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Concerning 5f electron correlation inδ-Pu
1Department of Chemistry and Physics, U. of Wisconsin-Oshkosh, Oshkosh 54901, WI, United States of America.
Abstract:
Detailed measurements of the Pu 4f, O1s and C1s photoelectron spectra, using synchrotron-radiation soft x-rays as the excitation, have been used to investigate the question of the source of the multiplet structure in the Pu 4f spectra of δ-Pu. The conventional wisdom is that the Pu 4f multiplet structure is due to either an Anderson-Impurity-Model mechanism or different types of multi-electronic screening. Here, it is experimentally demonstrated that the multiplet structure in δ-Pu is due to sample impurities, using an extrapolation to zero concentration. This extrapolation is only possible because of the enhanced sensitivity from the synchrotron radiation.
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