JAEA-Review

Report on JAEA’s Reimei Research Program
April 1,2006 - March 31,2007(Ed.) Hiroshi IKEZOE

Advanced Science Research CenterFebruary 2008
Japan Atomic Energy Agency

JAEA-Technology

2007-049

ᧄ࡟ࡐ࡯࠻ߪᣣᧄේሶജ⎇ⓥ㐿⊒ᯏ᭴߇ਇቯᦼߦ⊒ⴕߔࠆᚑᨐႎ๔ᦠߢߔ‫ޕ‬ᧄ࡟ࡐ࡯࠻ߩ౉ᚻਗ߮ߦ⪺૞ᮭ೑↪ߦ㑐ߔࠆ߅໧޿วࠊߖߪ‫ޔ‬ਅ⸥޽ߡߦ߅໧޿วࠊߖਅߐ޿‫ޕ‬ߥ߅‫ోߩ࠻࡯ࡐ࡟ᧄޔ‬ᢥߪᣣᧄේሶജ⎇ⓥ㐿⊒ᯏ᭴ࡎ࡯ࡓࡍ࡯ࠫ㧔http://www.jaea.go.jp/index.shtml㧕
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㧖‫ޥ‬319-1195 ⨙ၔ⋵㇊⃗㇭᧲ᶏ᧛⊕ᣇ⊕ᩮ 2 ⇟࿾ 4 ᣣᧄේሶജ⎇ⓥ㐿⊒ᯏ᭴ౝThis report is issued irregularly by Japan Atomic Energy Agency
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JAEA-Review 2007-049

ᐔᚑ 18 ᐕᐲ㤡᣿⎇ⓥᚑᨐႎ๔㓸ᣣᧄේሶജ⎇ⓥ㐿⊒ᯏ᭴ వ┵ၮ␆⎇ⓥ࠮ࡦ࠲࡯㧔✬㧕ᳰᷝ ඳ

㧔2007 ᐕ 11 ᦬ 26 ᣣฃℂ㧕ේሶജ⑼ቇߩಽ㊁ߢ㕟ᣂ⊛ߥේℂ߿⃻⽎ߩ⊒⷗ࠍ߼ߑߔవ┵ၮ␆⎇ⓥࠍኻ⽎ߣߒߡ‫⎇ޔ‬ⓥ࠹࡯ࡑࠍේሶജᯏ᭴ᄖ߆ࠄ౏൐ߔࠆ㤡᣿⎇ⓥ೙ᐲ߇ᐔᚑ 18 ᐕᐲ߆ࠄᣂߚߦ⊒⿷ߒߚ‫⎇ޕ‬ⓥᦼ㑆ࠍᦨ㐳 2 ᐕ㑆ߣߒ‫ޔ‬ᐕᐲߏߣߦ⹏ଔࠍታᣉߒߡ⺖㗴ࠍណᛯߔࠆߎߣߣߒߚ‫ޕ‬ೋᐕᐲߩᐔᚑ 18 ᐕᐲߪᔕ൐✚ᢙ 54 ઙߩਛ߆ࠄ 8 ઙࠍㆬቯߒ‫ޔ‬వ┵ၮ␆⎇ⓥ࠮ࡦ࠲࡯ߣߩ౒ห⎇ⓥߣߒߡታᣉߒߚ‫ᧄޕ‬ႎ๔ᦠߪߎ
ࠇࠄߩ㤡᣿⎇ⓥߩᚑᨐࠍ߹ߣ߼ߚ߽ߩߢ޽ࠆ‫ޕ‬ ᧄႎ๔ᦠߪ‫ޔ‬㤡᣿⎇ⓥ߆ࠄᄙߊߩၮ␆࡮ၮ⋚⎇ⓥ߇ㅴዷߔࠆ৻ഥߦߔࠆߚ߼‫ޔ‬㤡᣿⎇ⓥߩታᣉ⠪ࠃࠅឭ಴ߐࠇߚᚑᨐႎ๔ᦠࠍ߹ߣ߼‫ޕࠆ޽ߢߩ߽ࠆߔ⴫౏ޔ‬ේሶജ⑼ቇ⎇ⓥᚲ㧔㚢࿷㧕㧦‫ޥ‬319-1195 ⨙ၔ⋵㇊⃗㇭᧲ᶏ᧛⊕ᣇ⊕ᩮ 2-4

JAEA-Review 2007-049

JAEA-Review 2007-049

Report on JAEA’s Reimei Research Program
April 1, 2006 – March 31, 2007
(Ed.) Hiroshi IKEZOE
Advanced Science Research Center
Japan Atomic Energy Agency
Tokai-mura, Naka-gun, Ibaraki-ken(Received on November 26, 2007)
The Reimei (Dawn) Research Program is a research project based on public application
to be conducted within the framework of the Reimei Research Promotion project of theJapan Atomic Energy Agency. The objective of the program is to encourage original
and/or unique ideas in the field of the new frontier research of atomic energy science.
The number of the research subjects accepted in the fiscal year 2007 was 8. These
research subjects were carried out in collaboration with Advanced Science ResearchCenter. The summaries of these research subjects were compiled in this report. We hopethat new researches will be grown and developed by the help of Reimei Research
Promotion project.

Keywords: Reimei Research Program, Nuclear Science, Nuclear Energy

JAEA-Review 2007-049

 ⋡ ᰴ

1. ਛᕈሶᓸዊࡆ࡯ࡓ↢ᚑ↪ᄙጀ⤑ࡈ࡟ࡀ࡞࡟ࡦ࠭㧔࠱࡯ࡦࡊ࡟࡯࠻㧕ߩ㐿⊒࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮

1↰᧛ ❥ᴦ㧔↥ᬺᛛⴚ✚ว⎇ⓥᚲ㧕2. ಝ❗‛⾰ਛߢߩห૏૕㆙ᔃಽ㔌ࠍታ⃻ߔࠆߚ߼ߩࡠ࡯࠲ߩ㐿⊒࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮ 7ᧃศ ᱜౖ㧔ਣ๺㔚ᯏᩣᑼળ␠㧕ઁ

3. ਇဋ৻♽ߩ᡼኿✢‛ℂൻቇ෻ᔕߦ㑐ߔࠆవ┵ၮ␆⎇ⓥ࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮ 13  ൎ᧛ ᐾ੺㧔᧲੩ᄢቇ㧕ઁ
4. ⚦⢩ᱫߦ߅ߌࠆ⚦⢩ౝዊེቭ߳ߩ᳓ᵹ౉ᯏ᭴ߩ⸃᣿࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮19㡞ᔒ↰㧔ජ⪲㧕 ⮍㧔↥ᬺᛛⴚ✚ว⎇ⓥᚲ㧕5. 㜞㔚㔌㊀ࠗࠝࡦࡆ࡯ࡓࠍ೑↪ߒߚᓸዊὶὐන⦡ X ✢శḮ㐿⊒ߩߚ߼ߩၮ␆⎇ⓥ࡮࡮࡮࡮࡮࡮࡮࡮࡮ 25  ਛ᧛ ାⴕ㧔㔚᳇ㅢାᄢቇ㧕ઁ
6. 㕖ᐔⴧဳⶄᢙ Į ✢᡼಴ in vivo ࠫࠚࡀ࡟࡯࠲࡯㧦227Th-EDTMP ࠍ↪޿ߚォ⒖ᕈ㛽⣲≌ᴦ≮ᴺߩ㐿⊒࡮࡮࡮ 31  㣐ጊ ᐘା㧔㊄ᴛᄢቇ㧕ઁ
7. ᡼኿✢⠴ᕈേ‛࡮ࠢࡑࡓࠪߦ߅ߌࠆ DNA ៊்ߩୃᓳᯏ᭴ߩ⸃᣿࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮ 37  ၳᎹ ᄢ᮸㧔ർᶏ㆏ᄢቇ㧕8. 㜞⸘ᢙ₸࡮㜞ᬌ಴ല₸శሶᬌ಴ེࠍ⋡ᜰߒߚ⾍ࠅวࠊߖඨዉ૕⚛ሶߩ㐿⊒࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮ 41
␹㊁ ㇚ᄦ㧔੩ㇺᄢቇ㧕

JAEA-Review 2007-049

Contents

1. Development of Multilayer Fresnel Lens (Zone Plate) for Formation of Focused Neutron Beam࡮࡮࡮࡮࡮࡮ 1
Shigeharu Tamura (National Institute of Advanced Industrial Science and Technology)
2. Development of the Rotor for Centrifugal Separation of Isotopes in Condensed Matter
Catalyzing Psychoactive Metabolite in Marijuana࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮ 7
Masanori Sueyoshi (Maruwa Electronic Inc.) et al.
3. An Advanced Study on Non-homogeneous Radiation Physical Chemistry࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮ 13
Yosuke Katsumura (University of Tokyo) et al.
4. The Role of Water Flow into Subcellular Organella in Cell Death࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮ 19
Kaori Chiba-Kamoshida (National Institute of Advanced Industrial Science and Technology)
5. Studies for the Development of a Micro-focus Monochromatic X-ray Source with Making Use of aHighly Charged Heavy Ion Beam࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮ 25
Nobuyuki Nakamura (University of Electro-Communications) et al.
6. Development of the Method for Treatment for Bone Metastasis by Using Disequilibrium-type Alpha
Particle Emitting in Vivo Generator: 227Th-EDTMP࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮ 31
Kohshin Washiyama (Kanazawa University) et al.
7. Study on the Repair Mechanism of Ionizing Radiation-induced DNA Damage in Tardigrades࡮࡮࡮࡮࡮࡮࡮࡮ 37
Daiki Horikawa (Hokkaido University)
8. Development of Bonded Semiconductor Device for High Counting Rate High Efficiency Photon
Detectors࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮࡮ 41
Ikuo Kanno (Kyoto University)

JAEA-Review 2007-049

㧝㧚ਛᕈሶᓸዊࡆ࡯ࡓ↢ᚑ↪ᄙጀ⤑ࡈ࡟ࡀ࡞࡟ࡦ࠭
㧔࠱࡯ࡦࡊ࡟࡯࠻㧕ߩ㐿⊒Development of Multilayer Fresnel Lens (Zone Plate) for Formation of Focused
Neutron Beam↰᧛❥ᴦ
Shigeharu Tamura㧔⁛㧕↥ᬺᛛⴚ✚ว⎇ⓥᚲ శᛛⴚ⎇ⓥㇱ㐷
Photonics Research Institute, National Institute of Advanced Industrial Science and Technology᭎ⷐᄙጀ⤑ࡈ࡟ࡀ࡞࠱࡯ࡦࡊ࡟࡯࠻㧔FZP㧕ߪ㜞ノᐲ㜞ࠛࡀ࡞ࠡ࡯㨄✢↪ߩታ↪⊛ߥ㓸శ࡟ࡦ࠭ߢ޽
ࠆ‫⎇ᧄޕ‬ⓥߢߪ‫ߣࠇߎޔ‬ห᭽ߩᄙጀ⤑ᚑ⤑ᚻᴺߦࠃࠅ‫ޔ‬ਛᕈሶ೑↪ಽ㊁ߦ⾗ߔࠆᣂߒ޿࠷࡯࡞ࠍឭ
ଏߔࠆߎߣࠍ⋡⊛ߣߒߡ‫ޔ‬ᾲਛᕈሶ㗔ၞߦ߅޿ߡࡑࠗࠢࡠࡆ࡯ࡓߩ↢ᚑ߇น⢻ߥᄙጀ⤑ FZP ߩ⸳⸘㧔᧚ᢱߩㆬᛯ‫ޔ‬ኸᴺߩ⸘▚㧕ߣ⹜૞ຠߩ㐿⊒ߣࠍⴕߞߚ‫ౕޕ‬૕⊛ߦߪ Cu/Al ᄙጀ⤑ FZP ࠍ⹜૞ߔࠆ
ߣ౒ߦ‫ޔ‬Ni-Cr/Al ᄙጀ⤑‫ޔ‬Ag/Zr ᄙጀ⤑ߥߤߦߟ޿ߡᬌ⸛ߒߚ‫ޕ‬Multilayer Fresnel zone plates (FZPs) for the neutron beamline have been designed and fabricated. Firstly,materials for the FZP were examined: layer materials, wire substrate, etc.. Secondly, FZPs were designed andthree kinds of FZPs were fabricated: two Cu/Al-FZPs and a Ni (Cr)/Al-FZP.
1. ⎇ⓥ⋡⊛ਛᕈሶࡆ࡯ࡓߪ‛⾰⑼ቇ‫᧚ޔ‬ᢱ⑼ቇ‫↢ޔ‬๮⑼ቇ‫ޔ‬ේሶᩭ࡮⚛☸ሶ⑼ቇߥߤߩ᏷ᐢ޿⑼ቇᛛⴚߩ㗔ၞߢ‫ߩ⾰‛ޔ‬᭽‫‛ߥޘ‬ᕈࠍⷰኤߔࠆᚻᲑߣߒߡ㕖Ᏹߦ᦭ᦸߥ࠷࡯࡞ߢ޽ࠆ‫߇࡯ࠡ࡞ࡀࠛޕ‬ૐ޿಄ਛᕈሶࡆ࡯ࡓ㧔ᵄ㐳㧦3 - 0.3 nm㧕ߪ‫ߩ⾰⊕Ⱞޔ‬᭴ㅧ⸃ᨆ‫ޔ‬᳓⚛ࠍΆᢱߣߒߡ૶↪ߔࠆΆᢱ㔚ᳰ㑐ㅪᛛⴚߩⷰኤ㧔଀߃߫᳓⚛ๆ⬿ว㊄ਛ߿ࠞ࡯ࡏࡦ࠽ࡁ࠴ࡘ࡯ࡉਛߩ᳓⚛ߩ᜼േ㧕ߥߤߦ೑↪ߢ߈ࠆ‫߹ޕ‬ߚࠛࡀ࡞ࠡ࡯߇㜞޿ᾲਛᕈሶࡆ࡯ࡓ㧔ᵄ㐳㧦0.4 - 0.1 nm㧕ߪࠛࡀ࡞ࠡ࡯߇⚿᥏ᩰሶߩᝄേࠛࡀ࡞ࠡ
࡯ߣห⒟ᐲߢ޽ࠆߩߢ‛⾰ߩࡒࠢࡠߥ᭴ㅧࠍ⺞ߴࠆߩߦㆡߒߡ޿ࠆߣ౒ߦ‫⹜ޔ‬ᢱߩේሶ㈩೉ߛߌߢߥߊ‫ޔ‬ේሶߩᝄേ⁁ᘒ‫⏛ޔ‬᳇ࠬࡇࡦߩ㈩೉ߥߤࠍ⺞ߴࠆߎߣ߇ߢ߈ާ1ި‫⚿ޔ‬᥏᭴ㅧ⸃ᨆߩࠃ߁ߥၮ
␆‛ᕈߩಽ㊁߆ࠄ᡼኿ൻಽᨆ࡮࡜ࠫࠝࠣ࡜ࡈࠖߣ޿ߞߚ↥ᬺᔕ↪ߦㄭ޿ಽ㊁߹ߢ↪޿ࠄࠇߡ޿ࠆ
ާ2ި‫ޕ‬ਛᕈሶࡆ࡯ࡓࠍ↪޿ߚౕ૕⊛ߥᔕ↪ታ㛎੐଀ߣߒߡߪ‫ߩ⾰‛ߥ߁ࠃߩ⾰ࠢࡄࡦ࠲ޔ‬ේሶ߿ಽሶߩ㈩೉ߩ⸃᣿‫⏛ޔ‬᳇ࡔࡕ࡝࡯ߦ૶↪ߐࠇߡ޿ࠆ⏛ᕈ૕ߩ઀⚵ߺߩ⸃᣿‫ߪߦࠄߐޔ‬Ꮏᬺ᧚ᢱߩᱷ⇐ᔕജߩ
⸃ᨆާ3ި‫ޔ‬ᔕജ᷹ቯާ4ިߥߤ߇᜼ߍࠄࠇࠆ‫ߥ߁ࠃߩߎޕ‬ఝࠇߚᯏ⢻ࠍ᦭ߔࠆਛᕈሶࠍ㓸శߔࠇ߫‫ޔ‬‛⾰ߩᓸዊ㗔ၞߩ⹦⚦ߥ⒳‫ߩޘ‬ᖱႎ߇ᓧࠄࠇ‫ߩࠄࠇߎޔ‬ಽ㊁ߦᄢ߈ߊ⽸₂ߔࠆߎߣ߇ᦼᓙߐࠇࠆ‫ޕ‬ਛᕈሶ↪ߩ㓸శ⚛ሶߩౝᄖߩ㐿⊒⁁ᴫߪએਅߦ⸥ߔࠃ߁ߦ಄ਛᕈሶ↪ߩ߽ߩ߇߶ߣࠎߤߢ޽ࠆ߇‫ޔ‬ㄭᐕ‫ޔ‬ᾲਛᕈሶ↪ߩ߽ߩ߽㐿⊒ߐࠇߟߟ޽ࠆ‫ޕ‬࿖ౝߦ߅޿ߡߪ‫⑼ޔ‬ቇᛛⴚᝄ⥝⺞ᢛ⾌‫ޟ‬ਛᕈሶశቇ
⚛ሶߩ㐿⊒ߣᔕ↪㧔ᐔᚑ 12㨪16 ᐕᐲ㧕‫ޔߡ޿߅ߦޠ‬ૐࠛࡀ࡞ࠡ࡯ਛᕈሶ㧔ᾲਛᕈሶߣ಄ਛᕈሶߩ✚⒓㧕↪ߩశቇ⚛ሶో⥸ߦࠊߚࠆ⎇ⓥ߇ⴕࠊࠇ‫ޔ‬಄ਛᕈሶ↪ߩ㓸శ⚛ሶߣߒߡߪ Magnetic Lens‫ޔ‬Compound Refractive Lens (CRL) ߇‫ޔ‬ᾲਛᕈሶ↪ߩ㓸శ⚛ሶߣߒߡߪࠬ࡯ࡄ࡯ࡒ࡜࡯߇㐿⊒ߐࠇ‫᦭ޔ‬−1−

JAEA-Review 2007-049

ലߦᯏ⢻ߔࠆߎߣ߇ታ⸽ߐࠇߚާ5ި‫ޕ‬࿖ᄖߦ߅޿ߡߪ‫ޔ‬FZP㧔࡝࠰ࠣ࡜ࡈࠖ࡯ᴺߢ૞⵾㧕߇ Kearneyࠄߦࠃߞߡᦨೋߦ૞⵾ߐࠇ‫ޔ‬ᵄ㐳߇ 2 nm ߩ಄ਛᕈሶߩ㓸శ߇⏕⹺ߐࠇߚާ6ި‫ᦨޕ‬ㄭ Altissimo ࠄߦࠃߞߡ૞⵾ߐࠇߚ FZP ߽಄ਛᕈሶߩ㓸శߦ᦭ലߢ޽ࠆߎߣ߇␜ߐࠇ‫ ߩߎޔ‬FZP ߪ㊀ߨߡ૶↪ߔࠆߣᾲਛᕈሶ㗔ၞߦ߽᦭ലߣ⠨߃ࠄࠇࠆާ7ި‫ޔߚ߹ޕ‬಄ਛᕈሶ↪ߩ CRL ߪ‫ޔ‬ㄭᐕ‫⚿ޔ‬௝శቇ♽߳ߩᔕ↪
ࠍਛᔃߣߒߡ⋓ࠎߦ⎇ⓥ㐿⊒߇ⴕࠊࠇߡ޿ࠆާ8-10ި‫ޕ‬↥ᬺᛛⴚ✚ว⎇ⓥᚲߢߪᣥㅢ໡↥ᬺ⋭ Ꮏᬺᛛⴚ㒮 ᄢ㒋Ꮏᬺᛛⴚ⎇ⓥᚲᤨઍࠃࠅ‫ޔ‬㜞ࠛࡀ࡞ࠡ࡯
᡼኿శ㨄✢↪㓸శ⚛ሶߩ㧝ߟߢ޽ࠆᄙጀ⤑ࡈ࡟ࡀ࡞࠱࡯ࡦࡊ࡟࡯࠻㧔FZP㧕ߩ㐿⊒ࠍⴕߞߡ߈ߚ‫ޕ‬
ᢙ⒳㘃ታ࿷ߔࠆ㓸శ⚛ሶ㧔FZP, CRL, Laue lens ߥߤ㧕ߩਛߢᄙጀ⤑ FZP ߩᄢ߈ߥ೑ὐߪ‫(ޔ‬1) శゲ⺞ᢛ߇㕖Ᏹߦኈᤃ‫(ޔ‬2) ᐢ▸࿐ߥࠛࡀ࡞ࠡ࡯㧔ᵄ㐳㧕㗔ၞߢ૶↪น⢻ߥߎߣߢ޽ࠅ‫ޔ‬ᄢဳ᡼኿శ
SPring-8 ߦ߅޿ߡߎࠇࠄߩఝ૏ᕈࠍታ⸽ߒߡ߈ߚ‫ޕ‬ߘߎߢ੹࿁‫ޔ‬ਛᕈሶ೑↪ಽ㊁ߦ⾗ߔࠆᣂߒ޿࠷࡯࡞ࠍឭଏߔࠆߎߣࠍ⋡⊛ߣߒߡ‫ޔ‬ᾲਛᕈሶ㗔ၞߢ૶↪น⢻ߥᄙጀ⤑ FZP ߩ㐿⊒ࠍ⋡ᜰߒ‫⹜ߣ⸘⸳ޔ‬૞ຠߩ૞⵾ࠍⴕߞߚ‫ޕ‬
2. ⎇ⓥౝኈᧄ⎇ⓥ㐿⊒ߢߪ‫ߢ߹ࠇߎޔ‬ౝᄖߢ߶ߣࠎߤ㐿⊒ߐࠇߡ޿ߥ޿ᾲਛᕈሶ㗔ၞߢ૶↪น⢻ߥ㓸శ⚛ሶߩ㐿⊒ࠍ⋡⊛ߣߒ‫ޔ‬ᵄ㐳߇ 0.1㨪0.2 nm ೨ᓟߩਛᕈሶࠍᓸዊൻߔࠆߎߣ߇น⢻ߥᄙጀ⤑ FZP ߩ㐿⊒ࠍ⋡ᜰߒߚ‫ޕ‬FZP ߩ⸳⸘୯ߣߒߡ‫⋥ޔ‬ᓘ߇ 100 ࡒࠢࡠࡦ⒟ᐲ‫ޔ‬ጀᢙ㧔࠱࡯ࡦᢙ㧕ߪ 50㨪100 ⒟ᐲ
ࠍ⋡ᮡߣߒߚ‫ౕޕ‬૕⊛ߦߪ‫ޔ‬Au ࡢࠗࡗ࡯ၮ᧼਄ߦ⌀ⓨ⫳⌕ᴺߦࠃࠅ⇣ߥࠆ㧞⒳㘃ߩ㊄ዻ⭯⤑ࠍ੤੕ߦᚑ⤑ᓟ‫ߩߎޔ‬หᔃ౞ᄙጀ⤑ࠍૐⲢὐว㊄ߦၒ߼ㄟߺ‫ޔ‬ᯏ᪾⎇⏴ߦࠃࠅ⭯ ൻടᎿߒߡ‫ޔ‬FZP ࠍ૞⵾ߒߚ‫ޕ‬
߹ߕ‫ޔ‬೨Ბ㓏ߣߒߡ‫(ޔ‬1) ࡢࠗࡗ࡯ၮ᧼᧚ᢱߦߟ޿ߡ⺞ߴߚ‫ޕ‬ᐔṖߥ࠱࡯ࡦࠍᒻᚑߔࠆߚ߼ߦߪ‫ޔ‬⌀౞ᐲߦఝࠇߚၮ᧼ࠍ૶↪ߔࠆߎߣ߇ਇนᰳߛ߆ࠄߢ޽ࠆ‫ޕ‬
ૐⲢὐว㊄ߩ᧚ᢱߦߟ޿ߡ߽ᬌ⸛ߒߚ‫ޕ‬ᰴߦ‫(ޔ‬2) ᄙጀ⤑ߩ⚵ߺวࠊߖߦߟ޿ߡ‫ޔ‬ℂ⺰⊛ߦᬌ⸛ߒߡ૗⒳㘃߆ㆬ߮‫ޔ‬ㆊ෰ߩ⍮⷗߽ෳ⠨ߦߒߡ୥⵬ߣߒߡㆬቯߒߚ‫(ޔߡߒߘޕ‬3) ޿ߊߟ߆ߩ᧚ᢱߩ⚵ߺวࠊߖߦߟ޿ߡታ㓙ߦᄙጀ⤑ FZP ߩ૞⵾ࠍⴕ޿‫⹜ޔ‬૞ຠࠍ㐿⊒ߒߚ‫ޕ‬એਅߦߎࠇࠄߩ⚿ᨐࠍ␜ߔ‫ޕ‬
3. ⎇ⓥ⚿ᨐ
3-1. ᄙጀ⤑ FZP ߩ૞⵾ᣇᴺ
ᄙጀ⤑ FZP ߪࠬࡄ࠶࠲࡝ࡦࠣ⫳⌕ᴺ㧔࿑ 1 ߦⵝ⟎ߩ᭎⇛㧕ࠍ೑↪ߒ‫ޔ‬࿁ォߔࠆ⚦✢ၮ᧼਄ߦๆ෼
ᢿ㕙ⓍߩᏅ߇ᄢ߈޿㧞⒳㘃ߩర⚛ࠍ੤੕ߦᚑ⤑ᓟ‫ࠍࠇߎޔ‬ૐⲢὐว㊄ߦၒ߼ㄟࠎߢ࿕ቯߒ‫ޔ‬࿁ォゲߦኻߒߡု⋥ߦಾᢿߒ‫ޔ‬ᚲᦸߩෘߐߦ⭯ ൻߔࠆߎߣߢᓧࠄࠇࠆ㧔࿑ 2㧕‫ޕ‬㜞ࠛࡀ࡞ࠡ࡯㨄✢↪ߩᄙጀ⤑ FZP ߣ⇣ߥࠆߩߪ‫ޔ‬ၮ᧼᧚ᢱ‫ޔ‬ᚑ⤑᧚ᢱ‫ޔ‬ૐⲢὐว㊄ߪ૶↪ࠍᗐቯߔࠆਛᕈሶߩᕈ⾰ࠍ⠨ᘦߒߡㆬቯߔࠆߎߣߢ޽ࠆ‫ޕ‬3-2. ࡢࠗࡗ࡯↪ၮ᧼᧚ᢱ߅ࠃ߮ૐⲢὐว㊄ߦ㑐ߔࠆᬌ⸛㜞ⓨ㑆ಽ⸃⢻ࠍታ⃻ߔࠆߚ߼ߦߪ‫ޔߡߒߘޔ‬ᄙߊߩశ㊂ࠍ೑↪ߔࠆߚ߼ߦᐢ޿࠱࡯ࡦࠛ࡝ࠕࠍ᦭
ߔࠆ FZP ࠍ૞⵾ߔࠆߦߪ‫ޔ‬ᐔṖߥ࠱࡯ࡦ㧔ᄙጀ⤑⇇㕙㧕ࠍᒻᚑߔࠆߎߣ߇ਇนᰳߢ޽ࠅ‫߼ߚߩߘޔ‬ߦߪ‫⌀ޔ‬౞ᐲߦఝࠇߚၮ᧼ࠍ૶↪ߔࠆߎߣ‫ޔ߮ࠃ߅ޔ‬ᄙጀ⤑ߩ⚵ߺวࠊߖ‫ޔ‬ᚑ⤑᧦ઙࠍ⹜ⴕ㍲⺋ᬌ⸛ߔࠆߎߣ߇ᔅ㗇ߢ޽ࠆ‫ޕ‬−2−

JAEA-Review 2007-049

shutter

plasma
Cu

Al
wire

DC
power

DC
power

࿑ 2 หᔃ౞⚦✢⁁ᄙጀ࿑ 1 2 రࠬࡄ࠶࠲࡝ࡦࠣⵝ⟎⤑߆ࠄ FZP ૞⵾ߩ᭎⇛ߦࠃࠆ FZP ↪ᔃ౞ᄙጀ⤑ߩ૞⵾ߩ᭎⇛ࡢࠗࡗ࡯ၮ᧼ߩㇱಽߪᄙጀ⤑ FZP ߢߪశࠍㆤᢿߔࠆᓎ⋡ࠍ᦭ߔࠆ‫ޕ‬ㆊ෰ߦ㨄✢↪ᄙጀ⤑ FZP ߩ⎇ⓥ㐿⊒ߦ߅޿ߡ‫ޔ‬㨄✢ๆ෼ᢿ㕙Ⓧ߇ᄢ߈޿ Au‫ޔ‬Ag‫ޔ‬W ߦߟ޿ߡ⌀౞ᕈࠍ⺞ߴߚ⚿ᨐ‫ޔ‬Au ߇ᦨ߽ఝࠇߡ޿ߚ‫੹ޕ‬࿁‫ޔ‬ၮ᧼ߩᒝᐲࠍᒝߊ
ߔࠆⷰὐ߆ࠄ‫ޔ‬Si-3% ฽᦭ Au ၮ᧼ߩ⌀౞ᕈߦߟ޿ߡ⺞ߴߚ‫ౕޕ‬૕⊛ߦߪ⿛ᩏဳ㔚ሶ㗼ᓸ㏜㧔Hitachi: S-5000㧕ߢၮ᧼⴫㕙ߩ᭴ㅧࠍⷰኤߒߚ‫⚿ߩߘޕ‬ᨐ‫⴫ޔ‬㕙ߦᰳ㒱㧔ⓨሹ㧕߇ᄙߊሽ࿷ߒ‫ޔ‬ၮ᧼ߣߒߡߪਇㆡᒰߥߎߣ߇್᣿ߒߚ㧔࿑ 3㧕‫ޕ‬߹ߚ‫ޔ‬Au ၮ᧼ߦߟ޿ߡ߽‫ߚࠇࠄ⷗߇்ߩ⁁✢ޔ‬㧔࿑ 3㧕‫ޕ‬ߘߩߚ߼‫ޔ‬㔚⸃⎇⏴ߦࠃࠆᐔṖൻ㧔㏜㕙⎇⏴㧕ࠍ⹜ߺߚ߇‫ޔ‬
Au ߦኻߔࠆ㔚⸃⎇⏴ᛛⴚߪ⏕┙ߐࠇߡ߅ࠄߕ‫ޔ‬ᐔṖൻߪ಴᧪ߥ߆ߞߚ‫ޕ‬એ਄ߩ⚿ᨐ߆ࠄ‫⎇ᧄޔ‬ⓥߢߪ࠳ࠗࡗࡕࡦ࠼࠳ࠗ

࿑ 3 ࡢࠗࡗ࡯ၮ᧼⴫㕙ߩ⿛ᩏࠬߢ✢ᒁ߈ߐࠇߚ⁁ᘒߩ Au ࡢࠗࡗ࡯ࠍၮ᧼ߣߒߡ೑↪ߔࠆဳ㔚ሶ㗼ᓸ㏜௝

ߎߣߦߒߚ‫ޕ‬ߎࠇ߹ߢ‫ޔ‬หᔃ౞ᄙጀ⤑⹜ᢱߩ࿕ቯ‫ ⭯߮ࠃ߅ޔ‬ൻᓟߩ FZP ߩ଻ᜬౕߣߒߡૐⲢὐว㊄ࠍ૶↪ߒߡ߈ߚ‫᧚ޕ‬ᢱߣߒߡߪశߩㅘㆊ₸߇ૐ޿߽ߩ߇ᦸ߹ߒ޿‫ޕ‬X ✢↪ᄙጀ⤑ FZP ߢߪ Pb(60%)-Sn(40%)ว㊄ࠍ૶↪ߒߚ߇‫ޔ‬ᾲਛᕈሶߦኻߔࠆㅘㆊ₸ߪ 100%ߦᭂ߼ߡㄭߊ‫↪૶ޔ‬಴᧪ߥ޿‫ޔߢߎߘޕ‬Ꮢ⽼ߩૐⲢὐว㊄ࠍ⺞ᩏߒߚ‫ޕ‬Pb ࠍ฽᦭ߔࠆ⵾ຠߪⅣႺ㕙ߦ㈩ᘦߒߡ㒰ᄖߒߚ‫ޔߚ߹ޕ‬ૐⲢὐว㊄ߦߪBi ࠍ฽᦭ߔࠆ⵾ຠ߇ᄙ޿߇‫ޔ‬ᾲਛᕈሶࠍ߶ߣࠎߤㆤᢿ಴᧪ߥ޿ߩߢ㒰ᄖߒߚ‫ޔߦࠄߐޕ‬Cd ߪᾲਛᕈሶࠍㆤᢿߔࠆ⢻ജߦఝࠇࠆ߇‫߽ࠇߎޔ‬ⅣႺ㕙ߦ㈩ᘦߒߡ㒰ᄖߒߚ‫⚿ߩߘޕ‬ᨐ‫ޔ‬In(52%)-Sn(48%)ว㊄ࠍ↪޿ࠆߎߣߦߒߚ‫ޕ‬In ߪᨵࠄ߆޿㊄ዻߢ޽ࠅ‫ޔ‬ᯏ᪾⎇⏴․ᕈߦᖡᓇ㗀ࠍ෸߷ߔߎߣ߇ ᔨߐ
ࠇߚ߇‫ޔ‬ᓟㅀߔࠆࠃ߁ߦᄢ߈ߥᡰ㓚ߪⷰኤߐࠇߥ߆ߞߚ‫ޔߒߛߚޕ‬㜞ଔߢ޽ࠆߎߣ߇㔍ὐߢ޽ࠆ‫ޕ‬3-3. ᄙጀ⤑ߩ᧚ᢱߦ㑐ߔࠆᬌ⸛ᢥ₂ާ11ިࠍෳ⠨ߦߒߡ‫ޔ‬ᵄ㐳߇ 0.108 nm ߩᾲਛᕈሶߦኻߒߡๆ෼ᢿ㕙Ⓧ߇ᄢ߈޿ర⚛‫ޔ߮ࠃ߅ޔ‬ๆ෼ᢿ㕙Ⓧ߇ዊߐ޿ర⚛ࠍㆬࠎߛ‫᧚⤑⭯ޕ‬ᢱߣߒߡㆡಾߢߥ޿ర⚛㧔ෂ㒾‫᦭ޔ‬ኂߥߤ㧕ߪ㒰ᄖߒߚ‫ޕ‬೨⠪ߦߪ 30 (barn)એ਄ߩర⚛ߣߒߡ Au‫ޔ‬Ag‫ޔ‬Hf ࠍ‫ޔ‬ᓟ⠪ߦߪ 0.2 (barn) એਅߩర⚛ߣߒߡ Al‫ޔ‬Zr‫ޔ‬
Si‫ޔ‬C ࠍ୥⵬ߦㆬቯߒߚ‫ߩࠄࠇߎޕ‬ర⚛ࠍ೑↪ߒߡ‫ ߫߃଀ޔ‬Ag/C‫ޔ‬Ag/Zr‫ޔ‬Hf/C ߥߤߩᄙጀ⤑ FZP−3−

