1995 Fiscal Year Annual Research Report

高エネルギー粒子線照射における反跳エネルギー効果の研究

Research Project

Project/Area Number	05402049
Research Institution	Nagoya University
Principal Investigator	桐谷道雄名古屋大学, 工学部, 教授 (70033826)
Co-Investigator(Kenkyū-buntansha)	佐藤裕樹名古屋大学, 工学部, 助手 (20211948) 井関道夫名古屋大学, 工学部, 助教授 (70023124)
Keywords	高エネルギー粒子照射 / 核融合中性子照射 / 核分裂炉照射 / イオン照射 / 電子照射 / 照射損傷 / 反跳エネルギー / 統計的揺らぎ現象
Research Abstract	カスケード衝突から発生する点欠陥集合体は極めて微細であるためそのタイプの同定が困難であったが、名古屋大学超高圧電子顕微鏡室に放射線管理区域を設定できた事で中性子照射した試料の電子照射実験が可能となり、電子照射下での欠陥の動的挙動から個々の欠陥のタイプを的確に判定する事ができるようになった。強力中性子源(RTNS-II)により核融合中性子照射された試料による研究はさらに進展し、これと並行して制御された条件のもとでの材料試験炉(JMTR)による原子炉照射は交番的に温度を変化した温度変動照射、および損傷効果の蓄積過程を系統的に観るための多段多分割照射へと展開した。照射中の温度変動の効果は予想外のものがあり、また多段多分割照射の成功によりはじめて核分裂炉照射と核融合中性子照射との直接の比較が可能となった。カスケード衝突から直接発生する損傷構造の蓄積過程(照射量φ)については、初期のカスケード衝突からの衝撃の効果による段階(φ^2)から、照射量に比例した単純な段階(φ^1)を経て、自由格子間原子による動的回復の段階(φ^<1/2>)を過ぎ、幾何学的重畳による飽和の段階(1-exp(-αφ))がある事が、核融合中性子照射、核分裂炉照射および軽・重イオン照射の結果を総合する事により明かとなった。電子照射実験より得られた格子間原子微小集合体の一次元容易運動の性質の理解を、中性子照射に適用することにより、これまで理解が不可能であった結晶方位依存性や種々の転位ループ配列の規則性を理解することが可能となった。またこれも電子照射実験より明かとなった点欠陥反応の無秩序性を中性子照射に適用することにより、格子間原子集合体の成長に対する極めて小さい成功率の原因として理解するに至った。

Research Products
(24 results)

All Other

All Publications (24 results)

