Stochastic ionization of hydrogen atoms in a circularly polarized microwave field

Journal Article · Wed Jul 01 04:00:00 EDT 1992 · Physical Review A. General Physics; (United States)

DOI:https://doi.org/10.1103/PhysRevA.46.364· OSTI ID:7105631

Howard, J E ^[1]

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1. Institute of Nonlinear Science, University of California, Santa Cruz, California 95064 (United States)

Ionization of hydrogen atoms by circularly polarized microwave radiation is investigated by means of a classical Hamiltonian model exhibiting chaotic dynamics. An analytic expression is derived for the ionization threshold as a function of the microwave frequency and field strength and is found to agree well with computed Poincare sections in the high-scaled-frequency regime, {ital n}{sub 0}{sup 3}{omega}{gt}1. The results underline the crucial role of core effects in the ionization of nonhydrogenic atoms. For nearly circular orbits forbidden zones of complex eccentricity partition the phase-space torus into disjoint regions.

• OSTI ID: 7105631
• Journal Information: Physical Review A. General Physics; (United States), Journal Name: Physical Review A. General Physics; (United States) Vol. 46:1; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
BEAMS
COLLISIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY
FREQUENCY DEPENDENCE
HYDROGEN
IONIZATION
MICROWAVE RADIATION
NONMETALS
PHOTON COLLISIONS
PHOTON-ATOM COLLISIONS
POLARIZED BEAMS
RADIATIONS
STOCHASTIC PROCESSES
THRESHOLD ENERGY