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The location of the 5d-energy levels of Ce 3+ and Pr 3+ in the cubic perovskite KMgF 3 and in the distorted perovskite NaMgF 3 was determined from spectroscopic studies in the vacuum ultraviolet. It is established that Ce 3+ and Pr 3+ ions both occupy the same site in each host: K + sites for KMgF 3 and Na + ...
Excitation and emission characteristics of Pr 3+ doped in LaZr 3 F 15 and LaZrF 7 at ~293 and at ~10 K are described. Synchrotron radiation facilities were used. Both zirconium fluorides show quantum splitting after excitation in the 4f5d configuration. The 3 P 0 emission has an internal quantum efficiency close to unity while the 1 ...
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