Photoelectron angular distributions beyond the dipole approximation

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This paper reports the measurement of nondipolar asymmetry parameters for the angular distributions of Ar 1s, Kr 2s, and Kr 2p photoemission within 2-3 keV above their respective thresholds. Pronounced asymmetries with respect to direction of photon propagation are present even at low electron kinetic energies. The energy dependence of the asymmetry is Z- and subshell-specific and causes the direction of preferred electron emission to change sign at least once in each case. Towards higher energies, the asymmetry increases and the photoelectron emission pattern is forward-skewed for all 3 cases. Measured asymmetry parameters are in good agreement with recent predictions ... continued below

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12 p.

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Kraessig, B.; Jung, M.; Gemmell, D. S.; Kanter, E. P.; LeBrun, T.; Southworth, S. H. et al. August 1996.

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Description

This paper reports the measurement of nondipolar asymmetry parameters for the angular distributions of Ar 1s, Kr 2s, and Kr 2p photoemission within 2-3 keV above their respective thresholds. Pronounced asymmetries with respect to direction of photon propagation are present even at low electron kinetic energies. The energy dependence of the asymmetry is Z- and subshell-specific and causes the direction of preferred electron emission to change sign at least once in each case. Towards higher energies, the asymmetry increases and the photoelectron emission pattern is forward-skewed for all 3 cases. Measured asymmetry parameters are in good agreement with recent predictions from nonrelativistic calculations which include interference between electric-dipole and electric-quadrupole transition amplitudes in the photoabsorption process.

Physical Description

12 p.

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INIS; OSTI as DE96013468

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  • Workshop on atomic physics with hard x-rays from high brilliance synchrotron light sources, Argonne, IL (United States), 20-21 May 1996

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  • Other: DE96013468
  • Report No.: ANL/PHY/CP--90602
  • Report No.: CONF-9605201--2
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 378186
  • Archival Resource Key: ark:/67531/metadc687158

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • August 1996

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  • July 25, 2015, 2:20 a.m.

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  • Dec. 11, 2015, 3:25 p.m.

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Kraessig, B.; Jung, M.; Gemmell, D. S.; Kanter, E. P.; LeBrun, T.; Southworth, S. H. et al. Photoelectron angular distributions beyond the dipole approximation, article, August 1996; Illinois. (digital.library.unt.edu/ark:/67531/metadc687158/: accessed October 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.