Hartree-Fock calculation of transition rates for atoms with multiple open shells of the same symmetry and the same occupation number
- 1 November 1985
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 32 (5) , 2747-2750
- https://doi.org/10.1103/physreva.32.2747
Abstract
X-ray and Auger transition rates and fluorescence yields have been calculated for the [2p,3p] vacancy states of Ar. The standard Hartree-Fock procedure leads to radial 2p wave functions with a node in the tail region. The calculated transition rates agree well with experiment. A calculation in which special techniques are employed to obtain nodeless 2p wave functions leads to rather poor estimates of the lifetimes, similar to results of earlier Hartree-Fock-Slater calculations. The frozen-core approximation, widely used to calculate Auger rates, yields erroneous results. Reasons for these difficulties are discussed.Keywords
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