Pickoff and spin conversion of orthopositronium in oxygen
文献类型：期刊论文
| 作者 | Shinohara, N; Suzuki, N; Chang, T; Hyodo, T |
| 刊名 | PHYSICAL REVIEW A
 |
| 出版日期 | 2001 |
| 卷号 | 64期号:4页码:42702 |
| 通讯作者 | RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan ; Acad Sinica, Inst High Energy Phys, Beijing 100080, Peoples R China ; Univ Tokyo, Coll Arts & Sci, Inst Phys, Meguro Ku, Tokyo 1538902, Japan ; Univ Tokyo, Coll Arts & Sci, Inst Phys, Meguro Ku, Tokyo 1538902, Japan |
| 英文摘要 | The quenching processes of the thermalized orthopositronium (o-Ps) on an oxygen molecule have been studied by the positron annihilation age-momentum correlation technique. The Doppler-broadening spectrum of the 511-kev gamma rays from the 2 gamma annihilation of o-Ps in O-2 has been measured as a function of the o-Ps age. The rate of the quenching, consisting of the pickoff and the spin conversion, is estimated from the positron lifetime spectrum. The ratio of the pickoff quenching rate to the spin-conversion rate is deduced from the Doppler broadening of the 511-kev gamma rays from the annihilation of the o-Ps. The pickoff parameter (1)Z(eff), the effective number of the electrons per molecule that contribute to the pickoff quenching, for O-2 is determined to be 0.6+/-0.4. The cross section for the elastic spin-conversion quenching is determined to be (1.16+/-0.01) x 10(-19) cm(2). |
| 学科主题 | Optics; Physics |
| 类目[WOS] | Optics ; Physics, Atomic, Molecular & Chemical |
| 研究领域[WOS] | Optics ; Physics |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000171609900056 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/240607]  |
| 专题 | 高能物理研究所_多学科研究中心 |
| 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 | Shinohara, N,Suzuki, N,Chang, T,et al. Pickoff and spin conversion of orthopositronium in oxygen[J]. PHYSICAL REVIEW A,2001,64(4):42702. |
| APA | Shinohara, N,Suzuki, N,Chang, T,&Hyodo, T.(2001).Pickoff and spin conversion of orthopositronium in oxygen.PHYSICAL REVIEW A,64(4),42702. |
| MLA | Shinohara, N,et al."Pickoff and spin conversion of orthopositronium in oxygen".PHYSICAL REVIEW A 64.4(2001):42702. |
入库方式： OAI收割
来源：高能物理研究所
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