Calculation of Differential Cross Sections for Electron Impact Excitation of $H$ and $He^+$

Authors

  • Zhuo-Jin Lai Department of Physics, College of Science, Shantou University, Guangdong 515063, China
  • De-Feng Chen Department of Physics, College of Science, Shantou University, Guangdong 515063, China
  • Lin-Qing Pan Department of Physics, College of Science, Shantou University, Guangdong 515063, China
  • Xiao-Han Jiang Department of Physics, College of Science, Shantou University, Guangdong 515063, China
  • Yong-Liang Xu Department of Physics, College of Science, Shantou University, Guangdong 515063, China
  • Zhang-Jin Chen Department of Physics, College of Science, Shantou University, Guangdong 515063, China

DOI:

https://doi.org/10.4208/jams.022814.051414a

Keywords:

electron impact excitation, distorted wave Born approximation, differential cross sections, total cross sections.

Abstract

We present the distorted wave Born approximation (DWBA) for electron impact excitation and a method to calibrate the DWBA. With the calibrated DWBA, the differential cross sections (DCS) for excitation of $H$ and $He^+$ from 1s to 2s and 2p are calculated and the results are compared with the absolute experimental measurements for $H$ at incident energies of 50 eV and 100 eV. It has been found that the theoretical results are in very good agreement with the experiment, which confirms the validity of the calibration procedure. This work prepares an efficient theoretical method for numerical simulations of non-sequential double ionization of $He$ in strong laser pulse in which laser-induced electron impact excitation of $He^+$ is involved.

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Published

2021-02-23

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Issue

Vol. 5 No. 4 (2014)

Section

Articles

How to Cite

Calculation of Differential Cross Sections for Electron Impact Excitation of $H$ and $He^+$. (2021). Journal of Atomic and Molecular Sciences, 5(4), 311-323. https://doi.org/10.4208/jams.022814.051414a