ຍ⇕ࡋ࡚⅊໬ࡋࡓࠋ57Fe ࣓ࢫࣂ࢘࢔࣮ࢫ࣌ࢡࢺࣝ ᐃ (⥺※: 57Co(Rh)ࠊᇶ‽: Į-Fe)࡟ࡣ Topologic Systems MD-222B Mössbauer spectrometerࢆ⏝࠸ࡓࠋࡑࡢእࠊ⺯ග X ⥺ࠊIR/PASࠊ࣐ࣛࣥศගࠊ㟁Ꮚ㢧ᚤ㙾ほᐹ➼ࡢศᯒࢆ⾜ࡗࡓࠋ䛆⤖ᯝ䛸⪃ᐹ䛇 ᅗ 1 ࡟ྛᇙᮌ⅊ࡢ 78K ࡟࠾ࡅࡿ࣓ࢫ
ࣂ࢘࢔࣮ࢫ࣌ࢡࢺࣝࢆ♧ࡍࠋᕥୖ࡟ྛ⅊୰ࡢ Fe/Caẚࢆグࡋࡓࠋ࠸ࡎࢀࡢࢫ࣌ࢡࢺ࡛ࣝࡶ」ᩘࡢ☢Ẽᡂศࡀほࡉࢀࠊࢫࢠ࡜ࢣࣖ࢟ࡢ⅊࡛ࡣࢲࣈࣞࢵࢺࡶ

⌧ࢀ࡚࠸ࡿࠋࢼࣛᇙᮌ⅊࡛ࡣ Į-Fe2O3 ࡟ᑐᛂࡍࡿ྾
཰ࡀ☜ㄆࡉࢀࡓࠋࢫ࣌ࢡࢺࣝゎᯒࡣ⌧ᅾࡶ㐍⾜୰࡛࠶ࡿࡀࠊࢣࣖ࢟⅊ࡢ☢Ẽᡂศࣃ࣓࣮ࣛࢱࡣ Ca2Fe2O5
࡟㏆ࡃࠊࡲࡓᐊ ࡢࢫ࣌ࢡࢺࣝ࡜ࡢẚ㍑࠿ࡽࡣࢼࣛࠊ
ࢡࣜࡢ⅊࡟ࡣ CaFe2O4 ࡀྵࡲࢀ࡚࠸ࡿྍ⬟ᛶࡀ♧၀ࡉࢀࡓࠋ୍᪉ࠊᇙᮌ⮬యࡢ࣓ࢫࣂ࢘࢔࣮

ᐃ࡛ࡣࢣࣖ࢟ࠊ

ࢼࣛࠊࢡ࡛ࣜࡣぢ࠿ࡅୖࠊ1 ⤌ࡢࢲࣈࣞࢵࢺࡀほࡉࢀࠊ㕲ࡣ 3 ౯㧗ࢫࣆ࡛ࣥࠊࢱࣥࢽࣥ࡜ከ᰾㘒యࢆ

ᅗ 1 ᇙᮌࡢ 78K ࡟࠾ࡅࡿ࣓ࢫࣂ࢘࢔
࣮ࢫ࣌ࢡࢺࣝ

ᙧᡂࡋ࡚࠸ࡿࡇ࡜ࡀ᥎ᐃࡉࢀࡓࠋ
࠙ㅰ㎡ࠚ࡟࠿࡯ᕷᩍ⫱ጤဨ఍࠿ࡽᇙᮌヨᩱࡢᥦ౪ࢆཷࡅࡓࠋㅽࢇ࡛ㅰពࢆ⾲ࡍࠋ
[1] S. Yamauchi et al., J. Wood Sci., 57(6), 549-552(2011)

Chemical states of iron in the ancient woods excavated from the foothills of Mt. Chokai and their
ashes
YAMAUCHI, S., KURIMOTO, Y., YAMAGISHI, T., SAKAI, Y.

- 119 -

ġ3

 6U 6Q [ )H [ 2  䛾☢Ẽ≉ᛶ䛻ཬ䜌䛩 &D 䛾⨨᥮ຠᯝ 㻌㻔᫂኱㝔⌮ᕤ 㻝 䚸⌮⛉኱ 㻞 䚸ᮾ኱ 㻟 㻕㻌䚽㕥ᮌⱱୡ 㻝 䚸Ỉ἟୔ྐ 㻝 䚸㔝ᮧ㈗⨾ 䠍䠈㻞 䚸ᒸ⃝ཌ 㻟 䚸ᑠụ⿱ஓ 㻝 㻌Ms( emu/g)䛆⥴ ゝ䛇㻌 㻌 ࡇ ࢀ ࡲ ࡛  6U6Q2   ࣌ ࣟ ࣈ ࢫ ࢝ ࢖ ࢺ 㓟 ໬ ≀ ༙ ᑟ య ࢆ ⏝ ࠸ ࡚  )H ࢆ ᑡ 㔞 ⨨ ᥮ ࡋ ࡓᕼⷧ☢ᛶ༙ᑟయࡢ◊✲ࠊ㛤Ⓨࢆ⾜ࡗ࡚ࡁࡓࠋ࠶ࡿ୍ᐃ௨ୖࡢ )H ࢆ⨨᥮ࡍࡿ࡜ࠊᐊ ࡛ẚ㍑ⓗ኱ࡁ࡞ᙉ☢ᛶࢆ♧ࡍࡇ࡜ࡀศ࠿ࡗࡓࠋ)H ࡣ  ౯࡜ࡋ࡚ 6Q   ࡟⨨᥮ࡍࡿࡢ࡛ࠊ
࣌ࣟࣈࢫ࢝࢖ࢺ࡟㓟⣲Ḟ㝗ࡀ⏕ࡌ࡚࠸ࡿ࡜⪃࠼ࡽࢀࡿࠋ௒ᅇࠊ$ ࢧ࢖ࢺࡢ⨨᥮࡟ࡼࡿ☢
Ẽ≉ᛶ࡟୚࠼ࡿᙳ㡪ࢆㄪ࡭ࡿࡇ࡜ࢆ┠ⓗ࡜ࡋࠊ)H ࡢ⃰ᗘࢆ  ࡟୍ᐃῧຍࡋࡓ 6U6Q2  ࡟ᑐࡋࠊ6U ࢧ࢖ࢺ࡟⃰ᗘࡢ␗࡞ࡿ &D ࢆ⨨᥮ࡉࡏࡓ࣌ࣟࣈࢫ࢝࢖ࢺ㓟໬≀ࢆస〇ࡋࡓࠋࡇࢀࡽࡢᚤ⣽ᵓ㐀ゎᯒࢆ⾜ࡗࡓ⤖ᯝࢆ♧ࡍࠋ䛆ᐇ㦂䛇㻌 㻌 0 ࡢ 6U ཬࡧ 6Q ࡢ⁐ᾮࠊ 0 ࡢ &D )H ཬࡧ  )H ࡢྛ⁐ᾮ࡜ࠊࢡ࢚ࣥ
㓟࡜࢚ࢳࣞࣥࢢ࣮ࣜࣝࢆΰྜࡋ࡚ࠊᡤᐃࡢ๭ྜ࡛⁐ᾮࢆㄪᩚࡋࡓࠋ
࣍ࢵࢺࣉ࣮ࣞࢺࢆ⏝࠸࡚⁐ᾮ⃰⦰࡜᭷ᶵ≀ࡢศゎࢆ⾜ࡗࡓᚋࠊq& ࡛  ᫬㛫ࠊq&࡛   ᫬ 㛫 ↝ ᡂ ࡋ ࡚    )H ࢆ ྵ ࡴ ⢊ ᮎ ヨ ᩱ)H ⃰ᗘࡀ  &D ⃰ᗘࡀ     ࢆస〇ࡋࡓࠋ; ⥺ᅇᢡ ;5' ࠊヨᩱ᣺ືᆺ☢ຊィ 960 ࠾ࡼࡧ  )H ࡢ࣓ࢫࣂ࢘࢔࣮ศග ᐃࢆ⾜ࡗࡓࠋ䛆⤖ᯝ ཬ䜃⪃ ᐹ䛇㻌 㻌 ;5' ࡟ ࡼ ࡾ ࠊ ඲ ࡚ ࡢ ヨ ᩱ࡛  6U6Q2   ࡢ ࣌ ࣟ ࣈ ࢫ ࢝ ࢖ ࢺ 㓟 ໬ ≀ ࡛ ࠶ ࡿ ࡇ࡜ࢆ☜ㄆࡋࠊࡑࡢ⤖ᬗᏊࡢ኱ࡁࡉࡣࠊ┤ᚄ⣙ ±QP ࡛࠶ࡗࡓࠋࡑࡢ᱁Ꮚᐃᩘࡣ &D ࡢ⃰ᗘ        ࡜࡜ࡶ࡟ῶᑡࡍࡿഴྥࢆ♧ࡋࡓࠋࡇࢀࡣ 6U ࡜&DFRQF
&D ࡢ࢖༙࢜ࣥᚄࡢᕪࡼࡿࠋࡲࡓࠊ)H ࡀ  ྵࡲࢀ࡚࠸ࡿࡓࡵࠊࡍ࡭࡚ࡢヨᩱ࡛ᙉ☢ᛶࢆ♧ࡋ
Fig. 1 Saturation magnetization ofࡓࠋᅗ㸯ࡢࡼ࠺࡟ &D ࢆྵࡲ࡞࠸ヨᩱࡢ㣬࿴☢
Sr (1-x) Ca (x) Sn 0.92 Fe 0.08 O 3-G .
໬ ⋡ ࡣ ⣙   HPXJ ࡟ ᑐ ࡋ ࡚ ࠊ &D ⃰ ᗘ ࡀ    ⨨᥮ࡋࡓ᫬ࠊᖹᆒ HPXJ ࡛࠶ࡾࠊ&D ⃰ᗘࡀ  ࡢ᫬  HPXJ ࡜࡞ࡗࡓࠋ㣬࿴☢໬ࢺ࡟ ⨨ ᥮ࡍ ࡿࡇ ࡜ ࡛༢ ఩᱁ Ꮚ ࡀ⦰ ᑠࡋ ࠊ ☢Ẽ≉ᛶࡢྥୖࡀྥୖࡍࡿࡇ࡜ࡀศ࠿ࡗࡓࠋࡓࡔࠊ )H ࢆྵࡴ࣓ࢫࣂ࢘࢔࣮ࢫ࣌ࢡࢺࣝࡢ☢Ẽศ⿣ᡂศࡢᙉᗘࡣࠊᅗࡢ  ࡼ࠺࡟ &D ࢆྵࡲ࡞࠸ሙྜࡼࡾᑠࡉࡃ࡞ࡗࡓࠋࡇࢀࡣ༢఩᱁Ꮚࡀ
⦰ࡵࡽࢀࠊ)H  ཎᏊྠኈࡢ☢Ẽⓗ┦஫స⏝ࡼࡾࡶ᱁ᏊࡢḞ㝗࡞࡝࡟ࢺࣛࢵࣉࡍࡿ㟁Ꮚ࡟ࡼࡗ
,QWHQVLW\UDWLR⋡ࡣ &D ⃰ᗘ࡟ࡼࡾቑຍࡋࡓࠋ&D ࡣ 6U ࢧ࢖ D E࡚ㄏ㉳ࡉࢀࡿ☢ᛶࡀ኱ࡁࡃᐤ୚ࡋ࡚࠸ࡿ࡜⪃&D


