Phys. Rev. A 67, 043405 (2003) [8 pages]Fragmentation of H2+ in strong 800-nm laser pulses: Initial-vibrational-state dependenceReceived 17 December 2002; published 15 April 2003 The fragmentation of the H2+ molecular ion in 25-fs, 800-nm laser pulses in the intensity range 0.05–0.5 P W/cm2 is investigated by means of wave-packet propagation calculations. We use a collinear reduced-dimensionality model that represents both the nuclear and electronic motion by one degree of freedom including non-Born-Oppenheimer couplings. In order to reproduce accurately the properties of the “real” three-dimensional molecule, we introduce a modified “soft-core” Coulomb potential with a softening function that depends on the internuclear distance. The analysis of the calculated flux of the outgoing wave packets allows us to obtain fragmentation probabilities and kinetic-energy spectra. Our results show that the relative probabilities for dissociation and Coulomb explosion depend critically on the initial vibrational state of the molecular ion. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.67.043405
DOI:
10.1103/PhysRevA.67.043405
PACS:
33.80.Rv, 33.90.+h, 42.50.Hz
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