Electron-impact ionization of laser-excited /sup 138/Ba(. Xchemically bond. 5p/sup 6/6s6p) and /sup 138/Ba(. Xchemically bond. 5p/sup 6/6s5d) atoms

Journal Article · Mon Dec 01 00:00:00 EST 1986 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.34.5154· OSTI ID:6983279

Trajmar, S; Nickel, J C; Antoni, T

Electron-impact ionization cross sections for laser-excited /sup 138/Ba(. . .5p/sup 6/6s6p; /sup 1/P/sub 1/, M = -1) and cascade-populated /sup 138/Ba(. . .5p/sup 6/6s5d; /sup 1/D+ /sup 3/D) atoms were measured in the threshold to 10 eV energy range. The peak cross sections for the excited species are about a factor of 2 larger than that for ground-state Ba. In addition, it was demonstrated that ionization from individual magnetic substates of various hyperfine levels can be studied. The ionization cross sections in the case of /sup 138/Ba (/sup 1/P/sub 1/) were found to be equal for the M = 0 and for the M = +- 1 sublevels within the experimental error limit.

• Research Organization: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109
• OSTI ID: 6983279
• Journal Information: Phys. Rev. A; (United States), Vol. 34:6
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BARIUM
ELECTRON-ATOM COLLISIONS
IONIZATION
CROSS SECTIONS
EXCITED STATES
HYPERFINE STRUCTURE
ALKALINE EARTH METALS
ATOM COLLISIONS
COLLISIONS
ELECTRON COLLISIONS
ELEMENTS
ENERGY LEVELS
METALS
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena