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Nuclear kinetic energy spectra of D2+ in an intense laser field: Beyond the Born-Oppenheimer approximation

Mohsen Vafaee

Phys. Rev. A: At. Mol. Opt. Phys., vol: 78, num: 2, 5 pages, published: 19 August 2008, 023410

Abstract: Simultaneously, the vibrational nuclear dynamics and full dimensional electronic dynamics of a deuterium molecular ion exposed to a linear polarized intense laser field are studied. The time-dependent Schrödinger equation of an aligned D2+ ion with electric laser field is solved for a simulation of complicated dissociative ionization processes and compared with recent related experimental results. We introduce and calculate the R-dependent ionization rate and the enhanced ionization phenomenon beyond the Born-Oppenheimer approximation. The substructure of the nuclear kinetic energy release spectra is revealed as the Coulomb explosion energy spectra and dissociation energy spectra in the dissociation-ionization channel. The significance and trace of these distinct subspectra in the total spectra are comparatively displayed and discussed.

   Atoms and molecules.
      Interaction of atoms and molecules with external fields and radiation.
         Transitions between electronic states.
            Lifetimes and transition probabilities for molecules.

   Atoms and molecules.
      Interaction of atoms and molecules with external fields and radiation.
         Transitions by laser radiation.
            Dynamic of processes.