Hamburg 2009 – scientific programme
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A: Fachverband Atomphysik
A 25: Interaction with Strong or Short Laser Pulses III
A 25.1: Talk
Thursday, March 5, 2009, 10:30–10:45, VMP 8 R208
Strong field dynamics of the hydrogen molecular ion under full Coulomb interaction — •Frank Großmann1, Alexander Kästner1, Anatole Kenfack2, and Jan-Michael Rost3 — 1Institut für Theoretische Physik, TU Dresden, 01062 Dresden — 2Freie Universität Berlin, Institut für Chemie und Biochemie, Takustr. 3, D-14195 Berlin — 3Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Str. 38 . D-01187 Dresden
In strong field physics the use of the so called soft core potential, which smoothes the Coulomb singularity at the nucleus, is a well accepted approximation. It facilitates the numerical solution of the time-dependent Schroedinger equation considerably. Here, we study the dissociation and ionization of the hydrogen molecular ion under the influence of a strong pulsed laser field and in dependence on the initial vibrational excitation. We compare our calculations using the full Coulomb potential with those of Feuerstein and Thumm using a soft core potential [1]. We conclude that the soft-core calculations severely underestimate the dissociation probability and give reasons for this discrepancy.
[1] B. Feuerstein and U. Thumm, Phys. Rev. A 67, 043405 (2003).