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Non-dipole effects in high-energy photoelectron emission; identification and quantification using X-ray standing waves
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UNSPECIFIED (2005) Non-dipole effects in high-energy photoelectron emission; identification and quantification using X-ray standing waves. In: Workshop on Hard X-Ray Photoelectron Spectroscopy, Grenoble, FRANCE, SEP 11-12, 2003. Published in: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 547 (1). pp. 187-195. doi:10.1016/j.nima.2005.05.024 ISSN 0168-9002.
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Official URL: http://dx.doi.org/10.1016/j.nima.2005.05.024
Abstract
The dipole approximation is routinely used in photoelectron emission studies of gas phase and condensed matter, and is generally thought to be adequate up to photon energies of tens of kiloelectron-volts. There is, however, now ample evidence from theory and experiment that this approximation routinely breaks down at much lower energies, in some cases as low as hundreds of electron-volts. The breakdown is most significant in influencing the angular dependence of photoelectron emission and was first identified in gas-phase experiments. A particular consequence is the introduction of a forward backward asymmetry into the angular dependence relative to the direction of photon propagation. This effect also has a proved important in surface structure determination using photoelectron-monitored X-ray standing wavefield absorption, and a variant of this technique has been used to determine the quadrupolar asymmetry parameter values for Is emission from many low atomic number atoms. (c) 2005 Elsevier B.V. All rights reserved.
Item Type: | Conference Item (UNSPECIFIED) | ||||
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Subjects: | Q Science > QC Physics | ||||
Journal or Publication Title: | NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | ||||
Publisher: | ELSEVIER SCIENCE BV | ||||
ISSN: | 0168-9002 | ||||
Official Date: | 21 July 2005 | ||||
Dates: |
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Volume: | 547 | ||||
Number: | 1 | ||||
Number of Pages: | 9 | ||||
Page Range: | pp. 187-195 | ||||
DOI: | 10.1016/j.nima.2005.05.024 | ||||
Publication Status: | Published | ||||
Title of Event: | Workshop on Hard X-Ray Photoelectron Spectroscopy | ||||
Location of Event: | Grenoble, FRANCE | ||||
Date(s) of Event: | SEP 11-12, 2003 |
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