Abstract
PrF3 as well as PrF3-LiF and PrF3-MgF2 mixtures were investigated by means of high-energetic excitation with synchrotron radiation. In the PrF3 emission spectrum bands due to the intra-configurational 4f2→4f2 transitions originating from the 1 S 0 level of the Pr3+ ion have been identified. The emission from the 3 P 0 multiplet is very weak due to non-radiative decay by cross-relaxation processes. Therefore, PrF3 is not an efficient direct cascade emitter. In the PrF3 excitation spectra in the ultraviolet/vacuum-ultraviolet spectral range, the 3 H 4→1 S 0 transition at 46858 cm-1 as well as broad bands due to the inter-configurational 4f2→4f5d transitions are observed. By comparison with data of Pr3+ doped YF3, the branching ratios of the emission transitions for PrF3 from the 1 S 0 were determined; these are 0.008, 0.075, 0.262, 0.023 and 0.629 for transitions 1 S 0→3 H 4, 3 F 4, 1 G 4, 1 D 2 and 1 I 6, respectively. For the polycrystalline PrF3-LiF and PrF3-MgF2 samples investigated by us, the measured emission and excitation spectra are nearly identical to those of PrF3. For polycrystalline PrF3-KMgF3 the observed spectra are superpositions of the PrF3 and Pr3+:KMgF3 spectra.
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42.70.-a; 78.55.-m; 78.55.Hx
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Kück , S., Sokólska , I. Room temperature emission from the Pr3+ 1 S 0-level in PrF3 . Appl Phys A 77, 469–474 (2003). https://doi.org/10.1007/s00339-002-1463-z
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DOI: https://doi.org/10.1007/s00339-002-1463-z