Study of (e, 2e) process on potassium at 6 eV-60 eV above threshold in a second-order Born approximation

• 来源期刊: 中国物理B（英文版）
• 关键词: second-order Born approximation (e,2e) collisions potassium triple differential cross section
• 年，卷（期）: 2012,（8）
• 页码范围: 197-201
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/1674-1056/21/8/083401

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.