㻌
㻌◊✲Ⓨ⾲せ᪨㻌㻌䠕᭶䠍䠎᪥䠄㔠䠅㻌㻌
2A01䡚2A13㻌 A ఍ሙ㻌
2B01䡚2B10㻌 B ఍ሙ㻌
㻌

2A01

䝷䝗䞁ፉ᰾䛾䃐⥺ ᐃ䛻䜘䜛䚸㜵ㆤ᭹ᮦᩱ䛾୙⧊ᕸ䛻㛵䛩䜛ᖏ㟁㜵Ṇᛶ⬟䛾ホ౯㻌㻔ឡ▱་኱㻝䚸ி኱⅔㻞䚸୕஭䝕䝳䝫䞁 㻟䚸䝯䝕䜱䝔䝑䜽䝆䝱䝟䞁 㻠㻕䕿ᕷཎ༓༤ 㻝㻌୕⃝Ẏ 㻞䚸బ⸨㈼἞ 㻟䚸୰⏣୍அ 㻟䚸㟷ᒣṇ㈗ 㻟䚸ᑠすṊᅄ 㻠㻌䛆䛿䛨䜑䛻䛇㻌 ⚟ᓥཎⓎ஦ᨾ཰᮰సᴗ䛿䛨䜑䚸௒ᚋᩘ༑ᖺ௨ୖ䛻䜟䛯䛳䛶ḟ䚻䛻ゼ䜜䜛ᗫ⅔సᴗ䛺䛹䛻䛿ከ㔞䛾㜵ㆤ᭹䜢ᚲせ䛸䛩䜛䚹㜵ㆤ᭹䜈௜╔䛧䛯ᨺᑕᛶ≀㉁䛿䚸సᴗ⪅䛾⿕⇿䛾ཎᅉ䛸䛺䜛䜀䛛䜚䛷䛺䛟䚸౑⏝῭䜏㜵ㆤ᭹䛾ᗫᲠ䛻䜒ᅔ㞴䛺ၥ㢟䜢⏕䛨䜛䚹䛭䛣䛷䚸㜵ㆤ᭹䛜ᖏ㟁䛩䜛䛣䛸䛻䜘䜛ᨺᑕᛶ≀㉁䛾௜╔䜢ᴟຊῶ䜙䛩ᚲせ䛜䛒䜛䛸⪃䛘䚸ᖏ㟁ᛶ䛾ప䛔㜵ㆤ᭹ᮦᩱ䛾㛤Ⓨ䜢⾜䛳䛶䛔䜛䚹୕஭䝕䝳䝫䞁䝫䝸䜿䝭䜹䝹㻔ᰴ㻕䛾㛤Ⓨ䛧䛯 㻱㼚㼠㼕㼞㼍㻭㻿 䝣䜱䝹䝮䛿䛝䜟䜑䛶ඃ䜜䛯ᖏ㟁㜵Ṇᛶ⬟䜢ᣢ䛴䚹䜎䛯䚸䝣䜱䝹䝮䛷䛒䜛䛯䜑䝎䝇䝖䜔䜶䜰䝻䝌䝹≧䛾ᨺᑕᛶ≀㉁䛾ᾐ㏱䜢チ䛥䛺䛔䛻䜒䛛䛛䜟䜙䛪䚸㏱‵ᛶ䛜㧗䛟సᴗ୰䛾Ⓨờ䜢ᢚ䛘䜛䛣䛸䜒䛷䛝䜛䚹䛣䜜䜢୙⧊ᕸ䛷⿬ᡴ䛱䛩䜜䜀ᨺᑕ⥺సᴗ䛻㐺䛧䛯㜵ㆤ᭹ᮦᩱ䛜䛷䛝䜛䛸ᮇᚅ䛥䜜䜛䚹㻌୙⧊ᕸ䜔㧗ศᏊ䝣䜱䝹䝮䛺䛹䛾ᖏ㟁㜵Ṇᛶ⬟䛿䚸⾲㠃᢬ᢠ⋡䜔ᖏ㟁ῶ⾶䛺䛹䛻䜘䜚ホ౯䛥䜜䛶䛝䛯䛜䚸䛤䛟ᚤ㔞䛾ᨺᑕᛶ≀㉁䛾௜╔䛻ᑐ䛩䜛ᖏ㟁⌧㇟䛿䛣䛾᪉ἲ䛷䛿ホ౯䛜㞴䛧䛔䚹௒ᅇ䚸✵Ẽ୰䛾䝷䝗䞁ፉ᰾䛾௜╔䜢䃐⥺᳨ฟჾ䛷ᐃ䛩䜛䛣䛸䛻䜘䛳䛶ホ౯䛩䜛᪉ἲ䜢☜❧䛧䚸㻱㼚㼠㼕㼞㼍㻭㻿 䛸୙⧊ᕸ䜢㈞䜚ྜ䜟䛫䛯ᮦᩱ䜢ྵ䜑䛯ᩘ✀㢮䛾㜵ㆤ᭹ᮦᩱ䛻䛴䛔䛶ᖏ㟁㜵Ṇᛶ⬟䛾ホ౯䜢⾜䛔䚸㻱㼚㼠㼕㼞㼍㻭㻿 䜢౑䛳䛯ᮦᩱ䛜㜵ㆤ᭹䛻ᮇᚅ䛥䜜䜛ᛶ⬟䜢‶㊊䛩䜛䛣䛸䛜ศ䛛䛳䛯䚹㻌䛆ᐇ㦂䛇ி㒔኱Ꮫ⮫⏺ᐇ㦂⿦⨨䛾⅔ᐊ䛿 㻞㼙 ⛬ᗘ䛾䝁䞁䜽䝸䞊䝖䛛䜙䛺䜚䚸✵ㄪ䜢೵Ṇ䛧䛶䛔䜛㐌ᮎ䛺䛹䛾᫬㛫ᖏ䛻䛿䚸䝁䞁䜽䝸䞊䝖䛛䜙౵ฟ䛩䜛ᨺᑕᛶ䝷䝗䞁ፉ᰾䛜㇏ᐩ䛻✵Ẽ୰䛻ᨺฟ䛥䜜䜛䚹䛣䛾㞺ᅖẼ୰䛻䠍䡚㻞 㐌㛫ヨᩱ䜢ᨺ⨨䛩䜜䜀䚸ヨᩱ䛻䜘䛳䛶␗䛺䜛ᖏ㟁ᛶ䛻ᛂ䛨䛯㔞䛾䝷䝗䞁ፉ᰾䛜௜╔䛩䜛䚹䛣䜜䜢䃐⥺䝃䞊䝧䜱䝯䞊䝍䛷 ᐃ䛩䜜䜀䛝䜟䜑䛶㧗ឤᗘ䛺ᖏ㟁ᛶ䛾ホ౯䛜䛷䛝䜛䚹㻌ᐃ䛻䛿 㻟㻙㻠 ྎ䛾䃐⥺䝃䞊䝧䜱䝯䞊䝍䜢౑⏝䛩䜛䛯䜑䚸䛭䜜䛮䜜䛾ឤᗘ䛾㐪䛔䜢ኳ↛䜴䝷䞁䛾⾲㠃⥺※䜢฼⏝䛧䛶ᰯṇ䛧䛯䚹䛣䛾䃐⥺※䛛䜙䛿䃒⥺䜒ᨺฟ䛥䜜䜛䛜䚸䝃䞊䝧䜱䝯䞊䝍䛾 ᐃ㠃䛻䜰䝹䝭⟩䛾㐽ⶸ䜢௜䛡䛯䛸䛝䛸௜䛡䛺䛔䛸䛝䛾㛫䛻᭷ព䛺 ᐃ್䛾ᕪ䛜䛺䛔䛣䛸䛛䜙䚸䃒⥺䛾ΰධ䛻䜘䜛䃐⥺䝃䞊䝧䜱䝯䞊䝍䛾 ᐃ䜶䝷䞊䛜䛺䛔䛣䛸䜢☜䛛䜑䛯䚹㻌㻌 䜎䛯䚸䝷䝗䞁ፉ᰾䛾௜╔䛜ᖏ㟁䛻䜘䜛䛣䛸䛿䚸䐟㻌 ヨᩱ䜢ᗋ㠃䛻Ỉᖹ⨨䛝䛧䛯䛸䛝䛸䚸ᆶ┤䛻䛴䜛䛧䛯䛸䛝䛸 䃐 ⥺ィᩘ䛻᭷ព䛺ᕪ䛜Ꮡᅾ䛧䛺䛔䛣䛸䚸䐠㻌 ヨᩱ⾲㠃䛻䝇䝔䞁䝺䝇㔠⥙䛷స䛳䛯䜾䝸䝑䝗䜢⨨䛝䚸䛣䜜䛾᭷↓䛻䜘䜚䝷䝗䞁ፉ᰾䛾௜╔㔞䛜᭷ព䛻ኚ໬䛩䜛䛣䛸䚸䛾 㻞 䛴䛾⤖ᯝ䛛䜙☜ㄆ䛧䛯䚹㻌䝷䝗䞁ፉ᰾䜢௜╔䛥䛫䛯ヨᩱ䛿䚸䃐⥺䝃䞊䝧䜱䝯䞊䝍䛾ởᰁ䜢㜵Ṇ䛩䜛䛯䜑䚸ᕷ㈍䛾㣗ရ⏝䝷䝑䝥䛷そ䛔 ᐃ䜢⾜䛳䛯䚹䛣䛾䝷䝑䝥䛻䜘䜛ῶ⾶䛿ኳ↛䜴䝷䞁䛾⥺※䜢 ᐃ䛧䛯ሙྜ 㻢㻜㻑䛻㐩䛩䜛䚹䜎䛯䚸᪂㩭䛺䜰䝹䝭⟩䛾ୖ䛷䛾䃐⥺ ᐃ䜢⾜䛔䚸ྛ䃐⥺䝃䞊䝧䜱䝯䞊䝍䛾䝞䝑䜽䜾䝷䞁䝗ィᩘ䛸䛧䛯䚹㻌䛭䜜䛮䜜䛾ヨᩱ䛻䛴䛔䛶 㻝㻜 ศ㛫䛾ィᩘ䜢 ᐃ䛧䛯䛜䚸䝷䝗䞁ፉ᰾䛿」㞧䛺᫬㛫ᣲື䜢䛩䜛䛯䜑䃐ィᩘ䛾⤯ᑐ್䛻䜘䜛ホ౯䛿⾜䜟䛪䚸ヨᩱྠኈ䛾ẚ㍑䛻␃䜑䛯䚹㻌㻌 䛣䜜䜎䛷 㻣 ᅇ䛻䜟䛯䛳䛶 㻱㼚㼠㼕㼞㼍㻭㼟 䜢ྵ䜐 㻝㻜 ✀㢮⛬ᗘ䛾㜵ㆤ᭹ᮦᩱ䛾ᖏ㟁ᛶ䜢䛣䛾᪉ἲ䛷ホ౯䛧䛶䛝䛯䚹ᚓ䜙䜜䛯⤖ᯝ䛿䚸䐟㻌 㻱㼚㼠㼕㼞㼍㻭㼟 䛿䛩䜉䛶䛾ヨᩱ䛾୰䛷᭱䜒ᖏ㟁ᛶ䛜ప䛔䚹䐠㻌 䛧䛛䛧㜵ㆤ᭹ᮦᩱ䛻䛩䜛䛯䜑୍⯡ⓗ䛺୙⧊ᕸ䛷⿬ᡴ䛱䛩䜛䛸ᖏ㟁ᛶ䛜ᝏ໬䛧䚸ᖏ㟁䜢⪃៖䛧䛺䛔㜵ㆤ᭹ᮦᩱ䛸ྠ⛬ᗘ௨ୖ䛻䛺䜛䚹䐡㻌 䛭䛾㝿䚸㻱㼚㼠㼕㼞㼍㻭㼟 ഃ䛾ᖏ㟁䛜୙⧊ᕸഃ䜘䜚 㻞 ಸ⛬ᗘ㧗䛔䚹䐢㻌 䜎䛯䚸㻱㼚㼠㼕㼞㼍㻭㼟 䛾ཌ䜏䛜ቑ䛫䜀ᖏ㟁㔞䛜኱ᖜ䛻ῶᑡ䛩䜛䚹㻌㻌 䛣䜜䜙䜢㋃䜎䛘䚸㻱㼚㼠㼕㼞㼍㻭㼟 䛾ཌ䜏䛾᭱㐺໬䚸䛚䜘䜃᭱䜒ᖏ㟁㔞䜢ᑡ䛺䛟䛩䜛䛣䛸䛾䛷䛝䜛⿬ᡴ䛱⏝୙⧊ᕸ䛾Ỵᐃ䜢⾜䛖䛣䛸䛻䜘䜚䚸⌮᝿ⓗ䛺㜵ㆤ᭹ᮦᩱ䜢㏿䜔䛛䛻㛤Ⓨ䛧䛶௒ᚋண᝿䛥䜜䜛ᨺᑕᛶ≀㉁䛻㛵䜟䜛సᴗ䛻㈉⊩䛧䛯䛔䛸⪃䛘䜛䚹㻌
Determination of antistatic properties of non-woven fabrics of protective-cloths !"# $%&'&(&)*# +-ray
Measurementfrom radioactive Radondaughtersmr
ICHIHARA, C., MISAWA T., SATO, K., NAKATA, K., AOYAMA, M., KONISHI, T.

- 59 -

2A02᰾ศ⿣⏕ᡂᕼ࢞ࢫࡢྠ఩యẚ ᐃ࡟ࡼࡿᮍ⮫⏺ᗘ┘ど᪉ἲࡢ᳨ウ!⇞ᩱࢹࣈࣜ࠿ࡽࡢᨺᑕᛶᕼ࢞ࢫࡢᤕ㞟ἲࢆ୰ᚰ࡟!
ࢼ࢖ࢫ  ‫⏣⮻ۑ‬㔜࿴ࠊෆ⸨ದᏕ

䛆䛿䛨䜑䛻䛇㻌 㻌⚟ᓥ➨୍ཎⓎ(1F)ࡢᗫ⅔సᴗࡢ㝿࡞࡝ࠊ⇞ᩱࢹࣈࣜࡢ෌⮫⏺ࢆ㜵ࡄࡓࡵ࡟ᮍ⮫⏺ᗘ(⮫⏺ࡲ࡛ࡢవ⿱ᗘ)ࡢ┘ど᪉ἲࡢ㛤Ⓨࡀồࡵࡽࢀ࡚࠸ࡿࠋᚑ᮶ࡣ୰ᛶᏊ᮰ࢆ┘どࡋ࡚࠸ࡓࡀࠊ⅔ᚰ⏤᮶ࡢ୰ᛶᏊ ᐃࡣᅔ㞴࡛࠶ࡿࠋ᰾ศ⿣⏕ᡂ(FP)ᕼ࢞ࢫࡢྠ఩యẚࢆ ᐃࡋ࡚ᮍ⮫⏺ᗘࢆ┘どࡍࡿ᪉ἲࡣࠊ୰ᛶᏊἲ࡟௦ࢃࡿ᭷ຠ࡞ᡭἲ࡛࠶ࡿ[1]ࠋ135Xe ⃰ᗘࢆ☜ㄆࡋ࡚⮫⏺ࡢ඙ೃࢆ┘どࡋ࡚࠸ࡿ࡜ࡢ᝟ሗࡀ࠶ࡿࡀࠊࡇࢀࡣฟຊࢆ┘どࡋ࡚࠸ࡿ࡟㐣ࡂ࡞࠸ࠋᮏⓎ⾲࡛ࡣࠊ⇞ᩱࢹࣈࣜ㡿ᇦ࡛⏕ᡂࡍࡿ FP ᕼ࢞ࢫࡢᤕ㞟ἲࢆ୰ᚰ࡟ᮏἲࢆ 1F ࡟㐺⏝ࡋࡓ㝿ࡢㄢ㢟ࢆ᳨ウࡋࡓࠋ䛆┘ど᪉ἲ䛾ཎ⌮䛇౛࠼ࡤࠊ235U ࡢ⇕୰ᛶᏊㄏᑟ᰾ศ⿣࡜ 244Cm ࡢ⮬Ⓨ᰾ศ⿣࡛⏕ࡌࡿ 135Xe ࡜ 88Kr ࡢ⣼✚᰾ศ⿣཰⋡ࡢẚ Y(Xe)/Y(Kr)࡟ὀ┠ࡍࡿ࡜ࠊ235U ࡛ 1.86 ࡟ᑐࡋ 244Cm ࡛ࡣ 17.6 ࡜࡞ࡾࠊ୍᱆㏆ࡃ␗࡞ࡿ[2]ࠋ୰ᛶᏊᐇຠቑಸ⋡(keff)࡜᰾ศ⿣᫬࡟࠾ࡅࡿ Xe ࡜ Kr ᰾✀ࡢ⏕ᡂ㔞ẚ R0(Xe/Kr)࡟ࡣࠊ
(1- keff)/keff = {YU(Xe)!R0(Xe/Kr)"YU(Kr)}/{ YCm(Kr)"R0(Xe/Kr)!YCm(Xe)}ࡢ㛵ಀࡀ࠶ࡿࠋR0(Xe/Kr)ࡣ#⥺ࢫ࣌ࢡࢺࣝࢆ ᐃࡋ࡚ồࡵࡿࡀࠊ⅔ෆ࡛ࡢᕼ࢞ࢫࡢⓎ⏕࠿ࡽ⅔
እ࡛ࡢ ᐃࡲ࡛ࡢ᫬㛫㐜ࢀ$ࢆู㏵ồࡵࠊࡇࢀ࡛ ᐃ್ࢆ⿵ṇࡍࡿᚲせࡀ࠶ࡿࠋ䛆᳨ウ⤖ᯝ䛸⪃ᐹ䛇㻌 㻌Ẽయヨᩱࡢ᥇ྲྀ࡟㝿ࡋ࡚ࡣࠊFP ᕼ࢞ࢫࡢࡳࢆᤕ㞟ࡍࡿࡓࡵࠊ
ཎᏊ⅔᱁⣡ᐜჾ(PCV)࡟ N2 ࢞ࢫὀධ㔞ࢆㄪ⠇ࡋࠊ✵Ẽ୰ࡢᏳᐃᕼ
࢞ࢫࡀΰධࡋ࡞࠸ࡼ࠺࡟ᕤኵࡍ
ࡿࠋ㎿㏿࡞ヨᩱ᥇ྲྀࡢࡓࡵࠊ᪤タࡢ PCV ࢞ࢫ⟶⌮ࢩࢫࢸ࣒ࡀ฼⏝࡛ࡁࡿ࠿ࠊᑓ⏝ࡢẼయヨᩱᑟධࣛFig.1 Pretreatment and collection of FP rare gas
࢖ࣥࡀᚲせ࠿ㄪᰝࡍࡿࠋࡲࡓࠊ༢
⣧࡛ࢥࣥࣃࢡࢺ࡞࢜ࣥࣛ࢖ࣥศ
ᯒࢆᛕ㢌࡟ࠊࡑࢀࡒࢀࡢ┠ⓗ࡟ᛂࡌࡓࣇ࢕ࣝࢱ࣮ࡢ྾⬺╔≉ᛶࢆㄪ࡭ࡿ(Fig.1 ཧ↷)ࠋຠᯝⓗ࡞ᕼ࢞ࢫࡢ྾╔/⬺╔ࡢࡓࡵ࡟ࡣࠊᚲせ࡟ᛂࡌ෭༷/ຍ⇕᧯సࢆຍ࠼ࡿࠋᑡ࡞ࡃ࡜ࡶ༙ῶᮇ 2.84
h ࡢ 88Kr ࡀ᳨ฟ࡛ࡁࡿ㎿㏿๓ฎ⌮࣭ᤕ㞟ἲࢆ☜❧ࡍࡿࠋ᫬㛫㐜ࢀ$ࡣࠊ133mXe (2.19 d), 133Xe (5.25d), 135Xe (9.10 h)࡞࡝༙ῶᮇࡢ␗࡞ࡿ」ᩘࡢ᰾✀ࢆ฼⏝ࡋ࡚ࠊ#⥺ᙉᗘẚ࠿ࡽồࡵࡿࠋಶࠎࡢᕼ
࢞ࢫ᰾✀ࢆᐃ㔞ࡍࡿሙྜࡣࠊ⛣⾜⋡ࡸᅇ཰⋡࡞࡝ㄗᕪせᅉࡀከᩘᏑᅾࡍࡿࡀࠊྠ఩య┦㛵ࢆ࡜ࡿࡇ࡜࡟ࡼࡾࡇࢀࡽࡢㄗᕪせᅉࡣ࠿࡞ࡾゎᾘࡉࢀࡿࠋࡑࡢࡓࡵࠊR0(Xe/Kr)ࡢ᥎ᐃ⢭ᗘࡀྥୖࡋࠊ᭷ຠ࡞ᮍ⮫⏺ᗘ┘どࡀᮇᚅ࡛ࡁࡿࠋ
ᮏἲ࡟ࡘ࠸࡚ࡣࠊணࡵ 244Cm ࡸ⃰⦰࢘ࣛࣥࢆ⏝࠸ࡓᇶ♏ⓗ࡞ヨ㦂ࢆ⾜࠸ࠊࣉ࣮ࣞ࢝ࢧ࣮ࡢ
ᣲື࡟㉳ᅉࡍࡿၥ㢟Ⅼ࡞࡝ࢆᩚ⌮ࡋࠊkeff ࢆຠᯝⓗ࡟ᚓࡽࢀࡿ᭱㐺᮲௳ࢆồࡵࡿࡇ࡜ࡀᮃࡲࢀ
ࡿࠋࡑࡢ㝿ࠊࡼࡾ▷ᑑ࿨ࡢᕼ࢞ࢫ᰾✀(87Kr (76 min), 138Xe (14.1 min)࡞࡝)ࡢ ᐃ࡟ࡼࡿᛂ⟅᫬㛫ࡢ▷⦰໬ࡀྍ⬟࠿᳨ウࡍࡿࠋࡲࡓࠊ୰ᛶᏊἲ࡜ࡢẚ㍑࡟ࡼࡾᮏἲࡢጇᙜᛶࡶ᳨ドࡍࡿࠋ1) ෆ⸨௚, ᪥ᮏཎᏊຊᏛ఍㺀2013 ᖺ⛅ࡢ኱఍㺁J48 (ඵᡞᕤᴗ኱Ꮫ, 2013 ᖺ 9 ᭶), ண✏㞟, p.450.
2) ⮻⏣௚, ➨ 15 ᅇ 㺀⎔ቃᨺᑕ⬟㺁◊✲఍ (KEK, 2014 ᖺ 3 ᭶), せ᪨ㄽᩥ㞟, No.6.
Consideration of sub-criticality monitoring method by measuring isotope ratio of FP rare gas!Focusing on collection of radioactive rare gas from the fuel debris!
USUDA, S., NAITO, Y.

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2A03⎔ቃ୰࡟࠾ࡅࡿ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ⏤᮶ࡢ࢘ࣛࣥ㺃㉸࢘ࣛࣥྠ఩య⤌ᡂ㸦⟃Ἴ኱ᩘ⌮ 1ࠊ㔠ἑ኱ LLRL2ࠊUniv. of Vienna3ࠊᮾ኱㝔⌮ 4㸧‫ۑ‬ᆏཱྀ⥤ 1ࠊᒣᮏᨻ൤ 2ࠊPeter Steier3ࠊ㧗ᶫ჆ኵ 4࠙ࡣࡌࡵ࡟ࠚ ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾ࡟ࡼࡾᨺฟࡉࢀࡓᨺᑕᛶ᰾✀ࡢ⎔ቃ୰࡟࠾ࡅࡿศ
ᕸࡸ⤌ᡂࡣࠊ≉࡟୺せᨺฟ᰾✀࡛࠶ࡿᨺᑕᛶࢭࢩ࣒࢘࡟㛵ࡋ࡚ྛ┬ᗇࡸᩘከࡃࡢ◊✲⪅ࡽ࡟ࡼࡾㄪᰝ㺃◊✲ࡀ⾜ࢃࢀࠊࡑࡢᐇែࡶẚ㍑ⓗ᫂ࡽ࠿࡟࡞ࡾࡘࡘ࠶ࡿࠋࡋ࠿ࡋࠊ㞴᥹Ⓨᛶ࡛࠶ࡾ
⅔⇞ᩱࡢ⤌ᡂ᝟ሗࢆᣢࡘ࡜ண᝿ࡉࢀࡿ࢘ࣛࣥ㺃㉸࢘ࣛࣥඖ⣲ྠ఩య࡟࠾࠸࡚ࡣࠊPu ྠ఩య୍࡛㒊ሗ࿌ࡀ࠶ࡿࡶࡢࡢࠊAmࠊCm ࡟㛵ࡋ࡚ࡣⓙ↓࡛࠶ࡿࠋ≉࡟ࠊCm ྠ఩యࡣ༙ῶᮇࡀ▷ࡃ
(242Cm㸸162.94 ᪥, 243Cm㸸18.1 ᖺ, 244Cm㸸29.1 ᖺ) ࠊα ᨺᑕయ࡜ࡋ࡚ࡑࡢேయᙳ㡪ホ౯ࡢほⅬ࠿ࡽࡶṇ☜࡞ᐃ㔞ࡣᚲ㡲࡛࠶ࡿࠋᮏ◊✲࡛ࡣࠊ᭱⤊ⓗ࡟ࡣྛ⅔ࡢ஦ᨾ᫬࡟࠾ࡅࡿ⇞ᩱ⤌ᡂࡸ⇞ᩱ࠿ࡽࡢᨺฟᙧែ࡞࡝ࢆ᫂ࡽ࠿࡟ࡍ࡭ࡃࠊ⚟ᓥཎᏊຊⓎ㟁ᡤ࿘㎶࠾ࡼࡧ⚟ᓥ┴ෆ࠿ࡽ᥇ྲྀ
ࡋࡓ⾲ᒙヨᩱ࡟࠾ࡅࡿ࢘ࣛࣥ㺃㉸࢘ࣛࣥඖ⣲⤌ᡂ࡟ࡘ࠸࡚᫂ࡽ࠿࡟ࡋࡓࠋ
࠙᪉ἲࠚ 㐨㊰⢊ࡌࢇ(㯮࠸≀㉁)ࠊࣜࢱ࣮ࠊᅵተࢥ࢔(┤ᚄ 6.5 cm ῝ࡉ 10 cm)ヨᩱࡣࠊ஦ᨾᩘ
ࣨ᭶ᚋ࠿ࡽ 2013 ᖺࡢ㛫࡟ࠊ㣤⯓ᮧࠊ༡┦㤿ᕷࠊᾉỤ⏫ࠊ཮ⴥ⏫ࠊ኱⇃⏫ࠊᐩᒸ⏫ࠊᴍⴥ⏫ࠊᗈ㔝⏫ࠊ࠸ࢃࡁᕷࡢྜィ 100 ᆅⅬ௨ୖ࠿ࡽ᥇ྲྀࡉࢀࡓࠋヨᩱࢆ㢼஝ᚋࠊ༑ศ࡟ᆒ㉁໬ࡋ Ge༙ᑟయ᳨ฟჾ࡛!⥺ ᐃࢆ⾜ࡗࡓࠋ࢘ࣛࣥ㺃㉸࢘ࣛࣥඖ⣲ྠ఩య ᐃࡢࡓࡵ࡟ࠊヨᩱࡢ୍㒊(ᩘ༑㹼ᩘⓒࢢ࣒ࣛ)ࢆศྲྀࡋࠊ450 ᗘ࡛⅊໬ࡋࡓヨᩱࢆ⃰◪㓟࡜ᑡ㔞ࡢ㐣㓟໬Ỉ⣲ࢆ⏝࠸࡚ 12 ᫬㛫↻Ἓᢳฟࡋࡓࠋࣜࢱ࣮ヨᩱ࡟㛵ࡋ࡚ࡣࠊࡇࢀࡽ㓟࡟㐣ሷ⣲㓟ࢆࡉࡽ࡟ຍ࠼࡚඲ศゎࡋࡓࠋࡑࢀࡒࢀࡢྠ఩య࡟㐺ࡋࡓᡭἲ࡟ࡼࡾ⃰⦰⢭〇ศ㞳ࢆ⾜࠸ࠊ236U/238U ࡣ AMS ࡛ࠊ238U ࠾ࡼࡧ
239
Pu/240Pu ࡣ ICP-MS ࡛ࠊ 238Pu, 239+240Pu, 241Am, 242Cm, 243+244Cm ࡣ"⥺ ᐃ࡟࡚ᐃ㔞ࡋࡓࠋ࠙⤖ᯝ㺃⪃ᐹࠚ ᅵተࢥ࢔ศᯒ࠿ࡽᚓࡽࢀࡓ 137Cs ⵳✚㔞ࡣࠊ⣙ 100 – 17000 kBq/m2 ࡢ⠊ᅖ࡛࠶ࡾኴᖹὒഃ࡟࠾ࡅࡿࢢ࣮ࣟࣂࣝࣇ࢛࣮ࣝ࢔࢘ࢺ 137Cs ࡢ 100-10000 ಸ࡜㠀ᖖ࡟㧗⵳✚㔞࡛࠶ࡗࡓࠋ୍᪉ Pu ⵳✚㔞ࡣ 0.24-55 Bq/m2 ࡛࠶ࡾࠊཎᏊຊⓎ㟁ᡤ஦ᨾ⏤᮶ࡢ Pu ࡣᖹᆒࡍࡿ࡜ 0.20s
0.37 Bq/m2 ࡜ぢ✚ࡶࡽࢀࡓࠋࡇࢀࡣࠊᡃࠎࡢࢢ࣮ࣝࣉ࡟ࡼࡾሗ࿌ࡉࢀ࡚࠸ࡿࢢ࣮ࣟࣂࣝࣇ࢛࣮
ࣝ࢔࢘ࢺ Pu(⣙ 40-50 Bq/m2)ࡼࡾࡶ࠿࡞ࡾప⵳✚㔞࡛࠶ࡾࠊཎᏊ⅔࠿ࡽࡢᐤ୚ࡣᑠࡉ࠸ࡇ࡜ࡀ
᫂ࡽ࠿࡟࡞ࡗࡓࠋᅵተࠊࣜࢱ࣮ࠊ㯮࠸≀㉁୰ࡢ࢘ࣛࣥ㺃㉸࢘ࣛࣥඖ⣲ྠ఩యศᯒࡢ⤖ᯝࢆ௨ୗࡢ⾲࡟♧ࡍࠋPu/137C ẚࡣཎᏊ⅔ෆ࡛ࡢ⤌ᡂ࡜኱ࡁࡃ␗࡞ࡾࠊ᥹Ⓨᛶ࡛࠶ࡿ Cs ࡀᅽಽⓗ࡟ᨺฟ㺃ỿ╔ࡋ࡚࠸ࡿࡇ࡜ࡀศ࠿ࡿࠋ࢘ࣛࣥ㺃㉸࢘ࣛࣥඖ⣲ẚࡣࠊすཎࡽ(2013)࡟ࡼࡾぢ✚ࡶࡽࢀࡓ
⅔ෆࡢ⤌ᡂẚ࡜኱ࡁࡃ㐪ࢃࡎࠊぢ✚ࡶࡾࡀ☜࠿ࡽࡋ࠸ࡇ࡜ࠊ࠿ࡘࡇࢀࡽྠ఩యࡣཎᏊ⅔ෆࡢ
⤌ ᡂ ࢆ ಖ ࡗ ࡓ ࡲ ⚟ᓥ┴ෆ䛛䜙᥇ྲྀ䛧䛯ᅵተ䚸䝸䝍䞊䚸㯮䛔≀㉁୰䛾䜴䝷䞁䡡㉸䜴䝷䞁⤌ᡂ (Sakaguchi et al., 2014; Yamamoto et al. 2014)ヨᩱ୰䛾ᨺᑕ⬟ẚཎᏊ⅔䝁䜰୰䛾䜲䞁䝧䞁䝖䝸㻖ࡲ⎔ቃ୰࡟ᨺฟ
᰾✀⤌ᡂ
1ྕ⅔
2ྕ⅔
3ྕ⅔
ヨᩱᩘ
ᖹᆒ್
୰ኸ್
137
-3
-3
-7
-7
ࡉࢀ࡚࠸ࡿࡇ࡜
0.754
137
Pu/ Cs
7.86x10(2.34㼼3.50)x10
1.29x109.96x10236
239+240
-4
-4
-4
-4
-4
12
U/
Pu
3.63x10 3.66x10 2.84x10
5.12x10(5.84㼼4.43)x10
ࡀ᫂ࡽ࠿࡟࡞ࡗ
238
239+240
2.90
2.38
2.30
137
1.73±0.75
1.79
Pu/
Pu
ࡓࠋࡲࡓࠊཎᏊ⅔
241
0.35
0.23
0.23
122
0.56±0.16
0.54
Am/239+240Pu
242
࠿ࡽࡢ㊥㞳ࡸ᪉
56.1
46.5
43.3
122
28.1±13.1
26.7
Cm/239+240Pu
242
239+240
32.5
27.6
20.0
122
28.3±9.925
Cm/
Cm
ྥ࡟ᐤࡿ⤌ᡂࡢ
234+244239+240
1.72
1.68
2.16
122
1.10±0.61
1.06
Cm/
Pu
㐪࠸ࡣࠊࡣࡗࡁࡾAtom ratio࡜ࡣぢࡽࢀ࡞࠿
240
0.34
0.32
0.36
9
0.33±0.02
0.34
Pu/239Pu*:すཎ䜙 (2013)
ࡗࡓࠋIsotopic composition of Uranium and Transuranium in the environment derived from
Fukushima Dai-ichi Nuclear Power Plant accident
SAKAGUCHI,A.,YAMAMOTO., M., STEIER,P., TAKAHASHI,Y.

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2A04

㟁㢧࣮࢜ࢺࣛࢪ࢜ࢢࣛࣇ࢕࣮ࢆ⏝࠸ࡓ㔠㞼ẕ୰ᨺᑕᛶࢭࢩ࣒࢘ࡢ
ᒁᡤⓗศᕸࡢほᐹ⚟኱⌮ᕤ ࠊ⚟኱⎔ቃ◊   ‫ۑ‬బࠎᮌ⨾㞷 ࠊ㧗℩ࡘࡂᏊ ࠊᒣཱྀඞᙪ ࠙⥴ゝࠚ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤࡢ஦ᨾ࡟ࡼࡾࠊከ㔞ࡢ䝃䞁䝥䝹Ὑί㻌ᨺᑕᛶ≀㉁ࡀ⎔ቃ୰࡟ᨺฟࡉࢀࡓࠋࡑࡢ⤖ᯝࠊᨺฟࡉ
ࢀࡓᨺᑕᛶ≀㉁ࡢ୍✀࡛࠶ࡿᨺᑕᛶ Cs ࡀᅵተ୰࡟྾╔㻿㼏㼛㼠㼏㼔㻌㼙㼑㼠㼔㼛㼐ࡉࢀࡓࠋ࣐ࢡࣟ࡞ autoradiography㸦ARG㸧࡟ࡼࡿほᐹ࡟ࡼࡗ࡚ࠊᅵተ୰ࡢ⢓ᅵ㖔≀࡟ᨺᑕᛶ Cs ࡀ྾╔ࡋࡸࡍ࠸ங๣ሬᕸ㻌ࡇ࡜ࡣ᫂ࡽ࠿࡟࡞ࡗ࡚ࡁ࡚࠸ࡿࡀࠊImaging Plate ἲ㸦IP䠍䞃᭶㟢ග㻌 㻌 㻌 ᬯᐊ䠄෭䠅䞉‵ᗘప㻌ἲ㸧࡞࡝࡛ࡣศゎ⬟ࡀప࠸ࡓࡵࠊ࣑ࢡࣟ࡞ᵓ㐀࡜ᨺᑕᛶ᰾✀ࡢ྾╔࣭ಖᣢᶵᵓࡢ㛵㐃ᛶࢆ㆟ㄽࡍࡿࡇ࡜ࡀᅔ
⌧ീᾮ䠄㻞㻜䡚㻟㻜㼟䠅㻌㞴࡛࠶ࡗࡓࠋᮏ◊✲࡛ࡣங๣ࢆ⏝࠸ࠊ㟁Ꮚ㢧ᚤ㙾࡛ほỈὙ䛔㻌ᐹࢆ⾜࠺㟁㢧 ARG ࡟ࡼࡾࠊ㔠㞼ẕ୰ᨺᑕᛶ Cs ࡢ࣑ࢡᐃ╔ᾮ䠄㻠㻜䡚㻡㻜㼟䠅㻌ࣟ࡞ᒁᡤⓗศᕸࡢほᐹࢆヨࡳࡓࠋỈὙ䛔䞉஝⇱㻌ᅗ㸯ࡢࡼ࠺࡟࡞ࡿࠋὙί
࠙ᐇ㦂ࠚ㟁㢧 ARG ࡢᡭ㡰ࡣࠊᅗ㻿㻱㻹 ほᐹ㻌ࡋࡓ㔠㞼ẕࡣࠊScotch tape method ࡟ࡼࡾⷧ∦ฎ⌮ࡋࠊIP
࡛཯ᛂࡀぢࡽࢀࡓࡶࡢࢆᐇ㦂࡟⏝࠸ࡓࠋࡲࡓ཯ᛂࡀぢ ᅗ䠍㻌㻌 㟁㢧䜸䜸䞊䝖䝷䝆䜸䜾䝷䝣䜱䞊ᐇ㦂ᡭ㡰㻌ࡽࢀࡓࡶࡢ࡟ᑐࡋ࡚ࠊGe ༙ᑟయ᳨ฟჾ࡟ࡼࡿ ᐃࢆ⾜࠸ࠊᨺᑕᛶ Cs ࡀྵࡲࢀ࡚࠸ࡿ࠿☜ㄆࢆ⾜ࡗࡓࠋங๣ࡣỈ࡛  ಸ⛬ᗘ࡟ᕼ㔘ࡋࡓࡶࡢࢆ౑⏝ࡋࠊࡑࢀࢆ㔠㞼ẕ࡟ሬᕸࡋࡓᚋ࡟ᬯᐊ࡛㟢ගࡋࡓࠋ⌧ീฎ⌮ࡋࡓᚋࠊSEM࣭EDX ࡟ࡼࡾ Ag
ࡢほᐹࢆ⾜ࡗࡓࠋ
࠙⤖ᯝࠚ⌧ീฎ⌮ࡋࡓ㔠㞼ẕࢆ཯ᑕ㟁Ꮚࢆ⏝࠸ࡓ SEM ࡟ࡼࡿほᐹࢆࡋࡓ⤖ᯝࠊᅗᅗ㸰ࡢࡼ࠺࡞
5 ੇ⛬ᗘࡢ Ag ࡢ⢏ࡀぢࡽࢀࡓࠋ኱ࡁࡉࡣࢧࣥࣉࣝ࡟ࡼࡗ࡚␗࡞ࡾᩘੇ㹼ᩘ༑ੇ࡛ࠊ⢏≧ࡢࡶࡢࡀ㐃࡞ࡗࡓࡼ࠺࡞ᙧ≧࡛࠶ࡿࠋࡇࡢᙧ≧ࡣ⌧ീฎ⌮᫬㛫ࠊࢧࣥࣉࣝࡢᨺᑕ⬟࡟ࡼࡗ࡚ኚ໬ࡋࡓࠋEDX ീࢆぢࡿ࡜ࠊAg ࡜ඹ࡟ S ࡀᒁᅾࡋ࡚࠸ࡿࡢࡣࠊᐃ╔ᮦࡀ Ag ࡜ඹ࡟ṧ␃ࡋࡓࡵ࡛
࠶ࡿࠋK ศᕸࢆぢࡿ࡜ࠊᒁᅾࡋ࡚࠾ࡽࡎࠊᆒ୍࡟ K ࡀ࠶ࡿ୰࡛ K40 ࡀᒁᡤⓗ࡟Ꮡᅾࡍࡿྍ⬟ᛶࡣప࠸ࠋࡼࡗ࡚ K40 ࠿ࡽࡢ཯ᛂ࡛ࡣ࡞࠸࡜⪃࠼ࡽࢀࡿࠋ
࠙ࡲ࡜ࡵࠚᩘ༑ੇ༢఩࡛㔠㞼ẕୖࡢᨺᑕᛶ Cs ࡢᒁᡤⓗศᕸࢆほᐹࡍࡿࡇ࡜ࡀ࡛ࡁࡓࠋࡇࡢᡭ
ἲࡣ㔠㞼ẕࡔࡅ࡛࡞ࡃ௚ࡢ≀㉁࡬ࡢᛂ⏝ࡶྍ⬟࡛࠶ࡾࠊᨺᑕᛶ᰾✀ࡢ྾╔ᙧែ࣭ಖᣢᶵᵓࡢ
ゎ᫂࡟᭷ຠ࡞ᡭẁ࡟࡞ࡿ࡜⪃࠼ࡽࢀࡿࠋ

㸦DD㸧
㸦EE㸧

ᅗ䠎㻌㻌 㔠㞼ẕୖ䛻ᯒฟ䛧䛯 㻭㼓 䛾ᵝᏊ㻌㻌㻔㼍㻕䠖㽢㻝㻚㻜㻜㼗㻌㻿㻱㻹㻌 㻌 㻔㼎㻕䠖㽢㻡㻚㻜㻜㼗㻌㻱㻰㼄㻌 䠄ᕥୖ䠖㟁㢧ീ㻌 ྑୖ䠖㻷 ศᕸ㻌 ᕥୗ䠖㻭㼓 ศᕸ㻌 ྑୗ䠖㻿 ศᕸ䠅㻌

Microscopic distribution radioactive Cs in the phlogopite, using electron microscope autoradiography.
SASAKI, M.,TAKASE, T., YAMAGUCHI, K..

- 62 -

2A05⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤࡢ⁫␃Ỉ࡟ྵࡲࢀࡿ =U ࡢศᯒཎᏊຊᶵᵓ   ‫ۑ‬ᓥ⏣ளబᏊ ࠊடᑿ⿱ ษ∦FSV࣭SSE

ഴࡁFSV࣭SSE࠙⥴ゝࠚ ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ࡛Ⓨ⏕ࡋࡓ⁫␃Ỉࡢฎ⌮࡟࠾࠸࡚ࢫࣛࢵࢪ➼ࡢ஧ḟᗫᲠ≀ࡀ
Ⓨ⏕ࡍࡿࠋࡑࡢฎศࡢࡓࡵ࡟ࡣ஧ḟᗫᲠ≀୰ࡢᨺᑕᛶ᰾✀⃰ᗘࢆホ౯ࡍࡿᚲせࡀ࠶ࡿࡀࠊ┤᥋ࢫࣛࢵࢪ➼ࢆศᯒࡍࡿࡇ࡜ࡀᅔ㞴࡛࠶ࡿࡓࡵࠊฎ⌮๓ᚋࡢởᰁỈࢆ᥇ྲྀࡋࠊ㛫᥋ⓗ࡟࢖ࣥ࣋ࣥࢺ࣮ࣜࢆホ౯ࡋ࡚࠸ࡿࠋホ౯ᑐ㇟ೃ⿵᰾✀࡜ࡋ࡚ 93Zr ࢆྵࡴ⣙ 40 ᰾✀ࡀ㑅ᐃࡉࢀࠊศᯒ
ࡀ㐍ࡵࡽࢀ࡚࠸ࡿࡀࠊ93Zr ࡟㛵ࡋ࡚ࡣศᯒἲࡀ☜❧ࡉࢀ࡚࠸࡞࠿ࡗࡓࠋࡑࡇ࡛ࠊTEVA ࣞࢪࣥࢆ⏝࠸࡚ ZrࠊNb ཬࡧ Mo ࢆᶍᨃᾏỈᡂศ࠿ࡽศ㞳ࡋࡓᚋࠊࡉࡽ࡟ࡑࢀࡒࢀࢆ┦஫ศ㞳ࡍࡿศ㞳ἲࢆ㛤Ⓨࡋࡓ 1ࠋ௒ᅇࠊࡇࡢศ㞳ἲࢆ㐺⏝ࡋࠊ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤࡢ⁫␃Ỉ࡟ྵࡲࢀࡿ 93Zr ࢆศᯒࡋࡓࡢ࡛ࠊࡑࡢ⤖ᯝ࡟ࡘ࠸࡚ሗ࿌ࡍࡿࠋ
࠙ᐇ㦂ࠚ0.1 ml ࡢ⁫␃Ỉ࡟ 3 ml ࡢ 0.01 M HF ࢆຍ࠼࡚⁫␃Ỉヨᩱࢆㄪ〇ࡋࡓࠋࡲࡓࠊྠᵝࡢ⁫␃Ỉヨᩱ࡟ 50 μl ࡢ 2 ppm 90Zr ⃰⦰ྠ఩య⁐ᾮࢆῧຍࡋࡓࢫࣃ࢖ࢡヨᩱࡶㄪ〇ࡋࡓࠋࡇࢀࡽ
ࡢヨᩱ⁐ᾮࢆ࠶ࡽ࠿ࡌࡵࢥࣥࢹ࢕ࢩࣙࢽࣥࢢࡋࡓ TEVA ࣞࢪࣥ(1 ml)࡟㏻ᾮࡋࠊ
13.6 ml ࡢ 0.01
M HF ࡛࣒࢝ࣛࢆὙίࡋࡓࠋࡑࡢᚋࠊ6.8 ml ࡢ 7 M HCl㸫0.5 M HF ࡟ࡼࡾ Zr ࢆᅇ཰ࡋࠊㄏᑟ
⤖ྜࣉࣛࢬ࣐㉁㔞ศᯒィ(ICP-MS)࡟ࡼࡾᐃ㔞ࡋࡓࠋ࠙⤖ᯝ࡜⪃ᐹࠚZr ࣇࣛࢡࢩࣙࣥࡢ㉁⾲ Zr ࣇࣛࢡࢩࣙࣥࡢ㉁㔞ᩘ 93 ࡛ࡢィᩘ⋡(cps)㔞ᩘ 93 ࡛ࡢィᩘ⋡ࢆ⾲࡟♧ࡍࠋ⁫␃
ࣈࣛࣥࢡ
⁫␃Ỉヨᩱ
ࢫࣃ࢖ࢡヨᩱ
Ỉヨᩱ࡜ࢫࣃ࢖ࢡヨᩱࡢィᩘ⋡ࡣࣈィᩘ⋡239s11
246s14227s8.1
ࣛࣥࢡࡢィᩘ⋡࡜ㄗᕪࡢ⠊ᅖ୍࡛⮴ࡋ࡚࠾ࡾࠊ᭷ព࡞ 93Zr ࡣ᳨ฟࡉࢀ࡞
ഴ䛝䚷ᐇ ್
ษ∦ᐇ ್
32
10࠿ࡗࡓࠋࣈࣛࣥࢡヨᩱࡢィᩘ⋡࡜ᶆഴࡁィ⟬್
ษ∦ィ⟬್ 10
11.5
12‽೫ᕪ࠿ࡽồࡵࡽࢀࡓ᳨ฟ㝈⏺࡛ࡢィᩘ⋡ࡣ 272 cps ࡛࠶ࡗࡓࠋࡲࡓࠊῧ
10
11
ຍࡋࡓ 90Zr ࡢᐃ㔞್࠿ࡽồࡵࡓ Zr
8ࡢᅇ཰⋡ࡣ 100s2%࡛࠶ࡗࡓࠋኳ↛10.5⤌ᡂࡢ Zr ᶆ‽⁐ᾮࢆㄪ〇ࡋࠊ㉁㔞ᩘ
6
90, 91, 92, 94, 96 ࡛ࡢィᩘ⋡࠿ࡽస〇
10
4ࡋࡓ᳨㔞⥺ࡢഴࡁ࡜ษ∦ࢆᅗ࡟♧ࡍࠋ㉁㔞ᩘ 91 ࠿ࡽ 94 ࡟࠾࠸࡚ࠊ༢ㄪ࡞
9.5
2
ῶᑡࡀぢࡽࢀࡓࡓࡵࠊ㉁㔞ᩘ 93 ࡛ࡢ
90᳨㔞⥺ࡣࠊ㉁㔞ᩘ 92 ࡜ 94 ࡢഴࡁ࡜









㉁㔞ᩘ
ษ∦ࡢᖹᆒ್ࢆ⏝࠸࡚ᑟฟࡋࡓࠋࡇ
ࡢ᳨㔞⥺࡜ヨᩱ㔞➼࡟ᇶ࡙࠸࡚⟬ฟ ᅗ ㉁㔞ᩘ 90 , 91, 92, 94, 96 ࡛ࡢ Zr ࡢ᳨㔞⥺ࡢഴࡁ࡜ࡋ ࡓ ⁫ ␃ Ỉ ୰ ࡢ 93Zr ⃰ ᗘ ࡣ 0.1
ษ∦࡜⟬ฟࡉࢀࡓ㉁㔞ᩘ 93 ࡛ࡢ᳨㔞⥺ࡢഴࡁ࡜ษ∦ng/mL(9 mBq/ml)௨ୗ࡛࠶ࡗࡓࠋ
ᮏ◊✲ࡣࠊ⤒῭⏘ᴗ┬㈨※࢚ࢿࣝࢠ࣮ᗇ࠿ࡽࡢጤク࡟ࡼࡿࠕᖹᡂ 25 ᖺᗘⓎ㟁⏝ཎᏊ⅔➼ᗫ
⅔࣭Ᏻ඲ᢏ⾡ᇶ┙ᩚഛ(஦ᨾᗫᲠ≀ฎ⌮࣭ฎศᴫᛕᵓ᝿࡟ಀࡿᢏ⾡᳨ウㄪᰝ)ࠖࡢ୍㒊࡜ࡋ࡚ᐇ᪋ࡋࡓࡶࡢ࡛࠶ࡿࠋ
1 A. Shimada, K. Takahashi, Radchem 2014 せ᪨
Analysis of 93Zr in the contaminated water generated at the Fukushima Daiichi Nuclear Power Station
Shimada, A., Kameo, Y..

- 63 -

2A06

Ἑᕝ୰ࡢࢭࢩ࣒࢘ ࠊ ࡜ࣚ࢘⣲  ࡢᣲື㸦⟃Ἴ኱ᩘ⌮ 1ࠊ⟃Ἴ኱Ꮫ㝔ᩘ⌮ 2ࠊ⟃Ἴ኱Ꮫᇶ┙ࢭ 3ࠊᮾ኱ MALT4ࠊᮾ኱⏕◊ 5ࠊᮾ㎰ᕤ኱㝔㎰ 6䚸ᮾ኱㝔᪂㡿ᇦ 7㸧‫ۑ‬ᮎᮌၨ௓ 1ࠊᰘᒣᑦ኱ 2ࠊబ⸨ᚿᙪ 2ࠊ➲බ࿴ 1ࠊ㧗ᶫົ 3ࠊᯇ୰ဴஓ 3ࠊᯇᮧ୓ᑑ⨾ 3ࠊᯇᓮᾈஅ 4ࠊᮧୖ㐨ኵ 5ࠊᒣୗ㯇 6䚸Mahua Saha6䚸㧗⏣⚽㔜 6䚸㩾ῡᖾ⏕ 7䚸Soulichan Lamxay7䚸
࿋ᾏ㙂 7䚸Ᏺ฼ᝅᮁ 5ࠊἈ኱ᖿ 5ᮾ㟁⚟ᓥ➨୍ཎⓎ஦ᨾ௨᮶䚸㝣ᇦ䛻䛚䛡䜛ᨺᑕᛶ䝉䝅䜴䝮䛾⛣ὶᣑᩓ䛾ၥ㢟䛿኱䛝䛟ྲྀ䜚ୖ䛢䜙䜜ᵝ䚻䛺◊✲⪅䛻䜘䛳䛶䛭䛾ືែ䛜◊✲䛥䜜䛶䛔䜛䚹䛧䛛䛧䚸ᨺᑕᛶ䝶䜴⣲䛻㛵䛧䛶䛿ཎⓎ஦ᨾᙜึ኱䛝䛺ၥ㢟䛸䛺䛳䛯䝶䜴⣲ 131 䛜ᩘ䛛᭶䛷᳨ฟ䛩䜛䛣䛸䛜୙ྍ⬟䛸䛺䜚䚸䛭䛾⛣ὶᣑᩓ䛻㛵䛧䛶䛾ሗ࿌䛿䜋䛸䜣䛹䛺䛔䚹ᮏ◊✲䛷䛿䚸㛗ᑑ࿨᰾✀䝶䜴⣲ 129 䜢⏝䛔䛶ἙᕝỈ୰䛷䛾䝶䜴⣲䛾ືែ◊✲䜢⾜䛳䛯䚹㛗ᮇ
ほ 䛾䝣䜱䞊䝹䝗䛸䛧䛶㛵ᮾ䛾ᕷ⾤ᆅ䛜㐺ᙜ䛻Ⓨ㐩䛧䛶䛔䜛༓ⴥ┴኱ᇼᕝ䜢㑅䜃䚸ᠱ⃮≀㉁ SS 䛸⁐Ꮡែ DM 䜢୰ᚰ䛻Ἑᕝὶᇦㄪᰝཬ䜃⤒᫬ኚ໬䛾ㄪᰝ䜢⾜䛳䛶䛔䜛䚹㻞㻜㻝㻞 ᖺ䠐᭶䛛䜙Ἑᗏ㉁ᅵ䚸ᠱ⃮≀㉁୰䛾ᨺᑕᛶ䝉䝅䜴䝮⃰ᗘ䛚䜘䜃⁐Ꮡែ୰䛾ᨺᑕᛶ䝉䝅䜴䝮⃰ᗘ䛸㛗ᑑ࿨ᨺᑕᛶ᰾✀ 㻝㻞㻥㻵 䛾㛗ᮇኚື䜢
ほ 䛧䛯䚹୰㛫ᆅⅬ䛾᫛࿴ᶫ䛻 㻿㻿 䝃䞁䝥䝷䞊䜢タ⨨䛧ᠱ⃮≀㉁䜢 㻞 㐌㛫䛛䜙 㻝 䛛᭶䛤䛸䛻ᅇ཰䛧䚸ྠ᫬䛻Ἑᕝ⾲ᒙỈ䜢᥇ྲྀ䛧⣙ 㻞 ᖺ㛫䛾⤒᫬ኚ໬䜢㏣䛳䛯䚹㻞㻜㻝㻞 ᖺ 㻠 ᭶䚸㻝㻝 ᭶䚸㻞㻜㻝㻟 ᖺ 㻠 ᭶䛾 㻟 ᅇ䛻䜟䛯䜚኱ᇼᕝὶᇦ䛾䠑䡚㻤 䞄ᡤ䛷᥇ྲྀ䛧䛯䚹㻌᥇ྲྀ䛧䛯ἙᕝỈ䛿 㻜㻚㻣䃛㼙 䛾䝣䜱䝹䝍䞊䠄䝽䝑䝖䝬䞁 㻳㻲㻛㻲䠅䛷䜝㐣䛧䛶ᠱ⃮≀㉁䜢ᅇ཰䛧䚸䜝㐣Ỉ䛿෌ᗘ 㻜㻚㻞䃛㼙 䛾䝣䜱䝹䝍䞊䠄䜰䝗䝞䞁䝔䝑䜽ぶỈᛶ 㻼㼀㻲㻱䠅䛷䜝㐣䛧䛯䚹ᠱ⃮≀㉁䛿 㻜㻚㻣䃛㼙 䛾䝣䜱䝹䝍䞊䛸୍⥴䛻䚸䜝㐣Ỉ䛿 㻞㻸 䝬䝸䝛䝸ᐜჾ䛻䛔䜜䛶䃒⥺ ᐃ䜢⾜䛔 㻝㻟㻣㻯㼟 䛾⃰ᗘ䜢ồ䜑䛯䚹䜝㐣Ỉ䠍㻸 䜢⏝䛔䛶⁐፹ᢳฟἲ䛷䝶䜴⣲䜢ྲྀ䜚ฟ䛧䛯䚹ྠᵝ䛻Ἑᗏ㉁ᅵ䛿෾⤖஝⇱䛥䛫䛶䛛䜙 㼁㻤 ᐜჾ䛻ධ䜜䛶䃒⥺ ᐃ䛷 㻝㻟㻣㻯㼟䛾⃰ᗘ䜢ồ䜑䚸䛭䛾䛾䛱䝪䞊䝹䝭䝹䜢⏝䛔䛶⢊ᮎ≧䛻䛧䛯ヨᩱ䛛䜙 㻜㻚㻞䠉㻜㻚㻡䡃ศྲྀ䛧䛶䚸㻝㻜㻜㻜䉝䛷ຍ⇕䛧䚸ᨺฟ䛥䜜䛯䝶䜴⣲䜢 㼀㻹㻭㻴 Ỉ䛻ᤕ㞟䛧䛯䚹ἙᕝỈ䛛䜙䛾┤᥋䛾⁐፹ᢳฟ䛚䜘䜃䝖䝷䝑䝥Ỉ䛛䜙䛿ᢸయ䛸䛧䛶᪤▱㔞䛾䝶䜴⣲䜢ຍ䛘䛶䚸䝶䜴໬㖟䛸䛧䛶ᅇ཰䛧䚸ᮾ኱ 㻹㻭㻸㼀㻙㻭㻹㻿 䛷 㻝㻞㻥㻵 䜢 ᐃ䛧䛯䚹ヨᩱ䛻ྵ䜎䜜䜛䝶䜴⣲㔞䛿 㻵㻯㻼㻙㻹㻿 䜢⏝䛔䛶 㻝㻞㻣㻵 䛾⃰ᗘ䜢ồ䜑䛯䚹㻌㻞㻜㻝㻞 ᖺ 㻡 ᭶䛛䜙኱ᇼᕝ䛾୰㛫ᆅⅬ䛾᫛࿴ᶫ䛻䛚䛔䛶䛿ᾋ㐟◁䝃䞁䝥䝷䞊䛸䛭䛾ሙ䛷䛾Ἑᕝ⾲ᒙỈ᥇ྲྀ䜢⾜䛳䛶⣙ 㻞 ᖺ㛫䛾⤒᫬ኚ໬䜢㏣䛳䛯䚹ἙᕝỈ୰䛾⁐Ꮡែ䛸䛧䛶䛾ᨺᑕᛶ䝉䝅䜴䝮⃰ᗘ䛿ᠱ⃮≀㉁䛾 㻝㻜㻙㻡 䛸㠀ᖖ䛻ప䛔⃰ᗘ䜢♧䛩䚸ᠱ⃮≀㉁䛸⁐Ꮡែ୰䛾ᨺᑕᛶ䝉䝅䜴䝮⃰ᗘ䛿䛛䛺䜚Ⰻ䛔┦㛵䜢♧䛧䛶䛔䛶䚸ศ㓄ಀᩘ䛸䛧䛶㼇㻿㻿㼉㻛㼇㻰㻹㼉㻩㻠㻚㻜㽢㻝㻜㻠 䛜ᚓ䜙䜜䛯䚹ᨺᑕᛶ䝉䝅䜴䝮䜈䛾ㄪᰝ䛸䛸䜒䛻⾜䜟䜜䛯 㻝㻞㻥㻵 䛾⁐Ꮡែ୰䛾⃰ᗘኚ໬䛿ᨺᑕᛶ䝉䝅䜴䝮䛾䛭䜜䛸ᙉ䛔┦㛵䜢♧䛧䛶ኚື䛧䛶䛔䜛䛣䛸䛜ศ䛛䛳䛯㻔ᅗ㻕䚹㻞㻜㻝㻞 ᖺ 㻠 ᭶䚸㻝㻝 ᭶䚸㻞㻜㻝㻟 ᖺ 㻠 ᭶䛾 㻟 ᅇ䛻䜟䛯䜚኱ᇼᕝὶᇦ䛾䠑䡚㻤 䞄ᡤ䛷᥇ྲྀ䛧䛯ἙᕝỈ䛾⁐Ꮡែ୰䛾 㻝㻟㻣㻯㼟㻘㻌㻝㻞㻥㻵 ⃰ᗘ䜢ᚓ䛯䚹䝉䝅䜴䝮 㻝㻟㻣 䜒䝶䜴⣲ 㻝㻞㻥 䛾䛹䛱䜙䛾᰾✀䛻䛚䛔䛶䜒䚸᪂㥖ᮌᶫ䛛䜙᪂ᶫ䛾㛫䛷⃰ᗘ䛾పୗ䜢♧䛧䚸᫛࿴ᶫ䛛䜙࿧ሯᶫ䛾㛫䛷⃰ᗘୖ᪼䜢♧䛧䛯䚹䛭䛾⃰ᗘኚ໬䛿䚸๓⪅䛜኱ᇼᕝί໬஦ᴗ䛾䛯䜑䛻฼᰿ᕝ䛛䜙Ụᡞᕝ䜈䛴䛺䛠໭༓ⴥᑟỈ䜢᪂㥖ᮌᶫୗὶ䛷䛾ὶධ䛸࿧ሯᶫୖὶ䛷䛾ᆅ㔠᥀䛛䜙䛾ὶධ䛜䛒䜚䚸䛭䛾ᙳ㡪䛻㉳ᅉ䛩䜛䚹䛣䛣䛷䜒⁐Ꮡែ୰䛾
Fig. 137Cs vs. 129I in dissolved matter at㻝㻟㻣㻝㻞㻥㻯㼟㻘㻌 㻵 䛿Ⰻ䛔┦㛵䜢♧䛧䛯䚹㻌
Showa-bashi, Ohori River.

Behavior of Cesium-134, 137 and Iodine-129 in River
SUEKI, K., SHIBAYAMA, N., SATOU, Y., SASA, K., TAKAHASHI, T., MATSUNAKA, T.,
MATSUMURA, M., MATSUZAKI, H., MURAKAMI, M., YAMASHITA, R., SAHA , M., TAKADA,
H., KOIBUCHI, Y., LAMXAY, S., O, H., MOURI, G., OKI, T.

- 64 -

2A07!!""#$%&'(#$%&)'()*+,-.*/0+123 +,- 45
67895:8;<= >?@ABC>?DAB ,!"#$%&' (!)$$*+,- .!/0- 123$456 (!789: .!!
+;<= (!$<>? 1!@ABC .!

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15  3  23 j[J 1  ¡aJ$*@\bo Cs tuv¢M`"£i[!i_J SPM ¤¥JU¦v§¨|}!©\bcVªi[|«¬­^_h!j`!134Cs/137Cs
dMaMNO®¯_h°±`"!'(]! SPM [²{^_`³´Jµ´¶·¸Me!1  ¡aJ SPM ¹(º»¼½a¾¿)[^_}|h"Àº»¼½[ SPM ^_`vÁÂ`n!1 º»¼½¡aMÃÄ!ÅÆ­Â{¤¥vÇÈ`"i_J­Â[w_`ÀMh 2011
 3  11  24 j[J$*@ 137Cs tuJÉÊËÌÍÎM|}!Ï´Ð½¼¶¦J¤¥v{|}ÑÒ´ÓÔÌ¶Õ´½MNhÖ´½ÍÓÖÌÍÎ×(ØÙ e 1   2 )v|!º»¼½Ú[J\bcÛuJKÜv°±`"j`!134Cs J 604 keV JÝÞ
10 ßàáÔ½âãw_hNäM Ge åæ]ç[è­Â`"!)*+,-&. 27!"#$%"&/. '()*+,-.)/00 1 2 34 56789:;<=/06>?@ABCDDEFGHI JKL 0;78MINOPQRS3T!0UQNOPVWXY>9:DZ[*[;1 2 \3 5S;]^I_`0QNOPVWSaB*CDZbé!"#$%&!'#$ ()! *+,- (./01 2 (.301 4567849:;<=>?> (ê@!2 (ê3!4ABCD
EFGHI-4J!KLABCD4MNIOPJQR,-STU!VWX4YZ[QJ<\]VWXJ4^_`QJabc4QREd\GS"efgJUhi>HI-^_`QEj (Uk,lABCD<m ëê/@!2"n2op4 qrs ab4 (./01ì(.301 ^_`Q< ëêtt( Ju-v!
wx ëêyyt 2 ëêt3@ Ju-abvzf,-"{>i4^_`Q<!YZ[QU|},-2 (êë.!
ëêt.(!(êë( 2\-"YZ[Qv ëêt.( Ju-ab<!. ~ (.  .(./ XUw KL
U,-4 . JVWN>S 
qrs JuGS"{><!. ~ (.  (@ X . 
U{GS ( 4 UGHYN>S
2i>!iUKL  . ¡¢£UK
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L¤¥N>S ( ¦§J4YZ[Qlëêt/(#
4;U¨I"w©!YZ[Q (êë( <!. ~ (4 3b JKL cdI 31efgh31ifg jklmZcdS;jk
UVWN>S qrs 4ªJ«¬N>S"{>lmIn9opI*+qropIstu65vDZb
u-­i>S ®8vu-4¯°>\I"!
Autoradiography and 134Cs/137Cs ratios of SPM collected at automated SPM monitoring stations at the
FDNPP accident.
OURA, Y., TSURUTA, H., EBIHARA, M., OHARA, T., NAKAJIMA, T..

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2A08⚟ᓥ➨୍ཎᏊຊ஦ᨾึᮇ࡟᥇ྲྀࡉࢀࡓ኱Ẽヨᩱ୰ࡢ %Dࡢศᯒ
㜰኱⌮ ࠊⲈᇛ኱⌮ ࠊᮾ኱኱Ẽᾏὒ◊ ࠊẼ㇟◊  ‫ۑ‬ᙇᏊぢ ࠊ஧ᐑ࿴ᙪ ࠊ໭࿴அ ࠊ㭯⏣἞㞝 ࠊ஬༑ᔒᗣே ࠊ⠛ཎཌ  䛆䜲䞁䝖䝻䝎䜽䝅䝵䞁䛇 ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤࡢ஦ᨾ࡟ࡼࡾ⎔ቃ୰࡟኱㔞࡟ᨺฟࡉࢀࡓᨺᑕᛶ᰾
✀ࡢ୰࡟ 140Ba ࡀ࠶ࡿࠋ஦ᨾᚋ࡟ከᩘ ᐃࡉࢀ࡚࠸ࡿ 137Cs ࡜␗࡞ࡾ 140Ba ࡣ㠀᥹Ⓨᛶࡢඖ⣲࡛࠶ࡾࠊ஦ᨾ≧ἣ࡟ࡼࡗ࡚ࡣ 137Cs ࡜ 140Ba ࡢᨺฟẚࡣ␗࡞ࡗ࡚ࡃࡿ࡜ᮇᚅࡉࢀࡿࠋࡲࡓࠊ㛗༙ῶᮇࡢș⥺ᨺฟ᰾✀࡛࠶ࡿ 90Sr ࡣ 140Ba ࡜ྠ᪘࡛࠶ࡾࠊ㏻ᖖࡢཎᏊ⅔㐠㌿᫬࡟୧᰾✀ࡣ⇞ᩱ୰࡛ఝࡓ໬Ꮫᣲືࢆ࡜ࡿࡇ࡜ࡀ▱ࡽࢀ࡚࠸ࡿࠋࡋ࠿ࡋࠊ㐣㓞஦ᨾ᫬࡛ࡣ 90Sr ࠾ࡼࡧ 140Ba ࡢ໬ྜ≀ࡣ㧗⇕࡟ࡼࡾศゎࡉࢀ㓟໬≀࡜࡞ࡾࠊBaO ࡣ SrO ࡟ẚ࡭࡚ࠊࡼࡾప࠸ ᗘ࡛⇞ᩱయ࠿ࡽẼ┦࡟ᨺฟࡉࢀࡿࡇ࡜ࡀ▱ࡽࢀ࡚࠸ࡿ[1]ࠋ௨ୖࡢࡇ࡜࠿ࡽࠊ140Baࠊ137Csࠊ90Sr ࡢᨺฟ㔞ࢆẚ㍑
ࡍࡿࡇ࡜࡛ࡼࡾヲ⣽࡞஦ᨾ≧ἣࡢ⌮ゎ࡟ࡘ࡞ࡀࡿ࡜⪃࠼ࡽࢀࡿࠋᮏ◊✲࡛ࡣ஦ᨾᚋ࡟ᮾ᪥ᮏ
࡛᥇ྲྀࡉࢀࡓ኱Ẽヨᩱ୰ࡢ 140Baࠊ137Cs ࠾ࡼࡧ 90Sr ࢆᐃ㔞ࡋࠊ᫬⣔ิ࡟୪࡭࡚ẚ㍑ࡍࡿࡇ࡜࡛
஦ᨾึᮇ࡟࠾ࡅࡿྛ᰾✀ࡢᨺฟᣲື࡜ࡑࡢ⤒᫬ኚ໬ࢆㄪ࡭ࡓࠋ
䛆ᐇ㦂䛇㻌本研究ではᮏ◊✲䛷䛿Ⲉᇛ┴᪥❧ᕷࠊỈᡞᕷࠊࡘࡃࡤᕷࠊ⚄ዉᕝ┴ᕝᓮᕷ࡛᥇ྲྀࡉࢀࡓ኱Ẽヨᩱ࡟ࡘ࠸࡚ศᯒࢆ⾜ࡗࡓࠋࡑࢀࡒࢀࡢᆅⅬ࡟࠾ࡅࡿヨᩱ᥇ྲྀ㛤ጞ᪥ࡣࠊࡘࡃࡤᕷ࠾ࡼࡧᕝᓮᕷࡀ ࠊ᪥❧ᕷࡀ ࠊỈᡞᕷࡀ  ࡛࠶ࡿࠋྛヨᩱࡣࣁ࢖࣮࣎ࣜࣗ
࣒࢚࢔ࢲࢫࢺࢧࣥࣉ࣮ࣛ࡟ࡼࡾ᥇ྲྀࡉࢀࠊ኱Ẽ྾ᘬ㔞ࡣ 㸫P ࡛࠶ࡗࡓࠋ
&V ࠾ࡼࡧ %D ࡢᐃ㔞ࡣ㧗⣧ᗘࢤ࣐ࣝࢽ࣒༙࢘ᑟయ᳨ฟჾ࡟ࡼࡿȚ⥺ ᐃ࡟ࡼࡾ⾜ࡗࡓࠋ&V ࡣ NH9 ࡢࣆ࣮ࢡࢆ⏝࠸࡚ࠊ%D ࡟㛵ࡋ࡚ࡣ NH9 ࡢȚ⥺ࣆ࣮ࢡࡀ &V ➼ࡢࢥࣥࣉࢺ
ࣥᩓ஘ࡢᐤ୚࡟ࡼࡾᐃ㔞ࡍࡿࡇ࡜ࡀ㞴ࡋ࠿ࡗࡓࡓࡵࠊፉ᰾✀ࡢ /D ࡢ NH9 ࡢȚ⥺࠿ࡽᐃ㔞ࡋࡓࠋ%D ࡢᨺᑕ⬟࡬ࡢ᥮⟬࡟ࡣ᥇ྲྀ᪥࡜ ᐃ᪥ࡢ㛫ࡢᨺᑕቯኚᖹ⾮ࢆ⪃៖ࡋࡓࠋࡉࡽ࡟
%D ࡢᨺᑕ⬟ࡀᐃ㔞ࡉࢀࡓ࠸ࡃࡘ࠿኱Ẽヨᩱ࡟ࡘ࠸࡚ࠊ6U ࡢᨺᑕ⬟ࢆ◚ቯศᯒ࡟ࡼࡾᐃ㔞ࡋࡓࠋලయⓗ࡞᪉ἲ࡜ࡋ࡚㓟࡟ࡼࡾ 6U ࢆᢳฟࡋࠊᅛ┦ᢳฟ๣ࡢ 6WURQWLXP5DG'LVN ࡜࢖࢜ࣥ஺᥮ศ㞳࡟ࡼࡾ 6U ࢆ༢㞳ࡋࡓࠋᚓࡽࢀࡓ 6U Ỉ⁐ᾮヨᩱࢆ㐃⥆ⓗ࡟ࢳ࢙ࣞࣥࢥࣇග ᐃࡋࠊፉ᰾✀ࡢ < ࡢᡂ㛗࡜ᨺᑕᖹ⾮฿㐩ࢆほᐹࡍࡿࡇ࡜࡛ࠊ6U ࡢᨺᑕ⬟ࢆồࡵࡓࠋᚓࡽࢀࡓ
ࡢᨺᑕ⬟ࡣࡍ࡭࡚  ࡟༙ῶᮇ⿵ṇࡋࡓࠋ㻌䛆⤖ᯝ䛇140Ba ࡜ 137Cs ࡢᨺᑕ⬟⃰ᗘẚࡢ⤒᫬ኚ໬ࢆᅗ 1 ࡟♧ࡍࠋ኱㔞ࡢᨺᑕᛶ᰾✀ࡢᨺฟࡀ㉳ࡁࡓ 2011/03/15 ࡟ࡘࡃࡤᕷ࠾ࡼࡧ
ᕝᓮᕷ࡛᥇ྲྀࡉࢀࡓ኱Ẽヨᩱࡢ 140Ba/137Cs
ࡣ࡯ࡰ୍⮴ࡋ࡚࠾ࡾ 0.07 ࡛࠶ࡗࡓࠋ4 ᭶௨㝆ࡢ኱Ẽヨᩱࡢ 140Ba/137Cs ࡣࠊࡼࡾ㧗࠸
0.15 ⛬ᗘ࡛࠶ࡗࡓࠋⓎ⾲࡛ࡣ 90Sr ࡜ࡢẚ㍑ࠊ
ཎᏊ⅔࢖ࣥ࣋ࣥࢺ࣮ࣜࢆ㋃ࡲ࠼ࡓࢳ࢙ࣝ
ࣀࣈ࢖ࣜཎᏊຊ஦ᨾ࡜ࡢẚ㍑ࠊ࡜࠸ࡗࡓࡼ
ࡾヲ⣽࡞㆟ㄽࢆ⾜࠺ࠋᅗ 1 140Ba/137Cs ᨺᑕ⬟ẚࡢ⤒᫬ኚ໬㻌㻌[1] J. Rest et al., Journal of Nuclear Materials 150, 2, 203–225. (1987)

Radioactive measurement of 140Ba in air-dust samples collected in the early phase of FDNPPZHANG, Z.,NINOMIYA, K., KITA, K., TSURUTA, H., IGARASHI,Y.,SHINOHARA,A.
Igarashi, Y., Shinohara, A.

