Electron capture processes in Li2++H collisions

摘要：

　　The electron capture processes in Li2+ + H collisions have been investigated by using the quantum-mechanical molecular-orbital close-coupling method and the two-center atomic-orbital close-coupling method in the energy ranges of 10-8-10 keV/u and 0.1-300 keV/u, respectively.The capture to singlet and triplet systems of states of Li+(1s, nl2S+1L) is considered separately.Total, n, S-resolved and n, l, S-resolved electron capture cross sections are calculated and compared with the results of available experimental and theoretical studies.The present calculations show that the n =2 shell of Li+ is the main capture channel for all energies considered in both the singlet and triplet case.While for collision energies E > 5 keV/u, the cross sections for capture to the n =2 manifold are of the same order of magnitude for both the singlet and triplet states (with the 2p capture cross section being dominant), for energies below ~5 keV/u the cross sections for capture to the n =2 triplet manifold is significantly (more than three orders of magnitude at 0.1 keV/u) larger than that for capture to the n =2 singlet manifold of states (with the 2s capture cross section being dominant).The capture dynamics at low collision energies is discussed in considerable detail, revealing the important role of rotational couplings in population of l > 0 capture states.The elastic scattering processes have been studied as well in the energy range of 10-8-1 keV/u.The calculated elastic scattering cross section is much larger than the electron capture cross section in both the singlet and triplet case.However, as the collision energy increases, the difference between the elastic and electron capture cross sections decreases rapidly.

作者: Ling Ling Yan Ling Liu Jian Guo Wang Ratko K.Janev Robert J.Buenker

作者单位: Department of Radiation Oncology,Cancer Institute (Hospital),Chinese Academy of Medical Sciences,Bei Data Center for High Energy Density Physics,Institute of Applied Physics and Computational Mathemati Macedonian Academy of Sciences and Arts,P.O.Box 428,1000 Skopje,Macedonia;Institut für Energieforsch Fachbereich C-Mathematik und Naturwissenschaften,Bergische Universit(a)t Wuppertal,42097 Wuppertal,G

会议类型: 国内会议

会议名称: 2015年北京放射肿瘤年会

会议地点: 北京

会议语种:英文

页码: 561-573

在线出版日期: 2016-01-09（万方平台首次上网日期，不代表论文的发表时间）