JAEA-Review 2007-049

߇૞⵾ߢ߈ࠆ‫ޕ‬
ᢥ₂ާ7ިߢߪᾲਛᕈሶ↪㧔ߚߛߒᵄ㐳 0.685 nm ߢታ㛎㧕ߩ Ni ⵾ߩ FZP ߇࡝࠰ࠣ࡜ࡈࠖ࡯ᴺߢ
૞⵾ߐࠇ‫ޔ‬㓸శታ㛎ߦᚑഞߒߡ޿ࠆߎߣ߆ࠄ‫ߩࠄࠇߎޔ‬ਛ㑆ߩ୯ߩๆ෼ᢿ㕙Ⓧࠍ᦭ߔࠆర⚛ߩਛߢ⭯⤑᧚ᢱߣߒߡࠃߊ૶↪ߐࠇࠆర⚛߽୥⵬ߣߒߡ᜼ߍߚ‫ޔߪࠄࠇߘޕ‬Ta‫ޔ‬W‫ޔ‬Ni‫ޔ‬Cr‫ޔ‬Cu‫ޔ‬Mo ߢ޽ࠆ‫ޕ‬ߥ߅‫ޔ‬ᢥ₂ާ12ިߩ NIST (National Institute of Standards and Technology) ߩᾲਛᕈሶߦ㑐ߔࠆਅ⸥ߩ࠺࡯࠲ࡌ࡯ࠬߦ߽ฦ⒳ߩ‛ᕈ୯߇ឝタߐࠇߡ޿ࠆ‫ޟߪߢߎߘޕ‬ๆ෼ᢿ㕙Ⓧߦߟ޿ߡߪㅦߐ߇ 2,200m/s ߩਛᕈሶ‫⸥ߣޠ‬ㅀߐࠇߡ߅ࠅ‫ޔ‬ᵄ㐳ߪ 0.18 nm ߣផ᷹ߐࠇࠆ‫ޕ‬3-4. FZP ߩ⸳⸘઀᭽଀
FZP ߪశࠍㅢߔ‛⾰ߣㆤᢿߔࠆ‛⾰ߣࠍ੤੕ߦหᔃ౞⁁ߦ➅ࠅ㄰ߒߚㅘㆊဳ࿁᛬ᩰሶߢ‫ޔ‬࿁᛬ߣᐓᷤലᨐߦࠃࠅ࡟ࡦ࠭ߣߒߡᯏ⢻ߔࠆ‫ޕ‬FZP ߢߪฦ࠱࡯ࡦߩ㕙Ⓧߪ╬ߒߊ‫߼ߚߩߘޔ‬ᄖ๟ㇱ߶ߤ࠱࡯ࡦ᏷ߪ⁜ߊߥࠆ‫ޕ‬ਛᔃߦඨᓘ r0 ߩ⧌✢߇޽ࠆ႐ว‫ࠆߔ↪૶ޔ‬㨄✢ߩᵄ㐳ࠍ Ȝ‫ޔ‬ὶὐ〒㔌ࠍ f ߣߔࠆߣ‫ޔ‬n ⇟⋡ߩႺ⇇ߩඨᓘ rn ߪ rn㧞 㧩r0㧞 㧗 nȜf㧔n㧩1, 2, 3,࡮࡮࡮,N㧕ߢ‫ޔ‬FZP ߩᦨዊ✢᏷㧔ᦨᄖベᏪ᏷㧕ࠍ dr ߣߒߚߣ߈‫ޔ‬ⓨ㑆ಽ⸃⢻ ǻ‫ޔ‬ὶὐ㕙ߦ߅ߌࠆࡆ࡯ࡓᓘ 2rh㧔FWHM㧕ߪ‫ ࠇߙࠇߘޔ‬ǻ‫ޕ‬
㧩1.22࡮dr ‫ޔ‬2rh㧩1.03࡮dr ߣߥࠅ‫ޔ‬ᵄ㐳ߣߪή㑐ଥߢ޽ࠆާ13ި
ᢥ₂ާ7ިߦߪᵄ㐳߇ 0.685 nm ߩ಄ਛᕈሶ↪ߩ⸳⸘଀߇⸥ߐࠇߡ߅ࠅ‫ߡߒߣ࠭ࡦ࡟ޔߚ߹ޔ‬ᯏ⢻ߔࠆߚ߼ߩᦨዊߩෘߐ㧔࿑ 2 ߢ ”t ”㧕߇⸘▚ߐࠇߡ޿ࠆ‫ᦨߢߎߎޕ‬ዊߩෘߐߣߪ‫ޔ‬૏⋧ᄌ⺞ലᨐߦࠃߞߡ࿁᛬ല₸߇ᦨᄢߣߥࠆෘߐߢ޽ࠅ‫ޔ‬t ߇ᄢ߈ߊߥߞߡ߽ᦨᄢࡇ࡯ࠢߪ๟ᦼ⊛ߦ⃻ࠇࠆ‫ߎߘޕ‬ߢᦨೋߦ‫▚⸘ߩߎޔ‬ᚻᴺߣᢥ₂ާ12ިߩᢙ୯ࠍ೑↪ߒߡ‫ޔ‬ᵄ㐳߇ 0.18 nm ߩਛᕈሶ↪ߩᄙጀ⤑ FZP
ߩ t ࠍ⸘▚ߒߚ‫⚿ߩߘޕ‬ᨐ‫ޔ‬Ni / Al (24 µm)‫ޔ‬Cu / Al (39 µm)‫ޔ‬Ag / Zr (450 µm)‫ޔ‬Ag / C (75 µm) ߣߥߞߚ‫ޕ‬ෳ⠨߹ߢߦᒰ⹥ᵄ㐳ߢߩ FZP㧔࡝࠰ࠣ࡜ࡈࠖ࡯ᴺߢ૞⵾㧕ߦߟ޿ߡ߽ t ࠍ⸘▚ߒߚ⚿ᨐ‫ޔ‬Ag(50 µm)‫ޔ‬Cu (27 µm)‫ޔ‬Ni (19 µm)‫ޔ‬Al (84 µm)‫ޔ‬Hf (50 µm)‫ޔ‬Zr ( 57 µm)‫ޔ‬C (150 µm)ߣߥߞߚ‫ޕ‬ਛᕈሶߩᵄ㐳߇⍴ߊߥࠇ߫‫ޔ‬t ߪᄢ߈ߊߥࠆ‫ޔ߫߃ߣߚޕ‬ᵄ㐳߇ 0.108 nm ߩਛᕈሶߦኻߒߡߪ‫ޔ‬Cu / Al
(66 µm)‫ޔ‬Ni (31 µm)ߣߥࠆ‫ޕ‬
ᢥ₂ާ11ިߩ‛ᕈ୯ࠍ೑↪ߒߡ⸘▚ߔࠆߣ‫ޔ‬ਛᕈሶߩᵄ㐳߇ 0.108 nm ߩᤨ‫ ߩߎޔ‬Cu / Al-FZP㧔ෘߐ㧦66 µm㧕ߢߪਇㅘㆊᏪ㧔Cu㧕ߢߩㅘㆊ₸ߪ 99.87㧑‫ޔ‬ㅘㆊᏪ㧔Al㧕ߢㅘㆊ₸ߪ 99.998㧑ߣߥࠆ‫ޕ‬߹ߚ‫ޔ‬Ni-FZP ߢߪ‫౉ޔ‬኿ߒߚਛᕈሶߩ 99.92%߇ਇㅘㆊᏪ㧔Ni㧕ࠍㅘㆊߔࠆ‫ߦ߁ࠃߩߎޕ‬ᭂ┵ߦㅘ᣿ߥ‛૕߇㓸శ࡟ࡦ࠭ߣߒߡታ㓙ߦᯏ⢻ߔࠆߩ߆ࠍ‫ޔ‬㨄✢↪ߩ FZP ߢߩ੐଀ࠍෳ⠨ߦᬌ⸛ߒ‫੹ޔ‬࿁ߩ⎇ⓥߦ߅ߌࠆ FZP ߩ⸳⸘ߩෳ⠨ߣߒߚ‫ޕ‬ᢥ₂ާ14ިߢߪ Cu / Al-FZP (5 µm)ࠍ 8 keV (0.154 nm)ߩ㨄✢ߩ㓸శߦ೑↪ߒߚ႐ว‫ߡߒߣ࠭ࡦ࡟ޔ‬ᯏ⢻ߔࠆߎߣ߇ႎ๔ߐࠇߡ޿ࠆ‫ޕ‬ߎߩᤨ‫ޔ‬ਇㅘㆊᏪ㧔Cu㧕ߢߩㅘㆊ₸ߪ 80㧑ߢ޽ࠆ‫╩ޕ‬⠪ߩታ㛎⚿ᨐߢߪ‫ޔ‬Cu / Al-FZP (20 µm) ࠍ
12.4 keV (0.1 nm)ߩ X ✢ߩ㓸శߦ೑↪ߒߚ႐ว‫ޔ‬࿁᛬㒢⇇ߩࠨࠗ࠭ߩࡑࠗࠢࡠࡆ࡯ࡓࠍ↢ᚑߒ‫߆ޔ‬ߟ‫↢ޔ‬૕ࠨࡦࡊ࡞ߩ⿛ᩏဳ X ✢㗼ᓸ㏜௝ߩขᓧߦᚑഞߒߚާ15ި‫ޔᤨߩߎޕ‬ਇㅘㆊᏪ㧔Cu㧕߅ࠃ߮㊄ࡢࠗࡗ࡯㧔ࠬ࠻࠶ࡄ࡯㧕ߢߩㅘㆊ₸ߪ 11㧑߅ࠃ߮ 0.2%ߢ޽ࠆ‫ ߩߎޕ‬FZP ࠍ 8.9 keV (0.14 nm)ߩ㨄✢ߩ㓸శߦ೑↪ߒߚ႐ว‫ޔ‬25%ߩ࿁᛬ല₸߇ᓧࠄࠇߚ߇ާ16ި‫ޔ‬ਇㅘㆊᏪ㧔Cu㧕߅ࠃ߮㊄ࡢࠗࡗ࡯㧔ࠬ࠻࠶ࡄ࡯㧕ߢߩㅘㆊ₸ߪ 51㧑߅ࠃ߮ 0.25 %ߢ޽ࠆ‫ޕ‬Cu / Al-FZP (36 µm) ࠍ 82 keV (0.015 nm)ߩX ✢ߩ㓸శߦ೑↪ߒߚ႐ว‫↢ࠍࡓ࡯ࡆࡠࠢࠗࡑޔ‬ᚑߒ‫ޔߟ߆ޔ‬㊄ࡔ࠶ࠪࡘߦߟ޿ߡㅘㆊဳ‫⿛ޔ‬ᩏဳ‫ޔ‬⚿௝ဳߩߘࠇߙࠇߩ㨄✢㗼ᓸ㏜௝ߩขᓧߦᚑഞߒߚާ17ި‫ޕ‬ਇㅘㆊᏪ㧔Cu㧕߅ࠃ߮㊄ࡢࠗࡗ࡯㧔ࠬ࠻࠶ࡄ࡯㧕ߢߩㅘㆊ₸ߪ 97.8㧑߅ࠃ߮ 56 %ߢ޽ࠆ‫⚿ߩࠄࠇߎޕ‬ᨐ߆ࠄ‫ޔ‬ਛᕈሶࡆ࡯ࡓߦኻߒߡ߽ਇ
ㅘㆊᏪߩㅘㆊ₸߇ 95%એਅߢ޽ࠇ߫࡟ࡦ࠭ߣߒߡᯏ⢻ߔࠆߣ⠨߃ߡࠃ޿‫ޕ‬ߘߎߢ‫ߩ߆ߟߊ޿ޔ‬ᄙጀ⤑ FZP㧔ᵄ㐳߇ 0.18 nm ߩਛᕈሶ↪㧕ߦߟ޿ߡਇㅘㆊᏪߩㅘㆊ₸߇ 95%−4−

JAEA-Review 2007-049

ߣߥࠆෘߐࠍ⸘▚ߒߚ‫⚿ߩߘޕ‬ᨐ‫ ޔ‬Ni / Al (2.0 mm)‫ޔ‬Cu / Al (2.6 mm) ߣߥࠅ‫ޔ‬ඨ↰ߢߩㆤᢿ₸ߪߘࠇߙࠇ 48%‫ޔ‬64% ߣߥߞߚ‫ޔߚ߹ޕ‬Ag / Zr (0.23 mm)‫ޔ‬Hf / C (0.19 mm) ߩ႐ว‫ޔ‬FZP ⥄૕ߪ⭯ߊߢ߈ࠆ߇‫ޔ‬ၮ᧼‫ޔ‬ඨ↰ߢߩㆤᢿ₸ߪߘࠇߙࠇ 7%‫ޔ‬95% ߣߥߞߚ‫ޕ‬ታ↪㕙ߦ߅޿ߡၮ᧼‫ޔ‬ඨ↰ߢߩㆤᢿ₸ߪߤߩ⒟ᐲ߇ᦸ߹ߒ޿ߩ߆ߦߟ޿ߡߪ੹ᓟߩታ㛎⊛ᬌ⸛⺖㗴ߣߒߡᱷߐࠇࠆ‫ޕ‬3-5. ᄙጀ⤑ FZP ߩ⹜૞਄⸥ߩᢙ୯ࠍ⠨ᘦߒߡ‫ޔ‬Cu/Al-FZP㧔30 ጀ㧕‫ޔ‬Ni(Cr:20%฽᦭)/Al-FZP㧔10 ጀ㧕ࠍ⹜૞ߒߚ‫ޕ‬೨⠪ߩ᧚ᢱߩㆬቯℂ↱ߪ‫⤑✚ޔߢ߹ࠇߎޔ‬ෘ߇ 10 µm ࠍ⿥߃ߡ߽Ყセ⊛ᐔṖߥ࠱࡯ࡦߩᒻᚑ߇น
⢻ߢ޽ߞߚߎߣ㧔ㅢᏱ‫ ߪߣ⤑⭯ޔ‬1-2 µm એਅ㧕‫ޔ‬ᓟ⠪ߩℂ↱ߪ‫ޔ‬ᄙጀ⤑ߩ⎇⏴㕙ߦߟ޿ߡ 10 ᐕㄭߊ᭴ㅧ⊛ᄌൻ߇ⷰኤߐࠇߡ޿ߥ޿ታ❣ࠍ᦭ߔࠆ߆ࠄߢ޽ࠆ‫ޔߒߛߚޕ‬ጀᢙࠍჇ߿ߒߚ႐วߩ࠱࡯ࡦߩ
ᐔṖᕈߦ㑐ߒߡߪᧂ⍮ᢙߢ޽ࠆ‫ޕ‬೨⠪ߦߟ޿ߡߪ㧞⒳㘃⹜૞ߒߚ‫ޕ‬ਛᕈሶߩᵄ㐳߇ 0.1 nm ߩᤨߦὶὐ〒㔌߇ 300 mm ߩ FZP㧔╙ 1 ጀ⋡ߩ࠱࡯ࡦ᏷㧦0.6 µm‫ᦨޔ‬ᄖጀߩ࠱࡯ࡦ᏷㧦0.4 µm ‫⤑✚ޔ‬ෘߪ
14 µm‫ޔ‬ၮ᧼ߩ⋥ᓘ㧦50 µm㧕ߣὶὐ〒㔌߇ 550 mm ߩ FZP㧔╙ 1 ጀ⋡ߩ࠱࡯ࡦ᏷㧦0.54 µm‫ᦨޔ‬ᄖጀߩ࠱࡯ࡦ᏷㧦0.43 µm ‫⤑✚ޔ‬ෘߪ 14.4 µm‫ޔ‬ၮ᧼ߩ⋥ᓘ㧦100 µm㧕ߢ޽ࠆ‫ޕ‬ᓟ⠪ߩ FZP ߪ 0.1 nm ߩᤨߦὶὐ〒㔌߇ 300 mm㧔╙ 1 ጀ⋡ߩ࠱࡯ࡦ᏷㧦0.6 µm‫ᦨޔ‬ᄖጀߩ࠱࡯ࡦ᏷㧦0.5 µm ‫⤑✚ޔ‬ෘ㧦5.6µm‫ޔ‬ၮ᧼ߩ⋥ᓘ㧦50 µm㧕ߢ޽ࠆ‫ޕ‬࿑ 4 ߦ Cu/Al-FZP㧔ၮ᧼ߩ⋥ᓘ㧦50 µm㧕ߩశቇ㗼ᓸ㏜௝ࠍ‫ޔ‬࿑
5 ߦฦ FZP ߩ⿛ᩏဳ㔚ሶ㗼ᓸ㏜㧔SEM㧕௝ࠍ␜ߔ‫ޕ‬

࿑ 4 Cu/Al-FZP ߩశቇ㗼ᓸ㏜௝
࿑ 5 ᄙጀ⤑ FZP ߩ⿛ᩏဳ㔚ሶ㗼ᓸ㏜௝
 (a) Cu/Al-FZP 㧔⋥ᓘ 50 µm ߩၮ᧼㧕‫ޔ‬
 (b) ߘߩㇱಽ௝‫(ޔ‬c) Cu/Al-FZP 㧔⋥ᓘ 100 µm ߩၮ᧼㧕‫ޔ‬ (d)ߣ(e) Ni(Cr:20%฽᦭)/Al-FZP㧔⋥ᓘ 100 µm ߩၮ᧼㧕(d)ߣ(e) Ni(Cr:20%฽᦭)/Al-FZP‫ޕ‬⹜૞ߒߚ 3 ⒳㘃ߩ FZP ߪ⚂ 3 mm ⷺߩඨ↰ߩਛᄩߦ૏⟎ߒ‫ޔ‬ෘߐߪ⚂ 2 mm ߢ޽ࠆ‫ޕ‬ጀᢙ㧔࠱࡯ࡦᢙ㧕
ߪᦨᄢ 30 ߢ޽ߞߚ߇‫ޔ‬⸳⸘ὶὐ〒㔌߇⍴ߌࠇ߫✚⤑ෘ߇หߓ႐วߦߪጀᢙߪჇ߃ࠆ‫ޕ‬߹ߚ‫ޔ‬✚⤑ෘࠍჇ߿ߔߎߣߪน⢻ߢ޽ࠅ‫ޔ‬100 ጀ⒟ᐲߩ࠱࡯ࡦᢙࠍ૞⵾ߔࠆߎߣ߇಴᧪ࠆ‫ޕ‬
4. ߹ߣ߼
ᄙጀ⤑ᚑ⤑ᚻᴺࠍ೑↪ߒߡ‫ޔ‬ᾲਛᕈሶ㗔ၞߢ૶↪น⢻ߥᄙጀ⭯ FZP ࠍ⹜૞ߒߚ‫ޕ‬ᄙጀ⤑ߩ᧚ᢱ‫ޔ‬଻ᜬౕߣߒߡߩૐⲢὐว㊄ߩ᧚ᢱߥߤߦߟ޿ߡᬌ⸛ߒߚᓟ‫ޔ‬Cu/Al-FZP㧔30 ጀ㧕‫ޔ‬Ni(Cr:20%฽

−5−

JAEA-Review 2007-049

᦭)/Al-FZP㧔10 ጀ㧕ࠍ૞⵾ߒߚ‫ࠇߎޕ‬એᄖߦ‫ޔ‬Ag/Zr ᄙጀ⤑߽૞⵾ߒ‫ޔ‬ᐔṖߥ࠱࡯ࡦࠍᓧߚ‫੹ޕ‬ᓟߦᱷߐࠇߚ⺖㗴ߪ‫ޔ‬శ㊂ࠍᓧࠆߚ߼ߩ FZP ߩᄢ㕙Ⓧൻ߅ࠃ߮ਛᕈሶࡆ࡯ࡓ࡜ࠗࡦߢߩታ㓙ߩ㓸శታ㛎ߢ޽ࠆ‫ޕ‬5. ෳ⠨ᢥ₂
ާ1ިhttp://neutron-www.kek.jp/kensfacility/intro/intro03.html
ާ2ިhttp://www.nucleng.kyoto-u.ac.jp/laboratory/neutron_t/neutron_t.htm#1
ާ3ިhttp://www.jaeri.go.jp/jpn/open/press/2003/030703/supp.html
ާ4ި㋈ᧁ⵨჻ et al.: ᧚ᢱ‫ޔ‬54(2005)339.
ާ5ިhttp://nop.riken.go.jp/indexJ.html
ާ6ިP.D.Kearney et al.:Nature 287(1980)313.
ާ7ިM.Altissimo et al.: Microelectronic Eng. 73–74 (2004) 644.
ާ8ިH.R. Beguiristaina et al.: Appl. Phys. Lett. 81(2002)4290.
ާ9ިJ.T. Cremer et al.: Appl. Phys. Lett. 85(2004)494.
ާ10ިJ.T. Cremer et al.: Appl. Phys. Lett. 87(2005)161913.
ާ11ިG.E.Bacon : “ Neutron Diffraction”, Clarendon Press Oxford, p.57(1955).
ާ12ިhttp://www.ncnr.nist.gov/resources/n-lengths/list.html
ާ13ިH.Aritome, H.Aoki and S.Namba: J.Vac.Sci.Technol. B3(1985)265.
ާ14ިR. M. Bionta et al: Appl. Phys. Lett. 64(1994)945.
ާ15ިN.Kamijo, et al: J.Synchrotron Radiation, 9(2002)182.
ާ16ިY.Suzuki et al: AIP Conference Proc. 507(2000)535.
ާ17ިS.Tamura et al: AIP Conference Proc. 716(2004)144.

−6−

JAEA-Review 2007-049

㧞㧚ಝ❗‛⾰ਛߢߩห૏૕㆙ᔃಽ㔌ࠍታ⃻ߔࠆߚ߼ߩࡠ࡯࠲ߩ㐿⊒Development of the Rotor for Centrifugal Separation of Isotopes
in Condensed Matterᧃศᱜౖ 1‫ޔ‬ዊ㊁ᱜ㓶 2‫ޔ‬ጟ቟ᖗ 2‫ޔ‬੗ญ⵨੺ 3‫⌀ޔ‬ਅ⨃ 2,3
Masanori Sueyoshi1, Masao Ono2, Satoru Okayasu2, Yusuke Iguchi3, Tsutomu Mashimo2,31ਣ๺㔚ᯏᩣᑼળ␠

Maruwa Electronic Inc.
2ᣣᧄේሶജ⎇ⓥ㐿⊒ᯏ᭴వ┵ၮ␆⎇ⓥ࠮ࡦ࠲࡯

Advanced Science Research Center, Japan Atomic Energy Agency
3ᾢᧄᄢቇⴣ᠄࡮ᭂ㒢ⅣႺ⎇ⓥ࠮ࡦ࠲࡯

Shock Wave and Condensed Matter Research Center, Kumamoto University᭎ⷐห૏૕㆙ᔃಽ㔌ࠍಝ❗⋧㧔ᶧ⋧‫ޔ‬࿕⋧㧕ਛߢታ⃻ߔࠆߚ߼ߩᛛⴚ㐿⊒ߩⷐߣߥࠆኾ↪ࡠ࡯࠲ߩ㐿⊒ࠍ⋡⊛ߣߒߡ޿ࠆ‫ߩߎޕ‬ᣇᴺߪ‫ޔ‬ಝ❗‛⾰ਛߢߩේሶߩᴉ㒠ℂ⺰ࠍၮᧄේℂߣߒߡ߅ࠅ‫ޔ‬หᣇᴺߢห૏૕Ớ❗ࠍ߼ߑߒߚ⎇ⓥ଀ߪߥߊ‫ޔ‬㆐ᚑߔࠇ߫ᣣᧄࠍ⿠Ḯߣߔࠆᣂⷙห૏૕Ớ❗ᛛⴚߣߥࠆ‫ޕ‬
ᐔᚑ 18 ᐕᐲߪ‫ޔ‬ᄙᲑᴉ㒠ᮏઃ߈ࡠ࡯࠲ᒻ⁁ᬌ⸛ࠍⴕ޿‫ޔ‬ၮᧄ⸳⸘ࠍ࿕߼‫ޔ‬ᕈ⢻⹜㛎↪ࡠ࡯࠲ࠍ⵾૞
ߒߚ‫ޕ‬หߓߊ‫⹜ޔ‬ᢱଏ⛎ᣇᴺߩᬌ⸛ࠍⴕ޿‫⹜ޔ‬ᢱଏ⛎࡙࠾࠶࠻ߩၮᧄ⸳⸘ࠍ࿕߼ߚ‫ޕ‬The purpose of this study is to develop the first step prototype rotor for realizing the new isotope separation
technology using centrifugal force in condensed state materials. This method is based on the theory of
sedimentation of atoms in condensed matter. In this period, we designed the rotor and the automatic sample
delivery unit for performance test.
1. ⎇ⓥ⋡⊛ߎࠇ߹ߢߦឭ᩺ߐࠇߡ޿ࠆ㆙ᔃಽ㔌ᛛⴚߦ‫ޔ‬ಝ❗⋧㧔ᶧ⋧߿࿕⋧㧕ߢߩห૏૕㆙ᔃಽ㔌ࠍน⢻ߦߒߚᛛⴚߪߥ޿‫ޔࠄ߇ߥߒ߆ߒޕ‬ᒝ޿㆙ᔃജ႐ਅߢ⿠ߎࠆ 2 ߟߩ⃻⽎‫ޔߜࠊߥߔޔ‬ಝ❗⋧ਛߩේሶߩᴉ㒠⃻⽎‫ޔ߮ࠃ߅ޔ‬ᵹേ⃻⽎㧔․ߦ࿕૕ߢⴕ߁႐วߪ႟ᕈᵹേ⃻⽎㧕ࠍ೑↪ߔࠇ߫ߎࠇࠍታ⃻ߢ߈ࠆ⷗ㅢߒ߇޽ࠆ[1,2]‫ߩߎޕ‬ᣇᴺࠍ㆐ᚑߔࠇ߫ᣣᧄࠍ⿠Ḯߣߔࠆห૏૕Ớ❗ᛛⴚߣߥࠆ‫ޕ‬ಝ❗⋧ߢ
ߪห૕Ⓧߦ᳇⋧ߩ 3-4 ᩴ߽ᄙߊߩේሶ߇ሽ࿷ߒߡ޿ࠆ‫ޕ‬න⚐ߦ⠨߃ߡห૏૕㆙ᔃಽ㔌߇ಝ❗⋧ߢน⢻ߦߥࠇ߫‫ߢ߹ࠇߎޔ‬᳇⋧ߢⴕࠊࠇߡ߈ߚ㆙ᔃಽ㔌ߩᣉ⸳ࠃࠅᢙᩴዊߐ޿ⷙᮨߩᣉ⸳ߢห╬ߩỚ❗
߇น⢻ߦߥࠆߣ⠨߃ࠄࠇࠆ‫⸳ޔߡߞ߇ߚߒޕ‬஻ᛩ⾗ߩᄢ᏷೥ᷫߦࠃࠅỚ❗ߩࡠ࡯ࠦࠬ࠻ൻ߽ᦼᓙߢ
߈ࠆߣ⠨߃ࠄࠇࠆ‫ޕ‬ਣ๺㔚ᯏ㧔ᩣ㧕ߢߪ‫ޔ‬ㄭᐕ‫ޔ‬ᣣᧄේሶജ⎇ⓥ㐿⊒ᯏ᭴ߣߩ౒ห⎇ⓥߦ߅޿ߡ⿥
㊀ജ႐ਅߢߩ‛⾰⑼ቇ⎇ⓥࠍⴕ߁ߚ߼ߩᄢኈ㊂ဳ㜞᷷⿥㊀ജ႐⊒↢ⵝ⟎ࠍ㐿⊒ߒߚ߇‫ߪ⟎ⵝߩߎޔ‬ឭ᩺ߔࠆỚ❗ᣇᴺࠍታ⃻ߔࠆߚ߼ߦᔅⷐߥၮᧄᕈ⢻ࠍ᦭ߒߚ਎⇇ߢ໑৻ߩ⿥㆙ᔃᯏߢ޽ࠆ[3]‫ޕ‬ᛛⴚ㐿⊒ߩ㎛ߣߥࠆࡠ࡯࠲ߩ㐿⊒ߦ߅޿ߡᓟㅀߔࠆ 2 ὐߩ໧㗴ὐࠍ⸃᳿ߢ߈ࠇ߫‫ޔ‬ឭ᩺ߔࠆỚ❗ᣇᴺߩ
዁᧪ߩታ↪ൻ߇⷗ㄟ߹ࠇࠆߚ߼‫ޔ‬ᄢኈ㊂ဳ㜞᷷⿥㊀ജ႐⊒↢ⵝ⟎ߩၮᧄ⸳⸘ࠍࡌ࡯ࠬߣߒߚỚ❗ⵝ⟎ߩ㐿⊒ߦ⌕ᚻߒߚ޿ߣ⠨߃ߡ޿ࠆ‫ޕ‬−7−

JAEA-Review 2007-049

㐿⊒ߔߴ߈ࡠ࡯࠲ߪ‫ޔ‬ౝოߦⶄᢙߩᴉ㒠ᮏࠍ᦭ߒߚᄙᲑᴉ㒠ᮏઃࡠ࡯࠲ߢ޽ࠆ‫ޕ‬Ớ❗ߒߚ޿ಝ❗
‛⾰㧔એᓟ‫⹜ޔ‬ᢱ㧕ߪࡠ࡯࠲ᄖㇱ߆ࠄ৻ߟ⋡ߩᴉ㒠ᮏߦଏ⛎ߔࠆ‫ޕ‬ฦᴉ㒠ᮏ߳ߩ⹜ᢱߩ⒖േߦߪ‫ޔ‬ᵹേ⃻⽎㧔․ߦ࿕⋧ߢⴕ߁႐วߪᒝ޿㆙ᔃജߦࠃߞߡᒁ߈⿠ߎߐࠇࠆ႟ᕈᵹേ⃻⽎㧕ࠍ೑↪ߔࠆ‫ޕ‬ᦨ⚳⊛ߦ‫⹜ޔ‬ᢱߪଏ⛎ߒߚ㊂ߛߌࡠ࡯࠲ᄖߦឃ಴ߐࠇࠆ‫ޕ‬ᵹേߦࠃࠅ⹜ᢱ߇ዋߒߕߟࡠ࡯࠲ౝߩᴉ
㒠ᮏࠍ⒖േߒߡ޿ࠆ㑆ߦ‫ޔ‬㊀޿ห૏૕ߪᴉ㒠ᮏߦᴉ㒠ߒ‫ޔ‬シ޿ห૏૕ߪࡠ࡯࠲ᄖߦឃ಴ߐࠇࠆ௑ะ
߇㜞ߊߥࠆ‫ࠆߌ⛯ࠍࠬ࠮ࡠࡊߩߎޕ‬੐ߢ‫ޔ‬㊀޿ห૏૕ࠍࠃࠅ೨ߩᴉ㒠ᮏߦ‫߽ᦨޔ‬シ޿ห૏૕ᚑಽ߇
ᄙߊߥߞߚ⹜ᢱࠍࡠ࡯࠲ᄖߦឃ಴ߔࠆߎߣ߇น⢻ߢ޽ࠆ‫ޔߚ߹ޕ‬዁᧪⊛ߦታ↪ൻࠍ⋡ᜰߔᲑ㓏ߣߥࠇ߫ⶄᢙߩ㆙ᔃᯏࠍ↪޿ߡࠞࠬࠤ࡯࠼ൻ߽น⢻ߢ޽ࠆ‫ޕ‬ᧄ⎇ⓥߢߪ‫ޔ‬ಝ❗⋧ߢߩห૏૕㆙ᔃಽ㔌ࠍታ⃻ߔࠆߚ߼ߩᛛⴚ㐿⊒ߩⷐߣߥࠆኾ↪ࡠ࡯࠲ߩ㐿⊒ࠍⴕ߁‫ޕ‬㐿⊒ߩᚑഞߦߪ 2 ὐߩ໧㗴ߩ⸃᳿߇ਇนᰳߢ޽ࠆ‫ߦ৻╙ޔߕ߹ޕ‬㜞ㅦ࿁ォਛߩࡠ࡯࠲ߦ⹜
ᢱࠍଏ⛎ߔࠆᔅⷐ߇޽ࠆߚ߼‫⵾࡮⸘⸳ޔ‬૞࡮࿁ォ⹜㛎ࠍⴕ޿ߘࠇࠍน⢻ߦߒߥߊߡߪߥࠄߥ޿ὐߢ
޽ࠆ‫╙ޕ‬ੑߦ‫ޔ‬࿕⋧ߢⴕ߁႐วߦߩߺᔅⷐߣߥࠆⷐ⚛ߢ޽ࠆ߇‫ޔ‬ฦᴉ㒠ᮏ߳ߩ⹜ᢱߩ⒖േߦߪ೨଀
ߩߥ޿ᣇᴺߣߒߡ㆙ᔃടㅦᐲ႐ਅߢ↢ߓࠆ႟ᕈᵹേ⃻⽎ࠍ↪޿ࠆߚ߼‫߇ࠇߎޔ‬໧㗴ߥߊ⿠ߎࠆ઀᭽
ߣߒߥߊߡߪߥࠄߥ޿ὐߢ޽ࠆ‫ޕ‬એ਄ߩ 2 ὐߩ໧㗴ὐࠍ⸃᳿ߒߚࡠ࡯࠲ࠍ㐿⊒ߔࠆߎߣࠍ⎇ⓥ⋡⊛
ߣߔࠆ‫ޕ‬
2. ⎇ⓥౝኈᧄ⎇ⓥߢߪ‫ޔ‬ᛛⴚ㐿⊒ߩⷐߣߥࠆห૏૕Ớ❗ኾ↪ࡠ࡯࠲ߩ㐿⊒⎇ⓥࠍⴕ߁‫ޕ‬วࠊߖߡ࿁ォਛߩࡠ࡯࠲ߦ⹜ᢱࠍଏ⛎ߔࠆߚ߼ߩ⹜ᢱଏ⛎࡙࠾࠶࠻ߩ⸳⸘࡮⵾૞߽วࠊߖߡⴕߥ߁‫ޕ‬
ᐔᚑ 18 ᐕᐲߩౕ૕⊛ߥ⸘↹ߪ‫ޔߕ߹ޔ‬ਣ๺㔚ᯏ㧔ᩣ㧕ߦߡᄙᲑᴉ㒠ᮏઃ߈ࡠ࡯࠲ߩ⸳⸘߅ࠃ߮ᒝ
ᐲ⸘▚ࠍⴕ޿ၮᧄᒻ⁁ࠍᬌ⸛ߔࠆ‫ߦߣ߽ࠍࠇߎޕ‬ห৻ᒻ⁁ߩࡕ࠶ࠢࠕ࠶ࡊࠍ૞⵾ߒ‫ޔ‬ᾢᧄᄢቇᚲ᦭
ߩ↢ൻቇ↪᳢↪㆙ᔃᯏ㧔7,000-10,000rpm㧕ࠍ↪޿ߡა᳝߿ࠣ࡝ࠬ‫☼ޔ‬࿯ࠍ⹜ᢱߦ⷗┙ߡߚ㧔႟ᕈ㧕ᵹേ⹜㛎ࠍⴕ޿⹜ᢱ⒖േ↪ߩḴߩᒻ⁁߿⹜ᢱߩଏ⛎ᣇᴺࠍᬌ⸛ߔࠆ‫⚿ߩࠄࠇߎޕ‬ᨐࠍ߽ߣߦਣ๺㔚ᯏ㧔ᩣ㧕ߦߡࡠ࡯࠲ߩ⸳⸘ᄌᦝߣᒝᐲ⸘▚ࠍⴕ޿ၮᧄ⸳⸘ࠍ࿕߼‫ޔ‬࿁ォ⹜㛎߿⹜ᢱଏ⛎⹜㛎ࠍⴕߥ߁ߚ߼ߩᕈ⢻⹜㛎↪ࡠ࡯࠲ࠍ⵾૞ߔࠆ‫⹜ޔߚ߹ޕ‬ᢱଏ⛎࡙࠾࠶࠻ߩ⸳⸘ࠍⴕߥ߁‫ޕ‬
3. ⎇ⓥ⚿ᨐ
3-1. ห૏૕ߩᴉ㒠ታ㛎߹ߕ‫ޔ‬ේሶജᯏ᭴ߩ㜞᷷⿥㊀ജ႐⊒↢ⵝ⟎[3]ࠍ↪޿ߡห૏૕ߩᴉ㒠ታ㛎ࠍⴕߥߞߚ‫ޕ‬࿑ 1 ߦⵝ⟎౮⌀ߣ૶↪ߒߚ⹜ᢱኽ౉ᑼߩࡠ࡯࠲ߣࠞࡊ࠮࡞ߩᮨᑼ࿑ࠍ␜ߔ‫ޕ‬ታ㛎᧦ઙߪ‫⹜ޔ‬ᢱࠬ࠭න૕㧔⹜ᢱ㐳ߐ 6mm㧕‫ᦨޔ‬ᄢ㊀ജ႐ 25 ਁ G‫⹜ޔ‬ᢱ᷷ᐲߪⲢὐ⋥ਅߩ 220͠‫ޔ‬ታ㛎ᤨ㑆ߪ 24 ᤨ㑆ߢ޽ߞߚ‫ޕ‬࿑ 2
ߪ SIMS ߦࠃࠆ⾰㊂ಽᨆ⚿ᨐߦߟ޿ߡ 118Sn/120Sn Ყࠍ⹜ᢱߩᦨᄢඨᓘ߆ࠄࡊࡠ࠶࠻ߒߚ߽ߩߢ޽ࠆ‫ޕ‬ታ㛎ᓟߩ⹜ᢱߢߪ 118Sn/120Sn Ყߢ㊀ജᣇะߦ 0.3%௑ᢳߔࠆㅪ⛯⊛ߥห૏૕Ყߩ௑ᢳ߇ᓧࠄࠇߡ޿ߚ‫ޕ‬ឭ᩺ߔࠆᣇᴺߪ‫ޔ‬ห૏૕ሽ࿷Ყߩ௑ᢳ߇⿠ߎࠇ߫ᚑ┙ߔࠆᣇᴺߢ޽ࠆ‫ޔߡߞ߇ߚߒޕ‬25 ਁ G ࡟ࡌ࡞ߢ߽ห૏૕Ớ❗ታ㛎߇น⢻ߢ޽ࠆߎߣ߇ಽ߆ߞߚ‫ޕ‬−8−

JAEA-Review 2007-049

ࡠ࡯࠲

ࠞࡊ࠮࡞

         ࿑ 1 ⿥㊀ജ႐⊒↢ⵝ⟎[3]߅ࠃ߮ࡠ࡯࠲ߣࠞࡊ࠮࡞ߩᮨᑼ࿑

㪞㫉㪸㫍㫀㫋㫐

ห૏૕ሽ࿷Ყ䋨㪪㫅㪉㪉㪇㪶㪉㪋㪿㪶㪉㪌㪢㪞䋩䋨Sn න૕䇮220㷄䇮24 ᤨ㑆䇮25 ਁ G䋩㪇㪅㪎㪌㪍㪇㪅㪎㪌㪌㪌
㪇㪅㪎㪌㪌㪇㪅㪎㪌㪋㪌♽೉㪈㪇㪅㪎㪌㪋㪇㪅㪎㪌㪊㪌
㪇㪅㪎㪌㪊㪇㪅㪎㪌㪉㪌
㪇

