Charge transfer of O++ in helium at thermal energies

Abstract
Detailed calculations are described of the cross sections and rate coefficients at thermal energies for the charge transfer of O2+ (3P) ions in helium and upper limits are obtained to the rate coefficients of the metastable O2+ (1D) and O2+(1S) ions. At 1000 K, the rate coefficient for the ground state ion is 3.1×1011 cm3 s1 and for the metastable ions less than 1015cm3 s1. Charge transfer of O2+(3P) in helium occurs preferentially into the metastable O+1(2P) ion.