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2A09⚟ᓥ➨୍ཎⓎ஦ᨾࡢึᮇẁ㝵࡛ᨺฟࡉࢀࡓ⌫≧ &V ⢏ᏊẼ㇟◊ ࠊᮾ⌮኱ ࠊ⟃Ἴ኱⎔ቃືែࢭࣥࢱ࣮ ‫ۑ‬஬༑ᔒᗣே ࠊ㊊❧ගྖ ࠊᲚ㔝⍞⋤ ࠊ㈈๓♸஧ ࠊ୰஭Ἠ ࠊ㜿㒊ၿஓ ࠊ㣤⃝ຬಙ ࠊబ⸨ᚿᙪ ࠊᮎᮌၨ௓ 

䛆⥴ゝ䛇⚟ᓥ➨୍ཎⓎ஦ᨾ࡛ࡣ኱㔞ࡢேᕤᨺᑕᛶ᰾✀ࡀᨺฟࡉࢀࡓࠋࡋ࠿ࡋ࡞ࡀࡽ㸪⌧᫬Ⅼ࡟⮳ࡿࡶࡑࡢ≀⌮࣭໬Ꮫᛶ≧࡟ࡘ࠸࡚ࡣᮍゎ᫂ࡢⅬࡀከ࠸ࠋ≉࡟኱Ẽ୰࡛࢚࢔ࣟࢰࣝែࢆ࡜ࡿ
ᨺᑕᛶ᰾✀࡟ࡘ࠸࡚ࡣ㸪⎔ቃືែࡸேయ࡬ࡢᙳ㡪ホ౯㸪ࡉࡽ࡟ࡣ㝖ᰁసᴗࡢᇶ♏࡜࡞ࡿ࡭ࡁ
᝟ሗ࡟ࡶ࠿࠿ࢃࡽࡎሗ࿌౛ࡣᩘᑡ࡞࠸ࠋࡑࡇ࡛ᡃࠎࡣ IP ࡸ㟁Ꮚ㢧ᚤ㙾➼ࢆ⏝࠸࡚㸪⚟ᓥ➨୍ཎⓎ஦ᨾ࡛ᨺฟࡉࢀࡓᨺᑕᛶ Cs ࡢ≀⌮࣭໬Ꮫᛶ≧ࢆㄪ࡭ࡓ㸦Adachi et al., 2013㸧ࠋᨺᑕᛶ᰾✀
ࡢᆅ⾲㠃ỿ╔ࡣࡑࡢᢸᣢ⢏Ꮚࡢ⢏ᚄ࡜྾‵≉ᛶ࡟ࡼࡾᨭ㓄ࡉࢀࡿࠋ᫂ࡽ࠿࡜࡞ࡗࡓᨺᑕᛶ Cs
ࡢ≀⌮࣭໬Ꮫᛶ≧ࢆ Kajino et al. (2012) ࡢࣔࢹࣝ࡟ᑟධࡋ㸪⢏ᚄ㸪྾‵≉ᛶࡢ㐪࠸࡛࡝ࡢࡼ࠺
࡟ᆅ⾲㠃࡬ࡢỿ╔ࡀኚ໬ࡋᚓࡿ࠿㸪ィ⟬ᶵᐇ㦂ࢆ⾜ࡗࡓ㸦Adachi et al., 2013㸧ࠋࡲࡓ㸪ᚓࡽࢀ
ࡓ Cs ⢏Ꮚࢆ኱ᆺᨺᑕග᪋タ SPring-8 ࡟࠾࠸࡚ȣࣅ࣮࣒ X ⥺࡟ࡼࡿ㠀◚ቯศᯒࢆ⾜࠸㸪ࡉࡽ࡟ヲ⣽࡟ࡑࡢ≀⌮࣭໬Ꮫᛶ≧ࢆ㏣ཬࡋࡓ㸦Abe et al., 2014㸧ࠋࡇ࠺ࡋࡓᨺᑕᛶ Cs ⢏ᏊࡣẼ㇟◊✲ᡤࡢヨᩱࡔࡅ࡛ࡣ࡞ࡃ㸪⟃Ἴ኱࡛ᚓࡓࣇ࢕ࣝࢱ࣮ヨᩱ࠿ࡽࡶぢ࠸ࡔࡉࢀࡓ㸦ᮎᮌ࡯࠿㸪2013㸧ࠋ䛆ᡭἲ䛇 HV ࢧࣥࣉ࣮ࣛ࡟ࡼࡾ▼ⱥࣇ࢕ࣝࢱ࣮㸦203mm254mm㸧ୖ࡟ 6 ᫬㛫㹼1 ᪥✚⟬࡛࢚࢔ࣟࢰࣝࢆᤕ㞟ࡋࡓࠋȚ⥺ࢫ࣌ࢡࢺࣝศᯒ࡟౪ࡍࡿ๓࡟࣏ࣥࢳ࡛ࡃࡾᢤࡁศྲྀヨᩱࢆᚓࡓࠋ
ࡇࢀࡽヨᩱࢆ࢖࣓࣮ࢪࣥࢢ࣭ࣉ࣮ࣞࢺ㸦IP㸧࡛ᨺᑕ⬟ࡢ஧ḟඖศᕸࢆㄪ࡭ࡓࠋIP ࡛㯮Ⅼࢆ୚࠼ࡿ⢏Ꮚࢆ㑅ูࡋ㸪࣮࢝࣎ࣥࢸ࣮ࣉ࡜ȣ࣐ࢽࣆ࣮ࣗࣞࢱ࣮ࢆ⏝࠸࡚ࣇ࢕ࣝࢱ࣮ヨᩱࢆ⣽ศ๭ࡋ㸪IP ࡢ㯮Ⅼࡲࡓࡣ Ge ༙ᑟయ᳨ฟჾ࡛ࡢȚ⥺ ᐃ࡛ᨺᑕᛶ Cs ࢆ㏣㊧ࡋ࡚㸪᭱⤊ⓗ࡟㉮ᰝᆺ㟁Ꮚ㢧ᚤ㙾࡛᧜ീ࡜࢚ࢿࣝࢠ࣮ศᩓᆺ㹖⥺ศᯒࢆ⾜࠸㸪ᨺᑕᛶ Cs ⢏Ꮚࡢ≉ᐃࢆ⾜ࡗࡓࠋᚓࡽ
ࢀࡓ Cs ⢏Ꮚࢆ SPring-8 ࡟࠾࠸࡚ࢩࣥࢡࣟࢺࣟࣥᨺᑕගȣࣅ࣮࣒ X ⥺ศᯒ࡟౪ࡋ㸪⢏Ꮚ୰ࡢඖ⣲ࡢ࣑ࢡࣟ࡞࣐ࢵࣆࣥࢢ㸪X ⥺྾཰➃㏆ഐᵓ㐀㸦XANES㸧ศᯒ࡟ࡼࡾ╔┠ඖ⣲ࡢ໬Ꮫ≧ែࢆ㸪ࡉࡽ࡟ X ⥺ᅇᢡ㸦XRD㸧ศᯒ࡟ࡼࡾ⢏Ꮚ⮬యࡢ⤖ᬗᛶࢆㄪ࡭ࡓࠋ
䛆⤖ᯝ䛸㆟ㄽ䛇ࡘࡃࡤᕷ࡟ 2011 ᖺ 3 ᭶ 14,15 ᪥࡟฿᮶ࡋࡓ᭱ึࡢᨺᑕᛶࣉ࣮࣒ࣝࢆᤊ࠼ࡓヨᩱࡢࡳ࠿ࡽ㹼ᩘ wm ࡢ⌫≧࡛ Fe, Zn, O ➼࡜ Cs ࢆྵࡴ⢏Ꮚࢆぢฟࡋࡓࠋ⟃Ἴ኱ࡢࣇ࢕ࣝࢱ࣮ヨᩱ࠿ࡽࡶྠᵝࡢ⢏Ꮚࢆ᳨ฟࡋࡓࠋ⌫≧ Cs ⢏Ꮚࡣᩘ Bq ࡢᨺᑕ⬟ࡋ࠿࡞࠸ࡀ㸪ẚᨺᑕ⬟ࡣᴟࡵ࡚㧗ࡃࢧࣈ TBq/g ࡟ཬࡪࠋCs ྠ఩యẚ㸦134/137㸧ࡣ࡯ࡰ 1 ࡜࡞ࡾ㸪⚟ᓥ➨୍ཎⓎ஦ᨾ㉳※࡛࠶
ࡿࡇ࡜ࢆ♧ࡍࠋヨ㦂ࡋࡓ࡜ࡇࢁ㸪୙⁐ᛶ࡛࠶ࡿࡇ࡜ࡀࢃ࠿ࡗࡓࠋ௨㝆㸪ࡇࡢ⢏Ꮚࢆ Cs ࣮࣎ࣝ࡜࿧⛠ࡍࡿࠋᨺᑕග XRF ศᯒ࡟ࡼࡾ㸪Cs ࣮࣎ࣝ࠿ࡽ Mo, Zr, Ba, Sn ࡞࡝ࡢඖ⣲ࡀ᳨ฟࡉࢀࡓࠋ
ࡇࢀࡽࡣ᰾ศ⿣⏕ᡂ≀㉳※࡜⪃࠼ࡽࢀࡿࠋࡉࡽ࡟ XANES ศᯒ࡛ Mo㸪Sn ࡞࡝ࡀ㧗㓟໬ᩘࢆ࡜ࡿࡇ࡜㸪XRD ศᯒ࡛ࡣ Cs ࣮࣎ࣝࡀ㠀ᬗ㉁࡛࠶ࡿࡇ࡜ࡀ♧ࡉࢀࡓ㸦Abe et al., 2014㸧ࠋ⁐ゎᛶヨ㦂ࢆࡉࡲࡊࡲ࡞⁐፹࡛ヨࡳࡓ࡜ࡇࢁ㸪࢔ࣝ࢝ࣜᛶࡢ⁐ᾮࡢࡳ࡛ Cs ࣮࣎ࣝࡣ⁐ゎࡋࡓ㸦ᮎᮌ࡯࠿㸪2013㸧ࠋ⇕⃰◪㓟࡟୙⁐ࡢࣇ࢕ࣝࢱ࣮ṧ´࠿ࡽࡶ Cs ࣮࣎ࣝࡀ᳨ฟࡉࢀࡓࠋ⌧≧ࡢ࢚࢔ࣟࢰࣝᩘ್ࣔࢹࣝ࡟‵ᛶ࠾ࡼࡧ஝ᛶỿ╔⋡㸪㞼≀⌮㐣⛬ࢆᕥྑࡍࡿ࡜⪃࠼ࡽࢀࡿ Cs ࣮࣎ࣝ⢏ᚄ࡞ࡽࡧ࡟㠀྾‵ᛶࢆᑟධࡍࡿࡇ࡜࡛㸪ࡑࡢ㍺㏦࣭ỿ╔ࡀᚑ᮶ࡢࢧࣝࣇ࢙࣮ࢺ௬ᐃ࡟ࡼࡿ
ィ⟬࡜࠿࡞ࡾ␗࡞ࡿࡇ࡜ࢆ☜࠿ࡵࡓࠋ௒ᚋࡢࡉࡽ࡞ࡿ◊✲ࡀᚲせ࡜⪃࠼ࡽࢀࡿࠋ
Physical and Chemical Characteristics of Radio-Cs Emitted during the Early Stage of the Fukushima
Nuclear Power Plant Accident
IGARASHI, Y., ADACHI, K., KAJINO, M., ZAIZEN, Y., NAKAI, I., ABE, Y., IIZAWA, Y., SATOU, Y.,
SUEKI, K..

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2A10!"#$%&'()*+,- ../0123.4567 89:;<=>?@ABC!
!"#$ %&'1()*+, 2-./012 1(3456 1(789 1(:;<= 1(! ! ! !
>?@$ 1(ABC 1(4D<E 2!

FGHI!JKLMNOPQRSTUVSW(JXYZ[\]^_`aEbcdefghi(
JXjOklmnofJXpfgq^rsOYtuOvlmw(deOxuyz{|}~mj]^2011 fZx_`OW(bcnfghi 110mAg/137Cs SOZ( ¡¢qbc£¤ 20 km ¥W¦§f¨nW 137Cs(134Cs ZA©ªf«¬ig¡(­®¡Z¯°ih^± n(²³m´µW¶·|¢i±m¸¹±º´µW»m^ 110mAg/137Cs S{¼b½{znf¾^¿(2013 nbcnfZ^OÀÁÂ{xi(¹Ob½yz{ÃÄ!
FÅÆ ÇÈI!Fig. 1(a) 137Cs «¬ÉZ 5 MBq/m2 {ÊË^ SOÌÍÎÏZÐÑm¡(ÒÓÔf 3 ÕOÖf×Ø110mAg/137Cs S{ 3 NÙfÚÛÜÝ¾^ (Fig. 1(a) 0.018!Þ
ÚÛÜÝ-{¼ÚÛÜÝWßàOÒáâÕbcn 20 km ¥fãä (Fig.
1(b))(Ppf 134Cs/137Cs SW 0.92 {¼bn(2012)få^ ORIGEN2 OæçÅÆ Sè¾^ (110mAg/137Cs S(134Cs/137Cs S áf 1 éêOÖ ëìEíEß(îOÚÛÜ
ÝO 134Cs/137Cs SWhïáð 1 »m¸ihFig. 1(b)bcnßàfño^AòóôÉõfghi(ö÷øfùúÚÛÜÝW 0.0049!ûÚÛÜÝ-{¼ih^Z(bc£¤W 0.0019!üÚÛÜÝ-OÚÛÜÝZôÉýþÝfm¸ih^ö÷øOôÉ~ÿZ!"OW 15 #]¡($%OJXÉWY&ªf'(¾^± n!(Pontillion
et al., 2010)(0.0049 OÚÛÜÝZ 15 #fJX)*+" v"^$ 0.0019 O«¬
WY&ªZ¹å¡,Din-.JX/j 01^¥~n(_`aEbc
nßà¨n(110mAg/137Cs SZ»m^23W(3 ÕO»m^JXt4få¡(¹
5Z6­i78¿ ÇËn^!

Fig. 1 (a) 110mAg/137Cs S 137Cs )+*+"ÜO9:(b) 110mAg/137Cs S)+*+"ÜO·;<

Cs

Classification of radioactive contamination according to 110mAg/137Cs ratios in the northwest area of
the Fukushima Daiichi NPPSATOU, Y., SUEKI, K., SASA, K., MATSUNAKA, T., SHIBAYAMA, N., TAHAHASHI T.,KINOSHITA, N..

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పᅽ䛾 H2+CO 䛚䜘䜃 H2+CO2 ΰྜ䜺䝇䛻䛚䛡䜛䝭䝳䜸䞁㌿⛣㐣⛬䛾◊✲

2A11㜰኱㝔⌮ ࠊཎᏊຊᶵᵓ ࠊ㧗࢚ࢿ◊ ࠊᅜ㝿ᇶ╩ᩍ኱  ‫⏣ྜྷۑ‬๛ ࠊ஧ᐑ࿴ᙪ ࠊ✄ᇉㄔ ࠊఀ⸨Ꮥ ࠊ㧨ᮏர ࠊ㛗཭ഔ ࠊࢫࢺࣛࢵࢧ࣮࣭ࣃࢺࣜࢵࢡ ࠊἙᮧᡂ⫕ ࠊୗᮧᾈ୍㑻 ࠊ୕Ꮿᗣ༤ ࠊ୕ᾆኴ୍ ࠊஂಖㅬဢ ࠊ⠛ཎཌ 䛆⥴ゝ䛇㻌 ㈇࣑ࣗ࢜ࣥࡣ㟁Ꮚࡢ⣙ 200 ಸࡢ㉁㔞ࡀ࠶ࡿ㈇ࡢ㟁Ⲵࢆᣢࡘ⢏Ꮚ࡛ࠊ㌶㐨㟁Ꮚ࡜ྠࡌࡃ
࣑ࣗ࢜ࣥᅛ᭷ࡢཎᏊ㌶㐨ࢆᙧᡂࡋࠊ࣑ࣗ࢜ࣥཎᏊࢆࡘࡃࡿࠋ㈇࣑ࣗ࢜ࣥࡀỈ⣲ཎᏊ࡟ᤕ⋓ࡉࢀࡓሙྜࠊ⏕ᡂࡍࡿ࣑ࣗ࢜ࣥỈ⣲ཎᏊࡣ᰾㟁Ⲵࡀ࢟ࣕࣥࢭࣝࡉࢀࡓ୰ᛶࡢ⢏Ꮚ࡜ࡋ࡚᣺ࡿ⯙࠸ࠊ㟁Ꮚ㞼࠿ࡽࡢ཯Ⓨࢆཷࡅࡎ࡟௚ࡢཎᏊࡢཎᏊ᰾㏆ഐࡲ࡛㏆࡙ࡃࡇ࡜ࡀ࡛ࡁࡿࠋࡑࡋ࡚ࠊ
࣑ࣗ࢜ࣥỈ⣲ཎᏊ࠿ࡽཎᏊ␒ྕࡢ኱ࡁ࠸ཎᏊࡀࡘࡃࡿࡼࡾ῝࠸࣑ࣗ࢜ࣥཎᏊ㌶㐨࡬࣑ࣗ࢜ࣥ
ࡀ⛣ືࡍࡿࠋࡇࡢ࣑ࣗ࢜ࣥỈ⣲ࢆ⤒࡚ᤕ⋓ࡉࢀࡿ㐣⛬ࡣࠊ࣑ࣗ࢜ࣥࡀཎᏊ࡟┤᥋ᤕ⋓ࡉࢀࡿ㐣⛬࡜ᤕ⋓㐣⛬ࡀ␗࡞ࡿࡇ࡜ࡀ㐣ཤࡢᐇ㦂࠿ࡽ♧၀ࡉࢀ࡚࠸ࡿࡀࠊཎᏊ࡟ࡼࡿ࣑ࣗ࢜ࣥࡢᤕ
⋓⋡ࡢ㐪࠸ࢆᐃ㔞ⓗ࡟㆟ㄽࡋࡓࡶࡢࡣᑡ࡞࠸ࠋ௒ᅇࡣࠊ࣑ࣗ࢜ࣥ㌿⛣㐣⛬ࢆヲ⣽࡟ㄪ࡭ࡿࡓ
ࡵ࡟ࠊⅣ⣲࡜㓟⣲࠿ࡽᡂࡿ༢⣧࡞ศᏊࠊCOࠊCO2 ࡟╔┠ࡋࡓࠋࡇࢀࡽ࡜Ỉ⣲࢞ࢫ࡜ࡢΰྜヨᩱ࡟ప࢚ࢿࣝࢠ࣮࣑ࣗ࢜ࣥࣅ࣮࣒ࢆ↷ᑕࡋࠊ࣑ࣗ࢜ࣥ㌿⛣ᚋࠊ࣑ࣗ࢜ࣥ⬺ບ㉳㐣⛬࡛Ⓨ⏕ࡍࡿ࣑ࣗ࢜ࣥ≉ᛶ X ⥺ࡢヲ⣽࡞ゎᯒࢆ⾜ࡗࡓࡢ࡛ሗ࿌ࡍࡿࠋ
䛆ᐇ㦂䛇 ᮏᐇ㦂ࡣⲈᇛ┴ᮾᾏᮧࡢ J-PARC ≀㉁⏕࿨⛉Ꮫᐇ㦂᪋タ࣑ࣗ࢜ࣥᐇ㦂᪋タ(MUSE)
D1 ࣅ࣮࣒ࣛ࢖࡛ࣥ⾜ࡗࡓࠋH2 ࢞ࢫ࡟ CO ࠾ࡼࡧࠊCO2 ࢆ 1%ࡢΰྜẚ࡛ΰࡐࡓ࢞ࢫࢆヨᩱ࡜ࡋࠊ࢞ࢫࢳ࢙ࣥࣂ࣮(ᐜ✚ 7.0 L)࡟పᅽ᮲௳(50 kPa, 99 kPa)࡛ᑒධᚋࠊ㈇࣑ࣗ࢜ࣥࢆ↷ᑕࡋࡓࠋ
ࡲࡓࠊCO ࡜ CO2 ࡟ࡼࡿ࣑ࣗ࢜ࣥࡢ┤᥋ᤕ⋓ࡶほ ࡍࡿࡓࡵࠊ⣧⢋࡞ CO(40 kPa)࡜ CO2(20 kPa)࡬ࡢ㈇࣑ࣗ࢜ࣥ↷ᑕࡶᐇ᪋ࡋࡓࠋ࣑ࣗ࢜ࣥ≉ᛶ X ⥺ࡣࢤ࣐ࣝࢽ࣒༙࢘ᑟయ᳨ฟჾࢆ⏝࠸࡚ᐃࡋࠊࡑࢀࡒࢀࡢࢧࣥࣉࣝ࡟ࡘࡁ 9㹼16 ᫬㛫 ᐃࢆ⾜ࡗࡓࠋ䛆⤖ᯝ䛸⪃ᐹ䛇 CO ࡢ C ཎᏊ࡟ᤕ⋓ࡉࢀࡓ࣑ࣗ࢜
ࣥࡀᨺฟࡍࡿ Lyman ⣔ิࡢ࣑ࣗ࢜ࣥ≉ᛶ X ⥺ࢆ
KαX ⥺࡛つ᱁໬ࡋࡓᙉᗘ࡜ࡋ࡚ᅗ.1 ࡟♧ࡍࠋ┤᥋ᤕ⋓ㄢ⛬ࡣ࣑ࣗ࢜ࣥࡀ┤᥋ CO ࡢ C ཎᏊ࡟ᤕ⋓ࡉࢀࡓ᫬ࡢࠊ㌿⛣㐣⛬ࡣ࣑ࣗ࢜ࣥỈ⣲࠿ࡽ C
ཎᏊ࡬ࡢ㌿⛣࡟ࡼࡾᤕ⋓ࡉࢀࡓ᫬࡟Ⓨࡍࡿ X ⥺࡛࠶ࡿࠋࡇࢀࡽࢆẚ㍑ࡍࡿ࡜ࠊKβ ௨ୖࡢ㧗㑄⛣X ⥺ࡢᙉᗘࡀ␗࡞ࡿࡇ࡜ࡀࢃ࠿ࡗࡓࠋࡇࢀࡣࠊ
࣑ࣗ࢜ࣥࡀᤕ⋓ࡉࢀࡓึᮇࡢ㔞Ꮚ≧ែࡀ␗࡞ࡿ
ࡇ࡜ࢆ⾲ࡋ࡚࠾ࡾࠊCO ࡬ࡢ┤᥋ᤕ⋓࡜ࠊ㌿⛣࡟ࡼࡿᤕ⋓ࡢᤕ⋓ࣉࣟࢭࢫࡢ㐪࠸ࢆ♧ࡋ࡚࠸ࡿࠋ
ㅮ₇࡛ࡣࠊࡇࡢ⤖ᯝ࡟ࡘ࠸࡚ᐃ㔞ⓗ࡞㆟ㄽࢆࡍࡿ࡜࡜ࡶ࡟ࠊ࣑ࣗ࢜ࣥࡀ㌿⛣ࡍࡿཎᏊ࿘ᅖࡢ໬ ᅗ㻚㻝㻌㻯㻻 䛾 㻯 ཎᏊ䛻ᤕ⋓䛥䜜䛯䝭䝳䜸䞁䛜Ⓨ䛩䜛䝭䝳䜸Ꮫⓗ⎔ቃࡢᙳ㡪ࢆࠊCO ࡜ CO2 ࡛ẚ㍑ࡋࠊC ཎᏊ 䞁≉ᛶ 㼄 ⥺䛾ᨺฟ䝟䝍䞊䞁䚹㻔㻞㻙㻝㻕䛿䝭䝳䜸䞁䛜୺㔞Ꮚ࡜ O ཎᏊࡢ࣑ࣗ࢜ࣥࡢᤕ⋓⋡ࡢ㐪࠸࡜ࡋ࡚㆟ㄽ ᩘ 㼚㻩㻞 䛛䜙 㻝 䜈㑄⛣䛩䜛᫬䛻Ⓨ⏕䛩䜛 㼄 ⥺㻔㻷α ⥺㻕䜢ព
࿡䛩䜛䚹㻌
ࡍࡿࠋ
Muon transfer process for H2+CO and H2+CO2 mixtures in low pressure gaseous conditions
YOSHIDA, G., NINOMIYA, K., INAGAKI, M., ITO, T.U., HIGEMOTO, W., NAGATOMO, T.,
STRASSER, P., KAWAMURA, N., SHIMOMURA, K., MIYAKE, Y., MIURA, T., KUBO, M.K.,
SHINOHARA, A.

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2A12Ẽయ࣋ࣥࢮࣥ࠾ࡼࡧࢩࢡࣟ࣊࢟ࢧࣥ࡟ᑐࡍࡿ࣑ࣗ࢜ࣥỈ⣲ཎᏊ࠿ࡽࡢ
࣑ࣗ࢜ࣥ㌿⛣㐣⛬㜰኱㝔⌮ ࠊᅜ㝿ᇶ╩ᩍ኱ ࠊJAEAࠊKEK ‫✄ۑ‬ᇉㄔ ࠊྜྷ⏣๛ ࠊ஧ᐑ࿴ᙪ ࠊஂಖㅬဢ ࠊ㧨ᮏர ࠊἙᮧᡂ⫕ ࠊ୕Ꮿᗣ༤ ࠊ୕ᾆኴ୍ ࠊ⠛ཎཌ 䛆⥴ゝ䛇㻌 ㈇࣑ࣗ࢜ࣥࡀ≀㉁୰࡛೵Ṇࡍࡿ࡜ࠊࡑࢀࡀ≀㉁୰ࡢཎᏊࡢᣢࡘ㟁Ꮚ࡜⨨ࡁ᥮ࢃࡾࠊ࣑
ࣗ࢜ࣥཎᏊ࡜࿧ࡤࢀࡿ⣔ࡀ⏕ᡂࡍࡿࠋ࣑ࣗ࢜ࣥࡀỈ⣲ཎᏊ࡟ᤕ⋓ࡉࢀࡿ࡜࣑ࣗ࢜ࣥỈ⣲ཎᏊࡀ⏕ᡂࡍࡿࠋ࣑ࣗ࢜ࣥࡣ㉁㔞ࡀ኱ࡁࡃࡑࡢ㌶㐨ࡀཎᏊ᰾࡟㠀ᖖ࡟㏆ࡃ࡞ࡿࡓࡵࠊ࣑ࣗ࢜ࣥỈ⣲ཎᏊࡣᨃఝⓗ࡟୰ᛶ⢏Ꮚ࡜ࡋ࡚≀㉁୰ࢆᣑᩓࡋࠊ௚ࡢཎᏊ᰾ࡢ㏆ࡃࡲ࡛᥋㏆ࡋ࡚࣑ࣗ࢜ࣥࢆ㌿⛣ࡉࡏࡿ≉␗࡞ࡩࡿࡲ࠸ࢆࡍࡿࠋࡇࢀࢆ࣑ࣗ࢜ࣥ㌿⛣㐣⛬࡜࠸࠺ࠋ㈇ࣃ࢖࢜ࣥ࡟ࡼࡾ⏕ᡂࡍࡿࣃ࢖࢜ࣥỈ⣲ཎᏊ࡛ࡶྠᵝࡢ⌧㇟ࡀ㉳ࡇࡾࠊࡇࢀࢆࣃ࢖࢜ࣥ㌿⛣㐣⛬࡜࠸࠺ࠋ ࣑ࣗ࢜ࣥཎᏊࡸࣃ࢖࢜ࣥཎᏊࡢᙧᡂ㐣⛬࡛ࡣࠊ࣑ࣗ࢜ࣥࡸࣃ࢖࢜ࣥࢆᤕ⋓ࡍࡿཎᏊࡢ໬Ꮫ
ⓗ≧ែࡀᙳ㡪ࡍࡿ໬Ꮫຠᯝࡀ▱ࡽࢀ࡚࠸ࡿ [1]ࠋࣃ࢖࢜ࣥ㌿⛣㐣⛬࡟ࡼࡿࣃ࢖࢜ࣥཎᏊࡢᙧᡂ
࡛ࡶ໬Ꮫຠᯝࡀሗ࿌ࡉࢀ࡚࠸ࡿࡀ [2]ࠊ࣑ࣗ࢜ࣥ㌿⛣㐣⛬࡟࠾ࡅࡿ໬Ꮫຠᯝࡣ࠸ࡲࡔሗ࿌ࡉࢀ
࡚࠸࡞࠸ࠋᮏ◊✲࡛ࡣࠊࣃ࢖࢜ࣥ㌿⛣㐣⛬࡟࠾࠸࡚໬Ꮫຠᯝࡀሗ࿌ࡉࢀ࡚࠸ࡿ࣋ࣥࢮࣥ(C6H6)
࠾ࡼࡧࢩࢡࣟ࣊࢟ࢧࣥ(C6H12)࡟╔┠ࡋࠊ࣑ࣗ࢜ࣥ㌿⛣㐣⛬࡟࠾ࡅࡿ໬Ꮫຠᯝࡢ᳨ウࢆ⾜ࡗࡓࠋ䛆ᐇ㦂䛇 C6H6 ࠾ࡼࡧ C6H12 ࢆẼయ࡜ࡋ࡚⏝࠸ࠊC6H6 or C6H12 (0.2kPa) + Ne (3.0kPa) + H2
(96.8kPa)ࡢΰྜẼయࢆࢧࣥࣉࣝ࡜ࡋ࡚ㄪ〇ࡋࡓࠋ㌿⛣㐣⛬࡟ࡼࡿ࣑ࣗ࢜ࣥཎᏊᙧᡂࡀ୺࡜࡞
ࡿࡼ࠺ࠊỈ⣲ࡢΰྜẚࢆ㧗ࡃࡋࡓࠋࡲࡓࠊࢿ࢜ࣥࡣྛࢧࣥࣉࣝ࡟࠾ࡅࡿ㌿⛣㏿ᗘࡢᇶ‽࡜ࡋ࡚⏝࠸ࡓࠋࡇࢀࡽࡢࢧࣥࣉࣝ࡟ᑐࡋࠊ኱ᙉᗘ㝧Ꮚຍ㏿ჾ᪋タ(J-PARC)ࡢ MLF MUSE D1 ࣏࣮ࢺ࠾࠸࡚࣑ࣗ࢜ࣥ↷ᑕᐇ㦂ࢆ⾜࠸ࠊ࣑ࣗ࢜ࣥཎᏊࡀᙧᡂࡉࢀࡓࡢࡕࠊ࣑ࣗ࢜ࣥࡢ⬺ບ㉳࡟కࡗ࡚ᨺฟࡉࢀࡿ࣑ࣗ࢜ࣥ≉ᛶ X ⥺ࢆ Ge ༙ᑟయ᳨ฟჾ࡛ ᐃࡋࡓࠋ䛆⤖ᯝ䛸⪃ᐹ䛇 ᚓࡽࢀࡓ࣑ࣗ࢜ࣥ≉ᛶ X ⥺ࡢ᫬㛫ࢫ࣌ࢡࢺࣝ࠿ࡽࠊ࣑ࣗ࢜ࣥࣃࣝࢫ࡟ྠᮇࡋࡓ
ᡂศ(prompt)࡜ࠊprompt ࡟⥆࠸࡚ほ ࡉࢀࡿᡂศ(delayed)ࡢ 2 ࡘࢆᢳฟࡋࡓࠋdelayed ࡣࠊࡲࡎ࣑ࣗ࢜ࣥỈ⣲ཎᏊࡀᙧᡂࡋࠊ࣑ࣗ࢜ࣥ㌿⛣㐣⛬࡟ࡼࡾ࣑ࣗ࢜ࣥཎᏊࡀᙧᡂࡋࡓ࡜ࡁ࡟ᨺฟ
ࡉࢀࡿ࣑ࣗ࢜ࣥ≉ᛶ X ⥺࡛࠶ࡿࠋࡋࡓࡀࡗ࡚ࠊdelayed ࢫ࣌ࢡࢺࣝ࡟࠾ࡅࡿⅣ⣲࡜ࢿ࢜ࣥࡢ࣑
ࣗ࢜ࣥ≉ᛶ X ⥺ࡢᙉᗘẚࡣࠊⅣ⣲ཎᏊ࡜ࢿ࢜ࣥཎᏊ࡬ࡢ࣑ࣗ࢜ࣥ㌿⛣㏿ᗘࡢẚ࡜࡞ࡿࠋⅣ⣲
ࡢࣛ࢖࣐ࣥ⣔ิ࡜ࢿ࢜ࣥࡢࣂ࣐࣮ࣝ⣔ิࡢ X ⥺࠿ࡽࡢࡇࡢẚࢆồࡵࡓ࡜ࡇࢁࠊC6H6+Ne+H2
ࢧࣥࣉ࡛ࣝ μC/μNe = 6.4±0.7ࠊC6H12+Ne+H2 ࢧࣥࣉ࡛ࣝ μC/μNe = 5.7±0.5 ࡜࡞ࡗࡓࠋᮏᐇ㦂ࡢᐃ⢭ᗘࡢ⠊ᅖ࡛ࡣࠊᮏᐇ㦂⣔࡟࠾࠸࡚࣑ࣗ࢜ࣥ㌿⛣㏿ᗘࡢᕪࡣ᭷ព࡛ࡣ࡞࠿ࡗࡓࠋ ࣃ࢖࢜ࣥ㌿⛣㐣⛬࡟࠾࠸࡚ࡣࠊC6H6 ࡲࡓࡣ C6H12 ࡟ᅄሷ໬Ⅳ⣲ࢆΰྜࡋࡓᾮయ࡟࠾࠸࡚ࠊ
C6H6 ࡢⅣ⣲࡟ᑐࡍࡿࣃ࢖࢜ࣥ㌿⛣㏿ᗘࡀ C6H12 ࡢⅣ⣲࡟ᑐࡍࡿ㌿⛣㏿ᗘࡢ 2 ಸ࡛࠶ࡿ࡜ሗ࿌
ࡉࢀ࡚࠸ࡿ[2]ࠋࡲࡓࠊᮏᐇ㦂࡟ඛ❧ࡗ࡚⾜ࡗࡓࠊࣃ࢖࢜ࣥᐇ㦂࡜ྠࡌᾮయ⣔࡟࠾ࡅࡿ࣑ࣗ࢜
ࣥ↷ᑕᐇ㦂࡟࠾࠸࡚ࡣࠊࣃ࢖࢜ࣥᐇ㦂࡜ྠࡌഴྥࡢ໬Ꮫຠᯝࡀ♧၀ࡉࢀࡿ⤖ᯝࡀᚓࡽࢀࡓ[3]ࠋ
ᾮయࡢ⣔࡟࠾࠸࡚ࡣᐦᗘࡀ㧗ࡃ࣑ࣗ࢜ࣥ㌿⛣㏿ᗘࡀ኱ࡁࡃ࡞ࡾࠊບ㉳≧ែࡢ࣑ࣗ࢜ࣥỈ⣲ࡀ㌿⛣㏿ᗘ࡟ᙳ㡪ࢆ୚࠼࡚໬Ꮫຠᯝࡀほ ࡉࢀࡓ୍᪉ࠊ௒ᅇࡢẼయࡢ⣔࡟࠾࠸࡚ࡣᇶᗏ≧ែࡲ࡛⬺ບ㉳ࡋࡓ࣑ࣗ࢜ࣥỈ⣲࠿ࡽࡢ㌿⛣ࡀ୺࡜࡞ࡾࠊᮏᐇ㦂ࡢ⢭ᗘ࡛ほ ࡛ࡁࡿ໬Ꮫຠᯝࡀ⌧ࢀ࡞࠿ࡗࡓ࡜⪃࠼ࡽࢀࡿࠋ
[1] J. D. Knight et al., Phys. Rev. A 13, 43 (1976).

[2] A. Shinohara et al., Hyperfine Interact. 106, 301 (1997).

[3] M. Inagaki et al., APSORC’13, Kanazawa, Japan, 24-NCP-05 (2013).

Muon transfer process from muonic hydrogen in gaseous benzene and cyclohexane
INAGAKI, M., YOSHIDA, G., NINOMIYA, K., KUBO, M. K., HIGEMOTO, W., KAWAMURA, N.,
MIYAKE, Y., MIURA, T., SHINOHARA, A.

- 70 -

2A1
13

ȣ655 ἲ࡜࣓ࢫ
ࢫࣂ࢘࢔࣮ศศගἲ࡟ࡼࡼࡿΰྜྜཎᏊ౯࢝ࣝ࣎ࣥ㓟㕲㕲୕᰾㘒యࡢཎᏊ౯㐶
㐶ືࡢ㏣㊧
㊧
኱ྠ
ྠ኱ ࠊ㧗࢚ࢿ◊ -3$5& ࠊᅜ㝿ᇶ╩╩ᩍ኱ ࠊᮾࣞࣜࢧ࣮ࢳࢭ
ࢭࣥࢱ࣮ࠊᮾ
ᮾ㑥኱  㓇஭஭㝧୍ ࠊᖾ⏣❶ᏹ ࠊ‫ۑ‬‫ஂۑ‬ಖㅬဢ ࠊ୕Ꮿᗣ༤༤ ࠊ୰ᮏᛅᛅᏹ ࠊᑿ୰୰ド ࠊ
ᑠᮌᮌ᭮஢ ࠊ㧗㧗ᶫṇ ࠊ㧗㧗ᒣດ 
㻌ΰྜཎᏊ౯࢝
࢝ࣝ࣎ࣥ㓟㕲㕲୕᰾ )H)HH)H 㘒యయ㸦)H2 5&22 /ࠊྑᅗ㸧ࡣࡣࠊ䛆⥴ゝ䛇 ΰ
ศᏊࡢ୰୰ኸ㒊࡟࡯ࡰṇ୕ゅᙧࡢ㓄㓄⨨ࢆ࡜ࡿ㸱 ࡘࡢ㕲࢖࢜ࣥࢆྵࡴࠋ)H ࣓ࢫࣂ࢘ ࢔࣮ศගἲἲ࡛ཎᏊ౯ᦂືࢆㄪ࡭࡚ࡁࡁࡓࡀ  ࠊṇṇ࣑ࣗ࢜ࣥࢫࣆ࡛ࣥཎᏊ౯
౯ᦂືࢆࣉࣟ ࣮ࣈࡍ࡭ࡃࡃ ȣ65 ᐇ㦂ࢆ⾜ࡗࡓࠋ௒௒ᅇࡣࠊ࢝ࣝ
ࣝ࣎ࣥ㓟࡜ࡋ࡚
࡚㓑㓟ࠊ࣌ࣥ
ࣥࢱࣇࣝ࢜ࣟ Ᏻ)H2 &+&&22  +2 ·+2ࠊ)H2 &)&22  &+ 1 ·&+&O ࠊ ໬Ꮫᘧࡢ᭱ᚋᑿࡢ
ࡢ +2 ࡜ &+&O&  ࡣ⤖ᬗ⁐፹፹ศᏊ࡛࠶ࡿ
ࡿࠋ䛆ᐇ㦂䛇ヨヨᩱ㘒యࡣ᪤᪤ሗ 㸧ࡢ᪉ἲἲ࡛ྜᡂࡋࡓ
ࡓࠋ࣓ࢫࣂ࢘࢔࣮ࢫ࣌
ࢡࢺࣝࡣ
ࡣ㏻ᖖࡢ᪉ἲ࡛ 㹼. ࡛ ᐃࡋࡓࠋ
ࠋȣ65 ᐇ㦂ࡣࡣ -3$5&0/) ࡢ 0886(' ࢚ࣜ࢔࢔ࡢṇ࣑ࣗ࢜
࢜ࣥࣅ࣮࣒࡜ ȣ65

ᐃ⿦⨨
⨨ࢆ౑࠸ࠊ

ࢮࣟ☢ሙ
ሙࠊᶓ☢ሙࠊ⦪☢ሙ 㹼* ୗࠊ㹼. ࡛⾜ࡗࡓࠋ࡛Relative intensity /a.u.

ᜥ㤶㓟࡛࠶ࡿࠊḟࡢ㸰㘒యࡢከ⤖ᬗࢆ ◊✲ᑐ㇟࡜ࡋࡓࠋ

-1

300 K

77 (1
18) (!s)260 K

36 (3)( (!s)

230 K

27 (1
1) (!s)

200 K

19 (1
1) (!s)78 K

8.8 (33) (!s)

-1

-1

-1

-1

࠙⤖ᯝ࡜
࡜⪃ᐹࠚ)H2 &+&22  +2 y+2 ࡢ࣓࣓ࢫࣂ࢘࢔࣮࣮ࢫ࣌ࢡࢺ-5ᶓ☢ሙ *ࣝࠊ࣑ࣗࣗ࢜ࣥࢫࣆࣥᶓ* ᅇ㌿᫬㛫ࢫࢫ࣌ࢡࢺࣝࡢ ᗘ౫ᅗ 1.

Ꮡᛶࢆࠊࡑࢀࡒࢀࠊᅗ ࠊ㸰࡟♧♧ࡍࠋᅗ㸯࡟࡟࠾࠸࡚ࠊ.. ࡛ࡣ )H࡜ )H㸩ࡢ༊ู 㸦ཎᏊ౯ࢺࣛ
ࣛࢵࣉ㸧
ࡀ኱ࡁࡃ
ࡃṧᏑࡋ࡚

0

࢘࢔࣮ࢫ࣌ࢡࢺࣝ
࢘
ࣝࡢ
ࡣࠊ
ࡣ

5

Dop
ppler velocity /mmm/s
Fe3O(CH33COO)6(H2O)3·2
2H2O ࡢ࣓ࢫࣂ
ᗘ౫Ꮡᛶ 㸦ᅗ୰ࡢᩘ್

ᗘ࡜㟁Ꮚࡢࡢ࣍ࢵࣆࣥࢢ㏿ᗘ㸧ᐃࡉࢀ࡚࠸ࡿࡿࠋ ᗘࡢୖ
ୖ᪼࡟ࡼࡾཎᏊ
Ꮚ౯ࢹࢺࣛࢵࣉࣉ㸦ᖹᆒ໬㸧ᆺ࡜࡞ࡾࠊ
. ࡛ࡣ )Hࡢ࡯ࡰ༢୍
୍ᡂศ࡜࡞

-1

300 K

0
0.063
(6) (!s)

240 K

0
0.074
(6) (!s)

170 K

0
0.133
(11) (!s)

100 K

0..089 (10) (!s)ࡗࡓࠋᅗᅗ୰ࡢࣇ࢕ࢵࢸ࢕ࣥࢢࣛ࢖
࢖ࣥࡣ㟁Ꮚ࣍
࣍ࢵࣆࣥࢢࣔࢹ
ࢹࣝ࡟ࡋࡓ࣑ࣗ࢜࢜ࣥࢫࣆࣥᅇ㌿ࢫ࣌ࢡࢺࣝ
ࣝ㸦ᅗ 㸧࡟࡟࠾࠸࡚ࠊ⦪㍈㍈㸦㸻$V\㸧ࡢࢥࢧ࢖࢖ࣥ᣺ືࡢ᣺ᖜࡢ᫬㛫ኚ໬໬ࡀ࣑ࣗ࢜ࣥ
ࣥࢫࣆࣥ೫ᴟࡢ
ࡢῶᑡ㏿ᗘ

Asy /a.u.

ࡀࡗࡓࡶࡶࡢ࡛ࠊᕥഃࡢᩘ್ࡣồࡵࡵࡽࢀࡓ࣍ࢵ
ࢵࣆࣥࢢ㏿ᗘ࡛
࡛࠶ࡿࠋ

-1

-1

㸦࣑ࣗ࢜
࢜ࣥࢫࣆࣥ⦆࿴㏿ᗘ㸧࡟࠶࠶ࡓࡿ 㸧ࠋ⦆
⦆࿴㏿ᗘࡣ . ࡀ᭱኱
࡜࡞ࡗ࡚࡚࠸ࡿࠋࡇࡢ ᗘ௜㏆࡟࣑࣑ࣗ࢜ࣥࢫࣆ
ࣆࣥ೫ᴟ࡟ᙳ㡪
㡪ࢆ࠶ࡓ࠼

-1

ࡿ㘒యࡢ
ࡢ㟁Ꮚⓗᦂࡽࡂࡀ࠶ࡿࡇ࡜
࡜ࢆ♧၀ࡋ࡚
࡚࠸ࡿࠋྠᵝࡢࡢ࣓ࢫࣂ࢘࢔࣮㸭ȣ
ȣ65 ⤖ᯝࡣࠊ)H2 &)&22
2  &+1 y&&+&O ࡛ࡶᚓࡽࢀࡓࠋ
ྠ୍ࡢࡢΰྜཎᏊ౯㘒㘒యࡢཎᏊ౯
౯ᦂືࢆ㸰ࡘ
ࡘࡢᡭἲ࡛ほ ࡋࠊ୧

010Time / !s
s

20

⪅ࡢ

ᐃ
ᐃཎ⌮ࡢ㢮ఝⅬ࣭┦㐪Ⅼ࡟࡟ὀ┠ࡋ࡚⪃⪃ᐹࢆ⾜࠺ࠋ

<6DNDLHWDOO+\SHUILQH
H,QWHUDFWLRQQV  㸹ࢫ࣌ࢡࢺࣝࡢ ᗘ౫Ꮡᛶ 㸦ᅗᅗࣥࢫࣆࣥᅇ㌿ࢫ
62QDNDHWDOO'DOWRQ7UD
DQVDFWLRQV  
୰ࡢᩘ್ࡣࠊ ᗘ࡜࣑ࣗ࢜ࣥࢫࣆࣥ⦆࿴㏿ᗘᗘ㸧
76DWRHWDO-$P&KHP
P6RF  
.1DJDPLQH͆
͆,QWURGXFWRU\\0XRQ6FLHQFFH͇&DPEULGGJH8QLY3UH
HVV  




ᅗ 2.

Fe3O(C
CH3COO)6(H2O)3·2H2O ࡢ࣑ࣗ࢜࢜Researchh of Fluctuaating Valencee-state in M ixed-valencee Trinuclear Iron Carboxxylate Compplexes byMuon Sppin Relaxatioon and Mösssbauer Spectrroscopy
SAKAI, Y., KOD
DA, A., KU
UBO, M. K
K., MIYAKKE, Y., NA
AKAMOTOO, T., ONA
AKA, S.,
OGISO, R., TAKAAHASHI, M., TAKAYAAMA, T.

- 71 -

2B01࣐࢖ࢡࣟἼࢆ฼⏝ࡋࡓ⎔ቃヨᩱ୰ࢺࣜࢳ࣒࢘ࡢศᯒ๓ฎ⌮ᡭἲ࡟㛵ࡍࡿᇶ♏᳨ウ
᰾⼥ྜ◊ ࠊ஑⎔ቃ ࠊ⎔ቃ⛉ᢏ◊ ࠊ⏘⥲◊  ‫ۑ‬㉥⏣ᑦྐ ࠊ㧗ᒣᐃḟ ࠊ⏣୰ᑗ⿱ ࠊ⋢฼ಇဢ ࠊᰠෆ⚽ᶞ ࠊబ㔝୕㑻 䛆⥴ゝ䛇㻌 Ỉ⣲ࡢᨺᑕᛶྠ఩య࡛࠶ࡿࢺࣜࢳ࣒࢘ࡣࠊ⎔ቃヨᩱ୰࡟ࠕ⤌⧊⮬⏤Ỉࢺࣜࢳ࣒࢘ࠖ
㸦FWT: Free Water Tritium㸧࠾ࡼࡧࠕ᭷ᶵ⤖ྜᆺࢺࣜࢳ࣒࢘ࠖ
㸦OBT: Organically Bound Tritium㸧࡜ࡋ࡚Ꮡᅾࡋ࡚࠸ࡿࠋ
FWT ࡜ OBT ࢆᐃ㔞ࡍࡿⅭ࡟ࡣỈ࡜ࡋ࡚ᅇ཰ࡍࡿࡢࡀ୍⯡ⓗ࡛࠶ࡿࡀࠊ
෾⤖஝⇱ἲ࡟ࡼࡿỈศᅇ཰ࠊ஝⇱᭷ᶵ≀ࡢ⇞↝࡟ࡼࡿỈศᅇ཰➼ࠊỈ⣲ࢆỈ࡜ࡋ࡚ᅇ཰ࡍࡿ
Ⅽࡢ๓ฎ⌮࡟᫬㛫ࢆせࡍࡿࠋ㏆ᖺࠊᛴ㏿࡟ᬑཬࡋ࡚ࡁࡓ࣐࢖ࢡࣟἼຍ⇕࡟ࡼࡿ஝⇱ཬࡧ⅊໬ᢏ⾡ࢆࢺࣜࢳ࣒࢘ศᯒࡢ๓ฎ⌮࡟㐺⏝ࡍࡿࡇ࡜࡛ࠊ᭷ᶵ≀ฎ⌮-Ỉศᤕ㞟ࢩࢫࢸ࣒ࡢ㎿㏿໬㺃ຠ⋡໬ࡀᮇᚅ࡛ࡁࡿࠋᯇⴥࡣ඲ᅜྛᆅ࡟⮬⏕ࡋ࡚࠾ࡾࠊ⎔ቃởᰁࢆ┘どࡍࡿࡓࡵࡢᣦᶆ᳜≀࡜ࡋ࡚ᩘከࡃࡢࣔࢽࢱࣜࣥࢢ⤖ᯝࡀሗ࿌ࡉࢀ࡚࠸ࡿࠋᮏⓎ⾲࡛ࡣࠊᯇⴥヨᩱࢆᑐ㇟࡟ࢺࣜࢳ
࣒࢘ศᯒࡢⅭࡢ࣐࢖ࢡࣟἼࢆ⏝࠸ࡓỈศᅇ཰ࢩࢫࢸ࣒ࡢᇶ♏᳨ウࢆ⾜ࡗࡓ⤖ᯝ࡟ࡘ࠸࡚ሗ࿌
ࡍࡿࠋ䛆ᐇ㦂䛇 ᮏ◊✲࡛ࡣࠊᯇⴥヨᩱࢆ࣐࢖ࢡࣟἼຍ⇕ࡋࡓ㝿ࡢ ᗘኚ໬࠾ࡼࡧ໬Ꮫኚ໬ࡢ㐍⾜࡟క࠺≀⌮ⓗ࡞ኚ໬㸦㔜㔞ኚ໬㸪⇕ኚ໬㸧ࢆ᫂ࡽ࠿࡟ࡍࡿࡇ࡜ࢆ┠ⓗ࡟ࠊ⇕ศᯒࢩࢫࢸ࣒ࢆ⏝࠸࡚⇕㔜㔞㸦TG㸧㺃♧ᕪ⇕ศᯒ㸦DTA㸧ࢆ⾜ࡗࡓࠋ◊✲ᡤᩜᆅෆ࡛᥇ྲྀࡋࡓᯇⴥࡣࠊ2mm ⛬ᗘ࡟⿢᩿ࡋࠊ⣙ 30mg ࢆⓑ㔠ࣃࣥ࡟ࢭࢵࢺࡋࠊN2㸦100cc/min㸧ࠊAir ࠾ࡼࡧ O2㸦100cc/min㸧Ẽὶୗ࡟࠾࠸࡚ࠊTG㺃DTA ᐃࢩࢫࢸ࣒㸦EXSTAR6000, Seiko Instruments Inc.㸧ࢆ⏝࠸࡚ศᯒࡋࡓࠋ

7* '7$ μ9䛆⤖ᯝ䛸⪃ᐹ䛇 ᅗ࡟ N2 ࢞ࢫ 100cc/min Ẽὶୗࠊ5Υ/min ࡢ᮲௳࡛᪼ ࡋࡓ㝿ࡢᯇⴥヨᩱࡢ TG
࠾ࡼࡧ DTA ࡢ᫬㛫⤒㐣ࢆ♧ࡍࠋTG ࡣ᪼ 㛤ጞ࠿ࡽ⣙ 110Υࡲ࡛ࡢ㛫࡛ᛴ⃭࡟ῶᑡࡍࡿഴྥ
ࡀㄆࡵࡽࢀࡓࠋࡇࡢ᫬ࠊDTA ࡶపୗࡋࠊTG ᭤⥺ࡀࣇࣛࢵࢺ࡟࡞ࡿ㸦⣙ 110Υ㸧ࡢ࡜ྠ᫬࡟ᐃ
ᖖ≧ែ࡟ᡠࡗࡓࠋTG ࡜ DTA ࡀྠ᫬࡟పୗࡍࡿഴྥࡣヨᩱ࠿ࡽࡢ⤌⧊⮬⏤Ỉ⬺Ỉ཯ᛂ࡛࠶ࡿ
࡜⪃࠼ࡽࢀࠊ௒ᅇࡢ⤖ᯝ࠿ࡽᯇⴥヨᩱࡢ⬺Ỉ཯ᛂࡣ࠾࠾ࡼࡑ 110Υࡲ࡛᪼ ࡍࡿࡇ࡜࡛⤊஢ࡍࡿࡶࡢ࡜⪃࠼ࡽࢀࡿࠋࡑࡢᚋࠊTG ࡣ⣙ 400Υࡲ࡛⦆ࡸ࠿࡟ῶᑡࡋࠊ600Υࡲ࡛ࡣ᫂░࡞ኚ໬ࡣㄆࡵࡽࢀ࡞࠿ࡗࡓࠋ୍᪉ࠊDTA ࡣ⣙ 400Υࡲ࡛ࡸࡸୖ᪼ࡋ࡚࠸ࡿࡼ࠺࡟ぢ࠼ࡿࡀࠊ᫂ࡽ࠿
࡞᭤⥺ࡢኚ໬ࡣㄆࡵࡽࢀ࡞࠿ࡗࡓࠋ
ᐇ㦂᮲௳ࡀ N2 Ẽὶୗ࡛࠶ࡿࡓࡵࠊヨ7*ᩱࡢ⇞↝ࡣ⪃࠼࡟ࡃ࠸ࠋࡑࡢࡓࡵࠊ
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'7$
250Υ௜㏆࠿ࡽ 400Υ௜㏆ࡲ࡛࡟ㄆࡵ
ࡽࢀࡿ TG ᭤⥺ࡢኚ໬ࡣࠊ᭷ᶵ≀ࡢ⇕

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
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ศゎ࡟ࡼࡾ⏕ᡂࡋࡓపศᏊ≀㉁ࡢⓎ


⏕࡟ࡼࡿࡶࡢ࡜᥎ ࡉࢀࡿࠋ

䛆 ㅰ ㎡ 䛇 ᮏ ◊ ✲ ࡣ JSPS ⛉ ◊ ㈝26340032 ࡢຓᡂࢆཷࡅࡓࡶࡢ࡛ࡍࠋ

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௕ ૈ୴૥મ峘ಊആ૖੯ৣ峑峘 7*ҩ'7$ ශ଍A study on pretreatment of tritium analysis in environmental samples using microwave heating
methodAKATA, N., TAKAYAMA, S., TANAKA, M., TAMARI, T., KAKIUCHI, H., SANO, S..

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2B02ᶵ⬟ᛶࢭ࣑ࣛࢵࢡ⭷ࡢỈ⣲ศ㞳ᶵ⬟ࢆ฼⏝ࡋࡓࢺࣜࢳ᳨࣒࢘ฟ
ࢩࢫࢸ࣒ࡢ㛤Ⓨ᰾⼥ྜ◊ ࠊྡ኱㝔ᕤ  ‫⏣ۑ‬୰ᑗ⿱ ࠊᮡᒣ㈗ᙪ 䛆⥴ゝ䛇ࢺࣜࢳ࣒࢘ࡣ༙ῶᮇ 12.32 ᖺࢆ᭷ࡍࡿ࣮࣋ࢱ⥺ᨺฟ᰾✀࡛࠶ࡾࠊ1 GWth ࡢ᰾⼥ྜⓎ㟁
⅔࡛ࡣᖺ㛫࡟࠾࠾ࡼࡑ 56 kg ࡀ⇞ᩱ࡜ࡋ࡚౑⏝ࡉࢀࡿࠋᚑࡗ࡚ࠊ᰾⼥ྜ⅔ࢩࢫࢸ࣒࡛ࡢࢺࣜ
ࢳ࣒࢘Ᏻ඲ྲྀᢅ࠸࡛ࡣࠊ㧗⃰ᗘ࠿ࡽప⃰ᗘࡲ࡛ࠊࡑࡢ≧ែ/໬Ꮫᙧែ࡟ྜࢃࡏࡓ ᐃᡭἲࡀᚲ
せ࡜࡞ࡿࠋࡇࡇ࡛ࡣ᪋タ࡟࠾ࡅࡿ᤼ฟつไ್ࣞ࣋ࣝࡢẼయ≧ࢺࣜࢳ࣒࢘ ᐃࢆᑐ㇟࡟ࠊጉᐖ≀㉁ࡢ㝖ཤࡸ HTO ࡟ࡼࡿ᳨ฟჾෆṧ␃ࢺࣜࢳ࣒࢘ࡢᙳ㡪పῶࠊࢺࣜࢳ࣒࢘ᡂศࡢศ㞳⃰⦰ࢆ┠ⓗ࡜ࡋ࡚ࠊᶵ⬟ᛶࢭ࣑ࣛࢵࢡ⭷࡜ᕷ㈍ࡢẚ౛ィᩘ⟶ࢆ⤌ࡳྜࢃࡏࡓࢺࣜࢳ᳨࣒࢘ฟࢩࢫࢸ
࣒ࢆ㛤ⓎࡋࡓࠋᮏⓎ⾲࡛ࡣࠊᶵ⬟ᛶࢭ࣑ࣛࢵࢡ⭷ࡢỈ⣲ྠ఩యᢳฟ≉ᛶሗ࿌ࢆ୰ᚰ࡟ࠊẚ౛ィᩘ⟶࡜⤌ࡳྜࢃࡏࡓࢺࣜࢳ᳨࣒࢘ฟࢩࢫࢸ࣒ࡢᶵ⬟ホ౯⤖ᯝ࡟ࡘ࠸࡚ࡶሗ࿌ࡍࡿࠋ
䛆ᐇ㦂⿦⨨㻛᪉ἲ䛇 ᶵ⬟ᛶࢭ࣑ࣛࢵࢡ⭷࡜ࡋ࡚ࠊỈ⣲ྠ఩యࢆ㑅ᢥⓗ࡟ᢳฟศ㞳࡛ࡁࡿᅛయ㟁
ゎ㉁ࣉࣟࢺࣥᑟ㟁యࢆ㑅ᢥࡋࡓࠋࢭ࣑ࣛࢵࢡ⤌ᡂࡣࠊ໬ᏛⓗᏳᐃᛶ࡜ᶵᲔⓗᙉᗘࡢほⅬ࠿ࡽࠊ
CaZr0.9In0.1O3-![∦㛢ࡌᆺࠊእᚄ: 14 mm, ෆᚄ: 12 mm, 㛗ࡉ: 340 mm]ࢆ㑅ᢥࡋࡓࠋヨᩱࡢෆእ࡟ⓑ㔠࣮࣌ࢫࢺ㟁ᴟ[እഃ㟁ᴟ㠃✚: 62 cm2]ࢆྲྀࡾ௜ࡅࠊ࢔ࣀ࣮ࢻ࠾ࡼࡧ࢝ࢯ࣮ࢻ࡜ࡋࡓࠋᐇ
㦂࡛ࡣࠊᐊෆ✵Ẽࢆᜏ Ỉᵴ࡟ᾐࡋࡓࢺࣜࢳ࣒࢘Ỉ[HTO]ࣂࣈࣛ࡟㏻Ẽࡋࠊヨᩱࡢ࢔ࣀ࣮ࢻഃ
࡟ᑟධࡋࡓࠋヨᩱࢆ㟁Ẽ⅔࡛ 973 K ࡟ຍ⇕ࡋࠊ㟁ᴟ㛫࡟┤ὶ㟁ὶࢆ㏻㟁ࡍࡿࡇ࡜࡛ࢺࣜࢳ࢘
࣒ࢆᢳฟࡋࡓࠋ࢝ࢯ࣮ࢻഃ࡟ᢳฟࡉࢀࡓࢺࣜࢳ࣒࢘[HT]ࡣࠊ࢔ࣝࢦࣥ࢞ࢫ࡛ࣃ࣮ࢪࡉࢀࠊỈࣂࣈࣛἲࡶࡋࡃࡣᕷ㈍ࡢẚ౛ィᩘ⟶[LB-110, Berthold]࡟ࡼࡾ⃰ᗘࢆ ᐃࡋࡓࠋ䛆ᐇ㦂⤖ᯝ䛇 ᅗ 1 ࡟ࠊᐃ㟁ὶືస࡟࠾ࡅࡿỈ⣲ᅇ཰⋡࡜ᢳฟࢺࣜࢳ࣒࢘⃰ᗘࡢỈ⵨Ẽศᅽ౫Ꮡᛶࢆ♧ࡍࠋࣉࣟࢺࣥᑟ㟁య࡛ࡣࠊỈ⣲ྠ఩యᢳฟ㔞ࡀỈ⵨Ẽศᅽࡢ 1//2 ஌࡟ẚ౛ࡍࡿࡇ࡜ࡀ
▱ࡽࢀ࡚࠸ࡿࠋ୍᪉࡛ࠊᐃ㟁ὶືస࡛ࡣࠊỈ⵨Ẽศᅽࡀᅇ཰⋡࡟┤᥋ᙳ㡪ࢆ୚࠼ࡿࠋᥦ᱌ࡋ
࡚࠸ࡿࢩࢫࢸ࣒࡛ࡣࠊ⃰⦰ಸ⋡ࡸ ᐃࡉࢀࡓࢺࣜࢳ࣒࢘⃰ᗘ࡜࡜ࡶ࡟ࠊᅇ཰⋡ࡶ⪃៖ࡋ࡞ࡅࢀࡤ࡞ࡽ࡞࠸ࠋᅗ 2 ࡟ࠊᑟධࡋࡓࢺࣜࢳ࣒࢘⃰ᗘ࡜᳨ฟࢩࢫࢸ࣒࡟ࡼࡾ᥎ᐃࡉࢀࡓࢺࣜࢳ࢘
࣒⃰ᗘࡢ┦㛵ࢆ♧ࡍࠋ್ࡣ࢚࣮ࣛࡢ⠊ᅖ୍࡛⮴ࡋ࡚࠾ࡾࠊᮏࢩࢫࢸ࣒ࡢጇᙜᛶࡀ♧ࡉࢀࡓࠋ䛆ㅰ㎡䛇 ᮏ◊✲ࡣࠊ᰾⼥ྜ⛉Ꮫ◊✲ᡤ LHD ⿦⨨ィ
6Experimental conditions⏬ண⟬[NIFS13ULAA022]ࠊ࠾ࡼࡧ୍㒊 LHD ィ⏬ඹ
5 Anode gas flow: 300 cm /mCurrent density: 8 mA/cm
ྠ◊✲[NIFS13KOBA029]ࡢᨭ᥼ࢆཷࡅࡲࡋࡓࠋ
Pressure in cathode: 35 kPa
1500

0.8
1000

0.6
Experimental conditions

0.4

500

3

Anode gas flow: 300 cm /mCurrent density: 8 mA/cm2
Pressure in cathode: 35 kPa
Temperature: 973 K

0.2
0

0.5

1

1.5
2
Water vapor partial pressure [kPa]2.5

0

Estimated tritium concentration [Bq/cm3]

Hydrogen recovery rate [-]1

Tritium concentration in the cathode [kBq/m3]

3

2

4

Temperature: 973 K

3

2

1

1

2

3

4

5

6

Tritium concentration in anode compartment [Bq/cm㻟]ᅗ 1 Ỉ⣲ྠ఩యࡢᅇ཰⋡࡜ᢳฟࢺࣜࢳ࣒࢘⃰ᗘࡢ ᅗ 2 ᳨ฟࢩࢫࢸ࣒࡟࠾ࡅࡿ౪⤥࠾ࡼࡧ᥎ᐃࡉࢀࡓࢺࣜࢳ࣒࢘⃰ᗘࡢ┦㛵Ỉ⵨Ẽศᅽ౫Ꮡᛶ
Development of tritium detector system combined with proton conductor ceramic membrane
TANAKA, M., SUGIYAMA, T..

- 73 -

2B03

Ỉࣂࣈ࣮ࣛ࡜ CuO ゐ፹ࢆ⏝࠸ࡓࢺࣜࢳ࣒࢘ᅇ཰ࢲ࢖ࢼ࣑ࢵࢡࢫ
㸦㟼኱㝔⌮ 1ࠊᐩᒣ኱Ỉ⣲◊ 2㸧○బ⸨⨾ဏ 1ࠊ‫‮‬ᒣ೺ኴ 1ࠊཎ ṇ᠇ 2ࠊἼከ㔝㞝἞ 2ࠊᯇᒣᨻኵ 2ࠊ㏆⏣ᣅᮍ 1ࠊ኱▮ᜤஂ 1࠙⥴ゝࠚᨺᑕ⥺᪋タ࡛ࡣỈ⣲ྠ఩యࡢࢺ࣮ࣞࢧ࣮࡜ࡋ࡚ࢺࣜࢳ࣒࢘ࡀ⏝࠸ࡽࢀࡿࡀࠊඖ⣲≧㸦Ẽయ㸧ࡢࢺࣜࢳ࣒࢘ࡣ HEPA ࣇ࢕ࣝࢱ࣮➼࡟ᤕ㞟ࡉࢀࡎࡑࡢࡲࡲ⎔ቃ୰࡟ᨺฟࡉࢀࡿࠋ♫఍ⓗཷᐜᛶࢆ㧗ࡵࡿࡓࡵ࡟ࡣࠊ⎔ቃ࡬ࡢᨺฟ๓࡟Ᏻ඲࡛☜ᐇ࡞ᅇ཰ࡀᚲせ࡛࠶ࡿࠋᮏ◊✲࡛ࡣࠊࢺࣜ
ࢳ࣒࢘ᐇ㦂࡛⏝࠸ࡽࢀࠊ┿✵ᐜჾ࠿ࡽ᤼Ẽࡉࢀࡓࢺࣜࢳ࣒࢘࢞ࢫ(HT)ࢆ✀ࠎࡢ᮲௳࡛㓟໬㖡࡟࡚㓟໬ࡋࡓᚋࡢỈࣂࣈ࣮࡛ࣛࡢᅇ཰ᣲື࡟ࡘ࠸࡚ホ౯ࡋࡓࠋࡲࡓࠊ㓟໬㖡ࡢ ᗘࡸ࢟ࣕࣜ
࢔࢞ࢫࡢὶ㔞ࢆࣃ࣓࣮ࣛࢱ࡜ࡍࡿࡇ࡜࡛ࢺࣜࢳ࣒࢘࢞ࢫࡢ㓟໬཯ᛂ㏿ᗘࡢᐃ㔞ࢆ⾜ࡗࡓࠋ࠙ᐇ㦂ࠚ㟼ᒸ኱Ꮫ⌮Ꮫ㒊ᨺᑕ⛉Ꮫᐇ㦂Ჷ࡟タ⨨ࡉࢀࡓࢺࣜࢳ࣒࢘࢖࢜ࣥ↷ᑕ⿦⨨࡟᤼Ẽࢺࣜࢳ࣒࢘
࢞ࢫࣔࢽࢱࣜࣥࢢࢩࢫࢸ࣒ࢆタ⨨ࡋࠊࢺࣜࢳ࣒࢘ᅇ཰ᐇ㦂ࢆ⾜ࡗࡓࠋᮏࢩࢫࢸ࣒࡛ࡣࠊ ᐃ㒊࡜ࡋ࡚ẚ౛ィᩘ⟶࡜㓟໬ゐ፹࡜ࡋ࡚㓟໬㖡ࠊHTO ᅇ཰⣔࡜ࡋ࡚Ỉࣂࣈ࣮ࣛࢆ⏝࠸ࡓࠋ↷ᑕ⿦⨨࠿ࡽ᤼Ẽࡉࢀࡓ HT ࢆᅇ཰࢞ࢫ࡛࠶ࡿ PR ࢞ࢫ࡜࡜ࡶ࡟୍ࡘ┠ࡢẚ౛ィᩘ⟶࡟ᑟධࡋࠊ᤼
Ẽࡉࢀࡓ඲࡚ࡢࢺࣜࢳ࣒࢘㔞ࢆ ᐃࡋࡓࠋ஧ࡘ┠ࡢẚ౛ィᩘ⟶ࡢ┤๓࡟㓟໬ゐ፹⟶ཬࡧỈࣂࣈ࣮ࣛࢆタ⨨ࡋࠊ㓟໬ࡉࢀࡓ HT ࡣ HTO ࡜ࡋ࡚Ỉࣂࣈ࣮࡛ࣛᤕ㞟ࡉࢀࡿࡇ࡜ࢆ฼⏝ࡋࠊ஧ࡘ┠ࡢẚ౛ィᩘ⟶࡟࡚ᮍ཯ᛂࡢ HT ࡢࡳࢆ ᐃࡋࡓࠋ୍ࡘ┠࡜஧ࡘ┠ࡢẚ౛ィᩘ⟶࡛ ᐃࡋࡓࢺࣜࢳ࣒࢘⃰ᗘࡢẚࢆ㌿᥮⋡࡜ᐃ⩏ࡋࠊ㓟໬ゐ፹ ᗘࢆ 298 - 815 Kࠊᅇ཰࢞ࢫὶ㏿ࢆ 10 - 150
sccm ࡟࡚ኚ໬ࡉࡏࠊྛࣃ࣓࣮ࣛࢱ࡜㌿᥮⋡ࡢ┦㛵ᛶࢆ᫂ࡽ࠿࡟ࡍࡿࡇ࡜࡛ࢺࣜࢳ࣒࢘㓟໬཯ᛂ࡟࠾ࡅࡿ཯ᛂ㏿ᗘㄽࢆ᳨ウࡋࡓࠋ࠙⤖ᯝ࣭⪃ᐹࠚ
㌿᥮⋡ࡢゐ፹ ᗘ౫Ꮡᛶᐇ㦂ࡢ⤖ᯝࠊゐ፹ᗘࡀୖ᪼ࡍࡿ࡜ゐ፹཯ᛂࡢ㐍⾜㏿ᗘࡀቑຍࡋ

㌿᥮⋡ࡀቑຍࡍࡿࡇ࡜ࡀ♧ࡉࢀࡓࠋࡲࡓࠊᅇ཰࢞ࢫࡢὶ㏿౫Ꮡᛶᐇ㦂࡛ࡣὶ㏿ࡢୖ᪼࡜ඹ࡟
㌿᥮⋡ࡣῶᑡࡋࡓࠋࡇࢀࡣࠊHT ࡀゐ፹࡟ࡼࡾ㓟໬ࡉࢀࡿࡓࡵࡢ༑ศ࡞᫬㛫ࡀ☜ಖ࡛ࡁ࡞࠸ࡓ
ࡵࡔ࡜♧၀ࡉࢀࡓࠋᅗ࡟ࠊྛ

ᗘ࡟࠾ࡅࡿ㓟໬཯ᛂ㏿ᗘࢆ♧ࡍࠋ473 K ௨ୖࡢᗘ㡿ᇦ࡛ࡣ㓟໬཯㻌-6-8

࠾ࡾࠊ㓟໬཯ᛂ㏿ᗘࡣ k [s ]= 5.410 exp(-0.65-102[eV] / kBT)࡛⾲ࡉࢀࡓࠋᮏⓎ⾲࡛ࡣࠊ⟬ฟࡋࡓ㓟
໬཯ᛂ㏿ᗘᘧࢆ⏝࠸┠ᶆ࡜ࡍࡿࢺࣜࢳ࣒࢘㝖ཤ
⋡(1/1000)ࢆ㐩ᡂࡍࡿࡓࡵ࡟ᚲせ࡞཯ᛂ⟶ࡢ㛗ࡉࡢᗘ౫Ꮡᛶࢆぢ✚ࡶࡾࠊᐇ㦂⿦⨨タィࡢࡓࡵ࡟㔜せ࡞ᣦᶆ࡟ࡘ࠸࡚㆟ㄽࡍࡿࠋln k / s-1-1ᛂࡢᚊ㏿ẁ㝵ࡀࡦ࡜ࡘࡢ཯ᛂᶵᵓ࡟ᨭ㓄ࡉࢀ࡚

473 K

-12
-14
-16
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0-11000/T / Kᅗ ྛ ᗘ࡟࠾ࡅࡿ㓟໬཯ᛂ㏿ᗘ

Dynamics of tritium recovery systems using water bubbler and CuO catalyst
Sato M., Yuyama K., Hara M., Hatano Y., Matsuyama M., Chikada T.,Oya Y.
SATO,M.,YUYAMA,K.,HARA,M.,HATANO,Y.,MATSUYAMA,M.,CHIKADA,T.,OYA,Y.

