Depth-dependent positronium formation in gamma-irradiated polymers after 30-month aging
Yu RS(于润升); Hao XP(郝小鹏); Ma YY(马雁云); 王平(东); Qin XB(秦秀波); Zhang Z(张哲); Wang BY(王宝义); Wei L(魏龙); Yu, RS; Hao, XP; Ma, YY; Wang, P; Qin, XB; Zhang, Z; Wang, BY; Wei, L; Suzuki, T; Ito, Y; Shantarovich, VP
刊名APPLIED SURFACE SCIENCE
2008
卷号255期号:1页码:#REF!
关键词positron annihilation positronium irradiation polymer
学科分类Chemistry; Materials Science; Physics
DOI10.1016/j.apsusc.2008.05.206
通讯作者Yu, RS (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
文章类型Article; Proceedings Paper
英文摘要Depth-dependent positronium (Ps) formation and annihilation study of Co-60 gamma-irradiated polyethylene and polytetrafluorethylene were performed. After 30-month aging, no free radicals effect on Ps formation was detected for the studied polymers. Efficient trapping of back-diffusion positrons was observed in heavily irradiated samples, where Ps formation probability near polymer surface and in the bulk turns to be equivalent to each other. Results shown that positron annihilation Doppler broadening in polytetrafluorethylene is prevailingly influenced by high momentum electrons of fluorine atoms instead of Ps intensity. (c) 2008 Elsevier B.V. All rights reserved.
类目[WOS]Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
收录类别SCI
WOS记录号WOS:000259726900055
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226924
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
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Yu RS,Hao XP,Ma YY,et al. Depth-dependent positronium formation in gamma-irradiated polymers after 30-month aging[J]. APPLIED SURFACE SCIENCE,2008,255(1):#REF!.
APA 于润升.,郝小鹏.,马雁云.,王平.,秦秀波.,...&Shantarovich, VP.(2008).Depth-dependent positronium formation in gamma-irradiated polymers after 30-month aging.APPLIED SURFACE SCIENCE,255(1),#REF!.
MLA 于润升,et al."Depth-dependent positronium formation in gamma-irradiated polymers after 30-month aging".APPLIED SURFACE SCIENCE 255.1(2008):#REF!.
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