Ionization of hydrogen atoms by circularly polarized microwaves

Journal Article · Wed Feb 01 04:00:00 EST 1995 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.51.1508· OSTI ID:6578358

Gebarowski, R; Zakrzewski, J ^[1]

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1. Instytut Fizyki Uniwersytetu Jagiellonskiego, ulica Reymonta 4, 30-059 Krakow (Poland) Laboratoire Kastler-Brossel, Universite Pierre et Marie Curie, T12, E1, 4 place Jussieu, 75272 Paris Cedex 05 (France)

Ionization of hydrogen Rydberg atoms by [ital circularly] polarized microwaves is studied numerically within the framework of classical mechanics. Both the simplified two-dimensional model (in which the plane of polarization coincides with the orbit plane) and a fully three-dimensional system are considered. It is shown that the ionization proceeds in the diffusive manner for all microwave frequencies except the low-frequency limit. The threshold for diffusive excitation as well as the diffusion speed is strongly dependent on the initial state of the system for smooth pulse excitation. In a high-frequency limit the ionization threshold rises sharply---the atom is much more resistant to the excitation. Two distinct regimes of stabilization windows (regions where the ionization decreases with increasing field amplitude), one in the strong short-laser-pulse domain and the other in the weak microwave domain, are identified and discussed.

• OSTI ID: 6578358
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 51:2; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
DIFFUSION
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY
ENERGY LEVELS
EXCITED STATES
HYDROGEN
IONIZATION
LASERS
MICROWAVE RADIATION
NONMETALS
PHOTOIONIZATION
POLARIZATION
PULSES
RADIATIONS
RYDBERG STATES
STABILIZATION
THREE-DIMENSIONAL CALCULATIONS
THRESHOLD ENERGY