Energy shifts of K± x-ray satellites in low-Z atoms

A study of the energy shift of x-ray K± satellites relative to the K± diagram lines for atoms having 10Z32 is presented. Nonrelativistic Hartree-Fock (HF) total energies are employed, as well as the hydrogenic analytic model of Burch et al. [Phys. Rev. A 9, 1007 (1974)] using both HF-derived and Slater-rule screening constants. The results are compared with an extensive body of experimentally derived ion-, electron-, and photon-excited shifts. The HF results are found to increasingly underestimate the measured shifts for Z17, while the analytic model using HF screening constants overestimates them uniformly by about 2.5 eV for almost all Z. Excellent agreement is found for the very recent self-consistent-field extension of Burchs model by Bhattacharya et al. [Phys. Rev. A 37, 3162 (1988)]. A way of improving agreement between HF calculations and experiment is suggested.