A Program To Obtain Reliable Photoabsorption Cross Sections

Nancy Kerr Del Grande; K.Glenn Tirsell

doi:10.1117/12.945468

11 July 1988 A Program To Obtain Reliable Photoabsorption Cross Sections

Nancy Kerr Del Grande, K.Glenn Tirsell

Proceedings Volume 0911, X-Ray and Vacuum Ultraviolet Interaction Data Bases, Calculations, and Measurements; (1988) https://doi.org/10.1117/12.945468
Event: 1988 Los Angeles Symposium: O-E/LASE '88, 1988, Los Angeles, CA, United States

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.

Citation Download Citation

Nancy Kerr Del Grande and K.Glenn Tirsell "A Program To Obtain Reliable Photoabsorption Cross Sections", Proc. SPIE 0911, X-Ray and Vacuum Ultraviolet Interaction Data Bases, Calculations, and Measurements, (11 July 1988); https://doi.org/10.1117/12.945468

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