Abstract
L-subshell ionisation cross sections for 4He ion bombardment of Te in the energy range 0.6−5.0 MeV, obtained by means of X-ray production measurements, have been compared with the predictions of different theories (binary encounter approximation, plane-wave Born approximation, semiclassical approximation). The effects of various corrections taking into account binding modifications, polarisation and relativistic motion of the atomic electrons and Coulomb retardation and energy loss of the projectile have been considered. The binding modification turns out to be the most relevant correction, but it is still inadequate to describe the low energy part of the cross sections.
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