Abstract The BBK approach is modified by the introduction of effective Sommerf eld parameters for both symmetric and asymmetric geometries, according to the fact that the strength of any particular two body Coulomb interaction is affected by the presence of the third particle. The triple differential cross sections for electron impact ionization of atomic helium at incident energies of 40 and 50 eV in asymmetric geometry are calculated. Results of this approach are found to be in good agreement with the absolute measurements and the only existing theoretical results of the convergent close-coupling method.
Received: 10 July 1997
Accepted manuscript online:
X-ray emission from 424-MeV/u C ions impacting on selected target Xian-Ming Zhou(周贤明), Rui Cheng(程锐), Yu Lei(雷瑜), Yuan-Bo Sun(孙渊博), Yu-Yu Wang(王瑜玉), Xing Wang(王兴), Ge Xu(徐戈), Ce-Xiang Mei(梅策香), Xiao-An Zhang(张小安), Xi-Meng Chen(陈熙萌), Guo-Qing Xiao(肖国青), Yong-Tao Zhao(赵永涛). Chin. Phys. B, 2016, 25(2): 023402.
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