9HORFLW\ PPV

)LJ  )H0RVVEDXHUVSHFWUDRI6U [ &D [ ࠼ࡽࢀࡿࠋ

6Q  )H  2 G  D [  E  

Calcium substitution effect on the magnetic properties of Sr(Sn(1-x)Fex)O3-GSUZUKI. S, MIZUNUMA. T, NOMURA. K, OKAZAWA. A, KOIKE. Y- 120 -

P41

㧗ẚᨺᑕ⬟䝥䝻䝯䝏䜴䝮ෆໟ䝣䝷䞊䝺䞁ྜᡂ䛻ྥ䛡䛯䚸䝥䝻䝯䝏䜴䝮䛾ศ㞳⢭〇㻌㤳㒔኱㝔⌮ᕤ ࠊᮾ໭኱㟁Ꮚගࢭ  ‫ۑ‬ᐑෆ⩧ဢ ࠊ⛅ᒣ࿴ᙪ ࠊ⳥Ọⱥᑑ ࠊஂ෠ᮌᚿ㑻 

࠙⥴ゝࠚ㔠ᒓෆໟࣇ࣮ࣛࣞࣥࡣࠊࣇ࣮ࣛࣞࣥෆ㒊࡟ࣛࣥࢱࣀ࢖ࢻඖ⣲࡞࡝ࡢ㔠ᒓඖ⣲ࡀໟ᥋ࡋ࡚࠸ࡿ໬ྜ≀࡛࠶ࡿࠋᡃࠎࡣࢧ࣐࣒ࣜ࢘(Sm)ࢆᶆⓗ࡜ࡋࡓග᰾཯ᛂ࡛⏕ࡌࡓࣉ࣓ࣟࢳ࣒࢘
-143(143Pm)ࢆ⏝࠸ࡿࡇ࡜࡛ࠊࡇࢀࡲ࡛ሗ࿌ࡉࢀ࡚ࡇ࡞࠿ࡗࡓࣉ࣓ࣟࢳ࣒࢘ෆໟࣇ࣮ࣛࣞࣥ
(Pm@C2n)ࡢྜᡂ࡟ᡂຌࡋࠊPm ࡀ C82 ࢣ࣮ࢪෆ࡛ 3 ౯࡛࠶ࡿࡇ࡜ࢆ᫂ࡽ࠿࡟ࡋࡓࠋࡋ࠿ࡋࠊྜ
ᡂࡋࡓ 143Pm@C2n ࡣẚᨺᑕ⬟ࡀపࡃࠊࡑࢀ௨ୖࡢヲ⣽ࢆㄪ࡭ࡿࡇ࡜ࡀฟ᮶࡞࠿ࡗࡓࠋPm@C2n
ࡢヲ⣽࡞ᛶ㉁ࢆㄪ࡭ࡿ࡟ࡣ㧗࠸ẚᨺᑕ⬟ࢆࡶࡘ 143Pm ࢆྜᡂ࡟⏝࠸ࡿᚲせࡀ࠶ࡿࡇ࡜࠿ࡽࠊ
ᶆⓗ࡜ࡋࡓ Sm ࡢศ㞳ࡀ୙ྍḞ࡛࠶ࡿࠋᮏ◊✲࡛ࡣ༑ศ࡞ẚᨺᑕ⬟ࢆᣢࡘ 143Pm ࢆᚓࡿࡓࡵ࡟
㝧࢖࢜ࣥ஺᥮ࢡ࣐ࣟࢺࢢࣛࣇ࢕࣮࡟ࡼࡗ࡚ 143Pm ࡢศ㞳⢭〇ࢆ⾜ࡗࡓࠋ
Table. 1 ศ㞳᮲௳࠙ᐇ㦂ࠚ10 Imm ࡢ࣌ࣞࢵࢺ≧࡟ࡋࡓ 1 g ࡢ Sm2O3 ࢆᮾ໭
Inertsil CX (4.6 I×250 mm)࣒࢝ࣛ኱Ꮫ㟁Ꮚග⌮Ꮫ◊✲ࢭࣥࢱ࣮࡟࠾࠸࡚ࠊ᭱኱࢚ࢿࣝࢠ࣮50 ⁐㞳ᾮ
0.2 M a-ࣄࢻࣟ࢟ࢩ࢖ࢯ㓗㓟(pH=3.79)
0.5 mL/min
MeV ࡢไືᨺᑕ⥺ࢆ 6 ᫬㛫↷ᑕࡍࡿࡇ࡜࡛ࠊ143Pm ࢆ〇㐀 ⁐㞳ᾮὶ㔞཯ᛂᾮ
0.2 mM 4-(2-ࣆࣜࢪࣝ࢔ࢰ)ࣞࢰࣝࢩࣀ࣮ࣝ
2 M NH4OH
ࡋࡓࠋ↷ᑕࡋࡓヨᩱࡢ࠺ࡕ 0.8 g ࢆ 8 mL ࡢ⃰ሷ㓟࡟⁐ゎࡋࠊ
1 M CH3COONH4ࡇࡇ࠿ࡽ 10 PL ࢆศྲྀࡋ࡚ 0.1 M ሷ㓟࡛ 1000 ಸ࡟ᕼ㔘ࡍࡿ ཯ᛂᾮὶ㔞 0.5 mL/minCࡇ࡜࡛ศ㞳⏝ࡢヨᩱ࡜ࡋࡓࠋࡇࡢㄪ〇ࡋࡓヨᩱࡢ࠺ࡕ 1 mL ᜏ᳨ฟჾᵴ ᗘ 50UV/vis
᳨ฟჾ
530 nmࢆ⏝࠸࡚㝧࢖࢜ࣥ஺᥮ࢡ࣐ࣟࢺࢢࣛࣇ࢕࣮ࢆ⾜ࡗࡓࠋ㝧࢖ ᳨ฟἼ㛗
1 mL
ヨᩱὀධ㔞
࢜ࣥ஺᥮ࢡ࣐ࣟࢺࢢࣛࣇ࢕࣮ࡢศ㞳᮲௳ࢆ Table. 1 ࡟♧ࡋࡓࠋ࣒࢝ࣛࡣᙉ㓟ᛶ㝧࢖࢜ࣥ஺᥮࣒࢝ࣛ Inertsil CX ࢆ⏝࠸ࠊ
1.5
0.5࢔ࣥࣔࢽ࢔Ỉ࡛ pH ࢆㄪᩚࡋࡓ 0.2 M D-ࣄࢻࣟ࢟ࢩ࢖ࢯ㓗㓟Vis. absorption
Sm-145
Pm-1431.2
0.4(pH=3.79)ࢆ⁐㞳ᾮ࡜ࡋ࡚⏝࠸ࡓࠋࡲࡓࠊ࣏ࢫࢺ࣒࢝ࣛヨ⸆࡜ࡋ࡚ 4-(2-ࣆࣜࢪࣝ࢔ࢰ)ࣞࢰࣝࢩࣀ࣮ࣝ(PAR)ࢆ⏝࠸࡚ Sm
0.9
0.3
࢖࢜ࣥࢆⓎⰍࡉࡏࠊUV/vis ᳨ฟჾ࡟࡚ 530 nm ࡢ྾ගᗘࢆࣔ
0.6
0.2
ࢽࢱࡍࡿࡇ࡜࡛ࢡ࣐ࣟࢺࢢ࣒ࣛࢆᚓࡓࠋಖᣢ᫬㛫 0-40 ศࡢ
0.3
0.1⁐ฟᡂศ࡟ࡘ࠸࡚ࡣ 2 ศࡈ࡜࡟ศ⏬ࡋࠊGe ༙ᑟయ᳨ฟჾ࡟00
࡚J⥺ ᐃࢆ⾜ࡗࡓࠋ0
5
10 15 20 25 30 35 40
Retention time [min]࠙⤖ᯝࠚFig. 1 ࡟㝧࢖࢜ࣥ஺᥮ࢡ࣐ࣟࢺࢢ࣒ࣛཬࡧ⁐ฟᡂศࡢᨺᑕ⬟ࢆ ᐃࡋࡓ⤖ᯝࢆ♧ࡋࡓࠋࢡ࣐ࣟࢺࢢ࣒ࣛ࠿ࡽಖᣢ Fig. 1 㝧࢖࢜ࣥ஺᥮ࢡ࣐ࣟࢺ
ࢢ࣒ࣛཬࡧศ⏬ࡢᨺᑕ⬟᫬㛫ࡀ 18-22 ศࡢ㛫࡛ Sm ࡢ⁐ฟࡀ☜ㄆࡉࢀࡓࠋᨺᑕ⬟ ᐃRadioactivity [cps]UV intensity [V]oࡋࡓ⤖ᯝ࠿ࡽಖᣢ᫬㛫 18-22 ศࡢศ⏬࡛ࡣ Sm ࡢࡳࡀࠊ 22-30 ศࡢศ⏬࡛ࡣ Pm ࡢࡳࡀ᳨ฟࡉ
ࢀࠊศ㞳ᚋࡢ 143Pm ࡢᅇ཰⋡ࡣ 94.7%࡛࠶ࡗࡓࠋᨺᑕ⬟ ᐃࡢ⤖ᯝࢆࡶ࡜࡟ࣆ࣮ࢡࣇ࢕ࢵࢸ࢕
ࣥࢢࢆ⾜࠸ Sm ࡜ Pm ࡢศ㞳ᗘࢆồࡵࡿ࡜ Rs=1.65 ࡜࡞ࡗࡓࠋ143Pm ࢆ 22-30 ศࡲ࡛ศྲྀࡋࡓሙ
ྜࠊPm ศ⏬࡟ΰධࡍࡿ Sm ࡣ඲యࡢ࠺ࡕࡢ 0.06㸣⛬ᗘ࡜ぢ✚ࡶࡽࢀࠊ143Pm ࡢẚᨺᑕ⬟ࡣ⣙1700 ಸ࡜࡞ࡿࡓࡵࠊศ㞳࡟ࡼࡾ Pm@C2n ྜᡂ࡟༑ศ࡞ẚᨺᑕ⬟ࢆᣢࡘ 143Pm ࡀᚓࡽࢀࡿࡇ࡜
ࡀศ࠿ࡗࡓࠋ

