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Polarizabilities and dispersion coefficients of Ca and Sr atoms

✍ Scribed by Valerio Magnasco; Giuseppe Figari

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
400 KB
Volume
111
Category
Article
ISSN
0009-2614

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✦ Synopsis

Ab initio dipole, quadrupole and octopole static polarizabiities for ground state Ca and Sr atoms have been computed in the frozen-core approximation using the variation method and correlated wavefunctions based on Hartree-Fock ho_ One-centre calculation of Ce. Ca. Cro dispersion coefficients is then possible for Caz, Srz and Ca-Sr. While some results are new, excellent agreement is found with other avaihble results of similar accuracy.

31. introduction

Polarization of just the valence shell offers a conveniently simple model for calculating polarizabilities of alkaline earth atoms. In this model core electrons contribute to the average potential field in which valence electrons move but are otherwise assumed unpolarizable. This is reasonable in so far as the polariza-

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