Application of the binary-encounter theory to proton impact double ionisation of atoms
- 21 October 1977
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 10 (15) , 3047-3055
- https://doi.org/10.1088/0022-3700/10/15/015
Abstract
Proton impact double ionisation of He has been investigated in the double-encounter model of Gryzinski (1965). The binary-encounter expressions developed by Vriens along with an accurate quantum-mechanical velocity distribution for the bound electrons in both encounters have been used to obtain double-ionisation cross sections. These results have been compared with the experimental observations and earlier calculations by Gryzinski's method. The variation of sigma +/ sigma ++ (single-ionisation cross section/double-ionisation cross section) with incident proton energy is also found to be in qualitative agreement with the experimentally observed variation.Keywords
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