An Empirical Formula of Atomic K-Shell Ionization Cross Sections by Electron Impact

• 来源期刊: 中国物理快报（英文版）
• 学科: 物理学
• 年，卷（期）: 2001,（8）
• 页码范围: 1053-1055
• 页数: 3页
• 分类号: O4
• 语种: 英文

摘要

An empirical formula is proposed to describe the K-shell ionization cross sections by electron impact over a wide range of atomic numbers and overvoltages U (the ratio between the electron incident energy and the bindingenergy of the electrons in the K-shell). The study is based on the analysis of existing experimental data of K-shell ionization cross sections. The expression shows the results in good agreement with the data for Z＜6 atoms as well as for 6＜Z＜79.