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2B04࢔ࢡࢳࣀ࢖ࢻࡢ㟁ゎ㑏ඖ࡟క࠺ᚤ⢏ᏊᙧᡂཎᏊຊᶵᵓ ‫ۑ‬໭㎷❶ᾈࠊ㡢㒊἞ᖿࠊΏ㑓㞞அࠊᮌᮧ㈗ᾏ

I / nAI / nA䛆⥴ゝ䛇㠀㓟ᛶ⁐ᾮ୰ࡢ࢔ࢡࢳࣀ࢖ࢻ࢖࢜ࣥࡣỈ㓟໬≀㘒యࢆᙧᡂࡋ᫆ࡃࠊ≉࡟ 4 ౯࢖࢜ࣥ࡞
࡝ࡢ኱ࡁ࡞㟁Ⲵࢆ᭷ࡍࡿ࢖࢜ࣥࡣࢥࣟ࢖ࢻࡸ㓟໬≀ᚤ⢏Ꮚࢆᙧᡂࡍࡿࡇ࡜ࡀ▱ࡽࢀ࡚࠸ࡿ 1)ࠋ
Ⓨ⾲⪅ࡽࡣࠊᙅ㓟ᛶ࠿ࡽ୰ᛶ⁐ᾮ୰࡛ࡢ࢔ࢡࢳࣀ࢖ࢻ࢖࢜ࣥࡢ㓟໬㑏ඖ㟁ᴟ཯ᛂࡸࠊཎᏊ౯
ኚ໬࡟క࠺ᚤ⢏Ꮚᙧᡂ཯ᛂࢆㄪ࡭࡚ࡁࡓࠋࡇࢀࡲ࡛࡟ᙅ㓟ᛶ⁐ᾮ୰࡛ࡢ㟁ゎ࡟ࡼࡿ U(VI)ࡢ
U(V)࡬ࡢ㑏ඖ࡟క࠸㟁ᴟ⾲㠃ࡸࣂࣝࢡ⁐ᾮ┦࡟࢘ࣛࣥࡢจ㞟యࡀᯒฟࡍࡿࡇ࡜ࠊࡇࢀࡽࡀ⤖ᬗᛶࡢప࠸ UO2 ࡛࠶ࡿࡇ࡜ࠊจ㞟┦Ꮡᅾୗ࡛ U(V)ࡢ୙ᆒ໬཯ᛂࡸ U(V)ࡢ㟁ᴟ㑏ඖࡀಁ㐍ࡉࢀࡿࡇ࡜࡞࡝ࢆ᫂ࡽ࠿࡟ࡋ࡚ࡁࡓ 2)ࠋᮏⓎ⾲࡛ࡣࠊ㧗⃰ᗘ U ⁐ᾮ࡛ࡢ㟁ゎ㑏ඖᣲື࡜จ㞟┦ᙧᡂ࡟ࡘ࠸࡚ㄪ࡭ࡓ⤖ᯝࢆ㏙࡭ࡿࠋ䛆ᐇ㦂䛇㔠ᚤᑠ㟁ᴟ㸦┤ᚄ 10 ȣm㸧ࢆస⏝ᴟ࡟⏝࠸࡚࣎ࣝࢱ࣓ࣥࢺ࣮ࣜ ᐃࢆ⾜ࡗࡓࠋཧ↷ᴟཬࡧᑐᴟ࡟ࡣࡑࢀࡒࢀ㖟㸫ሷ໬㖟㟁ᴟ㸦SSE㸧ཬࡧⓑ㔠㟁ᴟࢆ⏝࠸ࡓࠋᨭᣢ㟁ゎ㉁࡜ࡋ࡚
NaClO4 ࢆྵࡴ U ⁐ᾮࢆㄪ〇ࡋࠊN2 ࢞ࢫ࡟ࡼࡿ㝖㓟⣲ࢆ༑ศ࡟⾜ࡗࡓᚋࠊ㟁Ẽ໬Ꮫ ᐃࡋࡓࠋ୍ᐃ
20᫬㛫࣭㟁఩ᕪ࡛๓㟁ゎࡋࡓᚋ࣎ࣝࢱ࣓ࣥࢺ࣮ࣜ
pH 3.0ᐃࡋࠊ྾╔໬Ꮫ✀ࡢ㓟໬㑏ඖᣲືࢆㄪ࡭ࡓࠋ
䛆⤖ᯝ䞉⪃ᐹ䛇㟁ゎ㑏ඖ࡟క࠺ U ࡢ㟁ᴟ࡬ࡢ྾╔ᣲ0ືࢆㄪ࡭ࡿࡓࡵ࡟ࠊ5 mM ࡢ࢘ࣛࣥࢆྵࡴ pH㸯࠿
ࡽ 3 ࡢ⁐ᾮ୰࡛-0.3V ࡛ 600 ⛊㛫๓㟁ゎࢆ⾜࠸ࠊ-20ࡑࡢᚋࢧ࢖ࢡࣜࢵࢡ࣎ࣝࢱ࣓ࣥࢺ࣮ࣜ ᐃࡋࡓ࡜ࡇࢁࠊpH 3 ௨ୖࡢ⁐ᾮ୰࡛+0.2 V ࡟ᯒฟ໬Ꮫ
-40✀ࡢ㓟໬࡟㉳ᅉࡍࡿ㢧ⴭ࡞㟁ὶࣆ࣮ࢡࢆほ ࡋ
pH 2.0ࡓࠋ୍᪉ pH 2 ࡼࡾప࠸㓟ᛶᗘࡢ⁐ᾮ୰࡛ࡣ㓟໬-60㟁ὶࣆ࣮ࢡࡣほ ࡛ࡁ࡞࠿ࡗࡓࠋU ⃰ᗘࢆ 50 mM
20࡟ቑࡋࡓ࡜ࡇࢁࠊpH 2.0 ཬࡧ 3.0 ࡢ⁐ᾮ୰࡛+0.2V௜㏆࡟㓟໬㟁ὶࣆ࣮ࢡࡀほ ࡉࢀࠊ≉࡟ pH 3.00ࡢሙྜ࡟㢧ⴭ࡛࠶ࡗࡓ㸦ᅗཧ↷㸧ࠋࡲࡓࠊpH 2.0
ࡢሙྜ࡟-0.17 V ࡟ほ ࡉࢀࡿ U(VI)ЍU(V)ࡢྍ
㏫ᛶࡢ㧗࠸㑏ඖἼࡀࠊpH 3.0 ࡢ⁐ᾮ࡛ࡣ኱ࡁࡃኚ
-20໬ࡋࡓࠋࡇࢀࡣ U(VI)ࡢ㟁ᴟ㑏ඖ࡟ࡼࡾ㟁ᴟୖ࡟
pH 1.0ᯒฟࡋࡓ໬Ꮫ✀࡟ࡼࡾ㟁ᴟ཯ᛂࡀ㜼ᐖࡉࢀ࡚࠸
-40ࡿࡇ࡜ࢆ♧၀ࡋ࡚࠸ࡿࠋ୍᪉ࠊpH 1.0 ࡢ⁐ᾮࡢሙྜࠊ㓟໬㟁ὶࣆ࣮ࢡࡣ-50mV ࡟ほ ࡉࢀࡓࠋ๓㟁
-60
-0.5
0
0.5
1
ゎᚋ࡟୍᫬ⓗ࡟㟁఩༳ຍࢆ೵Ṇࡍࡿ࡜ྠ㟁ὶࣆ
E / V vs SSE࣮ࢡࡀᾘ⁛ࡋࠊࡇࡢᯒฟ໬Ꮫ✀ࡣᐜ᫆࡟㟁ᴟ࠿ࡽ⬺㞳ࡍࡿ࡞࡝ࠊࡇࢀࡲ࡛࡟ほ ࡉࢀࡓୖ㏙ࡢ໬Ꮫ ᅗ U(VI)ࡢࢫࢺࣜࢵࣆࣥࢢ࣎ࣝࢱࣔࢢࣛ
✀࡜ࡣ໬Ꮫⓗᛶ㉁ࡀ␗࡞ࡿࠋ࣒ 㟁ᴟ㸸10ȣmȭ㔠ࢹ࢕ࢫࢡ㟁ᴟࠊ⁐1)Neck, N., et al., Radiochim. Acta 89(2001)1.
ᾮ㸸50 mM U(VI) + 0.1M NaClO4ࠊ๓㟁ゎ2)Y. Kitatsuji et al., Electrochim. Acta, in press.
㟁఩㸸-0.3V vs SSEࠊ㟁఩ᤲᘬ㏿ᗘ㸸0.1V s-1ࠋAggregation of actinide ion associated with electrode reduction
KITATSUJI, Y., OTOBE, H., WATANABE, M. KIMURA, T.

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2B05㓟⣲㓄఩㓄఩Ꮚ࡜ࣁ࣮ࢻ࡞㔠ᒓ࢖࢜ࣥࡢ㘒యࡢ⣔⤫ⓗศ㢮ᮾ኱㝔⌮ ࠊᗈ኱㝔⌮  ‫ۑ‬㧗ᶫ჆ኵ ࠊᐑᆅளἋ⨾ ࠊ⏣୰㞞ே ࢔ࢡࢳࣀ࢖ࢻࡸࡑࡢ࢔ࢼࣟࢢඖ⣲࡛࠶ࡿࣛࣥࢱࣀ࢖ࢻ㸦Ln㸧ࡢ⁐ᾮ୰࡛Ᏻᐃ࡞໬Ꮫ✀ࡢ⪃ᐹࡣࠊࡇࢀࡽࡢ࢖࢜ࣥࡢ໬Ꮫศ㞳ࡸᆅ⌫⾲ᒙ࡛ࡢᣲືࢆ⌮ゎࡍࡿୖ࡛ᇶ♏ⓗ࡛࠶ࡿࠋ≉࡟ࡇࢀࡽࡢ࢖࢜ࣥࡣ㏻ᖖࣁ࣮ࢻ࡞࢖࢜ࣥ࡜ࡋ࡚ࡩࡿࡲ࠸ࠊ㓟⣲㓄఩ࡢ㓄఩Ꮚ࡜ࡢ㘒⏕ᡂࡀ㔜せ࡛࠶ࡿࠋᆅ⌫⾲ᒙ࡛㔠ᒓ㝧࢖࢜ࣥ࡜㘒⏕ᡂࡍࡿ㓟⣲㓄఩㓄఩Ꮚ࡜ࡋ࡚ࠊỈ㓟໬≀࢖࢜ࣥ௨እ࡟
Ⅳ㓟࢖࢜ࣥࠊࣜࣥ㓟࢖࢜ࣥࠊ࢝ࣝ࣎ࣥ㓟࢖࢜ࣥ࡞࡝㸦㸻࢜࢟ࢯ㓟࢖࢜ࣥ࡜ࡍࡿ㸧ࡀ㔜せ࡛࠶ࡿࠋࡇࢀࡽࡣ࠸ࡎࢀࡶ㓟⣲㓄఩ࡢࣁ࣮ࢻ࡞㓄఩Ꮚ࡛࠶ࡿࡀࠊ࡝ࢇ࡞㝧࢖࢜ࣥࡀỈ㓟໬≀࢖࢜ࣥ࡜࢜࢟ࢯ㓟࢖࢜ࣥࡢ࠸ࡎࢀࢆዲࡴ࠿࡜࠸࠺Ⅼ࡟ࡘ࠸࡚ࠊࡇࢀࡲ࡛᫂☜࡟ࡣ㆟ㄽࡉࢀ࡚ࡇ࡞
࠿ࡗࡓ࡜ࡳࡽࢀࡿࠋࡋ࠿ࡋࠊ౛࠼ࡤ✵Ẽᖹ⾮ࡢⅣ㓟࢖࢜ࣥᏑᅾୗ࡛ᵝࠎ࡞࢖࢜ࣥࡢ⁐Ꮡ✀ࢆィ⟬ࡍࡿ࡜ࠊ࢖༙࢜ࣥᚄࡢ኱ࡁ࡞࢖࢜ࣥ࡯࡝Ⅳ㓟࢖࢜ࣥࢆዲࡴഴྥࡀ࠶ࡿࡇ࡜ࡀศ࠿ࡿࠋ
ࡇࡢࡼ࠺࡞Ỉ㓟໬≀࡜࢜࢟ࢯ㓟㘒యࡢᏳᐃᛶࡢ㐪࠸ࡣࠊỈ࿴ࡋࡓ㔠ᒓ࢖࢜ࣥ Mz+•nH2O ࡜㓄఩Ꮚ L ࡜ࡢ㘒⏕ᡂ཯ᛂࡢᶆ‽཯ᛂ⮬⏤࢚ࢿࣝࢠ࣮ኚ໬㸦!G0㸧 ࡜ࠊࡑࡢ཯ᛂࡢᶆ‽཯ᛂ࢚ࣥࢱࣝࣆ࣮ኚ໬㸦!H0㸧࠾ࡼࡧᶆ‽཯ᛂ࢚ࣥࢺࣟࣆ࣮ኚ໬㸦!S0㸧࠿ࡽ㆟ㄽ࡛ࡁࠊࡇࡢ࠺ࡕ !S0ࡣࠊ㘒⏕ᡂ཯ᛂ࡟ࡼࡾ⬺Ỉ࿴ࡋࡓỈࡢᩘ࡟ᨭ㓄ࡉࢀࡿ࡜ᮇᚅࡉࢀࡿࠋ⇕ຊᏛⓗࢹ࣮ࢱࡀ㇏ᐩ
࡛Ⅳ㓟࡜㢮ఝࡋ࡚࠸ࡿ㘒య࡜ࡋ࡚ࠊ㓑㓟㘒యࡢ⇕ຊᏛⓗᐃᩘࢆ⏝࠸ࠊỈ㓟໬≀࢖࢜ࣥ࡜ࡢ㘒యࡢࢹ࣮ࢱ࡜ẚ㍑ࢆࡋࡓࠋ㓑㓟㘒య࡟ࡘ࠸࡚ࠊᑠࡉ࡞࢖࢜ࣥ㸦2 ౯࡛ࡣ Be2+ࠊMg2+࡞࡝㸹3
౯࡛ࡣ Al3+ࠊSc3+ࠊFe3+࡞࡝㸧࡛ࡣṇࡢ !S0 ࢆ♧ࡍࡀࠊ኱ࡁ࡞࢖࢜ࣥ㸦2 ౯࡛ࡣ Cd2+ࠊBa2+㸹3
౯࡛ࡣ Sc3+ࠊY3+ࠊLn3+㸧࡛ࡣ㈇࡞࠸ࡋ 0 ࡟㏆࠸ !S0 ࢆ♧ࡍࠋ࢝ࣝ࣎࢟ࢩࣝᇶࡸⅣ㓟࢖࢜ࣥࡣࠊ
ከࡃࡢỈศᏊࡀ㝖࠿ࢀ࡝ࡢࡼ࠺࡞࢖࡛࢜ࣥࡶ !S0 ࡀṇ࡟࡞ࡿࠋࡋ࠿ࡋࠊỈ㓟໬≀࢖࢜ࣥࡢሙ
ྜࠊᑠࡉ࡞㝧࢖࡛࢜ࣥࡣỈ㓟໬≀࢖࢜ࣥ࡜ࡢ㘒⏕ᡂ࡟ࡼࡿỈ࿴ᵓ㐀ࡢ◚ቯࡀ኱ࡁ࡞ !S0 ࢆ⏕ࡴࡀࠊ኱ࡁ࡞࢖࡛࢜ࣥࡣࡇࡢຠᯝࡣᑠࡉࡃ !S0 ࡢ฼ᚓࡣᑠࡉ࠸ࠋࡑࡢࡓࡵࠊ኱ࡁ࡞࢖࡛࢜ࣥ
ࡣ┦ᑐⓗ࡟ຍỈศゎࡀ㉳ࡁ࡟ࡃࡃࠊ࢜࢟ࢯ㓟㘒యࡀ┦ᑐⓗ࡟Ᏻᐃ࡟࡞ࡿࠋ
ḟ࡟㔞Ꮚ໬Ꮫィ⟬ࢆ⏝࠸࡚ࠊࡇࢀࡽࡢ࢖࢜ࣥ࡜㓄఩Ꮚࡢ㊥㞳ࢆㄪ࡭ࡓࠋ≉࡟ࠊ㔠ᒓ࢖࢜ࣥ㸦M: Be2+ࠊBa2+ࠊSc3+ࠊY3+, La3+㸧࡜㓄఩Ꮚ㸦L: Ỉ㓟໬≀ࠊ࢝ࣝ࣎ࣥ㓟ࠊⅣ㓟ࠊࣜࣥ㓟㸧ࡢ㘒య ML ࡟㓄఩ࡋࡓ H2O ࢆ 1 ࡘࡎࡘቑຍࡉࡏ㸦ML(H2O)nࠊn=1-20㸧ࠊ㔠ᒓ࢖࢜ࣥ࡜㓄఩Ꮚࡢ⤖ྜ㊥㞳㸦rn㸧ࢆぢ✚ࡶࡗࡓࠋࡇࡢ rn ್࠿ࡽࠊn=0 ࡢ⤖ྜ㊥㞳㸦r0㸧ࢆᘬࡁࠊnH2O ࡢ࡜ࡁࡢ M㸫L ࡢ⤖ྜ㊥㞳ࡢቑຍ㔞(!rn)ࢆồࡵࠊ௨ୗࡢ㆟ㄽ࡟⏝࠸ࡓࠋィ⟬࡟ࡣ Gaussian09 ࡟ࡼࡿ
Hartree-Fock ἲࢆ⏝࠸ࠊᇶᗏ㛵ᩘ࡜ࡋ࡚ 6-31G* (HࠊOࠊC)࠾ࡼࡧ LANL2DZ (BeࠊCaࠊBaࠊScࠊ
YࠊLa)ࢆ౑ࡗࡓࠋ࢖༙࢜ࣥᚄࡢᑠࡉ࡞࢖࢜ࣥ㸦Be2+ࠊSc3+ࠊY3+㸧ࡢሙྜࠊ!rn (n=20) ࡣ㓄఩Ꮚ࡟ࡼࡽࡎ࡯ࡰ୍ᐃࡢ್ࢆ♧ࡋࡓࠋ୍᪉ࠊ࢖༙࢜ࣥᚄࡢ኱ࡁ࡞࢖࢜ࣥ㸦Ba2+ࠊLa3+㸧ࡢ !rn (n=15)
࡛ࡣࠊOH ࡜ࡢሙྜࡔࡅ㢧ⴭ࡟ !rn ࡀ㛗ࡃ࡞ࡗࡓࠋࡘࡲࡾࠊ࢖༙࢜ࣥᚄࡀ኱ࡁ࡞࢖࢜ࣥ࡜ OH
ࡢ⤖ྜࡣ┦ᑐⓗ࡟ᙅࡃࠊࡼࡾእᅪᆺࡢ㘒యࢆ⏕ᡂࡋࠊ⬺Ỉ࿴ࡍࡿỈࡢᩘࡀᑡ࡞࠸ࡓࡵ࡟ࠊOH
㘒యࡢᏳᐃᛶࡀప࠸ࡇ࡜ࡀศ࠿ࡗࡓࠋ
ࡇ࠺ࡋࡓ࢖࢜ࣥ㛫ࡢ㐪࠸ࡣࠊኳ↛ࡢ㖔≀ࡢᏑᅾ࡟ࡶ཯ᫎࡉࢀࠊᑠࡉ࡞࢖࡛࢜ࣥ࠶ࡿ Be2+ࡣ࢔ࣝ࢝ࣜᅵ㢮࢖࡛࢜ࣥ࠶ࡿࡀⅣ㓟ሷ࡟ࡣศ㓄ࡉࢀ࡟ࡃ࠸ࠋࡲࡓ Mg2+ ࡣỈ㓟໬≀ࡢỿẊ㸦brucite㸧ࢆᙧᡂࡍࡿࡀࠊCa2+௨㝆ࡢࡼࡾ኱ࡁ࡞࢔ࣝ࢝ࣜᅵ㢮࢖࢜ࣥࡣỈ㓟໬≀ࡼࡾࡶⅣ㓟ሷࡸࣜࣥ㓟ሷࢆዲࡴࠋ3 ౯࡛ࡶྠᵝ࡟ࠊࢧ࢖ࢬࡀᑠࡉ࡞ Al3+ࡸ Fe3+࡛ࡣỈ㓟໬≀ࡢỿẊࡀ㔜せ࡛࠶ࡿࡀࠊLn3+ࡣⅣ㓟ሷ࣭ࣜࣥ㓟ሷ㖔≀࡜ࡋ࡚ぢฟࡉࢀࠊ㔠ᒓ㈨※࡜ࡋ࡚㔜せ࡛࠶ࡿࠋ
Systematic difference in the stabilities of complexes of hard cations with various oxygen-donor
ligands
TAKAHASHI, Y., MIYAJI, A., TANAKA, M.

- 76 -

2B06࢘ࣛࣥ໬ྜ≀ࢆྵ᭷ࡍࡿ࢖࢜ࣥᾮయࡢྜᡂ࡜ศග≉ᛶ
JAEA ᇶ♏ᕤ ࠊᮾ໭኱ከඖ◊  ‫ۑ‬㟷ᰗⓏ ࠊΏ㑓㞞அ ࠊᮌᮧ㈗ᾏ ࠊ᱒ᓥ㝧 ࠊబ⸨ಟᙲ 

䛆⥴ゝ䛇 ࢔ࢡࢳࣀ࢖ࢻඖ⣲ࡢ࡞࠿࡛㸪࢘ࣛࣥࡣཎᏊ౯ࡸ㓄఩Ꮚሙ࡟ᛂࡌ࡚ⓎⰍࡀኚ໬ࡋ㸪ᙉ࠸Ⓨගࢆ♧ࡍࡇ࡜࠿ࡽ㸪ศගᏛⓗ◊✲ࡀᗈࡃ࡞ࡉࢀ࡚ࡁࡓ 1ࠋ㏆ᖺࢃࢀࢃࢀࡣ㸪࢘ࣛࢽࣝ࣌ࣥࢱ
࢟ࢫ࢖ࢯࢳ࢜ࢩ࢔ࢼࢺ㘒య㸪UO2(NCS)53-㸪ࡢࢧ࣮ࣔࢡ࣑ࣟࢬ࣒ࢆぢฟࡋ㸪⇕⪏ᛶࡢ㧗࠸ࢳ࢜ࢩ࢔ࢼࢺྵ᭷࢖࢜ࣥᾮయࢆ⏝࠸࡚㸪6 ౯࢘ࣛࢽࣝ㸦UO22+㸧ࡢ㉥㐨㠃ࡢ㓄఩ᩘࢆ⣔እ࠿ࡽࡢ⇕ࡢᤵཷ࡟ࡼࡗ࡚ไᚚ࡛ࡁࡿࡋࡃࡳࢆ᫂ࡽ࠿࡟ࡋࡓ 2ࠋ୍᪉㸪ࢳ࢜ࢩ࢔ࢼࢺྵ᭷࢖࢜ࣥᾮయࡣ㸪⁐ᏑࡍࡿẼయࢆ෾⤖஝⇱࡛ᐜ᫆࡟㝖ཤ࡛ࡁࡿ࡜࡜ࡶ࡟㸪4 ౯ࡢ࢘ࣛࢼࢫ࢖࢜ࣥ(U4+)ࢆ㧗⃰ᗘ࡟⁐ゎ࡛ࡁ㸪኱Ẽ㞺ᅖẼୗ࡛Ỉ⁐ᾮࡸ᭷ᶵ⁐፹ࡼࡾࡶ㛗ᮇ࡟ࢃࡓࡾᏳᐃ࡟⁐Ꮡࡉࡏࡿࡇ࡜ࡀ
ྍ⬟࡛࠶ࡿࠋᾮ┦୰ࡢ 4 ౯ࡢศග◊✲࡛ࡣ㸪㘒యࡢⓎග࡟㛵ࡍࡿࡶࡢࡀᕼᑡ࡛࠶ࡾ㸪㘒యᵓ㐀࡜㟁Ꮚᵓ㐀ࡢ┦㛵ࡣከࡃࡀᮍゎ࡛᫂࠶ࡿ 3ࠋᮏ◊✲࡛ࡣ㸪࢘ࣛࢼࢫྵ᭷࢖࢜ࣥᾮయࢆྜᡂࡋ㸪
UV-Vis-NIR㸦⣸እྍど㏆㉥እ㸧྾཰ศග㸪᫬㛫ศゎⓎගศගࢆ ᐃࡋࠊᇶᮏⓗ࡞ศගⓗᛶ㉁ࢆㄪ࡭ࡓࠋ䛆ᐇ㦂䛇ᅄࣁࣟࢤࣥ໬࢘ࣛࣥ㸪UX4(X = F, Cl, Br, I)㸪ࡣᑒ⟶⣔࠶ࡿ࠸ࡣ㛤ᨺ⣔࡟࠾ࡅࡿᅛẼ཯ᛂ࡟ࡼࡾྜᡂࡋࡓࠋ୍౛࡜ࡋ࡚ሷ໬≀ࡢྜᡂࢆ⡆༢࡟グࡍࠋ㓟໬࢘ࣛࣥ(U3O8)ࢆ࢔ࣝࢦࣥ㞺ᅖẼୗ࡛㏻Ẽࡋࡓ CCl4 ࡜ࡢ᥋ゐ཯ᛂ(420 °C, 2 ᫬㛫)࡟ࡼࡾ㯮⥳Ⰽࡢ UCl4 ⢊ᮎࢆᚓࡓᚋࠊῶᅽୗ
࡛ࡢ᪼⳹⢭〇(542 °C㸪6 ᫬㛫)࡟ࡼࡾ㸪⃰⥳Ⰽ⤖ᬗࡢ UCl4 ࢆ༢㞳ࡋࡓࠋ⤖ᬗ⢊ᮎࡣ XRD ᐃ࡟ࡼࡗ࡚ࣆ࣮ࢡᖐᒓࡋ㸪⤖ᬗ┦ࢆྠᐃࡋࡓࠋᚓࡽࢀࡓ UX4 ࢆ 1-࣓ࢳࣝ-3-࢔ࣝ࢟ࣝ࢖࣑ࢲࢰࣜ
࣒࢘ࢳ࢜ࢩ࢔ࢼࢺ࡟⁐ゎࡋ㸪UV-Vis-NIR ࢫ࣌ࢡࢺࣝࢆ ᐃࡋࡓࠋศග≉ᛶࡢẚ㍑ࡢࡓࡵ࡟ࢸ
ࢺࣛࣄࢻࣟࣇࣛࣥ(THF)㸪1,4-ࢪ࢜࢟ࢧࣥ࡜࠸ࡗࡓ᭷ᶵ⁐፹࡟ࡘ࠸࡚ࡶྠᵝࡢヨ㦂ࢆ⾜࡞ࡗࡓࠋ㻌䛆⤖ᯝ䛇5fЍ5f 㑄⛣ࡀ 1,4-ࢪ࢜࢟ࢧࣥ୰࡛ 6,000-10,000 cm-1 ࡟㸪5f2Ѝ5f16d1 㑄⛣ࡀ 16,000-37,000
cm-1 ࡟ほ ࡉࢀࡓࠋࡉࡽ࡟㸪5fЍ5f 㑄⛣ࡣ࢖࢜ࣥᾮయ୰࡛ࡣࡼࡾ㧗࢚ࢿࣝࢠ࣮ഃ࡟ࡲ࡛ศᕸ
ࡋࡓࠋ᭷ᶵ⁐፹୰࡜࢖࢜ࣥᾮయ୰࡛ࡢ㓄఩⎔ቃࡀ␗࡞ࡾ㸪≉࡟㸪࢖࢜ࣥᾮయ୰࡛ࡣ㟁Ꮚࢫ࣌ࢡࢺࣝࡀᗈ⠊ᅖ࡟ศᕸࡍࡿ࡜⪃࠼ࡽࢀࡿࠋ᫬㛫ศゎⓎගࢫ࣌ࢡࢺࣝ࡟ࡼࡾ㸪4 ౯㘒యࡢⓎගᑑ࿨ࡣࢪ࢜࢟ࢧࣥ୰࡛ 12. 8 ns㸪࢖࢜ࣥᾮయ୰࡛ࡣ 18.6 ns ࡜࡞ࡾ㸪1.5 ಸ⛬ᗘ㛗ࡃ࡞ࡗ࡚࠸ࡿ
ࡇ࡜࠿ࡽࡶ㸪Ⓨග‽఩࡜ᇶᗏ≧ែࡢ࢚ࢿࣝࢠ࣮‽఩࡟࠾ࡅࡿᕪࡢቑ኱ࡀ♧၀ࡉࢀࡿࠋࡇࡢᅄ
ࣁࣟࢤࣥ໬࢘ࣛࣥࢆฟⓎ≀㉁࡜ࡋ࡚㸪໬Ꮫ㔞ㄽⓗ࡟ຍ࠼ࡓ KSCN ࠾ࡼࡧ[Cnmim]Cl㸦1-࣓ࢳࣝ-3-࢔ࣝ࢟ࣝ࢖࣑ࢲࢰ࣒ࣜ࢘ࢡࣟࣜࢻ㸧ࢆ஝⇱࣭⬺Ẽࡋࡓ࢔ࢭࢺࢽࢺࣜࣝ୰࡛᧠ᢾࡋ㸪࣓ࣥࣈࣛࣥࣇ࢕ࣝࢱ࣮࡛ᅛᾮศ㞳ᚋ㸪ࢁᾮࢆ␃ศ㝖ཤࡋ㸪⥳Ⰽࡢ┠ⓗ≀[Cnmim]4[U(NCS)8]ࢆᚓࡓࠋ
⣸እග↷ᑕୗ࡟࠾࠸࡚ࡇࡢ≀㉁ࡣⓑⰍⓎගࢆ♧ࡋࡓࠋ᫬㛫ศゎศගࢫ࣌ࢡࢺࣝ ᐃ⤖ᯝ࡛ࡣ
᪤㏙ࡢ UX4 ࢆ 1-࣓ࢳࣝ-3-࢔ࣝ࢟ࣝ࢖࣑ࢲࢰ࣒ࣜ࢘ࢳ࢜ࢩ࢔ࢼࢺ࡟⁐ゎࡋࡓࡶࡢ࡜ྠᵝࡢᙧ≧࡛࠶ࡗࡓࠋᮏⓎ⾲࡛ࡣศග ᐃࡢヲ⣽ࢆ㏙࡭ࡿࠋ࠙ཧ⪃ᩥ⊩ࠚ
[1] K. Takao, et al. (2013) Inorg. Chem. 52, 3459-3472.
[2] N. Aoyagi, et al. (2011) Chem. Commun. 47, 4490-4492.
[3] N. Aoyagi, et al. J. Radioanal. Nucl. Chem., accepted.
Synthesis and spectroscopic properties of uranium-containing ionic liquids,
AOYAGI, N., WATANABE, M., KIMURA, T., KIRISHIMA, A., SATO, S.

- 77 -

2B07ᐦᗘỗ㛵ᩘἲࢆ⏝࠸ࡓ࣐࢖ࢼ࣮࢔ࢡࢳࣀ࢖ࢻࡢ㑅ᢥⓗศ㞳࡟ᑐࡍࡿィ⟬໬Ꮫⓗ࢔ࣉ࣮ࣟࢳ
ᗈᓥ኱㝔⌮ ࠊᗈᓥ኱ N-BARD ‫ۑ‬㔠Ꮚᨻᚿ ࠊᐑୗ┤ ࠊ୰ᓥぬ ࠙⥴ゝࠚ౑⏝῭ࡳ᰾⇞ᩱࡢ෌ฎ⌮ࣉࣟࢭࢫ࡟ࡼࡾ⏕ࡌࡿ㧗ࣞ࣋ࣝᾮయᨺᑕᛶᗫᲠ≀(HLLW)ࡢฎ⌮ࡀ኱ࡁ࡞ㄢ㢟࡜࡞ࡗ࡚࠸ࡿࠋHLLW ୰࡟ྵࡲࢀࡿ Am, Cm ࡞࡝ࡢ࣐࢖ࢼ࣮࢔ࢡࢳࣀ࢖
ࢻ(MA)࡜ࣛࣥࢱࣀ࢖ࢻ(Ln)ࡢศ㞳ᣲືࢆグ㏙ࡍࡿ࠺࠼࡛ࠊ㔞Ꮚ໬Ꮫィ⟬ࡣ㠀ᖖ࡟ᙉຊ࡞ࢶ࣮
࡛ࣝ࠶ࡿࠋᡃࠎࡣࡇࢀࡲ࡛࡟ 151Eu, 237Np ࣓ࢫࣂ࢘࢔࣮␗ᛶయࢩࣇࢺ(δ)ᐇ㦂್࡜ࠊࢫ࣮࢝ࣛ┦ᑐㄽ(ZORA)ᐦᗘỗ㛵ᩘィ⟬࡜ࡢ࣋ࣥࢳ࣐࣮ࢡ◊✲࡟ࡼࡗ࡚ࠊB2PLYP ỗ㛵ᩘࡀ Eu, Np 㘒యࡢ⤖ྜ≧ែࢆ⢭☜࡟෌⌧ࡍࡿࡇ࡜ࢆ♧ࡋࡓ[1]ࠋࡇࡢ⌮ㄽࢆ⏝࠸࡚ࠊᢳฟ㓄఩Ꮚ Cyanex-272, -301ࢆ⏝࠸ࡓ MA/Ln ศ㞳ᣲື࡟ᑐࡍࡿィ⟬໬Ꮫⓗ࢔ࣉ࣮ࣟࢳࢆ⾜ࡗࡓࠋ࠙ィ⟬ࠚ඲࡚ࡢ DFT ィ⟬ࡣࣉࣟࢢ࣒ࣛ ORCA[2]࡟ࡼࡗ࡚⾜ࡗࡓࠋ┦ᑐㄽຠᯝࡣ ZORA ࣁ࣑ࣝࢺࢽ࢔ࣥࠊࢫࣆࣥ㌶㐨┦஫స⏝࣏ࢸࣥࢩࣕࣝ࡟ࡼࡗ࡚⪃៖ࡋࠊ┦ᑐㄽⓗ࡟⦰⣙ࡋࡓ඲㟁Ꮚᇶᗏ㛵ᩘ࡛࠶ࡿ SARC ᇶᗏࢆ඲ඖ⣲࡟๭ࡾᙜ࡚ࡓࠋᵓ㐀᭱㐺໬ࡣ BP86 ỗ㛵ᩘࠊ୍Ⅼィ⟬࡟ࡣ
B2PLYP ỗ㛵ᩘࢆ⏝࠸ࡓࠋCyanex-272, -301 ࡢࣔࢹࣝ㓄఩Ꮚ࡟ࡣࡑࢀࡒࢀࢪ࣓ࢳࣝ࣍ࢫࣇ࢕ࣥ
㓟(Me2PO2H)ࠊࢪ࣓ࢳࣝࢪࢳ࢜࣍ࢫࣇ࢕ࣥ㓟(Me2PS2H)ࢆ⏝࠸ࠊML3 (M = SmIII, EuIII, AmIII, CmIII;
L㸫 = [(Me2PO2)2H]㸫, [Me2PS2]㸫)࡟ᑐࡋ࡚ィ⟬ࢆ⾜ࡗࡓࠋ࠙⤖ᯝ࡜⪃ᐹࠚࡲࡎ᭱㐺໬ᵓ㐀ࡢ㔠ᒓ-㓄఩Ꮚ㊥㞳ࢆᐇ㦂್࡜ẚ㍑ࡋࡓ⤖ᯝ(⾲)ࠊSm, Cm 㘒యࡢ⤖ྜ㊥㞳ࢆࡼࡃ෌⌧ࡋࡓࠋࡲࡓࠊ[M(H2O)9]3+ + 3L㸫 Ѝ ML3 + 9H2O ࡢ㘒ᙧᡂ཯ᛂࢆ⪃៖ࡋࠊ
୍Ⅼィ⟬࡟ࡼࡿ㘒ᙧᡂ࣏ࢸࣥࢩ࢚ࣕࣝࢿࣝࢠ࣮࡜⁐፹ᢳฟᐇ㦂࡟ࡼࡿࢠࣈࢫ࢚ࢿࣝࢠ࣮[3]ࡢ
ࣉࣟࢵࢺࢆ⾜ࡗࡓ࡜ࡇࢁ(ᅗ)ࠊࡼ࠸┦㛵ࡀᚓ⾲ Sm, Cm 㘒యࡢ⤖ྜ㊥㞳ࡢẚ㍑ࡽࢀࡓࠋࡇࢀࡣࠊMA / Ln ศ㞳ࡢ㉳※ࡀ㘒ᙧ
Cyanex-272

Metal

Cyanex-301

Calc.

Exp.[3]

Calc.

Exp.[3]

Sm3+

2.33

2.30

2.83

2.80

3+

2.35

2.32

2.83

2.83

-2000

-1900

Cm

Experimental ΔGex / kJ mol-1ᡂࡢ㑅ᢥᛶ࡟࠶ࡿࡇ࡜ࢆ♧၀ࡋ࡚࠸ࡿࠋࡲࡓࠊ
Eu / Am ࡢ㘒ᙧᡂ࣏ࢸࣥࢩࣕࣝࢆẚ㍑ࡍࡿ࡜
Cyanex-272 㘒 య ࡛ ࡑ ࢀ ࡒ ࢀ 㸫 2129.5 / 㸫
2114.3 kJ mol-1 ࡛࠶ࡾࠊEu 㘒యࡢ᪉ࡀ㘒ᙧᡂࡋࡸࡍ࠸ࡢ࡟ᑐࡋࠊCyanex-301 㘒య࡛ࡣ㸫
1938.4 / 㸫2023.8 kJ mol-1 ࡜㏫㌿ࡋࡓࠋࡇࢀࡣࠊ
ཎᏊ౯ f 㟁Ꮚࡢ⤖ྜᛶ࡟ᑐࡍࡿ㛵୚ࡀ Eu ࡜ Am࡛␗࡞ࡿࡇ࡜ࡀཎᅉ࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋᮏⓎ⾲࡛ࡣࠊᐦᗘゎᯒࢆ⏝࠸࡚ࢫࣆࣥᐦᗘゎᯒ࠾ࡼࡧࠊ≧ែᐦᗘ࣭㔜࡞ࡾᐦᗘゎᯒ࡞࡝ࡢᡭἲࢆ⏝࠸࡚⤖ྜᛶ࡟ᑐࡍࡿヲ⣽࡞㆟ㄽࢆ⾜࠺ࠋ࠙ཧ⪃ᩥ⊩ࠚ[1] 㔠Ꮚࠊᐑୗࠊ୰ᓥࠊ➨ 51 ᅇ࢔࢖ࢯࢺ࣮ࣉ࣭ᨺᑕ⥺◊✲Ⓨ⾲఍ࠊ3p-VI-02(2014 ᖺ) [2] F. Neese, Program ORCA packagever. 3.0, 2013, University of Bonn, German. [3] M.
P. Jensen, A. H. Bond, J. Am. Chem. Soc., 2002,
124, 9870. [4] M. P. Jensen, A. H. Bond,Radiochim. Acta, 2002, 90, 205.

0
-10

R² = 0.923

-20
-30
-2200

-2100

Calculated ΔG ele / kJ mol-1

ᅗ ᢳฟᐇ㦂࡟ࡼࡿࢠࣈࢫ࢚ࢿࣝࢠ࣮[4]࡜
㘒ᙧᡂ࣏ࢸࣥࢩࣕࣝィ⟬್ࡢ┦㛵

Computational approach to the selective separation of minor actinides by means of density functional
theoryKANEKO, M., MIYASHITA, S., NAKASHIMA, S..

- 78 -

2B08-3$5&0/)$115,࡛ࡢ᰾ࢹ࣮ࢱ

ᐃ࡜ᨺᑕ໬ศᯒࡢ᥋ⅬཎᏊຊᶵᵓ  ‫ۑ‬ᮌᮧ ᩔ  䛆⥴ゝ䛇㻌 ᡃࠎࡢ◊✲ࢳ࣮࣒࡛ࡣࠊ኱ᙉᗘ㝧Ꮚຍ㏿ჾィ⏬(J-PARC)ࡢ≀㉁࣭⏕࿨⛉Ꮫᐇ㦂᪋タ(MLF)࡟࠾࠸࡚ࠊ୰ᛶᏊ᰾཯ᛂ ᐃ⿦⨨㸦ANNRI㸧ࡢᩚഛࢆᐇ᪋ࡋࠊ࣐࢖ࢼ࣮࢔ࢡࢳࣀ࢖ࢻ
㸦MA㸧࡜㛗ᑑ࿨᰾ศ⿣⏕ᡂ≀㸦LLFP㸧ࡢ୰ᛶᏊᤕ⋓཯ᛂ᩿㠃✚ ᐃཬࡧ༶ⓎȚ⥺ࢆ⏝࠸ࡓᚤ㔞ศᯒࢆᐇ᪋ࡋ࡚࠸ࡿࠋ
୰ᛶᏊᤕ⋓཯ᛂ᩿㠃✚ ᐃ࡛ࡣ୰ᛶᏊᤕ⋓཯ᛂ࡟ࡼࡾⓎ⏕ࡍࡿ༶ⓎȚ⥺ࢆ ᐃࡍࡿࠋ༶ⓎȚ⥺ࡢ࢝࢘ࣥࢺᩘࡣ୰ᛶᏊᤕ⋓཯ᛂ᩿㠃✚࡜≀㉁㔞ࠊ᳨ฟჾࡢ᳨ฟຠ⋡ࡢ✚ࡀ ᐃࡉࢀࡿࡓ
ࡵࠊ୰ᛶᏊᤕ⋓཯ᛂ᩿㠃✚

ᐃ࡜༶ⓎȚ⥺ศᯒࡣᑐ㇟࡜ࡍࡿ≀⌮㔞ࡀ␗࡞ࡿࡔࡅ࡛ࠊ ᐃࡢᡭ㡰ࡸᡭἲ࡞࡝࡛ඹ㏻ࡍࡿⅬࡀከ࠸ࠋࡑࡇ࡛ࠊᮏⓎ⾲࡛ࡣ ANNRI ࡟タ⨨ࡋࡓᐇ㦂⿦⨨ࡢᴫせࡸࠊ᩿㠃✚ ᐃࡢ౛ࠊ᩿㠃✚ ᐃࡢഃ࠿ࡽぢࡓ༶ⓎȚ⥺ศᯒ࡜ࡢඹ㏻Ⅼཬࡧ㐪࠸࡟ࡘ࠸࡚ሗ࿌ࢆ⾜࠺ࠋ䛆㻭㻺㻺㻾㻵 䛾ᴫせ䛇 ANNRI ࡟ࡣከᩘࡢ Ge ᳨ฟჾ࠿ࡽ࡞ࡿࠕ኱ᆺ Ge ࢫ࣌ࢡࢺ࣓࣮ࣟࢱࠖࡀ୰
ᛶᏊ※࠿ࡽ 21.5m ࡢ఩⨨࡟タ⨨ࡉࢀ࡚࠾ࡾࠊ୰ᛶᏊᤕ⋓཯ᛂ࡟ࡼࡗ࡚Ⓨ⏕ࡍࡿ༶ⓎȚ⥺ࡢ࢚ࢿࣝࢠ࣮࡜୰ᛶᏊ㣕⾜᫬㛫ἲ࡟ࡼࡾ୰ᛶᏊࡢ࢚ࢿࣝࢠ࣮ࢆྠ᫬࡟ ᐃࡍࡿ஦ࡀฟ᮶ࡿࠋ㝧Ꮚࣅ࣮࣒ฟຊ 300 kW 㐠㌿᫬ࡢヨᩱ఩⨨࡟࠾ࡅࡿ୰ᛶᏊᙉᗘࡣ୰ᛶᏊ࢚ࢿࣝࢠ࣮1.5-25 meV ࡢ㡿ᇦ࡛ 1.2×107 n/s/cm2ࠊ0.9-1.1 keV ࡢ㡿ᇦ࡛ 1.8×106 n/s/cm2 ࡜࡞ࡗ࡚࠸ࡿࠋྠᵝࡢ⿦⨨ࡣࢫ࢖ࢫࡢḢᕞཎᏊ᰾◊✲ᶵᵓ㸦CERN㸧ࡸ⡿ᅜࡢࣟࢫ࢔ࣛࣔࢫᅜ❧◊✲ᡤ㸦LANL㸧࡟ࡶ࠶ࡿࡀࠊ
ANNRI ࡢヨᩱ఩⨨࡛ࡢ୰ᛶᏊᙉᗘࡣࡇࢀࡲ࡛ࡢୡ⏺᭱㧗ࡢ LANL ࡢ⿦⨨࡟ẚ㍑ࡋ࡚ࡶ⣙ 7 ಸᙉ࠸ࡓࡵᨺᑕᛶྠ఩ඖ⣲ࡢ᩿㠃✚ ᐃࡸᚤ㔞ศᯒࡀྍ⬟࡜࡞ࡿࠋࡲࡓࠊJ-PARC ࡣ 1MW ࡛ࡢ㐠㌿ࡀィ⏬ࡉࢀ࡚࠾ࡾࠊ୰ᛶᏊᙉᗘ
ࡢࡉࡽ࡞ࡿቑᙉࡀぢ㎸ࡲࢀࡿࠋ䛆᰾䝕䞊䝍 ᐃ䛾୍౛䛇㻌 $115, ࡟࠾ࡅࡿ୰ᛶᏊᤕ⋓཯ᛂ᩿㠃✚ ᐃࡢ୍౛࡜ࡋ࡚ࠊ244 Cm ヨᩱ㸦1.8 GBq, 0.6 mg㸧ࡢ ᐃ⤖ᯝࢆᅗ 1 ࡟♧ࡍࠋ1mg ௨ୗ࡛ 1.8GBq ࡜࠸࠺ᙉ࠸ẚᨺᑕ⬟ࢆᣢࡘヨᩱ࡛ࡶ 2~200 eV ࡢ⠊ᅖ࡛୰ᛶᏊ
ᤕ⋓཯ᛂ᩿㠃✚ࢆᑟฟ࡛ࡁࡓࠋ≉࡟
20 eV ௨ୗࡢඹ㬆࡟ࡘ࠸࡚ࡣୡ⏺࡛᭱ึ࡟ᚓࡽࢀࡓᐇ㦂್࡛࠶ࡿࠋ ࡇࡢ⤖ᯝࡣࠊANNRI ࢆ⏝࠸ࡿ஦࡟ࡼࡾࠊᨺᑕᛶྠ఩ඖ⣲ࡢ᩿㠃✚ ᐃࡸᚤ㔞ศᯒࡀྍ⬟࡛࠶ࡿ஦ࢆ♧ࡋ࡚࠸ࡿࠋᅗ 1 ᛶᏊᤕ⋓཯ᛂ᩿㠃✚
244

ᐃࡢ୍౛

Cm ࡢ୰ᛶᏊᤕ⋓཯ᛂ᩿㠃✚್ࠋ

ANNRI ࡛ࡢᐃ⤖ᯝ㸦㯮୸༳㸧ࢆホ౯್㸦JENDL-4.0ࠊ㉥⥺㸧ཬࡧ㐣ཤࡢᐇ㦂್㸦㟷୕ゅ༳㸧࡜ẚ㍑ࡋࡓ⤖ᯝࠋ

Relations between capture cross-section measurement and prompt gamma-ray analysis
KIMURA,A.
Kimura,A..

- 79 -

2B09㣕⾜᫬㛫ἲࢆ⏝࠸ࡓከ㔜༶Ⓨ࣐࢞ࣥ⥺ศᯒἲ㛤Ⓨࡢ⌧≧ཎᏊຊᶵᵓ ‫ ⸨ۑ‬ᬸ㍜䛆⥴ゝ䛇㻌 J-PARC ࡢ≀㉁࣭⏕࿨⛉Ꮫᐇ㦂᪋タ(MLF)ࡢ BL04 ࡟タ⨨ࡉࢀ࡚࠸ࡿ୰ᛶᏊ᰾཯ᛂ ᐃ⿦⨨㸦ANNRI㸧࡛ࡣࠊ༶Ⓨ࣐࢞ࣥ⥺ศᯒ(PGA)ࠊ᰾ࢹ࣮ࢱࠊᏱᐂ᰾≀⌮࡞࡝࡟㛵ࡍࡿᐇ㦂ࡀ⾜ࢃࢀ࡚࠸ࡿࠋMLF ࡛ࡣ኱ᙉᗘ㝧Ꮚຍ㏿ჾ࠿ࡽࡢࣃࣝࢫࣅ࣮࣒࡟ࡼࡾࠊ㧗ᙉᗘࡢࣃࣝࢫ୰ᛶ
Ꮚࡀᚓࡽࢀࡿࠋ༶Ⓨ࣐࢞ࣥ⥺ศᯒ࡛ࡣ୰ᛶᏊᤕ⋓཯ᛂ࡟ࡼࡗ࡚ᨺฟࡉࢀࡿ࣐࢞ࣥ⥺ࢆ ᐃࡍࡿࡀࠊཎᏊ᰾ࡢከࡃࡣ⇕እ୰ᛶᏊ࢚ࢿࣝࢠ࣮㡿ᇦ࡟ᅛ᭷ࡢඹ㬆ࢆᣢࡘࠋ㣕⾜᫬㛫ἲ(TOF)࡟ࡼ
ࡗ࡚ࣃࣝࢫ୰ᛶᏊࡢ࢚ࢿࣝࢠ࣮ࢆ ᐃࡋࠊඹ㬆࢚ࢿࣝࢠ࣮࡟┦ᙜࡍࡿ༶Ⓨ࣐࢞ࣥ⥺ࢫ࣌ࢡࢺࣝࢆゎᯒࡍࢀࡤࠊࣀ࢖ࢬ࡜࡞ࡿࣂࢵࢡࢢࣛ࢘ࣥࢻ࣐࢞ࣥ⥺࡟ẚ࡭࡚ᤕ⋓཯ᛂ࠿ࡽࡢ࣐࢞ࣥ⥺ࡀ┦ᑐⓗ࡟ᙉࡃ࡞ࡿࠋANNRI ࡛ࡣࡇࡢ TOF ࢆ PGA ࡟㐺⏝ࡋࡓศᯒἲࡢ◊✲㛤Ⓨࢆ⾜࡞ࡗ࡚࠸ࡿࠋANNRI ࡟タ⨨ࡉࢀ࡚࠸ࡿ⿦⨨ࡢ࠺ࡕ PGA ࡛⏝࠸ࡿ᳨ฟჾࡣࠊࣔࢹ࣮ࣞࢱ࠿ࡽ 21.5m
ࡢ఩⨨࡟タ⨨ࡉࢀ࡚࠾ࡾࠊ7 ࡘࡢ⤖ᬗ࠿ࡽᵓᡂࡉࢀࡿࢡࣛࢫࢱ࣮Ge ᳨ฟჾ 2 ྎࠊࢥ࢔࢟ࢩࣕ
ࣝᆺ Ge ᳨ฟჾ 8 ྎ࡜ࢥࣥࣉࢺࣥࢧࣉࣞࢵࢧ࣮⏝ࡢ BGO ᳨ฟჾ࠿ࡽᵓᡂࡉࢀ࡚࠸ࡿࠋANNRI
࡛ࡣ」ᩘྎࡢ Ge ᳨ฟჾ࡟ࡼࡗ࡚ ᐃࢆ⾜࠺ࡓࡵࠊ༶Ⓨ࣐࢞ࣥ⥺ࡢྠ᫬ィᩘ ᐃ࡟ࡼࡗ࡚⏕ᡂࡉࢀࡿ MPGA ࢫ࣌ࢡࢺࣝࡶᚓࡽࢀࡿࠋࡲࡓࠊୖὶ㒊࡟ࡣࢲࣈࣝࢹ࢕ࢫࢡࢳࣙࢵࣃ࣮ࠊ࣮ࣟࢱ
࣮ࣜࢥ࣓࣮ࣜࢱࠊ; ࢫࢸ࣮ࢪࢥ࣓࣮ࣜࢱ࡞࡝ࡀタ⨨ࡉࢀ࡚࠾ࡾࠊࣂࢵࢡࢢࣛ࢘ࣥࢻࡢపῶࡸ
୰ᛶᏊࣅ࣮࣒ࢧ࢖ࢬ࠾ࡼࡧᙉᗘࢆኚ᭦ࡍࡿࡓࡵࡢᶵᵓࢆഛ࠼࡚࠸ࡿࠋ
䛆ศᯒἲ㛤Ⓨ䛇㻌 ᖹᡂ  ᖺᗘࡼࡾ 3*$ࠊ᰾ࢹ࣮ࢱࠊᏱᐂ᰾≀⌮ࡢศ㔝ᶓ᩿ⓗ࡞ࣉࣟࢪ࢙ࢡࢺ◊✲ࠕࣃࣝࢫ୰ᛶᏊ࡟ࡼࡿ୰ᛶᏊ᰾཯ᛂ◊✲ࠖࡀ᥇ᢥࡉࢀࠊ3 ศ㔝ࡢ◊✲⪅ࡢ༠ຊࡢࡶ࡜࡛◊✲㛤Ⓨࡀ᥎㐍ࡉࢀ࡚ࡁࡓࠋࡇࢀࡲ࡛࡟ᶆ‽ヨᩱࢆ⏝࠸ࡓ᳨ドᐇ㦂࡞࡝ࢆ⾜࠺࡜࡜ࡶ࡟ࠊゎᯒࢯࣇࢺ㛤Ⓨࡸࡑࢀ࡟⏝࠸ࡿࢹ࣮ࢱ࣮࣋ࢫࡢᩚഛࠊࣂࢵࢡࢢࣛ࢘ࣥࢻࢆపῶࡉࡏࡿࡓࡵࡢ㐽ⶸయࡢᨵⰋࠊࢧࣥࣉࣝࢳ࢙ࣥࢪ࣮ࣕࡢ㧗ᶵ⬟໬࡞࡝ࡶ⾜ࡗ࡚ࡁࡓࠋᅗ㸯࡟ ANNRI ࡢ Ge ᳨ฟჾࢆ⏝࠸ࡓᐇ㦂࡛ᚓࡽࢀࡓ Au ࠾ࡼࡧ Ag ヨᩱࡢ TOF ࢫ࣌ࢡࢺࣝࡢ౛ࢆ♧ࡍࠋAu ࠾ࡼࡧ Ag ࡣࡑࢀࡒࢀ 4.9eV ࡜ 5.2eV ࡟➨୍ඹ㬆ࢆᣢࡘ
ࡀࠊTOF ࢫ࣌ࢡࢺࣝୖ࡛ࡑࢀࡽ࡟ᑐᛂࡍࡿࣆ࣮ࢡࡀほࡉࢀ࡚࠸ࡿࠋࡇࢀࡽࡢ༢ඖ⣲ヨᩱࡢ௚࡟ᶆ‽ヨᩱࡢᐃࡶ⾜࠸ࠊᚓࡽࢀ

ࡓࢫ࣌ࢡࢺࣝࢆゎᯒࡋ࡚ᚑ᮶ἲ࡜ࡢẚ㍑
ࢆ⾜ࡗ࡚࠸ࡿࠋ
ᮏⓎ⾲࡛ࡣ㣕⾜᫬㛫ἲࢆ⏝࠸ࡓከ㔜༶
Ⓨ࣐࢞ࣥ⥺ศᯒἲ㛤Ⓨࡢ≧ἣࡸ ANNRI ⿦⨨ࡢ㧗ᗘ໬࡟ࡘ࠸࡚㏙࡭ࡿ࡜࡜ࡶ࡟ࠊࡇࢀ
ࡲ࡛࡟ᚓࡽࢀࡓᐇ㦂⤖ᯝ➼࠿ࡽ᫂ࡽ࠿࡟
࡞ࡗࡓㄢ㢟࡜௒ᚋࡢᒎᮃ࡟ࡘ࠸࡚ࡶ㏙࡭ࡿࠋᮏ◊✲ࡣ⛉◊㈝ JSPS 㸦22750077㸧ࡢຓᡂࢆཷࡅࡓᡂᯝࢆྵࡴࠋ

ᅗ 1 ANNRI ࡛ᚓࡽࢀࡓ㣕⾜᫬㛫ࢫ࣌ࢡࢺࣝ

Current status of development of multiple prompt gamma-ray analysis with time-of-flight method
TOH, Y..

- 80 -

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J-PARC/MLF BL04 ANNRI ¢¡QRstuvghTwxy~¡±² Ge u³´µ¶·x¸xbqr¹º»¼lmz½§¾¿flm¤ÀÁbrq° bÂÃr­«~Ä`Å 100 mg ÆR­¢ghTÇx´lm¤ÀÁ~È&ÉÊ­ËÌ¤ÍÎ¢Ïr!%&$­~Ä Alfa Aesar ÐÑÒsÓÔÕy§Ö×oPd-Ag; 75:25, [«; 21.6 mg, Ød;
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1. H. Postma et al, J. Radioanal. Nucl. Chem., 248, 115-120, 2001.
2. K.Shibata et al, J. Nucl. Sci. Technol., 48, 1, 2011.
Elemental Analysis using Time of Flight-Multiple Prompt Gamma Ray Analysis Method on J-PARC
BL04 ANNRIMIURA, T.,EBIHARA, M., TOH Y., MATSUO, M., CHIBA, K., KIMURA, A., OURA, Y.,SHOZUGAWA, K.

- 81 -㻌㻌◊✲Ⓨ⾲せ᪨㻌㻌䝫䝇䝍䞊Ⓨ⾲㻌
㻌
P01䡚P54㻌
IB 㤋䝥䝺䝊䞁䝔䞊䝅䝵䞁㻌 䝇䝨䞊䝇㻌㻌

P01

104 ␒ඖ⣲ Rf ࡢྠ᪘ඖ⣲ ZrࠊHf ࡢ࣮࢟ࣞࢺ㓄఩Ꮚࢆ⏝࠸ࡓ⁐፹ᢳฟᣲືࡢ◊✲᪂₲኱㝔⮬↛ ࠊᮾ໭኱㟁Ꮚගࢭ ࠊ᪂₲኱⌮  ‫⏣ۑ‬୰ᙲ ࠊ኱Ụ୍ᘯ ࠊ⳥Ọⱥᑑ ࠊᚋ⸨┿୍ ࠊᕤ⸨ஂ᫛ D࠙⥴ゝࠚ ㉸㔜ඖ⣲࡛࠶ࡿࣛࢨ࣮࣍ࢪ࣒࢘ (Rf)ࡣ⌧ᅾࡲ࡛୺࡜ࡋ࡚ࣁࣟࢤࣥ໬≀࢖࢜ࣥ➼ࡢ↓ᶵ㓄఩Ꮚࢆ⏝࠸ࡓ໬Ꮫ◊✲ࡀ⾜ࢃࢀ࡚ࡁࡓࡀࠊ᭷ᶵ㓄఩Ꮚࢆ⏝࠸ࡓ໬Ꮫ◊✲ࡣ㠀ᖖ࡟ᑡ࡞࠸ࠋ
ࡑࡇ࡛ᮏ◊✲࡛ࡣ Rf ࡟㛵ࡋ࡚᭷ᶵ㓄఩Ꮚࢆ⏝࠸ࠊࡑࡢ㘒ᙧᡂ཯ᛂࢆㄪ࡭ࡿࡇ࡜ࢆ┠ⓗ࡜ࡋࡓࠋ௒ᅇࡣ㠀ᖖ࡟ᗈࡃ฼⏝ࡉࢀ࡚࠸ࡿ࣮࢟ࣞࢺᢳฟ๣ࡢ୍ࡘ࡛࠶ࡿࢸࣀ࢖ࣝࢺࣜࣇࣝ࢜ࣟ࢔
ࢭࢺࣥ (TTA)ࢆ⏝࠸ࠊRf ࡢྠ᪘ඖ⣲࡛࠶ࡿࢪࣝࢥࢽ࣒࢘ (Zr)ࠊࣁࣇࢽ࣒࢘ (Hf)ࡢ⁐፹ᢳฟᐇ㦂ࢆ⾜࠸ࠊRf ᐇ㦂࡟ྥࡅࡓᇶ♏ⓗ࡞ࢹ࣮ࢱࡢ཰㞟ࢆ⾜ࡗࡓࠋ࠙ᐇ㦂ࠚᮾ໭኱Ꮫࢧ࢖ࢡࣟࢺࣟࣥ࡟࡚ 89Y (p, 2n)ࠊ175Lu (p, n)཯ᛂ࡟ࡼࡗ࡚ 88Zr (T1/2 = 83.4 d)ࠊ
175
Hf (T1/2 = 70 d)ࢺ࣮ࣞࢧ࣮ࢆ〇㐀ࡋࠊ㝜࢖࢜ࣥ஺᥮ศ㞳࡟ࡼࡾ↓ᢸయࢺ࣮ࣞࢧ࣮ࢆㄪ〇ࡋࡓࠋ⢭〇ࡋࡓࢺ࣮ࣞࢧ࣮ࡣ 1 M ◪㓟⁐ᾮ࡟⁐ゎࡋࠊࢺ࣮ࣞࢧ࣮⁐ᾮ 1-2 μL ࢆྵࡴ 1 M ◪㓟⁐ᾮ600 μL ࡜ TTA-ࢺ࢚ࣝࣥ⁐ᾮ 600 μL ࢆ࣏ࣜࣉࣟࣆࣞࣥࢳ࣮ࣗࣈ࡛ΰྜࡋࠊ25 ºC ࡟タᐃࡋࡓᜏᵴ୰࡛᣺┞ࢆ⾜ࡗࡓࠋ30 ⛊㛫ࡢ㐲ᚰศ㞳ᚋࠊ୧┦ 420 μL ࡎࡘศྲྀࡋࠊࡑࢀࡒࢀ Ge ༙ᑟయ᳨ฟჾ࡟ࡼࡾ γ ⥺ࢆ ᐃࡋࠊศ㓄ẚ D ࢆồࡵࡓࠋ࠙⤖ᯝ࡜⪃ᐹࠚࡣࡌࡵ࡟ศ㓄ẚ D ࡢ᣺┞᫬㛫౫Ꮡᛶࢆㄪ࡭ࡓࠋ88Zrࠊ175Hf ࡟ᑐࡋࠊࡑࢀࡒࢀ
0.01 Mࠊ0.025 M ࡢ TTA-ࢺ࢚ࣝࣥ⁐ᾮࢆ⏝࠸࡚ 1 M ◪㓟⁐ᾮ࠿ࡽ⁐፹ᢳฟࢆ⾜ࡗࡓ࡜ࡇࢁࠊ
୧ඖ⣲࡜ࡶ 5 ᫬㛫⛬ᗘࡢ᣺┞᫬㛫࡛ศ㓄ẚࡀ୍ᐃ࡜࡞ࡗࡓࠋࡑࡢࡓࡵ௨㝆ࡢᐇ㦂࡛ࡣ 5 ᫬㛫ࡢ᣺┞᫬㛫࡛ᢳฟ᧯సࢆ⾜ࡗࡓࠋ88Zrࠊ175Hf ࡢ 1 M ◪㓟⁐ᾮ࠿ࡽࡢศ㓄ẚࡢ TTA ⃰ᗘ౫Ꮡᛶࢆᅗ 1 ࡟♧ࡍࠋ୍⯡࡟ Zr ࡜ Hf ࡢᢳฟᣲືࡣ㠀ᖖ࡟ఝ㏻ࡗ࡚࠸ࡿࡇ࡜ࡀ▱ࡽࢀ࡚࠸ࡿࡀࠊᮏ
ᐇ㦂ࡢ⤖ᯝ࡛ࡣศ㓄ẚࡀ 1 ᱆⛬ᗘ␗࡞ࡿ⤖ᯝࡀᚓࡽࢀࡓࠋࡑࡢࡓࡵࠊࡇࡢᢳฟ⣔࡟࠾࠸࡚ Rf
ࡀ࡝ࡢࡼ࠺࡞ᣲືࢆ♧ࡍ࠿࡟⯆࿡ࡀࡶࡓࢀ
ࡿࠋࡲࡓ 88Zr ࡛ࡣ TTA ⃰ᗘࡀ 310-3-310103
2
175
-2
-2
‫ە‬:88 Zr
M ࡢ⠊ᅖ࡛ࠊ Hf ࡛ࡣ 110 -510 M ࡢ
Slope = 3.3
102‫ڹ‬:175 Hf⠊ᅖ࡛Ⰻዲ࡞┤⥺㛵ಀࡀᚓࡽࢀࡓࠋ᭱ᑠ஧஌
ἲ࡟ࡼࡾࡑࡢഴࡁࢆồࡵࡿ࡜ࠊ88Zrࠊ175Hf ࡜
101ࡶഴࡁࡣ 3.3 ࡜࡞ࡗࡓࠋࡇࢀ࡟ࡼࡾ 1 M ◪㓟100⁐ᾮ୰ࡢ㔠ᒓ࢖࢜ࣥ࡟ TTA ࡀ 4 㓄఩ࡋࡓ㘒య࡛ࡣ࡞ࡃࠊຍỈศゎ࡟ࡼࡿỈ㓟໬≀࢖࢜
10-1
Slope = 3.3
ࣥࠊࡶࡋࡃࡣ◪㓟࢖࢜ࣥࡀ㔠ᒓ࢖࢜ࣥ࡟㓄఩-2
10 -3
ࡋࡓ㘒య࡟ TTA ࡀ㓄఩ࡋ࡚ᢳฟࡉࢀ࡚࠸ࡿ
10
10-2
10-1
100
࡜⪃࠼ࡽࢀࡿࠋウㄽ఍࡛ࡣỈ┦࡟㐣ሷ⣲㓟ࢆ[TTA]/M⏝࠸ࡓ⤖ᯝ࡜ྜࢃࡏ࡚ᢳฟ໬Ꮫ✀࡟ࡘ࠸࡚ᅗ 1.88Zrࠊ175Hf ࡢศ㓄ẚࡢ TTA ⃰ᗘ౫Ꮡᛶࡢ⪃ᐹࢆ⾜࠺ࠋ
Ỉ┦㸸1 M HNO3 ᭷ᶵ⁐፹:ࢺ࢚ࣝࣥ

Study on solvent extraction behavior of zirconium and hafnium as homologs of rutherfordium (element 104)
with chelate extractant
TANAKA, A., OOE, K., KIKUNAGA, H., GOTO, S., KUDO, H.

- 117 -

P02

 ␒ඖ⣲ 5I ᐇ㦂࡟ྥࡅࡓ⮬ືᢳฟ⿦⨨ࢆ⏝࠸ࡓ =U ࡜ +I ࡢᅛᾮᢳฟ
㜰኱㝔⌮ ࠊ㜰኱⌮ ࠊ㜰኱ 5, ࢭ ࠊ⌮◊ோ⛉ࢭ  ‫ۑ‬ᶓ໭༟ஓ ࠊᮌ㔝ឡᏊ ࠊ㔜Ἑඃ኱ ࠊ㇏ᮧᜨᝅ ࠊ୰ᮧᏹᖹ ࠊ➟ᯇⰋᓫ ࠊ㧗ᶫᡂே ࠊᏳ⏣ຬ㍤ ࠊྜྷᮧᓫ ࠊᑠ᳃᭷ᕼᏊ ࠊ⩚ሙᏹග ࠊ㔠㇂῟ᖹ ࠊ㯤᫂㍤ ࠊᮧୖᫀྐ ࠊ⠛ཎཌ 

Back extraction yield/%䛆⥴ゝ䛇㻌 ᮏ◊✲ࢢ࣮ࣝࣉ࡛ࡣ 104 ␒ඖ⣲ Rf ࡢᢳฟᖹ⾮ୗ࡛ࡢศ㓄ಀᩘ (Kd) ࢆྲྀᚓࡍࡿࡇ࡜
ࢆ┠ᣦࡋࠊᢳฟᣲືࡢ᫬㛫౫Ꮡᛶࢆྲྀᚓ࡛ࡁࡿࣂࢵࢳᆺᅛᾮᢳฟ⿦⨨ࡢ㛤Ⓨ࡜ྠ᪘ඖ⣲ࡢ Zr
࡜ Hf ࡢ TIOA/HCl ⣔ࡢᅛᾮᢳฟᐇ㦂ࢆ⾜ࡗ࡚ࡁࡓ 1ࠋࡋ࠿ࡋࠊ30 wt% TIOA ᶞ⬡࡟྾╔ࡋࡓ
Zr ࡜ Hf ࢆ㏫ᢳฟࡍࡿࡓࡵ࡟ 6 M HNO3/0.01 M HF ࢆ⏝࠸ࡿᚲせࡀ࠶ࡾࠊ10 ᅇ⛬ᗘࡲ࡛ࡋ࠿ྠ
ࡌᶞ⬡ࢆ⧞ࡾ㏉ࡋ౑⏝࡛ࡁ࡞࠸࡜࠸࠺ၥ㢟Ⅼࡀ࠶ࡗࡓࠋࡑࡇ࡛ᮏ◊✲࡛ࡣࠊᢳฟ๣ࢆ Aliquat
336 ࡟ኚ࠼࡚ᢳฟࢆ⾜࠸ࠊࡉࡽ࡟ 4 M HCl ࡛ࡢ㏫ᢳฟ⋡ࡸᶞ⬡ࡢ౑⏝ᅇᩘ࡟ࡘ࠸࡚ㄪ࡭ࡓࠋ
ࡲࡓࠊ኱㜰኱Ꮫ᰾≀⌮◊✲ࢭࣥࢱ࣮࡜⌮໬Ꮫ◊✲ᡤ࡟࡚ He/KCl ࢞ࢫࢪ࢙ࢵࢺᦙ㏦ࢩࢫࢸ࣒࡜
ࣂࢵࢳᆺᅛᾮᢳฟ⿦⨨ࢆ⏝࠸࡚㐃⥆࡛ Zr ࡜ Hf ࡢ࢜ࣥࣛ࢖ࣥᐇ㦂ࢆ⾜ࡗࡓࠋ䛆ᐇ㦂䛇㻌 Aliquat 336 ᶞ⬡ࡣ MCI GEL (CHP20/P30) ࡟ Aliquat 336 ࢆ྾╔ࡉࡏࡓࡶࡢࢆ⏝࠸ࡓࠋ࢜ࣇࣛ࢖ࣥᐇ㦂࡛ࡣ኱㜰኱Ꮫ᰾≀⌮◊✲ࢭࣥࢱ࣮࡟࡚ 89Y(p,2n)཯ᛂ࡜ natLu(p,xn)཯ᛂ࡟ࡼࡾ
〇㐀ࡋࡓ 88Zr ࡜ 175Hf ࢆ⢭〇ᚋ࡟౑⏝ࡋࡓࠋ28ࠊ35ࠊ48 wt% Aliquat 336 ᶞ⬡ࢆྵࡴࣂࢵࢳᆺ
ᅛᾮᢳฟ⿦⨨ࡢ཯ᛂᐜჾ࡟ 88Zr ࡜ 175Hf ࢆྵࡴࢺ࣮ࣞࢧ࣮⁐ᾮࢆ 0.04 mL ࢆຍ࠼ࠊὶ㏿ 0.84
mL/min ࡛ 10 M HCl ࢆ 15 s 㛫㏦ᾮࡋࠊ10 s 㛫᣺࡜࠺ࡋࡓᚋ࡟⁐ᾮࢆ✵ᅽ࡛⁐ฟࡉࡏࡓࠋࡑࡢ
ᚋࠊ4 M HCl ࢆ⣙ 0.25 mL ཯ᛂᐜჾ࡟㏦ᾮࡋࠊ᣺࡜࠺ࡋࠊ⁐ᾮࢆ✵ᅽ࡛ 10 s 㛫⁐ฟࡉࡏࡿ㏫
ᢳฟࢆ」ᩘᅇ⾜ࡗࡓࠋࡇࡢ᧯సࢆᩘᅇࡈ࡜࡟ RI ࢺ࣮ࣞࢧ࣮ࢆຍ࠼ࠊ102 ᅇ㐃⥆࡛⾜ࡗࡓࠋࡲࡓࠊ኱㜰኱Ꮫ᰾≀⌮◊✲ࢭࣥࢱ࣮࡟࡚ natSr(!,xn)཯ᛂ࡜ natYb(!,xn)཯ᛂ࡛〇㐀ࡋࡓ 89m,gZr ࡜
173
Hf, ⌮໬Ꮫ◊✲ᡤ࡟࡚ natGd(18O,xn)཯ᛂ࡛〇㐀ࡋࡓ 169Hf ࢆ⏝࠸ࡓ࢜ࣥࣛ࢖ࣥᐇ㦂ࢆ⾜ࡗࡓࠋ䛆⤖ᯝ䞉⪃ᐹ䛇㻌 Figure 1 ࡟ Zr ࡜ Hf ࢆ 4 M HCl ࡛㏫ᢳฟࡋࡓ࡜ࡁࡢ㏫ᢳฟ⋡࡜㏫ᢳฟᅇᩘ࡜ࡢ㛵ಀ
ࢆ♧ࡍࠋZr ࡣ 28 ࡜ 35 wt% Aliquat 336 ᶞ⬡࡛ࡣ 1 ᅇࡢ㏫ᢳฟ࡛⣙ 90%ࡀ㏫ᢳฟࡉࢀࠊ48 wt%࡛ࡣ
⣙ 50%ࡀ㏫ᢳฟࡉࢀࡓࠋࡲࡓࠊHf ࡛ࡣ 28 wt%࡛ࡣ 1 ᅇࡢ㏫ᢳฟ࡛⣙ 60%ࡀ㏫ᢳฟࡉࢀࠊAliquat 336
100⃰ᗘࡢቑຍ࡟క࠸ࠊ㏫ᢳฟ⋡ࡀపୗࡋ࡚࠸ࡿࠋࡇࢀࡽࡢ⤖Zr Hf
ᯝ࠿ࡽࠊZr ࡢ᪉ࡀ Hf ࡟ẚ࡭཯ᛂࡀ㏿࠸ࡇ࡜ࡀࢃ࠿ࡾࠊ2880
28 wt%
35 wt%
wt% Aliquat 336 ᶞ⬡࡛ࡣ 4 M HCl ࡛ 3 ᅇ㏫ᢳฟࢆ⾜࠺ࡇ60
48 wt%
࡜࡟ࡼࡾ Zr ࡜ Hf ࡣ࡯ࡰ඲㔞㏫ᢳฟࡉࢀࡿࡇ࡜ࡀ☜ㄆ࡛40ࡁࡓࠋࡑࡋ࡚ࠊࡇࡢ᮲௳࡛ࡢᶞ⬡ࡢ౑࠸ᅇࡋࡣ 100 ᅇ⛬
20ᗘྍ⬟࡛࠶ࡿࡇ࡜ࢆ☜ㄆࡋࡓࠋࡲࡓࠊ28 wt% Aliquat 336ᶞ⬡ࢆ⏝࠸ࡓ࢜ࣥࣛ࢖ࣥᐇ㦂࡛ Kd ࡢ᫬㛫౫Ꮡᛶࢆㄪ࡭ࠊ
0
0
1
2
3
4
5
ᚓࡽࢀࡓ Kd ࡣ࢜ࣇࣛ࢖࡛ࣥᚓࡽࢀࡓᖹ⾮฿㐩ୗ࡛ࡢ್
Number of back extraction࡜୍⮴ࡋࠊRf ࡢᐇ㦂᮲௳ࢆỴᐃࡍࡿࡇ࡜ࡀ࡛ࡁࡓࠋ
Figure 1: The Back extraction yields of(1) A. Kino et al., RIKEN Accel. Prog. Rep. 46, 241 (2013).
Zr and Hf from 28, 35, and 48 wt%
Aliquat 336 resin using 4 M HCl.

Solid-liquid extraction of Zr and Hf using automated solid-liquid extraction apparatus for element 104,
Rf, experiment
YOKOKITA, T., KINO, A., SHIGEKAWA, Y. TOYOMURA, K., NAKAMURA, K., KASAMATSU,
Y., TAKAHASHI, N. YASUDA, Y., YOSHIMURA, T., KOMORI, Y., HABA, H., KANAYA, J.,
HUANG, M., MURAKAMI, M., SHINOHARA, A.

