Abstract
New results of many-electron calculations of the outer-shell p-electron photoionization cross sections for rubidium and cesium atoms are presented. The resonance structure of these cross sections, related to the excitation of the autoionization sates ns1np6(n + 1)s1mp (m = n + 1, n + 2, n + 3, …), is analyzed. The many-electron correlations are taken into account within the framework of the random phase approximation with exchange and the many-body perturbation theory. The decisive role of two-electron processes in the formation of resonance profiles is demonstrated. Differences in the behavior of electrons with various spin moment projections are traced.
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