Separation and purification of Pm for Pm@C2n synthesis with higher specific radioactivity
MIYAUCHI, S., AKIYAMA, K., KIKUNAGA, H., KUBUKI, S.

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䢢

P42ࣔࣜࣈࢹࣥࡢྠ఩యศ㞳ಀᩘ࡟ᑐࡍࡿ౯ᩘ౫Ꮡᛶ
㛗ᒸᢏ⛉኱㝔ᕤ ࠊᮾᕤ኱ඛᑟཎᏊ⅔◊ ࠊ㏆኱⌮ᕤ  ‫ⰼ❧ۑ‬ඃ ࠊ㔠ᩜ฼㝯 ࠊ㔝ୖ㞞ఙ ࠊ㕥ᮌ㐩ஓ ࠊ㔝ᮧ㞞ኵ ࠙⥴ゝࠚ⌧ᅾࡢ᰾་Ꮫ᳨ᰝ࡟࠾࠸࡚ Tc-99m ࡣ᭱ࡶከ⏝ࡉࢀ࡚࠸ࡿᨺᑕᛶྠ఩ඖ⣲࡛࠶ࡿࠋ
Tc-99m ࡢཎᮦᩱ࡜࡞ࡿ Mo-99 ࡣ Mo-98(n, γ)ࡸ Mo-100(n, 2n)཯ᛂ➼ࢆ⤒࡚ྜᡂ࡛ࡁࡿࡇ࡜࠿
ࡽࠊMo-99 ࡢᅜ⏘໬ࢆ┠ᣦࡋࡓ◊✲㛤ⓎࡀάⓎ࡟⾜ࢃࢀ࡚࠸ࡿࠋ1-3) ᐇ⏝ⓗ࡞⃰⦰ᗘࢆᣢࡘྠ
఩యࢆᚓࡿࡓࡵࡢ໬Ꮫⓗྠ఩యศ㞳ᢏ⾡ࡢ୍ࡘ࡜ࡋ࡚ࠊࢡ࣐ࣟࢺࢢࣛࣇ࢕࣮ἲࡀ▱ࡽࢀ࡚࠸ࡿࡀࠊࡑࡢᡭἲ࡛ࡣ┠ⓗࡢ⃰⦰ᗘࢆᣢࡘྠ఩యࢆᚓࡿࡓࡵ࡟ࡣⳘ኱࡞᫬㛫ࡀ࠿࠿ࡿࠋ2) ౛࠼ࡤࠊ⃰⦰ᗘࡀ 24.2 %࡛࠶ࡿ Mo-98 ࠿ࡽ⣙ 4 ಸࡢ⃰⦰ᗘ(99.0 %)࡜࡞ࡿ Mo ࢆᚓࡿࡓࡵ࡟ࡣ 20ᖺ௨ୖࡢṓ᭶ࡀᚲせ࡜࡞ࡿࠋ2) ࡋ࠿ࡋ࡞ࡀࡽࠊྠ఩యࡢ⃰⦰ຠ⋡ࡢᣦᶆ࡜࡞ࡿྠ఩యศ㞳ಀᩘࡀ⌧ᅾࡢ 100 ಸ࡜࡞ࡿ᪂つゐ፹ⓗ཯ᛂࢆ Mo ࡢྠ఩య஺᥮཯ᛂ୰࡛Ⓨ⌧ࡍࡿࡇ࡜ࡀ࡛ࡁࢀࡤࠊᡤせ᫬㛫ࡣࡓࡗࡓ 110 ᪥࡟▷⦰ࡉࢀࡿࠋᡃࠎࡣࢡ࣐ࣟࢺࢢࣛࣇ࢕࣮ἲࢆ⏝࠸ࡓ Mo ࡢゐ፹ⓗྠ఩యศ㞳ἲࢆᥦ᱌ࡋࠊ」ᩘࡢᶞ⬡࡟ᑐࡍࡿྠ఩యศ㞳ᣲືࢆゎᯒࡋ࡚ࡁࡓࡀࠊ2) ᮍࡔ༑ศ࡞ྠ఩యศ㞳ಀᩘࡣᚓࡽࢀ࡚࠸࡞࠸ࠋᮏ◊✲࡛ࡣࠊMo(V)࡜ Mo(VI)࡜ࡢ㛫ࡢ㓟໬㑏ඖ཯ᛂࢆⓎ⌧ࡉࡏࠊ
㟁Ꮚ஺᥮཯ᛂᶵᵓࢆኚ໬ࡉࡏࡿࡇ࡜࡛ Mo ࡢྠ఩యศ㞳ಀᩘࡢྥୖࢆヨࡳࡓࠋ࠙ᐇ㦂ࠚ1.0 mM (M = mol / L, L = dm3) Mo(VI)ࢆྵࡴ HCl Ỉ⁐ᾮࢆ‽ഛࡋࡓࠋࡑࡇ࡟ࠊ1.5 mM࡜࡞ࡿࡼ࠺࡟ Sn(II)Cl2㺃2H2O ࢆῧຍࡋࠊMo(V)ࢆྵࡴ HCl Ỉ⁐ᾮࢆᚓࡓࠋࡉࡽ࡟ࠊྛ 10 mLࢆྵࡴ࣏ࣜࣉࣟࣆࣞࣥ〇ᐜჾ࡟㝜࢖࢜ࣥ஺᥮ᶞ⬡(ྜᡂࡋࡓ࣋ࣥࢰ࢖࣑ࢲࢰ࣮ࣝᆺᶞ⬡࡜୕⳻໬Ꮫ♫〇 WA20 ᆺཬࡧ PA316 ᆺᶞ⬡ࡢ 3 ✀㢮) 0.50 g ࢆῧຍࡋࠊ
ᐊ᮲௳ୗ࡛ࣂࢵࢳヨ㦂(᣺࡜࠺᫬㛫: 24 h)ࢆ⾜ࡗࡓࠋᖹ⾮ᚋࠊPTFE 〇ࣇ࢕ࣝࢱ࣮ࢆ⏝࠸࡚㝜࢖࢜ࣥ஺᥮ᶞ⬡ࢆྲྀࡾ㝖ࡁࠊࢁᾮࢆᅇ཰ࡋࡓࠋᅇ཰ࡋࡓࢁᾮ࡟ྵࡲࢀࡿ Mo ࡢᐃ㔞ศᯒࡣ ICP-MS(7700x, Agilent)ศᯒἲ࡟
ࡼࡾ⾜ࡗࡓࠋMo ࡢศ㓄ಀᩘ(Kd)ࡣཧ⪃ᩥ⊩(2)࡜ྠᵝࡢィ⟬ᘧࢆ⏝࠸࡚⟬ฟࡋࡓࠋ྾╔ᐇ㦂๓ᚋࡢ㝜࢖࢜ࣥ஺᥮ᶞ⬡ࡢᵓ㐀ゎᯒࡣ FT-IR(IRAffinity-1S, Shimadzu)࡟ࡼࡾ⾜ࡗࡓࠋ࠙⤖ᯝ㺃⪃ᐹࠚᐊ ᮲௳ୗࠊ0.10 - 11.2 M ࡢ HCl Ỉ⁐ᾮ୰࡛㝜࢖࢜ࣥ஺᥮ᶞ⬡ࢆ⏝࠸࡚ Mo(VI)࡜ Mo(V)ࡢ྾╔ᐇ㦂ࢆ⾜ࡗࡓ⤖ᯝࠊ[HCl]T = 0.1 M ࡢ࡜ࡁࠊKd ࡀ᭱኱್ࢆྲྀࡿࡇ࡜ࡀࢃ࠿ࡗࡓࠋࡇࡢ᣺ࡿ⯙࠸ࡣ Mo7O21(OH)33ࡀ⏕ᡂࡋࡓࡇ࡜࡟㉳ᅉࡍࡿࠋ2) ୍᪉ࠊ[HCl]T = 1.0 - 2.0
M ࡛ࡣࠊH3MoO4+ࡀ⏕ᡂࡍࡿࡓࡵࠊKd ࡀ᭱ᑠ್ࢆྲྀࡿ
ࡇ࡜ࡀࢃ࠿ࡗࡓࠋMo(VI)ࢆ V ౯࡟㑏ඖࡍࡿ࡜ࠊ0.1 M
HCl Ỉ⁐ᾮࢆ㝖ࡃ඲ HCl 㡿ᇦ࡛ࠊKd ್ࡀ Mo(VI)࡜ẚ㍑
ࡋ୍࡚᱆⛬ᗘῶᑡࡍࡿࡇ࡜ࡀ☜ㄆ࡛ࡁࡓࠋSn(IV)Cln4-n(n ≥ 5)ࡀ㝜࢖࢜ࣥ஺᥮ᶞ⬡࡜ࡼࡾ㑅ᢥⓗ࡟྾╔ࡋࡸࡍ࠸ࡇ࡜ࡸ(Mo(V)OCl4)2O4-࡜ Sn(IV)Cln4-n (n ≥ 3)ࡀከ᰾㘒యࢆᙧᡂࡋࡓࡶࡢ࡜᥎ ࡉࢀࡿࠋ࠙ཧ⪃ᩥ⊩ࠚ1) Nagai, Y. et al., J. Phys. Soc. Jpn., 78, 1-4(2009), 2) Tachibana, Y. et al., J. Radioanal. Nucl. Chem.,
303, 1429-1434 (2015), 3) Tachibana, Y. et al., “Effect of valence state on chromatographic
fractionation of molybdenum isotope in aqueous hydrochloric acid solution”, Submitted to Prog. Nucl.
EnergyDependence of valence states of molybdenum for its isotope separation coefficients
TACHIBANA, Y., KANESHIKI, T., NOGAMI, M., SUZUKI, T., NOMURA, M.

