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Study of annihilation behavior of positronium in porous silicon in different atmospheres
Li ZX(李卓昕); Wang DN(王丹妮); Wang BY(王宝义); Wei L(魏龙); Qin XB(秦秀波); Li, ZX; Wang, DN; Wang, BY; Xue, DS; Wei, L; Qin, XB
2010
发表期刊ACTA PHYSICA SINICA
卷号59期号:9页码:6647-6652
通讯作者[Li Zhuo-Xin ; Wang Dan-Ni ; Wang Bao-Yi ; Wei Long ; Qin Xiu-Bo] Chinese Acad Sci, Inst High Energy Phys, Key Lab Nucl Anal Tech, Beijing 100049, Peoples R China ; [Li Zhuo-Xin ; Xue De-Sheng] Lanzhou Univ, Minist Educ, Key Lab Magnetism & Magnet Mat, Lanzhou 730000, Peoples R China
摘要Porous silicon (PS) prepared by electrochemical etching method has been studied by positron annihilation lifetime spectroscopy (PALS) and age-momentum correlation (AMOC) measurement in different atmospheres. The longest lifetime component in PALS results is ascribed to the annihilation of positronium in cavities of PS sample. It is found that 80% of the positrons implanted in PS film have formed positronium atoms. PALS results show that the lifetime of ortho-positronium has smaller value when the sample was in oxygen gas medium compared with those in other medium. AMOC results reveal that S parameter of three lifetime components in oxygen are all bigger than that in nitrogen atmosphere. These are probably caused by the oxygen leading to the spin-conversion of positronium atoms.
文章类型Article
关键词positronium positron annihilation spectroscopy porous silica
学科领域Physics
研究领域[WOS]Physics
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语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000281449800114
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被引频次:2[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/311005/240089
专题多学科研究中心
核技术应用研究中心
作者单位中国科学院高能物理研究所
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Li ZX,Wang DN,Wang BY,et al. Study of annihilation behavior of positronium in porous silicon in different atmospheres[J]. ACTA PHYSICA SINICA,2010,59(9):6647-6652.
APA 李卓昕.,王丹妮.,王宝义.,魏龙.,秦秀波.,...&Qin, XB.(2010).Study of annihilation behavior of positronium in porous silicon in different atmospheres.ACTA PHYSICA SINICA,59(9),6647-6652.
MLA 李卓昕,et al."Study of annihilation behavior of positronium in porous silicon in different atmospheres".ACTA PHYSICA SINICA 59.9(2010):6647-6652.
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