Quantum approach to photoelectron recapture in post-collision interaction.

We have performed a fully quantum-mechanical calculation of the partial ${L}_{2}$-hole ${\mathrm{Ar}}^{+}$ yield from photoionization of Ar at energies just above the ${L}_{2}$ threshold. The result is in excellent agreement with a recent synchrotron-radiation experiment by Eberhardt et al. [Phys. Rev. A 38, 3808 (1988)], illustrating the importance of the Coulomb interaction between the reaction products in influencing the photoionization cross section and Auger rate near threshold.