[Publications] M.Kiritani: "Origin of unbalanced reaction of vacancies and interstitials during irradiation with cascades and influence on microstructural evolution" Journal of Nuclear Materials. 205. 460-466 (1993)
[Publications] F.A.Garner: "Influence of details of reactor history on microstructural development during neutron irradiation" Journal of Nuclear Materials. 205. 206-218 (1993)
[Publications] T.Yoshiie: "The role of free point defects in defect structure evolution during cascade damage" Defect and Diffusion Forum. 95-98. 243- (1993)
[Publications] M.Kiritani: "Exposure time and recoil energy dependence of defect accumulation" Journal of Nuclear Materials. 206. 156-169 (1993)
[Publications] S.Arai: "Development and application of intermittent electron irradiation technique with a high voltage electron microscope" Microscopy,Microanalysis,Microstructures. 4. 305-312 (1993)
[Publications] 桐谷道雄: "電子顕微鏡法による中性子照射損傷研究の現状" 電子顕微鏡. 27. 211-218 (1993)
[Publications] Y.Satoh: "Diffraction contrast image of small stacking fault tetrahedra in fcc metals" Philosophical Magazine. A70. 869-891 (1994)
[Publications] M.Kiritani: "Microstructure evolution during radiation damage with collision cascades" The Science Reports of RITU. A40. 29-47 (1994)
[Publications] M.Kiritani: "Microstructure evolution by neutron irradiation during cyclic temperature variation" Journal of Nuclear Materials. 212-215. 241-245 (1994)
[Publications] M.Kiritani: "Formation of vacancy clustered defects from cascade collisions during heavyion irradiation and their annihilation by freely-migrating interstitials" Journal of Nuclear Materials. 212-215. 192-197 (1994)
[Publications] T.Yoshiie: "Effect of cascade localization induced bias effect and fluctuation of point defect reactions on defect structure evolution near planar sinks" Journal of Nuclear Materials. 212-215. 315-319 (1994)
[Publications] T.Yoshiie: "Factors to influence the nucleation and growth of interstitial clusters during cascade damage" Journal of Nuclear Materials. 212-215. 186-191 (1994)
[Publications] K.Hamada: "Role of solute atoms on microstructural evolution in neutron irradiated nickel" Journal of Nuclear Materials. 212-215. 270-274 (1994)
[Publications] M.Horiki: "Microstructural evolution in low-dose neutron-irradiated Fe-16Ni-15Cr alloys" Journal of Nuclear Materials. 212-215. 246-251 (1994)
[Publications] Y.Shimomura: "Experiments to examine the contribution of gas atoms to void formation in irradiated metals" Journal of Nuclear Materials. 212-215. 352-357 (1994)
[Publications] H.Fukushima: "Dependence of observed cascade defects on neutron spectrum and dose in Au and Ag irradiated with fission and fusion neutrons at low temperature" Journal of Nuclear Materials. 212-215. 154-159 (1994)
[Publications] M.Narui: "Development of controlled temperature-cycle irradiation technique in JMTR" Journal of Nuclear Materials. 212-215. 1665-1670 (1994)
[Publications] M.Narui: "Development of experimental rigs for temperature-controlled reactor irradiations for fundamental study of radiation effects on fusion meterials" Journal of Nuclear Materials. 212-215. 1645-1648 (1994)
[Publications] K.Arakawa: "Time- and space-wise stochastic fluctuation of point defect reaction in high energy particle irradiated metals" Trans.Materials Research Society of Japan. 16A. 365-370 (1994)
[Publications] T.Yoshiie: "Cocept of cascade localization induced bias effect on microstructural evolution" JCSTEA 7 SERIES SYMPOSIUM,Materials for Advanced Energy Systems & Fission and Fusion Engineering,'94,. 401-406 (1994)
[Publications] M.Kiritani: "Microstructure evolution during irradiation" Journal of Nuclear Materials. 216. 220-264 (1994)
[Publications] T.Yoshiie: "Nucleation of interstitial type dislocation loops in metals under neutron irradiation" The Science Reports of RITU. A40. 77-84 (1994)
[Publications] S.Arai: "Improvement and application of intermittent electron irradiation technique with a high voltage electron microscope" Journal of Electronmicroscopy. 44. 1-7 (1995)
[Publications] Y.Ogsawara: "Identification of the nature ofneutron-irradiation-induced small point defect clusters in nickel by means of electron irradiation and defect structure development from collision cascades" Radiation Effects and Defects in Solids. (印刷中). (1996)

1995 Fiscal Year Annual Research Report

高エネルギー粒子線照射における反跳エネルギー効果の研究

Principal Investigator

桐谷 道雄 名古屋大学, 工学部, 教授 (70033826)

Research Products

[Publications] M.Kiritani: "Origin of unbalanced reaction of vacancies and interstitials during irradiation with cascades and influence on microstructural evolution" Journal of Nuclear Materials. 205. 460-466 (1993)

[Publications] F.A.Garner: "Influence of details of reactor history on microstructural development during neutron irradiation" Journal of Nuclear Materials. 205. 206-218 (1993)

[Publications] T.Yoshiie: "The role of free point defects in defect structure evolution during cascade damage" Defect and Diffusion Forum. 95-98. 243- (1993)

[Publications] M.Kiritani: "Exposure time and recoil energy dependence of defect accumulation" Journal of Nuclear Materials. 206. 156-169 (1993)

