3p Coster-Kronig decay of Rb(Z=37) has been studied by comparing the new experimental and theoretical decay widths with earlier predictions and with the results for the neighboring atom Kr(Z=36). The insensitivity of the Coster-Kronig single-channel transition rate around Z=37 to the choice of orbitals and transition energy has been discussed. The reliability of the intermediate-coupling calculations in determining the experimental Coster-Kronig level widths has been called into question.

• Received 15 January 1990

DOI:https://doi.org/10.1103/PhysRevA.42.1791