㪈㪇㪇㪇

㪉㪇㪇㪇

㪊㪇㪇㪇

㪋㪇㪇㪇

㪌㪇㪇㪇

㪍㪇㪇㪇

㪣㩿㱘㫄㪀

            ࿑ 2 SIMS ߦࠃࠆห૏૕ሽ࿷Ყߩ᷹ቯ

3-2. ᦭ജߥࡠ࡯࠲ᒻ⁁ߩᬌ⸛ᰴߦ‫ޔ‬25 ਁ G ߢߩห૏૕ߩᴉ㒠ታ㛎ߩ⚿ᨐࠍ߽ߣߦ‫ޔ‬ၮᧄᒻ⁁᩺ߩᬌ⸛ࠍⴕߞߚ‫ߩ⸘⸳ޕ‬ᜰ㊎ߣߒߡ‫ޔ‬቟ో₸ 1.2 ߢ 25 ਁ G એ਄‫ޔ‬400͠߹ߢታ㛎น⢻ߢ‫ޔ‬ᴉ㒠ᮏ߇ 2 Ბ⏕଻ߢ߈ࠆᒻ⁁ࠍᬌ⸛ߒߚ‫ޕ‬⹜ᢱଏ⛎ᮏࠍࡠ࡯࠲ਅ㕙ߦ‫ޔ‬ᴉ㒠ᮏ 2 Ბࠍ਄㕙ߦ⸳ߌߡ⚦ሹߢߟߥߋߣ޿߁ᒻ⁁ߦߔࠆߎߣߢ⸳⸘
ߩᜰ㊎ࠍḩߚߔᒝᐲ⸘▚⚿ᨐ߇ᓧࠄࠇߚ‫ޕ‬࿑ 3 ߦࡠ࡯࠲ࠗࡔ࡯ࠫ࿑߅ࠃ߮ᒝᐲ⸘▚⚿ᨐࠍ␜ߔ‫ޕ‬−9−

JAEA-Review 2007-049

a)

╙䋲ᴉ㒠ᮏ
╙䋱ᴉ㒠ᮏ

䊨䊷䉺

⹜ᢱ⒖േⓣ

⹜ᢱଏ⛎ᮏ

b)

        ࿑ 3 a) ࡠ࡯࠲ࠗࡔ࡯ࠫ࿑‫ޔ‬b) ANSYS ߦࠃࠆᒝᐲ⸘▚⚿ᨐ− 10 −

JAEA-Review 2007-049

3-3. Al ว㊄ࡕ࠶ࠢࠕ࠶ࡊࠍ↪޿ߚᮏౝ⹜ᢱ⒖േߩ⏕⹺߅ࠃ߮⹜ᢱṢਅᣇᴺᬌ⸛
ᰴߦ‫ޔ‬਄⸥⸳⸘ߦߡ Al ว㊄ࡕ࠶ࠢࠕ࠶ࡊࠍ૞⵾ߒ‫⹜ߚ޿↪ࠍࠇߎޔ‬ᢱṢਅᣇᴺᬌ⸛ߩߚ߼ߩ⹜㛎ࠍⴕߥߞߚ‫ޕ‬࿁ォ਄᣹ߦ઻߁⇣Ᏹᝄേߩ⊒↢╬߇ή޿ߎߣࠍ⏕⹺ߒߚߩߜ‫ޔ‬ᾢᧄᄢቇߩ↢ൻቇ↪㆙ᔃᯏࠍ↪޿ߡა᳝߿ࠣ࡝ࠬ‫☼ޔ‬࿯ࠍ⹜ᢱߦ⷗┙ߡߚ⹜ᢱṢਅ⹜㛎ࠍⴕߞߚ‫ޕ‬࿑ 4 ߦ 20000rpm ߹ߢߩ࿁ォ቟ో⏕⹺⹜㛎⚿ᨐߣ࠽ࡁⷰኤࠪࠬ࠹ࡓߦࠃࠆṢਅ⹜㛎ᤨߩ౮⌀ࠍ␜ߔ‫⹜ߩߎޕ‬㛎߆ࠄ‫⹜ޔ‬ᢱଏ⛎ᮏߩ㜞ߐࠍ 2 ୚ߦߔࠆᔅⷐ߇޽ࠆߎߣ߇ಽ߆ߞߚ‫ޔߚ߹ޕ‬ṁⲢ⹜ᢱߩṢਅ߇ᦨㆡߢ޽ࠆߎߣ߇
ಽ߆ߞߚ‫ޕ‬b)a)࿑ 4 a) ਣ๺㔚ᯏ㧔ᩣ㧕ߢߩ቟ో࿁ォ⏕⹺⹜㛎‫ޔ‬b) ᾢᧄᄢቇߢߩ⹜ᢱṢਅ⹜㛎㧔࠽ࡁⷰኤࠪࠬ࠹ࡓ㧕 ᰴߦ‫ޔ‬ა᳝ࠍ↪޿ߡ‫⹜ޔ‬ᢱଏ⛎ᮏ߆ࠄ╙ 2 ᴉ㒠ᮏ߹ߢߩ⹜ᢱߩ⒖േࠍ⺞ߴߚ‫ޕ‬ෳ⠨߹ߢߦ‫⿥ޔ‬㊀ജ႐ਅߢߪ࿕૕ߢ޽ߞߡ߽Ⲣὐ⋥ਅߢ޽ࠇ߫႟ᕈᵹേ߇㗼⪺ߦ⿠ߎࠆߎߣ߇⏕⹺ߐࠇߡ޿ࠆߚ߼‫ޔ‬ა᳝ࠍ↪޿ߚ⹜㛎⚿ᨐ߆ࠄ⹜ᢱߩ⒖േߦߟ޿ߡ⠨ኤߔࠆߎߣ߇ߢ߈ࠆ‫ޕ‬࿑ 5 ߪა᳝ߩ⒖േߩ᭽ሶࠍ
␜ߔ౮⌀ߢ޽ࠆ‫⹜ޕ‬ᢱଏ⛎ᮏߦଏ⛎ߒߚა᳝ߪ⹜ᢱ⒖േⓣࠍવߞߡ╙ 1 ᴉ㒠ᮏߦ⒖േߒ‫ޔ‬ḩ᧰ߦߥߞߚ╙ 1 ᴉ㒠ᮏ߆ࠄ‫ޔ‬ᴉ㒠ᮏ㑆ߩḴࠍવߞߡ╙ 2 ᴉ㒠ᮏ߳⒖േߔࠆߎߣ߇⏕⹺ߢ߈ߚ‫ޕ‬Al ࡕ࠶ࠢࠕ࠶ࡊ

a) ⹜ᢱଏ⛎೨b) ⓣψ╙ 1 ᴉ㒠ᮏc) ╙ 1ĺ╙ 2 ᴉ㒠ᮏ      ࿑ 5 Al ࡕ࠶ࠢࠕ࠶ࡊࡠ࡯࠲ౝߩა᳝ߩ⒖േߩ᭽ሶ㧔࠽ࡁⷰኤࠪࠬ࠹ࡓ㧕4. ߹ߣ߼
㧔㐿⊒⎇ⓥ㧕
ᄙᲑᴉ㒠ᮏઃ߈ࡠ࡯࠲ᒻ⁁ߩᬌ⸛߅ࠃ߮ᒝᐲ⸘▚ࠍⴕߞߚ‫ࠍࡊ࠶ࠕࠢ࠶ࡕޕ‬૞⵾ߒ‫ޔ‬ᾢᧄᄢቇߦ
ߡߎࠇࠍ↪޿ߚ⹜ᢱଏ⛎⹜㛎ࠍⴕ޿‫ޔ‬⹜ᢱߩଏ⛎ᣇᴺࠍ᳿ቯߒߚ
㧔ṁⲢ⁁ᘒߢߩଏ⛎߇ᦨㆡ㧕
‫ޕ‬
߹ߚ‫ޔ‬

− 11 −

JAEA-Review 2007-049

⸳⸘ߦ෻ᤋߔߴ߈⸳⸘ᄌᦝὐࠍ⏕⹺ߒߚ㧔⹜ᢱଏ⛎ᮏ㜞ߐ㧕‫ߦߣ߽ࠍࠇߎޕ‬࿁ォ⹜㛎߿⹜ᢱଏ⛎⹜㛎ࠍⴕߥ߁ߚ߼ߩᕈ⢻⹜㛎↪ߩࡠ࡯࠲ߩ⸳⸘࡮⵾૞ࠍⴕߥߞߚ‫⹜ޔߚ߹ޕ‬ᢱଏ⛎࡙࠾࠶࠻߽ṁⲢ⁁ᘒߩ⹜ᢱࠍଏ⛎ߔࠆᣇะᕈߢ઀᭽ᬌ⸛ࠍⴕ޿‫ޔ‬ၮᧄ⸳⸘ࠍ࿕߼ߚ‫ޕ‬㧔ห૏૕ߩᴉ㒠ታ㛎㧕Sn න૕ߦߟ޿ߡ‫ޔ‬᷷ᐲ 220͠ߩ࿕૕⁁ᘒߢ 24 ᤨ㑆ߩห૏૕ߩᴉ㒠ታ㛎ࠍⴕ޿‫ޔ‬25 ਁ G ࡟ࡌ࡞ߢห૏૕ߩᴉ㒠߇⿠ߎࠆߎߣࠍ⏕⹺ߒߚ‫⚿ߩߎޕ‬ᨐࠍ⸳⸘ߩᜰ㊎ߣߒߚ‫ޕ‬⻢ㄉSIMS ߦࠃࠆ⾰㊂ಽᨆߦ㑐ߒߡ‫ߏޔ‬ഥജ޿ߚߛ޿ߚᳯဈᢥቁ᳁㧔ේሶജᯏ᭴ ේሶജၮ␆Ꮏቇ⎇ⓥㇱ㐷 ⅣႺ࡮ේሶജᓸ㊂ಽᨆ⎇ⓥࠣ࡞࡯ࡊ㧕ߦᗵ⻢ࠍㅀߴߚ޿‫ޕ‬
5. ෳ⠨ᢥ₂
ާ1ިT. Mashimo; “Self-consistent approach to the diffusion induced by a centrifugal field in condensed
matter: Sedimentation”; Phys. Rev. A38 (8), 4149-4154 (1988).
ާ2ިT. Mashimo; ”Sedimentation of atoms in condensed matter: theory”, Phil.Mag.A,70 (5),739-760 (1994).
ާ3ިT. Mashimo, X. S. Huang, T. Osakabe, M, Ono, M. Nishihara, H. Ihara, M. Sueyoshi, K. Shibasaki, S.
Shibasaki and N. Mori; “Advanced high-temperature ultracentrifuge apparatus for mega-gravity
materials science”, Rev. Sci. Ins., Vol. 74, No. 1, 160-163 (2003).

− 12 −

JAEA-Review 2007-049

㧟㧚ਇဋ৻♽ߩ᡼኿✢‛ℂൻቇ෻ᔕߦ㑐ߔࠆవ┵ၮ␆⎇ⓥ
An Advanced Study on Non-homogeneous Radiation Physical Chemistryൎ᧛ᐾ੺ 1‫ޔ‬Ꮏ⮮ਭ᣿ 2‫ޔ‬ቶደ⵨૒ 2‫ޔ‬ᨋ㌏┨ 1‫ޔ‬㖧㎾ノ 2‫ޔ‬ጊ↰⑥ม 3‫ޔ‬᳗⍹㓉ੑ 3
Yosuke Katsumura1, Hisaaki Kudo2, Yusa Muroya2, Mingzhang Lin, Zhenhui Han
Reiji Yamada3 and Ryuji Nagaishi31᧲੩ᄢቇᄢቇ㒮Ꮏቇ♽⎇ⓥ⑼ේሶജ࿖㓙ኾ᡹

Department of Nuclear Engineering and Management, University of Tokyo
2᧲੩ᄢቇᄢቇ㒮Ꮏቇ♽⎇ⓥ⑼ේሶജኾ᡹

Department of Nuclear Engineering and Management, University of Tokyo
3ᣣᧄේሶജ⎇ⓥ㐿⊒ᯏ᭴࡮ේሶജၮ␆Ꮏቇ⎇ⓥㇱ㐷ⅣႺ࡮᡼኿✢Ꮏቇ࡙࠾࠶࠻࡮᡼኿ᕈᑄ᫈‛⾗ḮൻResearch Group for Utilization of Radioactive Waste Resources
Division of Environment and Radiation Science
Nuclear Science and Energy Directorate
Japan Atomic Energy Agency᭎ⷐ ⿥⥃⇇ᵹ૕ߩ᡼኿✢෻ᔕߩ․ᓽࠍ᣿ࠄ߆ߦߔࠆߚ߼ߦ‫ޔ‬᡼኿✢ᾖ኿ߢ↢ᚑߔࠆࡔ࠲ࡁ࡯࡞ਛߩṁᇦ๺㔚ሶߩ෼㊂ࠍ‫ޔ‬4,4’-bipyridyl(BPY) ࠍ᝝ᝒ೷ߣߒߡ↪޿ߚࡄ࡞ࠬ࡜ࠫࠝ࡝ࠪࠬᴺߦࠃࠅ‫ޔ‬ቶ᷷߆ࠄ⿥⥃⇇⁁ᘒ߹ߢߩ᷷ᐲ▸࿐ߢ᷹ቯߒߚ‫⇇⥃⿥ޕ‬᳓ਛߢߩ᳓๺㔚ሶߩ෼㊂ߩᄌൻߣ⦟ߊૃߚ᜼േ
ࠍ␜ߔ੐߇᣿ࠄ߆ߦߥߞߚ‫ޔߦࠄߐޕ‬BPY Ớᐲࠍᄌ߃ߚ෼㊂ᄌൻ߽᷹ቯߒ‫ޔ‬ṁᇦ๺㔚ሶߣ BPY ߩ෻ᔕㅦᐲቯᢙߩ᷷ᐲଐሽᕈࠍ᳿ቯߔࠆߎߣߦࠃࠅ‫ޔ‬᝝ᝒᤨ㑆ߣ෼㊂ߩ㑐ଥߩ᷷ᐲଐሽᕈࠍ⹏ଔߒߚ‫ޕ‬ߎࠇࠄࠍ߽ߣߦṁᇦ๺㔚ሶߩ෼㊂ᄌൻߩ᷷ᐲଐሽᕈߦߟ޿ߡ⼏⺰ߒߚ‫ޕ‬In order to characterize the radiolysis of supercritical fluids, the yields of solvated electron in methanol
have been measured from room temperature to supercritical state, 280qC, at 9MPa by pulse radiolysis with
4,4’-bipyridyl(BPY) taken as a scavenger. The change of the solvated electron yield is similar to that ofhydrated electron observed in water. Further more, the yield of solvated electron dependent on BPY
concentration has been measured and rate constant of the reaction of solvated electron toward the BPY has
also determined from room temperature to supercritical state. On the basis of above data, mechanism of thetemperature dependent yield of solvated electrons in methanol has been discussed.

1. ߪߓ߼ߦ
ᚒ‫⇇⥃⿥ߪޘ‬᳓ߩ᡼኿✢ಽ⸃ߦࠃࠅ᳓๺㔚ሶ߇↢ᚑߔࠆ੐ࠍ਎⇇ߦవ㚟ߌߡႎ๔ߒߚ [1]‫ߩߘޕ‬ๆ෼ߪቶ᷷ߢߪนⷞశ㗔ၞߦ޽ࠅ‫ ߪࠢ࡯ࡇޔ‬720nm ߢ޽ࠆ‫ޔ߇ࠈߎߣޕ‬᷷ᐲ਄᣹ߣߣ߽ߦ㐳ᵄ㐳ࠪࡈ࠻ߒ‫ޔ‬100qC ߢ 830nm‫ޔ‬200qC ߢ 920nm‫ޔ‬300qC ߢߪ 1000nm ߦჇᄢߒ‫ޔ‬400qC ߢߪ 1100nm ࠍߎ߃ࠆ‫ޕ‬ߎߩࠃ߁ߦๆ෼ࡇ࡯ࠢߪ᷷ᐲߦᄢ߈ߊଐሽߒ‫ޔ‬ߘߩࡕ࡞ๆశଥᢙߩ᷷ᐲଐሽᕈߪਇ᣿ߢ޽ࠅ‫ޔ‬− 13 −

JAEA-Review 2007-049

ߒ߆߽ኼ๮߽⍴ߊߥࠆߚ߼‫ߩߘޔ‬෼㊂⹏ଔߪ࿎㔍ߢ޽ࠆ‫ޔߢߎߘޕ‬ᚒ‫ࠍࡦࠥ࡯ࡠࠝࡆ࡞࠴ࡔߪޘ‬᝝ᝒ೷ߣߒߡ↪޿‫߇ࡦࠥ࡯ࡠࠝࡆ࡞࠴ࡔޔ‬᳓๺㔚ሶߦࠃࠅㆶరߐࠇߡ↢ߕࠆࡔ࠴࡞ࡆࠝࡠ࡯ࠥࡦߩࠞ
࠴ࠝࡦ࡜ࠫࠞ࡞ߩ᷹ቯߦࠃࠅ‫ޔ‬G ୯ࠍ᷹ቯߒߚ‫ߩߎޕ‬ᚻᴺߪ‫ޔ‬એ೨ߦ Buxton ߿ Shiraishi ߦࠃߞߡ↪
޿ࠄࠇߡ޿ߚ߽ߩߢ޽ࠆ [2,3]‫↢ޕ‬ᚑ࡜ࠫࠞ࡞ߪኼ๮߇㐳ߊ‫߽߆ߒޔ‬᷷ᐲଐሽᕈߪዊߐߊ᦭↪ߢ޽ࠆ‫ޕ‬ߒ߆ߒ‫ߩߎޔ‬ᚻᴺ߽㜞᷷ߢߪࡔ࠴࡞ࡆࠝࡠ࡯ࠥࡦߩᾲಽ⸃߇↢ߕࠆߚ߼ߦ 400qC ߹ߢߪ૶↪ߢ߈ࠆ߽ߩߩ [4]‫ࠅࠃޔ‬㜞᷷ߢߪㆡ↪ߢ߈ߥ޿‫ߢߎߘޕ‬㜞᷷ߢ቟ቯߥ᝝ᝒ೷ࠍត⚝ߒ‫ࠥ࡯ࡠࠝࡆ࡞࠴ࡔޔ‬ࡦߩᾲಽ⸃ߢ↢ߕࠆ 4,4’-bipiridyl ߇㜞᷷ߢ቟ቯߢ޽ࠆߎߣࠍ⷗಴ߒ[5]‫⇇⥃⿥ߡ޿↪ࠍࠇߎޔ‬᳓ਛ
500qC ߹ߢߩ᳓๺㔚ሶߩ෼㊂᷹ቯࠍⴕߞߚ [6]‫ޕ‬ߎࠇࠄߩ᷹ቯ߆ࠄ‫⇇⥃⿥ޔ‬᳓ਛߩ᳓๺㔚ሶߩ෼㊂ߪ᷷ᐲߩߺߥࠄߕ‫ޔ‬࿶ജ (ኒᐲ) ߦ߽ଐሽߔࠆ
ߎߣ߇⷗಴ߐࠇߚ‫ޕ‬25MPa ਅߢߪ‫ߩߘޔ‬෼㊂ߪ⿥⥃⇇᳓ߦߥߞߚ⋥ᓟߦᦨᄢ୯ߦ೔㆐ߒ‫ߦࠄߐޔ‬᷷ᐲ߇਄߇ࠆߣᷫዋߔࠆ‫ߥ߁ࠃߩߎޕ‬᜼േߪ․ᓽ⊛ߢ‫ߥ߁ࠃߩߎޔ‬෼㊂ߩᄌൻߪࡌࡦ࠱ࡈࠚࡁࡦߩ᳓
ṁᶧߩ᡼኿✢ಽ⸃ߢ߽⷗಴ߐࠇ‫ޔ‬Ȗ ✢ᾖ኿ታ㛎߆ࠄ߽ⵣઃߌࠄࠇߡ޿ࠆ [7]‫ޕ‬ᧄ⎇ⓥߢߪ‫․ߥ߁ࠃߩߎޔ‬ᓽ߇ઁߩ⿥⥃⇇ᵹ૕ߢ߽⏕⹺ߢ߈ࠆߩ߆ᬌ⸛ߔࠆߚ߼ߦ‫⇇⥃⿥ޔ‬᳓ਛߢ↪޿ߚᚻᴺࠍㆡ↪ߒߡ‫ޔ‬᳓ߩࡕ࠺࡞ߣ⷗ߥߖࠆࡔ࠲ࡁ࡯࡞ࠍ↪޿ߡ‫࡞࡯ࡁ࠲ࡔޔ‬ਛߦ↢ᚑߔࠆṁᇦ๺㔚ሶ෼㊂ࠍ᷹ቯߔࠆߎߣߦߒߚ‫ޕ‬
2. ታ㛎 ⿥⥃⇇ᵹ૕ࠍ↪޿ࠆታ㛎ߢߪ‫⇇⥃⿥ޔ‬ᵹ૕ࠍ↢ᚑߔࠆᔅⷐ߇޽ࠆ‫ޕ‬࿑ 1 ߪታ㛎ߢ૶↪ߒ

H. T. cell

Heater controllerߚ⿥⥃⇇ᵹ૕ታ㛎↪ᵹㅢࠪࠬ࠹ࡓߢ޽ࠆ‫ޕ‬ᶧ

Pump

60

Sample૕⹜ᢱߪࡐࡦࡊߦࠃࠅ᛼ߒ಴ߐࠇ‫੍ޔ‬ᾲེ‫ޔ‬

Thermocouple㜞᷷㜞࿶࠮࡞ࠍㅢㆊߒߡ‫ޔ‬⢛࿶ᑯࠍㅢࠅᛮߌ

Preheater
15

Coolerߡឃ಴ߐࠇࠆ‫ߣࡊࡦࡐޕ‬⢛࿶ᑯߩ㑆߇㜞࿶ߦ

Quartzwindow

HC22

6
2
15

Analyzing
light

Cell

Sapphire
window

20

Pressure regulator⛽ᜬߐࠇࠆ‫⹜ޕ‬ᢱߪ੍ᾲེߢ᣹᷷ߐࠇ‫ޔ‬㜞࿶Electron beam࠮࡞ߢᚲቯߩ㜞᷷ߦ೔㆐ߔࠆ‫ޕ‬ᓥߞߡ‫⥃⿥ޔ‬Drain⇇ᵹ૕ߪ㜞᷷㜞࿶࠮࡞ߢᒻᚑߐࠇࠆ੐ߦߥࠆ‫ޕ‬࠮࡞ߪਅᣇߩ⓹ߩ⭯ߊߥߞߡ޿ࠆㇱಽ߆ࠄ࿑ 1 ⿥⥃⇇ᵹ૕ታ㛎↪ᵹㅢࠪࠬ࠹ࡓ

㜞ࠛࡀ࡞ࠡ࡯㔚ሶࡄ࡞ࠬࠍᛂߜㄟߺ‫⥃⿥ޔ‬⇇ࠕ࡞ࠦ࡯࡞ਛߢ↢ᚑߒߚൻቇ⒳ߩๆ෼ࠍࠨࡈࠔࠗࠕ⓹߆ࠄಽᨆశࠍዉ౉ߒߡ᷹ⷰߔࠆ‫ࠬࠪߩߎޕ‬࠹ࡓߪ⿥⥃⇇᳓ታ㛎ߢ↪޿ߚࠪࠬ࠹ࡓߢ޽ࠆ‫ޕ‬ ࡄ࡞ࠬ࡜ࠫࠝ࡝ࠪࠬᴺߦࠃࠅ‫ޔ‬⍴ኼ๮ൻቇ⒳ߩๆ෼ߩᤨ㑆ಽ⸃⢻ๆ෼᷹ቯࠍⴕߞߚ‫᧲ޕ‬ᶏ᧛ߦ޽ࠆ᧲੩ᄢቇᄢቇ㒮Ꮏቇ♽⎇ⓥ⑼ේሶജኾ᡹ߦ⸳⟎ߩ᷹ቯⵝ⟎ࠍ೑↪ߒߚ‫ߩࠄ߆ࠢ࠶࠽ࠗ࡜ޕ‬㔚ሶࡆ࡯ࡓࡄ࡞ࠬ‫࡯ࠡ࡞ࡀࠛޔ‬35MeV‫ࠬ࡞ࡄޔ‬᏷ 10

LensesMonochromator PhotodiodeH.T. Cellߥ޿ߒ 50ns ࠍ↪޿ߚ࠽ࡁ⑽ࡄ࡞ࠬ࡜ࠫࠝ࡝ࠪ
ࠬࠪࠬ࠹ࡓߢ޽ࠆ‫ޕ‬࿑ 2 ߦࡄ࡞ࠬ࡜ࠫࠝ࡝ࠪࠬ

PulsedLamp

Beam
Amplifierࠪࠬ࠹ࡓߩో૕࿑ࠍ␜ߔ‫ߩࠢ࠶࠽ࠗ࡜ޕ‬ᾖ኿ญߦ㜞᷷㜞࿶࠮࡞ࠍ⸳⟎ߔࠆ‫ޕ‬శḮ߆ࠄߩࡄ࡞ࠬ

Computer
LINAC

Pulse
generatorశࠍ࠮࡞ߦㅘㆊߐߖ‫ߩߘޔ‬ᒝᐲߩᤨ㑆ᄌൻࠍశᬌ಴ེߢ᷹ቯ‫ޔ‬ାภࠍࠝࠪࡠࠬࠦ࡯ࡊߦㅍࠅ‫ޔ‬ࠦࡦࡇࡘ࡯࠲ߢ⸃ᨆ‫⸥ޔ‬㍳ߔࠆ‫ޕ‬ ࡔ࠲ࡁ࡯࡞ߩ⥃⇇ὐߪ᷷ᐲ 239.5qC‫ޔ‬࿶ജ

− 14 −

Oscilloscope࿑ 2 ࡄ࡞ࠬ࡜ࠫࠝ࡝ࠪࠬࠪࠬ࠹ࡓ

JAEA-Review 2007-049

8.1MPa ߢ޽ࠆ‫⇇⥃⿥ޕ‬᳓ߩ⥃⇇ὐ‫ޔ‬᷷ᐲ 374qC‫ޔ‬࿶ജ 22.1MPa ߦᲧߴࠆߣ᷷ᐲ‫ޔ‬࿶ജߣ߽ዊߐ޿‫ޕ‬ᓥߞߡ‫߫ߒ߫ߒ߇⓹ࠕࠗࠔࡈࠨޔ‬⎕៊ߔࠆ⿥⥃⇇᳓ߩታ㛎ࠃࠅ߽‫ޔ‬ታ㛎ߪኈᤃߣߥࠆ‫࡞࡯ࡁ࠲ࡔޕ‬ߪᏒ⽼ߢᦨ߽⚐ᐲߩ㜞޿߽ߩࠍ⾼౉‫ޕߚߒ↪૶߹߹ߩߘޔ‬᝝ᝒ೷ߣߒߡ 4,4’-bipiridyl ࠍ↪޿ߚ‫ޕ‬
3. ⎇ⓥ⚿ᨐߣ⼏⺰(1) ࡔ࠲ࡁ࡯࡞ਛߢߩ BPY ߩ෻ᔕ ᳓ṁᶧਛߩ BPY ߩ෻ᔕߦߟ޿ߡߪ⹦ߒߊᬌ⸛ߐ
ࠇߡ߅ࠅ‫ࠍࠇߎޔ‬ෳ⠨ߦߔࠆߎߣߦࠃࠅ‫࡯ࠦ࡞ࠕޔ‬࡞ਛߩ෻ᔕߪᰴߩࠃ߁ߦㅴ߻ߎߣ߇್ߞߚ‫ޕ‬
H+ (CH3OH)
BPY + esol- o BPYHx
හߜ‫ޔ‬BPY ߪṁᇦ๺㔚ሶߣ⋥ߜߦ෻ᔕߒ‫↢ޔ‬ᚑߒߚࠕ࠾ࠝࡦߪࡊࡠ࠻ࡦൻߒߡ᳓⚛ઃടဳ࡜ࠫࠞ࡞ߣߥ
ࠆ‫ߦࠄߐޔߪࠄࠇߎޕ‬ᒁ߈⛯޿ߡࠁߞߊࠅߣ H+ߣ෻ᔕߒߚࠅ‫ޔ‬ਇဋൻ෻ᔕ╬ࠍ߅ߎߔ‫ޕ‬

࿑ 3 1mM BPY ฽᦭ࡔ࠲ࡁ࡯࡞ṁᶧߩࡄ࡞ࠬ࡜ࠫࠝ࡝ࠪࠬߢ᷹ⷰߐࠇࠆㆊᷰๆ෼

BPYHx + H+ o BPYH2x+
BPYHx + BPYHx o BPYH2x+ + BPYx1mM BPY ࠍ฽߻ࡔ࠲ࡁ࡯࡞ߩࡄ࡞ࠬᾖ኿ᓟߩๆ෼
ࠬࡍࠢ࠻࡞ࠍ࿑ 3 ߦ␜ߔ‫ޕ‬500ns ߢ↢ᚑߒߡ޿ࠆߩ
߇ BPYHx‫ޔ‬25Ps ߢߪᄢㇱಽߪ BPYH2x+ߦᄌൻߒߡ޿ࠆ‫ޕ‬ ᷷ᐲ߇਄᣹ߔࠆߦᓥ޿‫ޔ‬෻ᔕߪടㅦߔࠆߣߣ߽ߦ
BPYHxߩๆ෼߽⍴ᵄ㐳ࠪࡈ࠻ߔࠆߎߣ߇᷹ⷰߐࠇ
ࠆ‫ޕ‬ቶ᷷ߢๆ෼ࡇ࡯ࠢߢ޽ࠆ 540nm ߩᒝᐲࠍṁᇦ๺㔚ሶߩ᝝ᝒ㊂ߣ⷗ߥߔߎߣߦߒߚ‫࡞ࡕޕ‬ๆశଥᢙߪ
᳓ṁᶧਛߩ୯ 12,000M-1cm-1 ࠍ↪޿‫ޔ‬᷷ᐲߦଐሽߒߥ

࿑ 4 5mM BPY ฽᦭ࡔ࠲ࡁ࡯࡞ṁᶧߢ᷹ቯߒ

޿ߣߒߡ▚಴ߒߡ޿ࠆ‫ߩߎޕ‬઒ቯߪ⿥⥃⇇᳓ 400qCߚ᝝ᝒṁᇦ๺㔚ሶ G ୯ߩ᷷ᐲଐሽᕈ

ߢߩࡔ࠴࡞ࡆࠝࡠ࡯ࠥࡦࠍ↪޿ߚታ㛎⚿ᨐߣ⦟޿৻
⥌ࠍ␜ߔߎߣ߆ࠄᅷᒰߢ޽ࠆߣ್ᢿߒߡ޿ࠆ‫ޕ‬(2) ṁᇦ๺㔚ሶ G ୯ߩ᷷ᐲଐሽᕈ ࿶ജࠍ৻ቯߩ 9MPa ߩ߽ߣߢ᷹ቯߒ‫ޔ‬਄ߦㅀߴߚ
ᚻ⛯߈ߢ⹏ଔߒߚṁᇦ๺㔚ሶߩ G ୯ߩ᷷ᐲଐሽᕈࠍ
࿑ 4 ߦ␜ߔ‫ޕ‬ቶ᷷߆ࠄ 200qC ߹ߢߪዋߒჇട᳇๧ߢ
޽ࠆ߇‫৻߷߶ޔ‬ቯ୯ࠍ␜ߔ‫ߦࠄߐޕ‬᷷ᐲ߇਄᣹ߔࠆ
ߣ‫⇇⥃ޔ‬ὐߦㄭߠ޿ߚᚲߢዋߒᷫዋߒߚᓟ‫⇇⥃⿥ޔ‬⁁ᘒߦ౉ߞߡᕆỗߥჇᄢࠍ␜ߔ‫ޕ‬250qC ߢࡇ࡯ࠢࠍ
␜ߒߚᓟ‫ޔ‬ᕆỗߦᷫዋߔࠆ‫ޕ‬ቶ᷷ߢߪ Getoff ߩႎ๔[8] ߣ৻⥌ߒߡ޿ࠆ‫ޔߚ߹ޕ‬200qC એਅߢߪࡔ࠴࡞ࡆ
ࠝࡠ࡯ࠥࡦࠍ↪޿ߚታ㛎߽ታᣉߒߚ߇‫ޔ‬BPY ߢߩ⹏ଔߣቢోߦ৻⥌ߒߡ޿ࠆߎߣ߽࿑߆ࠄ್ࠆ‫࡞࠴ࡔޕ‬ࡆࠝࡠ࡯ࠥࡦߪ㜞᷷ߢߪਇ቟ቯߢ‫ߩߎޔ‬᷷ᐲએ਄ߢ
ߪ⥄⊒⊛ߥ෻ᔕ߇ㅴⴕߔࠆߎߣߢ‫ࠅࠃޔ‬㜞᷷ߢߩ᷹− 15 −

࿑ 5 1mM BPY ฽᦭᳓ṁᶧߢ᷹ቯߒߚ
᝝ᝒ᳓๺㔚ሶ G ୯ߩ᷷ᐲଐሽᕈ

JAEA-Review 2007-049

ቯߦߪㆡߐߥ޿ߎߣ߇␜ߐࠇߚ‫ޕ‬ ߎߩࠃ߁ߥ㔚ሶ෼㊂ߩ᷷ᐲଐሽᕈߪ⿥⥃⇇᳓ਛߢߩ᷹
ቯߢ߽᷹ⷰߐࠇߡ޿ࠆ‫ޕ‬
࿑ 5 ߪ 25MPa ߩ࿶ജਅ 1mM BPY฽᦭᳓ṁᶧߢ᷹ቯߒߚ᝝ᝒ᳓๺㔚ሶ G ୯ߩ᷷ᐲଐሽᕈߢ
޽ࠆ‫ޕ‬400qC ߹ߢߪࡔ࠴࡞ࡆࠝࡠ࡯ࠥࡦ‫ޔ‬400qC એ਄ߪ
BPY ߢ᷹ቯߒߚ߽ߩߢ޽ࠆ‫ޕ‬ቶ᷷߆ࠄ 300qC ߹ߢߪ⋥✢⊛ߦჇടߔࠆ߇‫ߩߘޔ‬ᓟᷫዋߒ‫⇇⥃ޔ‬ὐ⋥೨ߢߩᷫዋ߇
⪺ߒ޿‫⁁⇇⥃⿥ޕ‬ᘒߦߥߞߚㅜ┵ߦჇᄢߒ‫৻ޔ‬ᣤ 400qC
ߢᦨᄢ୯ࠍᒻᚑߒߚᓟ‫ޔ‬ᷫዋߔࠆߎߣ߇⷗޿ߛߐࠇߡ޿
ࠆ‫ࠍࠇߎޕ‬వߩ⚿ᨐߣᲧセߒߡ‫⇇⥃ޔ‬ὐ⋥೨ߢᷫዋ‫⿥ޔ‬⥃⇇⁁ᘒߦ౉ߞߚᚲߢᦨᄢ୯ࠍᒻᚑߔࠆߥߤ‫⇇⥃⿥ޔ‬᳓ਛ᳓๺㔚ሶ߅ࠃ߮‫࡞࡯ࠦ࡞ࠕ⇇⥃⿥ޔ‬ਛߩṁᇦ๺㔚ሶߩ
G ୯ߣ߽㕖Ᏹߦ㘃ૃߒߚ᜼േࠍ␜ߔ‫ޕ‬

࿑ 6 5mMBPY ฽᦭ࡔ࠲ࡁ࡯࡞ਛṁᇦ๺㔚ሶ↢ᚑ㊂ߩ᷷ᐲߣኒᐲଐሽᕈߩਃ
ᰴరࡊࡠ࠶࠻ ᄥ޿✢ߢ⚿ࠎߛ࠺࡯࠲ ߎߩ᜼േ߇ߤߩࠃ߁ߥᯏ᭴ߦၮߠ޿ߡ޿ࠆߩ߆ࠍ⸃᣿

