Abstract
Samples of lead and praseodymium tungstate solid solution were synthesized from the mixtures of PbWO4 and Pr2(WO4)3 tungstates with praseodymium concentration varied in a wide range. The IR and Raman spectra of polycrystalline Pb1-3x□xPr2xWO4 solid solution were recorded and analysed using the factor group approach, where x was changed from 0.0050 to 0.2222. In the theoretical considerations, the C4h cell symmetry was taken into account. The assignment of the observed bands to the internal and external modes was proposed. Absorption, emission and excitation spectra of the studied solid solutions were measured and analysed. The lifetime of the 3P0 and 1D2 multiplets for x = 0.0050 were measured to be 3.52 and 30.54 μs, respectively. The behaviour of luminescence upon femtosecond excitation was analysed.
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