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Physical Review B
The emission and excitation spectra of BaF 2 doped with 0.3 and 3.0 mol % Pr 3+ have been studied using synchrotron radiation in the range from 5 to 30 eV. In BaF 2 :Pr 3+ ͑0.3 mol % ͒ the lowest level of the 4f5d configuration of Pr 3+ is located at 5.55 eV relative to the 3 H 4 ,4f ground state. The 1 S 0 ,4f level lies higher, at 5.77 eV. Consequently the crystal shows two types of the Pr 3+ emissions, one related to 5d → 4f transitions with a decay constant of 22 ns, another related to slowdoi:10.1103/physrevb.72.195112 fatcat:wctpjdbhe5getmykuxlwl7dsnm