Slow isocharged sequence ions with helium collisions: Projectile core dependence
文献类型：期刊论文
| 作者 | Yu, Deyang; Cai, Xiaohong; Lu, Rongchun; Ruan, Fangfang; Shao, Caojie; Zhang, Hongqiang; Cui, Ying; Lu, Jun; Xu, Xu; Shao, Jianxiong |
| 刊名 | PHYSICAL REVIEW A
 |
| 出版日期 | 2007-08-01 |
| 卷号 | 76期号:2页码:10 |
| ISSN号 | 1050-2947 |
| DOI | 10.1103/PhysRevA.76.022710 |
| 英文摘要 | The collisions of the isocharged sequence ions of q=6 (C6+, N6+, O6+, F6+, Ne6+, Ar6+, and Ca6+), q=7 (F7+, Ne7+, S7+, Ar7+, and Ca7+), q=8 (F8+, Ne8+, Ar8+, and Ca8+), q=9 (F9+, Ne9+, Si9+, S9+, Ar9+, and Ca9+) and q=11 (Si11+, Ar11+, and Ca11+) with helium at the same velocities were investigated. The cross-section ratios of the double-electron transfer (DET) to the single-electron capture (SEC) sigma(DET)/sigma(SEC) and the true double-electron capture (TDC) to the double-electron transfer sigma(TDC)/sigma(DET) were measured. It shows that for different ions in an isocharged sequence, the experimental cross-section ratio sigma(DET)/sigma(SEC) varies by a factor of 3. The results confirm that the projectile core is another dominant factor besides the charge state and the collision velocity in slow (0.35-0.49v(0); v(0) denotes the Bohr velocity) highly charged ions (HCIs) with helium collisions. The experimental cross-section ratio sigma(DET)/sigma(SEC) is compared with the extended classical over-barrier model (ECBM) [A. Barany , Nucl. Instrum. Methods Phys. Res. B 9, 397 (1985)], the molecular Coulombic barrier model (MCBM) [A. Niehaus, J. Phys. B 19, 2925 (1986)], and the semiempirical scaling laws (SSL) [N. Selberg , Phys. Rev. A 54, 4127 (1996)]. It also shows that the projectile core properties affect the initial capture probabilities as well as the subsequent relaxation of the projectiles. The experimental cross-section ratio sigma(TDC)/sigma(DET) for those lower isocharged sequences is dramatically affected by the projectile core structure, while for those sufficiently highly isocharged sequences, the autoionization always dominates, hence the cross-section ratio sigma(TDC)/sigma(DET) is always small. |
| WOS关键词 | HIGHLY-CHARGED IONS ; SELECTIVE ELECTRON-CAPTURE ; TRANSFER CROSS-SECTIONS ; LOW-ENERGY COLLISIONS ; TRANSFER-EXCITATION ; SINGLE-ELECTRON ; 2-ELECTRON TRANSITIONS ; NE10++HE COLLISIONS ; TRANSFER IONIZATION ; ATOM COLLISIONS |
| WOS研究方向 | Optics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000249154900079 |
| 出版者 | AMER PHYSICAL SOC |
| 公开日期 | 2010-10-29 |
| 源URL | [http://ir.imp.cas.cn/handle/113462/5899]  |
| 专题 | 近代物理研究所_近代物理研究所知识存储（2010之前） |
| 通讯作者 | Yu, Deyang |
| 作者单位 | 1.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 2.Lanzhou Univ, Dept Modern Phys, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Deyang,Cai, Xiaohong,Lu, Rongchun,et al. Slow isocharged sequence ions with helium collisions: Projectile core dependence[J]. PHYSICAL REVIEW A,2007,76(2):10. |
| APA | Yu, Deyang.,Cai, Xiaohong.,Lu, Rongchun.,Ruan, Fangfang.,Shao, Caojie.,...&Liu, Zhaoyuan.(2007).Slow isocharged sequence ions with helium collisions: Projectile core dependence.PHYSICAL REVIEW A,76(2),10. |
| MLA | Yu, Deyang,et al."Slow isocharged sequence ions with helium collisions: Projectile core dependence".PHYSICAL REVIEW A 76.2(2007):10. |
入库方式： OAI收割
来源：近代物理研究所
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