Calculations for electron impact ionization of Be atoms and its charged states, Be+ and Be2+

Abstract

Electron impact triple differential cross section (TDCS) results are reported for the single ionization of Be(2 s), Be(1 s), Be2+(1 s) and Be+(2 s) targets. The differential cross sections have been calculated in the modified distorted-wave formalism under different kinematical conditions for the coplanar emission of electrons. Due to the unavailability of experimental data, we have made a careful comparison of Be and its ions TDCS with the trends of TDCS measured for He and Li targets, which have similar electronic configurations as Be+2 and Be+ respectively. Similarity in the trends of TDCS are observed for He(1 s); Be2+(1 s) targets, Li(2 s); Be+(2 s) and Be(1 s); Be2+(1 s) targets. The effects of iso-electronic and iso-nuclear configurations on collision dynamics are observed in the trends of TDCS.