߇࿑ 4 ߦ␜ߔ߽ߩߦኻᔕߔࠆ‫ޕ‬ߔࠆߎߣ߇ᰴߩ⺖㗴ߣߥࠆ‫ޔߢߎߘޕ‬᳓ߩ⒳‫ࡔ࡜ࡄߩޘ‬࡯࠲࡯ߩᄌൻߣ G ୯ߩᄌൻߩ⋧㑐ࠍᲧセߒߚ‫ޔ߫߃଀ޕ‬ታ㛎᧦ઙਅߢߩኒᐲ߿⺃㔚₸ᄌൻߣߩᲧセߢ޽ࠆ߇‫ޔ‬G ୯߇ᦨᄢ୯ࠍ␜ߔߩߪ‫ޔ‬ኒᐲߩ႐ว߽⺃㔚₸ߩ႐ว߽ᕆỗߥᷫዋ߇⚳ੌߒߚㇱಽߦኻᔕߒߡ޿ࠆ‫⁁⇇⥃⿥ޕ‬ᘒߢߩࡒࠢࡠߥ᭴ㅧ߇ߎࠇࠄߩ᜼േߣᷓߊ㑐ଥߒߡ޿ࠆߣ⠨߃ࠄࠇࠆ߇‫⹦ޔ‬⚦ߥ⸘▚ߪታᣉߐࠇߡ޿ߥ޿‫੹ޕ‬ᓟࡒࠢࡠ᭴ㅧߩ⸘▚ߣታ㛎ߩᲧセ߇ᔅⷐߣᕁࠊࠇࠆ߇‫੹ޔ‬ᓟߩ⺖㗴ߢ޽ࠆ‫ޕ‬ ߎߎߦߪ␜ߐߥ޿߇‫߽ߢ࡞࡯ࡁ࠲ࠛޔ‬หߓታ㛎ࠍታᣉߒߚ‫ߊోޕ‬หߓ௑ะ߇ᓧࠄࠇߚ‫ߩࠄࠇߎޕ‬⚿ᨐ߆ࠄ‫ߩߎޔ‬௑ะߪ᳓‫౒ߢ࡞࡯ࡁ࠲ࠛޔ࡞࡯ࡁ࠲ࡔޔ‬ㅢߒߡ޿ࠆߎߣ߇ࠊ߆ߞߚ‫ޕ‬(3) ෼㊂ߩ BPY Ớᐲଐሽᕈ ߎࠇ߹ߢߩ᷹ቯߪ‫ޔ‬᝝ᝒ೷ߩỚᐲߪㆡᒰߣ⠨߃ࠄࠇࠆỚᐲ᧦ઙߩ৻ὐߢ᷹ቯߒߚ‫ޕ‬᝝ᝒ೷ߩỚᐲ߇᳿߹ࠆߣ‫ޔ‬෻ᔕㅦᐲቯᢙ߆ࠄ⠨߃ߡ‫ߩߘޔ‬᝝ᝒ෻ᔕߩ
ᤨ㑆ࠬࠤ࡯࡞߇᳿߹ࠆߎߣߦߥࠆ‫ޕ‬ᓥߞߡ‫ޔ‬᝝ᝒ೷Ớᐲࠍᄌ߃ࠆߎߣߦࠃࠅኻ⽎ߩൻቇ⒳ߩ෼㊂ߩᤨ㑆ᄌൻࠍ⹏ଔߔࠆߎߣ߇ߢ߈ࠆ‫ᦨޕ‬ㄭ‫ߥ߁ࠃߩߎޔ‬⠨߃ߦၮߠ߈‫ޔ‬ቶ᷷ propanediol ਛߩṁᇦ๺㔚ሶߩᤨ㑆ᄌൻࠍࡇࠦ⑽߆ࠄࡑࠗࠢࡠ⑽ߩ▸࿐ߢ⹏ଔߒߚ [9]‫ޕ‬⿥⥃⇇⁁ᘒߢ෼㊂Ⴧട߇᷹ⷰߐࠇߚ᧦ઙߢ‫ޔ‬᝝ᝒ೷ߩỚᐲࠍᄌൻߐߖࠆߣߤߩࠃ߁ߥ⚿ᨐ߇ᓧࠄࠇࠆߩ
߆ࠍᬌ⸛ߔࠆߚ߼ߩታ㛎ࠍ⸳ቯߒߚ‫ޕ‬9MPa ߩ࿶࿑ 7 ⇣ߥࠆỚᐲߩ BPY ࠍ↪޿ߚࡔ࠲ࡁ࡯

ജ৻ቯਅߢߩ‫ޔ‬ࡔ࠲ࡁ࡯࡞ਛߩ BPY Ớᐲࠍ 0.5mM࡞ਛṁᇦ๺㔚ሶ↢ᚑ㊂ߩ᷷ᐲଐሽᕈ

߆ࠄ 50mM ߦᄌൻߐߖߡ߃ࠄࠇߚ⚿ᨐࠍ࿑ 7 ߦ␜ߔ‫ޕ‬BPY ỚᐲߩჇᄢߦኻᔕߒߡ‫ޔ‬᝝ᝒṁᇦ๺㔚ሶߩ෼㊂߇Ⴧᄢߒߡ޿ࠆߎߣ߇ࠊ߆ࠆ‫ޕ‬෼㊂ߩ⛘ኻ୯ߪỚᐲߦଐሽߔࠆ߇‫ޔ‬Ớᐲଐሽᕈߪߤߩ᷷ᐲߦ߅޿ߡ߽ᄢ߈ߥ㆑޿ߪ⷗ࠄࠇߥ޿‫ޕ‬ᒰೋ‫⇇⥃⿥ޔ‬ߢߩ෼㊂Ⴧᄢㇱಽߢߪ‫ޔ‬ᣢߦචಽ෼㊂ߪ㜞޿ߩߢ‫ࠇߎޔ‬એ਄ BPY ỚᐲࠍჇടߐߖߡ߽Ⴧᄢߔࠆߎߣ
ߪߥߊ‫ޔ‬㘻๺ߔࠆߢ޽ࠈ߁ߣᦼᓙߒߡ޿ߚ߇‫ޔ‬ታ㛎⚿ᨐߪߎߩᦼᓙߣߪోߊ⇣ߥߞߡ޿ࠆ‫ޕ‬− 16 −

JAEA-Review 2007-049(4) ṁᇦ๺㔚ሶߣ BPY ߩ෻ᔕㅦᐲቯᢙߩ᷷ᐲଐሽᕈ᷹ቯ ᝝ᝒታ㛎ࠍⴕ߁਄ߢ෻ᔕㅦᐲቯᢙߩ⹏ଔߪ᝝
ᝒ⢻⸘▚ߦߪਇนᰳߢ޽ࠆ‫ߢߎߘޕ‬ṁᇦ๺㔚ሶߣ BPY ߩ෻ᔕㅦᐲቯᢙࠍฦ᷷ᐲߢ᷹ቯߒߚ‫ޕ‬᷹ቯߦߪੑߟߩࡐࡦࡊࠍ↪޿ߡੑ⒳ߩṁᶧࠍᷙวߔࠆߎߣߦࠃࠅỚᐲࠍᄌ߃ߡ‫ޔ‬࿶ജ৻ቯߩ
9MPa ਅߢⴕߞߚ‫⚿ߩߘޕ‬ᨐࠍ࿑ 8 ߦ␜ߔ‫ޕ‬ቶ᷷ߢߪ 1.1 × 1010 M-1s-1 ߢ‫ޔ‬᷷ᐲ਄᣹ߦ઻޿෻ᔕ
ㅦᐲቯᢙߪჇടߔࠆ߇‫ߢ࠻࠶ࡠࡊࠬ࠙࠾࡟ࠕޔ‬ߪ߶߷⋥✢ࠍ␜ߒ‫ޔ‬ᵴᕈൻࠛࡀ࡞ࠡ࡯ߪ
17.8kJ/mol ߣ▚಴ߐࠇࠆ‫⁁⇇⥃⿥ޔ߇ࠈߎߣޕ‬ᘒߦ౉ࠆߣߎߩ⋥✢߆ࠄߩߕࠇ߇᣿⏕ߣߥࠆ‫ޕ‬

࿑ 8 ࡔ࠲ࡁ࡯࡞ਛṁᇦ๺㔚ሶߣ BPY ߩ෻ᔕ

BPY ߣ᳓๺㔚ሶߩ෻ᔕߪ᳓ṁᶧߢ᷹ቯߐࠇ‫ޔ‬ቶㅦᐲቯᢙߩ᷷ᐲଐሽᕈ

᷷ߢߪ 2.2 × 1010 M-1s-1 ߢ‫⇇⥃⿥ޔ‬᳓߹ߢߪ 19kJ/mol ߩ௑߈ߢ⋥✢⊛ߦჇടߔࠆ [5]‫ࡠࠝࡆ࡞࠴ࡔޕ‬࡯ࠥࡦߣ᳓๺㔚ሶߩ෻ᔕߩᵴᕈൻࠛࡀ࡞ࠡ࡯߽᷹ቯߐࠇ‫ޔ‬21.6kJ/mol ߢ߶߷หߓࠃ߁ߥ୯ߢ޽ࠆ‫ޕ‬ ⿥⥃⇇⁁ᘒਅߢߪ෻ᔕㅦᐲቯᢙߪ࿶ജ(ኒᐲ)ߦଐሽߔࠆߎߣ߇⍮ࠄࠇߡ޿ࠆ [10]‫ޕ‬245qC ߢ࿶ജࠍᄌൻߐߖߡ෻ᔕㅦᐲࠍ᷹ቯߒߚ⚿ᨐ‫ޔ‬ૐ࿶ߢߪㅦᐲቯᢙ߇Ⴧᄢߔࠆߎߣࠍ⷗޿ߛߒߚ [4]‫ޕ‬ ෻ᔕㅦᐲቯᢙߩ᷹ቯߦߪỚᐲࠍᄌ߃ߡฦ‫ߩޘ‬ᷫ⴮ㅦᐲࠍỚᐲߢࡊࡠ࠶࠻ߒߡߘߩ௑߈߆ࠄ▚಴ߔࠆ‫ޕ‬㜞᷷ߦߥࠆߣ෻ᔕ߇ㅦߊߥࠆߚ߼‫ޔ‬㜞ᤨ㑆ಽ⸃⢻ߩ᷹ቯࠪࠬ࠹ࡓ߇ਇนᰳߣߥࠆ‫ޕ‬(5) ṁᇦ๺㔚ሶ෼㊂ߩᤨ㑆ଐሽᕈ ෻ᔕㅦᐲቯᢙ߇ᓧࠄࠇߚߩߢ‫ޔ‬BPY ฦỚᐲߢߩ᝝ᝒ⢻ߪ k[BPY]ߢ⴫⃻ߢ߈‫ޔ‬෻ᔕߩࠬࡇ࡯࠼ࠍ␜
ߔ‫ߩߎޕ‬ㅒᢙߪᤨ㑆ࠍ⴫ߒ‫᧦ߩߎޔ‬ઙਅߢߩ෻ᔕ
ᤨ㑆ࠍ␜ߔ‫ޕ‬ᓥߞߡ‫ޔ‬Ớᐲࠍᄌ߃ࠆߎߣߦࠃࠅ෻
ᔕߩࠬࡇ࡯࠼ࠍᄌൻߐߖࠆߎߣ߇ߢ߈‫ࠇߙࠇߘޔ‬ߩ᝝ᝒ⢻ߩㅒᢙ߇⴫ߔᤨ㑆ߢߩ෼㊂ࠍᓧࠆߎߣ߇
ߢ߈ࠆ‫ޕ‬
 ᷹ቯߢ⹏ଔߐࠇߚṁᇦ๺㔚ሶߩ෼㊂ࠍ‫ޔ‬ฦ᷷ᐲߩ෻ᔕㅦᐲቯᢙࠍ↪޿ߡ᝝ᝒ⢻ࠍ▚಴ߒߡㅒᢙࠍ
᳞߼ߡ᝝ᝒᤨ㑆ߢࡊࡠ࠶࠻ߒߚ⚿ᨐࠍ࿑ 9 ߦ␜ߔ‫ޕ‬หߓỚᐲߢ߽᷷ᐲ਄᣹ߦኻᔕߒ෻ᔕㅦᐲቯᢙ߇Ⴧ
ടߔࠆߩߢ‫ޔ‬᝝ᝒᤨ㑆ߪ⍴ߊߥࠆ‫ޕ‬ᓥߞߡ‫ޔ‬᷷ᐲ࿑ 9 ࡔ࠲ࡁ࡯࡞ਛṁᇦ๺㔚ሶ෼㊂ߣᤨ㑆ߩ㑐ଥߩ᷷ᐲଐሽᕈ

߇㜞޿࠺࡯࠲߶ߤᤨ㑆߇⍴ߊ‫ޔ‬Ꮐߦࠪࡈ࠻ߔࠆߎߣߦߥࠆ‫ޕ‬ቶ᷷‫ޔ‬100qC‫ޔ‬200qC ߣ⏕߆ߦ⍴ᤨ㑆஥ߦ࠺࡯࠲߇ࠪࡈ࠻ߒߡ޿ࠆ‫ޕ‬245qC ߽ห᭽ߢ޽ࠆ߇‫ޔ‬෼㊂⥄૕߇Ⴧᄢߒߡ޿ࠆߩߢઁߣߪ⇣ߥߞߚ᜼േߩࠃ߁ߦ⷗߃ࠆ‫ߢߎߎޕ‬ᵈᗧߔߴ߈ߪ‫ޔ‬㐳ᤨ㑆ߢߩ෼㊂ߢ޽ࠆ‫ޕ‬㐳ᤨ㑆㗔ၞߢߪṁᇦ๺㔚ሶߩ৻ᰴߩᷫ⴮߇㗼⪺ߣߥࠅ‫ޔ‬BPY ߣߩ෻ᔕߩഀว߇ᷫዋߔࠆߩߢ‫⵬ࠍࠇߎޔ‬ᱜߒߡࡊࡠ࠶࠻ߒߚ߽ߩ
߇ታ✢ߢ␜ߒߡ޽ࠆ‫ߩࠇߕ޿ޕ‬᷷ᐲߩ࠺࡯࠲߽ G=2.1 ⒟ᐲࠍ␜ߒ‫ޔ‬᷷ᐲߦଐሽߒߥ޿‫⚿ߩߎޕ‬ᨐߪ㕖Ᏹߦ⥝๧ᷓ޿‫⺃ޕ‬㔚₸ߩૐ޿ṁᇦߢߪ⥄↱ࠗࠝࡦߩᡴ₸ߪࠝࡦࠩࠟ࡯ߩ㑐ଥᑼߢ⴫⃻ߢ߈ [11]‫ޔ‬⺃㔚₸߇ૐ޿߶ߤ⥄↱ࠗࠝࡦ෼㊂ߪᷫዋߔࠆ‫ߪߢ࡞࡯ࡁ࠲ࠛޕ‬㜞᷷ߢߩ⺃㔚₸ߩᄌൻߩႎ๔߇ߥ޿
߇‫ޔ‬᷷ᐲ਄᣹ߢᷫዋߔࠆߎߣ߇ᦼᓙߐࠇࠆߩߢ‫ࡦࠝࠗ↱⥄ޔ‬෼㊂߽ᷫዋߔࠆߎߣ߇ᦼᓙߐࠇࠆ‫ߒޕ‬߆ߒ‫⚿ޔ‬ᨐߪߘ߁ߥߞߡ޿ߥ޿‫⚿ߩߎޕ‬ᨐࠍߤߩࠃ߁ߦ⸃㉼ߔࠆ߆ߦߟ޿ߡߪਇ᣿ߥὐ߇ᄙ޿‫ޕ‬− 17 −

JAEA-Review 2007-049

4. ߹ߣ߼ ⿥⥃⇇ᵹ૕ߩ᡼኿✢෻ᔕߩ․ᓽࠍ᣿⏕ൻߔࠆߚ߼ߦ‫ޔ‬ቶ᷷߆ࠄ⿥⥃⇇⁁ᘒߩࠛ࠲ࡁ࡯࡞ਛߢߩṁᇦ๺㔚ሶߩ෼㊂ࠍ BPY ࠍ↪޿ߡ᷹ቯߒߚ‫ޕ‬ቶ᷷߆ࠄ 200qC ߹ߢߪ߶ࠎߩዋߒߛߌჇട᳇๧ߢ޽ࠆ
߇‫৻߷߶ޔ‬ቯ୯ࠍ␜ߔ‫ߦࠄߐޕ‬᷷ᐲ߇਄᣹ߔࠆߣ‫⇇⥃ޔ‬ὐߦㄭߠ޿ߚ᷷ᐲߢዋߒᷫዋߒߚᓟ‫⥃⿥ޔ‬⇇⁁ᘒߦ౉ߞߡᕆỗߥჇᄢࠍ␜ߔ‫ޕ‬250qC ߢࡇ࡯ࠢࠍ␜ߒߚᓟ‫ޔ‬ᕆỗߦᷫዋߔࠆߎߣ߇್ߞߚ‫ߎޕ‬ߩ᜼േߪᚒ‫߇ޘ‬ᣢߦ⹏ଔߒߚ᳓ṁᶧߢߩ᳓๺㔚ሶ෼㊂ߣోߊหߓߢ޽ࠆ‫ޕ‬ ߐࠄߦ‫ޔ‬ṁᇦ๺㔚ሶߣ BPY ߩ෻ᔕㅦᐲቯᢙߩ᷷ᐲଐሽᕈࠍ⿥⥃⇇⁁ᘒ߹ߢ᷹ቯߒߚ‫޿↪ࠍࠇߎޕ‬ߡ෼㊂ߣᤨ㑆ߩ㑐ଥߦࡊࡠ࠶࠻ߒߚ‫ޕ‬ࡊ࡜ࠗࡑ࡝࡯෼㊂ߪ߶߷৻ቯߢ᷷ᐲߦࠃࠄߥ޿ߎߣ߇್ߞߚ‫ޕ‬㜞᷷ߢߪ⺃㔚₸߇ᷫዋߔࠆߩߢ෼㊂ߩᷫዋ߇ᦼᓙߐࠇࠆߩߣߪ⍦⋫ߔࠆ‫ޕ‬ ߎࠇࠄߩታ㛎⚿ᨐࠍ⺑᣿ߔࠆߚ߼ߩℂ⺰⊛ࠕࡊࡠ࡯࠴߇ᦼᓙߐࠇࠆ‫ޕ‬
5. ෳ⠨ᢥ₂[1] G. Wu, Y. Katsumura, Y. Muroya, X. Li and Y. Terada; Chem. Phys. Lett., 325, 531 (2000).
[2] H. Shiraishi, G. V. Buxton and N. D. Wood; Radiat. Phys. Chem., 33, 519 (1989).
[3] G. V. Buxton and N. D. Wood; Radiat. Phys. Chem., 34, 699 (1989).
[4] M. Lin, Y. Katsumura, Y. Muroya, H. He, G. Wu, Z. Han, T. Miyazaki, and H. Kudo; J. Phys. Chem. A, 108,8287 (2004).
[5] M. Lin, Y. Katsumura, H. He, Y. Muroya, Z. Han, T. Miyazaki, and H. Kudo; J. Phys. Chem. A, 109, 2847
(2005).
[6] M. Lin, Y. Katsumura, et al.; in preparation.
[7] T. Miyazaki, M. Lin, Y. Muroya, H. Kudo, Y. Katsumura, M. Asano, and M. Yoshida; Radiat. Phys. Chem.
75, 218 (2006).
[8] N. Getoff, A. Ritter, F. Schwörer and P. Bayer; Radiat. Phys. Chem., 39, 177 (1992).
[9] M. Lin, M. Mostafavi, Y. Muroya, Z. Hana, I. Lampreb, and Y. Katsumura; J. Phys. Chem. A, 110, 11404(2006).
[10] J. A. Cline, K. Takahashi, T. W. Marin, C. D. Jonah, D. M. Bartels; J. Phys. Chem. A 106, 12260 (2002).
[11] J. Warman p.433 in The Study of Fast Processes and Transient Species by Electron Pulse Radiolysis, J. H.
Baxendale and F. Busi ed., D. Reidel Publishing Company, 1983.

− 18 −

JAEA-Review 2007-049

㧠㧚⚦⢩ᱫߦ߅ߌࠆ⚦⢩ౝዊེቭ߳ߩ᳓ᵹ౉ᯏ᭴ߩ⸃᣿
The Role of Water Flow into Subcellular Organella in Cell Death㡞ᔒ↰㧔ජ⪲㧕 ⮍Kaori Chiba-Kamoshida㧔⁛㧕↥ᬺᛛⴚ✚ว⎇ⓥᚲ ᐕ㦂ゲ↢๮Ꮏቇ⎇ⓥ࠮ࡦ࠲࡯
Age Dimension Research Center, National Institute of Advanced Industrial Science and Technology᭎ⷐ⚦⢩ౝߩᱴߤߩࠛࡀ࡞ࠡ࡯ࠍ↥↢ߔࠆ⚦⢩ౝዊེቭࡒ࠻ࠦࡦ࠼࡝ࠕߦ߅޿ߡ‫ߩߘޔ‬᭴ㅧߪᯏ⢻߿∛ᘒߣᷓ޿㑐ㅪࠍ߽ߞߡ޿ࠆ‫ߪࠕ࡝࠼ࡦࠦ࠻ࡒޕ‬ౝ⤑‫ޔ‬ᄖ⤑߆ࠄߥࠆੑ㊀⤑᭴ㅧࠍߣߞߡ߅ࠅ‫↢ޔ‬૕ߩቯᏱ⊛ߥࠛࡀ࡞ࠡ࡯↢↥ߦߪ‫⤑ߩ⾰‛ޔ‬ㅘㆊᕈߩ෩ኒߥ೙ᓮ߇㊀ⷐߥᓎഀࠍᨐߚߔ‫৻ޕ‬ᣇ‫ޔ‬᭽‫ޘ‬ߥⷐ࿃ߦࠃߞߡᒁ߈⿠ߎߐࠇࠆ‛⾰ߩ⤑ㅘㆊᕈߩ⇣⁁ߪ‫⚦ޔ‬⢩⥄りࠍᱫ߳ߣዉߊᒁ߈㊄ߦߥࠆ‫ޕ‬᳓ಽሶ߽ࠕࠢࠕࡐ࡝ࡦߣ๭߫ࠇࠆⰮ⊕⾰ߢߘߩᵹࠇࠍ೙ᓮߐࠇࠆ߇‫ߩ߳ࠕ࡝࠼ࡦࠦ࠻ࡒߢ߹ࠇߎޔ‬᳓ߩ಴౉ࠅࠍ᷹ⷰߔࠆᣇᴺߪߥ߆ߞߚ‫ޕ‬ਛᕈሶዊⷺᢔੂߪ‫↢ޔ‬૕‛⾰෸߮ࡒ࠻ࠦࡦ࠼࡝ࠕ╬ߩ⚦⢩ౝዊེቭ߇ᯏ⢻㧔ᵴᕈ㧕ࠍᜬߟṁᶧ᧦ઙߢ‫ߩߘޔ‬ᒻ⁁ߩᄌൻࠍ᷹ⷰߔࠆߎߣ߇ߢ߈ࠆ‫↢ߦࠄߐޕ‬૕ౝߦḩㆉߥߊಽᏓߔࠆ᳓⚛ߣߘߩห૏૕ߢ޽ࠆ㊀᳓⚛ࠍ᣿⏕ߦ඙೎ߢ߈ࠆߣ޿߁․ᓽߪ․╩ߔߴ߈೑ὐߢ޽ࠆ‫ޕ‬ේሶജ⎇ⓥ㐿⊒ᯏ᭴ JRR-3 ߦ⸳⟎ߐࠇߚਛᕈሶዊⷺᢔੂⵝ⟎㧔SANS-J㧕෸߮ਛᕈሶ⿥ዊ
ⷺᢔੂⵝ⟎㧔PNO㧕ࠍ૬↪ߔࠇ߫‫ޔ‬ੑ㊀⤑ߩෘߺ߆ࠄ 1µm ⒟ᐲߩࡒ࠻ࠦࡦ࠼࡝ࠕߩᄖᒻ߹ߢߩࠨࠗ
࠭ࠍ✂⟜⊛ߦ᷹ⷰߔࠆߎߣ߇ߢ߈ࠆ‫⎇ᧄޕ‬ⓥߢߪ 70%ߣ޿߁㗼⪺ߦ㜞޿Ⱞ⊕⾰฽᦭㊂ࠍᜬߟࡒ࠻ࠦ
ࡦ࠼࡝ࠕౝ⤑ߩᕈ⾰ࠍ೑↪ߒߡ‫ࠕ࡝࠼ࡦࠦ࠻ࡒޔ‬ౝ⤑᭴ㅧ߇‫߿⚛㉄ޔ‬ၮ⾰Ớᐲߩᄌൻ‫ߩ⾰⊕Ⱞ⤑ޔ‬㒖ኂ೷ߩᷝടߥߤ᭽‫ⷐߥޘ‬࿃ߢߤߩࠃ߁ߦᄌൻߔࠆ߆‫ߩߎߚ߹ޔ‬ౝ⤑ߩ᭴ㅧᄌൻߣ‫⤑ޔ‬ౝ߳ߩ᳓ߩ
ㅘㆊ߇ߤߩࠃ߁ߦ㑐ㅪߒߡ޿ࠆ߆ࠍ᷹ⷰߢ߈ࠆታ㛎♽ߩ᭴▽ࠍ⹜ߺߚ‫ޕ‬
Mitochondrion is a subcellular organella producing most of the energy necessary for living cells. The
structure consisting of double membrane, inner and outer membranes, has a close relationship with activity
and diseases. Its accurate regulation of the membrane permeability plays an important role in the homeostatic
energy production. Abnormal membrane permeability has a potential to lead to cell death. Although, eventransportation of water molecule is regulated by a specific membrane protein, aquapoline, there has not beenreported any method to monitor the water flow through the membrane. Neutron small-angle scattering allows
us to perform measurements with biological materials and subcellular organella such as mitochondria insolution under the experimental condition maintaining the activity of the biological samples. Outstanding
advantage of neutron spectroscopy is its ability to distinguish hydrogen spread over biomolecules fromdeuterium. In order to explore a new method to monitor conformational change inside mitochondria,
wide-range neutron small angle scattering data introducing two neutron spectrometers in JAEA JRR-3,
SANS-J and PNO covering not only the size for the thickness of the double membrane but also that for
isolated whole mitochondria particle, ~ 1µm was employed. Utilizing the excess protein content, 70%, in the
inner membrane of mitochondria, a new attempt was began to figure out the structure change in inner
membrane caused by the change such as in oxygen and in the substrate concentration, and to examine therelationship between the structure change and water flow through the mitochondria membrane.

− 19 −

JAEA-Review 2007-049

1. ⎇ⓥ⋡⊛ࡒ࠻ࠦࡦ࠼࡝ࠕߪ৻ߟߩ⚦⢩ౝߦᄙᢙሽ࿷ߒ‫⚦ޔ‬⢩ౝߩᱴߤߩ
ࠛࡀ࡞ࠡ࡯ࠍ↥↢ߔࠆ㊀ⷐߥ⚦⢩ౝዊེቭߢ޽ࠆ‫ߩߘޕ‬᭴ㅧߪᯏࡑ࠻࡝࠶ࠢࠬ

⢻߿∛ᘒߣᷓ޿㑐ㅪࠍ߽ߟߎߣ߇⍮ࠄࠇߡ޿ࠆާ1ި‫ޕ‬ᚒ‫ߊࠃ߇ޘ‬

ࠢ࡝ࠬ࠹

⤑㑆ㇱ૏

⍮ࠆࡒ࠻ࠦࡦ࠼࡝ࠕ௝㧔࿑ 1㧕ߪ㔚ሶ㗼ᓸ㏜ߢⷰኤߐࠇߚ߽ߩߢ‫ޔ‬
ಽሶ㊂ 1,500 ⒟ᐲߩૐಽሶߩ಴౉ࠅ߇⥄↱ߥᄖ⤑ߣ‫ߩ⾰‛ޔ‬ㅘㆊ߇෩ኒߦ೙ᓮߐࠇߚౝ⤑߆ࠄߥࠆੑ㊀⤑᭴ㅧࠍߣࠆ‫ޕ‬ౝ⤑ߦߪ↢૕ߩࠛࡀ࡞ࠡ࡯ㅢ⽻ߢ޽ࠆ ATP วᚑߦ㑐ࠊࠆⰮ⊕⾰ߥߤ߇ᄙߊ

ᄖ⤑฽߹ࠇ‫ߣ࠹ࠬ࡝ࠢޔ‬๭߫ࠇࠆ⊿⁁᭴ㅧࠍᒻᚑߒߡ޿ࠆ‫ޕ‬ౝ⤑ߩⰮ⊕⾰฽᦭㊂ߪ 70㧑ࠍභ߼‫⚦ޔ‬⢩⤑߿ߘߩઁߩ⚦⢩ౝዊེቭߩ⤑ߣᲧセߔࠆߣᩰᲑߦ㜞޿୯ߦߥߞߡ޿ࠆ‫ⴊߪ⚛㉄ޕ‬ᶧߦࠃߞߡฦ⚦ ࿑ 1 ࡒ࠻ࠦࡦ࠼࡝ࠕ

⢩ߦㆇ߫ࠇ‫ߩߘޔ‬ᱴߤ߇ࡒ࠻ࠦࡦ࠼࡝ࠕౝ⤑ߩ৻ߟߩⰮ⊕⾰ߢᶖ⾌ߐࠇࠆ㧔๭ๆᵴᕈ㧕‫⾰⊕Ⱞߩߎޕ‬ߪ⤑㔚૏ߩૐ޿ࡒ࠻ࠦࡦ࠼࡝ࠕౝㇱ㧔ࡑ࠻࡝࠶ࠢࠬ㧕߆ࠄ⤑㔚૏ߩ㜞޿ౝᄖ⤑㑆ㇱ૏߳ᱜ㔚⩄ࠍᜬߟࡊࡠ࠻ࡦࠍㆇ߱‫ߡߞ૶ࠍࡦ࠻ࡠࡊߩߎޕ‬หߓߊౝ⤑ߦሽ࿷ߔࠆ೎ߩⰮ⊕⾰ߢ ATP ߇วᚑߐࠇࠆ‫ޕ‬ߎߩࠃ߁ߦ‫ߩࠕ࡝࠼ࡦࠦ࠻ࡒޔߪࠬ࠮ࡠࡊ↢↥࡯ࠡ࡞ࡀࠛߚߞ૶ࠍ⚛㉄ޔ‬ౝ⤑ߦᝌ౉ߐࠇߚ๭ๆ㎮ߣ๭߫ࠇࠆ⤑Ⱞ⊕⾰ߩ㑆ࠍ‫ޔ‬㔚ሶ߿ࡊࡠ࠻ࡦߥߤࠍฃߌᷰߒߒߥ߇ࠄㆀⴕߐࠇࠆ‫৻ߩߎߪ‛↢ޕ‬ㅪߩᵹࠇࠍ⺞▵ߔࠆߎߣߢ‫⚦ޔ‬⢩ౝߢࠛࡀ࡞ࠡ࡯߇ᔅⷐߦߥߞߚᤨߦᔅⷐߥߛߌߩ㉄⚛ࠍᶖ⾌ߒ‫ޔ‬ᔅⷐߥߛߌߩ ATP ࠍวᚑߔࠆ㧔๭ๆ⺞▵⢻㧕‫ࠍ⚛㉄ޕ‬ᶖ⾌ߔࠆߣ޿߁෻ᔕߘߩ߽ߩߪ೨ㅀߩߣ߅ࠅ৻
ߟߩⰮ⊕⾰ߩᯏ⢻ߢ޽ࠆ‫߼ߚߩߘޕ‬వߦㅀߴߚࡒ࠻ࠦࡦ࠼࡝ࠕߩੑ㊀⤑᭴ㅧ߇ㇱಽ⊛ߦ⎕უߐࠇߡ߽๭ๆᵴᕈߪ଻ᜬߐࠇࠆ‫ޕ‬ߒ߆ߒ๭ๆ⺞▵⢻ߪ୘‫ߩ⾰⊕Ⱞߩޘ‬ᵴᕈߦ㆖⦡߇ߥ޿ߣ޿߁ߛߌߢߥߊ‫ޔ‬ࡒ࠻ࠦࡦ࠼࡝ࠕߩ⤑᭴ㅧ߇ቢోߢߥߌࠇ߫චಽߥᵴᕈࠍ␜ߐߥ޿‫⎇ᧄޕ‬ⓥߪࡒ࠻ࠦࡦ࠼࡝ࠕߩ⚦⢩ౝዊེቭߣߒߡߩᵴᕈߢ޽ࠆ๭ๆ⺞▵⢻ߩᄌൻߣ‫ޔ‬ᶐㅘ࿶ߩᄌൻ߿‛⾰ߩ಴౉ࠅߥߤߦ઻ߞߡ⿠ߎ
ࠆࡒ࠻ࠦࡦ࠼࡝ࠕߩ᭴ㅧᄌൻߩ㑐ㅪࠍ⺞ߴࠆߚ߼ߩᣂߚߥᣇᴺࠍ㐿⊒ߔࠆߎߣࠍ⋡⊛ߣߔࠆ‫ޕ‬
2. ⎇ⓥౝኈ࡜࠶࠻ߩ⢄⤳߆ࠄන㔌ߒߚࡒ࠻ࠦࡦ࠼࡝ࠕߩࠨࠗ࠭ߪ 1µm ⒟ᐲߢ޽ࠆ‫⃻ޕ‬࿷߹ߢߩߣߎࠈ‫ޔ‬ṁᶧਛߦ޽ࠆᄖᒻ 1µm ⒟ᐲߩࡒ࠻ࠦࡦ࠼࡝ࠕߩ࡝ࠕ࡞࠲ࠗࡓߥౝㇱ᭴ㅧᄌൻࠍ⋥ធࡕ࠾࠲࡯ߢ߈ࠆᚻ
ᴺߪઁߦߪߥ޿‫⎇ᧄޕ‬ⓥߩᒰ㕙ߩ⋡ᮡߪԘਛᕈሶዊⷺᢔੂᴺߢߪⰮ⊕⾰ߣ⢽⾰߇⇣ߥࠆᢔੂ⢻ࠍ␜ߔ੐ࠍ೑↪ߒߡ‫ޔ‬70%ߣ޿߁ථ⿧ߒߚⰮ⊕⾰฽㊂ࠍᜬߟࡒ࠻ࠦࡦ࠼࡝ࠕౝ⤑߆ࠄߩਛᕈሶᢔੂࠍㆬ
ᛯ⊛ߦ᛽಴ߔࠆߎߣߢ޽ࠆ‫ߡߒߘޕ‬ԙߘߩ᭴ㅧ߇ࡒ࠻ࠦࡦ࠼࡝ࠕߩ๭ๆᵴᕈߩ⁁ᘒ߿㉄⚛Ớᐲߩૐਅ‫⚦ޔ‬⢩ᱫߩᒁ߈㊄ߣߥࠆ⮎೷ߩᷝടߦࠃࠅߤߩࠃ߁ߦᄌൻߔࠆ߆ࠍ‫߇ࠕ࡝࠼ࡦࠦ࠻ࡒޔ‬ᯏ⢻ࠍᜬߟṁᶧ᧦ઙਅߢ᷹ⷰߔࠆߎߣߢ޽ࠆ‫ߩࠄࠇߎޕ‬ታ㛎ߪ࡜࠶࠻ߩ⢄⤳߆ࠄන㔌ߒߚࡒ࠻ࠦࡦ࠼࡝ࠕࠍ
↪޿ߡⴕ߁߇‫ޔ‬዁᧪⊛ߦߪԚ⚵❱ߩਛߦ޽ࠆ⁁ᘒߢࡒ࠻ࠦࡦ࠼࡝ࠕߩౝ⤑᭴ㅧࠍ᷹ⷰߢ߈ࠆᚻᴺߦ
⊒ዷߐߖߚ޿ߣ⠨߃ߡ޿ࠆ‫ߩࠄࠇߎޕ‬ታ㛎ߦᔅⷐߥࡒ࠻ࠦࡦ࠼࡝ࠕ⹜ᢱ෸߮ਛᕈሶዊⷺᢔੂⵝ⟎ߩ
⹜ᢱⅣႺਔ㕙ߦߟ޿ߡᬌ⸛ࠍⴕߞߚ‫ޕ‬ࡒ࠻ࠦࡦ࠼࡝ࠕߩන㔌෸߮ᵴᕈ᷹ቯታ㛎ߦߟ޿ߡߪᵿᧄᢅ㇢వ↢ࠍߪߓ߼ߣߔࠆ⥄ᴦක⑼ᄢቇ
කቇㇱ↢ൻቇᢎቶߩ⊝᭽ߩߏදജߩ߽ߣߦᬌ⸛ࠍⴕߞߚ‫ߚ޿↪ࠍࠕ࡝࠼ࡦࠦ࠻ࡒޕ‬ታ㛎ߢᦨೋߦ໧
㗴ߣߥߞߚߩߪ⹜ᢱߩ㞲ᐲߢ޽ߞߚ‫ߦ․ޕ‬ਛᕈሶ⿥ዊⷺᢔੂߪᢔੂᒝᐲ߇ᒙ޿ߚ߼‫ޔ‬᷹ቯߦᤨ㑆߇߆߆ࠆ‫ޕ‬ᒰೋ࡜࠶࠻ߩ⢄⤳ߩࡒ࠻ࠦࡦ࠼࡝ࠕ⹜ᢱߪ‫ޔ‬න㔌ᓟ 4 ᤨ㑆ߒ߆๭ๆ⺞▵⢻߇଻ሽߐࠇߥ޿
ߣ޿߁ߎߣߢ޽ߞߚ‫ߕ߹ߢߎߘޕ‬ਛᕈሶታ㛎ߩ࠲ࠗࡓࠬࠤ࡯࡞ߢ᭴ㅧ߿๭ๆ⺞▵ᵴᕈߦ໧㗴߇಴ࠆ߆ߤ߁߆ߦߟ޿ߡᬌ⸛ࠍⴕߞߚ‫ޕ‬− 20 −

