Time-dependent theoretical description of molecular autoionization produced by femtosecond xuv laser pulses
- Departamento de Quimica, C-9, Universidad Autonoma de Madrid, 28049 Madrid (Spain)
- Centre des Lasers Intenses et Applications, UMR 5107 du CNRS-CEA-Universite de Bordeaux I, 351 Cours de la Liberation, F-33405 Talence (France)
We present a nonperturbative time-dependent theoretical method to study H{sub 2} ionization with femtosecond laser pulses when the photon energy is large enough to populate the Q{sub 1} (25-28 eV) and Q{sub 2} (30-37 eV) doubly excited autoionizing states. We have investigated the role of these states in dissociative ionization of H{sub 2} and analyzed, in the time domain, the onset of the resonant peaks appearing in the proton kinetic energy distribution. Their dependence on photon frequency and pulse duration is also analyzed. The results are compared with available experimental data and with previous theoretical results obtained within a stationary perturbative approach. The method allows us as well to obtain dissociation yields corresponding to the decay of doubly excited states into two H atoms. The calculated H(n=2) yields are in good agreement with the experimental ones.
- OSTI ID:
- 20786947
- Journal Information:
- Physical Review. A, Vol. 73, Issue 3; Other Information: DOI: 10.1103/PhysRevA.73.033410; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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