Electron-spectroscopy study of inner-shell photoexcitation and ionization of Xe

Journal Article · Fri Jul 01 00:00:00 EDT 1983 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.28.261· OSTI ID:5837520

Southworth, S; Becker, U; Truesdale, C M; Kobrin, P H; Lindle, D W; Owaki, S; Shirley, D A

Electron spectroscopy, combined with synchrotron radiation in the photon-energy range h..nu..approx. =60--190 eV, was used to measure the angular distributions of Xe 5p and 5s photoelectrons and of N/sub 4,5/OO Auger electrons. The branching ratios and partial cross sections for photoionization and Auger processes were also measured in certain cases. The measured asymmetry parameter ..beta.. for 5p photoelectrons agrees well with many-electron calculations, which predict a pronounced oscillation in ..beta../sub 5p/ above the 4d ionization threshold due to the 4d-5p intershell interaction. The N/sub 4,5/OO Auger electrons are produced with photon-energy-dependent anisotropic angular distributions, resulting from alignment of Xe/sup +/ by photoionization. The theoretical analysis of Auger-electron angular distributions is described, and theoretical calculations are found to predict the measured asymmetries well. In addition, Auger-electron peaks were observed to broaden and shift at photon energies near the 4d ionization threshold because of postcollision interaction. The measured shifts of the N/sub 5/O/sub 1/O/sub 1/ /sup 1/S/sub 0/ line agree with previous measurements and theory. Electron spectra recorded through the energy region of the 4d..-->..np Rydberg states show that they decay primarily by the Auger process, while the 5p and 5s partial cross sections are relatively weakly affected by autoionization. However, distinct resonance structure was observed in the ..beta.. parameters for 5p/sub 3/2/ and 5p/sub 1/2/ photoelectrons. The measured results are compared with a theoretical calculation of resonant photoionization for the 4d..-->..6p excitation.

• Research Organization: Materials and Molecular Research Division, Lawrence Berkeley Laboratory, Berkeley, California 94720 and Department of Chemistry, University of California, Berkeley, California 94720
• OSTI ID: 5837520
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 28:1; 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
ANGULAR DISTRIBUTION
ASYMMETRY
AUGER EFFECT
BRANCHING RATIO
BREMSSTRAHLUNG
DATA
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY RANGE
ENERGY SPECTRA
ENERGY-LEVEL TRANSITIONS
EV RANGE
EV RANGE 10-100
EV RANGE 100-1000
EXCITATION
EXPERIMENTAL DATA
FLUIDS
GASES
INFORMATION
INNER-SHELL IONIZATION
IONIZATION
NONMETALS
NUMERICAL DATA
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
RADIATIONS
RARE GASES
SPECTRA
SPECTROSCOPY
SYNCHROTRON RADIATION
XENON