JAEA-Review 2007-049

ᤨ㑆න૏ߩ⹜ᢱߩ㞲ᐲ߇㊀ⷐߢ‫ࠕ࡝࠼ࡦࠦ࠻ࡒޔ‬න㔌ᓟߢ߈ࠆߛߌㄦㅦߦਛᕈሶታ㛎ࠍ㐿ᆎߒߥߌࠇ߫ߥࠄߥ޿ߣ޿߁⁁ᴫߢ‫ޔ‬ᣣᧄේሶജ⎇ⓥ㐿⊒ᯏ᭴ߩవ┵ၮ␆⎇ⓥ࠮ࡦ࠲࡯ ᒝ⋧㑐⿥ಽሶ♽ߩ᭴▽ߣ㓏ጀ㑆ᖱႎવ㆐ᯏ᭴ߩ⸃᣿ࠣ࡞࡯ࡊ㧔⃻ ᒝ⋧㑐⿥ಽሶ⎇ⓥࠣ࡞࡯ࡊ㧕ߩో㕙⊛ߥߏදജߩ߽ߣߦ‫ޔ‬ᐔᚑ 18 ᐕᐲߩᦨ⚳ࡑࠪࡦࠨࠗࠢ࡞ߦਛᕈሶዊⷺ㧔SANS-J㧕‫ޔ‬෸߮⿥ዊⷺᢔੂ㧔PNO㧕
㧔SANS-J 2 ᣣ‫ޔ‬PNO 4 ᣣ㧕ታ㛎ࠍⴕ߁ߎߣ߇ߢ߈ߚ‫↢ޕ‬૕⹜ᢱߩਛᕈሶᢔੂታ㛎ߢ߹ߕ᛼ߐ߃ߡ
߅ߊᔅⷐ߇޽ࠆߩߪ‫ߩߤޔ‬⒟ᐲߩ㊂ߩ⹜ᢱߢ‫ޔ‬චಽߥᒝᐲߩᢔੂ࠺࡯࠲߇ߣࠇࠆ߆ߣ޿߁ߎߣߢ޽
ࠆ‫ޕ‬ਛᕈሶᢔੂታ㛎ߢߪ‫ߩߎߕ߹ޔ‬ὐߩ࠴ࠚ࠶ࠢࠍⴕߞߚ‫ޔߚ߹ޕ‬ṁᇦߩ᳓ߦ฽߹ࠇࠆシ᳓⚛ߦ↱᧪ߔࠆ㕖ᐓᷤᕈᢔੂߩᓇ㗀ߦߟ޿ߡ߽ᬌ⸛ࠍⴕߞߚ‫ߩߘޕ‬ᓟ⎇ⓥᦼ㑆⚳ੌ߹ߢߩ㑆ߦ⹜ᢱⅣႺߦ㑐ߔࠆᬌ⸛ࠍⴕ޿‫ޔ‬᷹ቯ↪ߩ᷷⺞࠴ࡖࡦࡃ࡯ߩᡷ⦟ߥߤࠍⴕߞߡ㗂޿ߚ‫ޕ‬
3. ⎇ⓥ⚿ᨐ(1) ਛᕈሶዊⷺᢔੂታ㛎↪ࡒ࠻ࠦࡦ࠼࡝ࠕ⹜ᢱߩ⺞⵾ਛᕈሶዊⷺᢔੂታ㛎ߢߪ‫ߕ߹ޔ‬ᒻߩឥߞߚ⹜ᢱࠍ↪޿ߡታ㛎ࠍᆎ߼ࠆߎߣߢ‫ߩߘޔ‬ᓟߩ⮎೷ᛩਈ߿ታ㛎᧦ઙߩᄌൻ߇ࡒ࠻ࠦࡦ࠼࡝ࠕߩᐔဋ᭴ㅧߦ෸߷ߔ
ᄌൻࠍࠃࠅᗵᐲࠃߊⷰኤߔࠆߎߣ߇ߢ߈ࠆߣ⠨߃ߚ‫ࡒޕ‬࠻ࠦࡦ࠼࡝ࠕࠍ⚵❱߆ࠄขࠅ಴ߔ႐ว‫⚦ޔ‬⢩ࠍߔࠅẩߒߡ᛽಴ߔࠆߚ߼‫ޔ‬ᔃ⤳ߥߤߩ⎬޿⚵❱ߦᲧߴߡ⢄⤳ߩࠃ߁ߥᨵࠄ߆޿⚵❱߆ࠄขࠅ಴ߔᣇ߇‫ࠅࠃޔ‬ဋ৻ߥ᭴ㅧߩ
ࡒ࠻ࠦࡦ࠼࡝ࠕࠍ⺞⵾ߔࠆߎߣ߇ߢ߈ࠆ‫⎇ᧄޕ‬ⓥߢߪਛᕈሶታ㛎ࠍⴕ߁ߚ߼‫↢ߩઁޔ‬ൻቇ⊛ߥ᷹ቯᚻᴺߦᲧߴߡᄙߊߩࡒ࠻ࠦࡦ࠼࡝ࠕ⹜ᢱ߇ᔅⷐߦߥࠆ‫৻ߢߎߘޕ‬඘޽ߚࠅᄙߊߩࡒ࠻ࠦࡦ࠼࡝ࠕ⹜ᢱࠍ᛽಴ߢ߈ࠆ࡜࠶࠻ߩ⢄⤳ࠍ↪޿ࠆߎߣߦߒߚ‫ޕ‬1Ǵm

࿑ 2 ߪන㔌ࡒ࠻ࠦࡦ࠼࡝ࠕߦ⢻േ⊛ߦࡠ࡯࠳ࡒࡦ 123
ࠍߣࠅߎ߹ߖ‫Ⱟޔ‬శ㗼ᓸ㏜ߢⷰኤߒߚ౮⌀ߢ޽ࠆ‫ޕ‬ṁᶧ࿑ 2 න㔌ࡒ࠻ࠦࡦ࠼࡝ࠕߩ㗼ᓸ㏜௝

ਛߢ᷹ቯߒߡ޿ࠆߚ߼‫ޔ‬౮⌀ࠍ᠟ᓇߒߡ޿ࠆ㑆߽ࡒ࠻ࠦࡦ࠼࡝ࠕ߇⒖േߒߡߒ߹޿‫ޔ‬௝߇߷߿ߌߡߒ߹ߞߚ‫߹ޕ‬ߚ౒ὶὐ㗼ᓸ㏜ࠍ૶↪ߒߡ޿ࠆߚ߼‫ޔ‬ᷓߐߩ⇣ߥࠆ૏⟎ߦ޽ࠆࡒ࠻ࠦࡦ࠼࡝ࠕߩࠨࠗ࠭ߪዊߐߊ౮
ߞߡ޿ࠆ߇‫ޔ‬ᷓߐᣇะߦࠬࠠࡖࡦߒߡߺࠆߣ⚂ 1µm ߩ߶߷ဋ৻ߥ⃿ᒻࠍߒߡ޿ࠆߎߣ߇ࠊ߆ߞߚ‫ޕ‬↢૕‛⾰ߩਛᕈሶዊⷺᢔੂታ㛎ߢߪ‫ޔ‬ṁᇦߢ޽ࠆ᳓ਛߩシ᳓⚛↱᧪ߩ㕖ᐓᷤᕈᢔੂߦࠃࠆࡃ࠶ࠢࠣ
࡜࠙ࡦ࠼ߩ਄᣹ࠍᛥ߃ࠆߚ߼‫ޔ‬ṁᇦࠍ㊀᳓ߦ⟎߈឵߃ߡ᷹ቯࠍⴕ߁ߎߣ߇ᄙ޿‫ߢߎߘޕ‬ṁᇦਛߩ᳓ࠍ㊀᳓ߦ⟎឵ߒߡ‫ޔ‬ห᭽ߥ᷹ⷰࠍⴕߞߚߣߎࠈ‫ޔ‬㊀᳓ਛߢ߽චಽߦⰯశ⦡⚛߇ขࠅㄟ߹ࠇ‫ࠦ࠻ࡒޔ‬ࡦ࠼࡝ࠕߩᒻ⁁‫ߦ౒࠭ࠗࠨޔ‬シ᳓ṁᇦߩ႐วߣห᭽ߩ⚿ᨐ߇ᓧࠄࠇߚ‫ޕ‬(2) න㔌ࡒ࠻ࠦࡦ࠼࡝ࠕߩᵴᕈ᷹ቯ
↢૕‛⾰ߩਛᕈሶ㧔⿥㧕ዊⷺᢔੂታ㛎ߦߪ‫ޔ‬ㅢᏱᢙᤨ㑆߆ࠄ৻ᣣߩᤨ㑆߇߆߆ࠆߚ߼‫ߕ߹ޔ‬න㔌ࡒ࠻ࠦࡦ࠼࡝ࠕߩ㐳ᤨ㑆቟ቯᕈࠍ⏕⹺ߔࠆᔅⷐ߇޽ߞߚ‫ߚ߹ޕ‬㊀᳓ਛߢߪ‫ߣ࠻࠶࡜ޔ‬ห᭽ߦࡒ࠻ࠦ
ࡦ࠼࡝ࠕࠍ᦭ߔࠆ㉂Უߩ↢⢒߇⪺ߒߊㆃߊߥࠆߎߣ߆ࠄ‫ߩࠕ࡝࠼ࡦࠦ࠻ࡒޔ‬ᵴᕈߩૐਅ߇੍᷹ߐࠇ
ߚ‫ߢߎߘޕ‬᳖਄ߢඨᣣએ਄଻ሽߒߚࡒ࠻ࠦࡦ࠼࡝ࠕ‫ߚ߹ޔ‬න㔌ᓟߔߋߦṁᇦࠍ㊀᳓ߦ⟎឵ߒߚࡒ࠻
ࠦࡦ࠼࡝ࠕߩᵴᕈ᷹ቯࠍⴕ޿‫ޔ‬න㔌ᓟ߹߽ߥߊߩᵴᕈߣᲧセߒߚ‫ߩࠕ࡝࠼ࡦࠦ࠻ࡒޕ‬ᵴᕈ᷹ቯߦߪ
ࡒ࠻ࠦࡦ࠼࡝ࠕߩ⤑᭴ㅧߩቢోᕈࠍ⹏ଔߔࠆ๭ๆ⺞▵⢻ࠍ↪޿ߚ‫ޕ‬ታ㛎ߢߪ㉄⚛㔚ᭂࠍ↪޿ߡࡒ࠻ࠦࡦ࠼࡝ࠕṁᶧਛߩ㉄⚛Ớᐲߩᤨ㑆ᄌൻࠍ᷹ⷰߒ‫ࠄ߆ߎߎޔ‬᳞߼ߚ๭ๆㅦᐲ߇ ATP ߩේᢱߣߥࠆ

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JAEA-Review 2007-049

ADP ߩỚᐲߩᄌൻߦࠃߞߡ⺞▵ߐࠇࠆᐲว޿ࠍ᷹ቯߒߚ‫ޕ‬᳖਄ߢන㔌ᓟ㐳ᤨ㑆଻ሽߒߚࡒ࠻ࠦࡦ࠼
࡝ࠕ߿‫ޔ‬ṁᇦࠍ㆙ᔃߢ㊀᳓♽ߦ⟎឵ߒߚࡒ࠻ࠦࡦ࠼࡝ࠕߩᵴᕈߪ‫ޔ‬න㔌ᓟߔߋߩࡒ࠻ࠦࡦ࠼࡝ࠕ⹜
ᢱߦᲧߴߡ๭ๆ⺞▵⢻߇ૐਅߔࠆ߽ߩߩ‫ޔ‬ቢోߦߥߊߥߞߡߪ޿ߥ޿ߎߣ߇ࠊ߆ߞߚ‫ޕ‬(3) න㔌ࡒ࠻ࠦࡦ࠼࡝ࠕߩਛᕈሶዊⷺᢔੂ
ᦨೋߩਛᕈሶᢔੂታ㛎ߪ‫ޔ‬Ყセ⊛㐳ᤨ㑆๭ๆ⺞▵ᵴᕈࠍ⛽ᜬߢ߈ࠆߎߣ߇␜ߐࠇߚ 4͠ߢⴕ޿ߚ
߆ߞߚ‫ߢߎߘޕ‬ዊⷺᢔੂታ㛎ࠍⴕ߁೨ߦ‫ޔ‬SANS-J‫ޔ‬PNO ਔᣇߩ᷹ቯ࠮࡞ࠍ㐳ᤨ㑆ߦਗ਼ߞߡ♖ᐲࠃ
ߊ 4͠ߦ଻ߡࠆߎߣ‫࡞࠮ޔߚ߹ޔ‬ቶౝࠍࠟࠬ⟎឵‫࡞࠮ߪ޿ࠆ޽ޔ‬๟ㄝߦ᷹ⷰⓨ᳇ࠍㅍࠆߎߣߦࠃߞ
ߡ‫ޔ‬ૐ᷷ߢ߽᷹ቯ࠮࡞ߩ⓹ߦ⚿㔺߇⿠ߎࠄߥ޿ߎߣࠍ⏕⹺ߒߚ‫ޕ‬
࿑ 3 ߪ࡜࠶࠻৻඘ಽߩࡒ࠻ࠦࡦ࠼࡝ࠕࠍ↪޿ߚਛᕈሶᢔੂ࠺࡯࠲ߢ޽ࠆ‫ޕ‬
࿑ߢߪ SANS-J ෸߮ PNO
ߩታ㛎࠺࡯࠲ࠍߟߥ޿ߢ⴫␜ߒߡ޿ࠆ‫ޕ‬٤ߪ㊀᳓‫߇ٌޔ‬シ᳓ṁᇦਛߢߩ࠺࡯࠲ߢ޽ࠆ‫ᧄޕ‬ታ㛎ߩᦨೋߦ‫ޔ‬4͠ߢ଻ሽߐࠇߚන㔌ࡒ࠻ࠦࡦ࠼࡝ࠕ
ߢ‫ޔ‬ᢔੂ࠺࡯࠲ߦᓇ㗀ࠍ෸߷ߔ᭴ㅧߩ⚻ᤨᄌൻ߇⿠ߎࠄߥ޿ߎߣࠍ⏕⹺ߔࠆᔅⷐ߇޽
ߞߚ‫੹ޕ‬࿁ߪ᷹ቯᤨ㑆߇㕖Ᏹߦ㒢ࠄࠇߡ޿ߚߚ߼‫ޔ‬Ყセ⊛⍴ᤨ㑆ߢ᷹ቯߢ߈ࠆ SANS-Jߢߩዊⷺ㗔ၞߩ᷹ቯࠍ৻ᤨ㑆න૏ߢⴕ޿‫ޔ‬ᢔੂᦛ✢ߩ⚻ᤨᄌൻࠍ᷹ⷰߒߚ‫ޕ‬ߘߩ⚿ᨐ‫ޔ‬12 ᤨ㑆એ਄ߦਗ਼ߞߡᢔੂᦛ✢ߦᄌൻߪߺ
ࠄࠇߥ޿ߎߣ߇␜ߐࠇߚߚ߼‫ޔ‬࿑ 3 ߦߪᤨಽഀߒߡ᷹ቯߒߚ࠺࡯࠲ࠍ⿷ߒวࠊߖߡ⴫
␜ߒߡ޽ࠆ‫ޕ‬৻ᣇ‫੹ޔ‬࿁ⴕߞߚਛᕈሶ⿥ዊⷺᢔੂታ㛎ߢߪ‫ޔ‬৻ߟߩ⹜ᢱߩ᷹ቯߦ⚂ 24 ᤨ㑆߆ߌߡ޿ࠆ‫ߩٌࠅ߹ߟޕ‬シ᳓ਛߩ᷹ቯ߆ࠄ٤ߩ㊀᳓ਛߩ᷹ቯ߹ߢߦ 24 ᤨ㑆߇⚻ㆊߒߡ޿ࠆ
ߎߣߦߥࠆ߇‫⿥ޔ‬ዊⷺ㗔ၞߩਔ⠪ߩᢔੂᦛ࿑ 3 ࡒ࠻ࠦࡦ࠼࡝ࠕߩਛᕈሶᢔੂ࠺࡯࠲

✢ߦ߽ᄢ߈ߥᄌൻߪ⷗ࠄࠇߥ߆ߞߚ‫ޕ‬ߎߩዊⷺᢔੂ࠺࡯࠲ߦߪ‫ޔ‬ᚒ‫ᦼ߇ޘ‬ᓙߒߡ޿ߚⷙೣ⊛ߥࠢ࡝ࠬ࠹᭴ㅧߦ↱᧪ߔࠆࡇ࡯ࠢ߇᷹ⷰߐ
ࠇߡ޿ߥ޿‫ޕ‬ᢎ⑼ᦠߢ㚔ᨴߺᷓ޿ࠢ࡝ࠬ࠹᭴ㅧߪ‫ߩ⚛㉄ޔ‬ᰳਲߒߚ⚵❱ౝߩࡒ࠻ࠦࡦ࠼࡝ࠕߩ㔚㗼௝ߢ᷹ⷰߐࠇࠆ߽ߩߢ޽ࠅ‫⼾ߩ⚛㉄ޔ‬ንߥ╬ᒛᶧਛߢන㔌ߒߚࡒ࠻ࠦࡦ࠼࡝ࠕߢߪ‫ޔ‬ౝ⤑ߣᄖ⤑ߩ⤑㑆⣧ߩᐢ߇ߞߚ᭴ㅧߦᄌൻߒߡߒ߹߁‫ᧄޔ߼ߚߩߎޕ‬ታ㛎ߩ⹜ᢱߢߪࠨࠗ࠭ߩឥߞߚࠢ࡝ࠬ࠹᭴
ㅧ߇᷹ⷰߐࠇߥ߆ߞߚ߽ߩߣᕁࠊࠇࠆ‫ޕ‬
4. ߹ߣ߼
ࡒ࠻ࠦࡦ࠼࡝ࠕߩࠃ߁ߦන㔌ߔࠆߎߣߢ᭴ㅧ߇ᄌൻߒߡߒ߹߁⹜ᢱߪ‫ߩ❱⚵᧪ᧄޔ‬ਛߦ޽ࠆ⁁ᘒߢ‫ޔ‬᭴ㅧ‫ޔ‬ᯏ⢻ߩ᷹ቯࠍⴕ߃ࠆߎߣ߇ᦸ߹ߒ޿‫⎇ᧄޕ‬ⓥߪ߹ߕ‫ޔ‬ᩭ߿૛⸘ߥ᭴ㅧⰮ⊕⾰ߩߥ޿න⚐ߥ♽ߢ޽ࠆන㔌ࡒ࠻ࠦࡦ࠼࡝ࠕߢ┙ߜ਄ߍࠆ߇‫ޔ‬዁᧪⊛ߦߪ⚦⢩ౝߦᢙජ୘ሽ࿷ߔࠆߣ޿߁ࡒ࠻ࠦ
ࡦ࠼࡝ࠕߩ․ᓽࠍ↢߆ߒߚ in situ ߩታ㛎ߦ⊒ዷߐߖߚ޿ߣ⠨߃ߡ޿ࠆ‫ߩࠕ࡝࠼ࡦࠦ࠻ࡒޕ‬ᄖᒻߦߟ޿ߡߪ㗼ᓸ㏜ߢ߽᷹ⷰน⢻ߢ޽ࠆ߇‫ޔ‬ᵴᕈߩ޽ࠆ⁁ᘒߢߘߩౝ⤑᭴ㅧߩᄌൻࠍṁᶧਛߢ᷹ቯߢ߈ࠆ
ᣇᴺߪ੹ߩߣߎࠈߥ޿‫ࠕ࡝࠼ࡦࠦ࠻ࡒޔߢߎߘޕ‬ౝ⤑ߩ㜞޿Ⱞ⊕⾰ኒᐲࠍ೑↪ߒߡ‫࠻ࠬ࡜࠻ࡦࠦޔ‬ࡃ࡝ࠛ࡯࡚ࠪࡦᴺߢౝ⤑ߩ᭴ㅧᖱႎࠍ᛽಴ߒࠃ߁ߣ⹜ߺߡ޿ࠆ‫⎇ޕ‬ⓥᦼ㑆ߩᓟඨߪේሶἹ߇஗ᱛߒ

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ߡ޿ߚߚ߼‫ޔ‬Ḱ஻ߩߚ߼ߩၮ␆ታ㛎ߣߒߡߎࠇ߹ߢߦන㔌ࡒ࠻ࠦࡦ࠼࡝ࠕ߆ࠄౝ⤑ᚑಽߩ♖⵾ࠍⴕߞߚ‫੹ޕ‬ᓟⴕ߁ਛᕈሶᢔੂታ㛎ߢߪ‫ߩߎߕ߹ޔ‬න㔌ౝ⤑ߩᐔဋᢔੂ㐳ኒᐲࠍ᳞߼ࠆ‫ߩߎޕ‬୯ࠍ⋡቟ߦਛᕈሶዊⷺᢔੂ࠺࡯࠲ਛߩౝ⤑↱᧪ߩᚑಽࠍታ㛎⊛ߦ᛽಴ߔࠆᣇᴺࠍ⏕┙ߢ߈ࠇ߫‫ޔ‬ਣߏߣߩၭ
㙃⚦⢩޽ࠆ޿ߪ∛ℂ⚵❱ࠍߘߩ߹߹ਛᕈሶᢔੂታ㛎ߩ⹜ᢱߣߒߡ↪޿‫ߩࠕ࡝࠼ࡦࠦ࠻ࡒޔ‬ౝ⤑᭴ㅧߩᖱႎࠍ᛽಴ߔࠆߎߣ߽น⢻ߢ޽ࠆߣ⠨߃ࠆ‫ޕ‬
5. ⻢ㄉ
ᧄ⎇ⓥߦ߅ߌࠆਛᕈሶዊⷺᢔੂታ㛎ߪᣣᧄේሶജ⎇ⓥ㐿⊒ᯏ᭴‫ޔ‬వ┵ၮ␆⎇ⓥ࠮ࡦ࠲࡯‫ޔ‬ᒝ⋧㑐⿥ಽሶ♽ߩ᭴▽ߣ㓏ጀ㑆ᖱႎવ㆐ᯏ᭴ߩ⸃᣿ࠣ࡞࡯ࡊ㧔⃻ ᒝ⋧㑐⿥ಽሶ⎇ⓥࠣ࡞࡯ࡊ㧕ߩጤἑ⵨Ꮧ
ඳ჻‫ޔ‬Ⴧ੗෹⟤ඳ჻‫ޔ‬ਛᕈሶ⿥ዊⷺᢔੂታ㛎ߪጊญᄢテඳ჻ߩߏදജߦࠃࠅⴕ߁ߎߣ߇ߢ߈߹ߒߚ‫ޕ‬߹ߚหࠣ࡞࡯ࡊߩᯅᧄ┻ᴦవ↢‫ޔ‬ዊᴰᥓඳ჻ߦߪ⾆㊀ߥߏഥ⸒ࠍ㗂߈߹ߒߚ‫⹜ࠕ࡝࠼ࡦࠦ࠻ࡒޕ‬ᢱߦ㑐ߔࠆታ㛎ߢߪ‫⥄ޔ‬ᴦක⑼ᄢቇ‫ޔ‬කቇㇱ‫ޔ‬ᯏ⢻↢ൻቇᢎቶߩᵿᧄᢅ㇢వ↢‫ޔ‬㆙⮮ੳมవ↢෸߮ᢎቶຬߩ⊝᭽ߦᄢᄌ߅਎⹤ߦߥࠅ߹ߒߚ‫ߦߎߎޕ‬ᗵ⻢ߩᗧࠍ⴫ߒ߹ߔ‫ޕ‬
6. ෳ⠨ᢥ₂[1] ᣂࡒ࠻ࠦࡦ࠼࡝ࠕቇ ౒┙಴ ᩣᑼળ␠ ౝᶏ⠹ᘡ࡮੗਄ᱜᐽ ⋙ୃ

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JAEA-Review 2007-049

㧡㧚㜞㔚㔌㊀ࠗࠝࡦࡆ࡯ࡓࠍ೑↪ߒߚᓸዊὶὐන⦡ X ✢శḮ㐿⊒ߩߚ߼ߩၮ␆⎇ⓥ
Studies for the Development of a Micro-focus Monochromatic X-ray Source with
Making Use of a Highly Charged Heavy Ion Beamਛ᧛ାⴕ 1‫ޔ‬ศ቟ା㓶 2‫ޔ‬ᷰㄝ⵨ᢥ 3‫ޔ‬ਛጊ੫ 2
Nobuyuki Nakamura1, Nobuo Yoshiyasu2, Hirofumi Watanabe3, Ryo Nakayama2
1㔚᳇ㅢାᄢቇ࡟࡯ࠩ࡯ᣂ਎ઍ⎇ⓥ࠮ࡦ࠲࡯

Institute for Laser Science, The University of Electro-Communications2㔚᳇ㅢାᄢቇ㊂ሶ࡮‛⾰Ꮏቇ⑼Department of Applied Physics and Chemistry, The University of Electro-Communications
3⑼ቇᛛⴚᝄ⥝ᯏ᭴㧛CREST

CREST, Japan Science and Technology Agency᭎ⷐ㜞㔚㔌㊀ࠗࠝࡦࡆ࡯ࡓ߇࿕૕⴫㕙ߦᾖ኿ߔࠆ㓙ߩ X ✢᡼಴ㆊ⒟ࠍ೑↪ߒߚ‫ߊోޔ‬ᣂߒ޿ᓸዊὶὐන
⦡ X ✢శḮߩ㐿⊒ࠍ⋡ᜰߒߡ‫ߩߘޔ‬ၮ␆⎇ⓥࠍⴕߞߚ‫ޔߕ߹ޕ‬ᓸዊὶὐߣߔࠆߚ߼ߦ‫ࡇࡖࠠࠬ࡜ࠟޔ‬࡜࡝࡯ࠍ↪޿ߚ㜞㔚㔌ࠗࠝࡦߩ㓸᧤ᴺࠍ㐿⊒ߒߚ‫ޕ‬ᰴߦන⦡ᕈࠍ⺞ߴࠆߚ߼ߦ‫ޔ‬㜞㔚㔌ࠗࠝࡦ߇࿕૕
⴫㕙ߦᾖ኿ߒߚ㓙ߦ⊒ߔࠆ X ✢ߩࠬࡍࠢ࠻࡞ࠍ᷹ቯߒߚ‫ޕ‬㜞㔚㔌ࠗࠝࡦߣ࿕૕⴫㕙ߣߩⴣ⓭ߦ߅޿ߡᒻᚑߐࠇࠆਛⓨේሶߩ፣უㆊ⒟ߢߪ‫ޔ‬K Ზߩⓨሹߪ X ✢᡼಴ߦࠃࠅၒ߼ࠄࠇࠆ⏕₸߇ 100%ߢ޽ࠆߎߣߥߤ߇⏕⹺ߐࠇߚ‫ޕ‬
We propose a new scheme for a micro-focus monochromatic X-ray source using a focused highly charged ion
beam colliding with a solid surface. When highly charged ion approaches a surface, many electrons are captured
into the ion and the so-called hollow atom is produced. The hollow atom will decay by emitting X-rays before
and after hitting the surface. Such X-rays do not contain any contribution from bremsstrahlung, so thatmonochromatic X-rays can be obtained by using proper filters.
For the first step of realizing the proposed scheme, an ion focusing system with a glass capillary has beendeveloped. In order to study the monochromaticity of the emission, X-ray spectra from hollow atoms producedin the collisions between highly charged heavy ions and several surfaces have been observed.
1. ⎇ⓥ⋡⊛
ᧄ⎇ⓥߪ‫ޔ‬㜞㔚㔌㊀ࠗࠝࡦࡆ࡯ࡓࠍ೑↪ߒߚోߊᣂߒ޿ X ✢శḮߩ㐿⊒ࠍ⋡ᜰߒߡߘߩၮ␆⎇ⓥࠍ
ⴕ߁߽ߩߢ޽ࠆ‫ޕ‬ૐㅦ㜞㔚㔌ࠗࠝࡦ߇࿕૕⴫㕙ߦⴣ⓭ߔࠆߣ‫ޔ‬࿕૕⴫㕙߆ࠄᄙᢙߩ㔚ሶࠍᅓ߁ߎߣߦࠃࠅਛⓨේሶ㧔ࠗࠝࡦ㧕ߣ๭߫ࠇࠆᄙ㊀ബ⿠ࠗࠝࡦ߇ᒻᚑߐࠇ‫ߩߘޔ‬፣უㆊ⒟ߦ߅޿ߡ X ✢ࠍ᡼಴ߔࠆߎߣ߇⍮ࠄࠇߡ޿ࠆ‫⎇ᧄޕ‬ⓥߪ‫ ߩߎޔ‬X ✢᡼಴ㆊ⒟ࠍᓸዊὶὐන⦡ X ✢శḮߦᔕ↪ߔࠆߎߣࠍ⋡ᜰߔ‫⃻ޕ‬࿷‫ޔ‬᳢↪ߩ X ✢Ḯߣߒߡߪ㜞ㅦ㔚ሶⴣ᠄ߦࠃࠅ㊄ዻ࿕૕⹜ᢱߩ․ᕈ X ✢ࠍᓧࠆ X ✢▤߇ᐢߊ↪޿ࠄࠇߡ޿ࠆ߇‫ޔ‬਄ㅀߩ㜞㔚㔌㊀ࠗࠝࡦߩ X ✢᡼಴ㆊ⒟ߦߪ‫ޔ‬ᓥ᧪ߩ X ✢▤ߦߪߥ޿એਅߩࠃ߁ߥ
․㐳߇޽ࠆ‫ޕ‬− 25 −

JAEA-Review 2007-049

࡮೙േ᡼኿ߦࠃࠆㅪ⛯ X ✢߇ߥߊ‫߷߶ޔ‬න⦡ߩ X ✢ࠍᓧࠆߎߣ߇಴᧪ࠆ‫ޕ‬․ߦ‫Ⱟޔ‬శ෼㊂ߩᄢ߈ߥ K Ზሹࠍᜬߟ᳓⚛᭽‫ߩ⵻ޔ‬㊀ర⚛ࠗࠝࡦࠍ↪޿ࠆߎߣߢ‫ޔ‬K ✢ߦ㓸ਛߒߚࠬࡍࠢ࠻࡞߇ᓧࠄࠇࠆ߽ߩߣ੍ᗐߐࠇࠆ‫ޕ‬ᓸዊὶὐන⦡ X ✢శḮߩ㐿⊒ߪ‫ߕࠄߥߺߩࠣࡦࠫ࡯ࡔࠗޔ‬ක≮ಽ㊁ߦ߅ߌࠆᔕ↪ߦ߅޿ߡ߽㕖Ᏹߦᒝߊᦸ߹ࠇߡ޿ࠆ‫ޕ‬න⦡ X ✢ࠍᓧࠆߚ߼ߦߪ‫ޔ‬᡼኿శߩ೑↪
ߩઁ‫ޔ‬㜞ㅦ☸ሶ✢ᾖ኿ߦࠃࠆ࿕૕⹜ᢱ߆ࠄߩ․ᕈ X ✢ࠍ૶↪ߔࠆᣇᴺ߽⠨߃ࠄࠇࠆ߇‫⟎ⵝ߽ࠇߕ޿ޔ‬߇Ꮒᄢߥ‛ߣߥࠄߑࠆࠍᓧߥ޿‫৻ޕ‬ᣇ‫ޔ‬ૐㅦ㜞㔚㔌ࠗࠝࡦḮߪᲧセ⊛ዊဳߢ࠹࡯ࡉ࡞࠻࠶ࡊࠨࠗ࠭ߩ
ⵝ⟎߇น⢻ߢ޽ࠆ‫ޕ‬࡮ࠗࠝࡦߩේሶ⇟ภࠍᄌ߃ࠆߎߣߢ᭽‫ߥޘ‬ᵄ㐳ߩ X ✢ࠍ⥄࿷ߦᓧࠆߎߣ߇น⢻‫ޕ‬X ✢▤ߢߪ X ✢ࠍ᡼಴ߔࠆߩߪ㊄ዻ⹜ᢱߢ޽ࠆ߇‫ޔ‬ᾲ⽶⩄ߥߤߩ೙㒢߆ࠄ૶↪ߢ߈ࠆ㊄ዻ⹜ᢱߪ೙
㒢ߐࠇ‫ޔ‬ᓥߞߡᓧࠄࠇࠆ X ✢ߩᵄ㐳߽೙㒢ߐࠇࠆ‫৻ޕ‬ᣇ‫ޔ‬ਛⓨේሶߩ፣უߦࠃࠆ X ✢ߪర⚛ࠍ⥄↱ߦㆬ߱ߎߣ߇ߢ߈ࠆߩߢ᭽‫ߥޘ‬ᵄ㐳ߩ X ✢ࠍᓧࠆߎߣ߇น⢻ߣߥࠆ‫ޕ‬ᧄ⎇ⓥߩࠃ߁ߦૐㅦ㜞㔚㔌ࠗࠝࡦߩⴣ⓭ㆊ⒟ࠍ X ✢శḮߦ೑↪ߒࠃ߁ߣߔࠆឭ᩺ߪ↳⺧⠪ߩ⍮ࠆ㒢ࠅߢㆊ෰ߦ໑৻ሽ࿷ߔࠆ[1]‫⎇ᧄࠄ߇ߥߒ߆ߒޕ‬ⓥߪએਅߩὐߢㆊ෰ߩឭ᩺ߣᄢ߈ߊ⇣ߥࠆ․㐳ࠍ᦭ߒߡ޿ࠆ‫ޕ‬
㧔㧝㧕nm ࠨࠗ࠭ߩᓸዊὶὐశḮࠍ⋡ᜰߔ㧔ㆊ෰ߩឭ᩺ߢߪᢙච µm ⒟ᐲ㧕‫ޔߦ߼ߚߩߘޕ‬ㄭᐕߦࠊ߆ߦ⎇ⓥ߇ⴕࠊࠇࠆࠃ߁ߦߥߞߡ߈ߚ⛘✼૕ࠠࡖࡇ࡜࡝࡯ߦࠃࠆࠗࠝࡦ෼᧤ᛛⴚࠍ㐿⊒ߔࠆ‫౉ޕ‬ญߩౝᓘ߇Ǿ1mm ⒟ᐲߢ಴ญߩౝᓘࠍ 1µm એਅߦ⛉ߞߚࠃ߁ߥࠠࡖࡇ࡜࡝࡯ߦࠗࠝࡦࠍㅢㆊߐߖࠆߣノᐲߩჇടߒߚ෼᧤ࡆ࡯ࡓ߇ᓧࠄࠇࠆߎߣ߇ႎ๔ߐࠇߡ޿ࠆ[2]‫ߩߎޕ‬ലᨐࠍ೑↪ߔࠆߎߣߢ㜞ノᐲᓸዊὶὐࠗࠝࡦࡆ࡯ࡓࠍᓧࠆߎߣ߇น⢻ߢ޽ࠆߣᦼᓙߐࠇࠆ߇‫ޔ‬ߎߩࠃ߁ߥ⎇ⓥߪᆎ߹ߞߚ߫߆ࠅߢ޽ࠅ‫ޔ‬
޿߹ߛℂ⸃ߐࠇߡ޿ߥ޿⃻⽎߇ᄙߊ‫ޔ‬ᛛⴚ⊛ߦ⏕┙ߒߡ޿ࠆߎߣߪ૗৻ߟߥ޿‫⎇ᧄޔߦࠄߐޕ‬ⓥߢ⋡⊛ߣߔࠆ㜞㔚㔌㊀ర⚛ࠗࠝࡦߦࠃࠆ⎇ⓥߪߎࠇ߹ߢߦ଀߇ߥߊ‫ޔ‬㜞ノᐲᓸዊὶὐࡆ࡯ࡓࠍᓧࠆߚ߼ߩ
ᦨㆡ᧦ઙࠍታ㛎ߦࠃࠅᓧࠆᔅⷐ߇޽ࠆ‫ޕ‬㧔㧞㧕Bi ⒟ᐲ߹ߢߩ㊀ర⚛ᄙଔࠗࠝࡦࠍ೑↪ߔࠆߎߣߦࠃࠅᢙ 10keV ߹ߢߩశḮࠍ⋡ᜰߔ㧔ㆊ෰ߩឭ᩺ߢߪ Ar ࠍ↪޿ߚ 3keV ߩ X ✢㧕‫ߥ߁ࠃߩߘޔ߼ߚߩߘޕ‬㜞㔚㔌ࠗࠝࡦߣ࿕૕⴫㕙ߣߩⴣ⓭ㆊ⒟ߦ߅ߌࠆਛⓨේሶ↢ᚑㆊ⒟߅ࠃ߮ߘߩ፣უㆊ⒟ࠍ⺞ߴࠆ‫⎇ᧄޕ‬ⓥߢߪ㔚᳇ㅢାᄢቇߦ⸳⟎ߐࠇߚ EBITဳࠗࠝࡦḮ㧔Tokyo-EBIT㧕ࠍ↪޿ߡ↢ᚑߐࠇࠆ㜞㔚㔌㊀ర⚛ࠗࠝࡦࠍ࿕૕⴫㕙ߦⴣ⓭ߐߖ‫ߩߘޔ‬㓙ߦ᡼಴ߐࠇࠆ X ✢ߩࠬࡍࠢ࠻࡞ࠍ᷹ⷰߔࠆ‫ޕ‬᭽‫ߥޘ‬㔚⩄⁁ᘒࠍᜬߟࠗࠝࡦࠍ‫ޔ‬ඨዉ૕‫ޔ‬㊄ዻߥߤ᭽‫ߥޘ‬࿕૕⹜ᢱߦᾖ኿ߒ‫ ߩߘޔ‬X ✢᡼಴ㆊ⒟ࠍ᣿ࠄ߆ߦߔࠆ‫ߢ߹ࠇߎޕ‬Ყセ⊛㔚⩄⁁ᘒߩૐ޿シర⚛ࠗࠝࡦߦ㑐ߒߡߪ‫ޔ‬࿕૕⴫㕙ߣߩⴣ⓭ߦ߅ߌࠆ᡼಴ X ✢ࠍ⺞ߴࠆ⎇ⓥ߇ㆊ෰ߦ߽ⴕࠊࠇߡ߅ࠅ‫ߩߘޔ‬ᯏ᭴ߪᲧセ⊛⦟ߊℂ⸃ߐࠇߡ޿ࠆ‫⎇ᧄޔࠄ߇ߥߒ߆ߒޕ‬ⓥߩࠃ߁ߦ K Ზߦሹࠍᜬߟ᳓⚛᭽‫ߩ⵻ޔ‬㊀ర⚛ࠗࠝࡦࠍ↪޿ߚ⎇ⓥߪή޿ߣ⸒ߞߡ߽ㆊ⸒ߢߪߥ޿‫ޕ‬
2. ⎇ⓥౝኈ
2-1. ࠟ࡜ࠬࠠࡖࡇ࡜࡝࡯ߦࠃࠆࠗࠝࡦ㓸᧤ᛛⴚߩ㐿⊒ࠟ࡜ࠬࠠࡖࡇ࡜࡝࡯ߦࠃࠆࠗࠝࡦ㓸᧤ߪ‫ޔ‬ℂൻቇ⎇ⓥᚲߩࠣ࡞࡯ࡊߦ߅޿ߡᲧセ⊛ૐଔᢙߩࠗࠝࡦ
ߦኻߒߡ⎇ⓥ଀߇ႎ๔ߐࠇߡ޿ࠆ߇[2]‫ޔ‬ᚒ‫ࠅࠃߪޘ‬㜞ଔᢙߩࠗࠝࡦߦኻߔࠆ㓸᧤ᛛⴚࠍ㐿⊒ߔࠆߚ߼‫ޔ‬ࠟ࡜ࠬࠠࡖࡇ࡜࡝࡯ࠍ⁛⥄ߦ⵾૞ߒߚ‫⵾ޕ‬૞ᣇᴺߪ‫ޔ‬Ꮢ⽼ߩࠟ࡜ࠬ▤ࠍടᾲߒߥ߇ࠄട㊀ࠍ߆ߌࠆߎ
ߣߦࠃࠅᒁ߈િ߫ߔߣ޿߁න⚐ߥ߽ߩߢ޽ࠆ߇‫࡯࡝࡜ࡇࡖࠠߩߺᦸޔ‬ᒻ⁁ࠍᓧࠆߚ߼ߦᦨㆡߥടᾲ᷷
ᐲ‫ޔ‬ടᾲᣇᴺߥߤࠍ⷗޿಴ߔߚ߼ߦ⹜ⴕ㍲⺋ࠍ➅ࠅ㄰ߒߚ‫ޕ‬ᰴߦ‫⵾ޔ‬૞ߒߚࠠࡖࡇ࡜࡝࡯ߦኻߒߡࠗࠝࡦㅢㆊታ㛎ࠍⴕߞߚ‫ࡦࠝࠗޕ‬㌂߆ࠄߩ㧝ଔࠗࠝࡦࠍࠠࡖ
ࡇ࡜࡝࡯ㅢㆊߐߖ‫ߩߘޔ‬ㅢㆊ㊂ߩ⚻ᤨᄌൻߥߤࠍ⷗ࠆߎߣߦࠃࠅ‫ߩࡦࠝࠗޔ‬㓸᧤ലᨐࠍ⺞ߴߚ‫ޕ‬− 26 −

