Research Papers in Physics and Astronomy

 

Date of this Version

April 1990

Comments

Published in Journal of the Optical Society of America B, Vol. 7, Iss. 4 (April 1990), pp. 622-630. Copyright © 1990 Optical Society of America. Used by permission. http://www.opticsinfobase.org/viewmedia.cfm?id=5697&seq=0

Abstract

Methods for applying the variationally stable procedure for N th-order perturbative transition matrix elements of Gao and Starace [Phys. Rev. Lett. 61, 404 (1988); Phys. Rev. A 39, 4550 (1989)] to multiphoton processes involving systems other than atomic H are presented. Three specific cases are discussed: one-electron ions or atoms in which the electron-ion interaction is described by a central potential; two-electron ions or atoms in which the electronic states are described by the adiabatic hyperspherical representation; and closed-shell ions or atoms in which the electronic states are described by the multiconfiguration Hartree-Fock representation. Applications are made to the dynamic polarizability of He and the twophoton ionization cross section of Ar.

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