X-ray absorption spectra of intermediate-valent Ce${\mathrm{Pd}}_3$ compared with those of "trivalent" $\gamma -\mathrm{C}\mathrm{e}$ and Ce${\mathrm{Cu}}_2$${\mathrm{Si}}_2$ taken at high signal-to-noise ratio by using synchrotron radiation reveal the presence of $4f^0$, $4f^1$, and $4f^2$ configurations in the final state. $4f^2$ final-state amplitudes are observed also in $\gamma -\mathrm{C}\mathrm{e}$ and Ce${\mathrm{Cu}}_2$${\mathrm{Si}}_2$ with formally $4f^1$ initial-state configurations.

• Received 18 May 1981

DOI:https://doi.org/10.1103/PhysRevB.24.6139