Physical Review A - Atomic, Molecular, and Optical Physics
Through an exact solution of the time-dependent SchrÃ¶dinger equation for an electron in a static electric field plus the time-dependent electric field of the detaching radiation, the photodetachment cross section of H - is calculated. Careful attention is paid to ensuring proper limiting behavior as the frequency of the time-dependent field goes to zero. We do not find observable effects of a cross term between the two fields on the detachment cross section. Our results point to possible gauge dependence and other difficulties of S-matrix formulations of multiphoton detachment and ionization.
Rangan, Chitra and Rau, A.R.P.. (2000). Photodetachment in combined static and dynamic electric fields. Physical Review A - Atomic, Molecular, and Optical Physics, 61 (3), 033405-1-033405-4.