Convergence of High-Intensity Expansions for Atomic Ionization
- 3 December 1984
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 53 (23) , 2238-2241
- https://doi.org/10.1103/physrevlett.53.2238
Abstract
We show that a frequently used nonperturbative approximation for atomic ionization rates is canceled out when corrections are taken into account. This explains the strong gauge dependence of previous results. A convergent and gauge-invariant expansion is obtained. Numerical results show that its first term, which may be calculated analytically in many cases, describes very well the time-dependent behavior of the ionization probability for very strong fields.Keywords
This publication has 8 references indexed in Scilit:
- High-intensity approximations applied to multiphoton ionizationPhysical Review A, 1981
- Investigation of tunneling processes in laser-induced ionization of argonJournal of Applied Physics, 1981
- Experiments on multiphoton free-free transitionsPhysical Review A, 1979
- Ionization of a model atom by a pulse of coherent radiationJournal of Physics B: Atomic and Molecular Physics, 1977
- Multiphoton Ionization of Rare Gases at Very High Laser Intensity (W/) by a 30-psec Laser Pulse at 1.06 μmPhysical Review Letters, 1976
- Atomic transitions in ultrastrong laser fieldsPhysical Review A, 1974
- Charged-Particle Scattering in the Presence of a Strong Electromagnetic WavePhysical Review A, 1973
- Boundary Conditions and Time-Dependent StatesPhysical Review B, 1951