JAEA-Review 2007-049

2-2. 㜞㔚㔌ࠗࠝࡦߣ࿕૕⴫㕙ߣߩⴣ⓭ߦ߅޿ߡᒻᚑߐࠇࠆਛⓨේሶ߆ࠄߩ X ✢ࠬࡍࠢ࠻࡞ߩ᷹ⷰ
㔚᳇ㅢାᄢቇߦ⸳⟎ߐࠇߚ㜞㔚㔌ࠗࠝࡦḮ Tokyo-EBIT (Electron Beam Ion Trap)ࠍ↪޿ߡ↢ᚑߐࠇߚ㜞㔚㔌ࠗࠝࡦࡆ࡯ࡓࠍ H ⚳┵ Si ߿ W ߥߤߩ࿕૕⴫㕙ߦⴣ⓭ߐߖ‫ޔ‬ᒻᚑߐࠇࠆਛⓨේሶ߆ࠄߩ X ✢ࠬࡍࠢ࠻࡞ࠍ Si(Li)ᬌ಴ེࠍ↪޿ߡ᷹ቯߒߚ‫ޕ‬㜞㔚㔌ࠗࠝࡦ౉኿ߢߪ‫ޔ‬࿕૕⴫㕙߆ࠄ᡼಴ߐࠇࠆ⤘ᄢߥ㧞ᰴ㔚ሶࠍหᤨߦᬌ಴ߔࠆߎߣߢࠗࠝࡦߩ౉኿ࠍᬌ⍮ߔࠆߎߣ߇ߢ߈ࠆߚ߼‫ޔ‬᡼಴ߔࠆ X ✢ߩᒝᐲࠍ౉኿ࠗࠝࡦᢙߦኻߒߡⷙᩰൻߒ‫ޔ‬ਛⓨේሶ፣უߦ߅ߌࠆⰯశ෼㊂ࠍᓧߚ‫ޕ‬
3. ⎇ⓥ⚿ᨐ
3-1. ࠟ࡜ࠬࠠࡖࡇ࡜࡝࡯ߦࠃࠆࠗࠝࡦ㓸᧤ᛛⴚߩ㐿⊒࿑㧝ߦᧄ⎇ⓥߢ⵾૞ߒߚࠟ࡜ࠬࠠࡖࡇ࡜࡝࡯ࠍ␜ߔ‫ޕ‬࿑ߦ⷗ࠄࠇࠆࠃ߁ߦ‫ޔ‬ടᾲ᷷ᐲ߿ടᾲᣇᴺߥ
ߤࠍㆡቱ⺞ᢛߔࠆߎߣߢ‫ ߘࠃ߅߅ޔ‬500nm ߣ޿߁ᓸዊᓘࠍ᦭ߔࠆࠠࡖࡇ࡜࡝࡯߽⵾૞ߔࠆߎߣ
ߦᚑഞߒߚ‫ޕ‬ߎࠇࠄߩࠠࡖࡇ࡜࡝࡯ߦࠗࠝࡦ㌂߆ࠄߩ㧝ଔࠗࠝࡦࠍㅢㆊߐߖ‫ޔ‬ㅢㆊࠗࠝࡦᒝᐲߩ⚻ᤨᄌൻࠍ⺞ߴߚ⚿ᨐࠍ࿑ 2 ߦ␜ߔ‫ޕ‬࿑ߦ␜ߐࠇߚࠃ߁
ߦ‫ࠍࡦࠝࠗߦ࡯࡝࡜ࡇࡖࠠޔ‬ᛂߜㄟࠎߛ⋥ᓟ㧔t=0㧕ߩᤨὐߢߪࠗࠝࡦߩㅢㆊߪ߶ߣࠎߤ⏕⹺ߔࠆߎߣ߇಴᧪ߥ޿߇‫ᤨޔ‬㑆ߩ⚻ㆊߣߣ߽ߦ
ᓢ‫ߦޘ‬ㅢㆊࠗࠝࡦߩᒝᐲ߇Ⴧടߒߡ޿ࠆߎߣ߇
ಽ߆ࠆ‫ߪࠇߎޕ‬ᰴߩࠃ߁ߦ⺑᣿ߐࠇࠆ‫ޔߕ߹ޕ‬ࠗࠝࡦ౉኿⋥ᓟߦߪ‫ߦ࡯࡝࡜ࡇࡖࠠ߇ࡦࠝࠗޔ‬ኻߒߡᢳ߼ߦ౉኿ߒߡ޿ࠆߎߣߦࠃࠅ‫ޔ‬ᐞ૗ቇ⊛ߦࠠࡖࡇ࡜࡝࡯ࠍㅢㆊߔࠆߎߣ߇಴᧪ߡ޿ߥ
޿ߣ⠨߃ࠄࠇࠆ‫࡝࡜ࡇࡖࠠߪࡦࠝࠗޔࠅ߹ߟޕ‬࡯ౝოߦⴣ⓭ߒߡ޿ࠆ߽ߩߣ⠨߃ࠄࠇࠆ‫߆ߒޕ‬࿑ 1 ᧄ⎇ⓥߦ߅޿ߡ⵾૞ߒߚࠟ࡜ࠬࠠࡖࡇ࡜࡝࡯‫ޕ‬㧔਄㧕ࠠࡖࡇ࡜࡝࡯ో᥊‫ޕ‬㧔Ꮐਅ㧕ࠠࡖࡇ
࡜࡝࡯వ┵ߩ SEM ౮⌀ߩ଀‫ޕ‬㧔ฝਅ㧕ห᭽ߦ
SEM ౮⌀ߢ޽ࠆ߇‫ޔ‬వ┵߇ࠨࡉࡒࠢࡠࡦࠨࠗ
࠭ߦߥߞߡ޿ࠆߎߣ߇⏕⹺ߢ߈ࠆ‫ޕ‬ߒߥ߇ࠄᤨ㑆߇⚻ㆊߔࠆߦߟࠇߡ‫ޔ‬ౝო߇ࠗࠝ
ࡦ౉኿ߦࠃࠅᏪ㔚ߔࠆࠃ߁ߦߥࠆ‫ޕ‬Ꮺ㔚㊂߇޽ࠆ৻ቯߩ㊂ߦ೔㆐ߒߚᓟߦᦝߦࠗࠝࡦ߇౉኿ߔࠆߣ‫ޔ‬Ꮺ㔚ߒߚ㔚⩄ߣߩ෻⊒ߦࠃࠅოߦⴣ⓭ߖߕߦ෻኿ߐࠇ‫ࠍ࡯࡝࡜ࡇࡖࠠߢ₸⏕ࠆ޽ޔ‬ㅢㆊߔࠆࠃ߁ߦߥ
ࠆ‫ޕ‬Ꮺ㔚㊂‫ޔ‬Ꮺ㔚㗔ၞߩჇടߣߣ߽ߦߎߩࠃ߁ߥലᨐ߽Ⴧടߔࠆߚ߼‫ᤨޔ‬㑆ߣߣ߽ߦࠗࠝࡦㅢㆊ㊂߇Ⴧടߒߡ޿ߊ‫ߥ߁ࠃߩߎޕ‬௑ะߪౣ⃻ᕈ⦟ߊ᷹ⷰߔࠆߎߣ߇ߢ߈‫౉ޔ‬኿ࠗࠝࡦ߇ࠠࡖࡇ࡜࡝࡯ߦࠃࠅ
ࠟࠗ࠼࡮㓸᧤ߐࠇߡ޿ࠆߣ⠨߃ࠆߎߣ߇ߢ߈ࠆ‫ޕ‬3-2. 㜞㔚㔌ࠗࠝࡦߣ࿕૕⴫㕙ߣߩⴣ⓭ߦ߅޿ߡᒻᚑߐࠇࠆਛⓨේሶ߆ࠄߩ X ✢ࠬࡍࠢ࠻࡞ߩ᷹ⷰ
[3,4]᳓⚛᭽࡛࠙⚛ࠗࠝࡦ㧔I52+㧕ࠍ᳓⚛⚳┵ࠪ࡝ࠦࡦ⴫㕙ߦᾖ኿ߒߚ㓙ߦ᡼಴ߐࠇࠆ X ✢ࠬࡍࠢ࠻࡞ࠍ࿑ 3ߦ␜ߔ‫ⷰޕ‬᷹ߐࠇߡ޿ࠆ X ✢ߪోߡ౉኿ࠗࠝࡦ‫ߩ⚛࡛࠙ߜࠊߥߔޔ‬㜞㔚㔌ࠗࠝࡦ߇⴫㕙߆ࠄ㔚ሶࠍ᝝₪ߔࠆߎߣߦࠃࠅᒻᚑߐࠇࠆਛⓨේሶ߆ࠄߩ X ✢ߢ޽ࠆ‫ޕ‬5keV ઃㄭߦ⷗ࠄࠇࠆߩߪ L ✢‫ޔ‬30keV 㗔ၞߦ⷗ࠄࠇࠆߩߪ K ✢ߢ޽ࠆ‫੍ޕ‬ᗐߐࠇߚࠃ߁ߦ‫ߦ࡞࠻ࠢࡍࠬޔ‬೙േ᡼኿ߦࠃࠆ X ✢ߪߥߊ‫ࡍࠬ✢ޔ‬ࠢ࠻࡞ߣߥߞߡ޿ࠆߎߣ߇ಽ߆ࠆ‫ߩߣࡦࠗ࡜ߩઁߦ․ޕ‬㊀ߥࠅߩዋߥ޿ K-Į㧔29keV ઃㄭ㧕✢ߦኻߒߡߪ‫ࠍࡦࠗ࡜ߩઁޔ‬ㆡᒰߥࡈࠖ࡞࠲࡯ࠍ↪޿ߡ㒰෰ߔࠆߎߣߢ‫ޔ‬ᓥ᧪ߩ X ✢ḮߦᲧߴ㕖Ᏹߦන⦡ᕈߦ
ఝࠇߚ X ✢Ḯߣߥࠅᓧࠆߎߣ߇␜ߐࠇߚ‫ ߩߎޕ‬X ✢ߩᒝᐲࠍ౉኿ߒߚࠗࠝࡦᢙߢⷙᩰൻߒ‫ⷰޔ‬᷹┙૕

− 27 −

JAEA-Review 2007-049

ⷺߥߤࠍ⠨ᘦߔࠆߎߣߢ‫⛘ޔ‬ኻ⊛ߥ X ✢෼㊂ࠍ K ✢‫ޔ‬L ✢‫ޔ‬M ✢ߩߘࠇߙࠇߦߟ޿ߡᓧߚ‫ޕ‬ߘߩ⚿ᨐࠍ࿑ 4 ߦ␜ߔ‫ޕ‬࿑߆ࠄಽ߆ࠆࠃ߁ߦ‫ޔ‬᳓⚛᭽ࠗࠝࡦߢߪࠗࠝࡦ㧝୘ᒰߚࠅ㧝୘ߩK-X ✢ࠍ᡼಴ߒ‫ࡦࠝࠗߪߢࡦࠝࠗ⵻ޔ‬㧝୘ᒰߚࠅ㧞୘ߩ K-X ✢ࠍ᡼಴ߔࠆߎߣ߇ಽ߆ߞ
ߚ‫ޔࠅ߹ߟޕ‬㜞㔚㔌ࠗࠝࡦ㧙࿕૕⴫㕙ⴣ⓭ߦࠃࠅᒻᚑߐࠇߚਛⓨේሶߩ቟ቯൻㆊ⒟ߦ߅޿
ߡ‫ޔ‬K Ზⓨሹࠍၒ߼ࠆ㓙ߦߪ⥄േ㔚㔌ߪ⿠ߎࠄߕ‫ޔ‬X ✢᡼኿߇ 100%ߩ⏕₸ߢ⿠ߎࠆߎߣ

࿑ 2 ࠠࡖࡇ࡜࡝࡯ࠍㅢㆊߒߚࠗࠝࡦߩᒝᐲ
ߩ⚻ᤨᄌൻ‫ޕ‬᷹ቯ㐿ᆎ⋥ᓟߦߪࠗࠝࡦߩㅢㆊ
ߪ߶ߣࠎߤ⹺߼ࠄࠇߥ޿߇‫ᤨޔ‬㑆ߣ౒ߦㅢㆊ
ࠗࠝࡦ㊂߇Ⴧ߃ߡ޿ߊߎߣ߇ಽ߆ࠆ‫ޕ‬߇ಽ߆ߞߚ‫ޕ‬ᮡ⊛ߩ㆑޿ߦࠃࠅ X ✢ࠬࡍࠢ࠻࡞ߦᄙዋ㆑޿߇⷗ࠄࠇߚ߇‫ޔ‬਄⸥௑ะߪᮡ⊛ߦଐࠄߕ⏕߆߼ࠄࠇߚ‫⚛࡛࠙ޕ‬⒟ᐲߩ㊀ర⚛

ߦߥࠆߣⰯశ෼㊂߇ᄢ߈ߊߥࠆߎߣߪ৻⥸ߦ⍮ࠄࠇߡ޿ࠆߎߣߢ޽ࠆ߇‫ޔ‬ਛᕈߩ࡛࠙⚛ߩ႐วߪߎߩ
K ᲖⓨሹߦኻߔࠆⰯశ෼㊂ߪ⚂ 90%ߢ޽ࠆ‫ޕ‬㜞㔚㔌ࠗࠝࡦߩ႐วߦߪߎࠇ߇ 100%ߣߥࠆߎߣߪᄢᄌ
⥝๧ᷓ޿໧㗴ߢ޽ࠅ‫੹ޔ‬ᓟࠃࠅ⹦⚦ߥ⎇ⓥ߇ᦸ߹ࠇࠆߣߎࠈߢ޽ࠆ‫ޕ‬
4. ߹ߣ߼

2.0࿕૕ᮡ⊛㜞㔚㔌㊀ࠗࠝࡦࡆ࡯ࡓࠍ೑↪ߒߚోߊᣂߒ޿

ߚ߼ߩࠟ࡜ࠬࠠࡖࡇ࡜࡝࡯ࠍ⥄૞ߒ‫ߩߘޔ‬㓸᧤

L series
᡼಴X✢

1.0

Si
(L
i)

ߚ‫ޔߕ߹ޕ‬ᓸዊ㜞㔚㔌ࠗࠝࡦࡆ࡯ࡓࠍ↢ᚑߔࠆ

1.5

Photon/Ion/keVX ✢శḮߩ㐿⊒ࠍ⋡ᜰߒߡߘߩၮ␆⎇ⓥࠍⴕߞ

I52+ + H/Si㜞㔚㔌ࠗࠝࡦ

K series0.5ലᨐࠍ⏕⹺ߒߚ‫ޔߚ߹ޕ‬Tokyo-EBIT ߢ↢ᚑߐࠇࠆᭂ߼ߡଔᢙߩ㜞޿㜞㔚㔌ࠗࠝࡦߣ࿕૕⴫㕙ߣ0.0ߩⴣ⓭ߦ߅޿ߡ᡼಴ߐࠇࠆX ✢ߩࠬࡍࠢ࠻࡞ࠍ

5

10

15

20

25

30

35

40

X-ray Energy (keV)ߘߩ⚿ᨐ‫ޔ‬ㆡᒰߥࡈࠖ࡞࠲࡯ࠍ↪޿ࠆߎߣߢ‫ޔ‬
ᓥ᧪ߩX✢Ḯߦߪή޿න⦡ᕈߦఝࠇߚX✢Ḯߣߥࠅᓧࠆߎߣ߇⏕⹺ߢ߈ߚ‫ޕ‬ᦨᓟߦ‫⋡⚳ᦨޔ‬ᮡߢ޽ࠆ X ✢Ḯታᯏߦࠃࠅㄭ
޿ᒻߢ⹜㛎ࠍⴕ߁ߴߊ‫ࠍ࡯࡝࡜ࡇࡖࠠޔ‬ㅢㆊߒߚࠗࠝࡦࠍ࿕૕⴫㕙ߦᾖ኿ߒ‫ࠄ߆ߎߘޔ‬᡼಴ߐࠇࠆ X ✢ߩ᷹ⷰࠍ⹜ߺߚ‫ޕ‬࿑ 5 ߦߘߩⵝ⟎౮⌀ࠍ␜ߔ‫ޕ‬
ᱷᔨߥ߇ࠄ⃻⁁ߦ߅޿ߡ X ✢ࠬࡍࠢ࠻࡞ࠍᓧ
ࠆߎߣߦᚑഞߒߡ޿ߥ޿߇‫੹ޔ‬ᓟߎߩⵝ⟎ࠍ↪

࿑ 3 ᳓⚛᭽࡛࠙⚛ࠗࠝࡦࠍ᳓⚛⚳┵ࠪ࡝ࠦࡦ⴫㕙ߦᾖ኿ߒߚ㓙ߩ X ✢ࠬࡍࠢ࠻࡞‫ޕ‬
X-ray emission yield (photon/ion)᷹ⷰߒ‫ޔ‬
శḮߣߒߡ⠨߃ߚ㓙ߩන⦡ᕈࠍ⺞ߴߚ‫ޕ‬㪢㩷㪯㪄㫉㪸㫐
㪣㩷㪯㪄㫉㪸㫐
㪤㩷㪯㪄㫉㪸㫐

2
1.5
1
0.5
0
30

35

40

45

50

55

q

޿ߡ‫ޔ‬X ✢ࠬࡍࠢ࠻࡞ߩ᷹ቯߩઁ‫ࡦࠝࠗޔ‬ὶὐࠨࠗ࠭ߩ᷹ቯࠍⴕ߁੍ቯߢ޽ࠆ‫ޕ‬2.5

࿑ 4 ࡛࠙⚛ࠗࠝࡦࠍ᳓⚛⚳┵ࠪ࡝ࠦࡦ⴫㕙ߦᾖ኿ߒߚ㓙ߩ X ✢ߩ෼㊂‫ޕ‬ᮮゲߪ౉኿ࠗࠝ
ࡦߩଔᢙ‫ޕ‬− 28 −

JAEA-Review 2007-049

࿑ 5 ࠠࡖࡇ࡜࡝࡯ࠍㅢㆊߒߚࠗࠝࡦ߆ࠄ᡼಴ߐࠇ
ࠆ X ✢ࠍ᷹ⷰߔࠆታ㛎ⵝ⟎‫ޕ‬EBIT ߆ࠄߩ㜞㔚㔌ࠗࠝࡦࡆ࡯ࡓࠍ㕒㔚ဳ஍ะེߢᦛߍߚᓟߦࠠࡖࡇ࡜
࡝࡯ߦ౉኿ߔࠆ‫ࠍ࡯࡝࡜ࡇࡖࠠޕ‬ㅢㆊߒߚࠗࠝࡦ߇
Be ⓹ߦⴣ⓭ߒߚ㓙ߦ᡼಴ߔࠆ X ✢ࠍ Ge ᬌ಴ེߢ᷹

ࡆ࡯ࡓ
ࠗࠝ ࡦ
㜞㔚㔌

ࠠࡖ
ࡇ࡜
࡝࡯

Geᬌ಴ེ
Geᬌ಴ེ
Be⓹
Be⓹

ቯߔࠆ‫ޕ‬EBIT

5. ෳ⠨ᢥ₂
ާ1ިR. E. Marrs, D. H. Schneider, and J. W. McDonald, Rev. Sci. Instrum 69 (1998) 204.
ާ2ިT. Ikeda et al., Appl. Phys. Lett. 89 (2006) 163502.
ާ3ި*H. Watanabe et al., Phys. Rev. A 74 (2006) 042901.
ާ4ި*H. Watanabe et al, Phys. Rev. A, submitted.
*ᧄ⎇ⓥᚑᨐߦߟ޿ߡ౏⴫ߒߚ⺰ᢥ− 29 −

JAEA-Review 2007-049

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JAEA-Review 2007-049

㧢㧚㕖ᐔⴧဳⶄᢙ Į ✢᡼಴ in vivo ࠫࠚࡀ࡟࡯࠲࡯㧦227Th-EDTMP ࠍ↪޿ߚ
ォ⒖ᕈ㛽⣲≌ᴦ≮ᴺߩ㐿⊒Development of the Method for Treatment for Bone Metastasis by Using
Disequilibrium-type Alpha Particle Emitting in Vivo Generator: 227Th-EDTMP
㣐ጊᐘା 1‫ޔ‬ዊᎹᢙ㚍 2‫ޔ‬ਃ㗡⡨᣿ 3‫ޔ‬ᄤ㊁⦟ᐔ 1
Kohshin Washiyama1, Kazuma Ogawa2, Toshiaki Mitsugashira3, Ryohei Amano1
1㊄ᴛᄢቇᄢቇ㒮කቇ♽⎇ⓥ⑼Graduate school of Medical Sciences, Kanazawa University
2㊄ᴛᄢቇቇ㓙⑼ቇታ㛎࠮ࡦ࠲࡯

Advanced Science Research Center, Kanazawa University3

᧲ർᄢቇ㊄ዻ᧚ᢱ⎇ⓥᚲ

Institute for Materials Research, Tohoku University᭎ⷐ Į ✢᡼಴ᩭ⒳ߪૐ LET ߣ⍴޿㘧⒟ߣ޿߁ Į ✢ߩ․ᓽ߆ࠄォ⒖ᕈ㛽⣲≌ߩᴦ≮↪ࠕࠗ࠰࠻࡯ࡊߣߒ
ߡᵈ⋡ߐࠇߡ޿ࠆ‫ߦ⊛⇣․ޕ‬㛽ߦ㓸Ⓧߔࠆ㕖ᐔⴧဳⶄᢙ Į ✢᡼಴᡼኿ᕈක⮎ຠ 227Th-EDTMP ࠍ੃߇ࠎ⚦⢩ MRMT-1 ࠍ⒖ᬀߒߚォ⒖ᕈ㛽⣲≌ࡕ࠺࡞࡜࠶࠻ߦ 225kBq/kg ߩỚᐲߢᛩਈߒᴦ≮ലᨐߩᬌ⸽
ࠍⴕߞߚ‫ޕ‬von Frey ᑼ∩ⷡ⹏ଔ⹜㛎ߦࠃࠅ㛽ォ⒖ㇱ૏ߩ−∩✭๺ലᨐ߇␜ߐࠇߚ‫ޕ‬⣲≌Ⴧᱺᛥ೙ല
ᨐߪ⷗ࠄࠇߥ߆ߞߚ߇‫⚦ࠎ߇੃ޔ‬⢩⒖ᬀᓟ߆ࠄ 227Th-EDTMP ࠍᛩਈߔࠆ߹ߢߩᦼ㑆ࠍ⠨ᘦߔࠆߎߣ
߇ᔅⷐߢ޽ࠆ‫ ߚ߹ޕ‬227Th-EDTMP ߦࠃࠆ㛽㜑Ქᕈߪ⷗ࠄࠇߥ߆ߞߚ‫ޕ‬ An alpha particle emitting radionuclide is promising for treatment of bone metastasis. Thorium-227 (t1/2 =18.72 d) is one of the promising Į-emitting nuclide due to the high LET and short path length of alphaparticles. In order to evaluate the efficacy of 227Th, we started the preclinical therapeutic study of bonemetastasis

using

a

bone

seeking

radiopharmaceutical,

227

Th-EDTMP.

Seven-week-old

femaleSprague-Dawley rats were inoculated syngeneic MRMT-1 mammary tumor cells into the left tibia. Three
weeks after cell inoculation, rats were injected 250 kBq/kg b.w. of 227Th-EDTMP intravenously.
227

Th-EDTMP injected rats showed bone pain palliation compared to control groups. On the other hand, there

were no therapeutic effects for inhibition of tumor proliferation. Toxic effect was also not shown.
1. ⎇ⓥ⋡⊛ ੃߇ࠎ‫ޔ‬೨┙⣼߇ࠎ‫ޔ‬⢖߇ࠎߩㅴⴕߦࠃࠅ⊒⃻ߔࠆォ⒖ᕈ㛽⣲≌ߪỗὓߥ−∩ࠍ߈ߚߒ‫ޔ‬ᴦ≮ㆊ⒟߿ᣣᏱ↢ᵴߦᣈ޿ߡ߽∩ߺߩࠦࡦ࠻ࡠ࡯࡞ߦ⧰ᘦߔࠆ∝଀߇ᄙ޿‫ߦߢ߹ࠇߎޕ‬ᄙߊߩᚻᴺ㧔㎾∩
೷≮ᴺ߿ᄖㇱ᡼኿✢≮ᴺ‫≮ࡦࡕ࡞ࡎޔ‬ᴺ߿ൻቇ≮ᴺ‫ޔ‬ᄖ⑼⊛ᚻⴚ≮ᴺߥߤ㧕߇ⴕࠊࠇߡ߈ߚ߇‫ߎޔ‬
ࠇࠄߩᣇᴺߩ᦭ലᕈߪዪㇱ⊛ᴦ≮ߢ޽ࠆ߆‫ోޔ‬りᕈߢ޽ߞߡ߽೽૞↪ߩᒝ޿߽ߩ‫ߚ߹ޔ‬−∩✭๺ߦ⇐߹ࠆᆑᕷ⊛≮ᴺߢ޽ࠆ‫ޕ‬ㄭᐕ‫ޔ‬89SrCl2 ߿ 153Sm-EDTMP ߩࠃ߁ߥ࡜ࠫࠝࠕࠗ࠰࠻࡯ࡊ㧔RI㧕ߩ ȕ✢ࠍ೑↪ߒߚ᡼኿ᕈක⮎ຠߪ−∩✭๺೷ߣߒߡ᰷☨ߢ↪޿ࠄࠇߡ޿ࠆ‫ߩࠄࠇߎޕ‬᡼኿ᕈක⮎ຠߪォ
⒖ߒߚ㛽ㇱ૏ߦ㑐ㅪߔࠆ−∩ࠍ๺ࠄߍߡ߈ߚ߇‫ޔ‬㛽ォ⒖⣲≌ߩᴦ≮ߦᔅⷐߥ㜞޿✢㊂ࠍ૶↪ߔࠆߎ− 31 −

JAEA-Review 2007-049

ߣߪ‫ޔ‬ȕ ✢ߩ㘧⒟߇㐳޿ߎߣߚ߼ߦ㛽㜑Ქᕈࠍ⺃⊒ߒਇน⢻ߢ޽ߞߚ‫ߦࠇߎޕ‬ኻߒߡ Į ✢ߪ⚵❱ਛߢ㜞޿ LET㧔⚂ 100 keV/µm㧕ߣ⍴޿㘧⒟( 50-100µm)ࠍ᦭ߔࠆߚ߼‫ޔ‬Į ✢᡼಴ᩭ⒳ߪォ⒖ᕈ㛽⣲≌ᴦ≮ߦᔕ↪ߢ߈ࠆน⢻ᕈࠍᜬߟ‫ޕ‬Į ✢ߩ㘧⒟߇⍴޿ߎߣߪ㛽㜑߳ߩⵍᦑ✢㊂ࠍᷫዋߐߖ‫ޔ‬㜞޿ LET ߦࠃࠅᒝജߥᲕ⚦⢩ലᨐࠍᜬߟ‫ߦࠄߐޕ‬⍴㘧⒟227

㧒㜞 LET ߣ޿߁‛ℂ⊛ᕈ⾰ߦട߃ߡ‫ޔ‬ታ㓙ߦ೑↪น⢻ߥ Į ✢᡼಴ᩭ⒳ߩ
ᄙߊߪუᄌ♽೉ߦዻߒ‫ޔ‬ᄙᲑ㓏უᄌߦࠃࠅⶄᢙߩ Į ✢‫ޔ‬ȕ ✢ࠍ᡼಴ߔࠆ

Th

18.72 d

Į
223

Ra

ᩭ⒳

11.435 dඨᷫᦼ‫ޕ‬⣲≌ㄭ૏ߦ߅޿ߡᄙᢙߩ Į ✢ࠍ᡼಴ߔ㧔࿑ 1 ਛߩ 227Th ߿ 223Ra ߥߤ㧕

᡼኿✢䈱
⒳㘃

Į
219

ࠆߎߣߪන৻ߩ Į ✢ࠍ᡼಴ߔࠆᩭ⒳ࠃࠅ߽✢㊂⊛ߦലᨐ⊛ߢ޽ࠆ‫ޕ‬Rn

3.96 sĮ ⎇ⓥઍ⴫⠪ߪࠕࠢ࠴࠾࠙ࡓ♽೉ਛߩ 227Th ߦ⌕⋡ߒ‫ޔ‬227Th ࠍㆬᛯ⊛ߦ215

㛽ߦ㓸Ⓧߐߖࠆ᡼኿ᕈක⮎ຠ㧦227Th-EDTMP ࠍวᚑߒ‫ࠬ࠙ࡑޔ‬૕ౝߢߩㄦㅦߥ㛽㓸Ⓧߣᆷᩭ⒳ߩ㜞޿㛽ౝ଻ᜬࠍ⷗಴ߒߚ‫ߚ߹ޕ‬ห᭽ߩ㛽㓸Ⓧᕈ
ࠍ␜ߔ 223RaCl2 ߣߩ✢㊂⹏ଔࠍⴕ޿‫ޔ‬227Th-EDTMP ߩඨᷫᦼߩ․ᕈߦࠃ

211

Po

Po

1.781 ms

Į
211

ȕ
211

ȕ

-

Bi

-

0.516 s0.28%

Į2.14 m
99.72%

PbĮ

36.1 m
207

ȕ

-

207

Pb

቟ቯ

Tl

4.77 mࠆఝ૏ᕈࠍ␜ߒߚ‫⎇ᧄޕ‬ⓥߢߪォ⒖ᕈ㛽⣲≌ࡕ࠺࡞࡜࠶࠻ࠍ૞ᚑߒ‫ޔ‬࿑ 1㧦ࠕࠢ࠴
ࠕࠢ࠴࠾࠙ࡓ
࠾࠙ࡓ♽೉ᩭ⒳♽೉ᩭ⒳227Th-EDTMP ࠍ↪޿ߚᴦ≮ࠍⴕ߁‫ޕ‬

2. ⎇ⓥౝኈ
2-1. 㛽ォ⒖ࡕ࠺࡞࡜࠶࠻ߩ૞ᚑ
Sprague-Dowley(SD)♽࡜࠶࠻ߩ੃≸⚦⢩ MRMT-1 ߪห♽࡜࠶࠻ߩ㛽㜑ౝߦ⒖ᬀߔࠆߣ㛽㜑ౝߢჇᱺߒᡆૃ⊛ߥ㛽ォ⒖ࠍᒻᚑߔࠆߎߣ߇ߢ߈ࠆ‫ᧄޕ‬ታ㛎ߢߪ MRMT-1 ࠍ SD ♽࡜࠶࠻Ꮐ⣊㛽ౝߦ
3x103 ୘⒖ᬀߒ㛽ォ⒖ࡕ࠺࡞ࠍ૞ᚑߒߚ‫ޕ‬⣲≌ߩჇᱺߦࠃࠆ㛽ォ⒖ߩᒻᚑߩ⏕⹺ߦߪ X ✢౮⌀෸߮ᩭකቇ⸻ᢿ↪᡼኿ᕈක⮎ຠ 99mTc-HMDP ࠍ↪޿ߚ㛽ࠪࡦ࠴ࠣ࡜ࡈࠖࠍ↪޿ߚ‫ޕ‬C 

2-2. 227Th-EDTMP ࠍ↪޿ߚォ⒖ᕈ㛽⣲≌ᴦ≮ߩᬌ⸽㛽ォ⒖ࡕ࠺࡞࡜࠶࠻ߩ૞ᚑࠍ⏕⹺ߒߚᓟ‫ޔ‬
250kBq/kg ૕㊀ߩ 227Th-EDTMP ࠍየ㕒⣂߆ࠄᛩਈߒߚ‫ޕ‬227

Th-EDTMP ߩᛩਈ೨߆ࠄᛩਈᓟ 3 ㅳ㑆߹ߢᓟ⚻ᤨ⊛ߦᴦ≮ലᨐߣᲥᕈࠍ⺞ߴߚ‫ޕ‬ᴦ≮ലᨐߩ⹏ଔ

ߦߪ⣲≌૕Ⓧ᷹ቯ‫ޔ‬von Frey ᑼ∩᷹ⷡቯࠍⴕߞߚ‫ޕ‬Ქᕈ⹏ଔߦߪ૕㊀᷹ቯ‫⃿ⴊޔ‬ᢙ⸘᷹ࠍⴕߞߚ‫ޕ‬.von Frey ᑼ∩ⷡ⹜㛎ߪ࡜࠶࠻ߩ⿷ⵣߦᯏ᪾ೝỗࠍട߃‫ޔ‬ᕆᕈ∩ࠍ⹏ଔߔࠆ⹜㛎ߢ޽ࠆ‫ޕ‬von Frey ࡈࠖ࡜ࡔࡦ࠻ࠍ࡜࠶࠻ߩ⿷ᐩߦု⋥ߦ޽ߡ‫ࠆߍ޽ࠍ⿷߇࠻࠶࡜ޔ‬ᯏ᪾ೝỗߩ㑣୯㧔࠾ࡘ࡯࠻ࡦߢ⴫⸥㧕ࠍ᷹ቯߒߚ‫⸃ޕ‬ᨆߢߪฝ⿷ᐩߣ㛽ォ⒖ߩ޽ࠆᏀ⿷ᐩߩᯏ᪾ೝỗߩ㑣୯ߩᏀฝᲧࠍ᳞߼ߚ‫ޔߚ߹ޕ‬㛽
ォ⒖ㇱ૏߳ߩ 227Th-EDTMP ߩ㓸Ⓧࠍ⏕⹺ߔࠆߚ߼ߦ 227Th ߅ࠃ߮ᆷᩭ⒳߇᡼಴ߔࠆ Ȗ ✢ࠍ Ȗ ࠞࡔ࡜ߢ᠟ᓇߒߚ‫ޕ‬

C 

4

D 

.

