Three-photon above-threshold ionization of magnesium
- Department of Chemistry and James Franck Institute, University of Chicago, Chicago, Illinois 60637 (United States)
- Departamento de Quimica C-9, Universidad Autonoma de Madrid, 28049 Madrid (Spain)
- Centre des Lasers Intenses et Applications (UMR 5107 du CNRS), Universite de Bordeaux I, 351 Cours de la Liberation, F-33405 Talence (France)
Three-photon ionization cross sections from the ground state, and two-photon ionization from the 3 {sup 1}P(3s3p) state have been calculated for Mg in the region between the 3p and 4s ionization thresholds. These processes include an above-threshold ionization process for the last absorbed photon. We have used the Green's-function method in the Feshbach formalism and an L{sup 2} close coupling approach, with a basis of L{sup 2} integrable B-spline functions. We report the positions, widths, and assignments of a number of relevant {sup 1}P{sup o} and{sup 1}F{sup o} doubly excited Feshbach states. We also observe unusually high cross sections due to a bound-bound transition from the 3 {sup 1}S(3s{sup 2}) to the 3 {sup 1}P(3s3p) state, a core excitation process, and the population of an intermediate doubly excited state. Both total cross sections and angular distributions are reported.
- OSTI ID:
- 20640496
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 68; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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