Electron-capture Process Induced by Bare Ion Impact on Biological Targets

• 作者: Abhoy Mondal Chittaranjan Mandal Karunamoy Purkait Malay Purkait Saheb Halder Subhajit Samaddar
• 来源期刊: 能源与动力工程:英文版
• 学科: 物理学
• 关键词: COLLISION CAPTURE cross sections
• 年，卷（期）: 2019,（11）
• 页码范围: 413-426
• 页数: 14页
• 分类号: O57

摘要

Within the framework of independent electron approach,the prior form of boundary corrected continuum intermediate state(BCCIS)approximation is employed to calculate the cross sections for total single electron capture in collision of bare ions(H^+,He^2+ and Li^3+)with biological molecules in the intermediate to high energy regimes.With a suitable choice of the distorting potential,the boundary condition is satisfied with a proper account of the intermediate continuum states.The cross sections have been calculated from 25 keV/amu to 10 MeV/amu.We have approximated the cross sections for molecular targets by the linear combination of atomic cross sections weighted by the effective occupation electron number.Furthermore,the multi-electronic problem is reduced to a mono-electronic one using a version of the independent electron approximation.A detailed analysis on the contributions from different molecular orbitals to total cross sections is reported.In the present investigation,we observe clearly the importance of the core contribution in the change of slope of the TCS curves.Moreover,analysis has been made on the cross section per target electron resulting in achievement of a‘universal'cross section.However,some negligible discrepancies are observed for the case of the CH4 molecule.The present computed results in prior from of BCCIS method have been compared with the available theoretical and experimental results.We found that our computed results are in good agreement with the experimental findings.