࿑ 2 㛽ォ⒖ࡕ࠺࡞࡜࠶࠻ߩ X ✢౮⌀ a)ో૕௝ b)ฝ⣊㛽 c)Ꮐ⣊㛽− 32 −E 

JAEA-Review 2007-049

3. ⎇ⓥ⚿ᨐ
3-1. 㛽ォ⒖ࡕ࠺࡞࡜࠶࠻ߩ૞ᚑ
X ✢౮⌀ߩ⚿ᨐ߆ࠄ‫⚦ࠎ߇੃ߦ࠻࠶࡜ޔ‬⢩ࠍ⒖ᬀᓟ 3 ㅳ㑆ߢᏀ⣊㛽⴫㕙਄ߦṁ㛽௝ࠍ⹺߼ߚ‫ࠄߐޕ‬
ߦ⒖ᬀᓟ 6 ㅳ㑆ߢߪ⣊㛽ߩṁ㛽߇ㅴߺ‫ߚ߹ޔ‬૕㊀ࠍᡰ߃ࠆߚ߼ߦ⣦㛽߇ᄌᒻߒߡ޿ࠆߩ߇⏕⹺ߐࠇߚ㧔࿑ 2㧕
‫⚦ࠎ߇੃ޕ‬⢩ࠍᏀ⣊㛽ߦ⒖ᬀߒߚ㓙‫ޔ‬ฝ⣊㛽ߦߪ PBS ࠍ 10µL ᛩਈߒߚ‫ޕ‬࿑ 2 ߦ߅޿ߡฝ
⣊㛽ߦᄌൻ߇⷗ࠄࠇߥ޿ߎߣ߆ࠄᏀ⣊㛽ߩ

99mTc-HMDPṁ㛽ߪ੃߇ࠎ⚦⢩ߣ㛽ߣߩ⋧੕૞↪ߩ⚿ᨐߣ⠨߃ࠄࠇࠆ‫ޕ‬࿑ 3 ਄ㇱߦ 99mTc-HMDP ߦࠃࠆ Ȗ ࠞࡔ࡜↹௝ࠍ␜ߔ‫ޕ‬99mTc-HMDP ߪ⥃ᐥߦᣈ޿ߡ㛽ォ⒖ߩ⸻ᢿߦ↪޿ࠄࠇࠆ᡼
኿ᕈක⮎ຠߢ޽ࠆ‫ޕ‬㛽ォ⒖ߢߪ㛽ォ⒖ㇱ૏ߩ㛽ઍ⻢߇ᵴ⊒ߦߥߞߡ߅ࠅ㛽ౝߢߩㅧ㛽߿ṁ㛽߇⋓ࠎߦⴕࠊࠇߡ޿ࠆ‫ߡߞ߇ߚߒޕ‬SD rat, female, 13-week-old
6 weeks after MRMT-1 injection
6 hrs after 99mTc-HMDP(37MBq) injection㛽ߦ㓸Ⓧߒ߿ߔ޿ 99mTc-HMDP ߪ㛽ઍ⻢✜

227Th-EDTMPߩᵴ⊒ߥォ⒖ㇱ૏ߩឬ↹ߦ↪޿ࠄࠇࠆ‫ޕ‬㛽
ォ⒖ࡕ࠺࡞࡜࠶࠻ߩォ⒖ㇱ૏ߦ99m

Tc-HMDP ߇㓸Ⓧߒߡ޿ࠆߩ߇⏕⹺ߢ߈ࠆ‫ ߡߞ߇ߚߒޕ‬X ✢᠟ᓇߦࠃࠆ㛽ォ⒖ߩᒻ
ᘒ⊛ߥ․ᓽ߅ࠃ߮ Ȗ ࠞࡔ࡜ࠍ↪޿ߚ
99m

Tc-HMDP ߩ㓸Ⓧߦࠃࠆᯏ⢻⊛․ᓽ߆ࠄ‫ޔ‬ߎߩࡕ࠺࡞߇㛽ォ⒖ࡕ࠺࡞ߣߒߡ᦭↪ߢ޽ࠆߎߣ߇␜ߐࠇߚ‫ޕ‬SD rat, female, 14-week-old
7 weeks after MRMT-1 injection
3 days after 227Th-EDTMP(1MBq) injection

࿑ 3 㛽ォ⒖ࡕ࠺࡞࡜࠶࠻ߩ Ȗ ࠞࡔ࡜↹௝

3-2. 227Th-EDTMP ࠍ↪޿ߚォ⒖ᕈ㛽⣲≌ᴦ≮ߩᬌ⸽
227

Th-EDTMP ߇⏕ታߦ㛽ォ⒖ㇱ૏ߦ㓸Ⓧߒߡ޿ࠆߎߣࠍ⏕⹺ߔࠆߚ߼ߦ 99mTc-HMDP ߢ੐೨ߦ㛽ォ⒖ㇱ૏ࠍ⏕⹺ߒߚࡕ࠺࡞࡜࠶࠻ߦ 1MBq ߩ 227Th-EDTMP ࠍᛩਈߒߡ Ȗ ࠞࡔ࡜ߢ᠟ᓇࠍⴕߞߚ‫ޕ‬227

Th-EDTMP ߩᛩਈߪ 99mTc-HMDP ࠍᛩਈߒߡ㧞ᣣᓟߦⴕߞߚߚ߼ 99mTc ߪචಽᷫ⴮ߒߡ޿ࠆ‫ޕ‬

227

Th ߪ Į უᄌߩᤨߦⶄᢙߩૐࠛࡀ࡞ࠡ࡯ߩ Ȗ ✢ࠍ᡼಴ߔࠆ‫ޕ‬
߹ߚ 227Th ߇უᄌߒߚᓟߩᆷᩭ⒳ߩ 223Ra

߿ߘߩᓟߩᆷᩭ⒳߽ૐࠛࡀ࡞ࠡ࡯Ȗ ✢ࠍ᡼಴ߔࠆ‫ޕ‬࿑ 3 ਅㇱߪ 227Th ߅ࠃ߮ᆷᩭ⒳ߦࠃࠆ Ȗ ࠞࡔ࡜↹௝ߢ޽ࠆ‫ޕ‬99mTc-HMDP ߣห᭽ߦ㛽ォ⒖ㇱ૏߳ߩ㓸Ⓧ߇⏕⹺ߐࠇߚ‫ޕ‬㧔࿑ 4㧕ߒ߆
ᴦ≮ታ㛎ߢߪήಣ⟎⟲ߦኻߒߡ 227Th-EDTMP ᛩਈ⟲ߩ−∩✭๺ലᨐ߇⏕⹺ߐࠇߚ‫ޕ‬ߒ⣲≌Ⴧᱺᛥ೙ലᨐߪᓧࠄࠇߥ߆ߞߚ‫ޕ‬Į ✢ߪ㘧⒟߇⍴޿ߚ߼㛽⴫㕙ߦ㓸Ⓧߒߚ 227Th ߿ߘߩᆷᩭ⒳߆ࠄ᡼಴ߐࠇࠆ Į ✢ߪ㛽๟ㄝߩ⣲≌ߦᾖ኿ߐࠇࠆ‫ߒ߆ߒޕ‬⣲≌߇ Į ✢ߩ㘧⒟ࠃࠅ߽ᄢ߈޿߽ߩߢ޽
ࠆ႐ว‫ޔ‬⣲≌ᷓㇱ߳ߩᾖ኿ߪߢ߈ߥ޿‫ᧄޕ‬ታ㛎ߢ↪޿ߚ㛽ォ⒖ࡕ࠺࡞ߪ੃߇ࠎ⚦⢩ࠍ⒖ᬀߒߡ߆ࠄ
3 ㅳ㑆ᓟߦ 227Th-EDTMP ࠍᛩਈߒߚ‫ޕ‬⒖ᬀᓟ 3 ㅳ㑆ߢߪᣢߦ⣲≌ߪ㛽ࠍṁ߆ߒߡ㛽ᄖ߳ᶐẢߒߡ޿ߚ‫ߡߞ߇ߚߒޕ‬㛽⴫㕙ߢߩ Į ✢ߩᾖ኿ߦࠃࠅ−∩✭๺ലᨐ߇ᓧࠄࠇߚ෻㕙‫ޔ‬⣲≌ߩᴦ≮ࠍⴕ߁ߎߣ
߇ߢ߈ߥ߆ߞߚߩߢߪߥ޿߆ߣ⠨߃ࠄࠇࠆ‫੹ޕ‬ᓟ‫⚦ࠎ߇੃ޔ‬⢩ࠍ⒖ᬀߒߡ߆ࠄ 227Th-EDTMP ࠍᛩਈߔࠆ߹ߢߩᦼ㑆ࠍᬌ⸛ߔࠆ੍ቯߢ޽ࠆ‫ޕ‬− 33 −

JAEA-Review 2007-049
㪊㪇

㪈㪉㪇㪇㪇
Control (n=6)

Control (n=6)
227Th-EDTMP injected (n=5)

㪉㪌

㪈㪇㪇㪇㪇

㪉㪇

㪏㪇㪇㪇

㪭㫆㫃㫌㫄㪼㩷㪲㫄㫄㪊 㪴㪩㪸㫋㫀㫆

227Th-EDTMP injected (n=5)

㪈㪌
㪈㪇
㪌

㪍㪇㪇㪇
㪋㪇㪇㪇
㪉㪇㪇㪇

㪇

㪇
㪇㪉㪈

㪉㪏
㪊㪌
㪎
㪈㪋
㪻㪸㫐
㪻㪸㫐㩷㪸㪽㫋㪼㫉㩷㫋㫌㫄㫆㫉㩷㫀㫅㫆㪺㫌㫃㪸㫋㫀㫆㫅

㪉㪈
㪇

㪋㪉
㪉㪈

㪉㪏
㪊㪌
㪎
㪈㪋
㪻㪸㫐
㪻㪸㫐㩷㪸㪽㫋㪼㫉㩷㫋㫌㫄㫆㫉㩷㫀㫅㫆㪺㫌㫃㪸㫋㫀㫆㫅

㪋㪉
㪉㪈

270

140

250

120

WBC [x10 uL]

230

Control (n=6)
227Th-EDTMP injected (n=5)

1002Weight [g]࿑ 4 −∩✭๺ലᨐߣ⣲≌૕Ⓧ

210
190
Control (n=6)

170

80
60
40
20

227Th-EDTMP injected (n=5)

150

0
21
0

28
7

35
14

42
21

0
21

28
7

35
14

42
21

day inoculation
day after tumor

1000

4

160
140
120
100
80
60
40
20
0

RBC [x10 uL]

4

Platelet [x10 uL]

day inoculation
day after tumor

Control (n=6)
227Th-EDTMP injected (n=5)

800
600
400
Control (n=6)

200

227Th-EDTMP injected (n=5)

0
21
0

28
7

35
14

42
21

day inoculation
day after tumor

21
0

28
35
7
14
day inoculation
day after tumor

4221

࿑ 5 227Th-EDTMP ᛩਈᓟߩ࡜࠶࠻ߩ૕㊀߅ࠃ߮ⴊ⃿ᢙߩ⚻ᤨ⊛ᄌൻᲥᕈࠍ⹏ଔߒߚ⚿ᨐࠍ࿑ 5 ߦ␜ߔ‫ޕ‬૕㊀ߩᄌൻߪ⷗ࠄࠇߥ߆ߞߚ‫ⴊޔ⃿ⴊ⊕ޔ⃿ⴊ⿒ޕ‬ዊ᧼౒ߦⴊ⃿ᢙߪᷫዋߒߚ‫ޕ‬㛽ォ⒖ࡕ࠺࡞࡜࠶࠻ߩ⣲≌૕Ⓧ߇ᄢ߈ߊߥࠆߚ߼‫ޔ‬⒖ᬀᓟ 6 ㅳએ㒠ߢߩታ㛎ߪ
୶ℂ⊛ⷰὐ߆ࠄⴕ߁ߎߣߪߢ߈ߥ޿‫⃿ⴊߒ߆ߒޕ‬ᢙ߇ᷫዋߒߚ੹࿁ߩ⚿ᨐߪᚒ‫߇ޘ‬ᱜᏱ࡜࠶࠻ߦኻ
ߒߡⴕߞߚᲥᕈ⹜㛎ߩ⚿ᨐࠍ෻ᤋߒߡ߅ࠅ‫⃿ⴊޔ‬ᢙᷫዋߪ੹ᓟჇടߦᄌൻߔࠆߎߣ߇੍ᗐߐࠇࠆ‫ޕ‬
4. ߹ߣ߼
ᧄ⹜㛎⎇ⓥߢߪ 227Th-EDTMP ߦࠃࠆォ⒖ᕈ㛽⣲≌ߦኻߔࠆ−∩✭๺ലᨐ߇␜ߐࠇߚ߇⣲≌Ⴧᱺᛥ೙ലᨐߪ⷗ࠄࠇߥ߆ߞߚ‫ ߪࠇߎޕ‬Į ✢ߩ㘧⒟ࠃࠅ߽ᄢ߈޿૕Ⓧߩ⣲≌ߦኻߒߡലᨐࠍ಴ߖߥ߆ߞ

− 34 −

JAEA-Review 2007-049

ߚߣ⠨߃ࠄࠇ‫੹ޔ‬ᓟ‫ޔ‬㛽ౝߢ⣲≌Ⴧᱺ߇޽ࠆ⒟ᐲࠊ߆ࠆᣧᦼߦᴦ≮ࠍ㐿ᆎߔࠆߎߣߦࠃࠅ‫ޔ‬Į ✢ߩᜬߟ᛫⣲≌ലᨐࠍ␜ߖࠆߩߢߪߥ޿߆ߣ⠨߃ߡ޿ࠆ‫⹏ߩߺ∩ޔߚ߹ޕ‬ଔߢߪ von Frey ᑼ∩ⷡ⹜㛎ࠍⴕߞߚ߇‫ޔ‬ታ㛎⠪ߩਥⷰ߇ታ㛎⚿ᨐߦ෻ᤋߒߡ޿ࠆน⢻ᕈ߇޽ࠆߚ߼ࠃࠅߎߩᣇᴺߦ⠌ᾫߔࠆߥ޿
ߒߪᯏ᪾ࠍ↪޿ߚቴⷰ⊛⹏ଔࠍዉ౉ߔࠆߎߣࠍᬌ⸛ߒߡ޿ࠆ‫ޕ‬ታ㛎ᣇᴺߩᡷ⦟߅ࠃ߮‫ޔ‬એਅߩ⺖㗴ࠍᬌ⸛ߔࠆߎߣߦࠃࠅߦ੹ᓟࠃࠅ᣿⏕ߦ Į ✢ߦࠃࠆᴦ≮ലᨐࠍ⹏ଔߢ߈ࠆߣ⠨߃ࠆ‫ޕ‬1.

㛽⣲≌ᒻᚑᤨᦼߣ 227Th-EDTMP ᛩਈᤨᦼߩᦨㆡൻߩᬌ⸛

2.

227

3.

227

4.

࡜࠶࠻૕ౝߢߩⵍ߫ߊ✢㊂ߩ⸘▚ߣࡅ࠻߳ߩㆡᔕ⹏ଔ

Th-EDTMP ߣ 223RaCl2 ߣߩᴦ≮ലᨐߩᲧセᬌ⸛
Th-EDTMP ߣࡆࠬࡈࠜࠬࡈࠜࡀ࡯࠻⵾೷ߣߩᴦ≮ലᨐߩᲧセᬌ⸛

5. ෳ⠨ᢥ₂
ާ1ިLewington V. J., “Bone-seeking radionuclides for therapy,” J. Nucl. Med. 2005:46 Suppl.1:38S-47S.
ާ2ިMedhurst S. J., Walker K., Bowes M., Kidd B. L. , Glatt M, Muller M., Hattenberger M., Vaxelaire J.,
O'Reilly T., Wotherspoon G., Winter J., Green J., Urban L. “A rat model of bone cancer pain,” Pain
2002: 96, 129-40.
ާ3ި Mulford D. A., Scheinberg D. A., Jurcic J. G., “The promise of targeted a-particle therapy,” J. Nucl.
Med. 2005:46 Suppl.1:199S-204S.
ާ4ިMundy G. R. “Metastasis to bone:causes, consequences and therapeutic opportunities,” Nat. Rev.
Cancer.2002: 2, 584-593.
ާ5ިOgawa K., Mukai T., Asano D., Kawashima H., Kinuya S., Shiba K., Hashimoto K., Mori H., Saji H.
“Therapeutic effects of a 186Re-complex-conjugated bisphosphonate for the palliation of metastaticbone pain in an animal model,” J. Nucl. Med.2007: 48, 122-7.
ާ 6 ި Washiyama K., Amano R., Sasaki J., Kinuya S., Tonami N., Shiokawa S., Mitsugashira T.,“227Th-EDTMP: a potential therapeutic agent for bone metastasis,” Nucl. Med. Biol.2004: 31, 901-8.

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JAEA-Review 2007-049

㧣㧚᡼኿✢⠴ᕈേ‛㨯ࠢࡑࡓࠪߦ߅ߌࠆ DNA ៊்ߩୃᓳᯏ᭴ߩ⸃᣿
Study on the Repair Mechanism of Ionizing Radiation-Induced DNA Damage
in TardigradesၳᎹᄢ᮸Daiki Horikawaർᶏ㆏ᄢቇᄢቇ㒮࿾⃿ⅣႺ⑼ቇ⎇ⓥ⑼Graduate School of Environmental Earth Science, Hokkaido University᭎ⷐ ࠢࡑࡓࠪߪ‫ޔ‬᡼኿✢ߦኻߒߡᒝ޿⠴ᕈࠍᜬߟ੐߇⍮ࠄࠇߡ޿ࠆ‫ߩࠪࡓࡑࠢޔߒ߆ߒޕ‬᡼኿✢⠴ᕈࠍᡰ߃ࠆࡔࠞ࠾࠭ࡓߪోߊߩᧂ⍮ߢ޽ࠆ‫⎇ᧄޕ‬ⓥߢߪ‫✢ࡑࡦࠟޔ‬ᾖ኿ߦࠃࠅ‫ ߩࠪࡓࡑࠢޔ‬DNA ߩ
ੑ㊀㎮ಾᢿߩୃᓳ߇ⴕࠊࠇߡ޿ࠆ߆ࠍᬌ⸽ߔࠆߚ߼‫ޔߕ߹ޔ‬ੑ㊀㎮ಾᢿ߇⿠߈ࠆ߆ࠍ‫ࠕ࠻࠶ࡔࠦޔ‬࠶࠮ࠗᴺࠍ↪޿ߡ⺞ᩏߒߚ‫⚿ߩࠗ࠮࠶ࠕ࠻࠶ࡔࠦޕ‬ᨐ‫ ߪߢࠪࡓࡑࠢޔ‬DNA ߦᒝߊ⚿วߔࠆ࠲ࡦࡄ
ࠢ⾰߇ሽ࿷ߒ‫߇ࠇߎޔ‬᡼኿✢⺃ዉᕈߩ DNA ಾᢿࠍ⿠߈ߦߊߊߒߡ޿ࠆน⢻ᕈ߇␜ໂߐࠇߚ‫ࠄߐޕ‬ߦ‫ߩࠪࡓࡑࠢޔ‬ਛߢ߽․ߦ㜞޿᡼኿✢⠴ᕈࠍ᦭ߔࠆ⿥᡼኿✢⠴ᕈ♽⛔ࠍ૞ᚑߔࠆߚ߼‫ޔ‬4He ࠗࠝࡦࠍᾖ኿ᓟߦሶቊ߇↢ߓࠆ߆ࠍᬌ⸽ߒߚ‫⚿ߩߘޕ‬ᨐ‫ޔ‬5000 Gy ߩ 4He ࠗࠝࡦࠍᾖ኿ߐࠇߚ୘૕߆ࠄሶ
ቊࠍᓧࠆ੐߇ߢ߈ߚ‫ޕ‬ Tardigrades are known as radiation tolerant animals. However, mechanisms by which they can resist
radiation are still unknown. In the present study, I tried to detect radiation-induced DNA double strand breaks
in tardigrades using comet assay. The results from comet assay revealed that there are proteins that strongly
bind DNA in tardigrades, implying that such proteins prevent DNA from shattering by ionizing radiation. I
also tested whether tardigrades produce their offspring after irradiation of 4He ions in order to gain
super-radiation tolerant strain among tardigrades. As results, viable progeny was produced from thetardigrades irradiated with even 5000 Gy of 4He ions.
1. ⎇ⓥ⋡⊛✭ᱠേ‛࡮ࠢࡑࡓࠪ㘃ߪ‫ޔߣࠆࠇߐᦑߦ῎ੇޔ‬૕ౝ߆ࠄ᳓ಽߩ߶ߣࠎߤࠍᄬ޿‫ޔ‬“anhydrobiosis”(cryptobiosis)ߣࠃ߫ࠇࠆ⁁ᘒߦ⒖ⴕߔࠆ‫ޕ‬anhydrobiosis ⁁ᘒߩࠢࡑࡓࠪߦౣ߮᳓ࠍਈ
߃ࠆߣ‫ޔ‬ๆ᳓ߒ‫ޔ‬రߩᵴേ⁁ᘒߦᚯࠆ‫ޕ‬anhydrobiosis ⁁ᘒߩࠢࡑࡓࠪ㘃ߪ‫ޔ‬+151˚C ߩ㜞᷷‫ޔ‬-273˚Cߩૐ᷷‫ޔ‬6000 ᳇࿶‫᦭ޔ‬ᯏṁᇦߥߤ‫ޔ‬᭽‫ߥޘ‬ᭂ㒢ⅣႺߦኻߔࠆ⠴ᕈࠍ␜ߔߎߣ߇⍮ࠄࠇߡ޿ࠆާ1ި‫ޕ‬ࠢࡑࡓࠪߦ߅ߌࠆߎߩࠃ߁ߥⅣႺ⠴ᕈ⢻ജߦߟ޿ߡߪ‫ޔ‬100 ᐕએ਄߽೨߆ࠄ⍮ࠄࠇߡ޿ߚ߇‫ߩߎޔ‬↢‛ߩⅣႺ⠴ᕈߦ㑐ߔࠆᯏ᭴ߦߟ޿ߡߪోߊߩᧂ⍮ߩ߹߹ߢ޽ߞߚ‫ޕ‬ࠢࡑࡓࠪߪ߹ߚ‫ޔ‬᡼኿✢ߦኻߒߡ߽ᒝ޿ᛶ᛫ᕈࠍᜬߟ੐߇⍮ࠄࠇߡ޿ࠆ‫ߩߎޕ‬႐ว‫ޔߪࠪࡓࡑࠢޔ‬anhydrobiosis ⁁ᘒߩߺߢߥߊ‫ޔ‬ㅢᏱߩᵴേ⁁ᘒߦ߅޿ߡ߽‫ ߘࠃ߅ޔ‬5000 Gy ߩ X ✢‫ޔ‬4400 - 5000 Gyߩࠟࡦࡑ✢‫ ߡߒߘޔ‬5200 – 6200 Gy ߩ He ࠗࠝࡦߩᾖ኿ߦ⠴߃ࠆ੐߇ߢ߈ࠆ ާ2, 3ި‫ޕ‬ ߎߩࠃ߁ߦ‫ߡ߼ࠊ߈߇ࠪࡓࡑࠢޔ‬㜞޿᡼኿✢ᾖ኿⠴ᕈࠍᜬߟℂ↱ߣߒߡ‫ޔ‬㜞✢㊂ߩ᡼኿✢ߦࠃࠆ
DNA ߩੑ㊀㎮ಾᢿߥߤߩ៊்ࠍ‫ޔ‬ലᨐ⊛ߦୃᓳߔࠆᯏ᭴߇ሽ࿷ߔࠆߎߣ߇ᒝߊ␜ໂߐࠇࠆ‫߹ࠇߎޕ‬− 37 −

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ߢߦ‫ޔ‬᡼኿✢ߦࠃࠆ DNA ៊்ߩୃᓳᯏ᭴ߪ‫ޔ‬ਥߦ⚦⩶ߩ৻⒳ Deinococcus radiodurans ࠍࡕ࠺࡞↢‛ߣߒߡ⎇ⓥߐࠇߡ߈ߚާ4ި‫ࠪࡓࡑࠢޔߒ߆ߒޕ‬㘃ߩࠃ߁ߥᄙ⚦⢩↢‛ߦ߅ߌࠆ DNA ୃᓳᯏ᭴ߪ‫ޔ‬D. radiodurans ߢߩୃᓳᯏ᭴ߣߪ‫੍߇ߣߎࠆ޽ߢࡓ࠭࠾ࠞࡔࠆߥ⇣ߊోޔ‬ᗐߐࠇࠆ‫ࡑࠢޔߜࠊߥߔޕ‬ࡓࠪ㘃ߦ߅ߌࠆ DNA ୃᓳᯏ᭴ࠍតࠆߎߣߪ‫ޔ‬㜞╬↢‛ߦ߅ߌࠆ᡼኿✢⠴ᕈ₪ᓧߩน⢻ᕈߦߟߥ߇
ࠆ߽ߩߣᕁࠊࠇࠆ‫⎇ᧄޔ߃߹〯ࠍߣߎߩߎޕ‬ⓥߢߪ‫৻ߩࠪࡓࡑࠢޔ‬⒳ߢ޽ࠆ࠷ࡔࡏ࠰ࡗࡑࠢࡑࡓࠪ
Ramazzottius varieornatus ࠍ᡼኿✢⠴ᕈ㜞╬↢‛ߩࡕ࠺࡞ߣߒߡᵴ↪ߒ‫ ߩߘޔ‬DNA ៊்ߩୃᓳᯏ᭴ࠍ⸃
᣿ߔࠆߎߣࠍ⋡⊛ߣߔࠆ‫ޔࠍࠪࡓࡑࠢࡑࡗ࠰ࡏࡔ࠷ޔߚ߹ޕ‬㜞╬↢‛ߦ߅ߌࠆ᡼኿✢⠴ᕈᯏ᭴ࠍ⎇ⓥߔࠆߚ߼ߩ᦭↪ߥࡕ࠺࡞ߣߒߡ‫ޔ‬዁᧪⊛ߦߐࠄߦ⊒ዷߐߖࠆߚ߼‫ޔ‬ห⒳ߦ߅޿ߡ‫ߦ․ޔ‬㜞޿᡼኿✢⠴ᕈࠍ᦭ߔࠆ⿥᡼኿✢⠴ᕈ♽⛔ࠍ૞ᚑߔࠆ‫ޕ‬
2. ⎇ⓥౝኈ
2-1. R. varieornatus ߦ߅ߌࠆ DNA ੑ㊀㎮ಾᢿߩᬌ಴
ᧄታ㛎ߢߪ‫ⵍޔ‬ᾖ኿୘૕ߦ߅ߌࠆ DNA ੑ㊀㎮ಾᢿߦࠃࠆ DNA ߩᢿ ൻࠍᬌ಴ߔࠆߚ߼‫࠶ࡔࠦޔ‬࠻ࠕ࠶࠮ࠗᴺࠍⴕߞߚ‫ޔߕ߹ޕ‬ᵴേ⁁ᘒߩ R. varieornatus (n = 5 - 8)ߦ‫ޔ‬0, 500, 1000, 2000, 4000 Gy
ߩ 60Co ࠟࡦࡑ✢(0.2 KeV/µm)ࠍᾖ኿ߒߚ‫ޕ‬ᾖ኿⋥ᓟߩ୘૕ࠍ phosphate buffered saline(PBS, pH 7.4)ਛ
ߦߡࠞ࠶࠲࡯ߢಾ㐿ߒ‫ޔ‬න⚦⢩ࠍಽ㔌ߒߚ‫⚦ޕ‬⢩ Ộ PBS 50 µl ߣ 2% afarose-LGT GP-42 (Nacalai
Tesque)50 µl ࠍᷙวߒ‫ߩߎޔ‬ᷙวᶧ 80 µl ࠍ‫ ߼ߓ߆ࠄ޽ޔ‬1% agarose GP-42 (Nacalai Tesque)ߢࠦ࡯࠹
ࠖࡦࠣߒߚࠬ࡜ࠗ࠼ࠟ࡜ࠬߦṢਅߒ‫ߡߒߦ⁁࠴࠶ࠗ࠼ࡦࠨߢࠬ࡜ࠟ࠼ࠗ࡜ࠬߩઁޔ‬᳖᷷ߢ࿕߼ߚ‫ޕ‬ߎߩࠥ࡞ߩ਄ߦ‫ ߦࠄߐޔ‬1% afarose-LGT GP-42 80 µl ࠍṢਅߒ‫ޔ‬਄ㅀߩࠃ߁ߦࠨࡦ࠼ߒߡ᳖᷷ߢ࿕߼
ߚ‫ޕ‬ᰴߦ‫ࠍࠬ࡜ࠟ࠼ࠗ࡜ࠬޔ‬ᥧᚲ‫ޔ‬4ºC ߦߡ⚦⢩ṁ⸃ᶧߦ 60 ಽ㑆ᶐߒߚ‫⚦ޔ߅ߥޕ‬⢩ṁ⸃ᶧߣߒߡ
ߪ‫ߩ⾰ࠢࡄࡦ࠲ޔ‬ṁ⸃ജߩᒙ޿ṁ⸃ᶧ A(2.5 M NaCl, 10 mM Tris, 100 mM ethylenediamine tetraacetic
acid disodium salt, 1% sarcosinate, 0.01% Triton X-100; pH 8.3)޽ࠆ޿ߪ‫ޔ‬ṁ⸃ജߩᒝ޿ṁ⸃ᶧ B (1%sodium dodecyl sulfate (SDS))ߩ 2 ⒳㘃ߩṁᶧߩߤߜࠄ߆ࠍ↪޿ߚ‫ߩߘޕ‬ᓟ‫ ࠍࠬ࡜ࠟ࠼ࠗ࡜ࠬޔ‬TBE(90mM Tris, 2 mM ethylenediamine tetraacetic acid disodium salt, 90 mM boric acid; pH 8.0)ߢḩߚߒߚ㔚᳇ᵒേᮏߦ⒖ߒ‫ޔ‬ᥧᚲ‫ޔ‬4ºC ߦߡ‫ޔ‬50 V ߢ 10 ಽ㑆ᵒേߒߚ‫ޕ‬ᵒേᓟ‫ ࠍࠬ࡜ࠟ࠼ࠗ࡜ࠬޔ‬70% ethanolߦ 10 ಽ㑆ᶐߒߡ࿕ቯߒ‫ޔ‬㘑ੇߒߚ‫ޕ‬㘑ੇߒߚࠥ࡞ߦ SYBR Green I (Cambrex)20 µl ࠍṢਅߒߡ DNA
ࠍᨴ⦡ߒ‫Ⱟޔ‬శ㗼ᓸ㏜(Axio Imager Z1, Carl Zeiss)ਅߢኻ‛࡟ࡦ࠭୚₸ x20 ߦߡⷰኤߒ‫ޔ‬౮⌀᠟ᓇࠍⴕߞߚ‫ޕ‬ᓧࠄࠇߚ↹௝ߪ‫(ࠕࠚ࠙࠻ࡈ࠰ޔ‬Comet Analyzer 1.5, You Works)ߦߡ⸃ᨆߒߚ‫ޕ‬2-2. R. varieornatus ߦ߅ߌࠆ⿥᡼኿✢⠴ᕈ♽⛔ߩㆬᛮ ࠢࡑࡓࠪߩਛߢ߽ࠃࠅᒝ޿᡼኿✢⠴ᕈࠍᜬߟ♽⛔ࠍ૞⵾ߔࠆߚ߼‫ޔ‬᡼኿✢ࠍᾖ኿ߒߚ R.
varieornatus ߆ࠄሶቊ߇↢ߓࠆ߆ࠍᬌ⸛ߒߚ‫ᧄޕ‬ታ㛎ߢߪ‫ޔ‬X ✢߿ࠟࡦࡑ✢ߦᲧߴߡ↢‛ലᨐߩ㜞
޿ 4He ࠗࠝࡦ✢ࠍ↪޿ߚ‫ޕ‬ᵴേ⁁ᘒ߅ࠃ߮ anhydrobiosis ⁁ᘒߩ R. varieornatus (n = 57 - 78)ߦ 0, 500,
߅ࠃ߮ 5000 Gy ߩ 4He ࠗࠝࡦ(50 MeV, 16.3 KeV/µm)ࠍᾖ኿ߒߚ‫ᧄޔ߅ߥޕ‬ታ㛎ߩ᧚ᢱߦߪቐൻᓟ 7ᣣ⋡ߩ୘૕ࠍ↪޿ߚ‫ޕ‬ᾖ኿ᓟߔߋߦ‫ޔ‬୘૕ߦ⫳⇐᳓ࠍਈ߃‫࡜࡟ࡠࠢޔ‬ṁᶧߩ౉ߞߚ agar ၭ࿾ߦ⒖ߒߚ‫ޕ‬ၭ࿾ࠍᲤᣣⷰኤߒ‫ߚࠇߐߣ⪭ߺ↥ޔ‬ෆߪ࿁෼ߒ‫⇐⫳ޔ‬᳓ߣߣ߽ߦ agar ၭ࿾ߦ⒖ߒߚ‫ࠇߘޕ‬ߙࠇߩ✢㊂඙ߦ߅ߌࠆ↥ෆᢙߣቐൻ୘૕ᢙࠍ⸥㍳ߒߚ‫ޕ‬
3. ⎇ⓥ⚿ᨐ࡮⠨ኤ
3-1. R. varieornatus ߦ߅ߌࠆ DNA ੑ㊀㎮ಾᢿߩᬌ಴ ᧄ⎇ⓥߦࠃߞߡ‫ࠗ࠮࠶ࠕ࠻࠶ࡔࠦߦࠪࡓࡑࠢޔ‬ᴺߩㆡ↪߇‫ޔ‬ೋ߼ߡ⹜ߺࠄࠇߚ‫✢ࡑࡦࠟޕ‬ᾖ኿ᓟ− 38 −

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ߩ R. varieornatus ߦ߅ߌࠆੑ㊀㎮ಾᢿߦࠃࠆ DNA ᢿ ൻߩนⷞൻߪ‫⚦ޔ‬⢩ṁ⸃ᶧߩṁ⸃ജߩ㆑޿ߦ
ࠃߞߡ‫ޔ‬㗼⪺ߥᏅ߇⷗ࠄࠇߚ‫⚦ޕ‬⢩ṁ⸃ᶧ A ࠍ↪޿ߚ႐ว‫ޔ‬0 - 4000 Gy ߩߔߴߡߩ✢㊂඙ߦ߅޿ߡ‫ޔ‬
tail ߇ⷰኤߐࠇߥ߆ߞߚ(࿑ 1A)‫৻ޕ‬ᣇ‫⚦ޔ‬⢩ṁ⸃ᶧ B ࠍ↪޿ߚ႐ว‫ޔ‬4000 Gy ߩᾖ኿ᓟߦߪߞ߈ࠅ
ߣߒߚᒻ⁁ߩ tail ߇ⷰኤߐࠇߚ(࿑ 1B)‫ߩߎޔࠄ߇ߥߒ߆ߒޕ‬႐วߦ߅޿ߡ߽‫ޔ‬2000 Gy ߹ߢߩᾖ኿
ߦ߅޿ߡߪ‫ߩߣ࡞࡯ࡠ࠻ࡦࠦޔ‬㑆ߦ‫ޔ‬DNA ߩ௝ߦᄢ߈ߥ㆑޿ߪ⷗ࠄࠇߥ߆ߞߚ‫ޕ‬ ⚦⢩ṁ⸃ᶧ B (1% SDS)ࠍ↪޿ߚࠦࡔ࠶࠻ࠕ࠶࠮ࠗᴺࠍⴕߞߚ႐วߩߺߦ‫ޔ‬4000 Gy ߩᾖ኿ᓟߦ tail߇ⷰኤߐࠇߚේ࿃ߣߒߡ‫ޔ‬R. varieornatus ߦߪ‫ޔ‬DNA ߦ߈ࠊ߼ߡᒝߊ⚿วߔࠆ࠲ࡦࡄࠢ⾰߇ሽ࿷ߔࠆน⢻ᕈ߇␜ໂߐࠇࠆ‫⚦ޔߪ⾰ࠢࡄࡦ࠲ߥ߁ࠃߩߎޕ‬⢩ṁ⸃ᶧ A ߢߪ߶ߣࠎߤนṁൻߐࠇߥ߆ߞߚ
ߚ߼‫ޔ‬㔚᳇ᵒേߒߡ߽ᢿ ൻߒߚ DNA ߇ᵹࠇߕ‫ޔ‬tail ߩᒻߦߥࠄߥ߆ߞߚߩߛࠈ߁‫ޕ‬ ߹ߚ‫⚦ޔ‬⢩ṁ⸃ᶧ B ߢಣℂߒߚ႐วߢ߽‫ޔ‬2000 Gy ߹ߢߩᾖ኿ᓟߦߪߞ߈ࠅߣߒߚ tail ߇⷗ࠄࠇߥ߆ߞߚ੐߆ࠄ‫ޔ‬R. varieornatus ߪ‫ߦ‛↢ߩઁޔ‬Ყߴ‫ޔ‬᡼኿✢ߦࠃࠆ DNA ੑ㊀㎮ಾᢿ߇߶ߣࠎߤ⿠
ߎࠄߥ޿น⢻ᕈ߇⠨߃ࠄࠇࠆ‫ޔߣࠆߔ߆ߒ߽ޕ‬R. varieornatus ߩ᡼኿✢⠴ᕈߪ‫ޔ‬DNA ⚿วᕈߩ࠲ࡦ
ࡄࠢ⾰߇૗ࠄ߆ߩᒻߢ DNA ࠍ㒐⼔ߒ‫ޔ‬ੑ㊀㎮ಾᢿࠍ⿠߈ߦߊߊߒߡ޿ࠆߎߣߦࠃߞߡᚑ┙ߒߡ޿ࠆߩ߆߽ߒࠇߥ޿‫ޕ‬

