H. Wiedemann et J. Mostowski, 2-ELECTRON MOLECULE IN WEAK, STRONG, AND ULTRASTRONG LASER FIELDS - AONE-DIMENSIONAL MODEL, Physical review. A, 49(4), 1994, pp. 2719-2725
We examine the interaction 6f a one-dimensional model molecule with tw
o electrons and two nuclei in a very short pulse of light fields of di
fferent strength. Due to their high masses and the shortness of the pu
lse, the dynamics of the nuclei can be regarded as frozen during the p
ulse and only the electronic part of the wave function has to be taken
into account. After the pulse the molecule will dissociate on a large
r time scale if the electrons are not in a binding state, especially i
f both electrons are removed from the molecule. One finds that the ion
ization and dissociation probability decrease with increasing field st
rength for very high laser intensities, a phenomenon which is already
known for the ionization of atoms. By examination of the shape of the
wave function during the pulse one sees that the electrons are trapped
in bound states of the time-averaged Kramers-Henneberger potential.