Exact field ionization rates in the barrier suppression-regime from numerical TDSE calculations

Details Exact field ionization rates in the barrier suppression-regime from numerical TDSE calculations Exact field ionization rates in the barrier suppression-regime from numerical TDSE calculations

1998-02-23

arxiv.org/abs/physics/9802042v3

Physics

Atomic Physics

Enlarged and newly revised version, 22 pages (REVTeX) + 8 figures in ps-format, submitted for publication to Physical Review A

Scientific paper

10.1103/PhysRevA.59.569

Numerically determined ionization rates for the field ionization of atomic hydrogen in strong and short laser pulses are presented. The laser pulse intensity reaches the so-called "barrier suppression ionization" regime where field ionization occurs within a few half laser cycles. Comparison of our numerical results with analytical theories frequently used shows poor agreement. An empirical formula for the "barrier suppression ionization"-rate is presented. This rate reproduces very well the course of the numerically determined ground state populations for laser pulses with different length, shape, amplitude, and frequency. Number(s): 32.80.Rm

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