Autoionization of Ba 6p/sub 1/2/nk states in static and microwave fields below the Inglis-Teller limit

Journal Article · Mon May 01 04:00:00 EDT 1989 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.39.4583· OSTI ID:6068221

Jones, R R; Gallagher, T F

Measurements of the autoionization rates of 6p/sub 1/2/nk states of Ba in the presence of static and 9-GHz microwave fields have been performed using a multistep laser excitation technique. For field amplitudes below 1/3n/sup 5/, which defines the Inglis-Teller limit, the measured rates in both static and dynamic fields are in good agreement with a simple Stark-effect model. The rates show an n/sup -4/ scaling rather than the familiar n/sup -3/ dependence observed in zero field. We also report the first observation of forced autoionization by microwaves. Connections between our measurements and the physical situation in plasmas are discussed, including implications for dielectronic recombination.

• Research Organization: Department of Physics, University of Virginia, Charlottesville, Virginia 22901
• OSTI ID: 6068221
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 39:9; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ALKALINE EARTH METALS
ATOM COLLISIONS
AUTOIONIZATION
BARIUM
COLLISIONS
ELECTRIC FIELDS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY-LEVEL TRANSITIONS
EXCITATION
IONIZATION
LASER RADIATION
METALS
MICROWAVE RADIATION
PHOTON COLLISIONS
PHOTON-ATOM COLLISIONS
QUANTUM NUMBERS
RADIATIONS