- 118 -

P03

120 GeV, 400 MeV 㝧Ꮚ࡜ Y ࡟ࡼࡿ㍍᰾ࡢ᰾཯ᛂ᩿㠃✚ࡢ
1

2

3

ᐃ

4

ி኱ཎᏊ⅔ ࠊி኱㜵⅏◊ ࠊᮾ኱ࢱࣥࢹ࣒ຍ㏿ჾ ࠊ㧗࢚ࢿ◊ ࠊΎỈᘓタ 5ࠊ
JAEA6ࠊ࢔ࢺࢵࢡࢫ 7ࠊࣇ࢙࣑ࣝࣛ࣎ 8ࠊ㜰኱㝔⌮ 9ࠊ㜰኱᰾≀⌮◊✲ࢭࣥࢱ࣮
10

ࠊPurdue ኱ 11ࠊ࢝ࣜࣇ࢛ࣝࢽ࢔኱Ꮫࣂ࣮ࢡ࣮ࣞᰯ 12ࠊ⌮◊ 13 ‫ۑ‬ዟᮧៅኴ㑻 1ࠊ

㛵ᮏಇ 1ࠊඵᓥᾈ ࠊᯇᅄ㞝㥽 2ࠊᯇᓮᾈஅ 3ࠊᯇᮧᏹ 4ࠊ㇏⏣᫭ᘯ 4ࠊ኱▼᫭Ⴙ 5ࠊᯇ⏣つᏹ 6ࠊ᫓᪥஭ዲᕫ 6ࠊᆏᮏᖾኵ 7ࠊ୰ᓥᏹ 6ࠊD. Boehnlein8, R. Coleman8, G. Lauten8, A. Leveling8, N.
Mokhov8, E. Ramberg8, A. Soha8, K. Vaziri8, ஧ᐑ࿴ᙪ 9ࠊᔱ㐩ᚿ 10ࠊ㧗ᶫᡂே 9ࠊ⠛ཎཌ 9ࠊM. W.
Caffee11ࠊすἨ㑥ᙪ 12ࠊᰘ⏣ㄔ୍ 13ࠊ኱ᵳ໅ 1ࡢ᰾཯ᛂ᩿㠃✚ࢆᶆⓗ᰾ࡢ㉁㔞ᩘ࡟ᑐࡋ࡚ࣉࣟࢵࢺࡋࡓ(Fig.1)ࠋ↷ᑕ࢚ࢿࣝࢠ࣮ࡀ 400 MeV ࡢሙྜࠊ㉁㔞
ᩘࡀᑠࡉ࠸㡿ᇦ࡛ࡣࠊᶆⓗ᰾ࡢ㉁㔞ᩘࡀ኱ࡁࡃ࡞ࡿ࡟
ࡘࢀ࡚཯ᛂ᩿㠃✚ࡣῶᑡࡍࡿࡀࠊᶆⓗ᰾ࡢ㉁㔞ᩘࡀ 80⛬ᗘ௨ୖ࡟࡞ࡿ࡜ࠊ཯ᛂ᩿㠃✚ࡀᶆⓗ᰾ࡢ㉁㔞ᩘࡢቑຍ࡜࡜ࡶ࡟኱ࡁࡃ࡞ࡿഴྥࡀ♧၀ࡉࢀࡓࠋⓎ⾲᫬࡟ࡣྛ↷ᑕ࢚ࢿࣝࢠ࣮࡟࠾ࡅࡿࠊ10Be, 26Al ࡢ⏕ᡂ᩿㠃✚࡜ᶆⓗ᰾ࡢ㉁㔞ᩘ࡜ࡢ㛵ಀ࡟ࡘ࠸࡚ヲ⣽࡟㆟ㄽࡍࡿࠋ

Cross section [mb]࠙⥴ゝࠚຍ㏿ჾ㉁㔞ศᯒἲ(AMS)ࡣࠊ⪃ྂᏛศ㔝࡟࠾ࡅࡿ㦵ࡸ⾰᭹ࡢᖺ௦ ᐃࠊᆅ⌫໬Ꮫศ㔝࡟࠾ࡅࡿἙᕝࡢᾐ㣗㏿ᗘㄪᰝ࡞࡝ࠊᵝࠎ࡞ศ㔝࡛⏝࠸ࡽࢀ࡚࠸ࡿࠋࡲࡓ AMS ࡣࡑࡢ ᐃ⢭ᗘࡢⰋࡉ࠿ࡽࠊ᰾ࢹ࣮ࢱศ㔝࡟࠾ࡅࡿᏱᐂ⥺⏕ᡂ᰾✀(10Be, 26Al, 36Cl ࡞࡝)ࡢ⏕ᡂ᩿㠃✚ࡢᐃ࡟ࡶ᭷ຠ࡟฼⏝ࡉࢀ࡚࠸ࡿࠋᮏ◊✲࡛ࡣࠊAMS ࢆ⏝࠸࡚ࠊࡇࢀࡲ࡛ ᐃࢹ࣮ࢱࡀ࡞࠸࢚ࢿ
ࣝࢠ࣮㡿ᇦ࡟࠾ࡅࡿࠊ୰㔜᰾ࢆᶆⓗ᰾࡜ࡋࡓ㍍᰾ࡢ㝧Ꮚㄏ㉳᰾཯ᛂ᩿㠃✚ࢆ ᐃࡋࡓࡢ࡛ࠊ
ࡑࡢ⤖ᯝࢆሗ࿌ࡍࡿࠋ
࠙ᐇ㦂ࠚ 400 MeV, 120 GeV 㝧Ꮚ↷ᑕࡣࡑࢀࡒࢀ኱㜰኱Ꮫ᰾≀⌮◊✲ࢭࣥࢱ࣮ࡢࣜࣥࢢࢧ࢖ࢡ
ࣟࢺࣟࣥࠊ⡿ᅜࣇ࢙࣑ࣝᅜ❧ຍ㏿ჾ◊✲ᡤࡢ Meson test ࣅ࣮࣒ࣛ࢖ࣥ࡟࠾࠸࡚⾜ࡗࡓࠋ㝧Ꮚ↷ᑕᚋࡢ Y, Tb ࢱ࣮ࢤࢵࢺ࡟ࠊBe, Al ࢟ࣕࣜ࢔ࢆῧຍࡋࠊ◪㓟࡛⁐ゎࡋࠊࢩࣗ࢘㓟ሷ࡜ࡋ࡚Y, Tb ࢆỿẊ㝖ཤࡋࡓࠋ㝧࢖࢜ࣥ஺᥮ἲ࡛┠ⓗ࢖࢜ࣥࢆ༢㞳ࡋࠊỿẊἲ࡛ᚓࡓỈ㓟໬≀ࢆࠊ㟁Ꮚࣞࣥࢪᆣላ࠶ࡿ࠸ࡣࠊ㟁Ẽ⅔࡛ࡑࢀࡒࢀ㓟໬≀࡟↝ᡂࡋࡓࠋAMS ⏝࢝ࢯ࣮ࢻ࡟ࣉࣞࢫࡋࠊ
ᮾி኱Ꮫࢱࣥࢹ࣒ຍ㏿ჾ◊✲᪋タ࡟࠾࠸࡚ 10Be-, 26Al-AMS ࡟౪ࡋࡓࠋ ᐃ⤖ᯝ࠿ࡽ 10Be, 26Al
ࢆᐃ㔞ࡋࠊ89Y(p, x)10Be (Ep= 400 MeV, 120 GeV), 159Tb(p,x)10Be (Ep= 400 MeV)ࡢ᰾཯ᛂ᩿㠃✚ࢆ⟬ฟࡋࡓࠋ
102
10࠙⤖ᯝࠚ ᮏ◊✲ࡢ⤖ᯝ࡜ᩥ⊩್[1-3]ࢆ⏝࠸࡚ࠊ Be
1
10

100
10-1
10-2
10-3
0

This work(400 MeV)This work(120 GeV)
400s20 MeV[1,2]
12 GeV[3]100200Target Mass
10

Fig.1. Cross section of Be
as a function of target mass number࠙ཧ⪃ᩥ⊩ࠚ [1] R. Michel et al., Nucl. Instrum. Methods B 129, 153 (1997). [2] Th. Schiekel et al.,Nucl. Instrum. Methods B 114, 91 (1996). [3] S. Shibata et al., Phys. Rev. C 48, 2617 (1993). 
Measurements of cross sections for production of light nuclides by 120 GeV and 400 MeV proton
bombardment of Y
OKUMURA, S., SEKIMOTO, S., YASHIMA, H., MATSUSHI, Y., MATSUZAKI, H.,
MATSUMURA, H., TOYODA, A., OISHI, K., MATSUDA, N., KASUGAI, Y., SAKAMOTO, Y.,
NAKASHIMA, H., BOEHNLEIN , D., COLEMAN, R., LAUTEN, G., LEVELING, A., MOKHOV,N., RAMBERG, E., SOHA, A., VAZIRI, K., NINOMIYA, K., SHIMA, T., TAKAHASHI, N.,
SHINOHARA, A., CAFFEE, M, W., NISHIIZUMI, K., SHIBATA, S., OHTSUKI, T.

- 119 -

P04

%L&O ࡢ➼࢞ࢫࢡ࣐ࣟࢺࢢࣛࣇ࢕ᣲື࡟㛵ࡍࡿ◊✲᪂₲኱㝔⮬↛ ᪂₲኱⌮  ‫ۑ‬ὸ஭㈗⿱ ᚋ⸨┿୍ ኱Ụ୍ᘯ ᕤ⸨ஂ᫛ 䛆⥴ゝ䛇㻌 ㉸㔜ඖ⣲ࡢ໬Ꮫ◊✲࡟࠾࠸࡚➼ ࢞ࢫࢡ࣐ࣟࢺࢢࣛࣇ࢕ࡣ᥹Ⓨᛶ໬ྜ≀ࡢ྾╔࢚ࣥࢱࣝࣆ࣮ΔHads ࢆồࡵࡿᡭἲ࡜ࡋ࡚ࡼࡃ฼⏝ࡉࢀ࡚࠾ࡾከࡃࡢሙྜࣔࣥࢸ࢝ࣝࣟἲ࡟ࡼࡿゎᯒࡀ⾜ࢃࢀ࡚࠸ࡿࠋࡋ࠿ࡋࠊࢩ࣑࣮ࣗࣞࢩࣙࣥ࡟᥇⏝ࡍࡿᐇ㦂᮲௳࡟㛵ࢃࡿࣃ࣓࣮ࣛࢱࡢ୙☜ᐇࡉࢆぢ✚ࡶࡿࡇ࡜ࡣᅔ㞴࡛࠶ࡿࡓࡵࠊᚓࡽࢀࡓ྾╔࢚ࣥࢱࣝࣆ࣮ࡢṇ☜ᗘ࡟ࡘ࠸࡚ホ౯ࢆࡍࡿࡇ࡜ࡀồࡵࡽࢀ࡚࠸ࡿࠋࡑࡇ࡛ᮏ◊✲࡛ࡣࠊኳ↛ᨺᑕቯኚ⣔ิ୰ࡢ᰾✀࡜ࡋ࡚⡆౽࡟ᡭ࡟ධࢀࡽࢀࡿ 212Bi ࢆࢺ࣮ࣞࢧ࣮࡟⏝࠸࡚ࠊẚ㍑ⓗ᥹Ⓨᛶࡢ㧗࠸ BiCl3 ࡢ➼ ࢞ࢫࢡ࣐ࣟࢺ
ࢢࣛࣇ࢕ᣲືࢆᐇ㦂⿦⨨ࡢ㍑ṇ࡟฼⏝ࡍࡿᡭἲࢆ᳨ウࡋࡓࠋ䛆ᐇ㦂䛇㻌 ࣐ࢡࣟ㔞࡛ࡢᐇ㦂ࢆ⾜࠺࡟ᙜࡓࡗ࡚ࠊሷ⣲ࡸሷ໬Ỉ⣲࡜࠸ࡗࡓྲྀᢅ࠸࡟༴㝤ࢆక࠺ሷ⣲໬๣ࢆ⏝࠸ࡎࠊሷ໬≀ࢆ┤᥋᥹Ⓨࡉࡏࡿࡇ࡜࡜ࡋࡓࠋࡋ࠿ࡋࠊሷ໬ࣅࢫ࣐ࢫ BiCl3 ࡟ࡣ₻ゎᛶࡀ࠶ࡾࠊࡲࡓࠊỈ࿴Ỉࡀࡘ࠸ࡓ≧ែ཯ᛂ㒊ᤕ 㞟㒊 ࢞ ࣛࢫ
෭༷㒊

⇕㟁ᑐ

3XP S

࡛ᛴ⃭࡟ຍ⇕ࡍࡿ࡜୙᥹Ⓨᛶࡢሷ໬㓟໬ࣅ
ࢫ࣐ࢫ BiOCl ࡀ⏕ᡂࡍࡿࠋࡑࡇ࡛ࠊࡲࡎࠊ

+H
ᗫᲠ⏝࢞ࣛࢫ⟶ᕷ㈍ࡢሷ໬ࣅࢫ࣐ࢫࢆ⏝࠸࡚ࠊຍ⇕࡟ࡼࡾሷ໬≀ࡀ᥹Ⓨࡍࡿ࠿࡝࠺࠿ࢆ☜ㄆࡋࡓࠋᐇ㦂⿦/LT 1 ⨨ࡢࢭࢵࢺ࢔ࢵࣉࢆ Fig.1 ࡟♧ࡍࠋHe ࢞ࢫࢆ

Fig.1 ᐇ㦂⿦⨨ࡢࢭࢵࢺ࢔ࢵࣉ

ὶ㔞 0.8 L/min ࡛ὶࡋࠊ࣏ࣥࣉࡢ᤼Ẽࢆㄪ⠇ࡍࡿࡇ࡜࡛ෆ㒊ᅽຊࢆ 101 kPa ࡜ࡋࡓࠋBiCl37.6 mg ࢆワࡵࡓ࢞ࣛࢫ⟶ࢆ཯ᛂ㒊࡟ධࢀࠊ100 °C
࡛ 1 ᫬㛫஝⇱ࡉࡏࡓࠋࡑࡢᚋࠊ཯ᛂ㒊ࡢ ᗘࢆ 500 °C ࡟タᐃࡋࠊ1,2,4,6,8,10 ศẖ࡟཯ᛂ㒊࠿
ࡽ᥹Ⓨࡋࡓᡂศࢆᤕ㞟ࡋࡓࠋ᭱ึࡢ 1 ศࡢࡳᗫᲠ⏝࢞ࣛࢫ⟶࡟ᤕ㞟ࡋࡓࠋᤕ㞟ࡋࡓ BiCl3 ࢆ 2
M HCl ࡟⁐ゎࡋࠊࢳ࢜ᒀ⣲ࢆ⏝࠸ࡓࣅࢫ࣐ࢫ㘒య࡟ࡼࡿẚⰍᐃ㔞ࢆ⾜ࡗࡓࠋᗘୖ᪼࡟క࠸᥹Ⓨࡋࡓ
2600

㞟㛤ጞᚋ 1㹼3 ศ⛬ᗘࡢ㛫࡟ᤕ㞟㔞ࡀ᭱኱࡜࡞ࡗࡓࠋ

1.5

500
Bi
Temp. 400

᥹Ⓨࡋጞࡵࡿ ᗘࡣ⣙ 250 °C ⛬ᗘ࡛࠶ࡿࡇ࡜ࡀࢃ
࠿ࡗࡓࠋࡲࡓࠊ཯ᛂ㒊࡟ṧࡗࡓ %L ࡣ࡯࡜ࢇ࡝࡞ࡃࠊ
୙᥹Ⓨᛶሷ໬㓟໬≀ࡢ⏕ᡂࢆᢚไ࡛ࡁࡓࠋ௨ୖࡢ⤖ᯝ࠿ࡽࡇࡢ⿦⨨࡟➼㒊ࢆ᥋⥆ࡋ୍࡚ᐃ᫬㛫࡛࢝

࣒ࣛࢆ㏻㐣ࡍࡿ᥹Ⓨᛶ໬ྜ≀ࡢ๭ྜࢆㄪ࡭ࡿࡇ࡜

Bi/mgᡂศ୰࡟ྵࡲࢀࡿ Bi ࡢ㔞ࢆ♧ࡋࡓࡶࡢ࡛࠶ࡿࠋᤕ

1

300
200

0.5
0

100
2

4
6
8
Elapsed time/min10࡛㸪࣒࢝ࣛ࡜ࡢ྾⬺╔ᣲືࢆㄪ࡭ࡿࡇ࡜ࡀ࡛ࡁࡿࠋ    Fig.2 ᤕ㞟㔞ࡢ᫬㛫ኚ໬
ㅮ₇࡛ࡣࡉࡽ࡟ヲ⣽࡞ᐇ㦂⤖ᯝ࡟ࡘ࠸࡚ሗ࿌ࡍࡿࠋ

Isothermal chromatographic behavior of BiCl3
ASAI, T., GOTO, S., OOE, K., KUDO, H.

- 120 -

0Temperture/ Υ䛆⤖ᯝ䛇㻌 Fig.2 ࡣ཯ᛂ㒊ࡢ

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}æ?@[7]$,ÅÆÖ!ð»J678Âñòó¦(2008 D 7 ô 31 °õöJ}÷ÅÆ)>?\ø>ºn“experimental demonstration”IÇn$lGL!ùú>ºn 3 ¥¦<J§L}û?!
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[2] K. Morita, K. Morimoto, D. Kaji et al., JPSJ 76, 045001(2007).
[3] K. Morita, K. Morimoto, D. Kaji et al., JPSJ 81, 103201(2012).
[4] P. A. Wilk et al., PRL 85, 2697 (2000).
[5] Z. Qin et al., Nucl. Phys. Rev. 23, 400 (2006).
[6] R. C. Barber et al., Pure Appl. Chem. 83, 1485 (2011).
[7] K. Morita, K. Morimoto, D. Kaji et al., JPSJ 78,064201(2009).

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0࡛ࡣప࠸್ࢆ♧ࡋࡓࠋ>8`a=bA;S ࢥ࣮ࢻNSO࡟ࡼࡿ⌮,ㄽィ⟬ࡣࣆ࣮ࢡ㏆ഐ࡟࠾࠸࡚ప࠸್ࢆ♧ࡍࡀࠊᴫࡡ
,
/,
0,
1,
2,
3,
-,
!56"7#89:;.;!;7<=.&>;?*
ᐇ㦂್ࢆ෌⌧ࡋ࡚࠸ࡿࠋ ᐃࡋࡓ᩿㠃✚࡟ᇶ࡙࠸࡚
)ぢ✚ࡶࡗࡓ CB;H)5/W ࡲ࡛ࡢ✚⟬཰㔞ࡣ C;H)U<cGY8.
ᅗ A;)(&%0*123"4AJH>& ཯ᛂࡢບ㉳㛵ᩘࠋ)࡛࠶ࡗࡓࠋ)
䛆ཧ⪃ᩥ⊩䛇㻌 )/40@7ABB.B;9#8A!.&CD*!"#

NAO)5;)5+-&U&Z$)/%)&d;3)8LLd;)7&M$&%;):,'%;)!"3)ASF)1HBAS4;) )NHO)5;)5+-&U&Z$)/%)&d;3)7:9!e)8##/d;)f-'g;)7/L;)#$3)$()L-/,,;) )NVO)[;)>T-UT(K$)/%)&d;3)8LLd;)7&M$&%;):,'%;)!%3)AAS)1HBAS4;) )NSO)8;)h;)9'($(g)/%)&d;3)$()f-'#//M$(g,)'*)%./):(%/-(&%$'(&d)Q'(*/-/(#/)'()e+#d/&-)?&%&)*'-)=#$/(#/)&(M)>/#.('d'gK3)/M$%/M)DK)@;)</-,$dd'()/%)&d;)1!?f)=#$/(#/,3)HBBJ4)L;)HAA;) )!"#$%&%$'()*+(#%$'(,)*'-)%./)(&%0*123"4)-/&#%$'(,)
5678985:3)5;3)08<83)0;3)=0:<8>83)=;3)96?@3)0;)- 122 -

P07

natMo(d,x)཯ᛂ࡟ࡼࡿ Tc ྠ఩యࡢ⏕ᡂ᩿㠃✚⌮◊ோ⛉ࢭ ࠊ᪂₲኱㝔⮬↛



ᐃ



‫ۑ‬ᑠ᳃᭷ᕼᏊ ࠊᮧୖᫀྐ ࠊ⩚ሙᏹග ࠊᰘ⏣ㄔ୍ 
࠙⥴ゝࠚᡃࠎࡢࢢ࣮ࣝࣉ࡛ࡣ㸪Tc ࠾ࡼࡧ Re ࡢᢸయ↓ῧຍ RI ࢺ࣮ࣞࢧ࣮ࢆ〇㐀ࡋ࡚ 107 ␒ඖ⣲࣮࣒࣎ࣜ࢘(Bh)ࡢ໬Ꮫ◊✲࡟ྥࡅࡓᇶ♏ᐇ㦂ࢆ⾜࠺ࡇ࡜ࢆィ⏬ࡋ࡚࠸ࡿ㸬ᮏ◊✲࡛ࡣ㸪௒ᚋ Tc ࡢ RI ࢺ࣮ࣞࢧ࣮㸪≉࡟༙ῶᮇࡀ㛗ࡃࢺ࣮ࣞࢧ࣮ᐇ㦂࡟฼⏝ࡋࡸࡍ࠸ 95mTc (T1/2 = 61 d)ࢆᐃ㔞ⓗ࡟〇㐀ࡋ࡚࠸ࡃࡓࡵ㸪natMo(d,x)཯ᛂ࡟ࡼࡾ⏕ᡂࡍࡿ Tc ྠ఩యࡢບ㉳㛵ᩘࢆࢫࢱࢵࢡ
ࣇ࢛࢖ࣝἲ࡟ࡼࡾ

ᐃࡋࡓ㸬ᚓࡽࢀࡓ⤖ᯝࢆඛ⾜◊✲ࡢࢹ࣮ࢱࡸ⌮ㄽィ⟬ࢥ࣮ࢻࡢ್࡜ẚ㍑

ࡋࡓࡢ࡛ሗ࿌ࡍࡿ㸬࠙ᐇ㦂ࠚᐇ㦂ࡣ⌮◊ AVF ࢧ࢖ࢡࣟࢺࣟࣥࢆ⏝࠸࡚⾜ࡗࡓ㸬ኳ↛ྠ఩య⤌ᡂࡢ Mo ⟩㸦⣧ᗘ 99.95%㸪
ཌࡉ 20.9 mg/cm2㸧17 ᯛ㸪Ti ⟩㸦99.5%㸪9.2 mg/cm2㸧
16 ᯛ㸪Ta ⟩㸦99.95%㸪16.1 mg/cm2㸧16 ᯛ࠿ࡽᡂࡿ
ࢱ࣮ࢤࢵࢺࢫࢱࢵࢡ࡟ 24 MeV ࡢ㔜㝧Ꮚࣅ࣮࣒ࢆ 1᫬㛫↷ᑕࡋࡓ㸬Ti ⟩ࡣ natTi(d,x)48V ཯ᛂ࡟ࡼࡾ㔜㝧

Cross section [mb]80࡟⏝࠸ࡓ㸬ᖹᆒࡢࣅ࣮࣒㟁ὶࡣ 0.17 μA ࡛࠶ࡗࡓ㸬↷ᑕᚋ㸪ྛࢱ࣮ࢤࢵࢺ⟩࡟ࡘ࠸࡚ Ge ᳨ฟჾࢆ⏝࠸ࡓ γ ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺ࣮ࣜࢆ⾜࠸㸪natMo(d,x)཯
ᛂ࡛⏕ᡂࡋࡓ Tc㸪Mo㸪Nb ཬࡧ Zr ྠ఩యࡢ཯ᛂ
᩿㠃✚ࢆồࡵࡓ㸬࠙⤖ᯝ࡜⪃ᐹࠚᮏ◊✲࡛ࡣ㸪natMo(d,x)཯ᛂ࡟ࡼࡾ⏕ ᡂ ࡍ ࡿ93m,99,101

93m,93g,94m,94g,95m,95g,96m,96g,97m,99m,101

Tc 㸪Mo㸪90g,92m,95m,95g,96gNb㸪89gZr ࡢບ㉳㛵ᩘࢆᐃࡍࡿࡇ ࡜ࡀ࡛ࡁ ࡓ㸬 ⤖ᯝࡢ୍ ౛࡜ࡋ࡚ 㸪Mo(d,x)95mTc ཯ᛂࡢບ㉳㛵ᩘࢆᅗ 1 ࡟♧ࡍ㸬ᮏ◊nat✲࡛ᚓࡽࢀࡓ 95mTc ࡢບ㉳㛵ᩘࡣඛ⾜◊✲[1‒3]ࡢ

60
95

40

Mo(d,2n)97

Mo(d,4n)20

94

Mo(d,n)96

Mo(d,3n)10
20Deuteron energy [MeV]30ᅗ 1. natMo(d,x)95mTc ཯ᛂࡢບ㉳㛵ᩘ㸬103
Thick-target yield [MBq/!A࣭h]࡟㸪Ta ⟩ࡣ㔜㝧Ꮚࡢ࢚ࢿࣝࢠ࣮ࢆῶ⾶ࡉࡏࡿࡓࡵ

Mo(d,x)95mTc

00Ꮚࡢࣅ࣮࣒ᙉᗘ࡜ධᑕ࢚ࢿࣝࢠ࣮ࢆᰯṇࡍࡿࡓࡵThis work
Tarkanyi et al. (2012)
Lebeda et al. (2010)
Sheng et al. (1990)
TENDL-2013

nat

10

2

10

1

101

94m

Tc

93g

Tc

Tc

95g

99m

Tc

96g
93m

100
10

96m

94g

-1

Tc

Tc

Tc

Tc

Tc

95m

Tc

97m

Tc

10-2
10-3
10-4
0

4

8
12 16 20 24
Deuteron energy [MeV]28⤖ᯝ࡜ㄗᕪ⠊ᅖෆ୍࡛⮴ࡋ࡚࠸ࡿ㸬୍᪉㸪⌮ㄽィ

ᅗ 2. ⏕ᡂ᩿㠃✚࠿ࡽồࡵࡓ Tc ྠ఩యࡢ⟬ࢥ࣮ࢻ TALYS [4]ࡣ㸪 10 MeV ௨ୖࡢ㡿ᇦ࡟࠾࠸

Thick-target yield㸦1 μA ࡛ 1 ᫬㛫↷ᑕᚋ࡚ natMo(d,x)95mTc ཯ᛂࡢ᩿㠃✚ࢆ㐣ᑠホ౯ࡍࡿࡇ࡜

ࡢ⏕ᡂᨺᑕ⬟㸧㸬ࡀࢃ࠿ࡗࡓ㸬ᚓࡽࢀࡓ⏕ᡂ᩿㠃✚࠿ࡽぢ✚ࡗࡓ Tc ྠ఩యࡢ Thick-target yield ࢆᅗ 2 ࡟♧ࡍ㸬23.7 MeV ࡛ࡢ 95mTc ࡢ཰⋡ࡣ 0.35 MBq/μA∙h ࡛࠶ࡿࡇ࡜ࡀࢃ࠿ࡗࡓ㸬[1] W. Sheng et al., Inst. Nucl. Sci. Technol. Sichuan Univ. Rep., NST-004 (1990).
[2] O. Lebeda et al., Appl. Radiat. Isot. 68, 2425 (2010).
[3] F. Tárkányi et al., Nucl. Instrum. Meth. B 274, 1 (2012).
[4] A. J. Koning et al., TENDL-2013: TALYS-based Evaluated Nuclear Data Library, 2013.
Measurement of production cross sections of Tc isotopes in the natMo(d,x) reactions
KOMORI, Y., MURAKAMI, M., HABA, H., SHIBATA, S.

- 123 -

P08

2IIOLQH ᐇ㦂࡟࠾ࡅࡿ =U+I ሷ໬≀ࡢ➼࢞ࢫࢡ࣐ࣟࢺࢢࣛࣇ࢕ᣲື

᪂₲኱㝔⮬↛ ࠊ᪂₲኱⌮  ‫ۑ‬ᢲぢྜྷᡂ ࠊᚋ⸨┿୍ ࠊ኱Ụ୍ᘯ ࠊᕤ⸨ஂ᫛ 䛆⥴ゝ䛇 104 ␒ඖ⣲ Rf ࡢ໬Ꮫⓗᛶ㉁ࢆ᫂ࡽ࠿࡟ࡍࡿࡓࡵ࡟ࠊࡇࢀࡲ࡛ Rf ࠾ࡼࡧྠ᪘ඖ⣲࡛࠶ࡿ Zr, Hf ࡢሷ໬≀࡟ᑐࡍࡿ➼ ࢞ࢫࢡ࣐ࣟࢺࢢࣛࣇ࢕ᐇ㦂ࡀ Kadhodayan ࡽࡸ Türler ࡽ࡟ࡼࡗ࡚⾜ࢃࢀࡓ[1,2]ࠋࡑࡢ⤖ᯝࠊZr, Hf, Rf ሷ໬≀ࡢ྾╔࢚ࣥࢱࣝࣆ࣮ΔHa ࢆࡑࢀࡒࢀ–74 ± 5, –96 ±5, –77 ± 6 kJ/mol ࡜ồࡵࠊ᥹Ⓨᛶࡢᗎิࢆ ZrCl4 ‫ ذ‬RfCl4 > HfCl4 ࡜ࡋࡓࠋࡋ࠿ࡋࠊZrCl4 ࡜ HfCl4
ࡢ᥹Ⓨᛶࡢ㛵ಀࡀ࣐ࢡࣟ㔞࡟࠾ࡅࡿ⵨Ẽᅽ᭤⥺ࡢ㛵ಀ[3]࡜␗࡞ࡾࠊࡇࡢࡇ࡜࡟ࡘ࠸࡚ጇᙜ࡞
ㄝ᫂ࡀ࡞ࡉࢀ࡚࠸࡞࠸ࠋᮏⓎ⾲࡛ࡣࠊ࣐ࢡࣟ㔞ࡢ Zr, Hf ሷ໬≀࠾ࡼࡧࢺ࣮ࣞࢧ࣮ࢆ⏝࠸ࡓᐇ㦂ࡢ➼ ࢞ࢫࢡ࣐ࣟࢺࢢࣛࣇ࢕ᣲື࡟ࡘ࠸࡚㆟ㄽࡍࡿࠋ䛆ᐇ㦂䛇 Zr ࠾ࡼࡧ Hf ࡢᅄሷ໬≀ࡣ✵Ẽ୰ࡢỈศ࡟ࡼࡾຍỈศゎࢆ㉳ࡇࡍࡓࡵࠊᐃ㔞ⓗ࡟ྲྀࡾᢅ࠺ࡇ࡜ࡀᅔ㞴࡛࠶ࡿࠋࡑࡇ࡛ࠊ࣐ࢡࣟࢫࢣ࣮ࣝࡢᐇ㦂࡛ࡣࠊZr ࠾ࡼࡧ Hf ࡢሷ໬㓟໬≀ࡢ⇕ศゎ཯ᛂ࡟ࡼࡗ࡚ሷ໬≀ࢆ⏕ᡂࡋࡓࠋHe Ẽὶ࡟ࡼࡗ࡚ᦙ㏦ࡉࢀࡓሷ໬≀ࡣ➼ ࣒࢝ࣛࢆ㏻
㐣ࡋࡓᚋࠊỈ෭༷ᤕ㞟㒊࡟୍࡚ᐃ᫬㛫ᤕ㞟ࡉࢀࡓࠋᤕ㞟ࡉࢀࡓ Zr ࠾ࡼࡧ Hf ࡢᐃ㔞ࡣࠊ࢔ࣝࢭࢼࢰϪࢆ⏝࠸ࡓ྾ගගᗘἲ࡟࡚⾜ࡗࡓࠋ➼ ࣒࢝ࣛ ᗘࡣ 70̿450 Υࡢ⠊ᅖ࡛ኚ໬ࡉࡏࡓࠋ
ḟ࡟ࠊୖグࡢᐇ㦂࡟࠾࠸࡚ࠊ᥹Ⓨᛶ໬ྜ≀ࡢ➼ ࣒࢝ࣛ࡜ࡢ྾⬺╔ᣲືࡀࠊẼ┦໬Ꮫ୍࡛⯡ⓗ࡟⏝࠸ࡽࢀࡿ྾╔ࣔࢹࣝ࡟ᚑࡗ࡚࠸ࡿࡢ࠿ࢆヲ⣽࡟ㄪᰝࡍࡿࡓࡵࠊࢺ࣮ࣞࢧ࣮ࢆ⏝࠸࡚
࣒࢝ࣛࢆ㏻㐣ࡍࡿ᥹Ⓨᛶ໬ྜ≀ࡢ㔞ࡢ᫬㛫ኚ໬ࢆ
ࡼࡿ࡜ࠊ➼

࣒࢝ࣛࡀప

ᐃࡍࡿᐇ㦂ࢆ⾜࠺ࡇ࡜࡜ࡋࡓࠋࣔࢹࣝ࡟

ᗘࡢሙྜࠊ᥹Ⓨᛶ໬ྜ≀ࡣ➼࣒࢝ࣛ⾲㠃࡜ࡢ྾⬺╔࡟᫬㛫ࡀ࠿

࠿ࡿⅭࠊࡺࡗࡃࡾ࡜࣒࢝ࣛࢆ㏻㐣ࡍࡿࡣࡎ࡛࠶ࡿࠋ
100ࡋ࠿ࡋࠊࢺ࣮ࣞࢧ࣮ࢆ࣐ࢡࣟ㔞ࡢሷ໬㓟໬≀࡜༢⣧㔞ࡢᡂศ࡜ࡣ␗࡞ࡿᣲືࢆྲྀࡿ࡞࡝ࡢၥ㢟Ⅼࡀ࠶ࡿⅭࠊ㓟໬≀ࢆᅄሷ໬Ⅳ⣲࡛ሷ⣲໬[4]ࡍࡿࡇ࡜࡛ሷ໬
≀ࢆ⏕ᡂࡋࡓࠋ

Relative yield / %࡟ΰྜࡋ࡚⇕ศゎ཯ᛂࡉࡏ࡚ࡶࢺ࣮ࣞࢧ࣮ࡀ࣐ࢡࣟ

80
60
40

䛆⤖ᯝ䛇 ࣐ࢡࣟࢫࢣ࣮ࣝ࡟࠾ࡅࡿ➼ ࣒࢝ࣛ ᗘ࡟: ZrCl4: HfCl420ᑐࡍࡿ཰⋡ࢆ Fig.1 ࡟♧ࡍࠋ᥹Ⓨᛶࡢ㡰␒ࡣ Hf ‫ ذ‬Zr࡜࡞ࡾࠊ⵨Ẽᅽ᭤⥺࠿ࡽ⪃࠼ࡽࢀࡿ㛵ಀ࡜୍⮴ࡋࡓࠋ
0
100
200
300
400
500
ࡲࡓࠊࢺ࣮ࣞࢧ࣮ࢆ⏝࠸ࡓ㓟໬≀ࡢሷ⣲໬ࡢຠ⋡ࡣࠊoIsothermal temperature / C
30 %๓ᚋ࡛࠶ࡗࡓࠋⓎ⾲࡛ࡣࠊࢺ࣮ࣞࢧ࣮ᐇ㦂ࡢ⤖ᯝࡶຍ࠼࡚ࡼࡾヲ⣽࡞ᐇ㦂࡜⤖ᯝ࡟ࡘ࠸࡚ሗ࿌ࡍࡿࠋ              
Fig.1 ࣐ࢡࣟࢫࢣ࣮ࣝᐇ㦂࡟࠾ࡅࡿ཰⋡᭤⥺                       [1] B. Kadkhodayan et al., Radiochim. Acta 72, 169 (1996)[2] A. Türler et al., J. Alloys Comp 271, 287 (1998)[3] O. Knacke, O. Kubaschewski, K. Hessemann, Eds., Thermochemical properties of inorganic substances II, Berlin,
Springer Verlag (1991)[4] W. S. Hummers, S. Y. Tyree, Jr., S. Yolles, ”Zirconium and Hafnium Tetrachlorides” in Inorganic Synthesis IV,
McGraw-Hill Book Company, Inc (1953)

Isothermal gas chromatographic behavior of Zr and Hf chlorides at off-line experiment
Oshimi, Y.Y.,, Goto,S., Ooe,K., Kudo,
H.
OSHIMI,GOTO,
S., OOE,
K., KUDO,
H.

- 124 -

P09

Sg ࡢྠ᪘ඖ⣲ Mo, W ࡢࢩࣗ࢘㓟Ỉ⁐ᾮ࠿ࡽࡢ࢖࢜ࣥᑐᢳฟᣲື
᪂₲኱㝔⮬↛ ࠊཎᏊຊᶵᵓ ࠊᗈᓥ኱㝔⌮ ࠊⲈᇛ኱㝔⌮ᕤ ࠊ㔠ἑ኱㝔⮬↛ ࠊ⌮◊ ࠊ᪂₲኱⌮  ‫ۑ‬ᚋ⸨ᑦဢ ࠊ኱Ụ୍ᘯ ࠊᮧୖᫀྐ ࠊᚋ⸨┿୍ ࠊሯ⏣࿴᫂ ࠊ㇏ᔱཌྐ ࠊὸ஭㞞ே ࠊబ⸨ဴஓ ࠊᐑୗ┤ ࠊ㔠㇂భு ࠊ
໭ᒣ㞝ኴ ࠊ⩚ሙᏹග ࠊᑠ᳃᭷ᕼᏊ ࠊᕤ⸨ஂ᫛ D䛆⥴ゝ䛇㻌 ᙜ◊✲ᐊ࡛ࡣ 06 ␒ඖ⣲ࢩ࣮࣮࣎ࢠ࣒࢘(Sg)ࡢ⁐ᾮ໬Ꮫᐇ㦂࡟ྥࡅ࡚ࠊྠ᪘ඖ⣲ࣔࣜࣈࢹࣥ(Mo)࡞ࡽࡧ࡟ࢱࣥࢢࢫࢸࣥ(W)ࢆ⏝࠸ࡓᇶ♏◊✲ࢆ㐍ࡵ࡚࠸ࡿࠋ໬Ꮫᐇ㦂࡟⏝࠸ࡽࢀࡿ265
Sg ࡣ༙ῶᮇࡀ⣙ 10 ⛊࡜▷࠸ࡇ࡜࠿ࡽࠊ㎿㏿࡞ᢳฟ⣔࡛ᐇ㦂ࢆ⾜࠺ᚲせࡀ࠶ࡿࠋࡇࢀࡲ࡛
࡟ Mo ࡞ࡽࡧ࡟ W ࡢᨺᑕᛶࢺ࣮ࣞࢧ࣮ࢆ⏝࠸࡚࠸ࡃࡘ࠿ࡢᢳฟ⣔ࢆㄪ࡭ࠊỈ┦࡟ࢩࣗ࢘㓟Ỉ⁐ᾮࠊ᭷ᶵ┦࡟ᅄ⣭࢔ࣥࣔࢽ࣒࢘ሷ Aliquat 336 ࢆ⁐ゎࡉࡏࡓࢺ࢚ࣝࣥ⁐ᾮࢆ⏝࠸ࡿࡇ࡜࡟ࡼ
ࡗ࡚ࠊ㎿㏿࡞ᢳฟࡀྍ⬟࡛࠶ࡿࡇ࡜ࡀ♧၀ࡉࢀࡓࠋࡑࡇ࡛ᮏ◊✲࡛ࡣࠊࡇࡢᢳฟ⣔࡟࠾ࡅࡿMo ࡜ W ࡢᢳฟᣲືࡢ᣺࡜࠺᫬㛫౫Ꮡᛶࡸᢳฟ๣⃰ᗘ౫Ꮡᛶ➼ࢆヲ⣽࡟ㄪ࡭ࡓࡢ࡛ሗ࿌ࡍࡿࠋ
䛆ᐇ㦂䛇㻌 ཎᏊຊᶵᵓࢱࣥࢹ࣒ຍ㏿ჾ᪋タ࡟࠾࠸࡚ࠊnatY(6Li, xn)࠾ࡼࡧ natLu(6Li, xn)཯ᛂ࡟ࡼࡾ
⏕ᡂࡋࡓ 93mMo(6.85 h)࡞ࡽࡧ࡟ 176W(2.5 h)ࢆ He/KCl ࢞ࢫࢪ࢙ࢵࢺࢩࢫࢸ࣒࡟ࡼࡾ໬Ꮫᐇ㦂ᐊ
࡟ᦙ㏦ࡋࠊPTFE 〇ࢩ࣮ࢺୖ࡟ᤕ㞟ࡋࡓࠋᦙ㏦≀ࢆ 700 μL ࡢ 0.01 M ࢩࣗ࢘㓟/0.1 M HCl/ 0.9 M
LiCl Ỉ⁐ᾮ࡟⁐ゎࡋࠊ➼㔞ࡢ Aliquat 336㸫ࢺ࢚ࣝࣥ⁐ᾮࢆຍ࠼୍࡚ᐃ᫬㛫᣺࡜࠺ᚋࠊ30 ⛊㛫㐲ᚰศ㞳ࢆ⾜ࡗࡓࠋࡑࡢᚋࠊ୧┦࠿ࡽ 500 μL ࡎࡘศྲྀࡋ࡚ࠊᨺᑕ⬟ࢆ ᐃࡋࠊศ㓄ẚ D ࢆ⟬ฟࡋࡓࠋศ㓄ẚࡣ᭷ᶵ┦࡜Ỉ┦୰ࡢᨺᑕ⬟ࡢẚ࡜ࡋ࡚ᐃ⩏ࡋࡓࠋW ࡟ࡘ࠸࡚ࡣ natTa(p, n)཯ᛂ࡟ࡼࡾ⏕ᡂࡋࡓ 181W ࢺ࣮ࣞࢧ࣮(121.2 d)ࢆ⏝࠸ࡓᐇ㦂ࡶ⾜ࡗࡓࠋ䛆⤖ᯝ䛇㻌 ศ㓄ẚࡢ᣺࡜࠺᫬㛫౫Ꮡᛶࢆㄪ࡭ࡓ⤖ᯝࠊMo, W ඹ࡟࠾ࡼࡑ 30 ⛊࠿ࡽ 1 ศ⛬ᗘ࡛ᖹ
⾮࡟฿㐩ࡋࠊ㎿㏿࡞ᢳฟࡀྍ⬟࡛࠶ࡿࡇ࡜ࡀศ࠿ࡗࡓࠋ௒ᚋࠊᙜ◊✲ᐊ࡛㛤Ⓨ୰ࡢ㎿㏿⁐፹ᢳฟ⿦⨨[1]ࢆ⏝࠸࡚᭦࡞ࡿ㎿㏿ᢳฟ
102
ࢆ᳨ウࡍࡿணᐃ࡛࠶ࡿࠋḟ࡟ࠊMo, Wࡢศ㓄ẚࡢ Aliquat 336 ⃰ᗘ౫Ꮡᛶࢆ
101-4
ᅗ 1 ࡟♧ࡍࠋMo ࡣ 10 M ௨ୗࡢ⃰ᗘ㡿ᇦ࡛ഴࡁ 2.1 ࡢ┤⥺ࢆ♧ࡋࠊW ࡣ 10-3
10093m
M ࡼࡾప࠸⃰ᗘ࡛ഴࡁ 1.3 ࡢ┤⥺ࢆ♧
Mo
176
-1
W
10
ࡋࡓࠋMo ࡜ W ࡣࢩࣗ࢘㓟Ỉ⁐ᾮ୰࡛
181
W
MO2(C2O4)22- (M = Mo, W)࡜ࡋ࡚Ꮡᅾ
10-2ࡍࡿ࡜ሗ࿌ࡉࢀ࡚࠾ࡾ[2, 3]ࠊᡃࠎࡢ
0.01M oxalic acid/0.1 M HCl/0.9 M LiCl-3
Mo ࡢࢹ࣮ࢱࡣࡇࢀࡽࡢሗ࿌࡟୍⮴ࡋ
10
10-5
10-4
10-3
10-2
10-1
࡚࠸ࡿࠋ୍᪉ࠊW ࡢࢹ࣮ࢱࡣᩥ⊩࡜ࡣ[Aliquat 336] / M␗࡞ࡾ㟁Ⲵ-2 ࡢ㘒యᙧᡂࢆ♧ࡋ࡚࠾ᅗ 1㸬Mo ࡜ W ࡢศ㓄ẚ(D)ࡢ Aliquat 336 ⃰ᗘ౫Ꮡᛶࠋ
ࡽࡎࠊ␗࡞ࡿ㘒యࢆᙧᡂࡋ࡚࠸ࡿྍ⬟ᛶࡀ࠶ࡿࠋ௒ᚋࠊW ࡢ㘒య࡟㛵ࡋ࡚ࡉࡽ࡟᳨ドࢆ㐍ࡵࡿணᐃ࡛࠶ࡿࠋ
[1]T. Koyama et al., 5th Asia-Pacific Symposium on Radiochemistry ʹ 13 (APSORC 13), 25NCP05.
[2]▮ࣨ㒊᠇ඣ㸪༡᫴୍㸪᪥ᮏ໬Ꮫ఍ㄅ㸪(1983)㸪1045.
[3]▮ࣨ㒊᠇ඣ㸪ᒾඖᾈ୍㸪༡᫴୍㸪᪥ᮏ໬Ꮫ఍ㄅ㸪(1985)㸪714.

Solvent extraction behavior of Mo and W from oxalic acid solution by Aliquat 336
GOTO, N., OOE, K., MURAKAMI, M., GOTO, S., TSUKADA, K., TOYOSHIMA, A., ASAI, M.,
SATO, T. K., MIYASHITA, S., KANEYA, Y., KITAYAMA, Y., HABA, H., KOMORI, Y., KUDO, H.

- 125 -

P10

8P ࡢ⬺ບ㉳㐣⛬ࡢ◊✲࡟ྥࡅࡓ཯㊴᰾ᤕ㞟⿦⨨ࡢ㛤Ⓨ㜰኱㝔⌮  ‫ۑ‬㔜Ἑඃ኱ ࠊ➟ᯇⰋᓫ ࠊ⠛ཎཌ 䛆⥴ゝ䛇 ࠕෆ㒊㌿᥮ࠖࡢࡼ࠺࡞ཎᏊ᰾࡜㌶㐨Ẇ㟁Ꮚࡢ┦஫స⏝ࢆక࠺᰾ቯኚ㐣⛬࡛ࡣࠊẆ㟁Ꮚࡢ≧ែ࡟౫Ꮡࡋ࡚᰾ቯኚࡢ☜⋡ࡀኚ໬ࡍࡿࡇ࡜ࡀᮇᚅࡉࢀࡿࠋ235mU ࡣ໬Ꮫ≧ែࡢኚ໬࡟కࡗ
࡚᭱኱࡛ 5 %⛬ᗘࡢ༙ῶᮇࡢኚ໬ࡀほ ࡉࢀࡓ᰾✀࡛࠶ࡿ[1]ࠋ235mU ࡣ 76.8 eV ࡜࠸࠺㠀ᖖ࡟ప࠸ບ㉳࢚ࢿࣝࢠ࣮ࢆᣢࡕࠊෆ㒊㌿᥮࡟ࡼࡗ࡚⬺ບ㉳ࡍࡿࠋෆ㒊㌿᥮࡟ᐤ୚࡛ࡁࡿࡢࡣእẆ㟁Ꮚࡢࡳ࡛࠶ࡾ໬Ꮫ≧ែࡀ᰾ቯኚࡢ☜⋡࡟ᙳ㡪ࢆ୚࠼ࡿࠋࡇࢀࡲ࡛࡟࠸ࡃࡘ࠿ࡢ໬Ꮫᙧ࡟ᑐ
ࡋ࡚༙ῶᮇࡢ ᐃࡀ⾜ࢃࢀ࡚࠸ࡿࡀࠊ⣔⤫ⓗ࡞⌮ゎ࡟ࡣ⮳ࡗ࡚࠸࡞࠸ࠋᮏ◊✲࡛ࡣࠊෆ㒊㌿᥮㟁Ꮚࡢ࢚ࢿࣝࢠ࣮ࢫ࣌ࢡࢺࣝࢆ ᐃࡍࡿࡇ࡜࡛࡝ࡢẆ㟁Ꮚࡀ࡝ࡢ⛬ᗘෆ㒊㌿᥮࡟ᐤ୚ࡍࡿ
࠿ࢆㄪ࡭ࠊ༙ῶᮇኚ໬࡜㌶㐨Ẇ㟁Ꮚࡢ≧ែࡢኚ໬ࡢ㛵ಀࢆヲ⣽࡟㆟ㄽࡍࡿࡇ࡜ࢆ┠ᶆ࡜ࡍࡿࠋ
235m
U ࡣ 239Pu ࡢ Ș ቯኚ࡟ࡼࡾ⏕ᡂࡍࡿࠋ௒ᅇࠊ239Pu ࠿ࡽ཯㊴࡟ࡼࡗ࡚㣕ࡧฟࡍ 235mU ࢆᤕ㞟ࡍࡿࡓࡵࡢ⿦⨨ࢆ〇సࡋࡓࠋࢸࢫࢺᐇ㦂࡜ࡋ࡚ࠊȘቯኚ࢚ࢿࣝࢠ࣮ࡀࡼࡃఝࡓ 228Th ࢆ⏝࠸࡚཯㊴⏕ᡂ≀ࡢ 224Ra ࢆᤕ㞟ࡋࠊᤕ㞟ຠ⋡ࢆồࡵࡿࡇ࡜࡛ࠊ཯㊴᰾ᤕ㞟⿦⨨ࡢᛶ⬟ホ౯ࢆ⾜ࡗࡓࠋ⌧ᅾࠊప࢚ࢿࣝࢠ࣮ෆ㒊㌿᥮㟁Ꮚࡢ࢚ࢿࣝࢠ࣮ࢫ࣌ࢡࢺࣝ ᐃ⿦⨨ࡢ㛤Ⓨࢆ㐍ࡵ࡚࠸ࡿࠋ
䛆ᐇ㦂䛇 ࡲࡎࠊ཯㊴᰾ᤕ㞟⿦⨨ࡢタィࠊ〇సࢆ⾜ࡗࡓࠋ228Th ヨᩱࡣࠊSm ࡜ࡢඹỿ࡟ࡼࡗ࡚ 3✀㢮㸦ȭ10, ȭ18 ࡢヨᩱ, ཌࡵࡢヨᩱ㸧సᡂࡋࠊ㟁╔࡟ࡼࡗ࡚ 3 ✀㢮㸦ȭ10 ࡢヨᩱ 2 ✀㢮, ࣂ࣮ࢼ࣮࡛ຍ⇕ࡋ࡚࠸࡞࠸ヨᩱ㸧 సᡂࡋࡓࠋ཯㊴᰾ᤕ㞟⿦⨨ࢆ⏝࠸࡚ 228Th㸦T1/2 = 1.913 y㸧࠿ࡽ཯㊴ࡋ࡚ࡃࡿ 224Ra㸦T 1/2 = 3.66 d㸧ࢆᤕ㞟ࡋࠊᤕ㞟ᯈࢆ Ș ⥺ ᐃࡋ࡚ᤕ㞟ຠ⋡ࢆồࡵࡓࠋ
228
Th ヨᩱࡢ✀㢮㸦6 ✀㢮㸧ࠊ⥺※࡜ᤕ㞟ᯈ㛫ࡢ㊥㞳㸦1.5 mm, 6 mm㸧
ࠊẼᅽ㸦N2 1 atm, ┿✵㸧ࠊ224⥺※࡜ᤕ㞟ᯈ㛫ࡢ༳ຍ㟁ᅽ㸦0~650 V㸧ࢆኚ໬ࡉࡏࠊᤕ㞟ຠ⋡ࡢኚ໬ࢆㄪ࡭ࡓࠋࡲࡓࠊ Raࢆᤕ㞟ࡋࡓᤕ㞟ᯈࢆ⁐ᾮ㸦Ỉ, 0.1 M HCl, ࣊ࣉࢱࣥ㸧࡛Ὑ࠸ࠊ⁐ᾮ໬ຠ⋡ࢆồࡵࡓࠋ䛆⤖ᯝ䛸⪃ᐹ䛇㻌 ┿✵୰࡛ᤕ㞟ࡋࡓሙྜࠊᤕ㞟ຠ⋡ࡣ㟁ᅽ࡟ࡼࡽࡎ୍ᐃ࡛࠶ࡿࡢ࡟ᑐࡋ࡚ࠊN2 1
atm ୰࡛ᤕ㞟ࡋࡓሙྜࠊ㟁ᅽࡢቑຍ࡟కࡗ࡚ᤕ㞟ຠ⋡ࡀቑຍࡋࠊ࠶ࡿ㟁ᅽ௨ୖ࡟࡞ࡿ࡜ᤕ㞟ຠ⋡ࡣ୍ᐃ࡜࡞ࡗࡓ㸦Fig. 1㸧ࠋᤕ㞟ຠ⋡ࡢ᭱኱್ࡣ⥺※ヨᩱࡢཌࡉ࡟኱ࡁࡃ౫Ꮡࡍࡿࡇ࡜ࡀ
ศ࠿ࡗࡓࠋ239Pu ヨᩱࡣ ȭ18ࠊཌࡉ 20 wg/cm2⛬ᗘ࡛సᡂࡍࡿࡇ࡜࡜ࡋࡓࠋࡑࡢ㝿ࡢᤕ㞟ຠ⋡ࡣ 10 %⛬ᗘ࡛࠶ࡿ࡜᥎ᐃࡉࢀࠊ30 ศࡢᤕ㞟࡛⣙ 6000 Bq ࡜㟁Ꮚ ᐃ࡟༑ศ࡞㔞ࡢ
235m
U ࡀᚓࡽࢀࡿ࡜ぢ✚ࡶࡿࡇ࡜ࡀ࡛ࡁࡓࠋ
⁐ᾮ໬ຠ⋡ࡣࠊN2 1atm ࡛ᤕ㞟ࡋࡓሙྜ࡛
● 6 mm, N2 1 atm●
100%࡟㏆ࡃࠊ┿✵࡛ᤕ㞟ࡋࡓሙྜࡣᤕ㞟ᯈ○○ 1.5 mm, N2 1 atm
ෆ㒊ࡲ࡛ 224Ra ࡀᡴࡕ㎸ࡲࢀࡿࡓࡵ 10㹼▲▲ 6 mm, vacuum
ᇞ 1.5 mm, vacuumᇞ20%⛬ᗘ࡜ప࠸್ࢆ♧ࡋࡓࠋN2 1atm ࡛ᤕ㞟ࡋࡓሙྜࡣ཯㊴᰾ࡀᤕ㞟ᯈ⾲㠃࡟Ꮡᅾࡋࠊ
ᐜ᫆࡟⁐ᾮ໬࡛ࡁࡿࡓࡵࠊ㎿㏿࡟໬Ꮫ≧ែࢆኚ࠼ࡿࡇ࡜ࡀ࡛ࡁࡿ࡜⪃࠼ࡽࢀࡿࠋ
Fig. 1 Collection efficiency of 224Ra from
[1] M. N. Mevergnies et al., Phys. Lett. 49B(5),precipitated 228Th source
428 (1974).
Development of a collection apparatus for recoil products toward the study of the deexcitation processof U-235m
SHIGEKAWA,
Y.,Y.KASAMATSU,
Y. SHIGEKAWA,KASAMATSU,Y.,
A. SHINOHARA,
SHINOHARA A.

- 126 -

P11

! "!"#$%&$'()*+,$-.
(!"!"# 1$%&'() 2$%&( 2$*+,-. 4) /01&2 1$3456 1$
789:$;%<= 1,2$>?@A 1,3$BCDE 4!
/0&1!
! FGHIJK$2 LMNOPQRSTUVWX(GARIS YZ[ GARIS-II)\]^_`abc
defGHghaijklmnop\qrs_^ctuv$defMαwxyfUz{|g}~_obcγ(X)\ c\s_$Si-Ge nop\gqrs
j( 1)t207,208Pb+48Ca hSgZ~_:c 253,255No \]^_-(X) \`^$
M\`~jtai_$206Pb+48Ca hSgZ~_:c 252No \]^_$
rfUzgc ¡jt
23! ¢£K¤(Ge¥¦§0¨p©ªJ`~
jt«¬­¢£®¯\°±g²tTarget: 530 µg/cm2 208Pb on 60 µg/cm2 C
Target: 371 µg/cm2 207Pb on 60 µg/cm2 C
Target: 353 µg/cm2 206Pb on 60 µg/cm2 C
Projectile: 218.5 MeV 48Ca11+ I = 0.86 pµA
Magnetic rigidity: 2.064 Tm for 253,254,255No
Filled gas: pure He at P = 73 Pa

6=&77!

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Counts!

45678!
!
α−γ(X) M³´s_$ 207Pb(48Ca,
 2 g²t2n)253No ¢£Jµ¶bj·¸\253
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sjtb¶K$½`GHJ¾¿b_^cÀÁÂÃÄÅÆÇÈ³És_^c[2]tÊg 208Pb(48Ca,xn)253,255No S:ËMUÌÍgÎsjt0.86 pµA ^Ï&ÐÑe¥¦ÒÆÓÔÕ¢£gÖÖa¶×ØÙÚÛÜÝ¦ÞJM ÍßJàjÖ¶$¶ge^defáM]ßâãJàct0ä_$206
Pb(48Ca,2n)252No S:ËMrfUzg}~_obcγM Ö¶ÒÆÓ¹å{|fUz{|\æçcjèMéê
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Eγ [keV] !

 2. (a) α-γ MòóôéêÚõYZ[ (b) γÂÃÄÅÆöáM÷ø[1]t97:;!
[1] D. Kaji, K. Morimoto et al., Contribution to Advances in Radioactive Isotope Science (ARIS2014).
[2] F. P. Heßberger et al., Eur. Phys. J. A48, 75 (2012).

R&D of focal plane detector for superheavy element study
KAJI, D., MORIMOTO, K., WAKABAYASHI, Y., TAKEYAMA, M., TOKANAI, F., ASAI, M.

- 127 -

P12

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zq~&~&~MUO?U&BqlSJ[PQUstx?lp;?yzC&PQBx8W[\?]y[&M E¡;wx8FGHIJKLMB>?PQl E¢£;¤¥q&PQlst¦§¨KB©
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PQÈ: 300~400 µg/cm2
ÉMÊË: 120 MeV 23Na7+, 125 MeV 27Al8+M E¡: ÌÍÎ¤²(Ï) IN5-L+,-./01%!
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150
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100
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0
0 1 2 3 4 5 6 7 8 9 10Úæ?yzçÜp}@]~º~MBTime [s]?st+O&cdrSl~B?stçèxx?éUÜp}@]Á 2. ÒÓ»¼½[ 209Bi PQ; 271pnA! 4êë[C&8FGHIJKLMB>?P
125 MeV 23Na7+IJK[LMq@ÔlPQl E¾¿B©xìíq&~º~º~M;îq@~¡ïRðñòJRóHB Ql Eýþ]}st¦§¨K;ôõ>?]lö÷B+O&uvPQB´k@ø¸l%ùúJP
Ql ID ¿lû§úJRSTKB©xçìí>?]@>AB[1] D. Kaji et al., Nucl. Instr. and Meth. A590, p.198 (2007).
R&D of target for superheavy element production and its monitoring system
KAJI, D., TANAKA, K., MORIMOTO, K.

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P13㉸㔜ඖ⣲ࣛࢨ࣮࣍ࢪ࣒࢘ 5I ࡢ⁐ᾮ໬Ꮫᐇ㦂ࡢࡓࡵࡢ 77$ ㏫┦ࢡ࣐ࣟࢺࢢࣛࣇ࢕࣮࡟ࡼࡿ =U+I ࡢ྾╔ᣲື㔠ἑ኱㝔⮬↛ 1ࠊ⌮◊ 2ࠊཎᏊຊᶵᵓ 3ࠊᮾ໭኱㟁Ꮚගࢭ 4ࠊ᪂₲኱㝔⮬↛ 5ࠊ㔠ἑ኱⌮ᕤ 6 ‫ⰾ⏣⚟ۑ‬ᶞ 1ࠊ໭ᒣ㞝ኴ 1ࠊ⩚ሙᏹග 2ࠊሯ⏣࿴᫂ 3ࠊ㇏ᔱཌྐ 3ࠊ⳥Ọⱥᑑ 4ࠊHuang M. H.2ࠊᮧୖᫀྐ 2,5ࠊᑠ᳃᭷ᕼᏊ 2ࠊ༓௦すᑿఀ⧊ 6ࠊᚋ⸨ᑦဢ 5ࠊὠ⸨⩧ᖹ 5ࠊ㛗ᒸဴஓ 5ࠊ኱Ụ୍ᘯ 5ࠊ㇂ཱྀᣅᾏ 1ࠊୖ㔝ៅ࿃ 1ࠊ
ᯘ࿴᠇ 1ࠊᶓᒣ᫂ᙪ 6䣍䣦䢢䢱䣯䣎䢢䣩䢯䢳࠙⥴ゝࠚ ࡇࢀࡲ࡛ࠊ㝧࢖࢜ࣥ஺᥮ᶞ⬡ࢆ⏝࠸ࡓ HF/HNO3 ΰ㓟⣔࡛ࡢ 104 ␒ඖ⣲ࣛࢨ࣮࣍ࢪ࣒࢘
(Rf) ࡢࣇࢵ໬≀㘒య࡟㛵ࡍࡿ◊✲[1]ࡀ⾜ࢃࢀ࡚ࡁࡓࡀࠊ⁐Ꮡ໬Ꮫ✀ࡢ≉ᐃ࡟ࡣ⮳ࡗ࡚࠸࡞࠸ࠋᮏ
◊✲࡛ࡣࠊ㔠ᒓ㘒యࡢ౯ᩘ࡟ᑐࡋ࡚ᢳฟᣲື࡟౫Ꮡᛶࢆ♧ࡍ TTA ࡟╔┠ࡋࠊ㏫┦ࢡ࣐ࣟࢺࢢࣛࣇ
ἲ࡟ࡼࡾ Rf ࡢ⁐Ꮡ໬Ꮫ✀ࢆ≉ᐃࡍࡿ࡜ඹ࡟ࠊࡑࡢࣇࢵ໬≀㘒యᙧᡂᐃᩘࢆỴᐃࡍࡿࡇ࡜ࢆ┠ᣦࡋ࡚࠸ࡿࠋ௒ᅇࠊRf ᐇ㦂࡟ྥࡅࠊྠ᪘ඖ⣲ Zr, Hf ࡢ࢜ࣥࣛ࢖ࣥ TTA ㏫┦ࢡ࣐ࣟࢺࢢࣛࣇ࢕࣮ᐇ㦂ࢆ⾜࠸ࠊᚓࡽࢀࡓ⁐㞳᭤⥺࠿ࡽศ㓄ಀᩘ (Kd) ࢆồࡵࡓࠋࡇࢀ࡜ࣂࢵࢳᐇ㦂ࡢ Kd ್ (ྛ᧠ᢾ᫬㛫ࡢぢ࠿ࡅࡢ್) ࢆẚ㍑ࡋࠊࣇࢵ໬≀࢖࢜ࣥ⃰ᗘ౫Ꮡᛶ࡟ࡘ࠸࡚ㄪ࡭ࡓࠋࡇࡢ⤖ᯝ࠿ࡽࠊࣂࢵࢳᐇ㦂࡜ࢡ࣐ࣟࢺࢢࣛࣇ࢕࣮ᐇ㦂ࡢ Kd ್ࡢ୍⮴ࠊཬࡧ Zr, Hf ࡢ Kd ್ࡢᕪࡀほ ࡛ࡁࡿ᮲௳࡟╔┠ࡋࠊRf ᐇ㦂࡟㐺ࡍࡿᐇ㦂⣔࡟ࡘ࠸࡚⪃ᐹࡋࡓࠋ࠙ᐇ㦂ࠚ ࣂࢵࢳᐇ㦂㸸ᅛ┦ᢳฟࡢᢳฟ┦࡜ࡋ࡚ࠊTTA ࡜➼㔜㔞ࡢ࢜ࢡࢱࣀ࣮ࣝ࡟⁐࠿ࡋࡓ⁐ᾮ࡜ಖᣢᶞ⬡ CHP20/P20 ࢆ 1!1 ࡢ㔜㔞ẚ࡛ΰࡐྜࢃࡏࠊTTA ᶞ⬡ࢆㄪ〇ࡋࡓࠋ᧠ᢾ⏝ࣂ࢖࢔ࣝ୰࡟TTA ᶞ⬡ࢆ 50 mg ศྲྀࡋࠊྛ⃰ᗘࡢ HF/0.01 M HNO3 ΰ㓟⁐ᾮ 2.95 mLࠊ88Zr, 175Hf ↓ᢸయࢺ࣮ࣞ
ࢧ࣮⁐ᾮ (2 kBq/mL) 50 "L ࢆຍ࠼ࠊ᧠ᢾࡋࡓࠋᅛᾮศ㞳ᚋࠊࢁᾮ 2 mL ࢆศྲྀࡋࠊ# ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺ࣮ࣜ࡟ࡼࡾ Zr, Hf ࡢᨺᑕ⬟ࢆᐃ㔞ࡋࠊຍ࠼ࡓᨺᑕ⬟࡜ࡢẚ࠿ࡽ Kd ್ࢆồࡵࡓࠋࢡ࣐ࣟࢺࢢࣛࣇ࢕࣮ᐇ㦂㸸⌮໬Ꮫ◊✲ᡤࡢ K70 AVF ࢧ࢖ࢡࣟࢺࣟࣥ࡟࡚ࠊnatY2O3/natLu2O3 ࡲࡓࡣ natGe2O3/natGd2O3 ࢱ࣮ࢤࢵࢺࢆ⏝࠸ࠊࡑࢀࡒࢀ natY(d, xn)89mZr, natLu(d, xn)175Hf ཯ᛂࡲࡓࡣ
nat
Ge(18O, xn)85Zr, natGd(18O, xn)169Hf ཯ᛂ࡟ࡼࡗ࡚ 89m,85Zr, 175,169Hf ࢆ⏕ᡂࡋࡓࠋ཯ᛂ⏕ᡂ≀ࢆ
KCl/He ࢞ࢫࢪ࢙ࢵࢺἲ࡟ࡼࡾ㎿㏿㍺㏦ࡋࠊ㎿㏿໬Ꮫศ㞳⿦⨨ (ARCA) ࡟ᤕ㞟ࡋࡓࠋྛ⃰ᗘࡢ
HF/0.01 M HNO3 ⁐ᾮ࡛ᤕ㞟≀ࢆ⁐ᾮ໬ࡋࠊࣂࢵࢳᐇ㦂࡜ྠࡌ TTA ᶞ⬡ࢆ඘ሸࡋࡓ࣐࢖ࢡ࣒ࣟ࢝ࣛ (ෆᚄ 1.6 mm $ 8 mm) ࡟ὶ㏿ (FR) ࢆ୍ᐃ࡟ࡋ࡚ᑟධࡋࡓࠋ⁐ฟᾮࢆᩘࣇࣛࢡࢩࣙࣥ࡟ศࡅ࡚
ᤕ㞟ࡋࠊᤕ㞟ࡋࡓ⁐ᾮࢆ Ge ᳨ฟჾ࡛ # ⥺ ᐃࡋࡓࠋྛࣇࣛࢡࢩࣙࣥ୰ࡢ Zr, Hf ࡑࢀࡒࢀࡢ┦ᑐᨺᑕ⬟࠿ࡽ⁐㞳᭤⥺ࢆᥥࡁࠊKd ್ࢆồࡵࡓࠋ࠙⤖ᯝ࣭⪃ᐹࠚ ࣂࢵࢳᐇ㦂 60 ⛊᧠ᢾ ཬࡧࢡ࣐ࣟࢺࢢࣛࣇ࢕࣮ᐇ㦂࡟ࡼࡿ Zr, Hf ࡢ Kd ್ࡢࣇࢵ໬≀࢖࢜ࣥ⃰ᗘ౫Ꮡᛶࢆᅗ 1 ࡟♧ࡍࠋ䢢䣜䣴䢢䣤䣣䣶䣥䣪䢢䢳䢲䢲䢲ࣂࢵࢳᐇ㦂ࡢ⤖ᯝࠊ2 $ 10㸫5 M ௨ୖࡢ䢢䣊䣨䢢䣤䣣䣶䣥䣪䢢䢢䣜䣴䢢䣥䣱䣮䣷䣯䣰䢢䣈䣔䢿䢲䢰䢳䢲䢢䣯䣎䢱䣯䣫䣰⃰ᗘ࡛ࡣ Zr, Hf ࡜ࡶ࡟ Kd ್ࡀῶᑡࢆ♧䢶䢢䣜䣴䢢䣥䣱䣮䣷䣯䣰䢢䣈䣔䢿䢲䢰䢳䢷䢢䣯䣎䢱䣯䣫䣰䢢䣊䣨䢢䣥䣱䣮䣷䣯䣰䢢䣈䣔䢿䢲䢰䢳䢷䢢䣯䣎䢱䣯䣫䣰䢴ࡋ࡚࠾ࡾࠊࣇࢵ໬≀㘒యࡀᙧᡂࡋ࡚࠸
䢳䢲䢲ࡿࡇ࡜ࡀศ࠿ࡿࠋࡲࡓࠊࡑࡢ⃰ᗘ㡿ᇦ࡛ࡣ Zr, Hf ࡢ Kd ್࡟ᕪࡀほ ࡉࢀ࡚࠾䢶䢴ࡾࠊ㘒ᙧᡂᐃᩘࡢ㐪࠸ࡀ཯ᫎࡉࢀ࡚࠸
䢳䢲ࡿ࡜⪃࠼ࡽࢀࡿࠋḟ࡟ࠊ୧ᐇ㦂ࢆẚ㍑
ࡍࡿ࡜ࠊప⃰ᗘ㡿ᇦ࡛ࡣ୧⤖ᯝࡢ୍⮴䢶䢴ࡣᝏ࠸୍᪉ࠊ㧗⃰ᗘ㡿ᇦ࡛ࡣ୍⮴ࡍࡿ
㸫5䢳ࡇ࡜ࡀศ࠿ࡿࠋࡑࢀࡺ࠼ࠊ2 $ 10 M䢴䢵䢶 䢷 䢸 䢹 䢺 䢻䢴䢵䢶 䢷 䢸 䢹 䢺 䢻䢴䢯䢷䢯䢶௨ୖࡢ⃰ᗘ࡟࠾ࡅࡿ Rf ᐇ㦂ࡀ᭷ᮃ࡛䢳䢲䢳䢲䢯䣝䣈 䣟䣧䣳䢢䢱䣏࠶ࡾࠊࡇࡢ⃰ᗘ᮲௳࡛ Zr, Hf ࡢࢡ࣐ࣟᅗ1.
ࣂࢵࢳᐇ㦂࣭ࢡ࣐ࣟࢺࢢࣛࣇ࢕࣮ᐇ㦂ࡢKd ್ࡢࢺࢢࣛࣇ࢕࣮ᐇ㦂ࡢࢹ࣮ࢱࢆࡉࡽ࡟ヲࣇࢵ໬≀࢖࢜ࣥ⃰ᗘ౫Ꮡᛶ (Ỉ┦ HF/0.01 M HNO3)⣽࡟ྲྀᚓࡍࡿணᐃ࡛࠶ࡿࠋ
࠙ཧ⪃ᩥ⊩ࠚ[1] Ishii et al., Bull. Chem. Soc. Jpn. 84, 903-911 (2011)

Adsorption behavior of Zr and Hf by TTA-reversed-phase chromatography for aqueous chemistry of asuper-heavy element Rf
FUKUDA, Y., KITAYAMA, Y., HABA, H., TSUKADA, K., TOYOSHIMA, A., KIKUNAGA, H.,
HUANG, M. H., MURAKAMI, M., KOMORI, Y., CHIYONISHIO, I., GOTO, N., TSUTO, S.,
NAGAOKA, T., OOE, K., TANIGUCHI, T., UENO, S., HAYASHI, K., YOKOYAMA, A.

- 129 -

P14

⾲㠃㟁㞳࢖࢜ࣥ໬ຠ⋡࡟ᐤ୚ࡍࡿཎᏊ࡜࢖࢜ࣥࡢບ㉳‽఩ࡢຠᯝ
ཎᏊຊᶵᵓ ‫ۑ‬ὸ஭㞞ேࠊబ⸨ဴஓࠊ㔠㇂భு䛆⥴ゝ䛇㻌 ཎᏊࡢ➨୍࢖࢜ࣥ໬࢚ࢿࣝࢠ࣮ࡣ᭱እẆ㟁Ꮚࡢ⤖ྜ࢚ࢿࣝࢠ࣮ࢆ┤᥋཯ᫎࡍࡿ≀⌮㔞࡛࠶ࡾࠊඖ⣲ࡢ໬Ꮫⓗᛶ㉁࡜ࡶᴟࡵ࡚ᐦ᥋࡟㛵ಀࡍࡿࠋᡃࠎࡣ㉸㔜ඖ⣲ࡢ໬Ꮫⓗᛶ㉁ࢆ᫂
ࡽ࠿࡟ࡍࡿ◊✲ࡢ୍⎔࡛࢖࢜ࣥ໬࢚ࢿࣝࢠ࣮࡟╔┠ࡋࠊ103 ␒ඖ⣲ Lr ࡢ➨୍࢖࢜ࣥ໬࢚ࢿࣝࢠ࣮ ᐃࢆ┠ᶆ࡟◊✲ࢆ㐍ࡵ࡚ࡁࡓࠋ➨୍࢖࢜ࣥ໬࢚ࢿࣝࢠ࣮ࡣ 99 ␒ඖ⣲ Es ࡲ࡛࣮ࣞࢨ࣮
ඹ㬆࢖࢜ࣥ໬ἲ࡟ࡼࡾ ᐃࡉࢀ࡚࠸ࡿࡀࠊ100 ␒ඖ⣲௨ୖ࡛ࡣ ᐃ࡟ᚲせ࡞ཎᏊࡢᩘࡀ㊊ࡾࡎࠊ᪤Ꮡࡢ᪉ἲࡀ㐺⏝࡛ࡁ࡞࠸ࠋᡃࠎࡣ༙ῶᮇࡀ▷ࡃ⏕ᡂ㔞ࡢᴟࡵ࡚ᑡ࡞࠸ Lr ࡟㐺⏝࡛ࡁࡿ᪉ἲ࡜ࡋ࡚ࠊ᪂ࡓ࡟⾲㠃㟁㞳࢖࢜ࣥ໬ἲࢆ㛤Ⓨࡋࠊ✀ࠎࡢ▷ᑑ࿨ᕼᅵ㢮ඖ⣲ࢆ⏝࠸࡚ᐇ㦂ࢆ⾜࠸ࠊࡑࡢ᭷ຠᛶࢆ᳨ドࡋ࡚ࡁࡓࠋᮏᡭἲ࡛ࡣࠊ⾲㠃㟁㞳࢖࢜ࣥ໬ຠ⋡ࢆグ㏙ࡍࡿ SahaLangmuir ࡢᘧࢆ⏝࠸ࠊ࢖࢜ࣥ໬ຠ⋡ࡢᐇ㦂್࠿ࡽ➨୍࢖࢜ࣥ໬࢚ࢿࣝࢠ࣮ࢆỴᐃࡍࡿࠋ௒ᅇࠊ
࢖࢜ࣥ໬ࣉࣟࢭࢫ࡟࠾ࡅࡿཎᏊ࡜࢖࢜ࣥࡢບ㉳‽఩ࡢᐤ୚ࢆཝᐦ࡟⪃៖ࡍࡿࡇ࡜࡛ࠊ✀ࠎࡢᕼᅵ㢮ඖ⣲ࡢ࢖࢜ࣥ໬ຠ⋡ࡢᐇ㦂್ࢆ㠀ᖖ࡟Ⰻࡃ෌⌧ࡍࡿࡇ࡜࡟ᡂຌࡋࡓࡢ࡛ሗ࿌ࡍࡿࠋ
䛆᪉ἲཬ䜃⤖ᯝ䛇㻌 ⾲㠃㟁㞳࢖࢜ࣥ໬ຠ⋡ࡣࠊ㐣ཤࡢ୺࡞ㄽᩥ[1,2]࡛ࡣ௨ୗࡢᘧ࡛⾲ࡉࢀࡿࠋ!"# $ &$+ , -.
+ , -. 2
*
1
*
1
"
'()
"
'()
/0
# % &%/0# $ 3# % ࡣ⾲㠃࡟࠾ࡅࡿ࢖࢜ࣥ࡜୰ᛶཎᏊࡢᩘࡢẚࠊ+ࡣ⾲㠃ࡢ௙஦㛵ᩘࠊ-.ࡣᑐ㇟ඖ⣲ࡢ࢖࢜ࣥ໬࢚ࢿࣝࢠ࣮ࠊ/ࡣ࣎ࣝࢶ࣐ࣥᐃᩘࠊ0ࡣ ᗘ࡛࠶ࡿࠋ&$ ཬࡧ&% ࡣ࢖࢜ࣥཬࡧ୰ᛶཎᏊࡀ
ྲྀࡾᚓࡿ≧ែࡢᩘ㸦⤫ィ㔜⋡㸧࡛ࠊ㏻ᖖᇶᗏ≧ែࡢ㟁Ꮚ㓄⨨ࡢ඲ゅ㐠ື㔞4ࢆ⏝࠸࡚& " 54 6 7࡜ィ⟬ࡉࢀࡿࠋ࡜ࡇࢁࡀᇶᗏ≧ែ㏆ഐ࡟పບ㉳‽఩ࡀᏑᅾࡍࡿ࡜ࠊ㧗 㔠ᒓ⾲㠃ࡢཎᏊࡸ࢖
࢜ࣥࡣ࣎ࣝࢶ࣐ࣥศᕸ࡟ᚑࡗ࡚ບ㉳≧ែ࡟ࡶศᕸࡍࡿࠋࡑࡢሙྜࠊᇶᗏ≧ែ㛫ࡢ࢖࢜ࣥ໬ࡔ
ࡅ࡛࡞ࡃࠊཎᏊࡢບ㉳‽఩࠿ࡽࡢ࢖࢜ࣥ໬ࡸ࢖࢜ࣥࡢບ㉳‽఩࡬ࡢ࢖࢜ࣥ໬ࡶ⪃៖ࡍࡿᚲせࡀ࠶ࡾࠊࡇࢀࡽࢆཝᐦ࡟⪃៖ࡍࡿ࡜๓㏙ࡢ Saha-Langmuir ࡢᘧࡣ௨ୗࡢࡼ࠺࡟࡞ࡿ[3]ࠋ
+ , -.
@>+ , -. 2# $ 8 $ 90:
1 " '() *1 ; <<<<<<<890: " = &> '() ?, A'() *!" % " %
/0
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8 90:
ࣝࢠ࣮ཬࡧ⤫ィ㔜⋡࡛࠶ࡿࠋࡇࢀࡽࡢᘧࢆ⏝࠸࡚࢖࢜ࣥ

໬ຠ⋡ࡢᐇ㦂್ࢆᐇຠ࢖࢜ࣥ໬࢚ࢿࣝࢠ࣮-. 2 ࡟ᑐࡋ࡚ࣉࣟࢵࢺࡍࡿ࡜ᅗ 1 ࡢࡼ࠺࡟࡞ࡾࠊບ㉳‽఩ࢆ⪃៖ࡍࡿࡇ࡜࡛ࡍ࡭࡚ࡢᐇ㦂್ࢆ Saha-Langmuir ࡢᘧ࡛Ⰻࡃࣇ࢕
ࢵࢺࡍࡿࡇ࡜ࡀ࡛ࡁࡓࠋࡇࡢຠᯝࡣ 1950 ᖺ௦࡟ࡣ᪤࡟ᐃ
ᘧ໬ࡉࢀ࡚࠸ࡓࡀ[3]ࠊࡑࡢᙳ㡪ࡣᑠࡉ࠸࡜ࡋ࡚ࡇࢀࡲ࡛
࠶ࡲࡾ⪃៖ࡉࢀ࡚᮶࡞࠿ࡗࡓ[1,2]ࠋ௒ᅇࡢ⤖ᯝ࡟ࡼࡾࠊ⾲㠃㟁㞳࢖࢜ࣥ໬ἲࡢ᭷ຠᛶࢆ☜❧ࡍࡿࡇ࡜ࡀ࡛ࡁࡓࠋ

Rb

100

࢖࢜ࣥ໬ຠ⋡ ! = n" / (1 + n")

890:ࡣศ㓄㛵ᩘ࡛ࠊ@> ཬࡧ&> ࡣࡑࢀࡒࢀບ㉳‽఩Bࡢ࢚ࢿ>

Saha-Langmuir ࡢᘧ࡟ࡼࡿ
ࣇ࢕ࢵࢸ࢕ࣥࢢ᭤⥺ᗘ 2800 K

⾲㠃

10-1

Sm

Pm
Eu

Lu
Tb
Yb

Ho
Er
Tm

10-2
4

ບ㉳‽఩ࢆ⪃៖ᇶᗏ≧ែࡢࡳ⪃៖
56ᐇຠ࢖࢜ࣥ໬࢚ࢿࣝࢠ࣮ IP㸨(eV)7䛆ཧ⪃ᩥ⊩䛇㻌

ᅗ 1: ⾲㠃㟁㞳࢖࢜ࣥ໬ຠ⋡ࡢ

[1] R. Kirchner, Nucl. Instrum. Methods 186 (1981) 275.