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P43

㝧㟁Ꮚᨺฟ᰾✀࡟ࡼࡿᅇ㌿య᳨ᰝἲࡢ㛤Ⓨ⌮◊ோ⛉ࢭ ‫⚄ۑ‬ཎṇࠊྜྷ⏣ᩔࠊ⩚ሙᏹග䛆⥴ゝ䛇㻌 㝧㟁Ꮚ᩿ᒙ᧜ᙳἲ(PET)࡜ྠࡌཎ⌮࡛ࡼࡾ⡆౽࡞⿦⨨ࢆ⏝࠸࡚ࠊᅇ㌿ࡍࡿ≀యୖࡢ㝧㟁Ꮚᨺฟ⥺※ࡢ 2 ḟඖศᕸࢆ㠀᥋ゐ࡛ ᐃࡍࡿ᪉ἲࢆ㛤Ⓨࡋ࡚࠸ࡿ[1]ࠋࡑࡢཎ⌮࡜ヨ㦂 ᐃ⤖ᯝࢆ⤂௓ࡍࡿࠋ
䛆ཎ⌮䛇㻌 Ⅼ⥺※ࡢሙྜࢆ౛࡟ ᐃࡢཎ⌮ࢆ
ᅗ 1 ࡟♧ࡍࠋ㐃⥆ᅇ㌿ࡍࡿ≀యୖࡢ Uș ࡢ఩⨨࡟㝧㟁Ꮚᨺฟ᰾✀ࡢⅬ⥺※ࢆ⨨ࡁࠊࡑࡢ୧ഃ࡛ 2 ⤌ࡢ࣐࢞ࣥ⥺᳨ฟჾࢆ ᚟㐠ືࡉࡏ᳨࡚ฟჾࢆ⤖ࡪ⥺㸦LOR㸧࡛ᅇ㌿యࢆࢫ࢟ࣕࣥࡍࡿࠋ㝧㟁Ꮚᾘ⁛Ț⥺ࡢྠ᫬ィ ⋡ࢆᅇ㌿ゅȭ࡜ LOR ࡢኚ఩ࡢ㛵ᩘ࡜ࡋ࡚ ᐃࡍࡿ࡜ᅗ 1 ྑࡢࡼ࠺࡞ࢧ࢖ࣀࢢ࣒ࣛࡀᚓࡽ
ࢀࡿࠋⅬ⥺※ࡢሙྜࡣ᣺ᖜ࡜఩┦ࡀ⥺※఩⨨ Uș ࡟౫Ꮡࡍࡿṇᘻ᭤⥺࡛ࠊ2 ḟඖศᕸࡢᅗ 1㸸Ⅼ⥺※ࡢሙྜࡢᵓᡂ࡜ࢧ࢖ࣀࢢ࣒ࣛ
⥺※࡛ࡣᙉᗘศᕸ࡟ࡼࡿṇᘻ᭤⥺ࡢ㔜ࡡྜࢃࡏ࡟࡞ࡿࠋࡇࡢࢧ࢖ࣀࢢ࣒ࣛ࠿ࡽ RI ࡢ 2 ḟඖศᕸࢆ෌ᵓᡂࡍࡿࡇ࡜ࡀ࡛ࡁࡿࠋ䛆 ᐃ䛇㻌 ヨ㦂 ᐃ⏝࡟⤌ࡳ❧࡚ࡓ⿦⨨ࡢᴫせࡣ௨ୗࡢ㏻ࡾ࡛࠶ࡿࠋ㐃⥆ᅇ㌿ࡍࡿࢱ࣮ࣥࢸ࣮ࣈ
ࣝ㸦┤ᚄ 140mm㸧࡟⥺※ࢆᅛᐃࡋࠊࡑࡢ୧ഃ࡟ᑐྥࡋ࡚タ⨨ࡉࢀࡓ 2 ⤌ࡢ NaI(Tl)᳨ฟჾࢆ୪⾜ ᚟㐠ືࡉࡏ࡞ࡀࡽ 511keV ࣐࢞ࣥ⥺ࢆྠ᫬ィ ࡍࡿࠋྛ᳨ฟჾࡣཌࡉ 3cm ࡢ㖄ᯈ࡟ࡼࡿ
ᖜ 4mm ࡢᆶ┤ࡢࢥ࣓࣮ࣜࢱ࡛ LOR ࡢᖜࢆ㝈ᐃࡍࡿࠋ ᐃ࡛ࡣࢱ࣮ࣥࢸ࣮ࣈࣝୖ࡟Ⅼ≧(35kBq)࡜ᩥᏐᆺ(975 kBq)ࡢ Na-22 ⥺※ࢆ⨨ࡁ 150rpm ࡛㐃⥆ᅇ㌿ࡉࡏ࡚ࠊ᳨ฟჾࡣᅇ㌿୰ᚰ࠿ࡽ
s74mm ࡢ⠊ᅖࢆ 2mm ࢫࢸࢵࣉ࡛ᖹ⾜⛣ືࡋࡓࠋ∦㐨ᡤせ᫬㛫ࡣ⣙ 13 ศ࡛ 24 ᫬㛫࠿ࡅ࡚ 55
 ᚟ࡋࡓࠋᅗ 2(a)࡟ᩥᏐᆺ⥺※ࡢ࢖࣓࣮ࢪࣥࢢࣉ࣮ࣞࢺീࢆ♧ࡍࠋᩥᏐࢧ࢖ࢬࡣ㧗ࡉ 26mm࡛࠶ࡿࠋ䛆⤖ᯝ䛇㻌 ᅗ 2(b)࡟ ᐃ࡛ᚓࡽࢀࡓࢧ࢖ࣀࢢ࣒ࣛࠊ(c)࡟᭱ᑬ᥎ᐃ-ᮇᚅ್᭱኱໬ἲ㸦ML-EM ἲ㸧࡛෌ᵓᡂࡋࡓ⥺※ࡢ 2ḟඖศᕸࢆ♧ࡍࠋ⏬ീ
ࡣ 1 ㎶ 150mm ࡢṇ᪉ᙧࢆ୍㎶ 2mm ࡢࣆࢡࢭࣝ
࡛ศ๭ࡋࡓࠋ㠃⥺※ࡢᙧ≧ࡣࡼࡃ෌⌧ࡋ࡚࠸
ࡿࠋࡲࡓⅬ⥺※࡟ᑐࡋᅗ 2㸸(a)ᩥᏐ⥺※ࡢ࢖࣓࣮ࢪࣥࢢࣉ࣮ࣞࢺീࠊ(b)ࢧ࢖ࣀࢢ࣒ࣛࠊ
್࡚༙඲ᖜ 3mm ௨ୗࡢ㸦c㸧෌ᵓᡂ⏬ീࠊ▮༳ࡣⅬ⥺※ࡢീ఩⨨ศゎ⬟ࢆᚓࡓࠋ
ࡇࡢ᪉ἲ࡛ࡣ㐜࠸㐣⛬࡟ࡼࡿ RI ࡢືែࢆᐇ᫬㛫࡛ほᐹ࡛ࡁࡿࡢ࡛ࠊᶵᲔࢆ㐠㌿ࡋ࡞ࡀࡽᐇ᫬
㛫࣭㠀᥋ゐ࡛⾜࠺ᶵᲔ㒊ရࡢᦶ⪖ヨ㦂࡞࡝ࠊᕤᏛศ㔝࡬ࡢᛂ⏝ࡀᮇᚅࡉࢀࡿࠋ࡞࠾࣏ࢫࢱ࣮
࡛ࡣ⥺※࡜ࡋ࡚ Zn-65 (8MBq)ࡢሷ㓟⁐ᾮࢆ⏝࠸ࡓ ᐃࡢ⤖ᯝࡶྜࢃࡏ࡚ሗ࿌ࡍࡿࠋ
䛆ཧ⪃ᩥ⊩䛇㻌 [1] T. Kambara, A. Yoshida and H. Takeichi, Nucl. Instr. Meth. A 797 (2015) 1.

