Final-state effects in the x-ray photoemission spectrum ofEuPd2P2

Valence-band photoemission from the 4f shell confirms the divalent nature of Eu in ${\mathrm{EuPd}}_2$ ${\mathrm{P}}_2$, while photoemission from the 3d deep core level results in both divalent and trivalent spectral features. The ${\mathrm{Eu}}^{3+}$ components, with about 15% intensity in the Eu 3d spectrum, are thus caused by final-state shake-up effects. Their existence is in agreement with the theoretical predictions of Delley and Beck, and they offer strong support for the recent interpretation of the $L_{\mathrm{III}}$-edge spectrum of this compound.