| Study of （e, 2e） process on potassium at 6 eV-60 eV above threshold in a second-order Born approximation |
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| 作者姓名： | 王旸 周雅君 焦利光 |
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| 作者单位： | Center for Theoretical Atomic and Molecular Physics, Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150080, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （Grant No. 11174066）. |
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| 摘 要： | The standard distorted wave Born approximation(DWBA) method has been extended to second-order Born amplitude in order to describe the multiple interactions between the projectile and the atomic target.Second-order DWBA calculations have been preformed to investigate the triple differential cross sections(TDCS) of coplanar doubly symmetric(e,2e) collisions for the alkali target potassium at excess energies of 6 eV-60 eV.Compared with the previous first-order DWBA calculations,the present theoretical model improves the degree of agreement with experiments,especially for the backward scattering angle region of TDCS.This indicates that the present second-order Born term is capable of giving a reasonable correction to the DWBA model in studying coplanar symmetric(e,2e) problems in low and intermediate energy ranges.
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| 关 键 词： | second-order Born approximation (e 2e) collisions potassium triple differential cross section |
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