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Proceedings Paper

A Program To Obtain Reliable Photoabsorption Cross Sections
Author(s): Nancy Kerr Del Grande; K.Glenn Tirsell
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Paper Abstract

A program to obtain reliable photoabsorption cross sections for a broad range of elements has been initiated at Lawrence Livermore National Laboratory. Using well-characterized samples, absolute measurements have been made with overall uncertainties of ±10% or less over energy ranges from about 50 eV to several keV, at several synchrotron radiation facilities. More than a dozen elements have been investigated and other measurements are being planned for elements beryllium (Z=4) through uranium (Z=92). Among the interesting phenomena observed are the resonances/enhancements which seem to accompany virtually every inner shell threshold. Specific examples discussed in this paper include carbon, nickel and uranium. Comparison with theory and existing data compilations/data bases indicate the need for substantial theoretical and compilation improvements.

Paper Details

Date Published: 11 July 1988
PDF: 5 pages
Proc. SPIE 0911, X-Ray and Vacuum Ultraviolet Interaction Data Bases, Calculations, and Measurements, (11 July 1988); doi: 10.1117/12.945468
Show Author Affiliations
Nancy Kerr Del Grande, University of California (United States)
K.Glenn Tirsell, University of California (United States)

Published in SPIE Proceedings Vol. 0911:
X-Ray and Vacuum Ultraviolet Interaction Data Bases, Calculations, and Measurements
Nancy DelGrande; James A. R. Samson; David Y. Smith, Editor(s)

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