Microwave ionization of H atoms: Breakdown of classical dynamics for high frequencies
We report the first measurements of microwave excitation and ionization of excited hydrogen atoms for scaled frequencies n/sub 0//sup 3/..omega.. up to 2.8. Classical 3d calculations which directly model this 36.021-GHz experiment agree quite well for n/sub 0//sup 3/..omega..<1, agree less well for 1less than or equal ton/sub 0//sup 3/..omega..less than or equal to2, and do not agree for n/sub 0//sup 3/..omega..>2. This supports theoretical predictions that as n/sub 0//sup 3/..omega.. rises above one quantal ionization threshold fields rise above those for the onset of classical chaos; however, the data continue to reveal local stability near certain rational frequency ratios that recalls classical behavior.
- Research Organization:
- Physics Department, State University of New York, Stony Brook, New York 11794 Mathematics Faculty, Open University, Milton Keynes, MK7 6AA, United Kingdom
- OSTI ID:
- 6723896
- Journal Information:
- Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 61:18; ISSN PRLTA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
DATA
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY LEVELS
EXCITED STATES
EXPERIMENTAL DATA
HYDROGEN
INFORMATION
IONIZATION
MECHANICS
MICROWAVE RADIATION
NONLINEAR OPTICS
NONMETALS
NUMERICAL DATA
OPTICS
QUANTUM MECHANICS
RADIATIONS
TIME DEPENDENCE