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Electric-Octupole and Pure-Electric-Quadrupole Effects in Soft-X-Ray Photoemission

Journal Article · · Physical Review Letters
 [1];  [2];  [2];  [3];  [4];  [5];  [6];  [7];  [1];  [2]
  1. Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556 (United States)
  2. Department of Chemistry, University of Nevada, Las Vegas, Nevada 89154-4003 (United States)
  3. Atomic Physics, Stockholm University, 10405 Stockholm, (Sweden)
  4. Department of Physics, Uppsala University, Box 530, S-751 21 Uppsala, (Sweden)
  5. Department of Physics, University of Wisconsin, Eau Claire, Wisconsin 54702 (United States)
  6. Synchrotron Radiation Center, University of Wisconsin, Stoughton, Wisconsin 53589 (United States)
  7. Department of Physics, University of Tennessee, Knoxville, Tennessee 37996 (United States)
+ Show Author Affiliations
Second-order [O(k{sup 2}) , k={omega}/c ] nondipole effects in soft-x-ray photoemission are demonstrated via an experimental and a theoretical study of angular distributions of neon valence photoelectrons in the 100-1200 eV photon-energy range. A newly derived theoretical expression for nondipolar angular distributions characterizes the second-order effects using four new parameters with primary contributions from pure-quadrupole and octupole-dipole interference terms. Independent-particle calculations of these parameters account for a significant portion of the existing discrepancy between experiment and theory for Ne 2p first-order nondipole parameters. (c) 2000 The American Physical Society.
OSTI ID:
20215643
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 10 Vol. 84; ISSN 0031-9007; ISSN PRLTAO
Country of Publication:
United States
Language:
English

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Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
EXPERIMENTAL DATA
NEON
OCTUPOLES
PHOTOELECTRON SPECTROSCOPY
PHOTOEMISSION
PHOTOIONIZATION
QUADRUPOLES
THEORETICAL DATA
X-RAY EMISSION ANALYSIS