Dissociation and ionization dynamics of H{sub 2}{sup +} with short laser pulses: The L{sup 2} approach
- Centre Lasers Intenses et Applications, UMR 5107 du CNRS-CEA-Universite Bordeaux I, Universite Bordeaux I, 351 Cours de la Liberation, F-33405 Talence Cedex (France)
- Laboratoire de Physique Atomique et Moleculaire, Faculte des Science, Universite Hassan II, Adin Chock Km 8, Route d'el Jadida, BP 5366, Maarif, Casablanca (Morocco)
The dynamics of multiphoton processes in H{sub 2}{sup +} ions interacting with strong femtosecond fields is investigated by solving the time-dependent Schroedinger equation in the Born-Oppenheimer approximation. We use a spectral method with prolate spheroidal coordinates to represent the electronic wave functions. The theoretical approach is of spectral type in which the electronic and vibrational wave functions are represented with L{sup 2} basis functions. In order to check the accuracy of these wave functions we have investigated the cases of the multiphoton ionization and dissociation of H{sub 2}{sup +} at long wavelengths. First, we calculate the ionization probabilities and the electron spectra at 228 nm and 400 nm, and we compare our results with other calculations when available. The effect of the initial dispersion of the internuclear distance R in the equilibrium region is discussed in the context of short pulses. Then, we study the dissociation of H{sub 2}{sup +} at 350 nm and we compare our results with other recent calculations. Finally, the case of two-photon ionization of H{sub 2}{sup +} at short wavelength is investigated, and we examine the electronic and vibrational spectra that have been obtained.
- OSTI ID:
- 20641012
- Journal Information:
- Physical Review. A, Vol. 69, Issue 4; Other Information: DOI: 10.1103/PhysRevA.69.043403; (c) 2004 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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Related Subjects
ACCURACY
BORN-OPPENHEIMER APPROXIMATION
COMPARATIVE EVALUATIONS
COORDINATES
DISSOCIATION
DISTANCE
ELECTRON SPECTRA
EQUILIBRIUM
HYDROGEN IONS 2 PLUS
LASER RADIATION
MULTI-PHOTON PROCESSES
PHOTOIONIZATION
PROBABILITY
PULSES
SCHROEDINGER EQUATION
TIME DEPENDENCE
WAVE FUNCTIONS
WAVELENGTHS