On the use of the Kramers-Henneberger Hamiltonian in multi-photon ionization calculations
arXiv:physics/0504125 · doi:10.1088/0953-4075/38/13/016
Abstract
We employ the Kramers-Henneberger Hamiltonian for time-independent calculations of multi-photon ionization of atoms with one and two electrons. As compared to the electromagnetic interaction in the length and velocity gauges, the presently employed Kramers-Henneberger gauge has an advantage of the dipole matrix elements for the free-free electron transitions being finite and well-defined quantities. This circumstance simplifies considerably the computations and allows to obtain accurate results for the two-photon ionization of realistic atomic systems.
16 pages, 1 figure