An Empirical Formula of Atomic K-Shell Ionization Cross Sections by Electron Impact
Tang ChanghuanInstitute of Nuclear Science and Technology, Sichuan University, Key Laboratory for Radiation Physics and Technology of Education Ministry of China, Chengdu 610064An ZhuInstitute of Nuclear Science and Technology, Sichuan University, Key Laboratory for Radiation Physics and Technology of Education Ministry of China, Chengdu 610064Fan Xiao-QiangInstitute of Nuclear Physics and Chemistry, CAEP, Mianyang 621900Luo ZhengmingInstitute of Nuclear Science and Technology, Sichuan University, Key Laboratory for Radiation Physics and Technology of Education Ministry of China, Chengdu 610064
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Аннотация
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 binding energy 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.
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