Relativistic semiclassical approach in strong-field nonlinear photoionization

Details Relativistic semiclassical approach in strong-field nonlinear photoionization Relativistic semiclassical approach in strong-field nonlinear photoionization

1999-12-17

arxiv.org/abs/physics/9912036v1

Physics

Atomic Physics

13 pages, 3 figures, to be published in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.61.033403

Nonlinear relativistic ionization phenomena induced by a strong laser radiation with elliptically polarization are considered. The starting point is the classical relativistic action for a free electron moving in the electromagnetic field created by a strong laser beam. The application of the relativistic action to the classical barrier-suppression ionization is briefly discussed. Further the relativistic version of the Landau-Dykhne formula is employed to consider the semiclassical sub-barrier ionization. Simple analytical expressions have been found for: (i) the rates of the strong-field nonlinear ionization including relativistic initial and final state effects; (ii) the most probable value of the components of the photoelectron final state momentum; (iii) the most probable direction of photoelectron emission and (iv) the distribution of the photoelectron momentum near its maximum value.

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