Abstract
High‐resolution X‐ray photoelectron spectra have been acquired from sputter cleaned and in situ oxidized samples of α‐plutonium and a face‐centred cubic δ‐plutonium–gallium alloy. The differences in the Pu4f peak shape in these two materials have been investigated, and the poorly screened satellite peaks have been quantified. Curve fitting parameters for the Pu4p3/2, Pu4d5/2, Pu4f and Pu6p3/2 photoelectron peaks are reported, and relative sensitivity factors have been determined. The Pu4f curve fit model has been applied to data acquired using different spectrometers and alloys. Examples of quantification of the plutonium spectra are provided and minimum detection limits are calculated for common impurities in plutonium metal.
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