中国物理B ›› 2004, Vol. 13 ›› Issue (10): 1679-1683.doi: 10.1088/1009-1963/13/10/018

• • 上一篇    下一篇

Transfer ionization of the isocharge sequence ion and Ar collisions

陈熙萌1, 蔡晓红2, 于得洋2, 曹柱荣2, 卢荣春2, 杨威2, 邵曹杰2   

  1. (1)Department of Modern Physics, Lanzhou University, Lanzhou 730000, China; (2)Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
  • 收稿日期:2003-12-15 修回日期:2004-06-01 出版日期:2004-10-20 发布日期:2005-06-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10134010, 10375080 and 10304019).

Transfer ionization of the isocharge sequence ion and Ar collisions

Cai Xiao-Hong (蔡晓红)a, Yu De-Yang (于得洋)a, Cao Zhu-Rong (曹柱荣)a, Lu Rong-Chun (卢荣春)a, Yang Wei (杨威)a, Shao Cao-Jie (邵曹杰)a, Chen Xi-Meng (陈熙萌)b   

  1. a Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; b Department of Modern Physics, Lanzhou University, Lanzhou 730000, China
  • Received:2003-12-15 Revised:2004-06-01 Online:2004-10-20 Published:2005-06-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10134010, 10375080 and 10304019).

PDF (PC)

510

赞

摘要： The ratios of transfer ionization to single capture for isocharge C^{q+}, N^{q+}, O^{q+}, Ne^{q+} ions on Ar atoms are measured by using position-sensitive and time-of-flight techniques. It is found that the ratio R_{1} increases with nuclear charge Z in a q=4 sequence, and the ratio R_{1} sequences have the minimum values at Z=7 and Z=8 in q=5 and q=6 sequences, respectively, and the ratio R_{1} decreases with the increase in the nuclear charge Z in a q=7 sequence. The results may be explained within the frame of the statistical model. It may be concluded that the transfer ionization depends remarkably upon the electronic structure of the projectile. The projectiles used in this study have the same charge state and velocity, but different electronic structures. The dependence of the ratio R_{1} on q is studied for Ne^{q+}-Ar collisions. The ratio R_{1} is found to increase as q increases for Ne^{q+}－Ar collisions. The measured dependence of the ratio R_{1} on q is compared with the calculation using the molecular Coulomb over-barrier model.

关键词: charge transfer, transfer ionization

Abstract: The ratios of transfer ionization to single capture for isocharge C$^{q+}$, N$^{q+}$, O$^{q+}$, Ne$^{q+}$ ions on Ar atoms are measured by using position-sensitive and time-of-flight techniques. It is found that the ratio $R_{1}$ increases with nuclear charge $Z$ in a $q=4$ sequence, and the ratio $R_{1}$ sequences have the minimum values at $Z=7$ and $Z=8$ in $q=5$ and $q=6$ sequences, respectively, and the ratio $R_{1}$ decreases with the increase in the nuclear charge $Z$ in a $q=7$ sequence. The results may be explained within the frame of the statistical model. It may be concluded that the transfer ionization depends remarkably upon the electronic structure of the projectile. The projectiles used in this study have the same charge state and velocity, but different electronic structures. The dependence of the ratio $R_{1}$ on q is studied for Ne$^{q+}$-Ar collisions. The ratio $R_{1}$ is found to increase as q increases for Ne$^{q+}$－Ar collisions. The measured dependence of the ratio $R_{1}$ on q is compared with the calculation using the molecular Coulomb over-barrier model.

Key words: charge transfer, transfer ionization

中图分类号:  (Electronic excitation and ionization of atoms (including beam-foil excitation and ionization))

  • 34.50.Fa
34.70.+e (Charge transfer) 34.10.+x (General theories and models of atomic and molecular collisions and interactions (including statistical theories, transition state, stochastic and trajectory models, etc.))