࿑ 1 0 ߹ߚߪ 4000Gy ߩࠟࡦࡑ✢ᾖ኿ᓟߩࠢࡑࡓࠪ Ramazzottius varieornatus ߦ߅ߌࠆ DNA ࠦࡔ࠶࠻௝‫ޔߡ޿߅ߦࠗ࠮࠶ࠕᧄޕ‬2 ⒳㘃ߩ⚦⢩ṁ⸃ᶧ A㧔࿑਄㧕ߣ B㧔࿑ਅ㧕ࠍ↪޿ߡಣℂߒߚ(⚦⢩ṁ⸃ᶧ A: 2.5 M NaCl, 10 mM Tris, 100 mM ethylenediamine tetraacetic acid disodium salt, 1%
sarcosinate, 0.01% Triton X-100; pH 8.3; ⚦⢩ṁ⸃ᶧ B: 1% sodium dodecyl sulfate (SDS))‫ޕ‬

3-2. R. varieornatus ߦ߅ߌࠆ⿥᡼኿✢⠴ᕈ♽⛔ߩㆬᛮanhydrobiosis ⁁ᘒ߅ࠃ߮ᵴേ⁁ᘒ⁁ᘒߩ R. varieornatus ߦ 4He ࠗࠝࡦࠍᾖ኿ᓟߦ‫ⵍޔ‬ᾖ኿୘૕ࠍ
ⷰኤߒߚߣߎࠈ‫ޔ‬ਔ⁁ᘒߣ߽‫✢ޔ‬㊂ଐሽ⊛ߦ↥ෆᢙ߇ᷫዋߔࠆ௑ะ߇⷗ࠄࠇߚ߽ߩߩ(࿑ 2A)‫ޔ‬ᵴേ⁁ᘒߩ႐วߪ 500 Gy ߦ߅޿ߡ‫ޔ‬anhydrobiosis ⁁ᘒߩ႐วߪ 500, 5000 Gy ߩ޿ߕࠇߩ✢㊂඙ߦ߅޿ߡ߽↥ෆߣቐൻ߇ⷰኤߐࠇߚ(࿑ 2A, B)‫ޔߦ․ޕ‬5000 Gy ߽ߩ✢㊂ߩࠗࠝࡦ✢ࠍᾖ኿ߐࠇߚᄙ⚦⢩↢‛߇ᰴ਎ઍߦሶቊࠍᱷߒߚߎߣ߇⏕⹺ߐࠇߚߩߪ‫ߦߢ߹ࠇߎޔ‬ႎ๔߇ߥߊ‫⎇ᧄޔ‬ⓥ߇ೋ߼ߡߢ޽ࠆ‫ޕ‬5000 Gy ߩ 4He ࠗࠝࡦࠍᾖ኿ߐࠇߚ୘૕߆ࠄ↢ߓߚሶቊߪ‫ޔ‬ㆮવ⊛ߦᒝ޿᡼኿✢⠴ᕈࠍᜬߟ੐߇੍
ᗐߐࠇࠆߚ߼‫⃻ޔ‬࿷‫ߩߎޔ‬ሶቊࠍჇᱺߐߖ‫⛔♽ޔ‬ൻࠍⴕߞߡ޿ࠆ‫ޕ‬− 39 −

JAEA-Review 2007-049

࿑ 2 Anhydrobiosis ⁁ᘒ (Anh) ߅ࠃ߮ᵴേ⁁ᘒ (wet) ߩࠢࡑࡓࠪ Ramazzottius varieornatus ߳ߩ
He ࠗࠝࡦᾖ኿߇‫ޔ‬૕ߩ↥ෆᢙ (A) ߣ↥੿ᢙ (B) ߦਈ߃ࠆᓇ㗀‫ޔߪࠢࠬ࡝࠹ࠬࠕޕ‬anhydrobiosis⁁ᘒߣᵴേ⁁ᘒߩࠣ࡞࡯ࡊ㑆ߦ߅ߌࠆ⛔⸘⊛᦭ᗧᏅࠍ␜ߔ (chi-square test with Yeats correction;*p < 0.05)‫ޕ‬

4. ߹ߣ߼
ᧄ⎇ⓥߦ߅޿ߡ‫ޔ‬᡼኿✢ᾖ኿ᓟߩࠢࡑࡓࠪߩ DNA ៊்ᬌ಴ࠍೋ߼ߡ⹜ߺߚ‫ࠗ࠮࠶ࠕ࠻࠶ࡔࠦޕ‬ߩ⚿ᨐ߆ࠄ‫ޔߪߢࠪࡓࡑࠢޔ‬᡼኿✢ߦࠃࠆ DNA ߩಾᢿ߇⿠߈ߦߊ޿੐߇ુ߃ߚ‫੹ޕ‬ᓟ‫ߩߎޔ‬㒐⼔⢻ജ߇૗ߦ⿠࿃ߔࠆ߆ࠍ⺞ᩏߔࠆߣߣ߽ߦ‫ޔ‬DNA ୃᓳ⢻ജߦߟ޿ߡ߽ᬌ⸽ߒߡⴕߊ੍ቯߢ޽ࠆ‫߹ޕ‬ߚ‫⎇ᧄޔ‬ⓥ߆ࠄ‫ޔ‬5000 Gy ߩ 4He ࠗࠝࡦࠍᾖ኿ߐࠇߚ୘૕߆ࠄሶቊࠍᓧࠆ੐ߦᚑഞߒߚ‫੹ޕ‬ᓟ‫ߎޔ‬ߩ♽⛔߇‫ߌࠊࠅߣޔ‬ᒝ޿᡼኿✢⠴ᕈࠍᜬߟ߆ࠍᬌ⸽ߔࠆߚ߼‫ߦࠄߐޔ‬᡼኿✢ᾖ኿ࠍⴕ޿‫ޔ‬⠴ᕈ⹏ଔࠍⴕ޿ߚ޿‫ޕ‬5. ⻢ㄉ ᧄ⎇ⓥࠍㆀⴕߔࠆߦ޽ߚࠅ‫ޔ‬ᣣᧄේሶജ⎇ⓥ㐿⊒ᯏ᭴ࡑࠗࠢࡠࡆ࡯ࡓ⚦⢩ᾖ኿⎇ⓥࠣ࡞࡯ࡊߩဈ
ਅື຦᳁‫ޔ‬๺↰ᚑ৻᳁‫ޔ‬ᵿ↰ାⴕ᳁‫ޔ‬ዊᨋᵏᒾ᳁‫᧲ޔ‬੩ᄢቇℂቇ⎇ⓥ⑼ߩ࿡ᨑᱞ๺᳁‫ޔ‬ਭ଻ஜ㓶᳁ߦߪ⚳ᆎᚻෘ޿ߏᜰዉࠍ޿ߚߛ޿ߚ‫ߩߎޕ‬႐ࠍ୫ࠅߡోߡߩᣇߦ⻢ᗧࠍ⴫ߔࠆ‫ޕ‬
6. ᒁ↪ᢥ₂
ާ1ިD.R. Nelson. Integ.Comp.Biol. 42: pp.652-659 (2002).
ާ2ިR.M. May et al. Bull. Biol. Fran. Belgiq. 98: pp.349-367 (1964).
ާ3ިD.D. Horikawa et al. Int. J. Radiat. Biol. 82: pp. 843-848 (2006).
ާ4ިV. Mattimore et al. J. Bacteriol. 178: 633-637 (1996).

− 40 −

JAEA-Review 2007-049

㧤㧚㜞⸘ᢙ₸࡮㜞ᬌ಴ല₸శሶᬌ಴ེࠍ⋡ᜰߒߚ
⾍ࠅวࠊߖඨዉ૕⚛ሶߩ㐿⊒Development of Bonded Semiconductor Device
for High Counting Rate High Efficiency Photon Detectors
␹㊁㇚ᄦ
Ikuo Kanno੩ㇺᄢቇᄢቇ㒮Ꮏቇ⎇ⓥ⑼Graduate School of Engineering, Kyoto University᭎ⷐ X ✢ߩࠛࡀ࡞ࠡ࡯ࠍ᷹ቯߔࠆߎߣߢ‫ޔ‬ක≮⸻ᢿߦ߅ߌࠆૐⵍᦑൻࠍ⋡ᜰߒߡ޿ࠆ‫ߦ߼ߚߩߎޕ‬ߪ‫ޔ‬㜞⸘ᢙ₸ߢࠛࡀ࡞ࠡ࡯᷹ቯ߇น⢻ߥ᡼኿✢ᬌ಴ེߩ㐿⊒߇ᔅⷐߢ޽ࠆ‫ⶄޔߢߎߘޕ‬ᢙߩඨዉ૕ࠍធวߒ‫ޔ‬X ✢ߩๆ෼૕ㇱߣᬌ಴ㇱߣࠍࠊߌߚᬌ಴ེࠍ⵾૞ߔࠆߚ߼ߩၮ␆⎇ⓥߣߒߡ‫ޔ‬Si ߩធวࠍⴕߞߚ‫ޕ‬
ធว Si ߩ⇇㕙Ყᛶ᛫୯⹏ଔࠍ 4 ┵㊎ᴺߦࠃࠆ᷹ቯߣࡕ࠺࡞⸘▚ߣࠍ↪޿ߡⴕߞߚ‫ޕ‬߹ߚ‫ޔ‬㜞Ყᛶ᛫୯ߩ p ဳ‫ޔ‬n ဳ Si ߩធวࠍⴕߞߚ‫ޕ‬ធวߒߚ pn-Si ⚛ሶߩ࠳ࠗࠝ࡯࠼ߣߒߡߩᛶ
᛫୯ߪ 0.7 Mȍ ߢ޽ࠅ‫ࠆߥࠄߐޔ‬ᛶ᛫୯ߩะ਄߇ᔅⷐߢ޽ࠆ‫ޕ‬We are trying to decrease dose exposure in medical diagnosis by way of measuring the energy of X-rays.
For this purpose, radiation detectors for X-ray energy measurement with high counting rate should be
developed. Direct bonding of Si wafers was carried out to make a radiation detector, which had separated
X-ray absorber and detector.

The resistivity of bonding interface was estimated with the results offour-probe measurements and model calculations. Direct bonding of high resistivity p and n-Si wafers
was also performed. The resistance of the pn bonded diode was 0.7 Mȍ. The resistance should be
increased in the future.
1. ⎇ⓥ⋡⊛ේሶജ࡮᡼኿✢ᛛⴚߩᔕ↪ߩ৻ߟߣߒߡ‫ޔ‬X ✢‫ߚ޿↪ࠍ✢ࡑࡦࠟޔ‬ක≮⸻ᢿ‫ߡߒߘޔ‬㓁ሶ✢߿㊀☸ሶ✢ࠍ↪޿ߚ≸ᴦ≮ߥߤ߇⋓ࠎߦߥߞߡ߈ߡ޿ࠆ‫ޕ‬ᴦ≮ᛛⴚ߇㜞ᐲߦߥࠆߦㅪࠇ‫ޔ‬ᴦ≮ߦᣈߌࠆૐⵍᦑൻߩേ߈߇಴ߡ߈ߚ߇‫ޔ‬X ✢ㅘㆊ᠟ᓇ߿ CT ᬌᩏߢ≸ࠍ⸻ᢿߔࠆ㓙ߩૐⵍᦑൻ߽⎇ⓥߔࠆᔅⷐ߇޽ࠆ‫߼ߚߩߎޕ‬ᚒ‫⃻ޔߪޘ‬࿷ⴕࠊࠇߡ޿ࠆ X ✢ߩ㔚ᵹ᷹ቯߦࠃࠆ᠟௝ߢߪߥߊ‫ޔ‬X ✢ߩࠛࡀ࡞ࠡ࡯ᖱႎࠍ೑↪ߒߚ᠟௝ࠍឭ᩺ߒߡ޿ࠆ[1,2,3]‫࡯ࠡ࡞ࡀࠛޕ‬ᖱႎࠍ೑↪ߔࠆߎߣߦࠃࠅ‫ޔ‬ૐⵍᦑൻ߇ታ⃻ߢ߈ࠆ⷗ㅢߒߪ┙ߞߚ߇‫࡯ࠡ࡞ࡀࠛޔ‬᷹ቯࠍ㜞⸘ᢙ₸ߢⴕ߁ᔅⷐ߇޽ࠆ‫৻ޕ‬ᣇ‫ޔ‬ⵍᬌ૕ߢ޽ࠆੱ㑆ࠍㅢㆊߒߡ X ✢ᬌ಴ེߦ౉኿ߒߚ X ✢ࠍߢ߈ࠆߛߌ㜞޿ല₸ߢ᷹ቯߔࠆߎߣ߽‫ޔ‬ૐⵍᦑൻߦߪਇนᰳߢ޽ࠆ‫ޕ‬㜞ല₸ߢߩ᷹ቯߦߪᬌ಴ེߩๆ෼૕߇ෘ޿ߎߣ߇ᦸ߹ߒ޿߇‫ޔ‬ๆ෼૕ߩౝㇱࠍ㔚⩄߇⒖േߒߡ޿ࠆ㑆ߪᰴߩ X ✢ࠍ᷹ቯߔࠆߎߣ߇ߢ߈ߕ‫⸘ޔ‬ᢙ₸߇ૐਅߔࠆ‫ߩߎޕ‬− 41 −

JAEA-Review 2007-049⋧෻ߔࠆ᧦ઙࠍḩߚߔߚ߼ߦ‫ޔ‬ๆ෼૕ߣᬌ಴ㇱߣࠍࠣ࡝࠶࠼ߦࠃߞߡಽഀߔࠆඨዉ૕ᬌ಴ེࠍ⠨᩺ߒߚ[4]‫ޔߜࠊߥߔޕ‬ๆ෼૕ㇱಽࠍෘߊߔࠆߎߣߢ X ✢ߩๆ෼⏕₸ࠍ㜞ߊߔࠆ߇‫ޔ‬X ✢ߩࠛࡀ࡞ࠡ࡯᷹ቯߪࠣ࡝࠶࠼ࠍㅢㆊߒߚ㔚ሶ߇㓁ᭂߦߚߤࠅ⌕ߊ㑆ߦ⺃⿠ߔࠆ㔚࿶ߦࠃߞߡⴕ߁‫ߚߩߎޕ‬߼‫࠼࠶࡝ࠣޔ‬㧙㓁ᭂ㑆ߩ〒㔌ࠍ⍴ߊߔࠆߎߣߦࠃࠅ‫ޔ‬㜞⸘ᢙ₸ࠍ㆐ᚑߔࠆߎߣ߇ߢ߈ࠆ‫ⶄޕ‬ᢙߩX ✢߇ෘ޿ๆ෼૕ߩ޽ߜߎߜߢๆ෼ߐࠇ㔚ሶ⟲‫ޔ‬ᱜሹ⟲ࠍ↢ᚑߒߚ႐วߢ߽‫ޔ‬వߦࠣ࡝࠶࠼ࠍㅢ
ㆊߒߚ㔚ሶ⟲߇᷹ቯߐࠇ‫ޔ‬หᤨߦࠣ࡝࠶࠼㧙㒶ᭂ㑆ࠍ⒖േߒߡ޿ࠆઁߩ㔚ሶ⟲‫ޔ‬ᱜሹ⟲ߦߪ‫ޔ‬ᓇ㗀ࠍਈ߃ߥ޿‫ߥ߁ࠃߩߎޕ‬ᬌ಴ེࠍ⵾૞ߔࠆߚ߼ߦߪ‫ⶄޔ‬ᢙߩඨዉ૕ࠍធวߔࠆᔅⷐ߇޽ࠅ‫ޔ‬ធวߒߚඨዉ૕㑆ߢ㔚ሶ߿ᱜሹߩ⒖േ߇ⴕࠊࠇࠆᔅⷐ߇޽ࠆ‫ޔߕ߹ޔ߼ߚߩߎޕ‬p ဳ Si ߣ n ဳ Si ߣ
ࠍ⾍ࠅวࠊߖߚ⚛ሶࠍ⵾૞ߒ‫ ߡߞࠃߦࠇߎޔ‬X ✢߇᷹ቯߢ߈ࠆߎߣࠍታ⸽ߔࠆ‫ޕ‬
2. ⎇ⓥౝኈ߅ࠃ߮⚿ᨐ ⴫㕙ᵴᕈൻᴺߦࠃࠅ‫ޔ‬㜞Ყᛶ᛫୯ p ဳ Si ߣ n ဳ Si ߣࠍ⾍ࠅวࠊߖࠆ‫⴫ޕ‬㕙ᵴᕈൻᴺߣߪ‫ޔ‬Arߥߤߩਛᕈࠟࠬࡆ࡯ࡓߦࠃߞߡ‫ ߪߢߎߎ(⾰‛ޔ‬Si ߥߤߩඨዉ૕)ߩ⴫㕙ߩ㉄ൻ⤑ߥߤਇ⚐‛ࠍ㒰෰ߒ‫ࠍ⾰‛ޔ‬᭴ᚑߔࠆේሶߩ޿ࠊࠁࠆ㔚ሶ⚿วᚻࠍᵴᕈൻߒ‫⁁ߩߎޔ‬ᘒߢੑߟߩᐔမߥ‛⾰ࠍኒ⌕ߐߖࠆߎߣߦࠃߞߡធวࠍⴕ߁ᣇᴺߢ޽ࠆ‫ᧄޕ‬ᚻᴺߪ‫ޔ‬1996 ᐕߎࠈߦ㐿⊒ߐࠇ‫ޔ‬ਥߦዊߐߥ Si⚛ሶࠍᄢ߈ߥ Si ࠙ࠛࡂߩ਄ߦ㈩⟎ߔࠆߚ߼ߦ↪޿ࠄࠇߡ߈ߚ‫ޔ߼ߚߩߎޕ‬ធวᒝᐲߩ⎇ⓥ߇⋓ࠎߦⴕࠊࠇ‫ޔ‬ធว⇇㕙ߪᲣ᧚ߣห᭽ߩᒝᐲࠍᜬߟߎߣ߇ႎ๔ߐࠇߚ[5]‫ޕ‬ᚒ‫ޔߪ⊛⋡ߩޘ‬ធวߒߚෘ޿ๆ෼૕ߢ↢ᚑߐࠇߚ㔚ሶࠍ⭯޿ᬌ಴ㇱඨዉ૕߳⒖േߐߖࠆߎߣ߇
⋡⊛ߢ޽ࠆ‫ޔߕ߹ޔߦ߼ߚߩߎޕ‬ធว⇇㕙ߩᲧᛶ᛫୯ࠍ⹏ଔߔࠆߚ߼ߦ‫ޔ‬Ყᛶ᛫୯߇ 0.02 (Class 1)‫ޔ‬
0.2 (Class 2)߅ࠃ߮ 2 ȍcm(Class 3)ߩ n ဳ Si ࠍ↪޿‫ޔ‬3 ㅢࠅߩ⚵ߺวࠊߖߢធวߒߚ‫ޕ‬ធว⇇㕙ߩ⹏ଔᴺߦߪ‫࠼࠶࡟ࡊࠬޔ‬ᛶ᛫(SR)ᴺ‫ޔ‬㔚ᵹ㧙㔚࿶(I-V)ᴺ‫ޔ‬㔚᳇ኈ㊂㧙㔚࿶(C-V)ᴺ‫ޔ‬㔚᳇ኈ㊂ㆊᷰಽశ(DLTS)ᴺߥߤ߇޽ࠆ‫ޕ‬SR ᴺߦ߅޿ߡߪ‫ޔ‬ធวߒߚ Si ࠍ⭯޿ⷺᐲߢ೥ࠅ‫⇇ޔ‬㕙ࠍ㔺಴ߒߡࠞࡦ࠴࡟ࡃ࡯ߢᛶ᛫୯ࠍ᷹ቯߔࠆ‫⇇ޔ߼ߚߩߎޕ‬㕙ࠍ⹏ଔߒߚᓟߦ᡼኿✢ᬌ಴ེߣߒ
ߚ޿ᧄ⎇ⓥߦߪਇㆡߢ޽ࠆ‫ޕ‬I-V ᴺ‫ޔ‬C-V ᴺ߅ࠃ߮ DLTS ᴺߪ‫ߦ߽ߣޔ‬ធว⚛ሶߦ㔚ᭂࠍ૞ᚑߔࠆ
ᔅⷐ߇޽ࠅ‫ޔ‬᷷ᐲࠍᄌൻߐߖߡࠕ࠾࡯࡞ߒ‫ޔ‬5ߘߩ⇇㕙ߦኻߔࠆᓇ㗀ࠍ᷹ቯߔࠆ਄ߢਇะ
߈ߢ޽ࠆ‫ޔߚ߹ޕ‬C-V ᴺ‫ޔ‬DLTS ᴺߦ߅޿౉ࠇࠆᔅⷐ߇޽ࠆ‫⎇ᧄޕ‬ⓥߢ↪޿ࠆ Si ࠙ࠛࡂߪ᡼኿✢ᬌ಴ེ↪ߦෘߐ߇ 0.5 mm ⒟ᐲ
ߣߒߚ߽ߩߢ޽ࠆߚ߼‫ޔ‬ⓨਲጀࠍ᜛ߍࠆߎ
ߣߪ࿎㔍ߢ޽ࠆ‫ޕ‬એ਄ߩࠃ߁ߥ⠨ኤ߆ࠄ‫ޔ‬ᧄ⎇ⓥߦ߅޿ߡߪ‫ޔ‬ඨዉ૕࠙ࠛࡂߩᲧᛶ᛫

Resistivity (:cm)ߡߪ‫ޔ‬ⓨਲጀࠍ᜛ߍ‫⇇ޔ‬㕙ࠍⓨਲጀߩਛߦ

4
3
2
Class 3 on 1 A
Class 3 on 1 BClass 3 on 1 C
Class 3 on 1 D

1୯᷹ቯߦ৻⥸⊛ߢ޽ࠅ‫ޔ‬ඨዉ૕⴫㕙ߦ㔚ᭂࠍ૞ᚑߔࠆᔅⷐ߇ߥ޿‫ޔ‬4 ┵㊎᷹ቯᴺߢᲧ

0

0

200

400

600

Class 3Insulating
Ideal Bond

800 1000 1200oᛶ᛫୯ࠍ᷹ቯߒ‫⚿ߩߎޔ‬ᨐࠍ↪޿ߡ⇇㕙ᲧTemperature ( C)ᛶ᛫୯ࠍ⹏ଔߔࠆߎߣߣߒߚ‫ޕ‬  ࿑ 1 0.02 ȍcm(Class 1)ߣ 2 ȍcm(Class 3)ߩ
Class 1 ߅ࠃ߮ 3 ߩ n ဳ Si ࠍធวߒ‫ޔ‬ቶ᷷   Si ធว⚛ሶߩᲧᛶ᛫୯ߩ᷷ᐲᄌൻ‫ޕ‬− 42 −

JAEA-Review 2007-049

߆ࠄ 1000 ͠߹ߢ‫ߚߒ࡞࡯࠾ࠕޔ‬ᓟߦ᷹ቯߒߚᲧᛶ᛫୯ࠍ࿑ 1 ߦ␜ߔ‫ޕ‬᷹ቯߪ‫ޔ‬Class 3 ߩ Si ߦ┵㊎ࠍᒰߡߡⴕߞߚ‫ޕ‬Class 1 ߣ 3 ࠍធวߒߚ⚛ሶ A‫ޔ‬B‫ޔ‬C‫ ߮ࠃ߅ޔ‬D ߩᲧᛶ᛫୯ߣ‫ޔ‬Class 3 ߩ Si
ࠍ৻ᨎߢᲧᛶ᛫୯᷹ቯߒߚ⚿ᨐ‫ߡߒߘޔ‬ធว⇇㕙߇⛘✼૕ߩ႐วߩᲧᛶ᛫୯ࠍ␜ߒߡ޽ࠆ‫ޕ‬4 ⚵ߩធว⚛ሶߩਛߢ‫ޔ‬C ߪቶ᷷⁁ᘒ߆ࠄ⇇㕙߇⛘✼૕ߦㄭߊ‫࡞࡯࠾ࠕߪࠇߎޔ‬᷷ᐲࠍᄌ߃ߡ߽ᄌࠊ
ࠄߥ߆ߞߚ‫ ߩ߆߶ߩߎޕ‬A‫ޔ‬B ߘߒߡ D ߪ‫ޔ‬ቶ᷷ߢߪ‫⇇ޔ‬㕙ߩᲧᛶ᛫୯߇ዊߐ޿ߣផኤߢ߈ࠆ߇‫ޔ‬ࠕ࠾࡯࡞᷷ᐲ߇ 600 ͠એ਄ߢ⇇㕙߇⛘✼૕ߦㄭߊߥߞߚ‫࡞࡯࠾ࠕޕ‬᷷ᐲ߇ 1000 ͠ߦߥࠆߣ‫⇇ޔ‬㕙Ყᛶ᛫୯߇ᐞಽዊߐߊߥߞߚߎߣ߇ಽ߆ࠆ‫ޕ‬
4 ┵㊎᷹ቯߩ⚿ᨐ߆ࠄ‫⇇ޔ‬㕙Ყᛶ᛫୯ߩ߅ࠃߘߩᄌൻߪផኤߢ߈ࠆ߇‫ޔ‬ታ㓙ߦ⇇㕙Ყᛶ᛫୯ߩ
୯ࠍࡕ࠺࡞⸘▚ࠍ↪޿ߡ⹏ଔߒߚ‫࠺ࡕߩߎޕ‬࡞ߪ‫ޔ‬Class 1 ߣ 3 ߩ Si ߩߘࠇߙࠇ߇ 4 ┵㊎ߦᴪߞߚᓸዊᛶ᛫ߩㅪ⚿ߢߢ߈ߡ޿ࠆߣߒ‫ޔ‬
਄ਅߩ Si 㑆߽ߘߩ〒㔌ߦᲧ଀ߒߚᓸዊᛶ᛫
ߢ⚿วߒߡ޿ࠆ‫⇇ޔߚ߹ޕ‬㕙ߩᛶ᛫߽ߎߩ਄
ਅ㑆ߩㅪ⚿ᛶ᛫ߦ฽߹ࠇࠆ‫ߩ࡞࠺ࡕߩߎޕ‬᭎⇛ࠍ࿑ 2 ߦ␜ߔ‫ߩߎޕ‬ᓸዊᛶ᛫ߦᵹࠇࠆ㔚ᵹࠍࠠ࡞ࡅࡎ࠶ࡈߩᴺೣࠍ⸃ߊߎߣߢ᳞߼ߚ‫ޕ‬Class 1 ߣ 3 ߩ Si ࠍធวߒߚ႐วߦߟ޿ߡ‫ޔ‬⇇㕙Ყᛶ᛫୯ߩ㑐ᢙߣߒߡߩ᷹ቯᲧᛶ᛫୯
ࠍ࿑ 3 ߦ␜ߔ‫ޕ‬࿑ 3 ߣ࿑ 1 ߣߩ❑ゲߩᲧᛶ᛫୯߆ࠄ‫⇇ޔ‬㕙Ყᛶ᛫୯ࠍ⹏ଔߔࠆߎߣ߇ߢ߈
ࠆ‫ޔߡߒߣ଀ޕ‬ቶ᷷‫ޔ‬900 ͠߅ࠃ߮ 1000 ͠ߢ   ࿑ 2 ធว Si ߩ(a)ㅪ⚿ᛶ᛫ࡕ࠺࡞ߣ(b)ࠠ࡞ࡅ
ᾲಣℂߒߚᓟߩ⇇㕙Ყᛶ᛫୯ߪ‫ߩࡈ࠶ࡎ   ⚂ࠇߙࠇߘޔ‬ᴺೣߩ㔚ᵹ࿁〝‫ޕ‬100 ȍcm‫ޔ‬8000 ȍcm‫ ߡߒߘޔ‬1000 ȍcm ߣ

5

୯⹏ଔᴺࠍ⏕┙ߒ‫ޔ‬ធวᓟ 600 ͠⒟ᐲߢࠕ࠾࡯࡞ߔࠆߣ⇇㕙ߩᲧᛶ᛫୯߇Ⴧᄢߔ
ࠆߎߣ߇ಽ߆ߞߚ[6]‫ޕ‬ᰴߦ‫ޔ‬X ✢ࠍ᷹ቯߢ߈ࠆធว Si ⚛ሶࠍ⵾૞ߔࠆߚ߼‫ޔ‬㜞Ყᛶ᛫୯ߩ p ဳ(⚂ 60kȍcm)߅ࠃ߮ n ဳ(2.5 kȍcm)ߩ Si ࠍធวߒߚ‫ޕ‬਄⸥ߩ⇇㕙Ყᛶ᛫୯ߩ⹏ଔ⚿ᨐ߆ࠄ‫⁁޿ߥࠊⴕࠍ࡞࡯࠾ࠕޔ‬ᘒߩᣇ߇⇇㕙Ყᛶ᛫୯߇ૐ޿ߚ߼‫࡞࡯࠾ࠕޔ‬ήߒߩធ

Measured Resistivity (:cm)⹏ଔߢ߈ࠆ‫⇇ޔߦ߁ࠃߩߎޕ‬㕙ߩᲧᛶ᛫

3
2
1
0

㕖✢ᒻᕈߪ⏕⹺ߢ߈ߚ‫․߽ᦨߒ߆ߒޕ‬ᕈ߇⦟޿⚛ሶ E ߦ߅޿ߡ߽ 0 V ઃㄭߩ௑߈

0

10

ว Si ⚛ሶߦᛶ᛫ᕈ㔚ᭂࠍ⵾૞ߒ I-V ᷹ቯࠍⴕߞߚ‫⚿ߩߎޕ‬ᨐ‫ޔ‬࿑ 4 ߦ␜ߔࠃ߁ߦ

Class 3 on 1
Insulating
Ideal

4

1

10

2

10

10

3

4

10

10

5

Interface Resistivity (:cm)
  ࿑ 3 ⇇㕙Ყᛶ᛫୯ߩ㑐ᢙߣߒߡߩ Class 1 ߣ  3 ߩធว Si ⚛ሶߩᲧᛶ᛫୯‫ޕ‬− 43 −

JAEA-Review 2007-049

߆ࠄ᳞߼ߚ࠳ࠗࠝ࡯࠼ߣߒߡߩᛶ᛫୯߇⚂ 0.7 Mȍ ߢ޽ࠅ‫ޔ‬᡼኿✢ᬌ಴ེߣߒߡචಽߦ⦟޿࠳ࠗࠝ
࡯࠼ߣߪߥࠄߥ߆ߞߚ‫ޕ‬3.0

ߩ pn ធวࠍ⵾૞ߒ‫ޔ‬᭽‫ߥޘ‬᷷ᐲߢࠕ࠾࡯࡞ߒ

2.5

ߚߩߜߩ⚛ሶߦᛶ᛫ᕈ㔚ᭂࠍ⵾૞ߒ‫ޔ‬I-V ᷹ቯ

2.0

Current (mA)એ೨‫ޔ‬ૐᲧᛶ᛫୯(p ဳ 10 mȍcm‫ޔ‬n ဳ 32 ȍcm)ࠍⴕߞߚ‫ߩߘޕ‬㓙‫ޔ‬600 ͠߿ 900 ͠ߢࠕ࠾࡯࡞
ߒߚ⚛ሶߢᢛᵹᕈࠍ␜ߒ‫࡯ࠝࠗ࠳ߩࠇߙࠇߘޔ‬࠼ߣߒߡߩᛶ᛫୯ߪ 5.5 kȍ‫ޔ‬24 kȍ ߢ޽ߞߚ‫ޕ‬ࠕ࠾࡯࡞ߒߥ޿ធว⚛ሶ߿ 400 ͠ࠕ࠾࡯࡞ߩ
߽ߩߪ⦟޿ I-V ․ᕈࠍ␜ߐߥ߆ߞߚ[7]‫ޕ‬ᒰᤨߪ‫ޔ‬

1.5
1.0
0.5
0.0
-0.5

⚛ሶߩ୘ᕈߦࠃࠆ߽ߩߢ޽ࠆ‫ߣޔ‬⠨߃ߡ޿ߚ‫ޕ‬

-1.0
-30

ߒ߆ߒ‫੹ޔ‬ᐕᐲߩ㜞Ყᛶ᛫୯ធว Si ⚛ሶߩ⚿⊛ߥߩߢߪߥ޿߆‫ߣޔ‬⠨߃ߡ޿ࠆ‫ޕ‬
 

-20

-10

0

10

20

30

Voltage (V)ᨐࠍ㐓ߺࠆߣ‫⇇ޔ‬㕙ߩᲧᛶ᛫୯߇㜞޿‫߁޿ߣޔ‬ߎߣ߇⦟޿࠳ࠗࠝ࡯࠼․ᕈࠍ␜ߔߚ߼ߦᧄ⾰

A
B
C
D
E

  ࿑ 4 㜞Ყᛶ᛫୯ p ဳ‫ޔ‬n ဳធว Si ⚛ሶ  ߩ㔚ᵹ㧙㔚࿶․ᕈ‫ޕ‬

3. ߹ߣ߼
㜞⸘ᢙ₸ࠍᜬߟ X ✢ࠛࡀ࡞ࠡ࡯᷹ቯ↪ᬌ಴ེࠍ㐿⊒ߔࠆၮ␆⎇ⓥߣߒߡ‫ޔ‬Si ߩធวࠍⴕߞߚ‫ޕ‬
ធว Si ߩᲧᛶ᛫୯ࠍ 4 ┵㊎ᴺߢ᷹ቯߒ‫⇇ࠅࠃߦ▚⸘࡞࠺ࡕޔ‬㕙Ყᛶ᛫୯ࠍ᳞߼ߚ‫ޔߚ߹ޕ‬㜞Ყᛶ᛫୯ߩ p ဳ Si ߣ n ဳ Si ߣࠍធวߒߚ‫ޕ‬ធว Si ⚛ሶߦᾲಣℂࠍᣉߐߕߦ㔚ᭂࠍ૞ᚑߒ‫ޔ‬I-V ᷹ቯࠍⴕߞߚߣߎࠈ‫ߩߡߒߣ࠼࡯ࠝࠗ࠳ޔ‬ᛶ᛫୯ߪ 0.7 Mȍ ߢ޽ߞߚ‫ ߪࠇߎޕ‬Si ᬌ಴ེߣߔࠆߦߪ‫ޔ‬1~2ᩴૐ޿୯ߢ޽ࠆ‫ޕ‬਄ㅀߩࠃ߁ߥធวߒߚ߹߹ߩ㜞Ყᛶ᛫୯ pn ធว⚛ሶߢߪ X ✢᷹ቯ߇࿎㔍ߢ޽ࠆߚ߼‫⃻ޔ‬࿷‫ޔ‬ᒁ߈⛯߈‫ޔ‬㜞Ყᛶ᛫୯ߩ p ဳ߅ࠃ߮ n ဳ Si ࠍ↪޿ߚធวࠍⴕߞߡ޿ࠆ‫ ⚂ޕ‬30 ୘⒟ᐲߩធว⚛ሶ߇ߢ߈ߚᓟߦ‫ޔ‬400 ͠߆ࠄ 1000 ͠߹ߢߩฦ᷷ᐲߢࠕ࠾࡯࡞ߒ‫ߩߘޔ‬ᓟ‫ޔ‬ᬌ಴ེߣߒߡടᎿߔࠆ‫ޕ‬
I-V ᷹ቯࠍⴕ޿‫⚛ߥᦸ᦭ޔ‬ሶࠍ↪޿ߡ‫ޔ‬X ✢᷹ቯࠍ⹜ߺࠆ‫ޕ‬
4. ෳ⠨ᢥ₂[1] I. Kanno, S. Maetaki, H. Aoki, S. Nomiya and H. Onabe, J. Nucl. Sci. Technol., 40, 457-463 (2003).
[2] I. Kanno, M. Takahashi, H. Aoki, and H. Onabe, Nucl. Instrum. and Meth. in Phys. Res. A567, 154-157(2006).
[3] I. Kanno, A. Uesaka, S. Nomiya, and H. Onabe, Nucl. Instrum. and Meth. in Phys. Res., A580, 534-536(2007).
[4] ಴㗿⇟ภ 2001-57743 㨬ඨዉ૕᡼኿✢ᬌ಴ེ㨭㧘␹㊁㇚ᄦ㧘የ㍿⑲᣿㧚
[5] H. Takagi: Rep. Mech. Eng. Lab., No. 189 (2000).
[6] I. Kanno, M. Yamashita, S. Nomiya and H. Onabe, Jpn. J. Appl. Phys., 45, 7938-7943 (2006).
[7] I. Kanno, A. Nakayama, S. Nomiya and H. Onabe, Jpn. J. Appl. Phys., 43, 6996-6997 (2004).

− 44 −

࿖㓙න૏♽㧔5+㧕
JAEA-Review 2007-049
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ฬ⒓⸥ภ
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