Two-photon ionization of alkali-metal atoms in the framework of infinite summations and spin-orbit coupling
- 1 April 1981
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 23 (4), 1823-1840
- https://doi.org/10.1103/physreva.23.1823
Abstract
A theoretical method previously developed for the two-photon ionization of alkali-metal atoms is extended to the spin-orbit coupling scheme. We have obtained the Green's function of this problem in the framework of quantum-defect theory and so we have been able to perform the infinite summations related to perturbation theory. The generalized transition probability rates are calculated in the off-resonant and resonant regions, respectively, for polarized incident radiation. Destructive interference effects between the unperturbed atomic states in the infinite summations producing a finite deep minimum in the off-resonant region, are predicted by our theory, both for linearly and circularly polarized incident radiation. A detailed calculation of electron-spin polarization is given. Comparisons of values predicted by the present work with experiment and other theoretical calculations are made for the case of atomic cesium initially in the ground state.
Keywords
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