Ab initio molecular treatment of electron capture processes in the B2+ ++ H collision

The potential energy curves and the coupling matrix elements of the1∑1 and1Π states involved in the collision of the B3+(1s2) multicharged ion on a He target have been calculated by means of an ab initio method with configuration interaction. The total and partial capture cross-sections have been determined, using a semi-classical method. The results are in good agreement with experiment, exhibiting a strong influence of rotational coupling even at low energies.