Radiation effects of pyrochlore-rich synroc by heavy-ion irradiation  

作　　者：YANGJian-Wen XUYong-Jun ZHUSheng-Yun LUOShang-Geng 

机构地区：[1]ChinaInstituteofAtomicEnergy,Beijing102413

出　　处：《Nuclear Science and Techniques》2005年第2期99-101,共3页核技术（英文）

基　　金：Supported by International Atomic Energy Agency under Contract No.10637

摘　　要：Heavy-ion irradiation is commonly used to study radiation damage of high level radioactive waste (HLW) forms, but S ion was never used before. In this investigation, 100 MeV 32S ions produced by tandem accelerator was used to study radiation effects on pyrochlore-rich synroc which contained simulated actinides. The amorphization and amorphous doses were determined by X-ray diffractometer (XRD) and transmission electron microscopy /select area electron diffraction (TEM/SAED). The vacancy defects induced by heavy-ion irradiation were characterized by using positron annihilation technique (PAT). The experimental results show that the amorphous dose is 0.5 dpa, the defects produced by heavy-ion irradiation are mainly voids, and irradiation could continue to intensify the vacancy defects even after the amorphous dose was reached.Heavy-ion irradiation is commonly used to study radiation damage of high level radioactive waste (HLW) forms, but S ion was never used before. In this investigation, 100 MeV 32S ions produced by tandem accelerator was used to study radiation effects on pyrochlore-rich synroc which contained simulated actinides. The amorphization and amorphous doses were determined by X-ray diffractometer (XRD) and transmission electron microscopy /select area electron diffraction (TEM/SAED). The vacancy defects induced by heavy-ion irradiation were characterized by using positron annihilation technique (PAT). The experimental results show that the amorphous dose is 0.5 dpa, the defects produced by heavy-ion irradiation are mainly voids, and irradiation could continue to intensify the vacancy defects even after the amorphous dose was reached.

关 键 词：放射性伤害 重离子辐照度 核废弃物处理 硫离子 烧绿石 

分 类 号：TL941.11[核科学技术—辐射防护及环境保护]