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中文摘要：
基于入射离子双俘获后势能沉积与双电离靶离子势能的比值定义了势能参数Ω,研究了低能高电荷态离子（q=4,5,6,7）与He原子碰撞系统中双俘获和转移电离反应道的选择规律.研究发现,在Ω坐标下,双俘获和转移电离存在截面反转效应,Ω〈1.0时双俘获为双电子转移过程主反应道,Ω≥1.0时转移电离成为双电子转移过程主反应道.
英文摘要：
Based on the potential parameter Ω,which was defined as energy deposits ratio of incidence ion with target ion after double electron capture,the selection rule between double electron capture and transfer ionization of helium target induced by Aq＋ （q = 4,5,6,7） ions was studied. It is found that there is a cross point for the cross-section ratio curve of double electron capture and transfer ionization at Ω = 1. 0,and for Ω 1. 0 the double electron capture is a key reaction channel of double electron transfer,for Ω≥1. 0 the transfer ionization is a key reaction channel of double electron transfer.
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