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

Journal Article · Mon May 01 00:00:00 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), Vol. 39:9
• Country of Publication: United States
• Language: English

Related Subjects

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