We present polarized two-photon excitation (TPE) spectra for samarium(III) f 5 in the elpasolite Cs 2 NaYCl 6 . Approximately 80 levels have been assigned up to 29 000 cm −1 with the aid of a one-electron crystal field Hamiltonian, representing the most complete and extensive data set so far reported for Sm(III) at a cubic site. Deviations from the predictions of one-electron theory are discussed in terms of the spin correlated crystal field (SCCF).
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