Empirically constructed dynamic electric dipole polarizability function of magnesium and its applications
Abstract
The dynamic electric dipole polarizability function for the magnesium atom is formed by assembling the atomic electric dipole oscillator strength distribution from combinations of theoretical and experimental data for resonance oscillator strengths and for photoionization cross sections of valence and inner shell electrons. Consistency with the oscillator strength (ThomasReicheKuhn) sum rule requires the adopted principal resonance line oscillator strength to be several percent lower than the values given in two critical tabulations, though the value adopted is consistent with a number of theoretical determinations. The static polarizability is evaluated. Comparing the resulting dynamic polarizability as a function of the photon energy with more elaborate calculations reveals the contributions of inner shell electron excitations. The present results are applied to calculate the longrange interactions between two and three magnesium atoms and the interaction between a magnesium atom and a perfectly conducting metallic plate. Extensive comparisons of prior results for the principal resonance line oscillator strength, for the static polarizability, and for the van der Waals coefficient are given in the Appendix.
 Publication:

Physical Review A
 Pub Date:
 August 2015
 DOI:
 10.1103/PhysRevA.92.022712
 arXiv:
 arXiv:1508.01986
 Bibcode:
 2015PhRvA..92b2712B
 Keywords:

 34.20.Cf;
 32.10.Dk;
 31.10.+z;
 Interatomic potentials and forces;
 Electric and magnetic moments polarizability;
 Theory of electronic structure electronic transitions and chemical binding;
 Physics  Atomic Physics
 EPrint:
 17 pages, 3 figures