Electron impact excitation cross sections for allowed transitions in atoms
V. Fisher, V. Bernshtam, H. Golten, Y. Maron
Abstract
We present a semiempirical Gaunt factor for widely used Van Regemorter formula [Astrophys. J. 136, 906 (1962)] for the case of allowed transitions in atoms with the LS coupling scheme. Cross sections calculated using this Gaunt factor agree with measured cross sections to within the experimental error.
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