A real time dynamical calculation of H2− photodissociation

A one-dimensional wavepacket study of a two-state system (H2−), coupled by a laser pulse, is presented. The wavepacket time evolution on a repulsive excited potential surface is simulated for a weak laser field as well as for a strong one. The complex lifetime of H2− photodissociation is calculated to be about 8.5 fs. The deformation of the ground state wavepacket under a strong laser field has been discussed and it is found that the strong field did not only induce the electronic state excitation but also resulted in the vibrational excitation of the electronic ground state in H2− photodissociation.