Pu 4f XPS spectra analyzed in the Anderson impurity model

X-ray photoemission spectra of the alpha, beta, gamma, and delta phases of Pu have been analyzed using the Gunnarsson-Schonhammer implementation of th e Anderson impurity model. Changes in the relative spectral weights of the two features representing mixed f(5) and f(6) final states are in reasonabl e agreement with the model's predictions. The Coulomb terms, U-ff and Uf(fc ), are quite consistent with those derived from atomic and LDA calculations . Multiplet structure, which agrees with atomic calculations for 4f(13)5f(5 ), strongly suggests 5f localization in the final state. (C) 1999 Elsevier Science B.V. All rights reserved.