Collision-induced three-photon ionization

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A semiclassical treatment of collision-induced three-photon ionization of atoms with a near two-photon resonance is presented. The system is described by an effective two-level system. The wavelength dependence of the ionization yield does not obey a power law. When the first excited state is far from resonance, and with a C6R6 interatomic potential, a first-order correction to the expected -32 power law obeys a-power law. This three-photon process promises to be an extremely sensitive method for the study of collisional effects in the far wing of two-photon S-S and S-D transitions, and without the requirement of high densities.

Original languageEnglish (US)
Pages (from-to)1927-1933
Number of pages7
JournalPhysical Review A
Issue number5
StatePublished - 1979

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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