A study of electron capture and excitation processes in collisions of multiply charged ions with lithium atoms

Abstract

The atomic-orbital close-coupling method (AO-CC) has been employed in calculations of electron capture and target excitation in collisions of fully stripped ions Aq+ (q=2-6) with Li(ns,p) atoms (n=2,3) at low and intermediate energies. Total and state selective single electron capture (SEC) cross sections have been determined. Data for SEC into nl sub-levels of the projectile have been used to calculate the related line emission cross sections, which are compared with available experimental and theoretical data. In addition cross sections for various target excitation processes, in particular the Li(2s-2p) resonance transition are presented. The scaling properties of the total SEC and target excitation cross sections are investigated, and their implication for lithium beam edge plasma spectroscopy is being discussed. For completion, scaling relations for ionization are also given.