- 123 -

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-3$5&$115, ࡟࠾ࡅࡿᨺᑕᛶ᰾✀ࡢ㠀◚ቯศᯒཎᏊຊᶵᵓ ࠊ㤳㒔኱  ‫ ⸨ۑ‬ᬸ㍜ ࠊᾏ⪁ཎ ඘ ࠊ㯤 ᫂㍤ ࠊᮌᮧ ᩔ ࠊ୰ᮧペྖ ࠊ℩ᕝ㯞㔛Ꮚ 䛆⥴ゝ䛇 ༶Ⓨ࣐࢞ࣥ⥺ศᯒ(PGA)ࡣࠊ୰ᛶᏊᤕ⋓཯ᛂ࡟ࡼࡗ࡚ᨺฟࡉࢀࡿ࣐࢞ࣥ⥺ࡢ࢚ࢿࣝࢠ
࣮࡟ࡼࡗ࡚᰾✀ᘚูࡍࡿᡭἲ࡛࠶ࡾࠊ୰ᛶᏊඹ㬆ᤕ⋓ศᯒࡣࠊཎᏊ᰾ࡢከࡃࡀ⇕እ୰ᛶᏊ࢚
ࢿࣝࢠ࣮㡿ᇦ࡟ࡶࡘᅛ᭷ࡢඹ㬆࢚ࢿࣝࢠ࣮࡟ࡼࡗ࡚ᘚูࡍࡿᡭἲ࡛࠶ࡿࠋ୰ᛶᏊඹ㬆ᤕ⋓ศᯒ࡛ࡣࠊ㣕⾜᫬㛫ἲ(TOF)࡟ࡼࡗ࡚ࣃࣝࢫ୰ᛶᏊࡢ࢚ࢿࣝࢠ࣮ࢆ ᐃࡍࡿࡇ࡜࡟ࡼࡗ࡚ࠊඹ㬆࢚ࢿࣝࢠ࣮ࢆᚓࡿࠋMLF ࡢ BL04 ࡟タ⨨ࡉࢀ࡚࠸ࡿ୰ᛶᏊ᰾཯ᛂ ᐃ⿦⨨㸦ANNRI㸧࡛ࡣࠊ᳨ฟ㝈⏺࡜ᓧูᛶ⬟ࡢྥୖࢆ┠ᣦࡋࠊୖ㏙ࡢ㸰ࡘࡢศᯒἲࢆ⤌ࡳྜࢃࡏࡓᡭἲࠊࡘࡲࡾ TOF
ࢆ PGA ࡟㐺⏝ࡋࡓศᯒἲ(TOF-PGA)ࡢ◊✲㛤Ⓨࢆ⾜࡞ࡗ࡚ࡁࡓ[1]ࠋ
 TOF-PGA ἲࡣศ㞳ኚ᥮➼࡟࠾ࡅࡿᨺᑕᛶ᰾✀ࡢ㠀◚ቯศᯒ࡜ࡋ࡚ࡢᛂ⏝ࡀᮇᚅࡉࢀࡿࠋศ
㞳ኚ᥮ᢏ⾡࡜ࡣᗫᲠ≀ฎศࡢ኱ᖜ࡞㈇ᢸ㍍ῶࢆ┠ᣦࡋࠊ㧗ࣞ࣋ࣝᨺᑕᛶᗫᲠ≀ࢆ࠸ࡃࡘ࠿ࡢ
ࢢ࣮ࣝࣉ࡟ศ㞳ࡋࠊ㛗ᑑ࿨ࡢࡶࡢࢆ᰾ኚ᥮ࡋ࡚▷ᑑ࿨໬ࡍࡿᢏ⾡࡛࠶ࡿࠋ⩌ศ㞳ࡉࢀࡓࢢࣝ
࣮ࣉࡢ࠺ࡕ Tc࣭ⓑ㔠᪘ඖ⣲ࡣࠊ⟶⌮ࡍ࡭ࡁ Tc-99ࠊPd-107 ࡢ㛗ᑑ࿨ࡢᨺᑕᛶ᰾✀ࢆྵࡴ୍᪉
࡛ࠊ᭷⏝࡞㔠ᒓ㈨※࡜ࡋ࡚෌฼⏝ࡍࡿࡇ࡜ࡶ᳨ウࡉࢀ࡚࠸ࡿࠋ෌฼⏝ࡢࡓࡵ࡟ࡣⓑ㔠᪘ࡢᐃ㔞ࡔࡅ࡛࡞ࡃࠊࡇࢀࡽࡢᨺᑕᛶ᰾✀ࡢᐃ㔞ࡶ㔜せ࡛࠶ࡿࡀࠊPd-107 ࡣ⣧ș᰾✀࡛࠶ࡾࠊTc-99
ࡶṤ࡝ᔂቯȚ⥺ࢆᨺฟࡋ࡞࠸ࡓࡵࠊ◚ቯἲ࡟ࡼࡗ࡚ࡶᐃ㔞ࡍࡿࡇ࡜ࡀᅔ㞴࡛࠶ࡿࠋ ᮏ◊✲࡛ࡣࠊ⩌ศ㞳ᚋࡢ Tc࣭ⓑ㔠᪘ඖ⣲ࡢ㠀◚ቯศᯒࢆ☜❧ࡍࡿ஦ࢆ┠ⓗ࡜ࡋ࡚ࠊANNRI࡟࠾࠸࡚ TOF-PGA ἲ࡟ࡼࡿᨺᑕᛶ᰾✀ศᯒᐇ㦂ࢆ⾜ࡗࡓࠋ䛆ᐇ㦂䛇 ᐇ㦂ࡣ ANNRI ࡢ 21.5m ఩⨨࡟タ⨨ࡉࢀ࡚࠸ࡿࢡࣛࢫࢱ࣮Ge ᳨ฟჾ 2 ྎ࡜ࢥ࢔࢟ࢩࣕ
ࣝ Ge ᳨ฟჾ 7 ྎࢆ⏝࠸࡚ᐇ᪋ࡋࡓࠋヨᩱࡣ㧗ࣞ࣋ࣝᨺᑕᛶᗫᾮ[2]ࢆᶍᨃࡍࡿࡓࡵࠊࡑࢀ࡟
㏆࠸ඖ⣲ẚ࡜࡞ࡿࡼ࠺࡟ㄪᩚࡋࡓࠋTc-99 ࡜ Pd-107 ࡣ Al ࢟ࣕࣉࢭࣝ࡟ᐦᑒࡉࢀࡓࡶࡢ࡟ࣃࣝ
ࢫ୰ᛶᏊࣅ࣮࣒ࢆ↷ᑕࡋࡓࠋࡲࡓࠊ◚ቯศᯒ࡟࠾࠸࡚ጉᐖඖ⣲࡜࡞ࡿ Ag ࢆຍ࠼ࡓヨᩱࡶసᡂࡋࠊAg ࡀ TOF-PGA ᐃ࡟୚࠼ࡿᙳ㡪ࡶㄪ࡭ࡓࠋ ᐃ᫬ࡢࣅ࣮࣒ᙉᗘࡣ⣙ 500kW ࡛࠶ࡾࠊ༢
ඖ⣲ヨᩱ࡟ࡘ࠸࡚ࡣ 30 ศ࠿ࡽ 1 ᫬㛫⛬ᗘࠊᶍᨃヨᩱ➼࡟ࡘ࠸࡚ࡣ 6 ᫬㛫⛬ᗘࡢ ᐃࢆ⾜ࡗࡓࠋ䛆⤖ᯝ䛇༢ඖ⣲ヨᩱࡢ ᐃ࡛ࡣࠊᚑ᮶ἲࡢ PGA ࡛ࡶ TOF ࡛ࡶ᫂░࡞ࣆ࣮ࢡࢆ☜ㄆ࡛ࡁࡓࠋ୍
᪉ࠊ㧗ࣞ࣋ࣝᨺᑕᛶᗫᾮࢆᶍᨃࡋࡓヨᩱ࡛ࡣࠊヨᩱ࡟ྵࡲࢀࡿ」ᩘࡢඖ⣲(᰾✀)࠿ࡽࡢ࣐࢞ࣥ
⥺࡜ඹ㬆ࡢࣆ࣮ࢡࡀ࡝ࡕࡽࡶ㔜࡞ࡾ࠶࠺ࡓࡵࠊከࡃࡢඖ⣲ࡣ PGA ࡛ࡶ TOF ࡛ࡶゎᯒࡀᅔ㞴࡛࠶ࡗࡓࠋࡋ࠿ࡋࠊTOF-PGA ࡛ࡣ TOF ࡜ PGA ࡢ┦㛵ࢆ⏝࠸ࡿ஦ࡀ࡛ࡁࡿࡓࡵࠊᶍᨃヨᩱ࡛࠶ࡗ࡚ࡶಶࠎࡢඖ⣲(᰾✀)࠿ࡽࡢ࣐࢞ࣥ⥺㸦ཬࡧඹ㬆㸧ࡔࡅࢆᚓࡿ஦ࡀ࡛ࡁࡓࠋࡲࡓࠊࢹࢵࢻ
ࢱ࢖࣒➼ࡢ⿵ṇࢆ⾜࠺ࡇ࡜࡟ࡼࡾࠊTc-99 ࡜ Pd-107 ࢆヨᩱࡢෆᐜ≀࡟ࡼࡽࡎṇ☜࡟ᐃ㔞ࡍࡿ஦ࡀ࡛ࡁࡓࠋᮏⓎ⾲࡛ࡣゎᯒࡢ㝿࡟⏝࠸ࡿᨺᑕᛶ᰾✀ࡢ᰾ࢹ࣮ࢱᩚഛࡢᚲせᛶ࡟ࡘ࠸࡚ࡶ㏙࡭ࡿ[3]ࠋ
䛆ㅰ㎡䛇ᮏ◊✲ࡣ⛉◊㈝ JSPS 㸦22750077㸧ࡢຓᡂࢆཷࡅࡓᡂᯝࢆྵࡴࠋ
䛆ཧ⪃ᩥ⊩䛇
1) Y. Toh et al., Anal. Chem. 86, 12030Ѹ12036 (2014)
2) JAEA Review 2008-037ࠕ෌ฎ⌮ࣉࣟࢭࢫ࣭໬Ꮫࣁࣥࢻࣈࢵࢡ➨ 2 ∧ࠖ3) S. Nakamura et al., Nucl. Data Sheets 119,143̽146 (2014)- 124 -