ᐇ㦂್ࢆᐇຠ࢖࢜ࣥ໬࢚ࢿࣝࢠ

[2] G. R. Hertel, J. Chem. Phys. 48 (1968) 2053.

࣮㸦ບ㉳‽఩ࡢ⪃៖᭷ࡾࠊ↓ࡋ㸧

[3] É. Ya. Zandberg and N. I. Ionov, Sov. Phys. Usp. 67 (1959) 255.

࡟ᑐࡋ࡚ࣉࣟࢵࢺࠋ
Effect of excited states in atom and ion contributing to the surface-ionization efficiency
ASAI, M., SATO, T. K., KANEYA, Y.

- 130 -

P15▷ᑑ࿨ࣉ࣮ࣟࣈ᰾ 19F Ћ19O ࡢᛂ⏝࡟ྥࡅࡓ
࢜ࣥࣛ࢖ࣥ Ț ⥺ᦤືゅ┦㛵ᐃࢩࢫࢸ࣒ࡢᵓ⠏㔠ἑ኱㝔⮬↛ ࠊ㜰኱㝔⌮ ࠊ㔠ἑ኱⌮ᕤ  ‫↷⃝⸨ۑ‬ຌ ࠊᓥ⏣ᫀⱥ ࠊ୕ཎᇶႹ ࠊబ⸨΅ 䛆ᗎㄽ䛇㻌ࣇࢵ⣲(F)ࢆྵ᭷ࡍࡿ≀㉁ࡢ≀ᛶ◊✲ࢆ⾜࠺ୖ࡛ࠊF ཎᏊ࿘㎶ࡢᒁᡤᵓ㐀࡟㛵ࡍࡿ᝟ሗࡣᚲ
せ୙ྍḞ࡛࠶ࡿࠋF ཎᏊ᰾఩⨨࡛ࡢᒁᡤᵓ㐀ࢆㄪ࡭ࡿ᪉ἲࡢ୍ࡘ࡟ F ཎᏊ᰾఩⨨࡛ࡢ㟁ሙ໙㓄ࢆ ᐃࡍࡿᦤືゅ┦㛵ἲ(PAC)ࡀ࠶ࡿࠋPAC ἲ࡛ࡣࣉ࣮ࣟࣈ᰾ࢆヨᩱ࡟ᑟධࡍࡿᚲせࡀ᭷ࡾࠊF ࡢሙྜࡣ၏୍ࡢᏳᐃྠ఩య࡛࠶ࡿ 19F ࡀ᭱ࡶ᭷ຊ࡞ೃ⿵࡜࡞ࡿࡀࠊ19F ᰾ࡢᇶᗏ≧ែ(I=1/2)ࡣ㟁ሙ໙㓄ࡢᑟฟ࡟ᚲせ࡞㟁Ẽᅄ㔜ᴟ࣮࣓ࣔࣥࢺࢆᣢࡓ࡞࠸ࠋࡑࡇ࡛ᮏ◊✲࡛ࡣ 19O ࠿ࡽࡢ βቯኚ࡟ࡼࡗ࡚⏕ࡌࡿ 19F ࡢ➨஧ບ㉳‽఩(I=5/2)ࡢ฼⏝࡟╔┠ࡋࠊ19O ࡢヨᩱ࡬ࡢᑟධࢆヨࡳ࡚࠸ࡿࠋࡋ࠿ࡋぶ᰾ 19O ࡣ༙ῶᮇࡀ 26.9s ࡜▷࠸ࡓࡵ࡟ࠊ㏻ᖖࡢ໬Ꮫ᧯స࡛ࡢヨᩱ࡬ࡢᑟධࡀᅔ
㞴࡛࠶ࡿࠋᚑࡗ࡚ᮏ◊✲࡛ࡣຍ㏿ჾࢆ⏝࠸࡚ࣉ࣮ࣟࣈ᰾ࢆ┤᥋ヨᩱ࡬ᑟධࡍࡿ࢜ࣥࣛ࢖ࣥᦤ
ືゅ┦㛵ἲࢆ㛤Ⓨࡋࠊᙜヱບ㉳‽఩ࡢ㟁Ẽᅄ㔜ᴟ࣮࣓ࣔࣥࢺࢆỴᐃࡍࡿࡇ࡜ࢆ┠ᣦࡋ࡚࠸ࡿࠋ䛆ᐇ㦂䛇ᐇ㦂ࡣ኱㜰኱Ꮫࡢࣦ࢓ࣥࢹࢢࣛࣇຍ㏿ჾ᪋タ࡟࡚ Ti18O2 ࢱ࣮ࢤࢵࢺ࡟㔜㝧Ꮚࢆ↷ᑕࡋ࡚ࠊ
18
O(d, p)19O ࡢ᰾཯ᛂ࡟ࡼࡾ 19O ࢆ⏕ᡂࡋࠊ཯㊴ࡋࡓ 19O ࢆࡑࡢࡲࡲヨᩱࡢࣇࢵ໬࣐ࢢࢿࢩ࢘
࣒(MgF2)࡟ᑟධࡍࡿᡭἲࢆ᥇⏝ࡋࡓࠋ࢜ࣥࣛ࢖ࣥ PAC ἲ࡛ࡣ࢜ࣇࣛ࢖ࣥࡢ᫬࡜␗࡞ࡾࠊࣅ࣮
࣒⏤᮶ࡢࣂࢵࢡࢢࣛ࢘ࣥࢻࡀ㠀ᖖ࡟㧗࠸ࡢ࡛ࠊᅇ㊰ㄪᩚ࡟ࡼࡗ࡚ࣂࢵࢡࢢࣛ࢘ࣥࢻࡢᢚไࢆ
⾜ࡗࡓࠋᵓ⠏ࡋࡓᅇ㊰ࢆ Fig.1 ࡟♧ࡍࠋ᳨ฟჾ࡟ࡣ᫬㛫ศゎ⬟࡟ඃࢀࡿ BaF2 ࢩࣥࢳ࣮ࣞࢱ࣮
ࢆ᥇⏝ࡋࠊࢹ࣮ࢱࢆࣜࢫࢺᙧᘧ࡛ಖᏑྍ⬟࡞ VME つ᱁ࡢࢹ࣮ࢱ཰㞟ࢩࢫࢸ࣒ࢆ౑⏝ࡋࡓࠋ࠙⤖ᯝࠚ Fig.2 ࡟ ᐃ࡟ࡼࡾᚓࡽࢀࡓ PAC ࢫ࣌ࢡࢺࣝࢆ♧ࡍࠋࡇࡢࢫ࣌ࢡࢺࣝ࠿ࡽ 19F(Ћ19O)ࣉ࣮ࣟࣈ᰾
࡜ࡑࡢ࿘ࡾࡢ㟁౯ࡀ᰾఩⨨࡟సࡿ㟁ሙ໙㓄࡜ࡢ┦஫స⏝࡟ࡼࡿࠊ᰾ࢫࣆࣥࡢṓᕪ㐠ືࢆ཯ᫎࡋࡓ
࡜⪃࠼ࡽࢀࡿ᣺ືᡂศࡀほ ࡉࢀࡓࠋࡋ࠿ࡋᮏ᮶ண᝿ࡉࢀࡿ␗᪉ᛶࡢ್࡜㝸ࡓࡾࡀ࠶ࡿࡓࡵࠊ⣧⢋࡟᣺ືᡂศࡢࡳࡀᐤ୚ࡋ࡚࠸ࡿࡢ࡛ࡣ࡞࠸ྍ⬟ᛶࡶྰᐃ࡛ࡁ࡞࠸ࠋ⌧ᅾࠊࣂࢵࢡࢢࣛ࢘ࣥࢻࡢ
᭦࡞ࡿᢚไ࡜ࠊ⤫ィ⢭ᗘࡢྥୖࢆ┠ᣦࡋ࡚ ᐃ⣔ࡢᨵⰋࢆ⾜ࡗ࡚࠸ࡿࠋ
-0.5

Preliminary

22

22

A G (t)

-0.25
0
0.25
0.5

Fig.1 ࢜ࣥࣛ࢖ࣥ PAC

0

50

100

150

Time(ns)Fig.2 MgF2 ୰ࡢ 19F(Ћ19O)ࡢ

ᐃࡢᅇ㊰ᅗ

PAC ࢫ࣌ࢡࢺࣝ

Development of an online perturbed angular correlation measurement system for the application of theshort-lived 19F(←19O) probe
FUJISAWA, T., SHIMADA, M., MIHARA, M., SATO,W..

- 131 -

P16

Ⓨග࣓ࢫࣂ࢘࢔࣮ศගἲ࡟ࡼࡿ Co ࡜ Mn ࢆඹࢻ࣮ࣉࡋࡓ ZnO ࡢᕼⷧ☢
ᛶࡢ◊✲㔠ἑ኱㝔⮬↛ ࠊ㔠ἑ኱⌮ᕤ  ‫ۑ‬ຍ⣡ᗣ኱ ࠊ㕥ᮌ༟ஓ ࠊబ⸨΅ ࠊ࠙⥴ゝࠚ ᕼⷧ☢ᛶ༙ᑟయ(DMS)ࡣ㟁Ꮚࢫࣆࣥࡢไᚚ࡟ࡼࡾ㟁ὶ≉ᛶࢆไᚚࡍࡿࢫࣆࣥࢺࣟ
ࢽࢡࢫ࡟ᛂ⏝࡛ࡁࡿᮦᩱ࡜ࡋ࡚ᮇᚅࡉࢀ࡚࠸ࡿࠋDMS ࡢೃ⿵࡜࡞ࡿ≀㉁ࡢ୰࡛ࠊ㇏ᐩ࡟࠶ࡿ㈨※࡛Ᏻ౯࡟ᡭ࡟ධࡿ㓟໬ள㖄(ZnO)ࢆ⏝࠸ࡓ⣔ࡀ⌧ᅾὀ┠ࡉࢀ࡚࠸ࡿࠋࡋ࠿ࡋࠊ㑄⛣㔠ᒓࢆࢻ࣮ࣉࡋࡓ ZnO ࡢᕼⷧ☢ᛶ࡟ࡘ࠸࡚ከᩘሗ࿌ࡉࢀ࡚࠸ࡿࡀࠊ୙⣧≀ࡢᏑᅾ≧ែ࡟㛵ࡋ࡚⤫୍ࡋࡓぢゎ࡟⮳ࡗ࡚࠾ࡽࡎࠊ☢ᛶࡢⓎ⌧ࡢ┿ഇࢆྵࡵ㆟ㄽࡍ࡭ࡁⅬࡀከ࠸ࠋᮏ◊✲࡛ࡣࠊ␗࡞
ࡿ⃰ᗘ࡛ Co ࡜ Mn ࢆඹࢻ࣮ࣉࡋࡓ ZnO ࢆྜᡂࡋࠊⓎග࣓ࢫࣂ࢘࢔࣮ศගἲ࡟ࡼࡾヨᩱ୰ࡢ୙⣧≀ࡢ≧ែࢆཎᏊ࡛ࣞ࣋ࣝほ ࡍࡿࡇ࡜ࢆ┠ⓗ࡜ࡋ࡚ᐇ㦂ࢆ⾜ࡗࡓࠋ࠙ᐇ㦂ࠚ Co ࡜ Mn ࢆ 1%࠾ࡼࡧ 3%ࡎࡘඹࢻ࣮ࣉࡋࡓ ZnO ヨᩱࢆࠊ⢊ᮎ ZnO ࡜㔠ᒓ⢊ᮎࡢ
Co ࡜ Mn ࢆฟⓎ≀㉁࡜ࡋࡓᅛ┦཯ᛂἲ࡟࡚ྜᡂࡋࡓࠋCo ࡜ Mn ࢆ◪㓟࡟⁐ゎࡉࡏ༑ศ࡟᧠ᢾ
ࡋࡓᚋࠊ㘄๣ᡂᆺࡋࡓ ZnO ࡟⁲ୗࡋ㉥እ⥺ࣛࣥࣉ࡛஝⇱ࡉࡏࡓࠋࡑࡢᚋ✵Ẽ୰ 200Υ࡛௬↝ࡁࢆࡋࠊ⥆࠸࡚ 1100Υ࡛↝ᡂࡋࡓࠋྜᡂࡋࡓྛ ZnO ヨᩱ࡟ࡘ࠸࡚⢊ᮎ X ⥺ᅇᢡ ᐃ(XRD)ࢆ⾜ࡗࡓࠋࡑࢀࡽࡢヨᩱ࡟ᚤ㔞ࡢ 57Co ࡢ HCl ⁐ᾮࢆ⁲ୗࡋࠊ1100Υ࡛↝ᡂࡋࡓᚋࠊⓎග࣓ࢫࣂ࢘࢔࣮ศග ᐃࢆ⾜ࡗࡓࠋ࠙⤖ᯝ࡜⪃ᐹࠚ XRD ࡟࠾࠸࡚ࡣࠊ࠸ࡎࢀࡢヨᩱࡶ ZnO⏤᮶௨እࡢᅇᢡࣆ࣮ࢡࡣぢࡽࢀ࡞࠿ࡗࡓࠋࡇࢀ࡟ࡣࠊ1)
Co ࡜ Mn ࡀᅛ⁐ࡋ࡚࠸ࡿྍ⬟ᛶ࡜ 2) XRD ࡛ࡢ᳨ฟ㝈⏺
௨ୗࡢࡓࡵほ ࡉࢀ࡞࠿ࡗࡓ࡜࠸࠺஧㏻ࡾࡢྍ⬟ᛶࡀ⪃࠼ࡽࢀࡿࡀࠊXRD ࡢ⤖ᯝࡢࡳ࡛ࡣ୧⪅ࡢุูࡣᅔ㞴࡛࠶ࡿࠋCo ఩⨨ࡢᒁᡤᵓ㐀ࠊ࠾ࡼࡧ☢ᛶࢆ⢭ᰝࡍࡿࡓࡵ࡟⾜ࡗࡓ 57Co ࢆ⥺※࡜ࡍࡿⓎග࣓ࢫࣂ࢘࢔࣮ศග ᐃࡢ⤖ᯝࢆ Fig.1 ࡟♧ࡍࠋ࠸ࡎࢀࡢヨᩱ࡟࠾࠸࡚ࡶ࣓ࢫࣂ࢘࢔
࣮ࢫ࣌ࢡࢺࣝ࡟ᙉ☢ᛶࢆ♧ࡍ☢Ẽศ⿣ࡀぢࡽࢀ࡞࠿ࡗ
ࡓࡓࡵࠊ␗࡞ࡗࡓ໬Ꮫ⎔ቃୗ࡟࠾࠿ࢀࡓ஧ࡘࡢࢲࣈࣞࢵ
ࢺࡢᡂศࢆ௬ᐃࡋ࡚ゎᯒࢆ⾜ࡗࡓࠋ୺ᡂศࣃ࣓࣮ࣛࢱ࣮
C1 ࡟࠾࠸࡚ࡣ࠸ࡎࢀࡶㄗᕪ⠊ᅖ୍࡛⮴ࡋ࡚࠾ࡾࠊ␗ᛶ
యࢩࣇࢺࡢ್࠿ࡽࡶ ZnO ᱁Ꮚ୰ࡢ Zn2+ࢆ⨨᥮ࡋࡓ Co2+ࡢྍ⬟ᛶࡀ㧗࠸ 1ࠋࡲࡓࠊඹࢻ࣮ࣉࡋࡓ⃰ᗘࡀ㧗ࡃ࡞ࡿ࡟ࡘࢀࠊ๪ᡂศࡢ๭ྜࡀ኱ࡁࡃ࡞ࡗ࡚࠸ࡿࠋᐊ ࡛ᙉ☢
ᛶࡣ♧ࡉ࡞࠿ࡗࡓࡀࠊప ࡛☢ᛶࢆⓎ⌧ࡍࡿྍ⬟ᛶࡀ࠶ࡿࠋ⌧ᅾࠊప
ᐃ⿦⨨ࡢ❧ࡕୖࡆࢆ⾜ࡗ࡚࠸ࡿ࡜ࡇࢁ
࡛࠶ࡿࠋ
Reference
1
Y.Abreu et al. Solid State Communication 185 (2014) 25-29

C1

(a)

IS = 0.82(1)QS = 0.37(1)C2(c) IS = 0.24(10)QS = 0.46(12)

C1

(b)

IS = 0.82(1)QS = 0.38(1)C2 IS = 0.27(5)(b) QS = 0.40(7)

C1

(c)

IS = 0.82(1)QS = 0.38(1)C2 IS = 0.23(2)QS = 0.49(2)Fig.1 ZnO ୰ࡢ 57Co ࡢⓎග࣓ࢫࣂ࢘࢔
࣮ࢫ࣌ࢡࢺࣝ (a) ZnO ୰ࡢ 57Coࠊ(b)Co ࡜ Mn ࢆ 1%ࡎࡘඹࢻ࣮ࣉࡋࡓ ZnO
୰ࡢ 57Coࠊ(c) Co ࡜ Mn ࢆ 3%ࡎࡘඹ
ࢻ࣮ࣉࡋࡓ ZnO ୰ࡢ 57Co

Study of dilute magnetism for Co and Mn codoped ZnO by means of emission Mössbauer
spectroscopy
KANO, Y., SUZUKI, T., SATO, W.

- 132 -

P17᭷ᶵ㔠㓄఩Ꮚ࡜⤖ྜࡋࡓ㉸ཎᏊ౯࢔ࣥࢳࣔࣥ໬ྜ≀ࡢ 121Sb ࣓ࢫࣂ࢘࢔
࣮ࢫ࣌ࢡࢺࣝ
ᮾ㑥኱⌮ ‫ۑ‬኱㔝ᑗኴࠊబ⸨᫂᪥⨾ࠊ㧗ᶫṇࠊᯇᕝྐ㑻䛆⥴ゝ䛇 㧗࿘ᮇ඾ᆺඖ⣲ࡣ㉸ཎᏊ౯ࢆ࡜ࡿࡇ࡜ࡀ࡛ࡁࡿࡓࡵࠊ
ࣝ࢖ࢫ㓟Ⅼ࡜ࡋ࡚ാࡃࡇ࡜ࡀ࡛ࡁࡿࠋࡇࡢࡓࡵࠊ୍⯡ⓗ࡞㔠ᒓ࡜㓄఩Ꮚ㛫ࡢ┦஫స⏝࡜ࡣ␗࡞ࡿ M→L ࡬ࡢ┦஫స⏝ࡀᮇᚅ࡛ࡁࡿࠋᐇ㝿࡟ࠊᗈᓥ኱Ꮫࡢ⛅ⴥ-ᒣᮏ䜾䝹䞊䝥䛿㉸ཎᏊ౯䜰䞁䝏䝰䞁䛾䜶䜽 䜰䝖䝸䜰䝹఩䛻 FeCp(CO)2, FeCp(CO)PPh3,
MCp(CO)3 (M = Cr, Mo, W)࡞࡝ࡀ⤖ྜࡋࡓ໬ྜ≀ 1, 2)ࢆሗ࿌
ࡋ࡚࠸ࡿࠋࡑࡇ࡛ᮏ◊✲࡛ࡣࠊ㉸ཎᏊ౯࢔ࣥࢳࣔࣥࡢ࢚ࢡ࢔
ࢺࣜ࢔ࣝ఩࡟᭷ᶵ㔠㘒యࡀ⤖ྜࡋࡓ໬ྜ≀(1’~7)ࢆྜᡂࡋࠊ
121
Sb ࣓ࢫࣂ࢘࢔࣮ࢫ࣌ࢡࢺࣝ࡟ࡼࡾࠊAu!Sb ┦஫స⏝ࡢ▱ぢࢆᚓࡿࡇ࡜ࢆ┠ⓗ࡜ࡋࡓࠋ䛆 ᐇ 㦂 䛇 1’~7 ࡣ Rf2Sb!Li+ ࡜ AuClL (L = PPh3, P(p-Tol)3, Table 1. 121Sb Mössbauer
P(o-Tol)3, PMes3, PCy3, PEt3, SMe2) ࢆ஝⇱ THF ୰࡛㑏ὶࡉࡏ parameters for Rf2SbX.
࡚ᚓࡓࠋ໬ྜ≀ Rf2SbAuP(o-Tol)3 (3), Rf2SbAuPEt3 (6),
Rf2SbAuSMe2 (7) ࡢ 121Sb ࣓ࢫࣂ࢘࢔࣮ࢫ࣌ࢡࢺࣝࡣ
Ca121mSnO3 (16 MBq)ࢆ⥺※࡜ࡋ࡚ 12 K ࡛ ᐃࡋࡓࠋ䛆⤖ᯝ䛸⪃ᐹ䛇࣓ࢫࣂ࢘࢔࣮ࣃ࣓࣮ࣛࢱ࣮ࢆ Table 1 ࡟♧ࡍࠋ໬ྜ≀ 3, 6, 7 ࡢ␗ᛶయࢩࣇࢺ(")ࡢ್(12 K ࡛ࡢ InSb
ᇶ‽)ࡣࠊࢫࢳ࣎ࣛࢽࢻ[Rf2Sb!][NEt4+] (I)࡜ẚ࡭࡚ṇഃ࡟ࢩࣇࢺࡋ࡚࠾ࡾࠊࡇࢀࡣ 5 㓄఩ࢫࢳ࣎ࣛࣥࡢ⠊ᅖෆ࡛࠶
ࡿࠋFigure 1 ࡟ᅄᴟᏊ⤖ྜᐃᩘ(e2qQ)࡜"ࡢ㛵ಀࢆ♧ࡋࡓࠋᅗ࡛ࡣ"ࡣ㈇࡟኱ࡁ࠸࡯࡝ Sb ཎᏊୖࡢ 5s 㟁Ꮚᐦᗘࡀ㧗࠸ࡇ࡜ࢆ♧ࡋࠊe2qQ ࡀṇ࡟኱ࡁ࠸࡯࡝࢔ࣥࢳࣔࣥཎᏊ
ࡢ࢚ࢡ࢔ࢺࣜ࢔ࣝᖹ㠃ୖࡢ px, py 㟁Ꮚᐦᗘࡀ㧗࠸ࡇ࡜ࢆ♧ࡍࠋࡑࡢࡓࡵࠊ࢔ࣥࢳࣔࣥཎᏊୖ࡟㠀ඹ᭷㟁Ꮚᑐࢆᣢࡘࢫࢳ࣎ࣛࢽࢻ[Rf2Sb!][NEt4+] (I)ࡣ"࡜ e2qQ ࡢ࡝ࡕࡽࡢ್ࡶ᭱ࡶ኱ࡁ࡞್ࢆ♧ࡍࠋ
୍᪉ࠊ5 㓄఩ࢫࢳ࣎ࣛࣥࡢ Rf2SbTol (Tol =p-CH3C6H4) (A)ࡣ"࡜ e2qQ ࡢ࡝ࡕࡽࡢ್ࡶ᭱ࡶ
ᑠࡉ࠸್ࢆ࡜ࡿࠋM!Sb #⤖ྜࢆᣢࡘ໬ྜ≀ࡣࢫࢳ࣎ࣛࢽࢻ࡜ࢫࢳ࣎ࣛࣥࡢ୰㛫ࡢ್ࢆ࡜ࡿ
ࡇ࡜ࡀ▱ࡽࢀ࡚࠾ࡾ 3)ࠊ࢚ࢡ࢔ࢺࣜ࢔ࣝ㠃ෆ࡟ࡣ A ࡢ࡜ࡁࡼࡾࡶከࡃࡢ㟁ᏊࡀᏑᅾࡋ࡚࠸ࡿࠋ
2
௒ᅇ ᐃࡋࡓ໬ྜ≀ 3, 6, 7 ࡢࣃ࣓࣮ࣛࢱ࣮ࡣࡇࢀ Figure 1. Plot of |e qQ| against " for Rf2SbX.
ࡽࡢ M!Sb ⤖ྜࢆᣢࡘ໬ྜ≀䛾䛖䛱䚸㕲໬ྜ≀䛸ྠ⛬ᗘ䛾್䜢♧䛧䛯䚹1) Yamamoto, Y.; Okazaki, M.; Wakisaka, Y.; Akiba, K.-y. Organometallics 1995, 14, 3364-3369. 2) Toyota, K.; Yamamoto,Y.; Akiba, K.-y. Organometallics 2000, 19, 5134-5142. 3) Takahashi, M. et al. Z. Naturforsch. 2002, 57a, 631-639.
121

Sb Mössbauer spectra of pentacoordinated stiboranes with Au(I) fragments.
(Toho
Univ.)
Shota Ohno,
Asumi Sato, Masashi
Takahashi, Shiro
OHNO,
S., SATO,
A.,TAKAHASHI,
M., MATSUKAWA,
S. Matsukawa- 133 -

P18ࡑࠗ࠽࡯ࠕࠢ࠴ࡁࠗ࠼ߩਛᕈሶ⺃⿠ᩭಽⵚ߅ࠃ߮ਛᕈሶ᝝₪ᢿ㕙Ⓧߩหᤨ
᷹ቯᴺߩ㐿⊒ᣂẟᄢ㒮⥄ὼ ‫ޔ‬JAEA‫ޔ‬York Univ‫⨙ޔ‬ᄢℂᎿቇ ‫ޔ‬ᣂẟᄢℂ  ٤↰᧛ାⴕ ‫⷏ޔ‬የൎਭ ‫ޔ‬ᑝἑஜᄥ㇢ ‫⷏ޔ‬ਛ৻ᦶ ‫’ޔ‬੗ብਯ ‫᧛ᧁޔ‬ᢕ ‫ޔ‬ᄥ↰๟਽ ‫ޔ‬A. Andreyev‫ޔ‬M. Vermeulen‫ޔ‬S. Gilespire‫ޔ‬M. Bently‫ޔ‬᳗ጊ㆐㇢ ‫ޔ‬ᄢᳯ৻ᒄ ‫ޔ‬ᓟ⮮⌀৻ ‫ޔ‬Ꮏ⮮ਭᤘ 

1. ⢛᥊
ේሶἹߩㆇォߦ઻޿⊒↢ߔࠆ૶↪ᷣߺᩭΆᢱߦߪ‫ޔ‬㐳ኼ๮ᩭ⒳߇ᄙᢙሽ࿷ߒಣℂ႐๟ㄝߩⅣႺߦ߅ߌࠆ㐳ᦼ⊛ߥ᡼኿✢ᓇ㗀߇ ᔨߐࠇߡ޿ࠆ‫ޕ‬㐳ኼ๮ᩭ⒳ߩᄙߊߪࡑࠗ࠽࡯ࠕࠢ࠴ࡁࠗ࠼㧔MA‫ޔ‬․ߦ Np, Am, Cm㧕ߢ޽ࠅ‫ޔ‬MA ߩಽ㔌ᄌ឵ࠍⴕ߁ߎߣߢ᡼኿✢ᓇ㗀ࠍૐᷫߔࠆߎߣࠍᬌ⸛ߒߡ޿ࠆ‫ ࠄࠇߎޕ‬MA ࠍᄌ឵ߔࠆᛛⴚߣߒߡടㅦེ㚟േἹࠪࠬ࠹ࡓ㧔ADS㧕ߩ⎇ⓥ㐿⊒߇ⴕࠊࠇߡ޿ࠆ‫ޕ‬
ADS ߩታ⃻ߩߚ߼ߦߪ‫ޔ‬MA ߩ♖⏕ߥਛᕈሶ⺃⿠ᩭ෻ᔕᢿ㕙Ⓧ߇ᔅⷐߣߐࠇߡ޿ࠆ‫ޕ‬ᧄ⎇ⓥߢߪ‫ޔ‬ᄢᒝᐲ㓁ሶടㅦེታ㛎ᣉ⸳㧔J-PARC㧕ߩ‛⾰㨯↢๮⑼ቇታ㛎ᣉ⸳㧔MLF㧕ߢᓧࠄࠇࠆਛᕈሶࡆ࡯ࡓࠍ೑
↪ߒ‫ޔ‬241Am ߩਛᕈሶ⺃⿠ᩭಽⵚ෻ᔕᢿ㕙Ⓧ߅ࠃ߮ਛᕈሶ᝝
₪෻ᔕᢿ㕙Ⓧࠍหᤨߦ᷹ቯߔࠆᣇᴺࠍ㐿⊒ߒߚ‫ޕ‬
2. ታ㛎ߣ⠨ኤ ࿑ 1 ߦታ㛎ߩ࠮࠶࠻ࠕ࠶ࡊࠍ␜ߔ‫࡞࠮ࡊࠞࡓ࠙࠾ࡒ࡞ࠕޕ‬ౝߦ଻ᜬߒኒኽߐࠇߚ 241AmO2 ᮡ⊛ߦਛᕈሶࠍᾖ኿ߒ‫ޔ‬3 บ

࿑ 1 ታ㛎ߩ࠮࠶࠻ࠕ࠶ࡊ
this work 241Am(n,!)
this work 241Am(n,f)ߩᶧ૕ࠪࡦ࠴࡟࡯࠲ࠍ↪޿ߡ‫ޔ‬හ⊒ਛᕈሶ߅ࠃ߮හ⊒ γ ✢ࠍ104หᤨᬌ಴ߒߚ‫ޕ‬3 บߩᶧ૕ࠪࡦ࠴࡟࡯࠲ߩ߁ߜ 2 บ߆ࠄߩᤨ

103✢ࠍᬌ಴ߔࠆߎߣߢਛᕈሶ᝝₪ᢿ㕙Ⓧࠍᓧߚ‫ޕ‬ᓧࠄࠇߚ⋧ኻ⊛ߥ෻ᔕᢿ㕙Ⓧߩ߁ߜ╙৻౒㡆ㇱಽߦߟ޿ߡ JENDL-4.0[1]ߩᢿ㕙Ⓧߢⷙᩰൻߒߡ෻ᔕᢿ㕙Ⓧߩ⛘ኻ୯ࠍᓧߚ‫ޕ‬ᓧࠄࠇߚᢿ㕙Ⓧ㧔࿑ 2㧕ࠍ‫ޔ‬JENDL-4.0 ߣᲧセߒߡ޽ࠆ‫ޕ‬

Cross Section / [Barns]㑆Ꮕᖱႎߣߘࠇߙࠇߩᬌ಴ེߩࡄ࡞ࠬᵄᒻߩᖱႎ߆ࠄ‫ޔ‬හ⊒ਛᕈሶࠍᬌ಴ߔࠆߎߣߢᩭಽⵚࠗࡌࡦ࠻ࠍᓧߚ‫ߚ߹ޕ‬හ⊒ γ

102
101
100
10-1
10-2
0.1

㨯ෳ⠨
[1] K. Shibata, O. Iwamoto, T. Nakagawa, N. Iwamoto, A.

JENDL 241Am(n,!)
JENDL 241Am(n,f)

1
Neutron Energy / [eV]1020

࿑ 2 241Am ߩਛᕈሶ⺃⿠ᩭ෻ᔕᢿ

Ichihara, S. Kunieda, S. Chiba, K. Furutaka, N. Otuka, T. Ohsawa, T. Murata, H. Matsunobu, A. Zukeran, S.
Kamada, and J. Katakura: "JENDL-4.0: A New Library for Nuclear Science and Engineering," J. Nucl. Sci.
Technol. 48(1), 1-30 (2011)
Development of the simultaneous measurement of neutron-induced fission and capture cross-sections of theminor actinides.
TAMURA, N .,NISHIO, K.,HIROSE, K.,NISHINAKA, I.,MAKII, H.,KIMURA, A.,HARADA, H.,
OOTA, S.,ANDREYEV,
M.,Gilespire,
S.,Bentley,M.,NAGAYAMA,T.,OOE, K., GOTO,
S., K.,OOTA,
S.,ANDREYEV,A.,Vermeulen,
A.,VERMEULEN,
M.,GILESPIRE,
S.,BENTLEY,M.,NAGAYAMA,T.,OOE,
KUDO, S.,KUDO,
H..
GOTO,
H.

- 134 -

P19

ᅵተヨᩱ୰ࡢ 3X$P㏲ḟศᯒ࡟࠾ࡅࡿ⁐ゎ࡜๓⃰⦰ࡢ㎿㏿໬ࡢ᳨ウ㸦㔠ἑ኱Ꮫ㝔⮬↛㸪㔠ἑ኱⌮ᕤ㔠ἑ኱Ꮫ㝿㸧‫ۑ‬㕥ᮌ㛤Ⓩ㸪ୖᮡṇᶞ㸪ᶓᒣ᫂ᙪ㸪୰すᏕ㻌㸯㸬ࡣࡌࡵ࡟
Pu ཬࡧ Am ࡣ᰾⇿ⓎࡸཎᏊ⅔୰ࡢ᰾⇞ᩱ࡟࠾࠸࡚⏕ᡂࡋࠊ⚟ᓥཎⓎ஦ᨾ࡟࠾࠸࡚ࡶࢃࡎ࠿࡛ࡣ
࠶ࡿࡀࠊ⎔ቃ୰࡟₃ࢀฟࡋࡓࡇ࡜ࡀุ᫂ࡋ࡚࠸ࡿࠋ୍⯡࡟ࠊᅵተヨᩱ୰࡟Ꮡᅾࡍࡿᨺᑕᛶ≀㉁ࡢ
ᐃ㔞ἲࡣࠊ1)ヨᩱࡢ⃰⦰ཬࡧศゎࠊ2)⢭〇ศ㞳ࠊ3) ᐃヨᩱࡢㄪ〇ࠊ4) ᐃࠊ࡜࠸ࡗࡓᕤ⛬ࢆ⤒࡚⾜ࢃࢀࡿࡀࠊࡇ࡜ᚤ㔞ࡢ Pu ࡸ Am ࡢ㏲ḟศᯒ࡟࠾࠸࡚ࡣࠊ⢭〇ศ㞳ࢆ⧞ࡾ㏉ࡋࠊඹᏑࡍࡿጉᐖ≀㉁ࢆ㝖ཤࡍࡿᚲせࡀ࠶ࡿࠋᮏ◊✲࡛ࡣᅵተヨᩱ୰ࡢ Pu ཬࡧ Am ࡢᐃ㔞ศᯒࡢ㎿㏿໬ࢆ┠ⓗ࡜ࡋࠊྛศᯒᕤ⛬࡟Ꮡᅾࡍࡿㄢ㢟ࢆ㡰ḟ᳨ウࡋࠊᨵၿࡍࡿࡇ࡜࡟ࡋࡓࠋࡲࡎᅵተヨᩱࡢ⁐ゎἲࡢ᳨ウࢆ⾜ࡗࡓᚋࠊᢳฟࡋࡓ⁐ᾮࡢ⃰⦰ἲࢆ᳨ウࡋࠊḟ࠸࡛⚟ᓥ┴ࡢ⎔ቃヨᩱ࡟㐺⏝ࡋࡓࠋ㸰㸬ᐇ㦂Ș⥺ࢫ࣌ࢡࢺ࣓ࣟࢺ࣮࡛ࣜࡣࠊヨᩱ୰ࡢ Pu ཬࡧ Am ࢆ᏶඲࡟⁐ゎࡋࠊ཰⋡⿵ṇ⏝ࢺ࣮ࣞࢧ࣮࡜
ᆒ㉁࡟ΰྜࡉࡏࡿᚲせࡀ࠶ࡾࠊ㛗᫬㛫࠿ࡅ࡚ヨᩱࡢศゎ࡜⁐ゎࡀ࡞ࡉࢀࡿࠋࡑࡇ࡛ࠊヨᩱࡢ⁐ゎ࡜⃰⦰ࠊ ᐃヨᩱࡢㄪ〇ἲ࡟↔Ⅼࢆ⤠ࡾࠊᨵၿࢆᅗࡗࡓࠋ
ձ ᅵተヨᩱࡢ⁐ゎἲ㸸ᅵተヨᩱࢆ㎿㏿࡟⁐ゎࡍࡿ᪉ἲ࡜ࡋ࡚ࠊ࢔ࣝ࢝ࣜ⼥ゎἲ࡜◪㓟࢔ࣥࣔࢽ࣒࢘⼥⁐ゎἲࢆヨࡳࡓࠋヨᩱ࡟ 243Am, 242Pu ࢺ࣮ࣞࢧ࣮⁐ᾮࢆຍ࠼ࠊ␗࡞ࡿ⁐ゎ᪉ἲ࡟ࡼࡾ Pu
࡜ Am ࢆ⁐ゎࡋࠊࡇࢀ௨㝆ࡢ᧯సࡣࠊPu ࡜ Am ࡢ㏲ḟศᯒࢆ⾜ࡗࡓࠋղ ᅵተ⁐ฟᾮࢆ᝿ᐃࡋࡓ⁐ᾮࡢ⃰⦰ἲ㸸㧗⃰ᗘࡢ◪㓟⁐ᾮ࠿ࡽ Pu ࡜ Am ࢆ⵨Ⓨ⃰⦰ࡍࡿ࡟ࡣ᫬
㛫ࡀ࠿࠿ࡿࡢ࡛ࠊ௦ࢃࡾࡢ᪉ἲࢆ᳨ウࡋࡓࠋ50mL ࡢ 8M ◪㓟࡟ 243Am, 242Pu ࢺ࣮ࣞࢧ࣮⁐ᾮࢆຍ࠼ࡓ⁐ᾮ࡟㐣࣐ࣥ࢞ࣥ㓟࣒࢝ࣜ࢘ࢆຍ࠼ࠊຍ⇕࡟ࡼࡾ஧㓟໬࣐ࣥ࢞ࣥ࡟྾╔ỿẊࡉࡏࡿ᪉ἲཬࡧ⁐፹ᢳฟἲ࡟ࡘ࠸࡚ Pu ࡜ Am,ࡢᅛ࣭ᾮ⃰⦰ཬࡧᾮ࣭ᾮ⃰⦰ࢆㄪ࡭ࡓࠋ
ճᐃヨᩱࡢㄪ〇㸸ᚑ᮶ࡢ㟁╔ἲࡼࡾࡶ᪩ࡃ ᐃヨᩱࢆㄪ〇ࡍࡿࡓࡵ Sm ඹỿἲࢆ᳨ウࡋࡓࠋ
243
Am ࢺ࣮ࣞࢧ࣮⁐ᾮ࡟ᚤ㔞ࡢ Sm ࢆΰྜࡋࠊ࢔ࣥࣔࢽ࢔Ỉ࡛ሷᇶᛶ࡟ࡋࡓᚋࠊ⏕ᡂࡋࡓỿẊࢆ྾ᘬࢁ㐣ࡋࠊ ᐃヨᩱ࡜ࡋࡓࠋ㸱㸬⤖ᯝձ ᅵተヨᩱࡢ⁐ゎἲ:⾲㸯࡟◪㓟ᾐฟἲ(8M ◪㓟࡛ 2 ᫬㛫ຍ⇕)ཬࡧ࢔ࣝ࢝ࣜ⼥ゎἲࠊ◪㓟࢔ࣥࣔ
ࢽ࣒࢘⼥ゎἲࢆ⚟ᓥࡢ⎔ቃヨᩱ࡟⏝࠸ࡓ᫬ࡢ⤖ᯝࢆ♧ࡍࠋ◪㓟ᾐฟἲࠊ࢔ࣝ࢝ࣜ⼥ゎཬࡧ◪㓟࢔ࣥࣔࢽ࣒࢘ἲࡢฎ⌮᫬㛫ࡣࠊ◪㓟࢔ࣥࣔࢽ࣒࢘ἲ㸺◪㓟ᾐฟἲ㸺࢔ࣝ࢝ࣜ⼥ゎ࡛࠶ࡗࡓࠋղ ᅵተ⁐ฟᾮࢆ᝿ᐃࡋࡓ⁐ᾮࡢ⃰⦰ἲ㸸஧㓟໬࣐ࣥ࢞ࣥ࡟ࡼࡿ᪉ἲ࡛ࡣࠊPu ࡜ Am ࡣ࡜ࡶ࡟⁐ᾮࡢ᪉࡟ศ㓄ࡉࢀ࡚࠾ࡾࠊ஧㓟໬࣐ࣥ࢞ࣥỿẊ࡟ࡣ࡯࡜ࢇ࡝྾╔ࡉࢀ࡞࠿ࡗࡓࠋ୍᪉࡛⁐፹ᢳฟࡢ⤖ᯝࡣ Ⰻዲ࡛࠶ࡗࡓࠋ
ճᐃヨᩱࡢㄪ〇㸸Am ࡣ Sm ࡜ඹỿࡋࠊ ᐃヨᩱࡣ 20 ศ⛬ᗘ࡛సᡂࡍࡿࡇ࡜ࡀ࡛ࡁࡓࡀࠊ࢚
ࢿࣝࢠ࣮ศゎ⬟ࡣ㟁╔ἲ࡛సᡂࡋࡓࡶࡢ࡟኱ࡁࡃຎࡿ⤖ᯝ࡜࡞ࡗࡓࠋ  ⾲ 1 ⁐ゎἲࡢ㐪࠸࡟ࡼࡿᅵተࡢศᯒ⤖ᯝ

Development of rapid dissolution and pre-concentration in sequential analysis of Pu and Am in soil
samplesSUZUKI, K., UESUGI, M., YOKOYAMA,A., NAKANISHI, T.

- 135 -

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Trial production for gamma-ray emitting source applied by a 3D printer.
SAITO, T., KOIKE, Y., SUZUKI, R..

- 136 -

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P22

ᕷ㈍ヨ⸆ࢆ⏝࠸࡚సᡂࡋࡓ᳨ฟຠ⋡᭤⥺࡟ࡼࡿᶆ‽ヨᩱ୰!"!⥺ᨺฟ᰾✀ࡢᐃ㔞᫂኱㝔⌮ᕤ ࠊ᫂἞኱◊✲▱㈈ᡓ␎ᶵᵓ ࠊ᫂኱⌮ᕤ  ‫ۑ‬㕥ᮌு୍㑻 ࠊᯇ⏣΅ ࠊᒾ㰯㞝ᇶ ࠊᰩཎ㞝୍ ࠊ୰ᮧ฼ᘅ ࠊᑠụ⿱ஓ 䛆⥴ゝ䛇㻌 ࢤ࣐ࣝࢽ࣒༙࢘ᑟయ᳨ฟჾࢆ⏝࠸ᐃ㔞ࡍࡿሙྜࠊ᳨ฟჾࡢຠ⋡ᰯṇࡢࡓࡵ࡟᳨ฟຠ⋡᭤⥺ࡢసᡂࡀᚲせ࡜࡞ࡿࠋ㏻ᖖࠊ᳨ฟຠ⋡᭤⥺ࡢసᡂࡣࠊᨺᑕ⬟ᐜ✚⥺※➼ࡢᶆ‽ヨᩱࢆ⏝࠸࡚ γ ⥺

ᐃࢆ⾜࠸ࠊγ ⥺࢚ࢿࣝࢠ࣮࡟ᑐࡋ࡚ຠ⋡ࢆࣉࣟࢵࢺࡍࡿࠋ⟶⌮༊ᇦࢆ᭷ࡍࡿ᪋タ࡛ࡣࠊᨺᑕᛶ≀㉁ࢆ౑⏝࡛ࡁࡿࡓࡵࠊᶆ‽ヨᩱࢆ‽ഛࡍࡿࡇ࡜࡛ᐜ᫆࡟ຠ⋡ᰯṇࢆ⾜࠺ࡇ࡜ࡀ࡛ࡁࡿࠋࡋ࠿ࡋࠊ୍⯡ⓗ࡞᪋タ࡛ࡣᨺᑕᛶ≀㉁ࢆ⏝࠸ࡓ⥺※ࡣ౑⏝࡛ࡁ࡞࠸ࡓࡵࠊ᳨ฟຠ⋡᭤⥺ࡢసᡂࡣ㞴ࡋࡃ࡞ࡿࠋࡑࡇ࡛ࠊ୍⯡ⓗ࡞᪋タෆ࡛౑⏝࡛ࡁࡿᕷ㈍ࡢሷ໬࣒࢝ࣜ࢘ཬࡧࣇ
ࢵ໬ࣛࣥࢱࣥࡢヨ⸆ࢆ⥺※࡜ࡋ࡚⏝࠸ࠊ᳨ฟຠ⋡᭤⥺ࡢసᡂࢆヨࡳࡓࠋసᡂࡋࡓຠ⋡᭤⥺࡟ࡼࡾࠊྵ᭷ᨺᑕᛶ᰾✀⃰ᗘࡀ᪤▱ࡢᶆ‽ヨᩱ࡜ࡋ࡚ࠊᒾ▼ᶆ‽ヨᩱཬࡧᅵተᶆ‽ヨᩱ୰ࡢ γ⥺ᨺฟ᰾✀ࢆᐃ㔞ࡍࡿࡇ࡜࡛ࠊࡑࡢ᭷ຠᛶࢆ᳨ウࡋࡓࠋ䛆ᐇ㦂䛇㻌 ᳨ฟຠ⋡᭤⥺సᡂ⏝ࡢᕷ㈍ヨ⸆࡟ࡣࠊሷ໬࣒࢝ࣜ࢘㸦࿴ග⣧⸆, 99.9%㸧ཬࡧࣇࢵ໬ࣛ
ࣥࢱࣥ㸦㛵ᮾ໬Ꮫ, 99.99%㸧ࢆࠊᶆ‽ヨᩱ࡟ࡣࠊᒾ▼ᶆ‽≀㉁㸦JR-1㸧ཬࡧᅵተᶆ‽≀㉁
㸦IAEA-444㸧ࢆ⏝࠸ࡓࠋヨ⸆ࠊᶆ‽ヨᩱࡣࡑࢀࡒࢀࣈࣜ࢟〇ࢥࣥࢸࢼ㸦34 mmφ × 12 mmH㸧࡟඘ሸࡋࡓࠋᒾ▼ᶆ‽≀㉁ࡣࠊኳ↛ࡢᨺᑕᛶ᰾✀ࢆᐃ㔞ࡍࡿࡓࡵ࡟ࠊ඘ሸᚋᐜჾࢆᐦᑒࡋ࡚
1 ࣨ᭶㛫ᨺ⨨ࡋ࡚ᨺᑕᖹ⾮ࡢ≧ែ࡜ࡋࡓᚋ࡟ γ ⥺ ᐃࢆ⾜ࡗࡓࠋγ ⥺ ᐃ⿦⨨࡟ࡣ㧗⣧ᗘ Ge༙ᑟయ᳨ฟჾ㸦PGT ♫〇㸧ࢆ⏝࠸࡚ࠊࢧ࣒ຠᯝࢆ⪃៖ࡋ᳨ฟჾ࡜ヨᩱ࡜ࡢ㊥㞳ࢆ 6 cm 㞳ࡋࡓ≧ែ࡛ ᐃ࡟౪ࡋࡓࠋ
䛆⤖ᯝ䛇㻌 ᕷ㈍ヨ⸆ࡢ ᐃ⤖ᯝ࠿ࡽసᡂࡋࡓ᳨ฟຠ⋡᭤⥺ࢆ Fig. 1 ࡟♧ࡍࠋ᳨ฟຠ⋡᭤⥺ࡢ࢚ࢿࣝࢠ࣮⠊ᅖࡣ 789 keV ࠿ࡽ 1461 keV ࡛࠶ࡗࡓࡓࡵࠊ
እᤄ࡟ࡼࡗ࡚ 295 keV ࠿ࡽ 1461 keVࡲ࡛࢚ࢿࣝࢠ࣮⠊ᅖࢆᣑᙇࡋࡓࠋᚓࡽࢀࡓ᳨ฟຠ⋡᭤⥺࡟ࡼࡾࠊJR-1 ୰ࡢ࢘ࣛࣥཬࡧࢺࣜ࢘
࣒⣔ิࡢᨺᑕᛶ᰾✀࡜ IAEA-444 ୰ࡢᨺᑕᛶ᰾✀࡟ࡘ࠸࡚ᐃ㔞ศᯒࡋࠊࡑࢀࡒࢀཧ↷್࡜ẚ
㍑ࡋࡓࠋ
඲࡚ࡢ᰾✀࡟࠾࠸࡚ཧ↷್࡜ᐇ್ࡣࡼࡃ୍⮴ࡋ0.01

࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋࡲࡓࠊཧ↷್࡜ࡢẚ㍑࠿ࡽእᤄࡋ
ࡓప࢚ࢿࣝࢠ࣮ഃࡢ ᐃࡶྍ⬟࡛࠶ࡗࡓࠋᕷ㈍ヨ⸆ࢆ⏝࠸࡚సᡂࡋࡓ᳨ฟຠ⋡᭤⥺ࡼࡗ࡚ࠊேᕤᨺᑕᛶ᰾✀Efficiency / -ࡓࡓࡵࠊᕷ㈍ヨ⸆ࢆ⏝࠸࡚సᡂࡋࡓຠ⋡᭤⥺ࡣ᭷ຠ࡛y = 2.514x-1.059

ࡢ 60Co㸦1173 keV,1332 keV㸧 ࡸ 137Cs㸦662 keV䠅䛾䜏䛷䛺䛟ࠊ214Pb㸦295 keV㸧ࡸ 214Bi㸦609 keV㸧࡜࠸ࡗࡓᵝࠎ࡞ᨺᑕᛶ᰾✀ࢆᐃ㔞ࡍࡿࡇ࡜ࡀ࡛ࡁࡓࠋᕷ㈍ヨ⸆ࡢࡳࢆ⏝࠸᳨࡚ฟຠ⋡᭤⥺ࢆసᡂࡍࡿࡇ࡜ࡀ࡛ࡁࡿ
ࡓࡵࠊ୍⯡᪋タෆࡢ᳨ฟჾࡢຠ⋡ᰯṇἲࡢ 1 ࡘ࡜ࡋ࡚

0.001

200

2000

Energy / keV

Fig. 1 Detection efficiency curve of 40K and 138La.
:Detection efficiency curve:Extrapolated detection efficiency curve㐺⏝࡛ࡁࡿ࡜⪃࠼ࡽࢀࡿࠋ
Gamma-ray spectrometry of radionuclides in standard sample with detection efficiency curveusing chemical reagentsSUZUKI, R., MATUDA, W., IWAHANA, Y., KURIHARA, Y., NAKAMURA, T., KOIKE, Y..

- 138 -

7H ࡜ &V ࡢ⛣⾜㔞࡟ S+ ࡀཬࡰࡍᙳ㡪

P23

ி኱⅔ ࠊி኱㸦㎰㸧 ‫⸨ۑ‬ཎ៞Ꮚ ࠊ㧗ᶫ▱அ ࠊᮌ㔝ෆᛅ⛱ ࠊ⚟㇂ဴ ࠊ᭹㒊཭⣖ ࠊ㧗ᶫ༓ኴ㑻 㸪䛆⥴ゝ䛇ཎᏊຊᏳ඲࣭ಖᏳ㝔࡟ࡼࡾᮾி㟁ຊ⚟ᓥ➨୍Ⓨ㟁ᡤࡢ஦ᨾ࡟ࡼࡿ Te-127m ࡢᨺฟ㔞ࡣ
1.1×1015Bq ࡜ሗ࿌ࡉࢀ࡚࠸ࡿࡀࠊᨺᑕᛶ Te ࡢ⎔ቃ୰࡛ࡢᣲື࡟㛵ࡍࡿࢹ࣮ࢱࡣ༑ศ࡜ࡣゝ࠼
࡞࠸ࠋTe-127m ࡢ༙ῶᮇࡣ 109 ᪥࡜ẚ㍑ⓗ㛗ࡃࠊ஦ᨾึᮇ࡟࠾ࡅࡿෆ㒊⿕ࡤࡃ⥺㔞࡟ᐤ୚ࡋ࡚࠸ࡿྍ⬟ᛶࡀ⪃࠼ࡽࢀࡿࡓࡵࠊTe ࡢ⎔ቃ୰࡛ࡢᣲືࢆ☜ㄆࡍࡿᚲせࡀ࠶ࡿࠋᮏ◊✲࡛ࡣࠊ⤒᰿྾཰࡟㛵ࡍࡿᐇ㦂࡟ᗈࡃ฼⏝ࡉࢀ࡚࠸ࡿࣛࢹ࢕ࢵࢩࣗ(Raphanus sativus var. sativus)ࡢỈ⪔᱂ᇵࡢᐇ㦂⣔ࢆ⏝࠸ࠊᏳᐃ Te ࡜ Cs ࡢ⤒᰿྾཰࡜ࠊⴥ࡜᰿࡬ࡢ⛣⾜࣭ỿ╔࡟ࡘ࠸࡚ㄪ࡭ࡓࠋ
≉࡟ࠊTe ࡣ pH5.5 ௜㏆㸦㓟໬㑏ඖ㟁఩㸸200-500mV ௜㏆㸧࡛⁐ᾮ୰ࡢ໬Ꮫᙧࡀኚ໬ࡍࡿ࡜ࡉ
ࢀ࡚࠸ࡿࡇ࡜࠿ࡽࠊ⤒᰿྾཰᫬࡟࠾ࡅࡿᇵᆅࡢ pH ࡢᙳ㡪࡟ࡘ࠸᳨࡚ウࡋࡓࠋ䛆ᐇ㦂䛇ࣛࢹ࢕ࢵࢩࣗࡣⓎⱆ 1 㐌㛫ᚋ࡟Ỉ⪔᱂ᇵࡢᇵᆅ㸦1 mM Ca(NO3)2, 1 mM KCl, 0.5 mM
MgSO4, 0.25 mM (NH4)2HPO4, 0.18 mM Fe(III)-EDTAࠊ46 μM H3BO3, 9 μM MnCl2, 0.8 μM ZnSO4,
0.3 μM CuSO4, 0.08 μM (NH4)6Mo7O24) ࡬⛣ࡋࠊᬯ 8 ᫬㛫ࠊ᫂ 16 ᫬㛫ࠊ ᗘ 22Υ࡛ 2-3 㐌㛫⏕⫱ࡋࡓࠋTe ᶆ‽⁐ᾮ࡜ CsCl ࢆ 1.0ppm㸦pH3.2-3.8 ࡜ pH6.6-6.8㸧࡟ㄪᩚࡋࡓ⁐ᾮ࡟㸰᫬㛫ᾐࡋࠊࡍࡍ࠸ࡔᚋࠊᇵᆅ࡟ᡠࡋ 7 ཬࡧ 10 ᪥ᚋ࡟཰✭ࡋࡓࠋ࡞࠾ࠊpH ㄪᩚࡣ NH3(aq)࡟ࡼࡾ⾜ࡗࡓࠋ཰✭ࡋࡓࣛࢹ࢕ࢵࢩࣗࡣⴥ࡜᰿࡟ศࡅࡓᚋࠊ஝⇱ࡋࠊ70% HNO3ࠊ30% H2O2 ࢆ⏝࠸࡚‵ᘧ⅊໬ࡋࡓࠋヨᩱࡣᕼ㔘ᚋࠊICP-MS(HP-4500, Yokogawa, and Element 2, Thermo Fisher Scientific)࡛
ᐃࡋࡓࠋ䛆⤖ᯝ䞉⪃ᐹ䛇pH3.2-3.8 ࡢ Te ࡜ Cs ⁐ᾮ࡟ᾐₕࡋࡓሙྜࠊ᳜≀ࡢಶయ㛫࡛཰✭ᚋࡢ Te࣭Cs ⃰ᗘࡢࡤࡽࡘࡁࡀ࠿࡞ࡾ኱ࡁࡃࠊ┦ᑐᶆ‽೫ᕪ㸦RSD㸧ࡣ 4-117㸣࡛࠶ࡗࡓࠋࡑࢀ࡟ᑐࡋࠊpH6.6-6.8
ࡢሙྜ࡛ࡣࠊࡤࡽࡘࡁࡀᑠࡉࡃ RSD ࡣ 6-17㸣࡛࠶ࡗࡓ㸦Table 1㸧ࠋ⃰ᗘ࡟ࡘ࠸࡚ࡣࠊ㓟ᛶࡢሙྜࡢ᪉ࡀ Te ࡜ Cs ඹ࡟పࡃࠊ୰ᛶ௜㏆࡛ࡣᏳᐃࡋ࡚ Te ࡜ Cs ࡢ୧᪉ࡀ᳜≀࡟⛣⾜ࡍࡿ࡜ศ࠿ࡗࡓࠋࡇࡢ⤖ᯝࡣࠊ㓟ᛶᅵተ࡟ẚ࡭୰ᛶ௜㏆ࡢ pH ࡟ㄪᩚࡉࢀࡓ⏿࡟࠾࠸࡚ Te ࡜ Cs ඹ࡟᳜≀࡬ࡢ⛣⾜㔞ࡀቑ࠼ࡿྍ⬟ᛶࢆ♧ࡋ࡚࠾ࡾࠊ஦ᨾึᮇ࡟࠾ࡅࡿෆ㒊⿕ࡤࡃ⥺㔞ࡢ᥎ ࡟࠶ࡓࡗ࡚ pH ࡢኚ໬ࡀ᳜≀࡬ࡢ⛣⾜㔞࡟ᙳ㡪ࡍࡿࡇ࡜ࢆ♧၀ࡋ࡚࠸ࡿࠋ
Table 1 Average of concentration of Te and Cs
nuclide
Te
Cs
Te
Cs
Te
Cs
Te
Cs

interval to harvest (day)
7

10

7

10

part
root
leaf
root
leaf
root
leaf
root
leaf
root
leaf
root
leaf
root
leaf
root
leaf

pH

7

3.5

Te-mg/dry-mg (ppm)
5.7±㻌 0.345.4±㻌 0.49
117.8±㻌 14.09
160.5±㻌 10.88
5.3±㻌 0.53
5.6±㻌 0.5484.9±㻌 14.66
130.2±㻌 20.80
3.5±㻌 4.110.8±㻌 0.04
1.05±㻌 0.481.12±㻌 0.134.33±㻌 2.880.77±㻌 0.310.51±㻌 0.401.12±㻌 0.43

RSD㻌 (%)
6
9
12
7
10
10
17
16
117
4
46
11
66
40
79
38

Effect of pH on the Uptake and Retention of Tellurium and Cesium in Radish (Raphanus sativus
var. sativus) Cultured under Hydroponic Condition
FUJIWARA, K., TAKAHASHI, T., KINOUCHI, T., FUKUTANI, S., HATTORI, Y. and TAKAHASHI,
S.

- 139 -

P24

㛗㔝┴ᮾ໭ಙᆅᇦ࡟࠾ࡅࡿᨺᑕᛶࢭࢩ࣒࢘ࡢືែ ಙᕞ኱㝔 ࠊಙᕞ኱ᩍ⫱ ࠊ㔝ᑼ†ࢼ࣐࢘ࣥ༤  ‫ۑ‬ᯇᑿᾏ ࠊᑠᯇ୍ᡂ ࠊᮧᯇஂ࿴  ࠊ㏆⸨ὒ୍ 䛆䛿䛨䜑䛻䛇㻌
2011 ᖺ 3 ᭶ 11 ᪥࡟Ⓨ⏕ࡋࡓᮾ໭ኴᖹὒἈᆅ㟈࡟కࡗ࡚㉳ࡁࡓᮾி㟁ຊ⚟ᓥ➨୍ཎᏊ
ຊⓎ㟁ᡤࡢ஦ᨾ࡟ࡼࡗ࡚⎔ቃ୰࡟ᨺᑕᛶ᰾✀ࡀᨺฟࡉࢀࡓࠋࡑࡢ୰ࡢ୍㒊 ࡣ㛗㔝┴ᮾ㒊ࡸ໭㒊࡟ࡲ࡛ᒆ࠸࡚࠸ࡿࠋᮏ◊✲࡛ࡣᨺᑕᛶࢭࢩ࣒࢘ࡢᵝࠎ࡞ヨᩱ୰ࡢ ⃰ᗘࢆ ᐃࡍࡿࡇ࡜࡛ࠊࡑࢀࡽࡢ⎔ቃ୰࡛ࡢືែࢆㄪ࡭ࡿࡇ࡜ࢆ┠ⓗ࡜ࡍࡿࠋ 㻌䛆◊✲᪉ἲ䛇㻌
᳜≀ヨᩱ࡜ࡋ࡚ࠊ2011 ᖺᗘ࠿ࡽᩍ⫱Ꮫ㒊࢟ࣕࣥࣃࢫෆ࡛࢖ࣟࣁ࣑ࣔࢪ (௨ୗ࣑ࣔࢪ)ࠊ
࢖ࢳࣙ࢘ࠊࢡࢾࢠࠊࢫࢬ࢝ࢣࡢⴠࡕⴥࢆ᥇㞟ࡋࡓࠋ2012 ᖺᗘࡼࡾⱝⴥ࡜ⴠࡕⴥࡢ୧᪉
ࢆ⥅⥆ⓗ࡟᥇㞟ࡋࡓࠋࡲࡓࠊ࣑ࣔࢪ࡟╔┠ࡋ࡚ࠊ2012 ᖺᗘࡼࡾ᥇㞟Ⅼࢆቑࡸࡋࠊ3 Ⅼ᥇㞟ࡋࡓࠋࡇࢀࡽࡢⴥࢆᩥ㒊⛉Ꮫ┬Ⓨ⾜ࡢ⎔ቃヨᩱ ᐃἲ࡟ᚑ࠸ࠊ105Υ୍࡛᫨ኪ஝⇱ࡉࡏࡓࡢࡕ 400Υ࡛Ⅳ໬ࠊ⅊໬ࡋ ᐃヨᩱ࡜ࡋࡓࠋᅵተヨᩱࡣྛᶞᮌࡢ᰿ඖ࡜㛗㔝┴ෆᮾ໭ಙᆅᇦ࠿ࡽ᥇ྲྀࡋࡓࠋࡲࡓࠊᒣᓅᆅᇦࡢᅵተヨᩱ࡜ࡋ࡚ࠊᩬᑿᒣࡢᅵࢆ᥇ྲྀࡋࡓࠋ
ࡇࢀࡽࡣ 105Υ୍࡛᫨ኪ஝⇱ࡢࡢࡕ⠠࡟࠿ࡅ࡚᰿ࡸ▼ࢆ㝖ࡁ ᐃヨᩱ࡜ࡋࡓࠋ⏕≀ヨᩱ࡜ࡋ࡚ࠊ2012 ཬࡧ 2014 ᖺᗘ࡟ࣈࣛࢵࢡࣂࢫࠊ2013 ᖺᗘ࡟࣡࢝ࢧࢠࢆ㔝ᑼ†ࡼࡾ᥇ྲྀࡋࡓࠋฎ⌮᪉ἲࡣ᳜≀࡜ྠᵝ ࡜ࡋࡓࠋヨᩱ࠿ࡽࡢȚ⥺ࡣࠊCANBERRA ♫〇࡜ ORTEC♫〇ࡢ㧗⣧ᗘ Ge ༙ᑟయ᳨ฟჾࢆ⏝࠸࡚ 100000~200000sec ⛬ᗘ ᐃࡋࠊ 134 Cs ࡜ 137Csࠊ
40
K ࡢ⃰ᗘࢆồࡵࡓࠋ᳨ฟຠ⋡ࡣ 152Eu ࢆ⏝࠸࡚ྠ୍ᙧ≧ࡢヨᩱࢆసᡂࡋ࡚ồࡵࡓࠋ㻌䛆⤖ᯝ䛸⪃ᐹ䛇㻌 ᅗ 1 ࡟ࠊ᳜≀ࡢᖺᗘู 134 Cs ࡢ஝⇱㔜㔞ᙜࡓࡾࡢ⃰ᗘࢆ♧ࡋࡓࠋ(2011 ᖺⴠࡕⴥࡣ್ ࡀ㧗 ࠸ࡢ ࡛ 㝖࠸࡚࠶ࡿࠋ)඲య࡜ࡋ࡚⃰ᗘࡣῶᑡࡢഴྥ࡟࠶ࡿ୍᪉ࠊᶞ✀࡟ࡼࡗ࡚ࠊ
ⴠࡕⴥ࡟࡞ࡿ࡜ⱝⴥࡢ᫬࡟ẚ࡭࡚⃰ᗘࡀୖ᪼ࡍࡿࡶࡢࡶ࠶ࡿࠋᶞ✀ࡈ࡜࡟ࡑࢀࡒࢀࡢ
≉ᛶࡀ࠶ࡿࡇ࡜ࡀண᝿ࡉࢀࡿࡇ࡜࡟ຍ࠼࡚ࠊ
௒ᖺᗘࡢⴥ࡟ࡘ࠸࡚ࡢ⤖ᯝ࡜ẚ㍑ࡋ࡚ࡉࡽᅗ 1 ᳜≀୰ࡢᖺᗘู 134 Cs ⃰ᗘ࡟᳨ウࡍࡿࠋ
 ᅗ 2 ࡟ᩬᑿᒣࡢᶆ㧗ู 134 Cs ⃰ᗘࢆ♧ࡋࡓࠋᶆ㧗ࡀୖࡀࡿ࡜⃰ᗘࡶ㧗ࡃ࡞ࡿഴྥࡀ
ぢࡽࢀࡿࡀࠊᒣ㡬࡛ࡢ⃰ᗘࡀప࠸࡞࡝ࠊᶆ
㧗࡜┦㛵ࡀ࠶ࡿ࠿࡝࠺࠿ࡣ୙࡛᫂࠶ࡿࠋ
ᐃࡉࢀࡓᅵተ࡬ࡢỿ╔㔞࡜⚟ᓥཎⓎ࠿ࡽᨺฟࡉࢀࡓ 134 Cs ࢆྵࡴࣉ࣮࣒ࣝࡀὶධࡋࡓ
᪉ྥࡸ㧗ᗘࠊᙜ᫬ࡢ㝆㞵㔞࡜ࡢ㛫࡟ఱࡽ࠿ᅗ 2 ᩬᑿᒣᶆ㧗ู 134 Cs ⃰ᗘࡢ㛵ಀࡀ࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋᶆ㧗ࡢ␗࡞ࡿᒣᓅᆅᇦ࠿ࡽࡶᅵተࢆ᥇ྲྀࡋࠊẚ㍑᳨ウࡍࡿᚲせࡀ࠶ࡿࠋࡲࡓࠊ㛗㔝┴ᮾ໭ಙᆅᇦࡢᅵተ
࣐ࢵࣉ࡟ࡘ࠸࡚ࡶⓎ⾲ࡍࡿࠋThe behavior of radioactive cesium in the northern and eastern region of Nagano prefecture
Matsuo, K., Komatsu, K., Muramatsu, H., Kondo, Y.

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ᮾி㟁ຊ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾᚋ䛾ከᦶᕝ㞟Ỉᇦ䛻䛚䛡䜛ᨺᑕᛶ䝉䝅䜴䝮

P25䛾䝰䝙䝍䝸䞁䜾㻌
(᫂኱㝔⌮ᕤ 1䚸᫂኱◊✲䞉▱㈈ᡓ␎ᶵᵓ 2䚸⚟ᓥ኱Ꮫ FURE3䚸᫂኱⌮ᕤ 4)䕿㟷ᯘㄹ 1䚸ᰩཎ㞝୍ 2䚸ᒾ㰯㞝ᇶ 1䚸㔝ᕝ᠇ኵ 3䚸୰ᮧ฼ᘅ 4䚸ᑠụ⿱ஓ 4䛆⥴ゝ䛇 2011 ᖺ 3 ᭶䛻Ⓨ⏕䛧䛯ᮾி㟁ຊᰴᘧ఍♫⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾ䛻䜘䜚䚸ཎᏊ⅔ෆ
䛾ᨺᑕᛶ≀㉁䛜ᨺฟ䛥䜜䚸⎔ቃởᰁ䜢ᘬ䛝㉳䛣䛧䛯䚹⎔ቃ୰䛻ᨺฟ䛥䜜䛯ᨺᑕᛶ≀㉁䜢ᐃ㔞ⓗ䛻ᢕᥱ䛩䜛䛣䛸䛿䚸㝖ᰁ䜔஦ᨾⓎ⏕᫬䛾㎿㏿䛺ᑐᛂ䛻⧅䛜䜛䛯䜑㔜せ䛷䛒䜛䚹ᮏ◊✲䛷䛿䚸ከᦶᕝ㞟Ỉᇦ䛻䛚䛡䜛ἙᕝỈ䛚䜘䜃ᗏ㉁୰䛾ᨺᑕᛶ䝉䝅䜴䝮䛾ᐃ㔞ศᯒ䜢⾜䛔䚸Ἑᕝ㞟Ỉᇦ䛷䛾ᨺᑕᛶ䝉䝅䜴䝮䛾ᣲື䜢㏣䛳䛯䚹ἙᕝỈ୰䛾⁐Ꮡែᨺᑕᛶ䝉䝅䜴䝮䛿䝸䞁䝰䝸䝤䝕䞁㓟䜰䞁䝰䝙䜴䝮 (AMP)䛷ணഛ⃰⦰䛧䛶䛛䜙 ! ⥺ ᐃ䛻䜘䜚ᐃ㔞䛧䛯䚹䛆ᐇ㦂䛇 2013 ᖺ 6 ᭶䛻ከᦶᕝୖὶᇦ (U1 䛛䜙 U6)䚸2013 ᖺ 8 ᭶䛻ከᦶᕝୗὶᇦ (D1 䛛䜙 D5)䚸2013 ᖺ 11 ᭶䛻ከᦶᕝ୰ὶᇦ (M1 䛛䜙 M4) 䛾ィ 15 ᆅⅬ䛷 100 L 䛾Ỉヨᩱཬ䜃ᗏ㉁䜢᥇ྲྀ䛧䛯䚹᥇ྲྀ䛧䛯Ỉヨᩱ䛿䚸ᐃ㔞ℐ⣬ 5C (⢏Ꮚಖᣢ⬟ 1 μm) 䜢⏝䛔䛶྾ᘬℐ㐣䜢⾜䛔䚸ᠱ⃮≀㉁䜢ྲྀ䜚㝖䛔䛯䚹ℐᾮ (5 L) 䛻ሷ㓟 30 mL 䛸 AMP 2 g 䜢ຍ䛘䛶 1 ᫬㛫ᨩᢾ䛧䛯䚹୍ᬌ㟼⨨䛧䛶䛛䜙䝕䜹䞁䝔䞊䝅䝵䞁䜢⾜䛔䚸ṧ䜚䛾ℐᾮ䜢ᐃ㔞ℐ⣬ 5B (⢏Ꮚಖᣢ⬟ 4 μm) 䜢⏝䛔䛶⮬↛ℐ㐣䛻䜘䜚䚸AMP 䜢ᅇ཰䛧䛯䚹ℐ⣬䛿 U-8 ᐜჾ䛻ワ䜑䚸㧗⣧ᗘ䝀䝹䝬䝙䜴䝮༙ᑟయ᳨ฟჾ䛷 ! ⥺ ᐃ䜢⾜䛳䛯䚹᥇ྲྀ䛧䛯ᗏ㉁䛿 105°C 䛷஝⇱ᚋ䚸U-8 ᐜჾ䛻㧗䛥 5 cm 䛻䛺䜛䜘䛖䛻ワ䜑䛶䚸㧗⣧ᗘ䝀䝹䝬䝙䜴䝮༙ᑟయ᳨ฟჾ䛷 ! ⥺ ᐃ䜢⾜䛳䛯䚹䛆⤖ᯝ䛸⪃ᐹ䛇 ከᦶᕝ㞟Ỉᇦ䛻䛚䛡䜛ᨺᑕᛶ䝉䝅䜴䝮䛾ᨺᑕ⬟⃰ᗘ䜢 Table 1 䛻♧䛩䚹ୖὶᇦ䛷䛒䜛ዟከᦶᆅᇦ䛾ἙᕝỈ୰䛻䛿ཎⓎ⏤᮶䛾ᨺᑕᛶ䝉䝅䜴䝮䛿ṧᏑ䛧䛶䛔䛺䛔ྍ⬟ᛶ䛜㧗䛟䚸ୗὶ䛷 134Cs, 137Cs 䛜᳨ฟ䛥䜜䛶䛔䜛䛣䛸䛛䜙䚸ୖὶ䛾ᨺᑕᛶ䝉䝅䜴䝮䛿ୗὶ䛻⛣⾜䛧䛶䛔䜛䛸⪃䛘䜙䜜䜛䚹ୗὶᇦ䛾⁐Ꮡែᨺᑕᛶ䝉䝅䜴䝮䛾ᨺᑕ⬟⃰ᗘ䛿㢧ⴭ䛺ᕪ䛿䛺䛟䚸Ἑཱྀ䛛䜙䛒䜛୍ᐃ䛾㊥㞳䜎䛷䛿ᨺᑕᛶ䝉䝅䜴䝮䛜⁫␃䛧䛶䛔䜛䛸⪃䛘䜙䜜䜛䚹
Table 1 Activity concentrations of radiocesium in Tamagawa River watershed.
Sampling Locations

Dissolved fraction
Activity concentration / mBq L -1
134

U1
U2
U3
U4
U5
U6
M1
M2
M3
M4
D1
(June)
D1(August)D1 (November)
D2
D3
D4
D5

Cs

N.d. (0.5)
N.d. (0.6)
N.d. (0.6)
N.d. (0.6)
N.d. (0.7)
N.d. (1.1)
N.d. (0.5)
2.8 ± 0.2 (0.6)
N.d. (0.5)
N.d. (0.5)
3.3 ± 0.3 (0.8)
3.9 ± 0.3 (0.8)
2.1 ± 0.3 (0.8)
4.0 ± 0.3 (0.7)
1.4 ± 0.2 (0.7)
4.4 ± 0.3 (0.8)
5.2 ± 0.3 (0.9)

137

Cs

N.d. (0.6)
N.d. (0.6)
N.d. (0.7)
N.d. (0.6)
N.d. (1.0)
N.d. (1.0)
N.d. (0.8)
7.4 ± 0.4 (1.1)
N.d. (0.8)
2.3 ± 0.3 (0.9)
7.5 ± 0.4 (1.1)
8.6 ± 0.4 (1.1)
5.5 ± 0.4 (1.1)
9.1 ± 0.4 (1.2)
3.4 ± 0.3 (0.9)
9.2 ± 0.4 (1.3)
12.7 ± 0.5 (1.4)

Sediment
Activity concentration / Bq kg-1
134

Cs

N.d. (3.1)
N.d. (8.0)
N.d. (4.6)
N.d. (3.6)
11.4 ± 1.3 (4.7)
7.7 ± 1.3 (3.9)
N.d. (2.0)
10.8 ± 1.3 (3.8)
N.d. (3.5)
N.d. (1.9) *29.7 ± 1.6 (1.1)
35.4 ± 1.8 (4.4)
19.8 ± 1.9 (5.6)
15.1 ± 1.2 (4.0)
30.2 ± 1.6 (4.8)
4.8 ± 1.3 (4.6)
87.8 ± 2.7 (8.2) *N.d.; Not detected, ( ); Detection limit, *; the soils collected around the sampling point
U; Upstream, M; Midstream, D; Downstream

137

Cs

N.d. ( 3.5)
7.0 ± 1.3 ( 4.1)
11.8 ± 1.5 ( 4.4)
N.d. ( 3.8)
27.1 ± 2.3 ( 5.1)
21.3 ± 2.2 ( 6.5)
N.d. ( 3.3)
24.9 ± 2.0 ( 6.0)
8.9 ± 1.5 ( 4.4)
6.2 ± 0.9 ( 2.7) *52.7 ± 2.9 ( 1.1)
65.9 ± 3.2 ( 3.9)
45.5 ± 3.2 ( 9.5)
27.6 ± 2.0 ( 4.1)
60.7 ± 3.0 ( 4.5)
10.0 ± 1.9 ( 5.1)
183.5 ± 4.5 (13.6) *Monitoring of radiocesium in Tamagawa River watershed after Tokyo Electronic Power Company’s
Fukushima Dai-ichi Nuclear Power Plant Accident
AOBAYASHI, R., KURIHARA, Y., IWAHANA, Y., NOGAWA, N., NAKAMURA, T., KOIKE, Y.

