Asymmetric two-electron excitations in atomic strontium and barium

1 February 1994

journal article
research article
Published by American Physical Society (APS) in Physical Review A

Vol. 49 (2) , 1029-1040
https://doi.org/10.1103/physreva.49.1029

Abstract

We present a general nonperturbative calculation of the photoionization cross section for highly asymmetrical two-electron systems. The calculations were performed using the eigenchannel R-matrix procedure together with multichannel quantum-defect theory, including the effects of long-range multipole interactions. The isolated-core approximation is extended to treat two-photon absorption. The calculations permit a detailed interpretation of recent experimental measurements in atomic strontium and barium.

Keywords

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