Cooper minima and Young-type interferences in photoionization of one-electron molecular ions

We study photon- and ion-induced electron emission from one-electron diatomic molecular ions. For photon impact we find an oscillatory behavior of the asymmetry parameter $\ensuremath{\beta}$ and of the total cross section which can be related to the presence of Cooper minima in the partial cross sections. This behavior can also be related to coherent electron emission from the two centers of the molecule. By comparing the results for homonuclear and heteronuclear molecular ions, we show that the periodic structures predicted by both pictures appear clearly only for the former targets. This conclusion is supported by study of the electron emission spectra induced by swift ion impact.