Abstract
The total and partial photodissociation cross sections of the molecular ion are computed by time-dependent methods for fragmentation into the excited shells up to a photon energy of 40 eV. and states are considered for parallel and perpendicular transitions for different initial rotational or vibrational excitations. Nonadiabatic radial and rotational couplings are taken into account. The results from coupled-channel equations are compared with the Born-Oppenheimer approximation. A time-dependent calculation with a femtosecond laser pulse is carried out to simulate a recent crossed beam photodissociation imaging experiment with vacuum ultraviolet free-electron laser [H. B. Pedersen et al., Phys. Rev. Lett. 98, 223202 (2007)]. The dominance of photodissociation perpendicular to the photon polarization is confirmed.
4 More- Received 12 June 2009
DOI:https://doi.org/10.1103/PhysRevA.80.033417
©2009 American Physical Society