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Partial ionisation cross sections for the binary-encounter Bethe model
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DOI：10.1088/1361-6595/adfc09.png)
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Abstract
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The original binary-encounter Bethe model of Kim and Eugene Rudd (1994 Phys. Rev. A 50 3954–67) has proven to be an accurate analytical representation of total impact ionisation cross sections of electrons colliding with atoms and molecules. It is based on a decomposition into partial ionisation cross sections from electrons in bound orbitals. Despite the model’s accuracy for total ionisation, its individual partial cross sections for ionisation rely on thresholds calculated theoretically which systematically overestimate the experimental orbital binding energies. Here, we examine the BEB model’s performance when based on experimental ionisation thresholds. The resulting partial cross sections of the various final (excited) ionic states produced could help to prefigure subsequent optical radiations and non-radiative transitions in models of plasma physics.
Keywords:
Bethe model
impact ionisation
partial cross sections
experimental thresholds
plasma physics
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