- 141 -

P26

ᮾ᪥ᮏ࡟࠾ࡅࡿᅵተ୰ 129I ⃰ᗘ 㸫⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾࡢᙳ㡪㸫᪥ᮏศᯒࢭࣥࢱ࣮ ‫ۑ‬ᒣ㐨⨾࿴Ꮚࠊ኱ᮌၿஅࠊకሙ㕥ᜨࠊኴ⏣⿱஧䛆䛿䛨䜑䛻䛇㻌 㻌 2011 ᖺ 3 ᭶ࡢ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾ࡟ࡼࡾ⎔ቃ୰࡟ᨺฟࡉࢀࡓ 129I㸦༙ῶᮇ㸸
1,570 ୓ᖺ㸧ࡢ⵳✚≧ἣࢆホ౯ࡍࡿࡓࡵࠊᮾ᪥ᮏ࡛᥇ྲྀࡉࢀࡓ஦ᨾ๓㸦2010 ᖺ㸧ཬࡧ஦ᨾᚋ㸦2012ᖺ㸧ࡢᅵተ㸦᥇ྲྀ῝ᗘ㸸0㹼5cm㸧୰ࡢ 129I ⃰ᗘࢆຍ㏿ჾ㉁㔞ศᯒἲ࡟ࡼࡾᐃ㔞ࡋࡓࠋㄪᰝᆅᇦࡣ
㛵ᮾᆅ᪉ 7 㒔┴㸦Ⲉᇛ┴ࠊᰣᮌ┴ࠊ⩌㤿┴ࠊᇸ⋢┴ࠊ༓ⴥ┴ࠊᮾி㒔ࠊ⚄ዉᕝ┴㸧ཬࡧᮾ໭ᆅ᪉
3 ┴㸦ᒾᡭ┴ࠊᐑᇛ┴ࠊ⚟ᓥ┴㸧࡛࠶ࡿࠋ䛆ศᯒ᪉ἲ䛇 ஝⇱ᅵተ୰ࡢࣚ࢘⣲ࢆ⇞↝ἲ࡟ࡼࡾ࢔ࣝ࢝ࣜ⁐ᾮ࡟ᤕ㞟ࡋࡓࠋࡇࡢ⁐ᾮࡢ୍㒊ࢆศྲྀࡋࠊICP-MS ࡛Ᏻᐃࣚ࢘⣲㸦127I㸧ࢆᐃ㔞ࡋࡓࠋṧࡾࡢ⁐ᾮ࡟ࣚ࢘⣲ᢸయࢆຍ࠼ࠊ⁐፹ᢳฟ࡟ࡼ
ࡾࣚ࢘⣲ࢆศ㞳࣭⢭〇ᚋࠊࣚ࢘໬㖟ࢆㄪ〇ࡋࡓࠋࡇࢀࢆࢱ࣮ࢤࢵࢺ࡜ࡋࠊ
㸦⊂㸧᪥ᮏཎᏊຊ◊✲㛤
Ⓨᶵᵓࡢຍ㏿ჾ㉁㔞ศᯒ⿦⨨ࢆ⏝࠸࡚ࣚ࢘⣲ࡢཎᏊᩘẚ㸦129I/127I㸧ࢆᐃࡋࠊ129I ⃰ᗘࢆ⟬ฟࡋࡓࠋ䛆⤖ᯝཬ䜃⪃ᐹ䛇 ㄪᰝᆅⅬࡢᅵተ୰ 129I ⃰ᗘࡣࠊ஦ᨾ๓࡛ࡣ 0.067㸦⩌㤿┴㸧㹼1.6㸦ᰣᮌ┴㸧㸦mBq/kg஝ᅵ㸧࡛࠶ࡾࠊ஦ᨾᚋ࡛ࡣ 0.18㸦༓ⴥ┴㸧㹼2.0㸦⚟ᓥ┴㸧㸦mBq/kg ஝ᅵ㸧࡛࠶ࡗࡓࠋ஦ᨾ๓࡜஦
ᨾᚋࡢ 129I ⃰ᗘࢆẚ㍑ࡍࡿ࡜ࠊ0.04㸦༓ⴥ┴㸧㹼1.4㸦⚟ᓥ┴㸧㸦mBq/kg ஝ᅵ㸧⛬ᗘࡢቑຍࡀぢࡽࢀࠊ஦ᨾ๓ᚋࡢ⃰ᗘẚࡣ 1.2㹼3.6 ࡛࠶ࡾࠊ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾࡢᙳ㡪ࡀ࠶ࡗࡓ࡜⪃࠼ࡽࢀࡓࠋཧ⪃࡜ࡋ࡚ࠊࠕᮾி㟁ຊ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾ࡟ࡼࡿ⎔ቃࣔࢽࢱࣜࣥࢢ➼ࢹ࣮ࢱ࣮࣋ࢫࠊ
ࣚ࢘⣲ 129 ࡢศᯒࢆ㏻ࡌࡓᅵተ୰ࣚ࢘⣲ 131 ࡢᨺᑕ⬟⃰ᗘศᯒ⤖ᯝ㸦ᮧᯇࡽ㸧ࠖࡢࢹ࣮ࢱ࡟ࠊ⚟ᓥᕷෆࡢᅵተ୰ࡢ 129I ࡣ 0.51㹼3.5㸦mBq/kg㸧࡜ࡢሗ࿌ࡀ࠶ࡿࠋ௒ᅇศᯒࡋࡓ⚟ᓥᕷࡢᅵተ୰ 129I ⃰ᗘࡣ 2.0㸦mBq/kg ஝ᅵ㸧࡛࠶ࡾࠊᮧᯇࡽࡢሗ࿌್ࡢ⠊ᅖෆ࡛࠶ࡗࡓࠋ࡞࠾ࠊⲈᇛ┴㸦ᮾᾏᮧ㸧࡟ࡘ࠸࡚ࡣᮾᾏᮧ෌ฎ⌮᪋タࡢᙳ㡪࡟ࡼࡾࠊ஦ᨾ๓࠿ࡽ௚ࡢᆅᇦ࡜ẚ㍑ࡋ࡚ 129I ⃰ᗘࡀ㧗࠸ഴྥ࡟࠶ࡿࡓࡵࠊ஦ᨾ࡟㉳ᅉࡍࡿ 129I ⃰ᗘࡢୖ᪼ࡣ☜ㄆฟ᮶࡞࠿ࡗࡓࠋ㸦ᅗཧ↷㸧 Ⲉᇛ┴ࢆ㝖࠸ࡓᅵተ୰ 129I/127I ཎᏊᩘẚࡣࠊ஦ᨾ๓࡛ࡣ 6.110-10㸦⩌㤿┴㸧㹼1.110-8㸦ᒾᡭ┴㸧࡛࠶ࡾࠊ஦ᨾᚋࡣ 1.210-9㸦⩌㤿┴㸧㹼3.210-8 㸦⚟ᓥ┴㸧࡜ࢃࡎ࠿࡞ࡀࡽୖ᪼ࡀぢࡽࢀࡓࠋ௒ᅇࡢㄪᰝ࡛ࡣᮾ᪥ᮏ 10 㒔┴ࢆᑐ㇟࡜ࡋ࡚ᐇ᪋ࡋࡓࡀࠊ௒ᚋࡶᘬ
ࡁ⥆ࡁ௚ࡢ㐨ᗓ┴࡟ࡘ࠸࡚ࡶ 129I
⃰ᗘࢆㄪᰝࡋࠊ
඲ᅜࡢ 129I ࡢศᕸࠊ⵳✚≧ἣཬࡧ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾࡢᙳ㡪➼ࢆᢕᥱࡍࡿணᐃ࡛
࠶ࡿࠋᮏㄪᰝࡣࠊཎᏊຊつไᗇࡢጤク஦ᴗࠕᖹᡂ 25 ᖺᗘ⎔ቃᨺᑕ⬟Ỉ‽ㄪᰝࠖࡢ୍㒊࡜ࡋ࡚ᐇ᪋ࡋࡓࠋ
I-129 concentration in soil samples collected at East Japan area          - Influence of the Fukushima Daiichi nuclear plant accident –YAMAMICHI,; OHKI,
Yoshiyuki S.,; BAMBA,; OHTA, Yuji
YAMAMICHI,Miwako
M., OHKI,
Y., BAMBA,
OHTA, SuzueY.

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P27

⢓ᅵ㉁ᅵተࢆྵࡴᨺᑕ⬟ởᰁỈࡢᨺᑕ⬟ᐃࡢヨࡳ 㜰኱㝔ᕤ ‫▮ۑ‬㔝భᶞࠊᅗᏊ┤ᇛࠊబ⸨ᩥಙࠊຍ⸨⿱ྐࠊ㣤⏣ᩄ⾜䛆䛿䛨䜑䛻䛇㻌 ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤࡢ஦ᨾ࡟ࡼࡗ࡚኱㔞ࡢᨺᑕᛶ≀㉁ࡀ⎔ቃ୰࡟ᨺฟࡉࢀ㸪ࡇࡢᨺᑕᛶ≀㉁࡟ࡼࡿ⎔ቃởᰁࡀ኱ࡁ࡞ၥ㢟࡜࡞ࡗ࡚࠸ࡿࠋ≉࡟㣧㣗≀ࡢᨺᑕ⬟ởᰁ࡟ᑐࡋ࡚
ࡣᅜẸࡢ㛵ᚰࡀ㧗ࡃ㸪౛࠼ࡤ㸪⚟ᓥ┴࡛ࡣ⏘⡿ࡢ඲㔞඲⿄ᨺᑕ⬟᳨ᰝࡀᐇ᪋ࡉࢀ࡚࠸ࡿࠋࡇ
ࡢࡼ࠺࡞⫼ᬒ࡟ࡼࡾ㸪ᵝࠎ࡞ゅᗘ࠿ࡽ㎰స≀ࡢ⏕⫱⎔ቃ࡟࠾ࡅࡿᨺᑕ⬟ởᰁࡢᙳ㡪࡟ᑐࡍࡿ◊✲ࡀᐇ᪋ࡉࢀ࡚࠸ࡿࠋᮏ◊✲࡛ࡣ㸪㎰స≀ࡢ⏕⫱⎔ቃࡢᇶᮏせ⣲࡛࠶ࡿ⢓ᅵ㉁ᅵተࢆྵࡴ
ᨺᑕᛶࢭࢩ࣒࢘ởᰁỈࡢᨺᑕ⬟ศᯒࢆヨࡳࡓࠋ䛆 ᐃ᪉ἲ䛇 ศᯒᑐ㇟ࡢởᰁỈࡣ⚟ᓥ࡛᥇ྲྀࡋࡓᨺᑕᛶࢭࢩ࣒࢘ởᰁᅵተ࡟㠀ởᰁỈࢆຍ࠼ࡿࡇ࡜࡛స〇ࡋࡓࠋᚤ⣽ᅵተࢆྵࡴởᰁỈࡢྛᡂศࡢᨺᑕ⬟⃰ᗘࢆㄪ࡭ࡿ┠ⓗ࡛㸪ඛࡎࡣ㸪ᐃᑐ㇟ࡢᅵተࡢ᭱኱⢏ᚄࢆ 300µm ࡜ࡋࡓࠋᐇ㦂ࡢὶࢀࢆᅗ 1 ࡟♧ࡍࠋࡲࡎ㸪ࡩࡿ࠸࡟࠿ࡅ
࡚㑅ูࡋࡓ⢏ᚄࡀ 300µm ௨ୗࡢᅵተ⢏Ꮚࢆࡉࡽ࡟ 125µm ࡢࡩࡿ࠸࡟࠿ࡅ㸪300µm㹼125µm ࠾ࡼࡧ 125µm ௨ୗࡢᅵተ⢏Ꮚ࡟ศ⣭ࡋࡓࠋ125µm ௨ୗࡢᅵተ⢏Ꮚ࡟Ỉࢆຍ࠼㸪ᅵተ⢏ᏊࢆྵࢇࡔởᰁỈࢆస〇ࡋࡓࠋࡇࡢởᰁỈࢆಖᣢ⬟ࡀ 25µm㹼20µm ࡢࢁ⣬࡛ࢁ㐣ࡋ㸪125µm㹼25µm ࡢᅵተ⢏Ꮚ࡜ 25µm ௨ୗࡢᅵተᚤ⢏ᏊࢆྵࡴởᰁỈ࡟ศ㞳ࡋࡓࠋᅵተᚤ⢏ᏊࢆྵࡴởᰁỈ࡟ᑐࡋ࡚࢔࣑ࣝࢽ࣒࢘㟁ᴟࢆ౑⏝ࡋࡓ㟁ゎจ㞟ἲ࡟ࡼࡾᅵተᚤ⢏Ꮚࢆจ㞟ࡉࡏ㸪ඛ࡯࡝࡜ྠᵝࡢࢁ⣬࡛ࢁ㐣ࡋ 25µ㹫௨ୗࡢᅵተᚤ⢏Ꮚ࡜ᅵተ⢏Ꮚࢆྵࡲ࡞࠸ởᰁỈ࡟ศࡅࡓࠋࡇࢀࡽࡢ㐣⛬࡟ࡼࡾ㸪300µm㹼125µm㸪125µm㹼25µmࠊ25µm ௨ୗࡢจ㞟ỿẊᅵተ⢏Ꮚ࠾ࡼࡧจ㞟ỿẊฎ⌮ᚋࡢởᰁỈࡢ 4 ࡘ࡟ศ㢮ࡋ㸪ࡉࡽ࡟ྛ᧯సẁ㝵࡛ࡢヨᩱࡢᨺᑕ⬟ ᐃࢆ⾜ࡗࡓࠋᨺᑕ⬟ ᐃ࡟ࡣ୺࡟పᨺᑕ⬟⃰ᗘởᰁヨᩱ ᐃ⏝࡟〇సࡋࡓᑐྥᆺ NaI(Tl)ࢩࣥࢳ࣮ࣞࢩࣙࣥࢩࢫࢸ࣒ࢆ౑⏝ࡋࡓࠋ䛆 ᐃ⤖ᯝ䛇 ᐃ⤖ᯝࢆ⾲ 1 ࡟♧ࡍࠋᅵተヨᩱ㸦⢏ᚄ㸺300µm㸧ࡢ඲ᨺᑕ⬟ࡢ⣙ 80%ࡀ⢏ᚄ㸺125µm ࡢᅵተ⢏Ꮚ࡟ࡼࡿࡇ࡜ࡀศ࠿ࡗࡓࠋᮏసᡂヨᩱ୰ࡢ⢏ᚄ㸺25µm ࡢᚤ⢏Ꮚࡢ๭ྜࡣ
ࢃࡎ࠿࡛࠶ࡗࡓࡀ㸪㟁ゎจ㞟ἲ࡟ࡼࡗ࡚ࡇࡢᡂศࢆᅇ཰࡛ࡁࡿࡇ࡜㸪ࡲࡓ㸪ởᰁᅵተ࠿ࡽỈ࡬ᨺᑕᛶࢭࢩ࣒࢘ࡣ࡯࡜ࢇ࡝⁐ฟࡋ࡞࠸ࡇ࡜ࡀ☜ㄆ࡛ࡁࡓࠋ௒ᚋࡉࡽ࡟⢓ᅵ㉁ᡂศࡢከ࠸Ỉ⏣୰ࡢởᰁỈࡢศᯒࢆ⾜࠺ணᐃ࡛࠶ࡿࠋ
⾲ 1 ᐃ⤖ᯝ㸦134Cs㸧
ᅵተ⢏Ꮚࡢ

㔜㔞ẚ

ᨺᑕ⬟

⢏ᚄ[µm][%][Bq/sample]

300 ௨ୗ

100

502±9

300㹼12533

99±3

125 ௨ୗ

64

366±6

125㹼25

58

313±5

<1

1.98±0.12<11.55±0.1100.23±0.03

25 ௨ୗ (㟁ゎจ㞟๓)25 ௨ୗ (㟁ゎจ㞟ᚋ)ᅗ 1 ᐇ㦂ᡭ㡰

0 䠄ṧ␃Ỉ䠅A trial of radioactivity measurement on radioactively-contaminated water including clay soils
YANO, Y., ZUSHI, N., SATO, F., KATO, Y., IIDA, T..

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⚟ᓥ┴࡟࠾ࡅࡿ኱ẼỈ⵨Ẽ࡜㝆Ỉ୰ࢺࣜࢳ࣒࢘⃰ᗘ㸦㹼 ᖺ㸧P28஑⎔༠ ‫⏣ۑ‬⡲ஂஓࠊ⋢฼ಇဢࠊᕝᮧ⚽ஂ䛆䛿䛨䜑䛻䛇
⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾᚋࡢ⚟ᓥ┴ෆ࡟࠾ࡅࡿ⎔ቃ୰ࢺࣜࢳ࣒࢘⃰ᗘࡣ㸪ἙᕝỈ㸪†἟Ỉ㸪ᾏỈ➼࡟ࡘ࠸࡚ㄪᰝࡉࢀ㸪⌧ᅾࡣⓎ㟁ᡤ㏆ഐࡢᾏỈࢆ㝖ࡃṤ࡝ࡀ஦ᨾ๓࡜ྠ⛬ᗘ࡛࠶ࡿࡇ࡜ࡀሗ࿌ࡉࢀ࡚࠸ࡿ 1)ࠋ୍᪉㸪኱Ẽࡢࢹ࣮ࢱࡣᴟࡵ࡚㝈ࡽࢀ࡚࠸ࡿࠋ⌧ἣ࡟࠾ࡅࡿ኱Ẽ୰ࢺࣜࢳ࣒࢘⃰ᗘࢆᢕᥱࡍࡿࡓࡵ㸪⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ࠿ࡽ⣙ 30 km ࡢ⚟ᓥ┴⏣ᮧᕷ࡜⚟ᒸᕷ㸦ᑐ↷ᆅⅬ㸧࡟࠾࠸࡚㸪2013 ᖺ 10 ᭶࠿ࡽ኱ẼỈ⵨Ẽ࡜㞵Ỉࢆ 1 ࣨ᭶ẖ࡟᥇ྲྀࡋࢹ࣮ࢱࢆ
ᚓࡓࠋ௒ᅇࡣࡇࡢ⤖ᯝ࡟ࡘ࠸࡚ሗ࿌ࡍࡿࠋ
䛆ᐇ㦂䛇
2013 ᖺ 10 ᭶ࡼࡾ⚟ᓥ┴⏣ᮧᕷࡢ⯪ᘬ⏫㸪ᖖⴥ⏫㸦2014 ᖺ 4 ᭶௨㝆ࡣ⯪ᘬ⏫ࡢࡳ㸧㸪ཬࡧᑐ
㇟ᆅⅬ࡛࠶ࡿ⚟ᒸᕷ㸦஑⎔༠ᩜᆅෆ㸧࡟࠾࠸࡚㸪኱Ẽ୰Ỉ⵨Ẽ≧ࢺࣜࢳ࣒࢘(HTO)ࢆࣔࣞ࢟ࣗ
࣮ࣛࢩ࣮ࣈ㸦MS-3A㸧࡟ࡼࡾ㸯ࣨ᭶㛫ẖ㐃⥆ᤕ㞟ࡋࡓࠋࡲࡓ㸪᭶㛫㞵Ỉࡶ᥇ྲྀࡋࡓࠋ኱Ẽ୰
HTO ࡣ࣮ࣔࣞ࢟ࣗࣛࢩ࣮ࣈࢆ❅⣲Ẽὶ୰࡛ຍ⇕ࡋ㸪㞳⬺ࡋࡓỈ⵨Ẽࢆࢥ࣮ࣝࢻࢺࣛࢵࣉࡋ࡚
ᅇ཰㸪⢭〇ࡋࡓࠋ᭶㛫㞵Ỉࡣ㟁ゎ⃰⦰ࢆ⾜ࡗࡓࠋ๓ฎ⌮࡟ࡼࡾᚓࡓỈヨᩱࢆࢩࣥࢳ࣮ࣞࢱ࡜
ΰྜᚋ㸪పࣂࢵࢡࢢࣛ࢘ࣥࢻᾮయࢩࣥࢳ࣮ࣞࢩࣙࣥ࢝࢘ࣥࢱ㸦Hitachi Aloka LB-5 ࡲࡓࡣ LB-7㸧
࡟ࡼࡾࢺࣜࢳ࣒࢘⃰ᗘࢆ ᐃࡋࡓࠋ䛆⤖ᯝࠚ⏣ᮧᕷ㸪⚟ᒸᕷ࡟࠾ࡅࡿ 2013 ᖺ 10 ᭶࠿ࡽ 2014 ᖺ 4 ᭶ࡲ࡛ࡢ኱Ẽ୰ HTO ⃰ᗘࢆᅗ㸯࡟♧ࡍࠋ⌧᫬Ⅼ࡛ࢹ࣮ࢱᩘࡀᑡ࡞࠸ࡶࡢࡢ㸪୧ᆅⅬࡢ⃰ᗘ࡟኱ࡁ࡞ᕪࡣㄆࡵࡽࢀࡎ㸪⏣ᮧᕷ࡟࠾࠸࡚ࡶ஦ᨾ๓࡜ྠ➼ࡢࣞ࣋ࣝ࡟࠶ࡿࡇ࡜ࡀ☜ㄆࡉࢀࡓࠋ㝆Ỉヨᩱ㸪ཬࡧ 2014 ᖺ 5 ᭶௨㝆ࡢ኱Ẽヨᩱࡣ⌧ᅾ ᐃ୰࡛࠶ࡿࠋᏘ⠇ኚື➼ࡢഴྥࡣ௒ᚋࡢࢹ࣮ࢱ࡟ࡼࡿࠋⓎ⾲ᙜ᪥ࡣ᭱᪂ࡢࢹ
࣮ࢱࢆຍ࠼࡚ሗ࿌ࡍࡿࠋ
2.0⏣ᮧᕷ⯪ᘬ⏫

25

኱Ẽ୰HTO⃰ᗘ(Bq/L)኱Ẽ୰HTO⃰ᗘ(mBq/m3)

30⏣ᮧᕷᖖⴥ⏫
20

⚟ᒸᕷ

15
10
5
0

⏣ᮧᕷ⯪ᘬ⏫
⏣ᮧᕷᖖⴥ⏫
⚟ᒸᕷ

1.5

1.0

0.5

0.0

Dec

Nov

Oct

Sep

Aug

Jul

Jun

May

Apr

Mar

Feb

Jan

Dec

Nov

2013

2014

ᅗ㸯

Oct

Sep

Dec

Nov

Oct

Sep

Aug

Jul

Jun

May

Apr

Mar

Feb

Jan

Dec

Nov

Oct

Sep

2013

2014

⏣ᮧᕷཬࡧ⚟ᒸᕷ࡟࠾ࡅࡿ኱Ẽ୰ HTO ⃰ᗘ㸦༢఩㸸ᕥᅗ mBq/m3ࠊྑᅗ Bq/L㸧

1) Ἑᕝ➼ࡢ⎔ቃᨺᑕ⥺ࣔࢽࢱࣜࣥࢢㄪᰝ⤖ᯝ㸦ࢺࣜࢳ࣒࢘ࠊ2013 ᖺᗘᚋᮇศ㸧࡟ࡘ࠸࡚㸦⚟ᓥ┴ࠊhttp://www.pref.fukushima.lg.jp/sec_file/monitoring/k-2/tritium131202-131226.pdf㸧

Tritium concentrations in Atmospheric environment and rain at Fukushima Prefecture(2013㹼2014)‫ۑ‬TAGOMORI,H.,TAMARI, T., KAWAMURA, H.

- 144 -

P29!!"!"#$%&'()*+,-./012345!
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×°²wc³ØÙÚ ÀµÛ·z{!!"#$ z¹º$¼½$¾¿¼½$Å¥$¾¿ººsA"D10 ÜÝEsBÞß$F$
àA$á$âA$ãä$åA$æA$çA$èç$éê$ë$Eì$)ì$íì$î$ïð$ñ ò$óôò$Gôò$õöò$:H$@Ç$÷$øù$ëúw$ãûµÈüýÃÃ
þf$Iÿ$!"$JµÈyz{Kÿ#~¯$%&y'G(yz$100 mL sú"fB$)¥*+¹,Ø-Ö./"f­tuÒÓÔµÕyz{tuÒ$*X0q1yz 2011 | 3 } 11 df23LIyz{%!"#$ op~M4}5678z· I-131 s9ØÙÚstuv:ÝN ~¡zq$
Cs-134DØÙÚ 2.1 |H$Cs-137DØÙÚ 30 |H$Ag-110mDØÙÚ 250 dH$Te-129mDØÙÚ 34 dHqN8~¡z{Cs-134$Cs-137 ;ÄsKÿ~./$A"s<¨ß=<fr~¡z{Cs-134 Ã Cs-137 ©ÑÖstuÒ>$!" 1 ¨#¡z{Te-129m ° Ag-110m Ð¹ºsçAÃâA~./z{Te-129m  2011 |sKÿs$¨#¡zq$
Ag-110m  2013 |sKÿ¨þ./z{Ag-110m G,s@Ç<%­&!"°Js'(Kÿ~ 2011 |f./zq$Cs-137 Ã>¶)3*¡z{Te-129m '(Kÿ~./ ~¡z{+z$¹º5±s!,ED¼½$¾¿¼½$Å¥$½-.$/0¤*H~
Ag-110m ./ ~¡z{Cs ÓÔÃ Te-129m ° Ag-110m 6f1/qN2$3
sO$7PsQËq45z{¹º$¼½s6A"Ã@<stuÒÓÔí«1/
f#$76«3Ãþ1/q#¡z{Cs ÓÔs6A"Ã@Ç6f8Ë1/q$z{9:µþ8;Öþ#$9:sA"~<Ö­þ'ËÓÔs Cs q./zq$Ag-110m$
Te-129m ./ ~¡z{<$=/>f#¹º¨$Cs$Ag-110m$Te-129m q©Éf'ËÓÔ¨./z{%&'()#$ T. Fukuda et al., PLOS ONE, 8, (2013), e54312; E. Isogai et al., Rad. Emer. Med., 2,(2013), 68-71; H. Yamashiro et al., Sci. Rep., 3 (2013) 2850; H. Yamashiro et al., Recent Advance in
Cryopreservation, edit. H. Yamashiro, InTech, Croatia, Ch. 5 (2014) 73.
Distribution of Artificial Radionuclides in Abandoned animals in the Ex-evacuation Zone of the
Fukushima Daiichi Nuclear Power Plant Accident
KINO, Y., IRISAWA, A., KOARAI, K., SUZUKI, M., URUSHIHARA, Y., ABE, Y., YAMASHIRO, H.,
FUKUDA, T., ISOGAI, E., KOBAYASHI, J., OKA, T., SEKINE, T., SHINODA, H., FUKUMOTO, M.

- 145 -

P30

⚟ᓥ┴ᮾ㒊ᆅᇦࡢἙᕝ࡟࠾ࡅࡿ 137Cs ⃰ᗘ࡜⵳✚㔞࡜ࡢ㛵㐃⎔ቃ⛉Ꮫᢏ⾡◊✲ᡤ ࠊ⌧ᡤᒓ㸸᰾⼥ྜ⛉Ꮫ◊✲ᡤ  ‫ྜⴠۑ‬ఙஓ ࠊ᳜⏣┿ྖࠊ㛗㇂ᕝⱥᑦ ࠊᰠෆ⚽ᶞ ࠊ㉥⏣ᑦྐ ࠊ኱ሯⰋோ ࠊஂᯇಇ୍ 䛆䛿䛨䜑䛻䛇⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾ࡟ࡼࡾἙᕝὶᇦ࡟ỿ╔ࡋࡓ 137Cs ࡣἙᕝࢆ㏻ࡌ࡚ὶฟࡋ
࡚࠸ࡿࠋ⢏Ꮚ≧≀㉁࡟ᙉࡃ྾╔ࡋ࡚࠸ࡿ 137Cs㸦ᠱ⃮ែ 137Cs㸧࡟ẚ࡭࡚ࠊ⁐Ꮡែ 137Cs ࡣ⛣ືᛶࡀ㧗ࡃࠊỈ㐨ỈࡸỈ⏣࡬ࡢᙳ㡪ࢆཬࡰࡍྍ⬟ᛶࡀ♧၀ࡉࢀ࡚࠸ࡿࠋฟỈ᫬࡟ᛴቑࡍࡿᠱ⃮ែ 137Cs ࡟ẚ㍑ࡋ࡚⁐Ꮡែ 137Cs ࡣᖹỈ᫬࡟ࡶᐃᖖⓗ࡟㍺㏦ࡉࢀࡿࡇ࡜࠿ࡽࠊࡑࡢ⃰ᗘࡢᨭ㓄せᅉࢆ᫂ࡽ࠿࡟ࡍࡿࡇ࡜ࡣ௒ᚋࡢ⛣⾜ண ࡢほⅬ࠿ࡽ㔜せ࡛࠶ࡿࠋࡑࡇ࡛ࠊ⚟ᓥ┴ᮾ㒊ᆅᇦࡢἙᕝ࡟࠾ࡅࡿ⚟ᓥ➨୍ཎⓎ஦ᨾ࡟ࡼࡿ 137Cs ࡢ⃰ᗘศᕸ࡜ࠊࡑࢀࡽ࡟ᙳ㡪ࢆ୚࠼ࡿὶᇦ⎔ቃ᮲௳ࢆ᳨ウࡍࡿࡓࡵࠊ7 ἙᕝỈ⣔㸦16 ᆅⅬ㸧࡟࠾࠸࡚ࠊᖹỈ᫬ࡢᠱ⃮ែ࠾ࡼࡧ⁐Ꮡែ 137Cs ࡢ⃰ᗘศᕸࡢほ ࢆ⾜ࡗࡓࠋ䛆ᡭἲ䛇⚟ᓥ┴ᮾ㒊ᆅᇦࡢ 7 ἙᕝỈ⣔㸦Ᏹከᕝࠊ┿㔝ᕝࠊ᪂⏣ᕝࠊኴ⏣ᕝࠊᑠ㧗ᕝࠊㄳᡞᕝ࠾
ࡼࡧ㜿Ṋ㝰ᕝ㸧ෆࡢィ 16 ᆅⅬ࡟࠾࠸࡚ࠊ2012 ᖺ࠾ࡼࡧ 2013 ᖺࡢ 6 ᭶㹼9 ᭶࡟ᖹỈ᫬ࡢἙᕝỈࢆ᥇ྲྀࡋࡓࠋ᥇ỈࡋࡓἙᕝỈࡣཎỈࢆ඲ 137Cs㸦ᠱ⃮ែ㸩⁐Ꮡែ㸧ศᯒヨᩱ࡜ࡋࠊ0.45 !mࡢ࣓ࣥࣈࣞࣥࣇ࢕ࣝࢱ࣮࡛ࢁ㐣ࡋࡓࡶࡢࢆ⁐Ꮡែศᯒヨᩱ࡜ࡋࡓࠋཎỈ࠾ࡼࡧࢁᾮࡣࠊ㝜࢖࢜ࣥ஺᥮ᶞ⬡࡜㝧࢖࢜ࣥ஺᥮ᶞ⬡ࢆΰྜࡋ࡚඘ሸࡋࡓ࣒࢝ࣛࢆ㏻ࡋࠊᠱ⃮ែ࠾ࡼࡧ⁐Ꮡែ
137
Cs ࢆ྾╔ࡉࡏࡓࠋᶞ⬡ࡣ஝⇱ᚋࠊU-8 ᐜჾ࡟ᑒධࡋࠊGe ༙ᑟయ᳨ฟჾ࡟ࡼࡗ࡚ 137Cs ⃰ᗘࢆ ᐃࡋࡓࠋᠱ⃮ែ 137Cs ⃰ᗘࡣ඲ 137Cs ࠿ࡽ⁐Ꮡែ 137Cs ࢆᕪࡋᘬࡃࡇ࡜࡛ồࡵࡓࠋ㞟Ỉᇦࡢ
137
Cs ⵳✚㔞ࡣࠊᩥ㒊⛉Ꮫ┬࡟ࡼࡿ⯟✵ᶵࣔࢽࢱࣜࣥࢢ㸦➨ 5ࠊ6 ḟ㸧࡟ࡼࡿỿ╔㔞ࡢ ᐃ⤖ᯝ࡟ᇶ࡙࠸࡚᥎ᐃࢆ⾜ࡗࡓࠋ䛆⤖ᯝ䛸⪃ᐹ䛇ἙᕝỈࡢᠱ⃮ែ࠾ࡼࡧ⁐Ꮡែ 137Cs ⃰ᗘࡣࠊࡑࢀࡒࢀ 6.010-3㹼6.010-1 Bq L-1ࠊ࠾ࡼࡧ 9.910-3㹼5.910-1 Bq L-1 ࡢ್ࢆ♧ࡋࡓࠋἙᕝỈࡢ⁐Ꮡែ 137Cs ⃰ᗘࡣྛ᥇ỈᆅⅬ࡟ᑐࡍࡿ㞟Ỉᇦෆࡢ 137Cs ⵳✚㔞ࡢᖹᆒ್࡜㧗࠸┦㛵ࢆ♧ࡋࡓ㸦Fig. 1㸧ࠋ୍᪉ࠊἙᕝỈࡢᠱ⃮ែ 137Cs⃰ᗘ࡜⵳✚㔞ࡢ┦㛵ࡣẚ㍑ⓗప࠿ࡗࡓࠋࡇࡢࡇ࡜ࡣࠊᖹỈ᫬࡟࠾ࡅࡿ⁐Ꮡែ 137Cs ࡢὶฟࡣࠊ
࡯ࡰ㞟Ỉᇦෆ⵳✚㔞࡟ᙉࡃᨭ㓄ࡉࢀࡿࡇ࡜ࢆ♧၀ࡋ࡚࠸ࡿࠋ
ࡲࡓࠊ᥇ỈᆅⅬ࡛ࡢ⁐Ꮡែ 137Cs ⃰ᗘ࡜౪⤥※࠿ࡽࡢ㊥㞳࡜ࡢ㛵㐃ࢆ᳨ウࡋࡓࠋ㞟ỈᇦෆࡢྛⅬ࠿ࡽⴠỈ᪉ྥ࡟ἢࡗ࡚᥇ỈᆅⅬࡲ࡛ࡢὶ㊰㛗ࢆィࡋࠊ᥇ỈᆅⅬ࠿ࡽ࠶ࡿὶ㊰㛗ࡢ⠊ᅖෆࡢᖹᆒ⵳✚㔞ࢆぢ✚ࡶࡗࡓࠋᵝࠎ࡞ὶ㊰㛗ෆ࡛ࡢ 137Cs
ᖹᆒ⵳✚㔞࡜⁐Ꮡែ 137Cs ⃰ᗘ࡜ࡢ㛵㐃ࢆ᳨ウࡋࡓ⤖ᯝࠊ⁐Ꮡែ 137Cs ⃰ᗘࡣ᥇ỈᆅⅬ㏆ഐࡢࡳ࡛ࡣ࡞ࡃࠊ㞟Ỉᇦ඲య࠿ࡽ࡯ࡰᆒ୍࡟ᐤ୚ࢆཷࡅࡿ
ྍ⬟ᛶࡀ♧၀ࡉࢀࡓࠋᮏグ㍕஦㡯ࡣࠊ㟷᳃┴࠿ࡽࡢཷク஦ᴗ࡟ࡼࡾᚓࡽࢀࡓᡂᯝࡢ୍㒊࡛࠶ࡿࠋ

Fig. 1 Relationship between dissolved 137Cs concentration
and average inventory in the river catchments.

Relationship between 137Cs concentration in river water and inventory in catchment areas in eastern
Fukushima Prefecture, JapanOCHIAI, S., UEDA, S., HASEGAWA, H., KAKIUCHI, H., AKATA, N., OTSUKA, Y., HISAMATSU, S.

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P31

⚟ᓥཎⓎ஦ᨾ⏤᮶ࡢపࣞ࣋ࣝ 134Cs ࢆࢺ࣮ࣞࢧ࣮࡜ࡋࡓ㜿㈡㔝ᕝἙᕝ⢏Ꮚࡢᣲື㸦㔠ἑ኱ LLRL㸧⡿ᒸಟ୍㑻ࠊ‫ୖۑ‬ᮧᐂ㍤ࠊ஭ୖ╬ኵࠊⴠྜఙஓࠊ㛗ᑿㄔஓࠊᒣᮏ
ᨻ൤ࠊ὾ᓥ㟹඾࠙◊✲⫼ᬒ࣭┠ⓗࠚ
2011 ᖺ 3 ᭶ 11 ᪥ࡢ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾ࡟ࡼࡾࠊ࿘㎶⎔ቃ୰࡟ከ㔞ࡢᨺᑕᛶ᰾✀ࡀᨺฟࡉࢀࡓࠋኴᖹὒഃ࡟࠾࠸࡚ࡣࡇࢀࡽࡢ᰾✀ࡢ⛣⾜ᣲືࢆ᥈ࡿࡓࡵ࡟ࠊᅵተࠊᾏỈࠊ኱Ẽ࠾ࡼࡧᾏᗏሁ✚≀࡟ࡘ࠸࡚ࡶㄪᰝࡀ⾜ࢃࢀ࡚ࡁࡓࠋ୍᪉࡛᪥ᮏᾏഃࡢㄪᰝ࡟࠾࠸࡚ࠊబΏᾏ┅ࡢᾏᗏሁ✚≀୰࡟ 134Cs ࡀ᳨ฟࡉࢀࡓ (Inoue et al., 2013)ࠋ୍⯡࡟ࠊཎⓎ஦ᨾ⏤᮶ Cs ࡢᣑᩓ⤒㊰ࡣࠊձཎⓎ࠿ࡽࡢởᰁỈ┤᥋ὶධ ղ኱Ẽ⤒⏤ࡢࣇ࢛࣮ࣝ࢔࢘ࢺ ճἙᕝ⤒⏤࡛ࡢ㝣ᇦᅵተ࠿ࡽࡢὶධࠊࡢ 3 ࡘ࡟኱ูࡉࢀࡿࠋ᪥ᮏᾏഃ࡛ࡣࠊཎⓎ࠿ࡽࡢởᰁỈࡢ┤᥋ὶධࡣ࡞ࡃࠊ኱
Ẽ࠿ࡽࡢࣇ࢛࣮ࣝ࢔࢘ࢺ࡟ࡼࡿᙳ㡪ࡶᴟࡵ࡚ᑠࡉ࠸ࠋࡘࡲࡾࠊబΏᾏ┅ࡢ 134Cs ࡢ኱㒊ศࡣ㝣ᆅ࡟ỿ╔ࡋࡓࡶࡢࡀἙᕝ࡟ࡼࡿᾐ㣗࣭㐠ᦙస⏝࡟ࡼࡗ࡚ᾏࡲ࡛㐠ࡤࢀࡓࡶࡢ࡛࠶ࡿ࡜᥎

ࡉࢀࡿࠋ㜿㈡㔝ᕝࡣࠊࡑࡢୖὶࢆ⚟ᓥ┴࡟ࡶࡕࠊ᪂₲┴ࢆ⤒࡚᪥ᮏᾏ࡟ࡑࡑࡂ㎸ࡴࠋᮏ◊✲࡛ࡣࠊ㜿㈡㔝ᕝὶᇦ࠿ࡽἙཱྀᇦ࡟࠾ࡅࡿࠊἙᕝ⢏Ꮚࠊᾏᗏሁ✚≀ࡢ 134Cs ࡢศᕸࢆㄪ࡭ࡿࡇ࡜࡛ࠊ
㜿㈡㔝ᕝἙᕝ⢏ᏊࡀἙᕝ࠿ࡽᾏᗏ࡟ሁ✚ࡍࡿࡲ࡛ࡢࣉࣟࢭࢫࢆ㆟ㄽࡍࡿࠋ࠙ヨᩱ᥇ྲྀ࣭ฎ⌮ࠚ
㜿㈡㔝ᕝ࠾ࡼࡧಙ⃰ᕝ࡟࠾࠸࡚ࠊ2013 ᖺ 6 ᭶࡜ 11 ᭶ࠊ2014 ᖺ 1 ᭶࡟ἙᕝỈ 20-60L ࢆィ 16
ヨᩱ᥇ྲྀࡋࡓࠋࡉࡽ࡟ࠊ2010 ᖺ㹼2013 ᖺࡢ㛫࡟᪂₲ἢᓊ࠿ࡽἈྜ࡟࠿ࡅ࡚ࠊᾏᗏሁ✚≀ྜィ
48 ヨᩱࢆ᥇ྲྀࡋࡓࠋἙᕝỈࡣ◊✲ᐊ࡛ࠊ5A ℐ⣬࡜ 0.45 µm ࣓ࣥࣈࣞࣥࣇ࢕ࣝࢱ࣮࡛ℐ㐣ࡋࠊ⢏Ꮚែ࡜⁐Ꮡែ࡟ศ㞳ࡋࡓࠋᑿᑠᒇᆅୗ ᐃᐊࡲࡓࡣᙜ᪋タ (ᆅୖࣞ࣋ࣝ) ࡟タ⨨ࡢ Ge ༙ᑟయ᳨ฟჾࢆ౑⏝ࡋࡓపࣂࢵࢡࢢࣛ࢘ࣥࢻȚ⥺ ᐃ࡟ࡼࡾ 134Cs ⃰ᗘࢆᐃࡋࡓࠋ࠙⤖ᯝ࣭⪃ᐹࠚ
ಙ⃰ᕝἙᕝ⢏Ꮚࡢ 134Cs ⃰ᗘࡣ 20-30 Bq/kg-dry ࡟ᑐࡋࠊ㜿㈡㔝ᕝ࡛ࡣ 100-700 Bq/kg-dry ࡛࠶ࡾࠊἙᕝỈ⢏Ꮚ୰ࡢ 134Cs ⃰ᗘࡀⴭࡋࡃ㧗࠸ࡇ࡜ࡀศ࠿ࡗࡓࠋࡲࡓࠊ㜿㈡㔝ᕝἙཱྀ௜㏆ࡢᾏᗏሁ✚≀ࡢ 134Cs ⃰ᗘࡣ 2-30 Bq/kg-dry ࡛ࠊἙཱྀ࡟㏆࠸࡯࡝㧗࠸್ࢆ♧ࡋࡓࠋ㜿㈡㔝ᕝࡀ⚟ᓥཎⓎ㉳※ࡢ 134Cs ࢆ᪥ᮏᾏ࡟㐠ᦙࡋࡓ࡜⪃࠼ࡽࢀࡿࠋᮏᖺ఍࡛ࡣࠊ134Cs ࠿ࡽࡳࡓἙᕝỈ⢏Ꮚࡢ⛣⾜ᣲືࢆ㆟ㄽࡍࡿࠋᩥ⊩ Inoue et al. (2013) Appl. Radiat. Isot. 81, 340-343.

Migration pattern of riverine particles in the Agano River; implications from the
FDNPP-derived low-level 134Cs.
YONEOKA, S., UEMURA, H., INOUE, M., OCHIAI, S., NAGAO, S., YAMAMOTO, M.,
HAMAJIMA, Y.

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P32ࣔࣝࢱࣝ࡬ࡢ࢔ࢡࢳࣀ࢖ࢻ࠾ࡼࡧ᰾ศ⿣⏕ᡂ᰾✀ࡢᾐ㏱ởᰁ࡜ศ㓄ᖹ⾮ࣔࢹࣝ࡟ࡼࡿ῝ᗘศᕸண ΎỈᘓタ ࠊ⟃Ἴ኱ᩘ⌮ ࠊ㔠ἑ኱⌮ᕤ  ‫ۑ‬ᮌୗဴ୍ ࠊ኱▼᫭Ⴙ ࠊ㫽ᒃ࿴ᩗ ࠊᮎᮌၨ௓ ࠊᶓᒣ᫂ᙪ ⚟ᓥཎⓎ஦ᨾ࡟ࡼࡾᨺᑕᛶྠ఩ඖ⣲ࡀ᱁⣡ᐜჾ࠿ࡽእ࡟ᨺฟࡉࢀࠊࡇࢀࡽࡢ᰾✀ࡀཎᏊ⅔ᘓᒇෆእࡢቨ㠃ࡸᅵተ࡞࡝௜╔ࡋࠊసᴗ⪅࡬ࡢ⿕ࡤࡃ࡜ᨺᑕᛶᗫᲠ≀ࢆ⏕ࡳฟࡍせᅉ࡟࡞ࡗ࡚࠸ࡿࠋ
ࡑࡢ୍᪉࡛ࠊ⅔ᚰࢆ෭༷ࡍࡿࡓࡵ࡟኱㔞ࡢỈࢆ⅔ෆ࡟ὀỈࡋ࡚࠾ࡾࠊỈ⁐ᛶࡢ᰾✀ࡣỈ࡟⁐ࡅࠊởᰁỈ࡜࡞ࡗ࡚ཎⓎᘓᒇࡢᆅୗ࡞࡝࡟⁫␃ࡋ࡚࠸ࡿࠋཎⓎᘓᒇቨ㠃ࡸᘓᒇෆ㒊ࡢࢥࣥࢡ࣮ࣜࢺ࡛
ࡣ㝆㞵ࡸởᰁỈ࡜᥋ゐࡋࠊᨺᑕ⬟ởᰁࡣ⾲㠃࠿ࡽෆ㒊࡟ᾐ㏱ࡋ࡚࠸ࡿࠋ୍⯡ⓗ࡟㝖ᰁࡣࠊởᰁࡋࡓཌࡳࢆ๐ࡾྲྀࢀࡤࡼ࠸ࡀࠊᾐ㏱ࡢ⛬ᗘ࡟ᛂࡌ࡚ཌࡳࢆホ౯ࡋ࡞ࡅࢀࡤ࡞ࡽ࡞࠸ࠋ≉࡟ཎⓎᘓᒇෆ㒊ࡢởᰁỈ࡟ࡣᨺᑕᛶࢭࢩ࣒࢘ࡢ௚ࠊᨺᑕᛶࢫࢺࣟࣥࢳ࣒࢘ࡸ⇞ᩱࡢ࢘ࣛࣥࡸࣉࣝࢺࢽ࣒࢘ࡶ
Ꮡᅾࡍࡿࠋࢥࣥࢡ࣮ࣜࢺ࡬ࡢᾐ㏱࡟ࡣඖ⣲ࡸ໬Ꮫ✀ࡈ࡜ࡢᕪࡀᠱᛕࡉࢀࠊ᭱ࡶ῝ࡃࡲ࡛ᾐ㏱ࡋࡓ᰾✀࡟ᛂࡌࡓ㝖ᰁࡀᚲせ୙ྍḞ࡜࡞ࡿࠋ୍᪉࡛ࠊ㐣ᗘࡢ῝ࡉࡲ࡛㝖ཤࡍࡿࡇ࡜ࡣ኱㔞ࡢᨺᑕᛶᗫ
Რ≀ࡢⓎ⏕ࡉࡏࡿࡇ࡜࡟࡞ࡿࠋᮏ◊✲࡛ࡣࠊᘓᒇ㝖ᰁ࡟ࡼࡿᨺᑕᛶᗫᲠ≀ࡢၥ㢟ࢆゎỴࡍࡿࡓࡵࡢᇶ♏ࢹ࣮ࢱ࡜ࡋ࡚ࠊ⢊ᮎࣔࣝࢱࣝࢆ⏝࠸ࡓ῝ᗘศᕸ࡜ศ㓄ಀᩘ Kd ࡢ㛵ಀࢆ᫂ࡽ࠿࡟ࡋࠊከ㔞ࡢỈࡀᾐ㏱ࡋ㣬࿴ࡋࡓ⣔࡟࠾ࡅࡿ῝ᗘศᕸࢆࣔࢹࣝ࡜ᐇ㦂ࢹ࣮ࢱࡼࡾ᫂ࡽ࠿࡟ࡋࡓࠋ
ᮏ◊✲࡛ࡣ 1:3 ࣔࣝࢱࣝࢆࢫࢱࣥࣉ࣑࡛ࣝ⢊ᮎ࡟ࡋࡓࡶࡢࢆ⏝࠸ࡓࠋ⢊ᮎ≧ࡢࣔࣝࢱࣝࢆワࡵࡓ࣒࢝ࣛ࡟ pH ࡀ࡯ࡰ୰ᛶࡢ 85Srࠊ137Csࠊ238U ⁐ᾮ᪤▱㔞ࢆ㏻ࡋࠊ῝ᗘศᕸࡢ85⢊ᮎ≧ࡢࣔࣝࢱࣝࢆ Sr,

137

Cs,

238

U,

242

Pu,

ᐃࢆ⾜ࡗࡓࠋࡲࡓ

241

Am ࡢᶆ‽⁐ᾮ୰࡛ 30 ศ㛫᧠ᢾࡋࠊࡇࢀࡽࡢ᰾✀࡜

ࡢ Kd ࢆ ᐃࡋࡓࠋᅗ 1 ࡟♧ࡍࡼ࠺࡟ࠊࣔࣝࢱࣝ࡜྾╔ゎ㞳ࢆ⧞ࡾ㏉ࡋ࡞ࡀࡽᾐ㏱ࡍࡿࣔࢹࣝࢆ⏝࠸࡚῝ᗘศᕸࢆࣔࢹ
ࣝ໬ࡀ࡛ࡁࡿࠋ⌮ㄽẁᩘ n ẁ┠࡟࠾ࡅࡿᅛ┦୰ࡢ
RI 㔞࡜ᅛ┦ࡢ㔞ࢆࡑࢀࡒࢀ Cn ࡜ Vcࠊᾮ┦୰ࡢ RI

ᅛ┦୰䛾㔞Cnᅛ┦䛾㔞 Vcᾮ┦୰䛾㔞Snᾮ┦䛾㔞 Vs㔞࡜ᾮ┦ࡢ㔞ࢆ Sn ࡜ Vs ࡜࠾ࡃ࡜ࠊKd=(Cn/Vc)/(Sn/Vs)
࡜ Cn+1+Sn+1=Sn ࡢ㛵ಀᘧࡀᚓࡽࢀࡿࠋࡇࢀࡽࡼࡾ nẁ┠࡟࠾ࡅࡿ RI ⃰ᗘࡣ exp{!n"ln(4Kd+1)}ࡢഴࡁ

10

㛵ಀࡼࡾࠊࣔࣝࢱࣝ࡟࠾ࡅࡿ⃰ᗘࡀ⾲㠃ࡢ 1/1000
࡟࡞ࡿ῝ࡉࡣ Sr ࡛ࡣ 90 mmࠊCs ࡣ 5 mmࠊ
U ࡣ 4 mmࠊPu ࡣ 3 mmࠊAm ࡣ 2 mm ࡜ぢ✚ࡶࡽࢀࠊ⚟ᓥཎⓎᘓᒇෆ࡛ࡣ≉࡟ 90Sr ࡢ῝࠸ᾐ㏱ࢆᠱᛕࡋ࡞ࡅࢀࡤ
࡞ࡽ࡞࠸ࡇ࡜ࡀ᫂ࡽ࠿࡟࡞ࡗࡓࠋ

῝ᗘศᕸഴࡁ (cm2/g)ࡼࡾ⌮ㄽẁᩘ 1 ẁศࡢཌࡳࡣ 1 g/cm2 ⛬ᗘ࡜ぢ✚ࡶ್ࡣⰋࡃ୍⮴ࡋࡓࠋKd ࡜῝ᗘศᕸࡢഴࡁࡢ

S1

Kd
ศ㓄

1

Kd

S2
2

Kd
Sn

䞉䞉䞉

Cn+1

Kd
ศ㓄

n

Sn+1
n+1

ᅗ 1 ᾐ㏱࡟࠾ࡅࡿᅛᾮᖹ⾮ࡢᶍᘧᅗ
12

࡜ᐇ

Kd

Cn

⌮ㄽẁᩘ1ẁศ#1g/cm2࡛ᣦᩘ㛵ᩘⓗ࡟ῶᑡࡋࠊࡲࡓ῝ᗘศᕸࡢഴࡁ㸦ᅗ 1㸧ࡽࢀࡓࠋᅗ 2 ࡟♧ࡍࡼ࠺࡟ࠊᮏࣔࢹࣝ࡟ࡼࡿ᥎ᐃ್

C2

C1

8
6
4

ᐇ㦂್
ࣔࢹࣝ

2
0 -1
10

100

101

Kd

102

103

104

ᅗ 2 Kd ࡜῝ᗘศᕸഴࡁࡢ㛵ಀ

Penetration of actinoids and fission products in mortar and estimation of distribution using a partition
equilibrium model
KINOSHITA, N., OISHI, K., TORII, K., SUEKI, K., YOKOYAMA, A.

- 148 -

㑅ᢥⓗ U(VI)ỿẊ๣ DMPU ࠾ࡼࡧ DMI ࡢ⪏⇕ᛶ

P33㏆኱㝔⥲⌮ᕤ ࠊ㏆኱⌮ᕤ ࠊᮾᕤ኱ཎᏊ⅔  ‫ۑ‬㔝ୖ㞞ఙ ࠊ⏣୰ᗣோ ࠊ୕Ꮿᜤᖹ ࠊす⏣ဴ኱ ࠊ㕥ᮌᬛஓ  ࠊụ⏣Ὀஂ 㸦 ⌧-$($㸧ṧᏑ⋡㸦㸣㸧

࠙⥴ゝࠚ ⎔≧ᒀ⣲໬ྜ≀ࡣࠊ◪㓟㓟ᛶỈ⁐ᾮ⣔࡟࠾ࡅࡿ U(VI)࡬ࡢ㑅ᢥⓗỿẊ๣࡜ࡋ࡚ࡢྍ
⬟ᛶࢆ᭷ࡍࡿࠋࡇࢀࡲ࡛ࠊ2 ✀ࡢೃ⿵ỿẊ๣㸦1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone(DMPU㸸6 ဨ⎔) ࠾ࡼࡧ 1,3-dimethyl-2-imidazolidinone (DMI㸸5 ဨ⎔)㸧ࡢ⪏Ț⥺ᛶ࠾ࡼࡧ⪏⇕ᛶ࡟ࡘ࠸᳨࡚ウࡋࠊࡑࡢᐃᛶⓗ࡞ศゎᣲືࢆ୍㒊᫂ࡽ࠿࡟ࡋ࡚ࡁࡓ[1,2]ࠋᮏ✏࡛ࡣࠊ୧⪅ࡢࡼࡾᐃ㔞ⓗ࡞⪏⇕ᛶࡢホ౯ࢆヨࡳࡓࠋ࠙ᐇ㦂ࠚ 1 mol/dm3(=M) DMPU ࡲࡓࡣ DMI ࢆྵࡴ◪㓟㸦᭱኱ 4 M㸧100 cm3 ࢆࠊ᭱㧗 70 oC, ᭱኱ 360 ศࡢ᮲௳࡛ຍ⇕ࡋࡓࠋຍ⇕ヨᩱࡣ 1H NMR㸦300 MHz, ⁐፹㸸D2O㸧࡟ࡼࡾศᯒࡋࠊྛ
ヨᩱ࡟࠾ࡅࡿࢫ࣌ࢡࢺࣝࡢྛࣆ࣮ࢡࡢ㠃✚ẚ࠿ࡽ୧ỿẊ๣ࡢṧᏑ⋡ࢆ⟬ฟࡋࡓࠋࡲࡓ DMI ࡢᐃ㔞ࡣ LC㸦࣒࢝ࣛ㸸Shim-pack FC-ODS (150 mmH4.6 mmȭ),ᗘ㸸40 oC, ⛣ື┦㸸Ỉ - ࢔ࢭࢺࢽࢺࣜࣝ(AN)(H2O/AN= 3(v/v), ⛣ື┦ὶ㏿㸸1 cm3/min,ࣆ࣮ࢡ᳨ฟ㸸⣸እ⥺྾཰(254 nm),ෆ㒊ᶆ‽≀㉁㸸1-n-propyl-2- pyrrolidone ࡟ࡼࡗ࡚ࡶ⾜ࡗࡓࠋ࠙⤖ᯝ࠾ࡼࡧ⪃ᐹࠚ4 M ◪㓟୰, 50 oC ࡛ຍ⇕ࡋࡓ DMPU
(B)ࡢṧᏑ⋡ࡢ⤒᫬ኚ໬ࢆᅗ 1 ࡟♧ࡍࠋṧᏑ⋡࡟ࡣ◪㓟⃰ᗘ౫Ꮡᛶࡀ࡯࡜ࢇ࡝࡞ࡃࠊ360 ศᚋ࡛⣙ 50 %࡛࠶ࡗࡓࠋ
(C)
A
100
o
B
୍᪉ࠊ70 C ຍ⇕᫬ࡢṧᏑ⋡ࡣࠊ⣙ 30 ~ 60 ศᚋ࡟࠾࠸
(A)C80
࡚ 4 M ◪㓟ヨᩱࡢ್ࡀ 1, 2 M ◪㓟ࡢሙྜࡼࡾప࠿ࡗࡓ
ࡀࠊ360 ศᚋ࡟ࡣ඲࡚ࡢ◪㓟⃰ᗘ࡛⣙ 40 %࡜࡞ࡗࡓࠋ
60ࡇࢀࡼࡾ DMPU ࡢศゎࡣ◪㓟⃰ᗘቑ኱ࡼࡾࡶ ᗘୖ᪼ࡢᙳ㡪ࢆཷࡅࡸࡍ࠸ࡇ࡜ࡀ᫂ࡽ࠿࡜࡞ࡗࡓࠋDMI ࡟ࡘ࠸࡚40
ࡣࠊ1 M ◪㓟, 50 oC ࡛ࡢຍ⇕࡛ࡣṤ࡝ศゎࡋ࡚࠸࡞࠸ࡇ
0
60
120 180 240 300 360
࡜ࡀࢃ࠿ࡗࡓࠋࡋ࠿ࡋࠊࡼࡾ㧗⃰ᗘࡢ◪㓟୰, 㧗 ࡛ࡢ᫬㛫 ศຍ⇕࡛ࡣ᫂ࡽ࠿࡟ศゎࡀ㢧ⴭ࡟࡞ࡾࠊࡑࡢᐃ㔞ࡀ 1H
NMR ࠾ࡼࡧ LC ࡢ୧ศᯒἲ࡟ࡼࡗ࡚ࡶඹ࡟ᅔ㞴࡟࡞ࡗࡓࠋ ᅗ 1 4 M ◪㓟୰, 50oC ࡛ຍ⇕ࡋࡓ௒ᚋࡇࡢᨵၿࡀᚲせ࡛࠶ࡿࠋDMPU ࡢṧᏑ⋡ࡢ⤒᫬ኚ໬࡞࠾ࠊ୧ỿẊ๣ࡢศゎ⏕ᡂ≀ࡀ⤖ᬗ࡜ࡋ࡚ᯒฟࡋࡓࠋ୧
ỿẊ๣ࡣ⎔ࢆᵓᡂࡍࡿⅣ⣲ᩘࡀ୍ࡘ␗࡞ࡿࡢࡳ࡛࠶ࡿࡀࠊDMPU ࠿ࡽᯒฟࡋࡓ⤖ᬗࡀ࣐ࣟࣥ㓟࡜ྠᐃࡉࢀࡓ[2]ࡢ࡟ᑐࡋࠊDMI ࡢሙྜࡣࡇࢀ࡟ᑐᛂࡍࡿࢩࣗ࢘㓟࡛ࡣ࡞ࡃࠊࡑࡢ๓ẁ㝵ࡢ࢔࣑ࣀ࢝
ࣝ࣎ࣥ㓟໬ྜ≀࡛࠶ࡿࡇ࡜ࡀࠊ⤖ᬗࡢ 13C NMR ࢫ࣌ࢡࢺࣝ࠿ࡽ᪂ࡓ࡟♧၀ࡉࢀࡓ㸦ᅗ 2㸧ࠋ+ CO or CO2
Methylamine
DMI

Crystalᅗ 2

DMI ࡢ◪㓟୰࡛ࡢຍ⇕࡟ࡼࡿண᝿ศゎ⤒㊰

Malonic acid[1] M. Nogami, et al., Prog. Nucl. Energy, 53, 948 (2011)., [2] 㔝ୖ ௚ࠊ➨ 56 ᅇᨺᑕ໬Ꮫウㄽ఍
Stability of DMPU and DMI for selective U(VI) precipitation against heating
NOGAMI, M., TANAKA, Y., MIYAKE, K., NISHIDA, T., SUZUKI, T., IKEDA, Y. .

- 149 -

P34

▼ᕝ┴ෆࡢ⎔ቃヨᩱ୰ࡢᨺᑕᛶⅣ⣲⃰ᗘࡢ᫬㛫ⓗኚື㸦໭㝣኱⸆㸧Ᏻụ㈡ⱥᏊ㸪‫▼ۑ‬ᕝᩗኈ㸪బࠎᮌ༓჆㸪ᯇ⏣▴ᖾ㸪ᯈὠ⿱ᫀ㸪
ᒣ⏣ⰾ᐀



࠙┠ⓗࠚᡃࠎࡣࠊேⅭⓗ࡟⎔ቃ୰࡟ᨺฟࡉࢀࡓ 14C ࡢ᫬㛫ⓗཬࡧ✵㛫ⓗኚື࡟㛵ࡍࡿ▱ぢࢆᚓࡿ┠ⓗ࡛ࠊ✀ࠎࡢ⎔ቃヨᩱࡢᐃࢆ⾜ࡗ࡚᮶ࡓࠋ㏆ᖺࡣࠊேⅭⓗᙳ㡪ࡢᑡ࡞࠸㎰ᮧ㒊࡛࠶ࡿ▼ᕝ┴㔠ἑᕷᖹ➼ᮏ⏫㸦36.5oN, 136.7oE㸧ཬࡧᾏᓊ㒊࡟఩⨨ࡍࡿ▼ᕝ┴⩚࿳㒆ᚿ㈡⏫㸦37.0oN,
136.8oE㸧࡟࡚኱Ẽ CO2 ࡢ 14C /12C ྠ఩యẚ㸦 14C ⃰ᗘ࡜ࡍࡿ㸧ࢆᐃࡋ࡚࠸ࡿࠋ௒ᅇࡣࠊ୧ᆅ

Ⅼ࡟࠾ࡅࡿ 2013 ᖺࡢ኱Ẽ CO2 ࡢ 14C ⃰ᗘኚືࢆẚ㍑ࡋࡓࠋ᭦࡟ࠊ2013 ᖺࡢ኱Ẽ CO2 ࡢ 14C ⃰ᗘ࡜ 20 ᖺ๓ࡢேⅭⓗᙳ㡪ࡢᑡ࡞࠸㎰ᮧ㒊࡛࠶ࡿ㔠ἑᕷ኱᱓⏫㸦36.3oN, 136.4oE㸧ࡢ኱Ẽ CO2
ࡢ 14C ⃰ᗘࢆẚ㍑ࡋࠊᏘ⠇ኚື࡜ῶᑡ⋡࡟ࡘ࠸᳨࡚ウࢆຍ࠼ࡓࠋࡲࡓࠊ኱Ẽ CO2 ᥇ྲྀᆅⅬ࡜
ྠᆅⅬ࡟࡚✄ࢆ᥇ྲྀࡋࠊ⡿ࡢ 14C ⃰ᗘ࡜኱Ẽ CO2 ࡢ 14C ⃰ᗘ࡜ࡢ┦㛵ࢆ᳨ウࡋࡓࠋ࠙ᐇ㦂ࠚ4M Ỉ㓟໬ࢼࢺ࣒ࣜ࢘⁐ᾮ 2L ࢆ 10 ᪥㛫኱Ẽ࡟᭚㟢ࡋࠊ኱Ẽ CO2 ࢆᤕ㞟ࡋࡓࠋᤕ㞟ᚋࡢ⁐ᾮ࡟ሷ໬࢔ࣥࣔࢽ࣒࢘⁐ᾮࢆῧຍࡋࠊpH ࢆ 11 ௨ୗ࡜ࡋࡓࠋࡇࢀ࡟ࠊሷ໬࢝ࣝࢩ࣒࢘
⁐ᾮࢆΰ࿴ࡋࠊⅣ㓟࢝ࣝࢩ࣒࢘ࢆ⏕ᡂࡋࡓࠋ✄ࡣ᥇ྲྀᚋࠊ஝⇱ࡋࠊศ㞳ࡋࡓ⡿ࢆࠊ㓟໬㖡࡜ඹ࡟▼ⱥ⟶࡟ワࡵࠊ❅⣲㸸㓟⣲㸦1㸸1㸧Ẽὶୗࠊ ᗘࢆ 110Υ࠿ࡽ 800Υࡲ࡛ᚎࠎ࡟ୖ᪼ࡉࡏࠊ
⇞↝ࡋࡓࠋ⇞↝᫬࡟Ⓨ⏕ࡋࡓ஧㓟໬Ⅳ⣲ࡣࠊᾮయ❅⣲࡛෭༷ࡋࡓ࢚ࢱࣀ࣮ࣝࢺࣛࢵࣉ࡛ᤕ㞟ࡋࠊ࢔ࣥࣔࢽ࢔⁐ᾮ࡟྾཰ࡉࡏࡓࠋࡇࡢ⁐ᾮ࠿ࡽࠊⅣ㓟࢝ࣝࢩ࣒࢘ࢆྜᡂࡋࡓࠋⅣ㓟࢝ࣝࢩ࣒࢘ 40g ࡟㐣ሷ⣲㓟ࢆ⁲ୗࡋࠊ஧㓟໬Ⅳ⣲ࢆ෌ᗘⓎ⏕ࡉࡏࠊῶᅽୗ࡟࠾࠸࡚࣋ࣥࢮࣥࢆㄪ〇ࡋࡓࠋㄪ〇ࡋࡓ࣋ࣥࢮࣥ࡟ Butyl PBD Toluene ࢆຍ࠼඲㔞ࢆ 20mL ࡜ࡋࠊᾮయࢩࣥࢳ࣮ࣞࢩࣙ
ࣥ࢝࢘ࣥࢱ࡛

ᐃࡋࡓ㸦ᐃ᫬㛫㸸100 ศ×10 ᅇ×4 ࢧ࢖ࢡࣝ㸧ࠋ࠙⤖ᯝཬࡧ⪃ᐹࠚ2013 ᖺ࡟࠾ࡅࡿ㔠ἑᕷᖹ➼ᮏ⏫ࡢ኱Ẽ CO2 ࡢ 14C ⃰ᗘࡣࠊ4 ᭶࠿ࡽ 6 ᭶༙ࡤࡲ࡛ࡣ኱ࡁ࡞ኚ໬ࡣぢࡽࢀ࡞࠿ࡗࡓࡀࠊࡑࡢᚋࠊ9 ᭶ୖ᪪࡟࠿ࡅ࡚ᚎࠎ࡟ቑຍࡋࠊ෤࡟ῶ
ᑡࡋࡓࠋ㔠ἑᕷᖹ➼ᮏ⏫ࡢ 14C ⃰ᗘኚື࡜⣙ 55km 㞳ࢀࡓᾏᓊ㒊࡟఩⨨ࡍࡿ⩚࿳㒆ᚿ㈡⏫ࡢ኱Ẽ CO2 ࡢ 14C ⃰ᗘኚືࢆẚ㍑ࡍࡿ࡜ࠊ୧⪅ࡢ 14C ⃰ᗘࡣ࡯ࡰ୍⮴ࡋ࡚࠸ࡓࠋࡇࡢࡇ࡜࠿ࡽࠊ2013ᖺ࡟࠾ࡅࡿ኱Ẽ CO2 ࡢ 14C ⃰ᗘࡣ୧ᆅⅬ࡛ࡣ኱ࡁ࡞ᕪࡣ࡞࠿ࡗࡓࡇ࡜ࡀࢃ࠿ࡗࡓࠋᡃࠎࡣࠊ
1991 ᖺ 4 ᭶࠿ࡽ 2000 ᖺ 3 ᭶ࡲ࡛ࡢ⣙ 10 ᖺ㛫ࠊ㔠ἑᕷ኱᱓⏫ࡢ኱Ẽ CO2 ࡢ 14C ⃰ᗘኚືࢆᐃࡋࡓࠋࡇࡢ⤖ᯝ࠿ࡽࠊ኱Ẽ CO2 ࡢ 14C ⃰ᗘࡣ᫓࠿ࡽኟ࡟࠿ࡅ࡚ቑຍࡋࠊ෤࡟ࡣῶᑡࡍࡿ࡜
࠸࠺୍ᐃࡢᏘ⠇ኚືࣃࢱ࣮ࣥࢆ⧞ࡾ㏉ࡋࠊᖺࠎ5͙ῶᑡࡋࡓࡇ࡜ࢆሗ࿌ࡋ࡚࠸ࡿࠋ௒ᅇࠊ ᐃࡋࡓ㔠ἑᕷᖹ➼ᮏ⏫ࡢ኱Ẽ CO2 ࡢ 14C ⃰ᗘ࡟ࡶࠊྠᵝࡢᏘ⠇ኚືࡀㄆࡵࡽࢀࡓࠋࡲࡓࠊ኱Ẽ
CO2 ࡢ 14C ⃰ᗘࡣࠊ20 ᖺ㛫࡛⣙ 100͙ῶᑡࡋ࡚࠸ࡿࡇ࡜ࡀศ࠿ࡗࡓࠋ2013 ᖺࡢ㔠ἑᕷᖹ➼ᮏ⏫
ࡢ⡿ࡢ 14C ⃰ᗘ࡜ 6 ᭶ୗ᪪࠿ࡽ 8 ᭶ୖ᪪ࡢ኱Ẽ CO2 ࡢ 14C ⃰ᗘࡢᖹᆒ್ࢆẚ㍑ࡍࡿ࡜୧⪅࡟኱ࡁ࡞ᕪࡣㄆࡵࡽࢀ࡞࠿ࡗࡓࠋ⩚࿳㒆ᚿ㈡⏫ᑠᾆ࡟࠾࠸࡚ࡶྠᵝࡢ⤖ᯝࡀᚓࡽࢀࡓࠋࡇࡢࡇ࡜࠿ࡽࠊ
⡿ࡢ 14C ⃰ᗘࡣࠊ⡿ࡀᡂ㛗ࡍࡿᮇ㛫ࡢ኱Ẽ CO2 ࡢ 14C ⃰ᗘࢆ཯ᫎࡋ࡚࠸ࡿࡇ࡜ࡀࢃ࠿ࡗࡓࠋ⡿ࡢ
14C ⃰ᗘࢆ ᐃࡍࡿࡇ࡜࡛ࠊ኱Ẽ CO2 ࡢ 14C ⃰ᗘࡢ᫬㛫ⓗཬࡧ✵㛫ⓗኚືࢆᢕᥱࡍࡿࡇ࡜ࡀྍ⬟࡛࠶ࡿࠋTemporal variations of carbon-14 concentrations in environmental samples in Ishikawa Prefecture
YASUIKE, K., ISHIKAWA, T., SASAKI, C., MATSUDA, N., ITAZU, H., YAMADA, Y.

