Study of annihilation behavior of positronium in porous silicon in different atmospheres
文献类型：期刊论文
| 作者 | 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
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| 刊名 | ACTA PHYSICA SINICA
 |
| 出版日期 | 2010 |
| 卷号 | 59期号:9页码:6647-6652 |
| 关键词 | positronium positron annihilation spectroscopy porous silica |
| 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 |
| 英文摘要 | 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. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Multidisciplinary |
| 研究领域[WOS] | Physics |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000281449800114 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/240089]  |
| 专题 | 高能物理研究所_多学科研究中心 高能物理研究所_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 |
| 推荐引用方式 GB/T 7714 | 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. |
入库方式： OAI收割
来源：高能物理研究所
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