Radiative electron capture by channeled ions

Considerable experimental data have been accumulated relative to the emission of photons accompanying electron capture by swift, highly stripped atoms penetrating crystalline matter under channeling conditions. Recent data suggest that the photon energies may be less than that expected from simple considerations of transitions from the valence band of the solid to hydrogenic states on the moving ion. The authors have studied theoretically the impact parameter dependence of the radiative electron capture (REC) process, the effect of the ions wake and the effect of capture from inner shells of the solid on the photon emission probability, using a statistical approach. Numerical comparisons of the results with experiment are made