DISCRETIZATION TECHNIQUES APPLIED TO THE STUDY OF MULTIPHOTON EXCITATION OF RESONANCES IN HELIUM

Authors
CORMIER E BACHAU H ZHANG J
Citation
E. Cormier et al., DISCRETIZATION TECHNIQUES APPLIED TO THE STUDY OF MULTIPHOTON EXCITATION OF RESONANCES IN HELIUM, Journal of physics. B, Atomic molecular and optical physics, 26(23), 1993, pp. 4449-4463
Citations number
29
Categorie Soggetti
Physics, Atomic, Molecular & Chemical",Optics
Journal title
Journal of physics. B, Atomic molecular and optical physics → ACNP
ISSN journal
09534075
Volume
26
Issue
23
Year of publication
1993
Pages
4449 - 4463
Database
ISI
SICI code
0953-4075(1993)26:23<4449:DTATTS>2.0.ZU;2-C
Abstract
Two-photon ionization of helium is investigated by using a discretizat ion technique. Perturbative cross sections are calculated with a L2 ba sis set (B-splines), the efficiency of such an approach is discussed i n the context of above threshold ionization (ATI). We propose a parame trization of the cross sections in the region of resonances. The role of the correlations is discussed in a P - Q Feshbach projection treatm ent.