中国物理B ›› 2007, Vol. 16 ›› Issue (8): 2378-2383.doi: 10.1088/1009-1963/16/8/037

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Multiple ionization of argon accompanied by electron loss and capture of 0.22--6.35 MeV Cq+ ions

陈林, 陈熙萌, 邵剑雄, 鲁彦霞, 丁宝卫, 崔莹, 高志民, 刘玉文, 杜娟, 谢江山, 孙光智, 刘兆远   

  1. Department of Modern Physics, Lanzhou University, Lanzhou 730000, China
  • 收稿日期:2006-11-10 修回日期:2006-12-16 出版日期:2007-08-20 发布日期:2007-08-20
  • 基金资助:
    Project supported by the Special Program for Key Basic Research of the Ministry of Science and Technology, China (Grant No 2002CCA00900).

Multiple ionization of argon accompanied by electron loss and capture of 0.22--6.35 MeV Cq+ ions

Chen Lin(陈林), Chen Xi-Meng(陈熙萌)† , Shao Jian-Xiong(邵剑雄), Lu Yan-Xia(鲁彦霞), Ding Bao-Wei(丁宝卫), Cui Ying(崔莹), Gao Zhi-Min(高志民), Liu Yu-Wen(刘玉文), Du Juan(杜娟), Xie Jiang-Shan(谢江山), Sun Guang-Zhi(孙光智), and Liu Zhao-Yuan(刘兆远）   

  1. Department of Modern Physics, Lanzhou University, Lanzhou 730000, China
  • Received:2006-11-10 Revised:2006-12-16 Online:2007-08-20 Published:2007-08-20
  • Supported by:
    Project supported by the Special Program for Key Basic Research of the Ministry of Science and Technology, China (Grant No 2002CCA00900).

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摘要： In this paper a projectile ions--recoil ions coincidence technique is employed to investigate the target ionization and projectile charge state changing processes in the collision of 0.22--6.35 MeVCq+(q = 1-4) ions with argon atoms. The partial cross section ratios of the double, triple, quadruplicate ionization to the single ionization (or the single capture) of argon associated with single electron loss (or single electron capture) by the projectile are measured and compared with the previous experimental results. In the present experiment, it is observed that the ratios of ionization cross sections R associated with single loss and single capture depend strongly on the projectile charge state and vary significantly with different reaction channels as impact energy increases. In addition, this paper gets empirical scaling laws for the ionization cross section ratios R corresponding to the projectile single loss and finds that the ratios of the double ionization to the single ionization associated with single electron capture remain constant in the present energy range.

关键词: multiple ionization, electron loss, electron capture, ion-atom collisions

Abstract: In this paper a projectile ions--recoil ions coincidence technique is employed to investigate the target ionization and projectile charge state changing processes in the collision of 0.22--6.35 MeV Cq+(q = 1-4) ions with argon atoms. The partial cross section ratios of the double, triple, quadruplicate ionization to the single ionization (or the single capture) of argon associated with single electron loss (or single electron capture) by the projectile are measured and compared with the previous experimental results. In the present experiment, it is observed that the ratios of ionization cross sections R associated with single loss and single capture depend strongly on the projectile charge state and vary significantly with different reaction channels as impact energy increases. In addition, this paper gets empirical scaling laws for the ionization cross section ratios R corresponding to the projectile single loss and finds that the ratios of the double ionization to the single ionization associated with single electron capture remain constant in the present energy range.

Key words: multiple ionization, electron loss, electron capture, ion-atom collisions

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) 82.30.Cf (Atom and radical reactions; chain reactions; molecule-molecule reactions)