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- 152 -

᜴ᭉ᥿ᣘც


発表者アルファベット順索引(*は登壇者を示す)

Fujita, H.
Fujita, H.
Fujita, N.

藤田啓恵

2B01 , 2B02, P41
P37

Fukuda, D.
Fukuda, M.

福田大輔

P04
1B07, 1B08, 2A03,
P31

Fukuda, T.
Fukumoto, M.
Furukawa, J.

福田智一

P18
3A01

Furuta, E.

古田悦子

—A—
阿部寛信

P18∗ , P19

Akiyama, K.
Aoki, J.

秋山和彦

∗

青木

順

Arai, H.
Asai, M.

新井肇

Abe, H.

Asazuma, S.
Azuma, K.

浅井雅人
浅妻新一郎
東

奎介

藤田博喜
藤田将史
福田光順
福本

学

古川

純

3A01
3A06∗
P07∗
P08∗
2B08
1A05, 1A06
1A05, 1A06
1A11
2A07∗

—G—
—B—
Baba, H.
Bamba, S.

馬場

宏

伴場

滋

∗

2A06
P09∗ , P21

Ganeshraja,
A. S.

A. S.
Ganeshraja

3B03

Goto, S.

後藤真一

1B06, 1B07, 1B11,

Goto, S.
Grund, J.

後藤祥子

P27, P28, P29, P30
P06
1B07

Borschevsky, A. A. Borschevsky 1B08

—C—
Caﬀee, M. W.

M. W. Caﬀee

1B03

Chiba, M.
Chikada, T.

千葉美麗

1A05, 1A06, P17
3A01

近田拓未

J. Grund—H—
Haba, H.

羽場宏光

—D—Düllmann,
Ch. E.

Ch. E.
Düllmann

1B10, 2A02, 2B02,
P27, P28, P29,
1B07, 1B08
Hagiwara, K.
Hagiwara, M.

萩原健太

Hama, K.
Hara, M.

濱

克宏

原

正憲

1B07
1A08∗ , 1A09,
3B07, P38, P44

Hashimoto, K.

橋本和幸

Hatano, Y.

波多野雄治

Hatazawa, J.
Hatsukawa, Y.

畑澤—E—Eberhardt, K.
Ebihara, M.

K. Eberhardt
海老原 充

Eichler, R.
Eigl, R.

R. Eichler
R. Eigl

1B07
3A05

Esaka, F.

江坂文孝

P15

—F—
Fan, Q.
Fujii, K.

Q. Fan藤井健悟

1A01, 1A02
P08, P11∗

Fujimori, K.
Fujisawa, T.

藤森

P09
2B05, 2B08

憲

藤澤照功

2S01, 1A08, 1A09,
1B01, 1B04, 1B06,

萩原雅之

順

初川雄一

Hayakawa, T.
Higaki, S.

早川岳人

Higemoto, W.
Hirose, A.

髭本

亘

廣瀬

農

Hirose, K.
Hiwatashi, M.
Honda, M.

廣瀬健太郎

Hoshino, M.
Hosoda, K.

星野萌生- 153 -

桧垣正吾

樋渡瑞幹
本多真紀
細田 和夫

P30, P31, P32, P43
P02, P08
1B03
P12
3A01
1B05, 2A01, 2A03,
2A04, P33∗ , P34
3A01
2A05
1B05, 2A03∗ , 2A04,
2B01, P33
2A03
1A01, P06
2B03
P36
1B07
P20
3A05, P05
2A07
2A08

Hosoya, S.
Huang, M.

細谷青児
黄

明輝

Kimura, H.

木村寛之

2A03

3B07 , P44

Kino, Y.

木野康志

1A04, 1A05, 1A06,
2B04∗ , P17

岸本武士

1B08

Kishimoto, T.
Kitagawa, A.
Kitatsuji, Y.

P03
3B01
3B06∗

P26
∗

—I—
Ichikawa, S.

市川進一

Ikeda, H.
Ikeda, K.

池田隼人

Ikeda, T.
Imagawa, S.
Inagaki, J.

池田卓海

Inagaki, M.
Ishii, Y.

稲垣

Ishimaru, T.
Ishioka, N. S.
Isogai, E.

石丸

Isogai, K.
Itabashi, Y.

磯貝啓介

Ito, T. U.
Iwahana, Y.
Iwamoto, N.

伊藤Iwamoto, Y.