[Publications] S.Arai: "Development and application of intermittent electron irradiation technique with a high voltage electron microscope" Microscopy,Microanalysis,Microstructures. 4. 305-312 (1993)

[Publications] 桐谷道雄: "電子顕微鏡法による中性子照射損傷研究の現状" 電子顕微鏡. 27. 211-218 (1993)

[Publications] Y.Satoh: "Diffraction contrast image of small stacking fault tetrahedra in fcc metals" Philosophical Magazine. A70. 869-891 (1994)

[Publications] M.Kiritani: "Microstructure evolution during radiation damage with collision cascades" The Science Reports of RITU. A40. 29-47 (1994)

[Publications] M.Kiritani: "Microstructure evolution by neutron irradiation during cyclic temperature variation" Journal of Nuclear Materials. 212-215. 241-245 (1994)

[Publications] M.Kiritani: "Formation of vacancy clustered defects from cascade collisions during heavyion irradiation and their annihilation by freely-migrating interstitials" Journal of Nuclear Materials. 212-215. 192-197 (1994)

[Publications] T.Yoshiie: "Effect of cascade localization induced bias effect and fluctuation of point defect reactions on defect structure evolution near planar sinks" Journal of Nuclear Materials. 212-215. 315-319 (1994)

[Publications] T.Yoshiie: "Factors to influence the nucleation and growth of interstitial clusters during cascade damage" Journal of Nuclear Materials. 212-215. 186-191 (1994)

[Publications] K.Hamada: "Role of solute atoms on microstructural evolution in neutron irradiated nickel" Journal of Nuclear Materials. 212-215. 270-274 (1994)

[Publications] M.Horiki: "Microstructural evolution in low-dose neutron-irradiated Fe-16Ni-15Cr alloys" Journal of Nuclear Materials. 212-215. 246-251 (1994)

[Publications] Y.Shimomura: "Experiments to examine the contribution of gas atoms to void formation in irradiated metals" Journal of Nuclear Materials. 212-215. 352-357 (1994)

[Publications] H.Fukushima: "Dependence of observed cascade defects on neutron spectrum and dose in Au and Ag irradiated with fission and fusion neutrons at low temperature" Journal of Nuclear Materials. 212-215. 154-159 (1994)

[Publications] M.Narui: "Development of controlled temperature-cycle irradiation technique in JMTR" Journal of Nuclear Materials. 212-215. 1665-1670 (1994)

[Publications] M.Narui: "Development of experimental rigs for temperature-controlled reactor irradiations for fundamental study of radiation effects on fusion meterials" Journal of Nuclear Materials. 212-215. 1645-1648 (1994)

[Publications] K.Arakawa: "Time- and space-wise stochastic fluctuation of point defect reaction in high energy particle irradiated metals" Trans.Materials Research Society of Japan. 16A. 365-370 (1994)

[Publications] T.Yoshiie: "Cocept of cascade localization induced bias effect on microstructural evolution" JCSTEA 7 SERIES SYMPOSIUM,Materials for Advanced Energy Systems & Fission and Fusion Engineering,'94,. 401-406 (1994)

[Publications] M.Kiritani: "Microstructure evolution during irradiation" Journal of Nuclear Materials. 216. 220-264 (1994)

[Publications] T.Yoshiie: "Nucleation of interstitial type dislocation loops in metals under neutron irradiation" The Science Reports of RITU. A40. 77-84 (1994)

[Publications] S.Arai: "Improvement and application of intermittent electron irradiation technique with a high voltage electron microscope" Journal of Electronmicroscopy. 44. 1-7 (1995)

[Publications] Y.Ogsawara: "Identification of the nature ofneutron-irradiation-induced small point defect clusters in nickel by means of electron irradiation and defect structure development from collision cascades" Radiation Effects and Defects in Solids. (印刷中). (1996)

桐谷道雄名古屋大学, 工学部, 教授 (70033826)