Correlation effects in two-photon single and double ionization of helium

Journal Article · Tue Jul 01 04:00:00 EDT 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.68.013409· OSTI ID:20639935

Laulan, S; Bachau, H ^[1]

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1. Centre Lasers Intenses et Applications, UMR 5107 du CNRS, Universite de Bordeaux I, 351 Cours de la Liberation, F-33405 Talence, (France)

We study the effects of two-photon absorption in the region of the double continuum of helium, with extreme ultraviolet (xuv) laser fields. The nonrelativistic time-dependent Schroedinger equation is solved for the two active electron systems, interacting with strong laser pulses. The dynamic calculations include electronic correlations. The final double continuum states are calculated by treating the electronic term 1/r{sub 12} within the zero- and first-order perturbation theory. We calculate the total single and double ionization probabilities and cross sections for photon energies of 45 and 57 eV, as well as the electron energy distributions in the double continuum. The effects of electronic correlations are discussed in the context of ultrashort pulses.

• OSTI ID: 20639935
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 68; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION
ATOMS
CORRELATIONS
CROSS SECTIONS
ELECTRONS
ENERGY SPECTRA
EV RANGE
EXTREME ULTRAVIOLET RADIATION
HELIUM
LASER RADIATION
MULTI-PHOTON PROCESSES
PERTURBATION THEORY
PHOTOIONIZATION
PHOTON-ATOM COLLISIONS
PHOTONS
PROBABILITY
PULSES
SCHROEDINGER EQUATION
TIME DEPENDENCE