池田和臣
今川

峻

稲垣純平
誠

石井康雄
隆

石岡典子
磯貝恵美子

∗

北川敦志
北辻章浩

Koarai, K.
小荒井一真
Kobayashi, N. I. 小林奈通子

P32, P35
P04
1B10

Kobayashi, Y.
Kodama, R.
Kohnosu, Y.

小林義男

2B03, P37
P19∗

Koike, Y.

小池裕也

P02, P08, P11,
P13, P24, P40

1A01
1B05, P33
1A05, 1A06

Komatsuda, S.
Komori, Y.

小松田沙也加

2B06, 2B07∗
1B04, 1B06, 1B10∗ ,2A02, P27, P28,

児玉理惠
鴻巣祐也

小森有希子

P03, P21
1A04

Kondo, A.

近藤

Kondo, N.
Koriyama, S.
Kratz, J. V.

近藤成美

岩本信之

2B03
P08
1B05

岩元洋介

1B03

Kubo, K.
Kubuki, S.

久保謙哉

Kudo, A.
Kudo, H.

工藤

板橋康弘
孝

岩鼻雄基

—K—

茜

郡山慎一

J. V. Kratz
久冨木志郎
輝

工藤久昭

Kabuki, S.

株木重人

2A03

Kaji, D.

加治大哉

2S01∗ , 1B06∗ ,1B10, 2A02
3A05

Kudou, Y.
Kumamoto, Y.
Kume, T.

工藤祐生

1B07
P43∗

Kurihara, Y.
Kurimoto, Y.

栗原雄一

P15
P32, P35∗
1A01

Kurosawa, T.
Kusama, K.

黒沢

Kakuta, S.

角田紳一郎

Kamada, H.
Kambara, T.

鎌田裕生

Kanazawa, K.
Kanda, A.
Kanda, J.

金澤和仁

Kaneko, K.
Kaneko, M.

金子健司

Kaneshiki, T.
Kaneya, Y.
Kano, Y.

金敷利隆

神原

正

神田晃充
神田穣太
金子政志

熊本雄一郎
久米冬馬
栗本康司
崇

草間経二

Maeda, E.
Magara, M.
Makii, H.

前田英太

加納康大

Kasamatsu, Y.

笠松良崇

∗

3S01 , 1B02, 1B07,
1B09, 1B10

Maruta, F.
Matsubara, R.

丸田文之

Kato, Y.
Kawabata, M.
Kawamura, N.

加藤結花

P10
1B05, 2A04∗ , P33
2B03, P37

Matsue, T.
Matsumoto, M.
Matsumura, M.

松江登久

1B01 , 1B10, P29,
P41

Matsunaka, T.
Matsuo, M.

松中哲也

3B07, P44
1A04

Matsuta, K.
Matsuura, H.

松多健策

Kikunaga, H.
Kimura, A.
Kimura, E.

川端方子
河村成肇
菊永英寿
木村

敦

木村栄一

∗

3B01, 3B02
P09
P23

P29, P31, P32
P20
1B09∗
1A04
1B07, 1B08
3B01, 2B03
2B01, P41
P22∗
1B11, P27, P28,
P29, P30
1B09
P22
P08
1A01, P11, P13
P39
1A03
2A07

—M—

P03
3S02∗ , 3B04∗
P42
1B07∗ , 1B08
P38

金谷佑亮

1A05∗ , 1A06, P17
P36

2A05
3B08

- 154 -

間柄正明
牧井宏之
松原梨沙子
松本幹雄
松村万寿美
松尾基之
松浦治明

2A01
P15, P16
1B07, 1B08
P23
P20
P09
1B04, 2A02
P05, P26
P05, P26∗
P01
2B08
P04

松崎浩之

1A08, 1A09, P05,

Nakagawa, M.

中川真結

P38∗

三原基嗣

Nakajima, T.
Nakajima, T.

中島丈博

Mihara, M.

P22
2B08, 3B01

1A04
1A09

Minato, F.
Minowa, H.
Mitachi, K.

湊

1B05
P10∗
P19

Nakamura, S.
中村詔司
Nakamura, T.
中村利廣
Nakanishi, T. M. 中西友子

1B02
1B07, 1B08, 1B10,

Nakashima, S.
Nanbu, A.

中島

P29, P31∗
1A01∗ , 1A02
2B03

Nemoto, K.
Nihei, N.
Niizato, T.

根本圭介

2B03, P37
P15, P16∗

Ninomiya, K.

二宮和彦

Matsuzaki, H.

太志

箕輪はるか
三田地勝昭

Mitsugashira, T. 三頭聰明
Mitsukai, A.
水飼秋菜
Miura, H.
Miura, T.

三浦輝

Miyake, Y.
Miyamoto, Y.

三宅康博

Miyashita, S.
Miyashita, Y.
Miyata, Y.

宮下

三浦太一
宮本ユタカ
直

宮下由香
宮田佳樹

Miyauchi, S.
Miyazaki, J.

宮内翔哉

Miyoshi, H.
Mizumoto, T.
Mizunuma, T.

三好弘一

Mori, K.
Moriguchi, Y.
Morimoto, K.

森

Morimoto, T.
Morita, K.

森本隆夫

Morito, Y.
Motoishi, S.
Motoyama, R.

森戸祐幸

Murakami, K.
Murakami, M.

村上拳冬

Muramatsu, H.
Muranoi, T.

1B07, 3B04
2B01
P12

宮

水本哲也
水沼丈史
一幸

森口祐一
森本幸司

本山李沙

P37
1B03
P24∗

西中一朗

P06
2A03
P40

Nishio, K.
Nishiyama, J.
Nishizawa, K.

西尾勝久

P06
1A08, 1A09
2S01, 1B06, 1B10

Nitta, W.
Nogami, M.

新田

Nohara, S.
Nojima, T.
Nomura, K.

野原精一
野村貴美

P04
3A06
2A08∗ , 3B03∗ , P40

Nomura, M.

野村雅夫

P42

P34
P29, P30

村松久和

∗

友

3S03∗ , 1A07, 1A11,
1B03, 2B03, P07,

Nishinaka, I.
Nishino, S.

村上昌史
村野井

新里忠史

1A03
1A03∗
P19

P41
3B01

2A08
2A04
1B10, P29, P30∗

本石章司

二瓶直登

3B04
1B03∗

西泉邦彦

P09
2S01

森田浩介

覚

南部明弘

3B07, P44
P02, P11, P13
P36

Nishiizumi, K.
Nishimagi, S.

∗

淳

中島映至

西間木史織
西野茂人
西山純平
西澤邦秀
済

野上雅伸
野島健大

2A01∗ , P34
P22
1B07
1A05, 1A06∗ , P17
P06
P03
P42

—O—
Obuchi, A.

大渕敦司

P08, P11

Ochi, K.
Oda, H.
Ogata, Y.

越智康太郎

P02
3B08∗ , P25∗
P10

Ohara, T.
Ohkubo, Y.

大原利眞

P04
1A08, P22
3B05

Ohno, T.
Ohta, Y.
Ohte, N.

大野

P20
1A04∗

—N—
∗

小田寛貴
緒方良至
大久保嘉高

1A09
2B06, 2B07

Nagahashi, T.
Nagai, H.
Nagai, M.

長橋孝将

Nagai, Y.

永井泰樹

1B05, 2A03, 2A04,
P33

Ohtsuki, T.
Oka, T.

大槻

Nagakawa, Y.
Nagame, Y.
Nagao, S.

永川栄泰

1A08, 1A09
1B07, 1B08, P31
P12

Okada, Y.
Okazawa, A.
Okumura, S.

岡田往子
奥村真吾

P04
P40
P02∗

Nagaoka, M.
Nagase, M.

永岡美佳

3A06
1B09

Omtvedt, J. P.
Onda, Y.

J. P. Omtvedt
恩田裕一

1B10
1A07

Nagatomo, T.
Naguwa, R.

長友傑

Ono, H.

小野洋伸

3A06

名桑

良

3B01
1B07

永井尚生
永井満家

永目諭一郎
長尾誠也
永瀬将浩

- 155 -

剛

太田裕二
大手信人
岡

勤

岡澤

壽崇
厚

3A05
P21
1A03
1B01, 1B02
1A05, 1A06, P17∗

Ono, T.

大野峻史

3A03

Schädel, M.

M. Schädel

1B07, 1B08

Ooe, K.

大江一弘

1B07, 1B08, 1B10,
1B11, P27, P28∗ ,Segawa, M.
Seino, U.

瀬川麻里子

P44
P23∗

P29, P30
P34
1B07, 1B08

Sekimoto, S.
Sekine, T.
Sera, K.

関本

俊

関根

勉

1A05, 1A06, P17
3A06

Seto, H.
Shibata, M.

瀬戸博文

1B11
3B06
1B09

Shibata, S.
Shibazaki, M.
Shigekawa, Y.

柴田誠一

Ooe, S.
Osa, A.

大江崇太

Osaka, K.
Osawa, T.

小坂

Oshimi, Y.
Otobe, H.
Ouchi, K.

押見吉成

Ouchi, K.
Oura, Y.

