Dielectronic recombination and resonant transfer excitation for Ca19+ ions

In the frame of quantum defect theory, the dielectronic recombination cross sections of Ca19+ ion are calculated by a simple relativistic configuration interaction method. Based on this calculation, the resonant transfer and excitation cross sections of Ca19+ with H2 and He targets are estimated in impulse approximation. The theoretical results for Ca19+ + H2 system are compared with the measurements available. The effect of target electron momentum distribution on the resonant transfer and excitation cross sections is discussed. (orig.)