Time-dependent treatment of HD^+ in an intense laser field

Brett Esry, Vladimir Roudnev
(James R. Macdonald Laboratory, KSU)

The HD^+ molecular ion in the field of a strong, linearly polarized, short, infrared laser pulse is considered in the framework of the time-dependent Schrödinger equation. We consider a reduced dimensionality approximation to the system by assuming the nuclei are aligned with the field and cannot rotate. Thus, we include one nuclear and two electronic egrees of freedom. Beyond this reduction, our only approximations are due to the discretization of the problem. In particular, we use the full Coulomb potential, not the soft core often used in reduced dimensionality models. The calculations are performed for 10~fs Gaussian laser pulses with intensities in the range 10^14 to 10^15 W/cm^2. The dependence of the D/H dissociation branching ratio on the peak intensity is calculated along with the ionization probability.

This work was supported by the Chemical Sciences, Geosciences and Biosciences Division,
Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy.

Submitted to DAMOP, May 2004 in Tucson, AZ.

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