中国物理B ›› 2005, Vol. 14 ›› Issue (9): 1803-1807.doi: 10.1088/1009-1963/14/9/020

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Ion source effect on the bond length of 4HeH+

缪竞威, 王虎, 朱洲森, 杨朝文, 师勉恭, 唐阿友, 缪蕾, 许祖润, 袁学东, 刘晓东, 杨百方   

  1. Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China; The Key Laboratory of Radiation Physics and Technology of Education Ministry, Chengdu 610064, China
  • 收稿日期:2004-12-24 修回日期:2005-05-16 出版日期:2005-09-20 发布日期:2005-09-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10175041 and 10375040).

Ion source effect on the bond length of 4HeH+

Miao Jing-Wei (缪竞威), Wang Hu (王虎), Zhu Zhou-Sen (朱洲森), Yang Chao-Wen (杨朝文), Shi Mian-Gong (师勉恭), Tang A-You (唐阿友), Miao Lei (缪蕾), Xu Zu-Run (许祖润), Yuan Xue-Dong (袁学东), Liu Xiao-Dong (刘晓东), Yang Bei-Fang (杨百方)   

  1. Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China; The Key Laboratory of Radiation Physics and Technology of Education Ministry, Chengdu 610064, China
  • Received:2004-12-24 Revised:2005-05-16 Online:2005-09-20 Published:2005-09-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10175041 and 10375040).

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摘要： The bond length of ^{4}HeH^{+} resulting from collision-induced destruction is measured at 1.4420 MeV using the Coulomb Explosion Technique. The measured bond length of ^4HeH^+ is 0.094\pm 0.003nm. The bond length of ^{4}HeH^{+} obtained with our radio frequency (RF) ion source is larger than that obtained with a duoplasmatron ion source at Argonne National Laboratory (ANL), but the bond lengths of H_{2}^{+} and H_{3}^{+}obtained separately by ANL and by us with the two different ion sources are consistent with each other, which implies that there exists an ion source effect on the bond length of ^{4}HeH^{+}. The main reason why the ^{4}HeH^{+} bond lengths obtained by the two different ion sources are different is also discussed.

关键词: ion source effect, ^{4}HeH^{+}, formation mechanism, bond length

Abstract: The bond length of 4HeH+ resulting from collision-induced destruction is measured at 1.4420 MeV using the Coulomb Explosion Technique. The measured bond length of 4HeH+ is 0.094\pm 0.003nm. The bond length of 4HeH+ obtained with our radio frequency (RF) ion source is larger than that obtained with a duoplasmatron ion source at Argonne National Laboratory (ANL), but the bond lengths of H2+ and H3+ obtained separately by ANL and by us with the two different ion sources are consistent with each other, which implies that there exists an ion source effect on the bond length of 4HeH+. The main reason why the 4HeH+ bond lengths obtained by the two different ion sources are different is also discussed.

Key words: ion source effect, 4HeH+, formation mechanism, bond length

中图分类号:  (Interatomic distances and angles)

  • 33.15.Dj
37.20.+j (Atomic and molecular beam sources and techniques) 33.15.Fm (Bond strengths, dissociation energies)