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K-shell fluorescence yields and their uncertainties for use in hybrid K-edge densitometry...

by Stephen Croft, Andrew D Nicholson, Robert D Mcelroy Jr
Publication Type
Conference Paper
Journal Name
Journal of Radioanalytical and Nuclear Chemistry
Publication Date
Page Numbers
2069 to 2074
Volume
307
Issue
3
Conference Name
Methods and Applications of Radioanalytical Chemistry
Conference Location
Kona, Hawaii, United States of America
Conference Date

Hybrid K-edge densitometry (HKED) is a non-destructive analytical assay technique used to provide rapid determination of actinide concentration in tank solutions. Of special interest for HKED is the estimation, along with associated uncertainties, of the ratio of the flouresence yeilds, ωK, of uranium and plutonium. Limited experimental data for ωK(Z) as a function of atomic number, Z, exist and the data are subject to experimental uncertainty. Previous studies have provided values for ωK(Z) with uncertainty estimates but have not included covariance information. We use a phenomenological model with a bootstrapping method to generate the ratio ωK(94)/ωK(92) and associated uncertainty.