Low energy electron capture in collisions of C~(3+)with He

摘要

Charge transfer processes due to collisions of ground state C~(3+)(1 s~22s ~2S) ions with He atom areinvestigated using the quantum-mechanical molecular-orbital close-coupling (QMOCC) method forenergies between 10~(-4)eV/u and 10~3eV/u. Theab initioadiabatic potential radial coupling utilized inthe QMOCC calculations are obtained from the multi-reference single- and double-excitationconfiguration interaction (MRD-C1) approach. Total and state-selective single electron capture (SEC)cross sections and rate coefficients are obtained and compared with the available experimental andtheoretical data. Good agreement between the measured SEC cross sections and the present calculation isfound, but the previous calculation of total rate coefficient using the Landau–Zener model is one or twoorders of magnitude smaller than the present result.