大内和希
大浦泰嗣

3B06
1A08, 1A09∗

Oya, Y.

大矢恭久

3A01

長

明彦
健

大澤崇人
音部治幹
大内昴輝

—P—
Pershina, V.

V. Pershina

1B07

J. Runke

世良耕一郎
柴田理尋

1B07

1A08, 1B03
1A05, 1A06, P17
P06
P09
1B07

重河優大

1B03, 1B04, 2A02
P09
1B02, 1B03, 1B08,

Shigihara, T.

鴫原

1B09, 1B10
1A04

Shikamori, Y.
Shima, N.
Shima, T.

鹿籠康行

Shimizu, H.
Shimizu, Y.

清水弘通

柴崎昌彦

隆

島

長義

嶋

達志

清水良央

Shimomura, K. 下村浩一郎
Shimosegawa, E. 下瀬川恵久
Shin, Y.
新 裕喜

—R—Runke, J.

清野詩子

Shinoda, H.
Shinohara, A.

篠田

壽

篠原

厚

—S—

3A05
3A02∗
1B03
2B08∗
1A05, 1A06, P17
2B03
2A05
P34
1A05, 1A06, P17
1A07, 1A11, 1B02,
1B03, 1B09, 2A05,
2B03, P07, P32,
P35, P37

Saeki, H.

佐伯秀也

1B05, 2A04, P33

Saito, T.
Sakaguchi, A.

齊藤

敬

坂口

綾

P24
1A01, 1B10, 3A05∗ ,P05, P12

Shinohara, H.
Shiobara, R.
Shirai, K.

篠原宏文

3A07
P39

Shirai, N.
Shirasaki, K.

白井直樹

1B07, 1B08
3A01
1A08, 1A09

Shozugawa, K.
Sigekawa, Y.
Singu, K.

小豆川勝見

1A10, P05, P26
1A05, 1A06, P17

Soemori, A.
Sonoda, S.

添盛晃久
園田伸也

P01
2A03

Steinegger, P.
Stora, T.
Strasser, P.

P. Steinegger
T. Stora
P. Strasser

1B07
1B08
2B03

∗

塩原良建
白井香里

P21
P13∗
1B07, 1B11∗

Sakai, H.
Sakai, Y.

酒井浩章

Sakama, M.
Sakurada, S.
Sakurai, N.

阪間

Sasa, K.
Sasaki, K.

笹Sato, D.

佐藤大輔

Sato, T. K.

佐藤哲也

1B07, 1B08, 1B10,
P29∗
2S03∗ , 1B07,

Sueki, K.

末木啓介

Sato, M.

佐藤美穂

1B08∗ , 2A03, P31
3B02

1A10, 3A05, P05,
P26

Sato, N.
Sato, S.
Sato, S.

佐藤

1B10, 2A02∗
3B01
P33

Sugita, R.
Sugo, Y.
Suzuki, A.

杉田亮平

P36∗
1B05, P33
1A07∗∗

2B05, 2B06 , 2B07,
2B08, 3B01, P38

Suzuki, D.
Suzuki, K.

鈴木大輔

3B01
1A10∗ , P05

Suzuki, M.
Suzuki, S.

鈴木聖人

Sato, W.
Sato, Y.
Satou, Y.

酒井陽一
稔

桜田翔大
櫻井

昇
公和

佐々木啓一

望

佐藤眞二
佐藤俊一
佐藤

渉

佐藤祐貴子
佐藤志彦

- 156 -

白崎謙次
重河優大
新宮一駿

須郷由美
鈴木杏菜
鈴木究真
鈴木茂世

1A08, 1A09
3B05
P01
1B07
1B07

P15
P04
3B01∗
P40∗

Suzuki, T.
Suzuki, T.
Suzuki, T.

鈴木敏彦

1A05, 1A06, P17
∗

鈴木貴博

3A03
P42

鈴木達也

—T—
Tabei, K.
Tachibana, Y.

田部井

Tada, J.
Tagami, K.
Taguchi, A.

多田順一郎

Takada, A.
Takahashi, A.

高田淳史
高橋

温

Takahashi, A.
Takahashi, J.
Takahashi, K.

高橋晃

Takahashi, M.
Takahashi, N.

高橋賢臣

Takahashi, T.
Takahashi, Y.
Takaku, Y.

高橋Takamiya, K.
Takeda, S.
Takenaka, S.

高宮幸一

Takeuchi, N.
Takeyama, M.

竹内宣博

Tamari, T.
Tanaka, K.
Tanaka, K.

玉利俊哉

Tanaka, T.
Tanigawa, S.

田中泰貴

Taniguchi, T.
Tanimori, T.
Tanoi, K.

谷口拓海

Terai, T.
Terashima, C.

寺井隆幸

ThörlerPospiech, P.

立花

健
優

田上恵子
田口

明

高橋純子
高橋和也
高橋成人
努

高橋嘉夫
高久雄一
武田晋作
竹中聡汰
武山美麗
田中万也
田中康介

Trautmann, N.

N. Trautmann

1B07

Tsukada, K.

塚田和明

1B05∗ , 1B07, 1B08,
2A03, P31, P33

Tsukamoto, T.
Tsuruta, H.

塚本敏夫

P25
1A08, 1A09

鶴田治雄

—U—

3A04
P42∗
1A03
3A04∗
3A01

Uchida, S.
Uchiyama, T.
Uemura, Y.

内田滋夫
植村有希

3A04
P04
3A01∗

2A03
1A05, 1A06, P17

Uesugi, M.

上杉正樹

3A07, P14

内山孝文

—W—

3B05
1A07
1B04, 2A02

Wakabayashi, Y. 若林泰生

P24
1B03, 2A05

Wakitani, Y.
Wang, J.

脇谷雄一郎
王

軍虎

P05, P26
1A01, 1A02∗
3A05

Wang, XS.
Washiyama, K.
Watanabe, K.

王

暁水

1B01, 1B02, 2A06
1B08
2B05∗

Watanabe, M.
Watanabe, S.

渡邉雅之

Watanabe, S.
Watanabe, S.
Watanabe, Y.

渡辺晋一郎

2A04
1B06
3A02
1A02
2B02∗

鷲山幸信
渡邉慶子
渡辺
渡辺

智
峻

渡辺裕夫

1B06
1B04
3B03
P21∗
2A01, P34
1B04, 1B10, 2A02
3B04
1B05, P33
2A05
P04
2A07

—Y—

1B10
3B01

Yakushev, A.
Yamada, N.

A. Yakushev
山田記大

2S02∗ , 1B07
P34∗

2A01
2A03
P36

Yamada, R.
Yamada, T.
Yamada, T.

山田亮平

P27∗ , P28
1B04
P25

2A08
2A08

Yamada, Y.
Yamagata, T.

山田康洋

P. ThörlerPospiech

1B07

山㟁崇之

Toh, Y.

藤3B07, P44∗

Yamagishi, T.
Yamaguchi, Y.
Yamaki, S.

Tokizawa, T.
Tomita, J.

時澤孝之

P18
P12∗

Yamamichi, M.
Yamamori, K.

山道美和子

Tomita, R.
Tomitsuka, T.
Toyoda, M.

富田涼平

Yamamoto, M.
Yamamoto, S.
Yamamura, T.

山本政儀

豊田岐聡

P05∗
1B07
P37

豊岡慎介

∗

P03
1B07, 1B08, 1B10,

Yamasaki, S.
Yamauchi, S.

山﨑信哉

2A02, 2A03, P29,
P31, P32∗ , P35

Yamazaki, K.

山﨑興樹

Toyooka, S.
Toyoshima, A.

谷川祥太郎
谷森

達

田野井慶太朗
寺島千晶

暢輔

富田純平
富塚知博

豊嶋厚史

- 157 -

山田祟裕
山田哲也
山形武靖
山口喜朗
山木さやか
山守航平
山本

駿

山村朝雄
山内

繁

3B01, 3B02∗
1A08, P22
P39
1A07
1B06, 1B10
P21
P14∗
3S04∗ , P12
P01∗
3B05∗
3A05
P39∗
3A03, P23

Yanaga, M.

矢永誠人

P06∗

Yano, S.

矢納慎也

1B04∗ , 1B06, 1B10,
2A02, P32

Yashima, H.
Yasuda, K.
Yasuda, Y.

八島

1B03
P15∗ , P16
1B02∗ , 1B09

Yokoyama, A.

横山明彦

2A01, 3A07, P14,
P34

Yoshida, A.
Yoshida, G.
Yoshikawa, H.

吉田

敦

吉田

剛

P43
2B03∗ , P37∗
P18

Yoshimura, T.

吉村

崇

1A11,
P35

Yuasa, Y.
Yunoki, A.

湯浅由美

P04
2A08

浩

安田健一郎
安田勇輝

吉川英樹

柚木

彰

P07,

P32,

—Z—
Zang, Z.

張子見

1A07, 1A11∗- 158 -

፳Ⴈౕ஭ᮨᯮౕଢ᷽೑ଟ૶ଓାଲଋଚଣῦ
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