- 150 -

P35

⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾᚋࡢ▼ᕝ┴㔠ἑᕷෆࡢ⎔ቃ୰ࡢࢺࣜࢳ࣒࢘
⃰ᗘཬࡧ C-14 ⃰ᗘࡢኚື㸦໭㝣኱⸆㸧‫ۑ‬Ᏻụ㈡ⱥᏊ㸪ᮌᓮᙲ๎㸪ᓥ⏣㝧௓㸪ᒣ⏣ⰾ᐀࠙┠ⓗࠚ⎔ቃ୰ࡢࢺࣜࢳ࣒࢘⃰ᗘࡣᖺࠎῶᑡഴྥ࡟࠶ࡾࠊ▼ᕝ┴㔠ἑᕷ࡟࠾࠸࡚ࡣ㏆ᖺ 1Bq/Lᮍ‶ࡲ࡛ῶᑡࡋ࡚࠸ࡓࠋ2011 ᖺ 3 ᭶ 11 ᪥ࠊ⚟ᓥ┴Ἀᆅ㟈ཬࡧὠἼࡢᙳ㡪࡟ࡼࡾࠊ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾࡀⓎ⏕ࡋࡓࠋ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾࡀ▼ᕝ┴㔠ἑᕷࡢ⎔ቃ୰ࡢࢺࣜࢳ࢘
࣒⃰ᗘ࡟୚࠼ࡿᙳ㡪ࢆ᳨ウࡍࡿࡓࡵ࡟ࠊ஦ᨾᚋࠊ㔠ἑᕷෆ࡟࠾࠸࡚㝆Ỉ୰ࡢࢺࣜࢳ࣒࢘⃰ᗘࡢኚືࢆᐃࡋࡓࠋྜࢃࡏ࡚ࠊ኱Ẽ CO2 ࡢ 14C/12C ྠ఩యẚ㸦14C ⃰ᗘ࡜ࡍࡿ㸧ࡢኚືࡶᐃࡋࡓࠋ2011 ᖺ 3 ᭶࠿ࡽ 9 ᭶ࡲ࡛ࡢ୧⪅ࡢኚື࡟ࡘ࠸࡚ሗ࿌ࡍࡿࠋoo࠙ᐇ㦂ࠚ໭㝣኱Ꮫ⸆Ꮫ㒊㸦36.5 N,136.7 E㸧ᵓෆ࡟タ⨨ࡋࡓ 560mm405mm ࡢࢫࢸࣥࣞࢫ〇ࡢࣂࢵࢺ࡛ࠊ㝆㞵࠶ࡿ࠸ࡣ㝆㞷ࡈ࡜࡟㝆Ỉࢆ᥇ྲྀࡋࡓࠋ᥇ྲྀࡋࡓ㝆Ỉࡣࠊ୙⣧≀ࢆྲྀࡾ㝖ࡃ
ࡓࡵࠊKMnO4 ࢆῧຍࡋࠊῶᅽ⵨␃ࡋࡓࠋヨᩱỈ 40mL ࢆ 100mL ࢸࣇࣟࣥࣂ࢖࢔ࣝ࡟ධࢀࠊங
໬ࢩࣥࢳ࣮ࣞࢱ ULTIMA GOLD LLT㸦Perkin Elmer 〇㸧60mL ࡜ΰྜࡋࠊ ᐃヨᩱࢆㄪ〇ࡋࡓࠋᐃヨᩱࡣࠊ3 ᪥㛫෭ᬯᡤ࡛ಖᏑࡋࡓᚋࠊపࣂࢵࢢࢢࣛ࢘ࣥࢻ㸦BG㸧ᾮయࢩࣥࢳ࣮ࣞࢩࣙࣥ
࢝࢘ࣥࢱ Aloka LSC-LBV ࡛ᐃࡋࡓ㸦50 ศ20 ᅇ4 ࢧ࢖ࢡࣝ㸧ࠋ኱Ẽ CO2 ࡣࠊ4M Ỉ㓟໬ࢼࢺ࣒ࣜ࢘⁐ᾮ 2L ࢆ 10 ᪥㛫኱Ẽ࡟᭚㟢ࡋࠊᤕ㞟ࡋࡓࠋࡇࡢ⁐ᾮ࡟ NH4Cl ⁐ᾮࢆῧຍࡋࠊpHࢆ 11 ௨ୗ࡜ࡋࡓࠋࡇࢀ࡟ࠊCaCl ⁐ᾮࢆΰ࿴ࡋࠊCaCO3 ࢆ⏕ᡂࡋࡓࠋCaCO3 40g ࡟ HClO4 ࢆ⁲ୗࡋࠊCO2 ࢆ෌ᗘⓎ⏕ࡉࡏࠊῶᅽୗ࡟࠾࠸࡚ C6H6 ࢆㄪ〇ࡋࡓࠋㄪ〇ࡋࡓ C6H6 ࡟ Butyl PBD
Toluene ࢆຍ࠼඲㔞ࢆ 20mL ࡜ࡋࠊప BG ᾮయࢩࣥࢳ࣮ࣞࢩࣙࣥ࢝࢘ࣥࢱ Aloka-LBϪ࡛ᐃࡋࡓ㸦100 ศ×10 ᅇ×4 ࢧ࢖ࢡࣝ㸧ࠋ࠙⤖ᯝཬࡧ⪃ᐹࠚ㔠ἑᕷ࡟࠾ࡅࡿ㝆Ỉ୰ࡢࢺࣜࢳ࣒࢘⃰ᗘࡢኚ⛣ࡣࠊ௨ୗࡢ࡜࠾ࡾ࡛࠶ࡿࠋ3
᭶ 16 ᪥ 9:00㹼20:30 ࡢ㝆㞷࡛ 15.23Bq/L ࡢ್ࢆ♧ࡋࡓᚋࠊ3 ᭶ 22 ᪥ 14:40㹼18:00 ࡢ㝆㞵࡛ࡣ
0.5Bq/L ⛬ᗘࡲ࡛ῶᑡࡋࡓࠋࡋ࠿ࡋࠊࡑࡢ┤ᚋ࡟㝆ࡗࡓࡳࡒࢀ࡛ࡣ 4.65Bq/L ࡲ࡛෌ࡧୖ᪼ࡋ
ࡓࠋࡇࢀࡣ 3 ᭶ 11 ᪥㹼3 ᭶ 15 ᪥࠿ࡅ࡚⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ࠿ࡽࢺࣜࢳ࣒࢘ࡀ⎔ቃ୰࡟ᨺฟ
ࡉࢀࠊࡉࡽ࡟ࠊ3 ᭶ 21 ᪥㹼3 ᭶ 22 ᪥࡟࠿ࡅ࡚෌ࡧࢺࣜࢳ࣒࢘ࡀᨺฟࡉࢀࡓࡇ࡜ࢆ♧၀ࡋ࡚࠸ࡿࠋࡑࡢᚋࡢ㝆Ỉ୰ࡢࢺࣜࢳ࣒࢘ࡢ⃰ᗘࡣ 4 ᭶୰᪪㹼ୗ᪪ཬࡧ 5 ᭶ୗ᪪࡟ࡣᖹᖖ್ࡢ 2 ಸ㏆ࡃࡲࡲ࡛ୖ᪼ࡍࡿࡇ࡜ࡣ࠶ࡗࡓࡀࠊ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤࡢᙳ㡪ࡣ࡯࡜ࢇ࡝ぢࡽࢀ࡞ࡃ࡞ࡗ
ࡓࠋ5 ᭶ 30 ᪥ 9:00㹼13:40 ࡢ㝆㞵࡛ࡣࢺࣜࢳ࣒࢘⃰ᗘࡣ 131.64Bq/Lࠊ6 ᭶ 13 ᪥ 21:30㹼14 ᪥
9:00 ࡢ㝆㞵࡛ࡣ 99.95Bq/L ᳨ฟࡉࢀࡓࠋࡇࡢཎᅉ࡜ࡋ࡚ࠊձ ኱Ẽୖᒙ㒊࡟ᕳࡁୖࡆࡽࢀࠊ೵
⁫ࡋ࡚࠸ࡓࢺࣜࢳ࣒࢘ࡀపẼᅽࡢ㏻㐣࡟క࠸ᆅ⾲࡟ᡠࡉࢀࡓࠊղ 㧗⃰ᗘࡢࢺࣜࢳ࣒࢘ࢆྵࡴ
ởᰁỈࡀᾏỈ࡟ὶฟࡋࠊ⵨Ⓨࡋࡓࡇ࡜࡛ࠊ㝆Ỉ࡜ࡋ࡚㔠ἑࡲ࡛ὶࢀ࡚ࡁࡓࠊ࡜⪃࠼࡚࠸ࡿࠋ
ྠᮇ㛫ࡢ኱Ẽ CO2 ࡢ 14C ⃰ᗘኚືࡣࠊ3 ᭶࠿ࡽ 9 ᭶࡟࠿ࡅ࡚ᚎࠎ࡟ୖ᪼ࡍࡿ࡜࠸࠺㐣ཤ࡟ᐃࡋࡓ኱Ẽ CO2 ࡢ 14C ⃰ᗘࡢᏘ⠇ኚື࡜ྠᵝ࡛࠶ࡗࡓࠋ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ஦ᨾࡢᙳ㡪ࡣࠊ኱Ẽ CO2 ࡢ 14C ⃰ᗘ࡟ࡣほᐹࡉࢀ࡞࠿ࡗࡓࠋ
Variations of tritium concentrations and carbon-14 concentrations in environmental samples in
Kanazawa city, Ishikawa prefecture after the accident at the Fukushima No. 1 nuclear power plant
YASUIKE, K., KIZAKI, A., SHIMADA, Y., YAMADA, Y.

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P36

$06 ἲ࡟ࡼࡿ , ศᯒ࡟࠾ࡅࡿᶆ‽ヨᩱࢆ⏝࠸ࡓ⢭ᗘ⟶⌮⎔ቃ◊ 1㸪⌧ᡤᒓ㸸᰾⼥ྜ◊ 2㸪஑⎔༠ 3 ‫ۑ‬ᰠෆ⚽ᶞ 1㸪㉥⏣ᑦྐ 1,2㸪ᕝᮧ⚽ஂ 3㸪ኳ᪥⨾⸅ 3㸪ஂᯇಇ୍ 1䛆⥴ゝ䛇 I ࡢᨺᑕᛶྠ఩య࡛࠶ࡿ 129I ࡣࠊș⥺ᨺฟ᰾✀࡛࠶ࡾࠊࡑࡢ≀⌮Ꮫⓗ༙ῶᮇࡣ 1570 ୓ᖺ࡛࠶ࡿࠋࡇࡢ 129I ࡣࠊᏱᐂ⥺࡜኱Ẽ୰ࡢ࢟ࢭࣀࣥ࡜ࡢ཯ᛂ࡞࡝࡛ᴟᑡ㔞࡞ࡀࡽ⮬↛⏺࡛ࡶ⏕ᡂࡉࢀࡿ୍᪉ࠊཎᏊ⅔࡛ࡶ⏕ᡂࡉࢀࠊ౑⏝῭⇞ᩱࢆ෌ฎ⌮ࡍࡿ㐣⛬࡛⎔ቃ୰࡟ᨺฟࡉࢀࡿࠋ኱Ẽ୰࡟ᨺฟࡉࢀࡓ 129I ࡢ୍㒊ࡣ෌ฎ⌮᪋タ࿘㎶ࡢᅵተ࡟⵳✚ࡉࢀࡿࡇ࡜ࡀ▱ࡽࢀ࡚࠸ࡿࠋභࢣᡤᮧ࡟࠾ࡅ
ࡿ኱ᆺ⇞ᩱ෌ฎ⌮᪋タᮏ࿘㎶ࡢ 129I ⃰ᗘࣞ࣋ࣝࢆᢕᥱࡍࡿࡓࡵࠊභࢣᡤᮧࡢᮍ⪔ᆅࠊ࠾ࡼࡧ⪔సᆅ࡟࠾࠸࡚᥇ྲྀࡋࡓᅵተࡸ᳜≀ヨᩱࢆ AMS㸦Accelerator Mass Spectrometer㸧ἲ࡟ࡼࡾ 129I ࢆ ᐃࡋ࡚࠸ࡿࠋᅵተヨᩱ࡜᳜≀ヨᩱ࡛ࡣヨᩱ୰ I ⃰ᗘࡀ኱ࡁࡃ␗࡞ࡿࡓࡵ 129I ⃰ᗘࡶ኱ࡁࡃ␗࡞ࡿࠋ
ࡋࡓࡀࡗ࡚⎔ቃヨᩱ୰ 129I ศᯒ࡟ᙜࡓࡾᅵተヨᩱ࡜᳜≀ヨᩱࡑࢀࡒࢀ࡟ࡘ࠸࡚ရ㉁⟶⌮ࢆ⾜࠺ᚲせࡀ࠶ࡿࠋࡋ࠿ࡋ 129I ⃰ᗘࡀㄆドࡉࢀ࡚࠸ࡿᶆ‽ヨᩱࡣ IAEA-375㸦soil㸧ࡢࡳ࡛࠶ࡿࠋࡑࡇ࡛
IAEA-375 ࡜ 129I ⃰ᗘࡀ IAEA-375 ࡼࡾప࠸࡜ぢ㎸ࡲࢀࡿ᭷ᶵ≀ࡢᶆ‽ヨᩱࡢ⧞ࡾ㏉ࡋศᯒࢆ⾜ࡗ࡚⢭ᗘ⟶⌮ࢆ⾜ࡗࡓ⤖ᯝ࡟ࡘ࠸࡚ሗ࿌ࡍࡿࠋ

-1129

䛆⤖ᯝ䛸⪃ᐹ䛇Fig. 1 ࡟ᶆ‽ヨᩱ୰
129
I ⃰ᗘࡢ ᐃ⤖ᯝࢆ♧ࡍࠋIAEA
375 ୰ 129I ⃰ᗘࡢᖹᆒ್ࡣ(1.6s0.2)
x10-6 Bq g-1-dry (n=21)࡛࠶ࡾࠊ129I
ㄆド್ 1.7 x10-6 Bq g-1 -dry (95%ಙ㢗༊㛫 1.3-2.1 x10-6 Bq g-1 -dry)࡜ࡼ
ࡃ୍⮴ࡋࡓࠋNIST-1547 ୰ 129I ⃰ᗘࡣ(2.1s0.3) x10-7 Bq g-1-dry (n=20)ࠊ
NIST-8435 ୰ 129I ⃰ᗘࡣ(8s2) x10-9
Bq g-1-dry (n=17) ࡛ ࠶ ࡗ ࡓ ࠋ
NIST-1547ࠊNIST -8435 ࡣ IAEA 375
࡜ẚ㍑ࡋ࡚ 1 ᱆࠿ࡽ 2 ᱆ప࠸ 129I
⃰ᗘ࡛࠶ࡗࡓࡀ෌⌧ᛶࡼࡃ ᐃࡀ⾜ࢃࢀ࡚࠸ࡿࡇ࡜ࡀ☜ㄆ࡛ࡁࡓࠋ
௒ᅇ⏝࠸ࡓᶆ‽ヨᩱࢆ⏝࠸࡚ࠊ⎔ቃヨᩱ୰ 129I ศᯒࡢရ㉁⟶⌮ࢆ⾜࠺஦ࡀ࡛ࡁࡿࡇ࡜ࡀ♧ࡉࢀࡓࠋI concentration (Bq g -dry)䛆ᐇ㦂䛇ヨᩱ࡜ࡋ࡚ 129I ⃰ᗘࡀㄆドࡉࢀ࡚࠸ࡿ IAEA-375㸦soil㸧ࡢ௚࡟ࠊNIST-8435 (whole milk powder)ࠊ
NIST-1547 (peach leaves)ࢆ⏝࠸ࡓࠋ▼ⱥ〇⟶≧⅔ࢆ⏝࠸࡚ヨᩱࢆ 900oC ࡛↝ࡁฟࡋࠊ᥹Ⓨࡋࡓ I ࢆ
tetra methyl ammonium hydroxide ⁐ᾮ࡟ᤕ㞟ᚋࠊAgI ࡜ࡋ࡚ỿẊࡉࡏࠊỿẊ୰ 129I ࢆࣃࢹ࣮ࣗ኱Ꮫ
ࡢ AMS ࡟ࡼࡾᐃ㔞ࡋࡓࠋ

1E-5
1E-6
1E-7
1E-8
1E-9

NIST-8435(n= 17)

NIST-1547(n= 20)

IAEA375(n= 21)

Fig. 1 Concentration of 129I in reference materials.
Error bars on data are standard deviations of 17 to
21 replicates.

ᮏグ㍕஦㡯ࡣ㟷᳃┴࠿ࡽࡢཷク஦ᴗ࡟ࡼࡾᚓࡽࢀࡓᡂᯝࡢ୍㒊࡛࠶ࡿࠋ 129I
Marc Caffee ᩍᤵࠊ Susan Ma Ặ࡟ࡈ༠ຊ㡬࠸ࡓࠋグࡋ࡚ᚚ♩⏦ࡋୖࡆࡲࡍࠋ

Quality assurance of 129I analysis by AMS.
KAKIUCH, H., AKATA, N., KAWAMURA,H., TENNICHI ,Y., HISAMATSU, S.

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ᐃࡣ Purdue ኱ᏛP37ᅵተ୰ࢸࢡࢿࢳ࣒࢘ ศᯒἲࡢ☜❧ཎᏊຊᶵᵓ  ‫ۑ‬஭ୖ࿴⨾ ࠊ⸨⏣༤႐ ࠊึᕝ㞝୍ 䛆䛿䛨䜑䛻䛇
ࢸࢡࢿࢳ࣒࢘-99㸦99Tcࠊ༙ῶᮇ⣙ 21 ୓ᖺ㸧ࡣ᰾ศ⿣⏕ᡂ≀࡛࠶ࡾࠊ኱Ẽᅪෆ᰾ᐇ㦂ࠊཎᏊຊ᪋タ➼ࢆ㉳※࡜ࡋ࡚⎔ቃ୰࡟Ꮡᅾࡍࡿࠋ⎔ቃ୰࡟Ꮡᅾࡍࡿ 99Tc ࡣࠊࡑࡢ༙ῶᮇࡀ㛗࠸ࡇ࡜࠿ࡽࠊ㛗ᮇⓗ࡞⎔ቃࣔࢽࢱࣜࣥࢢࡢほⅬ࡟࠾࠸࡚㔜せ࡞᰾✀࡛࠶ࡿࠋࡋ࠿ࡋࠊࡑࡢᨺᑕ⬟⃰ᗘࡣ⾲ᅵ୰࡛ 10-2㹼10-1 Bq/kg࣭dry ⛬ᗘ࡜పࡃࠊࡲࡓ⣧ș᰾✀࡛࠶ࡿ㸦șmax= 0.294 MeV㸧ࡓࡵࠊศᯒ࣭ ᐃࡀᅔ㞴࡞᰾✀ࡢ୍ࡘ࡛࠶ࡿࡇ࡜࠿ࡽࠊ㛗ᮇⓗ࡞ࣔࢽࢱࣜࣥࢢࡣᐇ᪋ࡉࢀ࡚࠸
࡞࠸ࠋࡇࡢࡓࡵࠊᐃᖖⓗ࡞ࣔࢽࢱࣜࣥࢢ࡬ࡢ㐺⏝ࢆ┠ⓗ࡜ࡋ࡚ࠊᅵተ୰ࡢ 99Tc ศᯒἲ࡟ࡘ࠸᳨࡚ウࡋࡓࠋ
㻌䛆ᐇ㦂䞉⤖ᯝ䛇 ᅵተヨᩱ
ᅵተヨᩱࡢ๓ฎ⌮ἲ࡜ࡋ࡚ࠊ⇞↝ἲ࡜ᾐฟἲࡢ 2 ✀㢮ࢆ᳨ウ  Tc-9999
ຍ⇕ 550Υࡋࡓࠋࡲࡎࡣࠊ10 g ࡢᅵተヨᩱ࡟ Tc ࢆ 2 Bq ῧຍࡋࠊ⇞↝ἲ   3 M ሷ㓟ཬࡧᾐฟἲ࡟ࡼࡾࡑࢀࡒࢀ๓ฎ⌮ࢆ⾜࠸ࠊヨᩱ୰࡟ྵࡲࢀࡿ   㐣㓟໬Ỉ⣲Ỉ99ຍ⇕࣭⇍ᡂTc ⃰ᗘࢆ㧗࿘Ἴㄏᑟ⤖ྜࣉࣛࢬ࣐㉁㔞ศᯒ⿦⨨㸦ICP-MS㸧࡛ᐃࡋࠊᅇ཰⋡ࢆồࡵࡓࠋࢁ㐣⇞↝ἲ࡛ࡣᅗ 1 ࡟♧ࡋࡓ⇞↝⿦⨨࡟ࡼࡾᅵተࢆ 200㹼1000Υࢁᾮ     ỿẊ ᤞ࡚ࡿ
࡛ẁ㝵ⓗ࡟ຍ⇕ࡋࠊ⇞↝࢞ࢫ୰ࡢ 99Tc ࢆ࢔ࣝ࢝ࣜ⁐ᾮ࡛ᤕ㞟ࡋ  ࣆࣟள◲㓟࣒࢝ࣜ࢘  6 M Ỉ㓟໬ࢼࢺ࣒ࣜ࢘
ࡓࠋ୍᪉ࠊᾐฟἲ࡛ࡣᅗ 2 ࡟♧ࡍࣇ࣮ࣟ࡟ࡼࡾᅵተ୰ࡢ 99Tc
㐲ᚰศ㞳ࢆᾐฟࡋ࡚ศᯒࡋࡓࠋࡇࢀࡽࡢ๓ฎ⌮ἲ࡛⁐ᾮ໬ࡋࡓヨᩱࡣࠊỿẊ      ୖ⃈ࡳ ᤞ࡚ࡿ
TEVA ࣞࢪࣥࢆ⏝࠸࡚໬Ꮫศ㞳ࢆ⾜ࡗࡓࠋ
8 M ◪㓟
ᐃ⤖ᯝ࡜ࡋ࡚ࡣࠊ⇞↝ἲ࡛ࡣᏳᐃࡋࡓᅇ཰⋡ࢆᚓࡽࢀ࡞࠿
㐣㓟໬Ỉ⣲Ỉ
6 M Ỉ㓟໬ࢼࢺ࣒ࣜ࢘
ࡗࡓࡀࠊᾐฟἲ࡛ࡣ⣙ 80㸣⛬ᗘࡢᅇ཰⋡ࢆᏳᐃࡋ࡚ᚓࡽࢀࡓࠋ
㐲ᚰศ㞳ḟ࡟ࠊ50 g ࡢᅵተヨᩱ࡟ 99Tc ࢆῧຍࡋࠊᾐฟἲ࡟ࡼࡾศᯒࡋ
ỿẊ          ୖ⃈ࡳࡓ⤖ᯝࠊ⣙ 70%ࡢᅇ཰⋡ࢆᏳᐃࡋ࡚ᚓࡽࢀࡓࠋ
8M◪㓟௨ୖࡢࡇ࡜࠿ࡽࠊᅵተ୰ 99Tc ศᯒἲ࡟࠾ࡅࡿ๓ฎ⌮ἲ࡜ࡋ࡚㐣㓟໬Ỉ⣲Ỉ
6 M Ỉ㓟໬ࢼࢺ࣒ࣜ࢘
ᾐฟἲࢆ㐺⏝ࡍࡿࡇ࡜࡟ࡋࡓࠋ 㐲ᚰศ㞳
ୖ⃈ࡳ      ỿẊ ᤞ࡚ࡿ
8 M ◪㓟
㐣㓟໬Ỉ⣲Ỉ
ຍ⇕࣭෭༷
TEVA
࣒࢝ࣛ

0.1 M ◪㓟
2 M ◪㓟
8 M ◪㓟ຍ⇕⃰⦰ ࣓ࢫ࢔ࢵࣉ࣭ICP-MSᐃᅗ㸰㸬ศᯒࣇ࣮ࣟ

ᅗ㸯㸬⇞↝⿦⨨Establishment of Analytical Method for Technetium-99 in Soil
INOUE, K., FUJITA, H., HATSUKAWA, Y..

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㏲ḟᢳฟἲࢆ฼⏝ࡋࡓᅵተ୰ࡢ , ࡜ , ࡢ࢚࣮ࢪࣥࢢຠᯝࡢㄪᰝ
⟃Ἴ኱Ꮫ㝔ᩘ⌮ ࠊᮾ኱ 0$/7ࠊᮾ኱㝔ཎᏊຊ ࠊ᪥኱ᩥ⌮ ࠊ⟃Ἴ኱ᩘ⌮≀㉁ ‫ۑ‬ᮏከ┿⣖ ࠊᯇᓮᾈஅ ࠊᩧ⸨ᣅᕭ ࠊỌ஭ᑦ⏕ ࠊᮎᮌၨ௓ 䛆⥴ゝ䛇᪥ᮏࡢᅵተ࡟ࡣࠊᩘ༓ᖺࢫࢣ࣮࡛ࣝᾏὒ࠿ࡽ⥅⥆ⓗ࡟౪⤥ࡉࢀ࡚࠸ࡿᐃᖖ≧ែࡢ 127I ࡀᏑᅾࡋ࡚࠸ࡿࠋ
ᐃᖖ≧ែ࡛࠶ࡿࡓࡵ࡟᫬㛫⤒㐣࡟ࡼࡿ 127I ࡢᅵተ୰ࡢᏑᅾᙧែࡢኚ໬㸦࢚࣮ࢪࣥࢢຠᯝ㸧ࡸࠊࡑࡢ῝ࡉ౫Ꮡᛶࢆㄪᰝࡍࡿࡇ࡜ࡣᅔ㞴࡛࠶ࡿࠋࡑࡇ࡛༙ῶᮇ 1570 ୓ᖺࡢ I-129 ࢆࢺ࣮ࣞࢧ࣮࡜ࡋ࡚ 127I ࡢᏑᅾᙧែࡢ⤒᫬ኚ໬ࢆ᥎ᐃࡍࡿࠋ129I ࡣ኱Ẽᅪෆ᰾ᐇ㦂ཬࡧ౑⏝῭ࡳ᰾⇞ᩱ෌ฎ⌮ᕤሙ࠿ࡽࡢᨺฟ࡟ࡼࡾ⣙60 ᖺ๓࠿ࡽ኱Ẽ୰࡟౪⤥ࡉࢀ࡚࠸ࡿࠋ᰾✀㛫࡛ࡢ᫬㛫ࢫࢣ࣮ࣝࡢ㐪࠸࡟ࡼࡗ࡚ࠊᅵተ୰࡛ࡢᏑᅾᙧែ
ࡢศᕸ๭ྜࡀ␗࡞ࡿࡇ࡜ࡀ᥎ᐃࡉࢀࡿࡢ࡛ࡇࢀࢆ฼⏝ࡍࡿࠋ129I ࡣ 2011 ᖺ 3 ᭶࡟Ⓨ⏕ࡋࡓ⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤ㸦FDNPP㸧ࡢ஦ᨾ࡛ࡶ኱Ẽ୰࡟ᨺฟࡉࢀᅵተ࡟㝆ୗࡋࡓࠋᨺฟ※ࡀ᫂☜࡛࠶ࡾ▷ᮇ㛫࡟ᨺฟࡉࢀࡓ஦ᨾ⏤᮶ࡢ 129I ࡣᅵተ୰ࡢࣚ࢘⣲ࡢᣲືࢆ▱ࡿ࠺࠼࡛᭷⏝࡞᰾✀࡛࠶ࡿࡓࡵࠊᮏ◊✲࡛ࡣ஦ᨾᚋ࡟㣤⯓ᮧ࡛᥇ྲྀࡋࡓᅵተࢆ⏝࠸࡚ศ⏬ᐇ㦂ࢆ⾜ࡗࡓࠋ
䛆ᐇ㦂䛇
129

I ࡢᏑᅾᙧែࡢ῝ࡉ౫Ꮡᛶࢆㄪᰝࡍࡿࡓࡵ࡟ࠊ㣤⯓ᮧᮌᡞᆅ༊ࡢ⏿ᅵ࡛᥇ྲྀࡋࡓᅵተࢥ࢔ࡢ⾲ᒙ࠿

ࡽ 4 ᒙ㸦῝ࡉ⣙ 7 cm ┦ᙜ㸧ࢆศ⏬ᐇ㦂࡟౪ࡋࡓࠋྠ఩య㛫ࡢ㐪࠸ࢆㄪᰝࡍࡿࡓࡵ࡟ࠊ඲࡚ࡢᒙࡢ඲ศ
⏬ᡂศ࡟࠾࠸࡚ࠊ127I ࠾ࡼࡧ 129I ࡢᐃࢆ⾜ࡗࡓࠋࡲࡓ෌⌧ᛶࢆࡳࡿࡓࡵ࡟ࠊྠࡌሙᡤ࡛᥇ྲྀࡋࡓูࡢ

ᅵተࢥ࢔ࡢ⾲ᒙ 1 ᒙ㸦⣙ 2 cm㸧ࡢศ⏬ᐇ㦂ࢆ 3 ᅇ⾜ࡗࡓࠋྛᒙ࠿ࡽ‵ᅵ 0.2 g ࢆศྲྀࡋ 30 mL ࡢ㉸⣧Ỉࠊ1 M 㓑㓟࢔ࣥࣔࢽ࣒࢘⁐ᾮ㸦pH 7㸧
ࠊ0.04 M ሷ㓟ࣄࢻࣟ࢟ࢩࣝ࢔࣑ࣥ/25%㓑㓟⁐ᾮ㸦pH 2.0㸧ࠊ5%Ỉ㓟໬ࢸࢺ࣓ࣛࢳࣝ࢔ࣥࣔࢽ࣒࢘㸦TMAH㸧࡟ࡼࡿᢳฟࢆ⾜࠸Ỉ⁐ᛶࠊ࢖࢜ࣥ஺᥮ᛶࠊ㕲࣭࣐ࣥ࢞ࣥࠊ
᭷ᶵ≀ศ⏬ࡑࢀࡒࢀࢆᚓࡓࠋ㸦㖔≀࡜ࣄ࣮࣑ࣗࣥࢆྵࡴ㸧ṧࡉࡣࠊ⇕ຍỈศゎἲ[1]࡟࡚ࣚ࢘⣲ࢆᢳฟࡋࡓࠋṧࡉࢆྵࡴ 5 ࡘࡢศ⏬࡟ᑐࡋ࡚ࠊ127I ࡢᐃ࡟ࡣ ICP-MS ࢆࠊ129I ࡟ࡣຍ㏿ჾ㉁㔞ศᯒࢆ⾜࠸ᐃ㔞ࡋࡓࠋ䛆⤖ᯝ䞉⪃ᐹ䛇 ᅵተ୰ࡢ 129I ࡣ⣙ 60%ࡀ㠀ᬗ㉁ࡢ㕲࣭࣐ࣥ࢞ࣥ㓟໬≀࡟ࠊ
⣙ 30%ࡀ ᭷ ᶵ ≀ ࡟ ໬ Ꮫ ྾ ╔ ࡋ ࡚ ࠸ ࡿ ⤖ ᯝ ࡜ ࡞ ࡗ ࡓ ࠋWhitehead ࡽ࡟ࡼࢀࡤ[2]ࠊ๓⪅ࡢሙྜࡣ IO3Ѹࡀ㖔≀⾲㠃ࡢỈ㓟ᇶ࡜ࡢ཯ᛂ࡛ࠊእᅪ㘒యࡲࡓࡣෆᅪ㘒యᆺࡢ໬Ꮫᙧែ
ࢆࡋ࡚࠾ࡾࠊᚋ⪅ࡢሙྜࡣ᭷ᶵ≀ࡢᵓᡂඖ⣲࡛࠶ࡿⅣ⣲࡜┤᥋ඹ᭷⤖ྜࡋ࡚࠸ࡿࡇ࡜ࡀண᝿ࡉࢀࡿࠋ5-10%ࡢ 129I ࡀ⛣ືᛶࡢ㧗࠸⏬ศ (Ỉ⁐ᛶࠊ࢖࢜ࣥ஺᥮ᛶ) ࡟Ꮡᅾࡍࡿࡢ
࡟ᑐࡋ࡚ 127I ࡛ࡣ 1-3%࡛࠶ࡿࡇ࡜࠿ࡽࠊ⚟ᓥࡢᅵተ࡛ࡶ
ྠ఩య㛫࡛ศᕸࡀ␗࡞ࡿࡇ࡜ࢆ♧၀ࡋ࡚࠸ࡿࠋᑡ࡞ࡃ࡜ࡶ
⾲ᒙ⣙ 7 cm ࡲ࡛࡛ࡣ 129I ࡢ໬Ꮫᙧែࡢศᕸࡢ῝ࡉ౫Ꮡᛶࡣ࡞࠸ࠋ ࡇࢀࡣ㝆ୗࡋ࡚ࡁࡓ 129I ࢆ྾╔ࡍࡿഃࡢ྾╔⬟ຊࡀỴࡲࡗ࡚࠾ࡾ 129I ࡢᏑᅾ๭ྜࡣᅵተ୰ࡢ 129I ⃰ᗘ࡟౫Ꮡࡋ࡞࠸ࡇ࡜ࢆ♧၀ࡋ࡚࠸ࡿࠋᅗ ⏿ᅵ୰࡟࠾ࡅࡿ 127I ࡜஦ᨾ⏤᮶ 129I

䛆ཧ⪃ᩥ⊩䛇

ࡢᏑᅾᙧែࡢศᕸ๭ྜ

[1] Y. Muramatsu et al., Quat. Geochronol., 3, pp291-297 (2008)[2] D.C. Whitehead et al., J. Sci. Fd Agric., 25, pp73-79 (1974)

A study for aging effect of I-127 and I-129 used sequential extraction
HONDA, M., HIROYUKI, M., SAITO, T., NAGAI, H., SUEKI, K.

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P39

᏷㐨†࣭୰ᾏ㸦ỶỈ†㸧࡟࠾ࡅࡿ 5D5D ẚࡢศᕸ≉ᛶ㸦ᓥ᰿኱ᩍ⫱ ࠊ㔠ἑ኱ LLRLࠊᾏὒ᣺⯆㈈ᅋ 㸧‫ۑ‬㔝ᮧᚊኵ ࠊ஭ୖ╬ኵ ࠊᑠ⸨ஂẎ 䛆⥴ゝ䛇㻌 ỶỈᇦ࡛ࡢỈࡢὶືࡣ㸪Ỉࡢࡶࡘሷศࡢ㐪࠸࡟ࡼࡗ࡚᥎ ࡉࢀࡿࠋࡋ࠿ࡋ㸪᥎ ࡉࢀࡓỈࡢὶື࡟ࡣ᪂ᪧࡢ᫬㛫ᴫᛕࡀ↓࠸࡞࡝ࡢၥ㢟ࡀ࠶ࡿࠋࡓ࡜࠼ࡤ㸪㛢㙐ᛶỈᇦ࡛೵⁫ࡋࡓ͆ྂ࠸͇Ỉ࡟Ỉᇦእ࠿ࡽ ͆᪂ࡋ࠸͇Ỉࡀὶධࡍࡿሙྜ㸪ᨺᑕᛶඖ⣲ࢆ฼⏝ࡍࢀࡤ᪂ᪧࡢỈࡢΰྜ㐣⛬ࢆ᫬㛫ⓗ࡟㏣㊧࡛ࡁࡼ࠺ࠋỈࡢὶື≉ᛶࢆ⌮ゎࡍࡿࡇ࡜ࡣ㸪ἢᓊỶỈᇦࡢỈ⎔ቃࡢಖ඲࡟࡜ࡗ࡚㔜せ࡞ࡇ࡜࡜⪃࠼ࡽࢀࡿࠋᾏእ࡛ࡣ㸪ᨺᑕᛶྠ఩యࢆ⏝࠸ࡓ᪉ἲ࡛ἢᓊỈࡢ⁫␃᪥ᩘࢆồࡵࡿ࡞࡝㸪᫬㛫ᴫᛕࢆᑟධࡋ࡚࠸ࡿ◊✲ࡶ࠶ࡿ(Moore et al., 2006)ࠋἢᓊỶỈᇦࡢὶື≉ᛶࡢ⌮ゎࡢࡓࡵ࡟ࡣ༙ῶᮇࡢ▷࠸ࣛࢪ࣒࢘㸦224Ra㸸༙ῶᮇ 3.66 ᪥㸧࡜༙ῶᮇࡢ㛗࠸ࣛࢪ࣒࢘㸦228Ra㸸༙ῶᮇ 5.75 ᖺ㸧ࡢ฼⏝ࡀຠᯝⓗ࡛࠶ࡿࠋࣛࢪ࣒࢘ࡣⰼᓵᒾ㉁ࡢᒾ▼࡟ከࡃྵࡲࢀ࡚࠾ࡾ㸪ἢᓊࡢ◁὾ࡸ†ᗏࡢ࣊ࢻࣟ࡟ከࡃᏑᅾࡋ࡚࠸ࡿࠋ௒ᅇ㸪ỶỈᇦࡢᨺᑕ⬟ẚࡢศᕸ࡟ࡘ࠸࡚᪂ࡓ࡞▱ぢࢆᚓࡓࡢ࡛ሗ࿌ࡍࡿࠋ
䛆ᐇ㦂䛇㻌 Ỉ୰ࡢࣛࢪ࣒࢘ᨺᑕ⬟ẚࡢ ᐃ࡟࠶ࡓࡗ࡚ࡣ㸪࣐ࣥ࢞ࣥ⧄⥔㸦⣙ 20g㸧ࢆỈ୰࡟ 2 ᫬
㛫㹼3 ᫬㛫ᨺ⨨ࡋ Ra ࢆ྾╔ࡉࡏࡓヨᩱࢆ౑ࡗࡓࠋ᏷㐨†࡛ࡣ 20 ᆅⅬࡢୖᒙỈ㸦Ỉ῝ 1㹫㸧㸪ୗᒙỈ㸦†ᗏ࠿ࡽ 0.5㹫ୖ㸧࠿ࡽࡑࢀࡒࢀヨᩱࢆ᥇ྲྀࡋࡓࠋ224Ra ࡢศᯒࡣ㸪ᅇ཰ᚋ 2 ᪥௨ෆ࡛㐜ᘏᘧྠ᫬ィ ⿦⨨㸦RaDeCC㸧ࢆ౑ࡗ࡚ 1.5 ᫬㛫ࡢ ᐃࢆ⾜ࡗࡓࠋࡉࡽ࡟ 228Th ࡢᐤ୚ࢆྲྀࡾ㝖ࡃࡓࡵ࡟ྠヨᩱࢆ 1 ࣨ᭶ᚋ࡟ ᐃࡋ㸪224Ra ࡢࡳࡢ⃰ᗘࢆồࡵࡓࠋ228Ra ⃰ᗘࡣ㸪224Ra
ࡢ୍㐃ࡢ ᐃࡀ඲࡚⤊஢ࡋࡓᚋ㸪஝⇱࣭⅊໬ࡉࡏ㸪⢊యヨᩱ࡜ࡋ࡚ U9 ⟶࡟ 1 ࣨ᭶ᐦ㛢ࡋࡓ࠶࡜࡛Ț⥺ࢆ ᐃࡋࡓࠋࡲࡓ㸪ᮏ◊✲࡛ࡣ†Ỉ࡬ࡢࣛࢪ࣒࢘ࡢ௜ຍᵝᘧࢆ᳨ウࡍࡿࡓࡵ㸪ࣛࢪ࣒࢘ᨺᑕ⬟ẚࡢኚ໬ࢆỈ῝ 1㹼3㹫ࡈ࡜࡟ ᐃࡋࡓࠋㄪᰝᆅࡣ㸪᏷㐨†㸪୰ᾏ㸪ቃỈ㐨㸪⨾ಖ‴ࡢ 4 ᆅⅬ࡛⾜ࡗࡓࠋ ᏷㐨†ྛᆅⅬ࡛ࡢ ᐃ⤖ᯝ࡟ࡼࡿ࡜㸪ࣛࢪ࣒࢘ᨺᑕ⬟ẚࡣ㸪࡯࡜ࢇ࡝ࡢᆅⅬ࡛ୗᒙỈࡢ࡯࠺ࡀపࡃ㸪ୖᒙỈࡀ㧗࠸್࡟࡞ࡗࡓࠋࡲࡓ㸪ୖᒙỈ࡛ࡣ㸪ἢᓊࡸᩫఀᕝἙཱྀᇦ࡛㸪0.30㹼0.48
࡜㧗࠸್ࢆ♧ࡋ㸪†ᚰࡸ᏷㐨†኱ᶫ࡟ྥ࠿࠺ᆅⅬ࡛ࡣ 0.19㹼0.20 ࡜ప࠸್࡟࡞ࡗࡓࠋ ࡇࡢ⤖ᯝ࠿ࡽᔂቯᐃᩘ࡟ᇶ࡙࠸࡚᪥ᩘ࡟᥮⟬ࡍࡿ࡜㸪ୖᒙỈࡣ㸪†ᚰ࡛⣙ 17 ᪥㸪す㒊࡛
12 ᪥㸪ᮾ㒊࡛ 14 ᪥࠿ࡅ࡚ὶືࡋ࡚࠸ࡿࡇ࡜࡟࡞ࡿࠋୗᒙỈࡢࣛࢪ࣒࢘ᨺᑕ⬟ẚࡣ㸪ㄗᕪ್ࡀ኱ࡁࡃ㸪ᔂቯࡀ㐍ࢇ࡛࠸ࡿࠋࡇࡢࡇ࡜ࡣ㸪ୗᒙỈࡢὶືࡀᑡ࡞࠸ࡇ࡜ࢆ♧၀ࡋ࡚࠸ࡿࠋỈ῝࡜ࣛࢪ࣒࢘ᨺᑕ⬟ẚࡢ㛵ಀࢆࡳࡿ࡜㸪Ỉ῝ࡀ῝ࡃ࡞ࡿ࡯࡝ẚࡀపࡃ࡞ࡗ࡚࠸ࡃഴྥࢆ
♧ࡋ࡚࠸ࡿࠋࡇࡢࡇ࡜࠿ࡽ㸪ἢᓊ࡟࠶ࡿ◁ࡀ࠿ࡁΰࡐࡽࢀࡿࡼ࠺࡞⌧㇟࡟ࡼࡗ࡚㸪ୖᒙỈ࡟ࣛࢪ࣒࢘ࡀ௜ຍࡉࢀ࡚࠸ࡃࡶࡢ࡜᥎ ࡛ࡁࡿࠋ㸰ࡘࡢ⤖ᯝ࠿ࡽ᏷㐨†ࡢ†ỈࡢὶືࡣୖᒙỈ࡜ୗᒙỈู࡛ࡢὶືࢆࡋ࡚࠾ࡾ㸪†Ỉࡢࣛࢪ࣒࢘௜ຍࡣ࠾ࡶ࡟ἢᓊ࡛⾜ࢃࢀ㸪୍⯡ⓗ࡟ࡣ†ᗏࡢ࣊ࢻࣟ࠿ࡽࡢ௜ຍࡣᑡ࡞࠸ࡇ࡜ࡀศ࠿ࡗ
ࡓࠋ Moore,W.S., Blanton,J.O., Joye,S.B., 2006, Estimates of flushing times, submarine groundwater
discharge, and nutrient fluxes to Okatee Estuary, South Carolina. Jour. Geophy. Res., vol. 111, C09006

224

Ra/228Ra ratios in coastal lagoon and the water dyanamics in Lakes Nakaumi and Shinjiko
NOMURA, R., INOUE, M., KOFUJI, H.

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228

P40

Ra/226Ra ẚ࠿ࡽࡳࡓᑐ㤿ᬮὶࡢᚠ⎔ࣃࢱ࣮ࣥ

(㔠ἑ኱ LLRL1ࠊ୰ኸỈ◊ 2ࠊᮾி㎰኱ 3)‫⃝ྂۑ‬భ୍ 1ࠊᇛ㇂ຬ㝎 1ࠊ஭ୖ╬ኵ 1ࠊྜྷ⏣ᆂభ 1ࠊ⸨ᮏ㈼ 2ࠊⓙᕝᫀᖾ 2ࠊሷᮏ᫂ᘯ 3ࠊ㛗ᑿㄔஓ 1ࠊᒣᮏᨻ൤ 1ࠊ὾ᓥ㟹඾ 1ࠊᑠ⸨ஂẎ 1ᮾࢩࢼᾏ኱㝣ഃࡢὸ࠸኱㝣Ჴ࠾ࡼࡧἢᓊሁ✚≀ࡼࡾᾏỈ࡟౪⤥ࡉࢀࡿࣛࢪ࣒࢘ྠ఩యࡣࠊᮾࢩ
ࢼᾏࢆ㏻㐣ࡋ᪥ᮏᾏ࡟ࡶࡓࡽࡉࢀࡓᚋࠊᑐ㤿ᬮὶ࡜࡜ࡶ࡟ᚠ⎔ࡍࡿࠋᙜ◊✲ᐊ࡛ࡣࠊࡇࢀࡲ࡛▷༙ῶᮇ (5.75 ᖺ) ࡢ 228Ra ⃰ᗘ (228Ra/226Ra ẚ) ࢆ฼⏝ࡍࡿࡇ࡜࡟ࡼࡾࠊ᪥ᮏᾏࡢᾏỈᚠ⎔ࢆㄪᰝࡋ࡚ࡁࡓࠋᮏ◊✲࡛ࡣࠊ2009-2013 ᖺࡢ 7 ᭶ࡢ⵬㮚୸ㄪᰝ⯟ᾏ ⥺ (SY09, 10, 12, 13) (Fig. 1) ࡟࠾࠸࡚᥇ྲྀࡉࢀࡓ᪥ᮏᾏ⾲ᒙᾏỈࡢ 228Ra ⃰ᗘ࠾ࡼࡧ 228Ra/226Ra ẚࡢỈᖹศᕸࢆࠊపࣂࢵࢡࢢࣛ࢘

ࣥࢻ!⥺ ᐃ࡟ࡼࡾồࡵࡓࠋ⥺ SY12 (2012 ᖺ 7 ᭶) ࡢo228
Ra ⃰ᗘ࠾ࡼࡧ 228Ra/226Ra
ᐃ⤖ᯝࢆ Fig. 2 ࡟♧ࡍࠋ໭⦋㹼39 N ࡛ࠊẚࡀ᫂ࡽ࠿࡟㧗ࡃ࡞ࡗࡓࠋ228Ra ࡟ᐩࡴ኱㝣ഃὸᒙᾏỈࡢᐤ୚ࡀ኱ࡁ࠸ࡇ࡜ࢆ♧၀ࡍࡿࠋᑐ㤿ᾏᓙすỈ㐨ࢆ㏻㐣ࡋࡓᚋ㡑ᅜ༙ᓥ࡟ἢࡗ࡚໭ୖࡋࡓᑐ㤿ᬮὶἈྜศᯞࡢᙳ㡪ࡀ⪃࠼ࡽࢀࡿࠋࡉࡽ࡟໭
ୖࡍࡿ࡜ࠊSY09ࠊSY13 ࡢ᪥ᮏᾏഃ࡛ࡣࠊ228Ra ⃰ᗘ࠾ࡼࡧ 228Ra/226Ra ẚ࡜ࡶ࡟ࠊSY12 ࡢἈྜศᯞ
࡜ࡑࡢἢᓊᇦࡢ㛫ࡢ್ࢆ♧ࡋࡓࠋ2 ࡘࡢỈሢࡢΰྜࡀ⪃࠼ࡽࢀࡿࠋ
ࡉࡽ࡟ 2014 ᖺ 7 ᭶ࡢㄪᰝ⯟ᾏ࡟࠾࠸࡚ࡶࠊ኱࿴ሁ㹼᪂₲ἢᓊ㹼኱࿴ᾏ┅ࡢヨᩱࢆ᥇ྲྀࡋࡓ (SY14) (Fig. 1)ࠋࡇࡢ⤖ᯝࡼࡾࠊSY12⥺࡛⾲ᒙᾏỈ 27⥺௨ᮾࡢᾏᇦ࡟࠾ࡅࡿἈྜศᯞ࡜ἢᓊศ

ᯞࡢᚠ⎔࠾ࡼࡧࡑࡢΰྜ࣓࢝ࢽࢬ࣒࡟㛵ࡍࡿ㆟ㄽࢆ㏣ຍࡍࡿணᐃ࡛࠶ࡿࠋࡑࡢ࠺࠼࡛ࠊ228Ra ⃰ᗘࠊ
Ra/226Ra ẚ࠾ࡼࡧሷศࡼࡾࠊ᪥ᮏᾏ࡟࠾ࡅࡿᑐ㤿ᬮὶࡢᚠ⎔ࣃࢱ࣮ࣥࡢゎᯒࢆヨࡳࡿࠋ

SY10(2010)

36

228

38

SY14
(2014)

B

2

Ra/226Ra

SY12(2012)

40

SY09(2009)

33.5
1.5

0
128

130

132

134

136

138

140

142

144

33

1
0.5

34

34

SalinityA

42

Ra (mBq/L)

44

Latitude2.5

SY13(2013)

46

228

228

32.5

B

A

s52 F s51 s50 s49 s48 s47 E s46 D s45 s44 s43 s42 s41 s40

32

Longitude

Fig. 1 (left): Sampling locations for surface waters of transects SY09–14
Fig. 2 (right): Lateral profiles of 228Ra activity, 228Ra/226Ra ratio, and salinity in surface waters ontransect SY12.
ㅰ㎡㸸ᾏỈ᥇ྲྀ࡟ࡈ༠ຊ࠸ࡓࡔ࠸ࡓࠊ⵬㮚୸ࡢྠ஌◊✲⪅ࠊ⯪㛗࠾ࡼࡧ஌⤌ဨࡢⓙᵝ࡟ឤㅰ࠸ࡓ
ࡋࡲࡍࠋ
Migration pattern of the Tsushima Warm Current; Implication from 228Ra/226Ra ratio
FURUSAWA, Y., SHIROTANI, Y., INOUE, M., YOSHIDA, K., FUJIMOTO, K., MINAKAWA, M.,
SHIOMOTO, A., NAGAO, S., YAMAMOTO, M., HAMAJIMA, Y., KOFUJI, H.

- 156 -

P41

$06 ࡟ࡼࡿప⃰ᗘ࣒࣋ࣜࣜ࢘ ཬࡧ࢔࣑ࣝࢽ࣒࢘

ᐃࡢࡓࡵࡢヨ⸆➼ࡢ㑅ᐃཎᏊຊᶵᵓ ࠊ࣌ࢫࢥ  ‫ۑ‬ᅧศ 㰻⸨ 㝧Ꮚ ࠊᯇཎ❶ᾈ ࠊ⸨⏣ዉὠᏊ ࠊすᑿᬛ༤ ࠊ኱⬥ዲኵ ࠊ┾⏣຾ᶞ ࠊす⃝❶ග ࠊ୕Ꮿṇᜤ 㻹㼑㼞㼏㼗㻌㻵㻯㻼㻹㼑㼞㼏㼗㻌㻭㻭㻿ሗ࿌ࡍࡿࠋ㛵ᮾ໬Ꮫ㻭㻭㻿

࿴ග⣧⸆㻭㻭㻿

Ratio of 10Be/9Be䛆⥴ゝ䛇㻌Ᏹᐂ⥺↷ᑕᖺ௦ ᐃἲ࡟ࡼࡿᒾయࡢ㟢ฟᖺ௦ࡸ౵㣗㏿ᗘࡢ᥎ᐃࢆ┠ⓗ࡜ࡋ࡚ࠊ࣒࣋ࣜࣜ࢘
-10㸦10Be㸧ཬࡧ࢔࣑ࣝࢽ࣒࢘-26㸦26Al㸧ࡀຍ㏿ჾ㉁㔞ศᯒἲ㸦AMS㸧࡛ ᐃࡉࢀࡿࠋ㏆ᖺࠊࡇࢀࡽࡢ᰾✀ࡢ῝ᗘศᕸࢆ ᐃࡋࠊࡑࡢศᕸ࠿ࡽ㧗࠸⢭ᗘ࡛ࡢᖺ௦್ࢆồࡵࡽࢀ࡚ࡁ࡚࠸ࡿ
㸦e.g. Shiroya, 2009㸧ࠋࡇࡢࡼ࠺࡞ᖺ௦ ᐃࡢࡓࡵ࡟ࡣࠊపࣞ࣋ࣝࡢ 10Be ཬࡧ 26Al ࡢ ᐃࡀᚲせ࡛࠶ࡾࠊヨᩱࡢ๓ฎ⌮࠿ࡽ ᐃࡲ࡛ࡢ㐣⛬࡛ࣂࢵࢡࢢࣛ࢘ࣥࢻࡢཎᅉ࡜࡞ࡿせ⣲ࢆ᳨ウࡋࠊపῶᑐ⟇ࢆ⾜࠺ᚲせࡀ࠶ࡿࠋᮏ◊✲࡛ࡣࠊ ᐃࡢࡳࡢࣈࣛࣥࢡホ౯⏝ヨ⸆ࡸヨᩱㄪ〇࡟⏝࠸ࡿヨ⸆୰ࡢ 10Be ཬࡧ 26Al ࢆ ᐃࡋࠊ㐺ษ࡞ヨ⸆ࡢ㑅ᐃࢆヨࡳࡓࡢ࡛ࠊࡑࡢ⤖ᯝࢆሗ࿌ࡍࡿࠋ䛆ᐇ㦂䛇㻌
AMS ࡛ 10Be ཬࡧ 26Al ࢆ ᐃࡍࡿ㝿ࡢヨᩱࡣࠊ࡜ࡶ࡟㓟໬≀࡛࠶ࡿࡓࡵࠊ ᐃࡢࡳࡢࣈࣛࣥࢡホ౯⏝ヨ⸆࡜ࡋ࡚ᕷ㈍ࡢ㓟໬≀⢊ᮎヨ⸆ࡀ฼⏝ྍ⬟࡛࠶ࡿࠋࡑࡇ࡛ࠊ✀ࠎࡢᕷ㈍㓟໬࣒࣋ࣜࣜ࢘ཬࡧ㓟໬࢔࣑ࣝࢽ࣒࢘⢊ᮎࡢྠ఩యẚࢆ ᐃࡋࠊヨ⸆㛫ࡢẚ㍑ࢆ⾜ࡗࡓࠋࡲࡓࠊ
ᐃヨᩱࢆస〇ࡍࡿ㝿࡟⏝࠸ࡿ࢟ࣕࣜ࢔ཬࡧࣉࣟࢭࢫࣈࣛࣥࢡࡢホ౯࡟⏝࠸ࡿ Be ཬࡧ Al ཎᏊ྾ගศᯒ㸦AAS㸧⏝ࡲࡓࡣㄏᑟ⤖ྜࣉࣛࢬ࣐Ⓨගศගཬࡧ㉁㔞ศᯒ㸦ICP㸧⏝ᶆ‽⁐ᾮ࡟ࡘ࠸࡚ࡶㄪ࡭ࡓࠋᶆ‽⁐ᾮࡣࠊᩘ༑ ml ࢆ▼ⱥࣅ࣮࣮࢝࡟ධࢀࠊ࣍ࢵࢺࣉ࣮ࣞࢺୖ࡛⵨Ⓨ஝ᅛࡋࡓᚋࠊ㟁Ꮚࣞࣥࢪ⏝ࡿࡘࡰ࡟ධࢀࠊ㟁Ꮚࣞࣥࢪ 500W ࡛ 15 ศຍ⇕ࡍࡿࡇ࡜࡟ࡼࡾ↝⤖ࡉࡏ㓟໬≀࡜ࡋࡓࠋ ᐃࡣࠊཎᏊຊᶵᵓᮾ⃰ᆅ⛉Ꮫࢭࣥࢱ࣮ࡢ JAEA-AMS-TONO ࡛⾜ࡗࡓࠋ䛆⤖ᯝ䛸⪃ᐹ䛇㻌㓟໬࣒࣋ࣜࣜ࢘ヨ⸆࡜ࡋ࡚ࠊ࿴ග⣧⸆〇ཬࡧ୕ὠ࿴໬Ꮫ〇ࡢ 2 ✀㢮ࢆẚ㍑ࡋࡓࠋ10Be/9Beẚࡣࠊ10-15㹼10-14 ࡛ࣞ࣋ࣝ࠶ࡾࠊ࿴ග⣧⸆〇ࡼࡾ୕ὠ࿴໬Ꮫ〇ࡢ᪉ࡀప࠸್ࢆ♧ࡋࡓࠋࡲࡓࠊ
࢟ࣕࣜ࢔➼࡜ࡋ࡚⏝࠸ࡿᶆ‽⁐ᾮࡣ 4 ✀㢮ࢆẚ㍑ࡋ
ࡓࠋᅗ࡟ࡑࢀࡒࢀࢆ 7 ಶࡎࡘ ᐃࡋࡓ⤖ᯝࡢᖹᆒ್
ࢆ♧ࡍࠋMerck 〇ࡢࡶࡢࡣࠊ࿴ග⣧⸆〇ཬࡧ㛵ᮾ໬Ꮫ〇࡟ẚ࡭ࠊ༙ศ⛬ᗘྠ఩యẚࡀప࠿ࡗࡓࠋࡲࡓࠊ
-14
1x10
Merck 〇ࡢ AAS ⏝࡜ ICP ⏝࡛ࡣࠊᕪࡀ࡞࠿ࡗࡓࠋࡇ
ࢀࡣࠊ࣓࣮࣮࢝࡟ࡼࡿཎᩱࡢ㐪࠸ࢆ཯ᫎࡋ࡚࠾ࡾࠊ
ྠࡌ࣓࣮࣮࢝ෆ࡛ࡣࠊྠ୍ࡢཎᩱࢆ⏝࠸࡚࠸ࡿ࡜ᛮ
ࢃࢀࡿࠋࡇࡢࡼ࠺࡞ 10Be/9Be ẚࡀప࠸ヨ⸆ࢆ⏝࠸ࡿ
1x10-15ࡇ࡜࡟ࡼࡾࠊపࣂࢵࢡࢢࣛ࢘ࣥࢻ ᐃࡀྍ⬟࡜࡞ࡾࠊࡉࡽ࡟㧗⢭ᗘࡢᖺ௦ ᐃࡀᮇᚅ࡛ࡁࡿࠋ
Ⓨ⾲࡛ࡣࠊྠᵝ࡟᳨ウࡋࡓ Al ヨ⸆ࡢ⤖ᯝ࡟ࡘ࠸࡚ࡶᅗ ྛᶆ‽⁐ᾮ୰ࡢ 10Be/9Be ẚ

Shiroya et al., Geochemical J. 44, 23 (2010).

Selection of regents for measurement of low concentrations of 10Be and 26Al by AMS
SAITO-KOKUBU, Y., MATSUBARA, A., FUJITA, N., NISHIO, T., OHWAKI, Y., SANADA, K.,NISHIZAWA, A., MIYAKE, M.

- 157 -

- 158 -P43▼ᕝ▼࠿ࡽ⁐ฟࡍࡿࢺ࣒ࣜ࢘࠾ࡼࡧࣛࢪ࣒࢘ࡢྠ఩యࡢᨺᑕ⬟ᙉᗘẚ᫂኱㝔⌮ᕤ 1ࠊ᫂኱◊✲࣭▱㈈ᡓ␎ᶵᵓ 2ࠊ᫂኱⌮ᕤ 3ࠊᮾ኱㝔 4)‫ۑ‬ᑠᯇཎ೺ኴ 1ࠊᰩཎ㞝୍ 2ࠊሷཎⰋᘓ 3ࠊ㔝ᮧ㈗⨾ 4ࠊ୰ᮧ฼ᘅ 3ࠊᑠụ⿱ஓ 3䛆⥴ゝ䛇㻌㻌 㻌 ࡇࢀࡲ࡛࡟ࠊᨺᑕᛶ㖔≀ࡢࣔࢼࢬ▼ (Ce, La, Nd, Th) PO4 ཬࡧ࣮ࣘࢡࢭࣥ▼ (Y, Ca, Ce, U,Th) (Nb, Ta, Ti)2O6 ࡸⰼᓵᒾ࡜ᵝࠎ࡞ pH ࡢ㓟⁐ᾮ࡜ࢆ᥋ゐࡉࡏࡓ⁐ฟᐇ㦂࡟࠾࠸࡚ࠊ㓟⁐ᾮࡢ pH ࡢኚ໬࡟క࠸ Th ཬࡧ Ra ྠ఩య㛫 (232Th, 230Th, 228Th ཬࡧ 228Ra, 226Ra, 224Ra) ࡛⁐ฟᣲືࡀ␗࡞ࡿࡇ࡜ࡀሗ࿌ࡉࢀ࡚࠸ࡿ 1-3)ࠋTh ཬࡧ Ra ྠ఩య㛫࡛ࡣࠊࡼࡾከࡃࡢቯኚࢆ⤒࡚⏕ᡂࡉࢀࡓ᰾✀ࡢ᪉ࡀ⁐ฟࡉࢀ᫆࠸ഴྥࢆ♧ࡋ࡚࠸ࡿࠋࡋ࠿ࡋࠊ࣮ࣘࢡࢭࣥ▼ࡢ⁐ฟᐇ㦂࡟
࠾ࡅࡿ 232Th ࡜ 230Th ࡜ࡢ㛫 ཬࡧ 228Ra ࡜ 226Ra ࡜ࡢ㛫ࡢ⁐ฟᣲືࡣ␗࡞ࡿᣲືࢆ♧ࡍ 2)ࠋ
ࡇࡢྠ఩య㛫 (232Th ࡜ 230Th ཬࡧ 228Ra ࡜ 226Ra) ࡢ⁐ฟᣲືࡢᕪ␗ࡀ࣮ࣘࢡࢭࣥ▼ᅛ᭷ࡢ⌧㇟࡛࠶ࡿࡢ࠿ࢆㄪ࡭ࡿࡓࡵࠊྠࡌ࢘ࣛࣥ㖔≀࡛࠶ࡿ▼ᕝ▼ (Y, Fe, U, Ca)(Nb, Ta)O4 ࢆ⏝࠸࡚ྠᵝࡢ⁐ฟᐇ㦂ࢆ⾜࠸ࠊ⁐ฟᾮ୰ࡢ Th ཬࡧ Ra ࡢྠ఩యࡢᨺᑕ⬟ᙉᗘẚࢆほ ࡋࡓࠋ䛆ᐇ㦂䛇㻌㻌 㻌 ᐇ㦂࡟ࡣ⚟ᓥ┴▼ᕝ⏫࡛᥇ྲྀࡉࢀࡓヨᩱࢆ⏝࠸ࡓࠋ⁐ฟᐇ㦂ࡣࠊpH ࢆ 0, 1, 2 ࡟ㄪᩚࡋࡓ
ሷ㓟ཬࡧ◪㓟⁐ᾮ࡜⢊ᮎ࡟ࡋࡓศᯒヨᩱ࡜ࢆ 25Υ࡛ 15 ᪥㛫᥋ゐࡉࡏ࡚⾜ࡗࡓࠋྛ⁐ฟᾮ୰ࡢ Th ࡢྠ఩యࡢᨺᑕ⬟ᙉᗘẚࡣ α ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺࣜ࡟ࡼࡾࠊRa ࡢྠ఩యࡢᨺᑕ⬟ᙉᗘẚࡣ γ ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺࣜ࡟ࡼࡾ ᐃࡋࡓࠋ㻌䛆⤖ᯝཬ䜃⪃ᐹ䛇㻌㻌 㻌 ྛ⁐ฟᾮࡢ pH ࡟ᑐ ࡍ ࡿ 228Th/232Th
ཬࡧ 224Ra/228Ra ࡢᨺᑕ⬟ᙉᗘẚࠊ230
Th/232Th ཬ ࡧ
226
Ra/228Ra ࡢᨺᑕ⬟ᙉᗘẚࢆ Fig. 1, 2࡟ࡑࢀࡒࢀ♧ࡍࠋ
Fig. 1 228Th/232Th and 224Ra/228Ra activity Fig. 2 230Th/232Th and 226Ra/228Ra activity
ratios in leachate from Ishikawaite
ratios in leachate from Ishikawaite
Fig. 1 ࡼࡾࠊ⁐ฟᾮ
sample in HCl and HNO3 aqueous
sample in HCl and HNO3 aqueous
solutions.
solutions.
୰ࡢ 228Th/232Th ཬ- - - : 228Th/232Th and 224Ra/228Ra activity - - - : 230Th/232Th and 226Ra/228Ra activityࡧ 224Ra/228Ra ࡢᨺ
ratios in the sample (1.0).
ratios in the sample (50).
ᑕ⬟ᙉᗘẚࡣࠊ㖔≀୰ࡢ್ (1.0) ࡼࡾ㧗࠸್ࢆ♧ࡋࠊ⁐ฟᾮࡢ pH ࡢ್ࡀ㧗ࡃ࡞ࡿ࡟ࡘࢀ࡚኱ࡁࡃ࡞ࡿഴྥࡀぢ࡚ྲྀࢀࡿࠋࡇࢀࡣࠊፉ᰾✀ࡀ⏕ᡂࡉࢀࡿࡲ࡛ࡢቯኚᒚṔ࡟㉳ᅉࡍࡿࡶࡢ࡜⪃࠼ࡽࢀࡿ 1, 3)ࠋFig.
2 ࡼࡾࠊ⁐ฟᾮ୰ࡢ 230Th/232Th ཬࡧ 226Ra/228Ra ࡢᨺᑕ⬟ᙉᗘẚࡣࠊ㖔≀୰ࡢ್ (50) ࡼࡾᑠࡉ࠸್ࢆ♧ࡋࠊ⁐ฟᾮࡢ pH ࡢ್ࡀ㧗ࡃ࡞ࡿ࡟ࡘࢀ࡚ᑠࡉࡃ࡞ࡿഴྥࡀぢ࡚ྲྀࢀࡿࠋ
(230Th/232Th ᨺᑕ⬟ᙉᗘẚ࡟㛵ࡋ࡚ࡣ࣮ࣘࢡࢭࣥ▼࡜ྠᵝࡢഴྥ)2)ࠋࡇࢀࡽࡢྠ఩య㛫ࡢ⁐ฟᣲືࡢᕪ␗ࡣࠊ㖔≀୰࡟ྵࡲࢀࡿ U ཬࡧ Th ࡢ๭ྜ࡟㉳ᅉࡋ࡚࠸ࡿࡢ࠿ࡶࡋࢀ࡞࠸ࠋ
䛆ཧ⪃ᩥ⊩䛇㻌
1) K. Nagai, E. Hashimoto and J. Sato: Radioisotopes, 56, 567 (2006)
2) K. Nagai, Y. Kurihara and J. Sato: Radioisotopes, 56, 719 (2007)
3) K. Nagai, M. Takahashi and J. Sato: Radioisotopes, 56, 811 (2007)
Activity ratios of thorium and radium isotopes leached from ishikawaite
KOMATSUBARA, K., KURIHARA, Y., SHIOBARA, R., NOMURA, K., NAKAMURA, T., KOIKE, Y..

- 159 -

ᆅ⾲௜㏆ࡢ኱Ẽ୰ࡢ 7Be, 10Be ⃰ᗘࡢኚື

P44㸦᪥኱㝔⥲ྜᇶ 1ࠊ᪥኱ᩥ⌮ 2ࠊᮾ኱༤≀㤋 3㸧‫ۑ‬బ⸨ᬕ⣖ 1ࠊ㎷⏣୍ᶞ 1ࠊᒣᙧṊ㟹 2ࠊỌ஭ᑦ⏕ 2ࠊᯇᓮᾈஅ 3

10Be/ 7Be

(㽢104atoms/m3)

10Be concentration(㽢104atoms/m3)

7Be concentration࠙⥴ゝࠚ7Be(T1/2=53.29d), 10Be(T1/2=1.36×106y)ࡣ஧ḟᏱᐂ⥺ࡢ୰ᛶᏊ࡜኱Ẽ୰ࡢ 14N, 16O ࡢ᰾཯ᛂ࡟ࡼࡾ⏕ᡂࡋ, ⣙ 2/3 ࡀᡂᒙᅪ, ⣙ 1/3 ࡀᑐὶᅪ࡛⏕ᡂࡍࡿࠋ7Be, 10Be ࡣ⏕ᡂᚋ㓟໬ࡉࢀ࡚࢚࢔ࣟࢰࣝ࡟྾╔ࡋ኱Ẽ୰ࢆ⛣ືࡍࡿࠋ࢚࢔ࣟࢰࣝࡢᖹᆒ⁫␃᫬㛫ࡣᡂᒙᅪ࡛ 1-2 ᖺ, ᑐὶᅪ࡛ 10-30 ᪥࡛࠶ࡿ࡜⪃࠼ࡽࢀ࡚࠾ࡾ, ᡂᒙᅪ࡛ࡣᑐὶᅪ࡟ẚ࡭ 7Be, 10Be ࡢ⏕ᡂ㏿ᗘࡀ኱ࡁࡃ
࢚࢔ࣟࢰࣝࡢ⁫␃᫬㛫ࡀ㛗࠸ࡓࡵ 7Be, 10Be ⃰ᗘࡀ㧗ࡃ, ࡲࡓ 7Be ࡀ㣬࿴≧ែ࡜࡞ࡿࡓࡵ,10
Be/7Be ࡶ㧗ࡃ࡞ࡿࠋ໭༙⌫࡛ࡣ᫓Ꮨ࡟ᡂᒙᅪ-ᑐὶᅪ஺᥮(STE)ࡀ㉳ࡇࡾᆅ⾲௜㏆࡟ᡂᒙᅪ኱
Ẽࡢ✵Ẽሢࡀὶධࡍࡿࡓࡵ 7Be, 10Be ⃰ᗘ࡜ 10Be/7Be ࡀ㧗ࡃ࡞ࡿᏘ⠇ኚືࢆ♧ࡍࠋᮏ◊✲࡛ࡣ,ᆅ⾲௜㏆ࡢ኱Ẽ୰ࡢ 7Be, 10Be ⃰ᗘࡢᐃⅬほ ࢆ⾜࠸ 2002-2012 ᖺ࡟࠾ࡅࡿ୰ᛶᏊࣇࣛࢵࢡࢫ
࡜ࡢኚືࢆẚ㍑ࡋ, Ᏹᐂ⥺ᙉᗘ࡜ࡢ㛵ಀ࡟ࡘ࠸᳨࡚ウࢆ⾜ࡗࡓࠋ࠙ᐇ㦂ࠚᮾி㒔ୡ⏣㇂༊࡟࠾࠸࡚ࣁ࢖࣮࣒࢚࣎ࣜࣗ࢔࣮ࢧࣥࣉ࣮ࣛ(AS-810, ⣖ᮏ㟁Ꮚᕤᴗ㸦ᰴ㸧)ࢆ⏝࠸࡚኱Ẽ୰ࡢ࢚࢔ࣟࢰࣝࢆ࣮࣌ࣃ࣮ࣇ࢕ࣝࢱ࣮(Whatman 41, 20.3cm25.4cm)࡟᥇
ྲྀࡋࡓࠋ᥇ྲྀᮇ㛫ࡣ⣙ 1 㐌㛫࡛✚⟬ὶ㔞ࡣ⣙ 2000~6000m3 ࡛࠶ࡿࠋࣇ࢕ࣝࢱ࣮ࡣ!⥺ ᐃ࡟ࡼ
ࡾ 7Be(E!=477.6keV)ࢆᐃ㔞ࡋࡓᚋ, 1/4 ࢆศྲྀࡋ Be ᢸయ⣙ 0.5mg, 1M HNO3 ࢆຍ࠼⁐ゎࡋ, 㝧࢖࢜ࣥ஺᥮࡟ࡼࡾ Be ࢆศ㞳ࡋࡓࠋBe ࢆ Be(OH)2 ࡜ࡋỿẊὙίࢆ⾜ࡗࡓᚋ BeO ࡟ኚ᥮ࡋ, ᮾி኱Ꮫ MALT ࡟࠾࠸࡚ 10Be ࡢ AMS ᐃࢆ⾜ࡗࡓࠋ࠙⤖ᯝࠚ7Be, 10Be ⃰ᗘࡣ, ẖᖺ 3-6 ᭶࡜ 10-11 ᭶㡭࡟㧗ࡃ, 7-8 ᭶㡭࡟పࡃ࡞ࡿᏘ⠇ኚືࢆ♧ࡋ,10
Be/7Be ࡣ 3-6 ᭶㡭࡟㧗ࡃ࡞ࡿᏘ⠇ኚືࢆ♧ࡋࡓࠋࡇࡢኚືࡣ, 3-6 ᭶ࡣ STE, 7-8 ᭶࠾ࡼࡧ 10-11᭶ࡣᑐὶᅪෆࡢ㖄┤ΰྜࡢኚ໬࡟ࡼࡿᙳ㡪࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋḟ࡟, Ᏹᐂ⥺ᙉᗘ࡜ࡢẚ㍑
ࢆ⾜ࡗࡓࠋࡇࡇ࡛, 2002-2012 ᖺ࡟ࢹ࢙ࣛ࢘࢔ᕞ(໭⦋ 39.7°す⤒ 75.7°㧗ᗘ⣙ 50m)[1]࡛ほ ࡉࢀࡓ୰ᛶᏊࣇࣛࢵࢡࢫࡢᖺ㛫ᖹᆒ್ࡢ┦4.5
ᑐኚື࡟ẚ౛ࡍࡿࡼ࠺࡟ 7Be, 10Be ࡢ⏕ᡂ(a)4.0㏿ᗘࢆኚືࡉࡏ, ᡂᒙᅪ࡜ᑐὶᅪࢆ࣎ࢵ
3.5
ࢡࢫ࡜ࡋࡓ 2 ࣎ࢵࢡࢫࣔࢹࣝ࡟ࡼࡾ 7Be,
3.0
10Be ࡢᑐὶᅪ࠿ࡽᆅ⾲࡬ࡢࣇࣛࢵࢡࢫ
7Be(Neutron)
observed
Fout(T)("S = 1y)
⣔ิ1
⣔ิ3
⣔ิ2
2.5
(Fout(T))ࢆ⟬ฟࡋࡓࠋィ⟬࡛ࡣᑐὶᅪ࡟࠾ࡅ
⣔ิ4⣔ิ5
Fout(T)("S = 2y)
Fout(T)("S = 3y)9.0
2.0ࡿ⁫␃᫬㛫("T)ࢆ"T=21d ࡜ࡋࡓࠋࡲࡓ, 7Be(b)8.0ࡣᡂᒙᅪ࡟࠾ࡅࡿ⁫␃᫬㛫("S)ࡀ"SӍ1y ࡢ
7.0࡜ࡁ㣬࿴≧ែ࡜࡞ࡿ࡜ࡋ, 10Be ࡛ࡣ"S=1, 2,
6.0
3y ࡜ࡋ࡚, ࡑࢀࡒࢀ Fout(T)ࡢᖺ㛫ᖹᆒ್ࢆ
5.0⟬ฟࡋࡓࠋࡇࢀࢆᆅ⾲௜㏆ࡢ኱Ẽ୰⃰ᗘ
4.0
3.0
2.5
ࡢ┦ᑐ್࡜ࡋ, ほ ್࡜ẚ㍑ࡋ࡚ᅗ 1 ࡟
10
10
7
(c)
♧ࡍࠋ Be ⃰ᗘ(b)࠾ࡼࡧ Be/ Be(c)࡟ࡘ
2.0
࠸࡚, "S = 2y ࡢ࡜ࡁࡢ Fout(T)ࡀほ ್࡜㏆࠸್࡜࡞ࡗࡓࡓࡵ, ᐇ㝿ࡢ"S ࡣ 2 ᖺ⛬ᗘ࡛
1.5࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋࡲࡓ, 7Be ⃰ᗘ(a), 10Be
1.0 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
⃰ᗘ(b)ࡢほ ್࡜ィ⟬್ࡣඹ࡟ 2009 ᖺ࡟
yearᴟ኱࡜࡞ࡿኚືࢆ♧ࡋࡓࡇ࡜ࡀࢃ࠿ࡗࡓࠋ
ᅗ1 ᮾி㒔࡟࠾ࡅࡿ2002-2012ᖺࡢ኱Ẽ୰ࡢ 7Be⃰ᗘ(a),࠙ཧ⪃ᩥ⊩ࠚ
10Be⃰ᗘ(b)࠾ࡼࡧ 10Be/7Be(c)࡜ ࣎ࢵࢡࢫࣔࢹࣝ࡟ࡼࡾ
[1]Cosmic ray data for National Geophysical⟬ฟࡋࡓ 7Be⃰ᗘ(a), 10Be⃰ᗘ(b)࠾ࡼࡧ 10Be/7Be(c)ࡢ┦ᑐ
Data Center (NGDC) in Boulder, CO, USA,್(Fout(T))ࡢᖺ㛫ᖹᆒ್ࠋFout(T)ࡣᡂᒙᅪࡢ⁫␃᫬㛫 "S = 1,2, 3y࡜ࡋࡓ࡜ࡁࡢᑐὶᅪ࠿ࡽࡢ㝆ୗࣇࣛࢵࢡࢫ࡛࠶ࡾ
http://www.ngdc.noaa.gov/ngdc.html
ᆅ⾲௜㏆ࡢ⃰ᗘࡢ┦ᑐ್࡜ࡋ࡚♧ࡋࡓࠋ

Variation of Be and Be concentrations in the atmosphere near the Earth's surface.
SATO, H., TSUJITA, K., YAMAGATA, T., NAGAI, H., MATSUZAKI, H.,
710- 160 -

P45

ᮾࢩࢼᾏ㹼᪥ᮏᾏ⾲ᒙ࡟࠾ࡅࡿ 228Th/228Ra ẚࡢỈᖹศᕸ㸦㔠ἑ኱ LLRL1ࠊྡྂᒇ኱Ỉᚠ⎔ࢭ 2ࠊỈ኱ᰯ 3ࠊ୰ኸỈ◊ 4㸧‫ۑ‬ᇛ㇂ຬ㝎 1ࠊྂ⃝భ୍ 1ࠊ஭ୖ╬ኵ 1ࠊ㛗ᑿㄔஓ 1ࠊᒣᮏᨻ൤ 1ࠊ὾ᓥ㟹඾ 1ࠊୖᮧᐂ㍤ 1ࠊᑠ
⸨ஂẎ 1ࠊ᳃ᮏ᫂ᙪ 2ࠊ⁪ᕝဴኴ㑻 3ࠊ⸨ᮏ㈼ 4ᾏὒ⎔ቃ࡟࠾࠸࡚⢏Ꮚ྾╔ᛶ࡛࠶ࡿ 228Th ࡣࢫ࢟ࣕ࣋ࣥࢪࣥࢢ࡟ࡼࡾࠊぶ᰾✀ࡢ⁐Ꮡ 228Ra
࡟ẚ࡭ඃඛⓗ࡟ᾏỈ⾲ᒙࡼࡾ㝖ཤࡉࢀࡿࠋࡑࢀࡺ࠼ࠊ228Th/228Ra ẚࡣ⢏Ꮚ྾╔ᛶඖ⣲ (ᡂศ) ࡉࡽ࡟ࡣ⢏Ꮚࡢᣲືࢆ᥈ࡿᣦᶆ࡜࡞ࡿࠋᮾࢩࢼᾏ⾲ᒙ࡟࠾࠸࡚ࡶࠊ㯮₻ᾏỈ࡛ 228Th/228Ra ẚࡀ㧗ࡃࠊ኱㝣ഃὸᒙᾏỈ࡛ 228Th/228Ra ẚࡀప࠸ (ࢫ࢟ࣕ࣋ࣥࢪࣥࢢࡢᐤ୚ࡀ኱ࡁ࠸)ࠊ࡜࠸࠺Ỉሢ࡟ࡼࡿ㢧ⴭ࡞㐪࠸ࡀ☜ㄆࡉࢀ࡚࠸ࡿ (Inoue et al., 2012)ࠋࡋ࠿ࡋ᪥ᮏᾏ⾲ᒙ࡟࠾ࡅࡿ⢏Ꮚ྾╔ᛶ᰾✀ࡢᣲືࡣࠊ᫂ࡽ࠿࡟࡞ࡗ࡚࠸࡞࠸ࠋᮏ◊✲࡛ࡣࠊ2009-2013 ᖺࡢ 7-10 ᭶࡟ᮾࢩࢼᾏ
㹼᪥ᮏᾏ࡛᥇ྲྀࡋࡓ⾲ᒙᾏỈࡢ 228Raࠊ226Raࠊ228Th ⃰ᗘࢆᑿᑠᒇᆅୗ ᐃᐊࢆ฼⏝ࡋࡓపࣂࢵ
ࢡࢢࣛ࢘ࣥࢻ࣐࢞ࣥ⥺ ᐃἲ࡟ࡼࡾồࡵࠊ228Th/228Ra ẚࠊ228Ra/226Ra ẚࡢỈᖹศᕸࢆㄪ࡭ࡓࠋ
ࡑࡢ⤖ᯝࡼࡾㄪᰝᾏᇦࡢ≀㉁ᚠ⎔ࢆ㆟ㄽࡍࡿࠋFig. 1: Sampling locations for surface waters.
⾲ᒙᾏỈ᥇ྲྀᆅⅬࢆ Fig. 1 ࡟♧ࡍࠋ⌧ᅾࡢ࡜ࡇࢁࠊᮾࢩࢼᾏ⾲ᒙ࡟࠾࠸࡚ࡣ 228Th/228Ra ẚ࡟኱ࡁ࡞ኚືࡀࡳࡽࢀ࡚࠸ࡿ (< 0.05-0.7)ࠋᑐ㤿ᾏᓙ࠾ࡼࡧ᪥ᮏᾏ࡟࠾࠸࡚ࡣ 228Th/228Ra ẚࡀపࡃኚ໬ࡀᑠࡉ࠸ഴྥ (< 0.05-0.3) ࢆ♧ࡍ࡞࡝ࠊᾏᇦ࡟࠾ࡅࡿ㐪࠸ࡀ᫂ࡽ࠿࡟࡞ࡾࡘࡘ࠶ࡿࠋ
௒ᚋࠊヨᩱᩘࢆቑࡸࡍࡇ࡜࡟ࡼࡾࠊᮏᖺ఍࡛ࡣࠊᮾࢩࢼᾏᮾ㒊࠾ࡼࡧ᪥ᮏᾏ⾲ᒙ࡟࠾ࡅࡿỈሢ࡟㛵ࡍࡿ᝟ሗ (౛࠼ࡤ 228Ra ࡟ᐩࡴὸᒙᾏỈࡢ๭ྜ) ࢆ 228Ra/226Ra ẚ࠿ࡽᚓࡓ࠺࠼࡛ࠊྛỈሢࡢ 228Th ࡢࢫ࢟ࣕ࣋ࣥࢪࣥࢢ࡟㛵ࡋ࡚ 228Th/228Ra ẚࡼࡾ㆟ㄽࡍࡿணᐃ࡛࠶ࡿࠋ
ㅰ㎡㸸ᾏỈ᥇ྲྀ࡟ࡈ༠ຊ࠸ࡓࡔ࠸ࡓࠊ⵬㮚୸ࠊ࠾ࡋࡻࢁ୸ࠊኳ㮚୸ࠊῐ㟷୸ࡢྠ஌◊✲⪅ࠊ⯪㛗࠾ࡼࡧ஌⤌ဨࡢⓙᵝ࡟ឤㅰ࠸ࡓࡋࡲࡍࠋ
ᩥ⊩㸸Inoue et al. (2012) Geochem. J. 46, 429-441.
Lateral profile of 228Th/228Ra ratio in seawater from the East China Sea and the Sea of JapanSHIROTANI, Y. FURUSAWA, Y. INOUE, M. NAGAO, S. YAMAMOTO, M. HAMAJIMA, Y.
UEMURA, H. KOFUJI, H. MORIMOTO, A. TAKIKAWA, T. FUJIMOTO, K.

