强扰动能区非全裸C^(q+),O^(q+)(q=1—4)与He原子碰撞过程中截面比的实验研究  

An experimental investigation of the cross-section ratios in the collisions of partially stripped C^(q+),O^(q+) (q=1—4)on helium atom at the strong-interaction region

作　　者：周春林[1] 邵剑雄[1] 陈熙萌[1] 高志民[1] 王俊[1] 孙光智[1] 席发元[1] 陈益峰[1] 陈林[1] 丁宝卫[1] 王兴安[1] 娄凤君[1] 徐俊奎[1] 邱玺玉[1] 王幡[1] 吕瑛[1] 

机构地区：[1]兰州大学核科学与技术学院,兰州730000

出　　处：《物理学报》2009年第8期5342-5349,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10775063)资助的课题~~

摘　　要：利用兰州大学2×1.7MV串列加速器离子-原子碰撞实验终端上产生的单核子能量为20—500keV的Cq+和Oq+(q=1—4)离子与He原子碰撞.采用符合测量方法和多参数数据获取系统得到了散射离子与反冲离子电荷态的二维谱,从而分别得到直接电离、入射离子俘获电子和入射离子损失电子截面与总截面的截面比Rdirect,Rcapture和Rloss,并对强扰动能区的各个反应道之间竞争关系及同一反应道在不同碰撞体系中所表现出的实验规律进行了比较和定性分析.We measured the cross-section ratios of helium induced by Cq＋ and Oq＋ （q = 1--4） produced by the 2 ×1.7 MV tandem accelerator of Lanzhou University in the energy range from 20 to 500 keV. We obtained the two-dimensional spectrum by employing coincidence method combined with the MPA-3 data acquisition system. Thus, we obtained the ratios of direct ionization, projectile capture electrons and projectile loss electrons to the total cross-section which are denoted by of Rdirect, Rcapture and Rloss in this paper. A qualitative explanation of the competitive relation of the three reaction-channels and the emperical laws of the three reaction channels are separately presented.

关 键 词：离子-原子碰撞 截面比 竞争关系 强扰动区 

分 类 号：O562.5[理学—原子与分子物理]