Ionization of a Particle with a Short-Range Potential Well
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KeywordsNeutral Atom Electron Energy Spectrum External Electromagnetic Field Adiabaticity Parameter Nonlinear Ionization
Nonlinear ionization of a particle with a short-range potential well has been investigated theoretically for a long time. Unlike the case of a long-range potential, we can usually neglect a short-range potential in the wave function of a final continuum state and need only to take into account the external radiation field. This simplifies the theoretical description of the ionization process. As early as the mid-1960s, many subsequently well-known works were published on this subject. Besides the work of Keldysh [3.1] which we mentioned in previous chapters and is also discussed in detail below, we would like to call attention to references [3.2–4]; they are discussed in Delone and Krainov [3.5]. Of special interest is the work by Manakov and Rapoport [3.4] where the exact integral equation for the complex energy of an electron in a zero-range potential perturbed by a circularly polarized monochromatic field was derived and solved numerically. This equation was later considered in further detail by Manakov et al. [3.6].
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