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

Abstract

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, distinctmore » 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.« less

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Materials and Molecular Research Division, Lawrence Berkeley Laboratory, Berkeley, California 94720 and Department of Chemistry, University of California, Berkeley, California 94720
OSTI Identifier:
5837520
Resource Type:
Journal Article
Journal Name:
Phys. Rev. A; (United States)
Additional Journal Information:
Journal Volume: 28:1
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; XENON; AUGER EFFECT; PHOTOELECTRON SPECTROSCOPY; PHOTOIONIZATION; ANGULAR DISTRIBUTION; ASYMMETRY; BRANCHING RATIO; ENERGY SPECTRA; EV RANGE 10-100; EV RANGE 100-1000; EXCITATION; EXPERIMENTAL DATA; INNER-SHELL IONIZATION; SYNCHROTRON RADIATION; BREMSSTRAHLUNG; DATA; DISTRIBUTION; ELECTROMAGNETIC RADIATION; ELECTRON SPECTROSCOPY; ELEMENTS; ENERGY RANGE; ENERGY-LEVEL TRANSITIONS; EV RANGE; FLUIDS; GASES; INFORMATION; IONIZATION; NONMETALS; NUMERICAL DATA; RADIATIONS; RARE GASES; SPECTRA; SPECTROSCOPY; 640302* - Atomic, Molecular & Chemical Physics- Atomic & Molecular Properties & Theory

Citation Formats

Southworth, S, Becker, U, Truesdale, C M, Kobrin, P H, Lindle, D W, Owaki, S, and Shirley, D A. Electron-spectroscopy study of inner-shell photoexcitation and ionization of Xe. United States: N. p., 1983. Web. doi:10.1103/PhysRevA.28.261.
Southworth, S, Becker, U, Truesdale, C M, Kobrin, P H, Lindle, D W, Owaki, S, & Shirley, D A. Electron-spectroscopy study of inner-shell photoexcitation and ionization of Xe. United States. https://doi.org/10.1103/PhysRevA.28.261
Southworth, S, Becker, U, Truesdale, C M, Kobrin, P H, Lindle, D W, Owaki, S, and Shirley, D A. Fri . "Electron-spectroscopy study of inner-shell photoexcitation and ionization of Xe". United States. https://doi.org/10.1103/PhysRevA.28.261.
@article{osti_5837520,
title = {Electron-spectroscopy study of inner-shell photoexcitation and ionization of Xe},
author = {Southworth, S and Becker, U and Truesdale, C M and Kobrin, P H and Lindle, D W and Owaki, S and Shirley, D A},
abstractNote = {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.},
doi = {10.1103/PhysRevA.28.261},
url = {https://www.osti.gov/biblio/5837520}, journal = {Phys. Rev. A; (United States)},
number = ,
volume = 28:1,
place = {United States},
year = {1983},
month = {7}
}