Absolute determination of the differential elastic cross section and total inelastic cross sections for the collision He+-He between 3 and 50 keV and between 0.25 and 3 degrees. Elaboration of a simple theoretical model

Abstract

The authors studied, by energy loss spectrometry, the direct elastic and inelastic processes and measured their differential cross sections (DCS), with varying energy and scattering angle, for the He+-He collision; the energies range from 3 to 50 keV (laboratory) and the scattering angles are varied from 0.25 to 3 degrees (laboratory). To explain the elastic DCS behaviour, they elaborated a simple theoretical model which gives a good agreement with the experiment, chiefly at high energies. It also allows them to calibrate the experimental results and gives absolute values of the DCS. Further, by integration of the DCS over all scattering angles, they obtained total cross sections (TCS) for the inelastic processes.