X-ray emission from 424-MeV/u C ions impacting on selected target  

作　　者：周贤明 程锐 雷瑜 孙渊博 王瑜玉 王兴 徐戈 梅策香 张小安 陈熙萌 肖国青 赵永涛 

机构地区：[1]Institute of Modern Physics, Chinese Academy of Sciences [2]School of Physical Science and Technology, Lanzhou University [3]University of Chinese Academy of Sciences [4]School of Science, Xi'an Jiaotong University [5]Normal College of Xianyang

出　　处：《Chinese Physics B》2016年第2期143-147,共5页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China(Grant No.2010CB832902);the National Natural Science Foundation of China(Grant Nos.11505248,11375034,U1532263,11275241,11205225,11105192,and 11275238);the Scientific Research Program of Education Bureau of Shaanxi Province,China(Grant No.15JK1793)

摘　　要：The K-shell x-rays of Ti, V, Fe, Co, Ni, Cu, and Zn induced by 424-MeV/u C^（6＋） ion impact are measured. It is found that the K x-ray shifts to the high energy side and the intensity ratio of Kβ/Kα is larger than the atomic data, owing to the L-shell multiple-ionization. The x-ray production cross sections are deduced from the experimental counts and compared with the binary encounter approximation（BEA）, plane wave approximation（PWBA） and energy-loss Coulomb-repulsion perturbed-stationary-state relativistic（ECPSSR） theoretical predictions. The BEA model with considering the multipleionization fluorescence yield is in better consistence with the experimental results. In addition, the cross section as a function of target atomic K-shell binding energy is presented.The K-shell x-rays of Ti, V, Fe, Co, Ni, Cu, and Zn induced by 424-MeV/u C^（6＋） ion impact are measured. It is found that the K x-ray shifts to the high energy side and the intensity ratio of Kβ/Kα is larger than the atomic data, owing to the L-shell multiple-ionization. The x-ray production cross sections are deduced from the experimental counts and compared with the binary encounter approximation（BEA）, plane wave approximation（PWBA） and energy-loss Coulomb-repulsion perturbed-stationary-state relativistic（ECPSSR） theoretical predictions. The BEA model with considering the multipleionization fluorescence yield is in better consistence with the experimental results. In addition, the cross section as a function of target atomic K-shell binding energy is presented.

关 键 词：high energy heavy ions ion-atom collisions x-ray emission 

分 类 号：O562.5[理学—原子与分子物理]