On the use of the Kramers-Henneberger Hamiltonian in multi-photon ionization calculations

Details On the use of the Kramers-Henneberger Hamiltonian in multi-photon ionization calculations On the use of the Kramers-Henneberger Hamiltonian in multi-photon ionization calculations

2005-04-19

arxiv.org/abs/physics/0504125v1

Physics

Atomic Physics

16 pages, 1 figure

Scientific paper

10.1088/0953-4075/38/13/016

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.

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