- 161 -

P46!"!#$%&'()*+,-./01234 Be-7, Be-10 -56!!!"!"# $%&'() *%+',-./0 1%2'345 6789:;# $%<=>? *%@ABC $%:D3( 1%EFGH 6%IJKL *!

!"#$7Be(T1/2=53.3 %), 10Be(T1/2=1.36&106 ')()*+,-./0/1234567!8 14N, 16O 9:;<=>?@?9+A-BCDE1FBCGHIDEJKLMNOPQ+RSTJUVW+AXY,!"#$%&'!()*+,-./012#&3456789:;"9<="#>?@AB# [1]$789'!C& 7Be(5DEFG!HI>JKCL#MNOP&3QRS#9TBU#VCUPR$10Be (78!EWXYZ[
Fig.1 Sampling station-\]<=0^#$_`aE(Fbcbde8-5
D7f! 7Be, 10Be -$g0hPFiBjB-klmn
o0pqCF10Be -rstu0v#w>0%x>C&$yz{|78`a}~`a KH-12-4
7(Fig.1)9PUFBD04-17(6-800m)E)f
9fB&7f0>CUP&$9
U7f 250L 9 250mL >>CU Be 2mg, Fe
2g 0CFf90Z F7Be,
10
Be 0¡¢C0z{£9¤¥¦§&$¨©ªq
Fig.2 Vertical profile of 7Be and 10Be
9 Fe 0«¬CFi-¨­0®C0Z CF
concentrations¯°0hP±C&$E¨²C&³
2.5mL %E®Cγ´$g9 7Be(Eγ=477.6keV)-g0h§&$γ´$g³µ¶·¸¹9 Be-º»¼½0hP¾¿ÀÁÂÁ!EÃ~ÄÅCFwB0 850M9ÆCU BeO >C&$Ç½ÂÈÁÉ
9Ê3UËÌ)ÍÎÏÐÑÒÓÔÕÖ9PU 10Be -Ô×<Ø0h§&$yÙÚÛ?Ü|7Be, 10Be - 350m %E-\]<=0 Fig.2 9ÝC&$7Be (G!HI>JKCUL#M
NOP&3 100m ÞQE(ßàCUáâCUPSP$100m %E(ãäåäx9#VCUFfæ>çåNè§&$5D 7Be -<=( BD04 > BD15 0«PUécEêRFËcE"P<=>S§&$wB(bcbde8écE('fNëRF%&Dì>íîì-)*¸¹Nïð9hñBUP#[2]>?@ABUFi-./N5D- 7Be ò9./0óôCUP#>?@AB#$10Be -\]<=( 100m õò%Eö>ð÷"g-òEáâCUFiBÞQE(øù9òNúCUP§&$Be (WXûüýNêRFþÏÿln!-"#S÷9ûüC'"#>?@ABUP#$iw
En$$k%& a -ò>JK"#>Fn$$k%& a -òN'#CUP# 100m ()E 10Be òNúCUP#$wB( 100m ÞQEn$$k%& a -òN*'9#VCUFZÏZ+9#«¬Ôò-úNSRS#>?@AB#$y,- - - ?.#|[1] /012, 3456,- 789:, ;<=Z, Ëcbde8-7f!->!´Z"# 7Be, 10Be -<=, $_)Í.&Íc%&'Í`a()`a*+,- 40 .(2005) [2] Michio

Aoyama,- Katsumi Hirose, Yasuhiro igaarashi, J.environ. monit., 2006, 8, 431-438
Distribution of cosmogenic 7Be and 10Be in the northern north Pacific
MASUDA, Y.,YAMAGATA, T.,HASEGAWA, A.,TAZOE,H.,MATSUZAKI, H.,NAGAI, H.

- 162 -

P47

Ᏹᐂ⥺⾲㠃↷ᑕᖺ௦ࡢ⁐ゎ᪉ἲࡢ᳨ウᐃࡢࡓࡵࡢ࣐ࢢࢿࢱ࢖ࢺヨᩱࡢࢩࣗ࢘㓟⁐ᾮ࡬㧗䜶䝛◊ᨺᑕ⥺䝉 䠈⟃Ἴ኱ᩘ⌮≀㉁ 䠈⟃Ἴ኱ຍ 䠈8& 䝞䞊䜽䝺䞊Ᏹᐂ⛉Ꮫ◊ 䕿ᯇᮧ㻌 ᏹ 䠈ᮎᮌၨ௓ 䠈ᯇᮧ୓ᑑ⨾ 䠈➲㻌 බ࿴ 䠈すἨ㑥ᙪ 䛆⥴ゝ䛇㻌 ຍ㏿ჾ㉁㔞ศᯒἲ䠄AMS䠅䛾Ⓨᒎ䛻క䛔䠈஧ḟᏱᐂ⥺䛻䜘䜚ᆅ⾲䛾ᒾ▼୰䛻⏕ᡂ䛩䜛
Be䠈26Al䠈36Cl 䛺䛹䛾㛗༙ῶᮇᨺᑕᛶ᰾✀䠄AMS ᰾✀䠅䜢ᐃ㔞䛩䜛Ᏹᐂ⥺↷ᑕᖺ௦ ᐃἲ䛜䠈ᆅ

10ᙧᏛ➼䛾◊✲䛻౑䜟䜜䜛䜘䛖䛻䛺䛳䛯䚹䛣䛾Ᏹᐂ⥺↷ᑕᖺ௦ ᐃἲ䛷䛿䠈▼ⱥ୰䛾 10Be 䛸 26Al 䜢ᐃ㔞䛩䜛ᡭἲ䛜୺䛷䛒䜛䛜䠈ᡃ䚻䛿䝬䜾䝛䝍䜲䝖୰䛾 AMS ᰾✀䛾ᐃ㔞䜢᪂ᡭἲ䛾ೃ⿵䛸䛧䛶╔┠䛧䛯䚹
AMS 䛷ศᯒྍ⬟䛺᰾✀䛸䛧䛶 10Be䠈26Al䠈36Cl䠈41Ca䠈53Mn 䛜ೃ⿵䛸䛧䛶ᣲ䛢䜙䜜䠈ከ✀䛾༙ῶᮇ䛾᰾✀䜢฼⏝䛷䛝䜛Ⅼ䛷䛿▼ⱥ䜘䜚䜒ඃ䜜䛶䛔䜛䚹ᡃ䚻䛿䠈䛣䜜䜎䛷䛻䝏䝸䞉䜰䝍䜹䝬◁₍䛛䜙᥇ྲྀ䛧䛯⋞Ṋᒾ䛛䜙ศ㞳䛧䛯䝬䜾䝛䝍䜲䝖୰䛾 10Be ཬ䜃 36Cl 䜢ᐃ㔞䛧䠈Ᏹᐂ⥺↷ᑕᖺ௦䜢ồ䜑䠈ᮏᡭἲ䛜᭷ຠ䛷䛒䜛䛣䛸䜢☜ㄆ䛧䛯[1]䚹䛣䛾ᐇ㦂䛻䛚䛔䛶䠈䝬䜾䝛䝍䜲䝖ヨᩱ䜢⁐ゎ䛩䜛䛯䜑䛻䝅䝳䜴㓟䞉䝅䝳䜴㓟䜰䞁䝰䝙䜴䝮⁐ᾮ䜢౑⏝䛧䛯䛜䠈ᚲせ⁐ᾮ㔞䛜ከ䛔䠈⁐ゎ᫬㛫䛜㛗䛔➼䛾ỗ⏝໬䛻䛿ᨵၿ䜢せ䛩䜛Ⅼ䛜䛒䛳䛯䚹ᮏⓎ⾲䛷䛿䠈⁐ᾮ㔞䠈䝅䝳䜴㓟㔞䠈⁐ゎ㐺໬䜢⾜䛳䛯䛾䛷ሗ࿌䛩䜛䚹ᗘ䠈⁐ゎ᫬㛫䜢᳨ウ䛧䠈⁐ゎ᪉ἲ䛾᭱
100㞼⏫➉ᓮ䠈㫽ୖ⩚ෆ㇂㖔ᒣ䠈⢏ᗘ䠖0.1䡚0.5mm ⛬ᗘ䠅90䜢䝍䞁䜾䝇䝔䞁ங㖊䛷㍍䛟⢊○ᚋ䠈୙⣧㖔≀䜢㝖䛟䛯䜑

80ഒ
(႒)

䛆ᐇ㦂䛇㻌 ᕷ㈍䛾䝬䜾䝛䝍䜲䝖䠄⏘ฟ䠖ᓥ᰿┴ோከ㒆ዟฟ䛻ධ䜜䛶䠈ᬯୗ䛷ᜏຍ⇕᣺䛸䛖䛧䛯䚹᣺䛸䛖ᚋ䠈⁐䛡ṧ䛳䛯䝬䜾䝛䝍䜲䝖䜢⛗㔞䛧䛶⁐ゎ⋡䜢ᚓ䛯䚹᣺䛸䛖୰䛻⏕ᡂ䛧䛯㯤ⰍỿẊ䛿ศ䛡䛶Ὑί䞉஝⇱䛧䠈⛗㔞䛧䛯䚹

80

70

70
65ഒ ഒ(Ⴠ)
(Ⴎ)
60ഒ
(
Ⴃ)
55ഒ
(Ⴘ)

䜹䝸Ὑίᚋ䛻䠈䝅䝳䜴㓟஧Ỉ࿴≀ཬ䜃Ỉ䛸୍⥴䛻䝫䝸⎼☢㕲㖔ࡢ⁐ゎ⋡(%)

䛻䝬䜾䝛䝍䜲䝖䜢☢ຊ㑅㖔䛧䛯䚹䝬䜾䝛䝍䜲䝖䜢䠈㓟䞉䜰䝹45ഒ(႑㓟䞉䝅䝳䜴㓟䜰䞁䝰䝙䜴䝮⁐ᾮ䛸䝅䝳䜴㓟⁐ᾮ䛷䛿኱䛝)䛆⤖ᯝ䛸⪃ᐹ䛇㻌 䝬䜾䝛䝍䜲䝖⁐ゎ㏿ᗘ䛻䛴䛔䛶䠈䝅䝳䜴60䛺ᕪ䛜ぢ䜙䜜䛺䛛䛳䛯䚹䜘䛳䛶䠈䝅䝳䜴㓟䜰䞁䝰䝙䜴䝮↓ῧຍ䛷௨㝆䛾໬Ꮫศ㞳᧯స䜢༢⣧໬䛷䛝䜛䚹䝬䜾䝛䝍䜲䝖 1g 䛻ᑐ䛧䛶䝅䝳䜴㓟஧Ỉ࿴≀⣙ 5g 䛷䜋䜌᏶඲䛻⁐ゎ䛷䛝䜛䛣䛸䛜䜟䛛䛳䛯䚹䜎䛯䠈ᗘ䛜㧗䛔䜋䛹⁐ゎ㏿

ᗘ䛜㏿䛟䛺䜚᭷฼䛷䛒䜛䠄ᅗ 1 ཧ↷䠅䛜䠈⁐ゎ୰䛻ỿẊ䛩䜛䝅䝳䜴㓟㕲(II)஧Ỉ࿴≀䛜 60䉝䜢ቃ䛻ቑຍ䛧䠈⏕

50
0.2

0.4

1

2

4

10

20

40

᣺࡜࠺᫬㛫㸦᪥㸧

ᅗ 1 䝬䜾䝛䝍䜲䝖 1g 䛾 5g 䝅䝳䜴㓟஧Ỉ࿴≀Ỉ⁐ᾮ 15mL 䜈䛾⁐ゎ⋡䛾᫬㛫ኚ໬ᡂ㏿ᗘ䛸ỿẊ⏕ᡂ䛾チᐜ䜢⪃៖䛧䛶䠈70䉝䛷 6 ᪥㛫⁐ゎ䛩䜛䛾䛜᭱㐺䛷䛒䜛䛸⤖ㄽ௜䛡䛯䚹᭱㐺໬䛻䜘䜚䠈⁐ゎᾮ㔞䠈⁐ゎ᫬㛫䠈ヨ⸆✀㢮䞉ᩘ㔞䛾᮲௳䛜๓ᐇ㦂[1]䜘䜚኱ᖜ䛻ᨵၿ䛧䛯䚹[1]ᯇᮧᏹ䜙䠈䛂ᆅ⾲ᒾ▼୰䛾䝬䜾䝛䝍䜲䝖䛻䛚䛡䜛Ᏹᐂ⥺⏕ᡂ㛗༙ῶᮇᨺᑕᛶ᰾✀䛃䠈᪥ᮏᆅ⌫໬Ꮫ఍ᖺ఍ (2009)

An optimization of magnetite dissolution method using oxalic acid for cosmogenic nuclide exposure
age dating
MATSUMURA, H., SUEKI, K., MATSUMURA, M., SASA, K., NISHIIZUMI, K.

- 163 -

P48

㧗㏿୰ᛶᏊ↷ᑕࡢ཯㊴ຠᯝࢆ฼⏝ࡋࡓ Sr-85 ࢆෆໟࡋࡓ
㔠ᒓࣇ࣮ࣛࣞࣥࡢ⏕ᡂ࡟㛵ࡍࡿ◊✲(㤳㒔኱㝔⌮ᕤ1㸪JAEA 㔞Ꮚࣅ࣮࣒ᛂ⏝2)‫ۑ‬ᐑୗ⏤㤶1ࠊ⛅ᒣ࿴ᙪ1ࠊึᕝ㞝୍2ࠊྈ஭ᬛᾈ1ࠊ༓ⴥ࿴႐1ࠊబ⸨♸ኴ1ࠊஂ෠ᮌᚿ㑻1࠙⥴ゝࠚ㧗࠸ẚᨺᑕ⬟ࢆᣢࡘᨺᑕᛶ㔠ᒓෆໟࣇ࣮ࣛࣞࣥࢆᚓࡿࡓࡵࠊࡇࢀࡲ࡛࡟᰾཯ᛂࡢ཯㊴ຠᯝࢆ฼⏝ࡋࡓከࡃࡢᐇ㦂ࡀ⾜ࢃࢀ࡚ࡁࡓࠋࡋ࠿ࡋࠊࣉࣟࢺࣥ࡞࡝ࡢ᰾཯ᛂࢆ⏝࠸ࡓሙྜ࡟ࡣࠊC60
࡞࡝ࡢᶆⓗࣇ࣮ࣛࣞࣥศᏊ࡬ࡢᨺᑕ⥺ᦆയࡀ↓ど࡛ࡁ࡞࠸ࡓࡵࠊࡑࢀࡽࡢ⏕ᡂ⋡ࡣᴟࡵ࡚ᑠࡉ࠸
ࡇ࡜ࡀ▱ࡽࢀ࡚࠸ࡿ[1]ࠋ୍᪉ࠊ㟁Ⲵࢆᣢࡓ࡞࠸㧗㏿୰ᛶᏊ࡛ࡣࠊ┤᥋ࣇ࣮ࣛࣞࣥࢣ࣮ࢪࢆᵓᡂࡍ
ࡿⅣ⣲ཎᏊ᰾࡟⾪✺ࡋࡓ㝿ࡢᦆയࡢࡳࢆ⪃៖ࡍࢀࡤࡼࡃࠊࡼࡾຠ⋡ⓗ࡟ᨺᑕᛶ㔠ᒓෆໟࣇ࣮ࣛࣞ
ࣥࡢ⏕ᡂࡀ࡛ࡁࡿ࡜⪃࠼ࡽࢀࡿࠋࡑࡇ࡛ᡃࠎࡣࠊ14 MeV ࡢ㧗㏿୰ᛶᏊ࡟ࡼࡿ 86Sr (n, 2n) 85Sr ཯ᛂࡢ཯㊴ຠᯝࢆ⏝࠸࡚ 85Sr@C60 ࡢ⏕ᡂࢆヨࡳࡓࠋᮏ◊✲࡛ࡣࠊᶆⓗ࡜ࡍࡿࢫࢺࣟࣥࢳ࣒࢘ሷ࡜ࡋ࡚
ࡑࢀࡒࢀᐦᗘࡢ␗࡞ࡿ Sr(NO3)2 (2.99 g/cm3)࡜ SrC2O4 (2.08 g/cm3)ࢆ⏝࠸ࠊ85Sr@C60 ࡢ⏕ᡂ⋡ࢆホ౯ࡋࡓࠋ࠙ᐇ㦂ࠚSr(NO3)2 (A)࠾ࡼࡧ SrC2O4 (B)࡜ C60 ࡢΰྜ≀ࢆ࣏࢚ࣜࢳࣞࣥࣂ࢖࢔ࣝ࡟ᑒධࡋࠊ᪥ᮏཎᏊ
ຊ◊✲㛤Ⓨᶵᵓࡢ᰾⼥ྜ୰ᛶᏊ※(FNS)࡟࡚ 3H ࡢ㔜㝧Ꮚ᰾཯ᛂ(D-T ཯ᛂ)࡛⏕ࡌࡿ 14 MeV ࡢ㧗㏿୰ᛶᏊࢆ↷ᑕࡋࡓࠋࡑࡢᚋࠊ↷ᑕヨᩱࢆ CS2ࠊ࢔ࢽࣜࣥࠊỈ࠾ࡼࡧ HClaq ࡢ㡰࡛ᢳฟࢆ⾜࠸ࠊࡑࢀࡒࢀࡢ⁐ᾮࢆ࣓ࣥࣈࣞࣥࣇ࢕ࣝࢱ࣮࡛ࢁ㐣ࡋ࡚ࠊᨺᑕ⬟ᐃ⏝ࡢヨᩱ࡜ࡋࡓࠋᨺᑕ⬟ᢳฟ⁐ᾮ୰࡟Ꮡᅾࡍࡿ 85Sr ࡀᨺฟࡍࡿ 514 keV ࡢ!⥺ࢆ Ge ༙ᑟయ᳨ฟჾ࡟ࡼࡾ

ᐃࡣࠊྛ

ᐃࡋࡓࠋ

࠙⤖ᯝ࣭⪃ᐹࠚ୍⯡ⓗ࡟ࠊC60 ࢆྵࡴ✵ࡢࣇ࣮ࣛࣞࣥࡣ CS2 ࡟ᢳฟࡉࢀࡿࡀࠊSr@C60 ࡣ࢔ࢽࣜࣥ
୰࡟ᢳฟࡉࢀࡿࡇ࡜ࡀ▱ࡽࢀ࡚࠸ࡿ[2]ࠋ⾲ࡣࠊA ཬࡧ B ࡢྛᢳฟ⁐ᾮࠊࣇ࢕ࣝࢱ࣮ୖࡢṧ´ࡢィᩘ⋡࡜ࡑࡢ๭ྜࢆ♧ࡋ࡚࠸ࡿࠋ࢔ࢽࣜࣥ⁐ᾮ୰࠿ࡽほࡉࢀࡓ 85Sr ࡢ๭ྜࡣ A ࡛ࡣ 0.1%ᮍ‶࡛࠶ࡗࡓࡀࠊB ࡛ࡣ⣙ 0.75%࡛࠶ࡾࠊ᭷ព࡞ᕪࡀࡳࡽࢀࡓࠋࡇࢀࡽࡢ⤖ᯝࡣࠊ㧗㏿୰ᛶᏊ↷ᑕࡢᶆⓗ࡜ࡋ࡚ SrC2O4 ࢆ⏝࠸ࡓ㝿ࠊࡼࡾຠ⋡ⓗ࡟ 85Sr㸾C60 ࡀ⏕ᡂࡉࢀࡓࡇ࡜ࢆ♧၀ࡋ࡚࠸ࡿࠋࡲࡓࠊSEM
࡟ࡼࡿᶆⓗࢫࢺࣟࣥࢳ࣒࢘ሷࡢほ⤖ᯝ࠿ࡽ SrC2O4 ࡢ⤖ᬗࢧ࢖ࢬࡣ࡯ࡰ
ᆒ୍࡛࠶ࡾ⢏ᚄࡣ⣙ 1 "m ⛬ᗘ࡛࠶ࡿ⾲㸸ྛᢳฟ⁐ᾮࠊࣇ࢕ࣝࢱ࣮ୖࡢṧ´ࡢィᩘ⋡࡜๭ྜࢧࣥࣉࣝࡇ࡜ࡀࢃ࠿ࡗࡓࠋ୍᪉࡛ࠊSr(NO3)2Aͤ ィᩘ⋡㸦cps㸧

Bͤ ィᩘ⋡㸦cps㸧/ ๭ྜ㸦%㸧/ ๭ྜ㸦%㸧࡛ࡣ 1-50 "m ⛬ᗘ࡜ᗈ࠸⢏ᚄศᕸࢆ

CS2

᳨ฟ㝈⏺௨ୗ

᳨ฟ㝈⏺௨ୗ

ࡶࡘࡇ࡜ࡀ☜ㄆࡉࢀࡓࠋࡇࡢࡇ࡜࠿ࡽࠊ

࢔ࢽࣜࣥ

0.00352 / 0.0959

0.00730 / 0.751

SrC2O4 ࡀᐦᗘࡢᑠࡉ࠸ᆒ୍࡞ᑠ⢏ᚄ

Ỉ / HClaq

3.65 / 99.3

0.570 / 58.6

ࡢ⤖ᬗ࡛࠶ࡿࡇ࡜ࡀ 85Sr@C60 ࡢ⏕ᡂࣇ࢕ࣝࢱ࣮

0.0208 / 0.567

0.395 / 40.6

⋡ୖ᪼࡟ᙳ㡪ࢆཬࡰࡋࡓࡢ࡛ࡣ࡞࠸

ィ

3.67 / 100

0.973 / 100࠿࡜⪃࠼ࡽࢀࡿࠋ

ͤA: Sr(NO3)2ࠊB: SrC2O4[1] Ohtsuki, T. et al., J. Chem. Phys., 112, 2834(2000).
[2] Kubozono, Y. et al., Chem. Lett., 25, 453(1996).
Synthesis of endohedral Sr-85 metallofullerene by nuclear recoil using high energy neutron
MIYASHITA, Y., AKIYAMA, K., HATHUKAWA, Y., CHIBA, K., TADAI, T., SATO, Y., KUBUKI,
S..

- 164 -

P49⌮◊ $9) ࢧ࢖ࢡࣟࢺࣟࣥࢆ⏝࠸ࡓ㡺ᕸ⏝ 5, ࡢㄪ〇Ϩ &G⌮◊ோ⛉ࢭ ࠊ࢔࢖ࢯࢺ࣮ࣉ༠఍  ⬥㇂㞝୍㑻 ࠊ▮⣡ៅஓ ࠊ
ᒣ⏣ᓫ⿱ ࠊ⩚ሙᏹග ࠊ‫ۑ‬ᰘ⏣ㄔ୍ ࠊ㧗ᶫ࿴ஓ 䛆⥴ゝ䛇 ⌮◊ோ⛉ຍ㏿ჾ◊✲ࢭࣥࢱ࣮࡛ࡣ᪥ᮏ࢔࢖ࢯࢺ࣮ࣉ༠఍࡜ඹྠ࡛ࠊຍ㏿ჾᢏ⾡ࡢ⏘ᴗᛂ⏝ࢆ㏻ࡌࡓ♫఍㈉⊩࡟㈨ࡍࡿ஦ᴗࡢ୍⎔࡜ࡋ࡚ࠊ2007 ᖺࡼࡾ AVF ࢧ࢖ࢡࣟࢺࣟࣥࢆ⏝࠸ࡓ
RI ࡢ〇㐀ཬࡧࡑࡢ᭷ൾ㡺ᕸࢆ⾜ࡗ࡚࠸ࡿࠋࡇࢀࡲ࡛ 65Zn㸦༙ῶᮇ㸸244.3 d㸧ࠊ109Cd㸦༙ῶᮇ㸸
462.6 d㸧
ࠊ88Y㸦༙ῶᮇ㸸106.6 d㸧ࡢ㡺ᕸᐇ⦼ࡀ࠶ࡾࠊ⣼ィ㡺ᕸ௳ᩘࡣ 100 ௳ࢆ㉸࠼࡚࠸ࡿࠋ
109
Cd ࡟ࡘ࠸࡚ࡣࠊ109Ag(d,2n)109Cd ཯ᛂ࡟ࡼࡗ࡚〇㐀ࡋ࡚ࡁࡓࡀࠊ↷ᑕࡋࡓ Ag ࢱ࣮ࢤࢵࢺ
࠿ࡽࡢ 109Cd ࡢ໬Ꮫศ㞳࣭⢭〇ἲ࡜ࡋ࡚ AgCl ỿẊἲࢆ⏝࠸࡚࠸ࡓࡓࡵ࡟ࠊ109Cd ࡀࡇࡢỿẊ࡜ඹỿࡋࠊ໬Ꮫ཰⋡ࡀ⣙ 75%࡜ࠊࡑࡢᦆኻࡀᑠࡉࡃ࡞࠸࡜࠸࠺ၥ㢟ࡀ࠶ࡗࡓ[1, 2]ࠋࡑࡇ࡛ᮏ◊✲࡛ࡣࠊAg ࡢศ㞳࡟ HBr ࢆ⏝࠸ࡓ㝜࢖࢜ࣥ஺᥮ἲ[3, 4]ࢆ᥇⏝ࡋࠊ໬Ꮫ཰⋡ࡢྥୖ࡟ࡘ࠸᳨࡚ウࡋࡓࠋ
Ag (1.1 g)䛆ᐇ㦂䛇 109Cd ࡣࠊ109Ag(d,2n)109Cd ཯ᛂ࡟ࡼࡾࠊ㔜㝧Ꮚ࢚ࢿࣝࢠ࣮24 MeVࠊࣅ࣮࣒ᙉᗘ
c. HNO3 5 mL, H2O 5 mL,
9 μAࠊ↷ᑕ᫬㛫 37 ᫬㛫࡛〇㐀ࡋࡓࠋAg ࢱ
H2O2 3 drops࣮ࢤࢵࢺ࡟ࡣࠊኳ↛ྠ఩య⤌ᡂࡢ Ag ᯈ㸦⣧heat to dryness
ᗘ 99.99%௨ୖࠊ┤ᚄ 15 mmࠊཌࡉ 0.6 mm㸧
c. HBr 10 mL
ࢆ⏝࠸ࡓࠋ
↷ᑕᚋࠊ
Ag ࢱ࣮ࢤࢵࢺࢆ c. HNO3࡛⁐ゎࡋࠊ⵨Ⓨ஝ᅛᚋࠊc. HBr ࡛⁐ゎࡋࠊ heat to dryness
⵨Ⓨ஝ᅛࡋࡓࠋᚓࡽࢀࡓṧ´ࢆ 7 M HBr ࡛
7 M HBr 90 mL⁐ ゎ ࡋ ࠊ 㝜 ࢖ ࢜ ࣥ ஺ ᥮ ἲ 㸦 Dowex 1X8,
7 M HBr 10 mL㽢4
100-200 mesh㸧࡟ࡼࡾ Ag ࢆ㝖ࡁࠊḟ࠸࡛ࠊ๪⏕ᡂ≀ࡢ 65Zn ࢆ 0.02 M HCl ࡛⁐㞳ࡋࠊ᭱
0.02 M HCl 5 mL㽢6⤊ⓗ࡟ 109Cd ࡣ 3 M HNO3 ࡛⁐㞳ࡋࡓࠋᅗ 1
3 M HNO3 2 mL㽢3࡟໬Ꮫศ㞳ࢫ࣮࣒࢟ࢆ♧ࡍࠋ109Cd ࡢᨺᑕ⬟H2O 5 mLཬࡧᨺᑕᛶ᰾✀⣧ᗘࡣࠊGe ᳨ฟჾࢆ⏝࠸ࡓȚࢫ࣌ࢡࢺ࣓ࣟࢺࣜ࡟ࡼࡾỴᐃࡋࡓࠋ
Dowex 1㽢8, 100–200 mesh,䛆⤖ᯝ䛸⪃ᐹ䛇 ௒ᅇࡢ HBr ࢆ⏝࠸ࡓ㝜࢖࢜
7.0
mm i.d.㽢40 mm heightࣥ஺᥮ἲ࡟ࡼࡾ 109Cd ࡢ໬Ꮫ཰⋡ࢆᚑ᮶ࡢ⣙ 75%࠿ࡽ 98%࡬࡜ྥୖࡉࡏࡿࡇ࡜ࡀ࡛ࡁ
ࡓࠋᨺᑕᛶ᰾✀⣧ᗘࡣࠊᚑ᮶〇ရ࡜ྠ⛬ᗘ  
65Zn
109Cd
Ag
㸦>99%㸧࡛࠶ࡗࡓࠋウㄽ఍࡛ࡣࠊICP-MS
ᅗ 1. 109Cd ࡢ໬Ꮫศ㞳ࢫ࣮࣒࢟㸬࡟ࡼࡿ໬Ꮫ⣧ᗘࡸẚᨺᑕ⬟ࡢ⤖ᯝ࡟ࡘ࠸࡚
ࡶሗ࿌ࡍࡿࠋ      䛆ཧ⪃ᩥ⊩䛇
[1] ⬥㇂௚ࠊ➨ 48 ᅇ࢔࢖ࢯࢺ࣮ࣉ࣭ᨺᑕ⥺◊✲Ⓨ⾲఍せ᪨㞟(2011) 25.
[2] ⬥㇂௚ࠊ➨ 49 ᅇ࢔࢖ࢯࢺ࣮ࣉ࣭ᨺᑕ⥺◊✲Ⓨ⾲఍せ᪨㞟(2012) 21.
[3] F. W. E. Strelow et al., Anal. Chem. 40 (1968) 2021.
[4] M. K. Das et al., 3rd International Conference on Application of Radiotracers and Energetic Beams
in Sciences (ARCEBS-14), Jan. 2014, Kolkata, India.
Preparation of 109Cd for the fee-based distribution at the RIKEN AVF cyclotron
WAKITANI, Y., YANO, S., YAMADA, T., HABA, H., SHIBATA, S., TAKAHASHI, K.

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P50⌮◊ $9) ࢧ࢖ࢡࣟࢺࣟࣥࢆ⏝࠸ࡓ㡺ᕸ⏝ 5, ࡢㄪ〇

ϩ 6U⌮◊ோ⛉ࢭ ࠊ࢔࢖ࢯࢺ࣮ࣉ༠఍  ▮⣡ៅஓ ࠊ⬥㇂㞝୍㑻 ࠊ
ᒣ⏣ᓫ⿱ ࠊ⩚ሙᏹග ࠊ㔠㇂῟ᖹ ࠊ‫ۑ‬ᰘ⏣ㄔ୍ ࠊ㧗ᶫ࿴ஓ 䛆⥴ゝ䛇㻌 ⌮◊ோ⛉ຍ㏿ჾ◊✲ࢭࣥࢱ࣮࡛ࡣ᪥ᮏ࢔࢖ࢯࢺ࣮ࣉ༠఍࡜ඹྠ࡛ࠊຍ㏿ჾᢏ⾡ࡢ⏘ᴗᛂ⏝ࢆ㏻ࡌࡓ♫఍㈉⊩࡟㈨ࡍࡿ஦ᴗࡢ୍⎔࡜ࡋ࡚ࠊ2007 ᖺࡼࡾ AVF ࢧ࢖ࢡࣟࢺࣟࣥࢆ⏝࠸ࡓ
RI ࡢ〇㐀ཬࡧࡑࡢ᭷ൾ㡺ᕸࢆ⾜ࡗ࡚࠸ࡿࠋ
㏆ᖺࠊ≉࡟⚟ᓥ➨୍ཎᏊຊⓎ㟁ᡤࡢ஦ᨾ௨ᚋࠊ㛗ᑑ࿨⎔ቃởᰁ᰾✀ 90Sr㸦༙ῶᮇ㸸28.9 y㸧ࡢศᯒࡸ㝖ᰁᢏ⾡ࡢ㛤Ⓨ࡟࠾࠸࡚Ț⥺ᨺฟ᰾✀ 85Sr㸦༙ῶᮇ㸸64.85 d㸧ࡀࢺ࣮ࣞࢧ࡜ࡋ࡚ࡋ
ࡤࡋࡤ⏝࠸ࡽࢀ࡚࠾ࡾࠊ≉࡟㧗ẚᨺᑕ⬟ࡢ 85Sr ࡢ㟂せࡀ㧗ࡲࡗ࡚࠸ࡿࠋࡑࡇ࡛ᮏ◊✲࡛ࡣࠊnat
Rb(d,x)85Sr ཯ᛂ࡟ࡼࡗ࡚ 85Sr ࢆ〇㐀ࡋࠊ↓ᢸయ໬Ꮫศ㞳ࢆ⾜࠺ࡇ࡜࡟ࡼࡾ㧗ẚᨺᑕ⬟ 85Sr
ࢆㄪ〇ࡍࡿࡇ࡜ࢆ᳨ウࡋࡓࠋ䛆ᐇ㦂䛇㻌 85Sr ࡣࠊnatRb(d,x)85Sr ཯ᛂ࡟ࡼࡾ㔜㝧Ꮚ࢚ࢿࣝࢠ࣮24 MeVࠊࣅ࣮࣒ᙉᗘ 3 μAࠊ↷ᑕ᫬㛫 24 ᫬㛫࡛〇㐀ࡋࡓࠋ↷ᑕࢱ࣮ࢤࢵࢺ࡟ࡣࠊኳ↛ྠ఩య⤌ᡂࡢ RbCl㸦⣧ᗘ 99.99%௨ୖࠊ┤ᚄ 15 mmࠊཌࡉ 500 mg cm-2㸧ࢆ⏝࠸ࡓࠋ↷ᑕᚋࠊRbCl ࢱ࣮ࢤࢵࢺࢆỈ࡟⁐ゎࡋ࡚◪㓟㓟ᛶ࡜
ࡋࠊ⵨Ⓨ஝ᅛࡋࡓࠋᚓࡽࢀࡓṧ´ࢆ 8 M HNO3 ࡛⁐ゎࡋࠊEichrom ♫〇 Sr resin㸦100-150 mesh㸧࡛ Rb ࡜ Sr ࢆศ㞳ࡋࠊࡉࡽ࡟ࠊ㝧࢖࢜ࣥ஺᥮ἲ㸦Dowex 50WX8, 200-400 mesh㸧࡛ Sr ࢆ⢭〇ࡋࡓࠋᅗ 1 ࡟໬Ꮫศ㞳ࢫ࣮࣒࢟ࢆ♧ࡍࠋ85Sr ࡢᨺᑕ⬟ཬࡧᨺᑕᛶ᰾✀⣧ᗘࡣࠊGe ᳨ฟჾࢆ⏝࠸ࡓȚࢫ࣌ࢡࢺ࣓ࣟࢺࣜ࡟ࡼࡾỴᐃࡋࡓࠋࡲࡓࠊẚᨺᑕ⬟ࡣ ICP-MS ࡟ࡼࡿᏳᐃྠ఩యࡢᐃ㔞࡟ࡼࡾホ౯ࡋࡓࠋ

RbCl (880 mg)
H2O : 2 mL, 8 M HNO3 : 2 mL

Heat to dryness

8 M HNO3 : 2 mL

Heat to dryness

c. HCl : 1 mL

Heat to dryness
Heat to dryness

0.1 M HCl : 2 mL
8 M HNO3 : 4 mL

8 M HNO3 : 2 mL㽢60.05 M HNO3 : 2 mL㽢4

3 M HCl : 1 mL㽢3

6 M HCl : 1 mL㽢5

Dowex 50W㽢8, 200-400 mesh; !"5 mm㽢40 mm height

Sr Resin, 100-150 mesh; !"5 mm㽢50 mm height
discarddiscard85Srᅗ 1. 85Sr ࡢ໬Ꮫศ㞳ࢫ࣮࣒࢟䛆⤖ᯝ䛸⪃ᐹ䛇㻌 ௒ᅇࡢ㔜㝧Ꮚࣅ࣮࣒↷ᑕ࡟ࡼࡿ 85Sr ࡢ〇㐀ຠ⋡ࡣࠊ
⣙ 3 MBq μA-1 h-1 ࡛࠶ࡗࡓࠋ
ࡲࡓࠊ໬Ꮫ཰⋡ࡣ 89%࡛ࠊ85Sr ࡢᨺᑕᛶ᰾✀⣧ᗘࡣ 99.9%௨ୖ࡛࠶ࡗࡓࠋICP-MS ࡢศᯒ⤖ᯝࡼࡾࠊ௒ᅇࡢ໬Ꮫศ㞳᧯స࡟࠾࠸࡚ΰධࡋࡓᏳᐃ Sr ࡣ 0.2 μg ࡜ᐃ㔞ࡉࢀࡓࠋࡇࢀࡽࡢ⤖ᯝࡼࡾࠊ᪤࡟ᕷ㈍ࡉࢀ࡚࠸ࡿ 85Sr ࡜ẚ㍑ࡋ࡚㣕㌍ⓗ࡟㧗࠸ẚᨺᑕ⬟ࢆࡶࡘ 85Sr ࡢ౪⤥ࡀྍ⬟࡜࡞ࡗࡓࠋ௒ᚋࡣࡇࡢ 85Sr ⁐ᾮࡢᨺᑕ⬟⃰ᗘ࡟ࡘ࠸࡚ᰯṇࢆ⾜࠸ࠊᨺᑕᛶᶆ‽⁐ᾮ࡜ࡋ࡚౪⤥ࡍࡿࡇ࡜ࢆ᝿ᐃࡋࡓ᳨ウࡶ㐍ࡵࡿࠋPreparation of 85Sr for the fee-based distribution at the RIKEN AVF cyclotron
YANO, S., WAKITANI, Y., YAMADA, T., HABA, H., KANAYA, J., SHIBATA, S., TAKAHASHI, K.

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P51

㌾ X ⥺↷ᑕࣆ࣑ࣜࢪࣥሷᇶࡢ୙ᑐ㟁Ꮚ཰㔞ࡢ⨨᥮ᇶ౫Ꮡᛶ
ᮾ໭኱㧗ᩍᶵᵓ ࠊᮾ໭኱㝔⌮ ࠊJAEA ඛ➃◊ ࠊᮾ໭኱⌮  ‫ۑ‬ᒸ ኖᓫ ࠊࠊᶓ㇂᫂ᚨ ࠊ⸨஭೺ኴ㑻 ࠊᮌ㔝ᗣᚿ ࠊ㛵᰿ ຮ 䛆⥴ゝ䛇㻌 ᡃࠎࡣ SPring-8 ࡢ㌾ X ⥺ࣅ࣮࣒ࣛ࢖ࣥ㸦BL23SU㸧࡟࠾࠸࡚ࠊ㌾ X ⥺↷ᑕ࡟ࡼࡗ࡚⏕ᡂࡋࡓ୙ᑐ㟁Ꮚࢆࡑࡢሙ㸦in situ㸧 ᐃ࡛ࡁࡿ ESR ⿦⨨ࢆ㛤ⓎࡋࠊDNA ᵓᡂཎᏊࡢෆẆ㟁Ꮚບ㉳ཬࡧ࢖࢜ࣥ໬ࡀࠊ✺↛ኚ␗ࡢㄏⓎࡢཎᅉ࡜࡞ࡿ DNA ࡢᦆയ⏕ᡂ࡟࡝ࡢࡼ࠺࡟ᐤ୚ࡋ࡚࠸
ࡿ࠿ࢆ᫂ࡽ࠿࡟ࡋ࡚ࡁࡓ[1-2]ࠋᮏⓎ⾲࡛ࡣࠊࣆ࣑ࣜࢪࣥሷᇶࡢⷧ⭷ヨᩱ࡟༢Ⰽ㌾ X ⥺ࢆ↷ᑕࡋࠊ❅⣲࠾ࡼࡧ㓟⣲ࡢ K Ẇ࢖࢜ࣥ໬࡟ࡼࡗ࡚⏕ࡌࡿ୙ᑐ㟁Ꮚ཰㔞ࡢ⨨᥮ᇶ౫Ꮡᛶ࡟ࡘ࠸࡚ሗ
࿌ࡍࡿࠋ㻌䛆ᐇ㦂䛇 㔠࣓ࢵ࢟ࡋࡓ↓㓟⣲㖡ࡢࣟࢵࢻ࡟┿✵⵨╔ჾ㸦㹼10-4 Pa㸧࡛⵨╔ࡋࡓ࢘ࣛࢩࣝⷧ⭷࠾ࡼࡧࡑࡢㄏᑟయ࡛࠶ࡿ 5-ࣈࣟࣔ࢘ࣛࢩࣝⷧ⭷ࢆࠊX-band ESR ⿦⨨㸦᪥ᮏ㟁Ꮚ〇ࠊJES-TE300㸧
ࡢ┿✵ᵴ୰࡟࠶ࡿ࢟ࣕࣅࢸ࢕࣮࡟ᑟධࡋࠊ㌾ X ⥺ࢆ↷ᑕࡋ࡞ࡀࡽ ESR ᐃࢆ⾜ࡗࡓࠋESR ࢟ࣕࣅࢸ࢕࣮ෆࡢ┿✵ᗘࡣ㹼10-7 Paࠊ ᐃࡣᐊ ࡛⾜ࡗࡓࠋ❅⣲࠾ࡼࡧ㓟⣲ࡢ XANES 㡿ᇦ࡛↷ᑕࡍࡿ㌾ X ⥺ࡢ࢚ࢿࣝࢠ࣮ࢆᤲᘬࡋ࡞ࡀࡽ ESR ᐃࢆ⧞ࡾ㏉ࡋ୙ᑐ㟁Ꮚ཰㔞ࡢ࢚ࢿࣝࢠ࣮౫
Ꮡᛶࢆᚓࡓࠋࡲࡓࠊࡑࢀࡒࢀࡢヨᩱࡢ XANES ࢫ࣌ࢡࢺࣝࢆ඲㟁Ꮚ཰㔞ἲ࠿ࡽ ᐃࡋࡓࠋ㻌䛆⤖ᯝ䛸⪃ᐹ䛇 ࢘ࣛࢩࣝࡢ୙ᑐ㟁Ꮚ཰㔞ࡢ࢚ࢿࣝࢠ࣮౫Ꮡᛶࡣࠊ❅⣲࡜㓟⣲ࡢ࡝ࡕࡽࡢ㡿ᇦ࡟࠾࠸࡚ࡶ XANES ᙉᗘ࡜࡯ࡰྠ⛬ᗘ࡛࠶ࡗࡓࠋࡇࢀࡲ࡛ࡢ◊✲࡛ᡃࠎࡣࠊྠࡌࣆ࣑ࣜࢪࣥሷ
ᇶࡢࢳ࣑ࣥ࡜ࢩࢺࢩ࡛ࣥࡣࠊࢳ࣑ࣥࡢ୙ᑐ㟁Ꮚ཰㔞ࡣ❅⣲࡜㓟⣲ࡢ࡝ࡕࡽࡢ㡿ᇦ࡟࠾࠸࡚ࡶ
࢘ࣛࢩࣝྠᵝ XANES ࡢࡑࢀ࡜࡯ࡰྠ⛬ᗘ࡛࠶ࡿ୍᪉ࠊࢩࢺࢩࣥࡣ୙ᑐ㟁Ꮚ཰㔞ࡀ XANESᙉᗘࡢ⣙ 2 ಸ࡟ቑឤࡍࡿࡇ࡜ࢆሗ࿌ࡋࡓ[1]ࠋࡇࢀࡽࡢሷᇶ࡜ࡢẚ㍑࠿ࡽࠊ୙ᑐ㟁Ꮚ཰㔞ࡣࣆ࣑ࣜࢪࣥ⎔ࡢ⨨᥮ᇶ࡟ࡼࡗ࡚ኚ໬ࡍࡿࡇ࡜ࡀண᝿ࡉࢀࡓࠋࡑࡇ࡛ࠊ5-ࣈࣟࣔ࢘ࣛࢩ࡛ࣝྠᵝࡢ ᐃࢆࡋࡓ࡜ࡇࢁࠊ୙ᑐ㟁Ꮚ཰㔞ࡢ࢚ࢿࣝࢠ࣮౫Ꮡᛶࡣȧ*ࡸȪ*࡜࠸ࡗࡓᚤ⣽ᵓ㐀ࡣࡈࡃ
ࢃࡎ࠿࡟ほ ࡉࢀࡿࡶࡢࡢࠊ୙ᑐ㟁Ꮚ཰㔞ࡣ࢖࢜ࣥ໬㜈್௨ୖࡢ࢚ࢿࣝࢠ࣮㡿ᇦ࡛ XANESࡢࡑࢀࢆ኱ࡁࡃୗᅇࡗࡓࠋࡇࡢࡇ࡜࠿ࡽࠊࣆ࣑ࣜࢪࣥሷᇶ୰࡟Ꮡᅾࡍࡿ⨨᥮ᇶࡀ↷ᑕ୰࡟ࡢࡳሷᇶୖ࡟ㄏ㉳ࡉࢀࡿ୙ᑐ㟁Ꮚࡢ⏕ᡂࡶࡋࡃࡣᾘ⁛࡟῝ࡃ㛵ಀࡋ࡚࠸ࡿࠊࡍ࡞ࢃࡕࠊ⨨᥮ᇶ౫Ꮡᛶࡀ࠶ࡿࡇ࡜ࡀ᫂ࡽ࠿࡟࡞ࡗࡓࠋ

ཧ⪃ᩥ⊩[1] T. Oka et al., App. Phys. Lett., 98 (2011) 103701.
[2] T. Oka et al., Phys. Rev. Lett., 109 (2012) 213001.

The substituent dependence on the yield of the unpaired electrons of soft X-ray irradiated pyrimidine
DNA-bases
OKAࠊ T.ࠊ YOKOYAࠊ A.ࠊ FUJIIࠊ K.ࠊ KINOࠊ Y.ࠊ SEKINEࠊ T.

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P52

14C ᶆ㆑ࡋࡓ C ࡢ඲ྜᡂ࡟㛵ࡍࡿ◊✲60㤳㒔኱㝔⌮ᕤ ‫ۑ‬ྈ஭ᬛᾈࠊ⛅ᒣ࿴ᙪࠊஂ෠ᮌᚿ㑻࠙ࡣࡌࡵ࡟ࠚ㏆ᖺࠊࣇ࣮ࣛࣞࣥ(C60)ࡸࡑࡢㄏᑟయࡣ໬⢝ရࡸ་⸆ရࡢ᭷ຠᡂศ࡜ࡋ࡚ὀ┠ࢆ㞟ࡵ࡚࠸ࡿࠋࡑࡢ୍᪉࡛ࠊࡇࢀࡽࡣࢼࣀẘᛶࡀᣦ᦬ࡉࢀ࡚࠾ࡾࠊ་⸆࣭໬⢝ရศ㔝࡬ࡢᛂ⏝࡟ྥࡅ࡚ࡣࡼࡾヲ⣽࡞యෆືែࡢㄪᰝࡀᚲせ࡛࠶ࡿࠋࡑࡢㄪᰝᡭẁࡢ୍ࡘ࡟ 14C ᶆ㆑ࡉࢀࡓ
C60 ࢆࢺ࣮ࣞࢧ࣮࡜ࡋ࡚⏝࠸࡚⏕యෆ࡟ᢞ୚ࡍࡿ᪉ἲࡀ࠶ࡿࠋࡇࡢᡭἲࡢ᭷ຠ࡞Ⅼࡣࠊࣇ࣮ࣛ
ࣞࣥࢣ࣮ࢪ㦵᱁ࡢⅣ⣲ࢆᶆ㆑ࡋࡓ C60 ࢆ౑⏝ࡍࡿࡓࡵࠊㄏᑟయࡢሙྜ࡛ࡶẘᛶࡢᣦ᦬ࡀࡉࢀ࡚
࠸ࡿࢣ࣮ࢪ⮬యࡢᣲືࢆ᭱ᚋࡲ࡛㏣࠼ࡿࡇ࡜࡛࠶ࡿࠋ14C ᶆ㆑ࡉࢀࡓ C60 ࡢྜᡂࡣ 1994 ᖺ࡟
Scrivens ࡽ࡟ࡼࡗ࡚ሗ࿌ࡉࢀ࡚࠾ࡾ[1]ࠊᙜ◊✲ᐊ࡛ࡣࡇࡢྜᡂἲࢆᨵၿࡍࡿࡇ࡜࡟ࡼࡾ཰⋡ࡀ
0.73%ࠊẚᨺᑕ⬟ࡀ 18.4 mCi/mmol ࡢ C60 ࢆྜᡂࡍࡿࡇ࡜࡟ᡂຌࡋࡓ[2]ࠋࡋ࠿ࡋ࡞ࡀࡽࠊࡇࡢ
ྜᡂࡢ㝿࡟⏝࠸ࡓ࢔࣮ࢡᨺ㟁ἲ࡛ࡣࠊࡇࢀ௨ୖࡢ཰⋡࣭ẚᨺᑕ⬟ࡢྥୖࡀぢ㎸ࡵ࡞࠸ࡇ࡜࡟
ຍ࠼ࠊ๪⏕ᡂ≀ࡢ↴࡟ࡼࡿᨺᑕ⬟ởᰁࡢ༴㝤ᛶࡀᴟࡵ࡚㧗࠸ࡇ࡜࡞࡝ࡢၥ㢟Ⅼࡀ࠶ࡾࠊ᪂つࡢ 14C ᶆ㆑ C60 ࡢྜᡂࢆ⪃࠼ࡿᚲせࡀ࠶ࡿࠋࡑࡇ࡛ࠊࡇࢀࡽࡢၥ㢟Ⅼࡢᨵၿࡍࡿࡇ࡜ࢆ┠ⓗ࡜ࡋ࡚᭷ᶵྜᡂᡭἲ[3]࡟ࡼࡿ C60[14C]ࡢ඲ྜᡂࢆヨࡳࡓࠋ࠙ᐇ㦂ࠚC60 ࡢ඲ྜᡂࡣࠊᅗ 1 ࡢ཯ᛂࢫ࣮࣒࢟࡟♧ࡋࡓ㏻ࡾ࡛࠶ࡿࠋࡲࡎࠊཎᩱ࡜࡞ࡿ 3-ࣇ࢙ࢽࣝࣉࣟࣆ࢜ࣥ㓟[14C]ࢆ࣏ࣜࣜࣥ㓟࡜ඹ࡟ຍ⇕ࡋࢺࣝࢡࢭࣥࢆྜᡂࡋࡓࠋḟ࡟ࠊࡇࡢࢺࣝࢡ
ࢭࣥ/THF ⁐ᾮ࡟ n-BuLi ࢆ⁲ୗࡋ࡚ࣜࢳ࢜໬ࡉࡏࡓࡶࡢࢆࠊ1-ࣈࣟࣔ-2-ࣈ࣓ࣟࣔࢳࣝࢼࣇࢱ
ࣞࣥ࡜཯ᛂࡉࡏ࡚ C60H36Br3 ࢆྜᡂࡋࠊࡉࡽ࡟ࠊPd ゐ፹ࢆ⏝࠸ࡓ⎔໬཯ᛂ࡟ࡼࡾ C60 ࡢ๓㥑య
࡜࡞ࡿ C60H30 ࢆྜᡂࡋࡓࠋ᭱ᚋ
࡟ࠊࡇࢀࢆࢡ࣒ࣟࣟ࣍ࣝ࡟⁐ゎࡉࡏ࡚ⓑ㔠⢊ᮎ࡟⁲ୗࡋࠊ஝⇱ࡉࡏࡓᚋࠊ┿✵ୗ࡛ 450 oC ࡟ຍ⇕ࡍࡿࡇ࡜࡛ C60 ࢆᚓࡓࠋྛ୰㛫యࡢ
ྠᐃࡣ 1H-NMR ࡜ APCI-MSᐃࠊ

C60 ࡢྠᐃࡣ UV-vis ྾཰ࢫ࣌ࢡࢺ
ࣝ

ᐃࠊ13C-NMRࠊAPCI-MSᐃ࡟ࡼࡾ⾜ࡗࡓࠋ

ᅗ 1. C60 ඲ྜᡂࡢ཯ᛂࢫ࣮࣒࢟

࠙⤖ᯝࠚ࢔࣮ࢡᨺ㟁ἲ࡜ࡣ␗࡞ࡾ㣕ᩓࡍࡿ≀㉁ࢆ⏕ᡂࡋ࡞࠸ࡓࡵࠊᨺᑕ⬟ởᰁࡢ༴㝤ᛶࡶᑡ࡞ࡃᏳ඲࡟ྜᡂࡍࡿࡇ࡜ࡀ࡛ࡁࡓࠋ
ඛ⾜◊✲ࢆཧ⪃࡟ C60 ࡢ཰⋡ࢆぢ✚ࡶࡿ࡜᭱኱࡛ 20%࡟ࠊ
ࡲࡓࠊࣇ࣮ࣛࣞࣥ 1 ศᏊ࡟ᑐࡋ࡚ 3 ࡘࡢ 14C ࢆᑟධ࡛ࡁࡿࡇ࡜࠿ࡽࠊẚᨺᑕ⬟ࢆ᭱኱࡛ 180
mCi/mmol ࡟ྥୖࡉࡏࡿࡇ࡜ࡀྍ⬟ࡔ࡜⪃࠼ࡽࢀࡿࠋⓎ⾲ᙜ᪥ࡣ཰⋡ࡸᐇ㝿ࡢẚᨺᑕ⬟࡞࡝࡟ࡘ࠸࡚࢔࣮ࢡᨺ㟁ἲࡢ⤖ᯝ࡜ẚ㍑ࡋ࡚㆟ㄽࡍࡿணᐃ࡛࠶ࡿࠋ
࠙ཧ⪃ᩥ⊩ࠚ[1] Scrivens W. A. et al., J.Am.Chem.Soc., 116, 4517-4518, 1994.
[2] ྈ஭ ௚ࠊAPSORC13 24-APP-07.
[3] Gonzalo Otero et al., Nature, 454, 865-868, 2008.
Study toward total synthesis of 14C-labeled C60
TADAI, T., AKIYAMA, K., KUBUKI, S..

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Be(p,n)཯ᛂ࡟ࡼࡿ㧗㏿୰ᛶᏊ࡟ࡼࡿ་⒪⏝ 90Y ࡢྜᡂ◊✲㸦ᚨᓥ኱㝔 1ࠊཎᏊຊᶵᵓ 2ࠊᚨᓥ኱ HBS ◊✲㒊 3㸧○Ṋ⏣᫴స 1,2ࠊሯ⏣࿴᫂ 2ࠊబ⸨ဴஓ 3ࠊὸ஭㞞ே 2ࠊỌ஭Ὀᶞ 2ࠊ㜰㛫⛱ 3࠙⥴ゝࠚ ᰾་Ꮫ⏝ᨺᑕᛶྠ఩య(RI)ࡣࠊ㧗ឤᗘࡢデ᩿㸦⒴ࠊ⬻⚄⤒⑌ᝈࠊᚰ⑌ᝈ➼㸧ࡸ἞⒪ࡢࡓࡵ࡟་⒪ࡢ⌧ሙ࡛㠀ᖖ࡟ከࡃ౑⏝ࡉࢀ࡚࠸ࡿࠋᮏ◊✲࡛ࡣࠊ἞⒪⏝ RI ࡜ࡋ࡚᭱㏆฼⏝ࡉࢀ࡚ࡁࡓ 90Y 㸦T1/2=2.67 d㸧ࢆࠊຍ㏿ჾ࡛ᚓࡽࢀࡿ㧗㏿୰ᛶᏊ(ᩘ MeV ௨ୖ)ࢆ⏝࠸࡚ຠ⋡ⓗ࡟ྜᡂࡍࡿ஦ࢆヨࡳࡿࠋ≉࡟ࠊᮏ◊✲࡛ࡣࠊ་⒪ᶵ㛵࡟ PET ➼࡬ࡢ฼⏝ࢆ┠ⓗ࡟ᑟධࡉࢀ
࡚ࡁࡓᑠᆺࢧ࢖ࢡࣟࢺࣟࣥ࡞࡝࠿ࡽᚓࡽࢀࡿ 15~30 MeV ࡢ㝧Ꮚࣅ࣮࣒࡟╔┠ࡋࠊຠ⋡ࡼࡃ୰
ᛶᏊࡀⓎ⏕࡛ࡁࡿ࡜ࡢሗ࿌ࡀ࠶ࡿ Be ࢆᶆⓗ࡜ࡋ࡚ࠊᐇ㝿࡟Ⓨ⏕ࡍࡿ㧗㏿୰ᛶᏊ࡛ 90Y ࡢྜᡂヨ㦂ࢆ⾜ࡗࡓࠋྠ᫬࡟⏕ᡂࡍࡿ๪⏕ᡂ≀ࡢᙳ㡪࡟ࡘ࠸࡚ࡶホ౯ࡋࡓࡢ࡛ሗ࿌ࡍࡿࠋ
࠙ᐇ㦂ࠚ ᐇ㦂ࡣཎᏊຊᶵᵓࢱࣥࢹ࣒ຍ㏿ჾ࡟࠾࠸࡚⾜ࡗࡓࠋ┠ⓗ᰾✀࡛࠶ࡿ90Yࢆྜᡂࡍࡿ
ࡓࡵࠊ15ࠊ25ࠊ30 MeVࡢ㝧Ꮚࣅ࣮࣒ࢆBe㔠ᒓᶆⓗ࡟⣙300nAࡢࣅ࣮࣒㔞࡛↷ᑕࡋࠊBe(p,n)཯
ᛂ࡟ࡼࡗ࡚㧗㏿୰ᛶᏊࢆⓎ⏕ࡉࡏࠊ┤ᚄ10mmࠊ㔜ࡉ0.3gࡢZrO2࣌ࣞࢵࢺ㸦98.80%⃰⦰90Zr㸧
ࢆࣅ࣮࣒๓᪉ࡢ኱Ẽ୰࡟タ⨨ࡋ⣙5᫬㛫୰ᛶᏊ↷ᑕࢆ⾜ࡗࡓࠋ↷ᑕࡋࡓZrࡣ෭༷ᚋྲྀࡾእࡋࠊ
ᐃࢆ⧞ࡾ㏉ࡋ⾜࠸ࠊࡑࡢ⤖ᯝࠊ90Y࡜ྠ᫬࡟⏕ᡂࡍࡿ90mY

Ge༙ᑟయ᳨ฟჾ࡟ࡼࡗ࡚γ⥺㸦T1/2=3.19 h㸧ࡢບ㉳㛵ᩘ࠙⤖ᯝ࡜⪃ᐹࠚ

ᐃ࡜90mY࠾ࡼࡧ๪⏕ᡂ≀ࢆᐃ㔞ࡋࡓࠋ
6

10Counts γ ⥺ࢫ࣌ࢡࢺ࣓ࣟࢺ
511keV
89
90m
Zr
Y࣮ࣜࡼࡾࠊࡑࢀࡒࢀࡢ
90m
89
5
Zr
Y
10
87m
91
↷ ᑕ ࢚ ࢿ ࣝ ࢠ࣮ ࡟ ࠾
SrY࠸ ࡚ ⏕ ᡂ ࡉ ࢀࡓ ᰾ ✀
90m
4 90
Y
Nb
10
࠾ ࡼ ࡧ ࡑ ࡢ ⏕ᡂ 㔞 ࢆᚓࡓࠋFig.1 ࡟ 30MeV
3
90
10
Nb
㝧 Ꮚ ↷ ᑕ ࡟ ࠾ࡅ ࡿ ヨ
ᩱࡢ γ ⥺ࢫ࣌ࢡࢺࣝࢆ
210♧ࡍ㸦↷ᑕ⤊஢ᚋ 1 ᫬㛫㸧ࠋࢫ࣌ࢡࢺࣝ࠿ࡽࠊ
110┠ⓗ᰾✀࡛࠶ࡿ 90mYࡢྜᡂࢆ☜ㄆ࡛ࡁࡓࠋ
010
ࡑ ࡢ ௚ ᳨ ฟ ࡉࢀ ࡓ ๪
0
500
1000
1500
2000
⏕ ᡂ ≀ ࡣ ࠊ 89Zr
Energy/keV
Fig.1 Be ࡟ 30MeV 㝧Ꮚࢆ↷ᑕࡍࡿࡇ࡜࡛Ⓨ⏕ࡍࡿ㸦 T1/2=78.4 h 㸧ࠊ 87mSr
㸦 T1/2=2.81 h 㸧ࠊ 91Y 㧗㏿୰ᛶᏊࢆ↷ᑕࡋࡓ Zr ヨᩱࡢ γ ࢫ࣌ࢡࢺࣝ
㸦↷ᑕ⤊஢ᚋ 1 ᫬㛫㸧㸦 T1/2=49.71 m㸧ࠊ 90Nb
㸦T1/2=14.6 h㸧࡛࠶ࡾࠊ90Zr(n,2n)89Zrࠊ90Zr(n,α)87mSr ࡞࡝ࡢ཯ᛂ࡛⏕ᡂࡉࢀࡓ࡜⪃࠼ࡽࢀࡿࠋ
ࡲࡓࠊ୺࡞๪⏕ᡂ≀࡛࠶ࡿ 89Zr ࡣ 90mY ࡜ẚ࡭ࠊ㝧Ꮚ࢚ࢿࣝࢠ࣮࡬ࡢ౫Ꮡࡀ኱ࡁ࠸ࡇ࡜ࡀࠊ㝧Ꮚ࢚ࢿࣝࢠ࣮2.5MeV ௨ୖ࡟࠾࠸࡚ࡣ 90mY ࡜ࡢẚࡣ኱ࡁࡃኚ໬ࡋ࡞࠸ࡇ࡜ࡀศ࠿ࡗࡓࠋ
90r
Production of Medical
Radioisotope
Y with fast neutrons by the Be(p,n) reactionm
TAKEDA, S., TSUKADA, K., SATO, T.K., ASAI, M., NAGAI, Y., SAKAMA, M.

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᰾་⸆ရ฼⏝࡟ྥࡅࡓ࢔ࢫࢱࢳࣥ ࡢ⁐፹ᢳฟ࡜ࡑࡢᢳฟࣉࣟࢭࢫ
࡟࠾ࡅࡿ໬Ꮫᙧࡢ◊✲㔠ἑ኱㝔⮬↛ 1ࠊ㔠ἑ኱⌮ᕤ 2ࠊཎᏊຊᶵᵓ 3ࠊ㜰኱㝔⌮ 4ࠊ㔠ἑ኱་⸆ಖ೺ 5 ‫ۑ‬㇂ཱྀᣅᾏ 1ࠊ๓⏣ⱥኴ 1ࠊᮧୖᣙ෤ 2ࠊす୰୍ᮁ 3ࠊ㧗ᶫᡂே 4ࠊ㮖ᒣᖾಙ 5ࠊᶓᒣ᫂ᙪ 2࠙⥴ゝࠚࡀࢇࡢ἞⒪ἲ࡜ࡋ࡚ࠊᨺᑕᛶ᰾✀ࡀᑟධࡉࢀࡓ⸆๣ࢆ㸪ேయ࡟ᢞ୚ࡍࡿࡇ࡜࡛἞⒪ࢆ⾜࠺࢔࢖ࢯࢺ࣮ࣉ἞⒪ࡀ࠶ࡿࠋ࢔࢖ࢯࢺ࣮ࣉ἞⒪࡬ࡢᛂ⏝ࡀᮇᚅࡉࢀ࡚࠸ࡿ᰾✀ࡢ୰࡛ࡶ≉࡟ࠊ211At ࢔ࢫࢱࢳࣥ-211༙ῶᮇ㸸7.2 ᫬㛫 ࡣ α ⥺ᨺฟ࡟ࡘ࠸࡚㐺ᗘ࡞࢚ࢿࣝࢠ࣮࡜ศᒱ
ẚࢆᣢࡘࡇ࡜ࡸࠊࡍ࡛࡟ᐇ⏝໬ࡉࢀ࡚࠸ࡿ 131I ࡜ྠࡌࡃࣁࣟࢤࣥඖ⣲࡛࠶ࡿࡇ࡜࠿ࡽࠊ᭱ࡶ
ὀ┠ࡉࢀ࡚࠸ࡿࠋࡋ࠿ࡋࠊAt ࡣᏳᐃྠ఩యࢆᣢࡓ࡞࠸ࡓࡵࠊࡑࡢ໬Ꮫⓗ࡞ᛶ㉁࡟ࡘ࠸࡚ࡣᮍ
ࡔ࡟୙᫂࡞Ⅼࡀከ࠸ࠋᮏ◊✲࡛ࡣࠊ↷ᑕᚋࡢ Bi ᶆⓗ࠿ࡽࡢ At ࡢศ㞳ἲࡢ୍ࡘ࡛࠶ࡿ‵ᘧศ㞳ἲ࡟╔┠ࡋࠊࡑࡢᢳฟࣉࣟࢭࢫ࡟࠾ࡅࡿ At ࡢ໬Ꮫᙧࢆゎ᫂ࡋࠊศ㞳ᚋࡢᑟධ㐣⛬タィ࡟㈨ࡍࡿࡇ࡜ࢆ┠ⓗ࡜ࡋࡓᐇ㦂ࢆ⾜ࡗࡓࠋ㻌࠙ᐇ㦂ࠚ209Bi ࢆ Al ⟩ ⣧ᗘ 99.99% ࡟ᑐࡋ࡚ཌࡉ 1.0-1.5 mg/cm2 ࡜࡞ࡿࡼ࠺࡟┿✵⵨╔ࡋࠊᶆⓗ࡜ࡋࡓࠋࡇࡢ Bi ᶆⓗࢆᩘᯛ㔜ࡡ࡚ࢫࢱࢵࢡ࡜ࡋࠊ኱㜰኱Ꮫ᰾≀⌮◊✲ࢭࣥࢱ࣮AVF ࢧ࢖ࢡࣟࢺࣟࣥ࡟࡚ 40MeV ࡢ α ࣅ࣮࣒ 1.0䠉1.5㻌 pμA ࢆ↷ᑕࡋ࡚ࠊ᰾཯ᛂ 209Bi㻔α㻘3n㻕210At ࡟ࡼࡗ࡚210
At ࢆ〇㐀ࡋࡓࠋ↷ᑕᚋࡢ Bi ᶆⓗࢆ஝ᘧ⵨␃ࡋ࡚ At ࢆ⃰ᗘࡢ␗࡞ࡿሷ㓟࡟ᤕ㞟ࠊ➼㔞ࡢࢪ࢖ࢯࣉࣟࣆ࢚࣮ࣝࢸࣝ DIPE ࡟ࡼࡗ࡚⁐፹ᢳฟࢆ⾜࠸ࠊᢳฟᚋࡢ୧┦ࢆศྲྀࡋ࡚ࡑࢀࡒࢀ Ge༙ᑟయ᳨ฟჾ࡟ࡼࡿ γ ⥺ ᐃࢆ⾜࠺ࡇ࡜࡛ศ㓄ẚࡢሷ㓟⃰ᗘ౫ᏑᛶࢆỴᐃࡋࡓࠋࡲࡓ At ࢆᤕ㞟ࡋࡓሷ㓟࡟ NaCl ࢆຍ࠼࡚ྠᵝࡢ᧯సࢆ⾜ࡗ࡚ሷ໬≀࢖࢜ࣥ⃰ᗘ౫Ꮡᛶ࡟ࡘ࠸࡚ࡶㄪ࡭ࡓࠋ
࠙⤖ᯝࠚDIPE-HCl ᢳฟ࡟࠾ࡅࡿศ㓄ẚሷ㓟⃰ᗘ౫Ꮡᛶ㸦ᅗ 1㸧࡛ࡣࠊሷ㓟⃰ᗘ 2 M ࢆቃ࡟㧗⃰ᗘ࡛ࡣṇࡢ┦㛵ࠊప⃰ᗘ࡛ࡣ㈇ࡢ┦㛵ࢆࡋ࡚࠸ࡿࡇ࡜ࡀࢃ࠿ࡗࡓࠋ
㸦ࢹ࣮ࢱࡢ୍㒊ࡣⓎ⾲῭ࡳ㹙㹛㸧ሷ໬≀࢖࢜ࣥ⃰ᗘ ᅗ 2 ࡟ࡘ࠸࡚ࡣ㐣ཤࡢ◊✲>2@࡜ẚ㍑ࡋ࡚>H+@࡟ࡼࡗ࡚>Cl㸫@ࡢᙳ㡪ࡀ␗࡞ࡿࡇ࡜ࡀ♧၀ࡉࢀࡓࠋ
㻌
㻌
㻌
㻌
㻌
㻌
㻌
㻌
㻌
㻌
㻌
ᅗ 1DIPE-HCl ᢳฟᅗ 2DIPE-HCl ᢳฟ㻌ศ㓄ẚ>HCl@౫Ꮡᛶศ㓄ẚ>Cl㸫@౫Ꮡᛶ
References[1] E. Maeda et al., APSORC13 proceeding, to be published in J. Radioanal. Nucl. Chem.
[2] C. Alliot et al., Radiochem. Acta 97 (2009) 161-165
Solvent extraction of astatine-211 for radiopharmaceutical use and its chemical form in the extraction
processTANIGUCHI, T., MAEDA, E., MURAKAMI, K., NISHINAKA, I., TAKAHASHI, N.,
WASHIYAMA, K., YOKOYAMA, A..

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