Oscillations in the autoionization energy distribution of He2+ + H2 double capture collisions

The present study extends previous results in which the autoionization spectra in double capture He2+ + H2 collisions at low impact energies were observed to oscillate in angle. This effect was ascribed to a Young-type interference by the emitted electron acting on the two protons in a way analogous to a double-slit system. Now, a detailed analysis of the autoionizing 2s2 1S state by means of a Fast Fourier Transformation has revealed oscillations in the Auger energy distribution. The possible origin of this periodic structure is discussed, and shown to be essentially different from that previously observed in the angular distribution.