Spectroscopic properties of the gamma irradiated ErF3-DOPED BaF2 crystals

Luminescence Properties and Judd–Ofelt Analysis of Various ErF3 Concentration-Doped BaF2 Crystals

“…The spectroscopic quality factor χ is also given. Significant errors usually occur in the estimation of JO parameters because it is difficult to obtain accurate absorption line strengths in the case of broad and structured absorption bands (as in our case), and due to the JO model itself [ 9 ].…”

“…By excitation at 290 nm, the emission spectra are characterized by five photoluminescence bands: four weak emissions at 403 nm, 471 nm, 523 nm and 539 nm, and a very strong emission at 321 nm ( Figure 6 ). The UV emission reported in our previous work corresponds to the 0.2 mol% ErF 3 sample [ 9 ]. As the ErF 3 concentration increases, the intensity of the emission bands increases (see Figure 5 b and Figure 6 b).…”

“… Influence of the ErF 3 concentration on the Judd–Ofelt parameters, Ω t (10 −20 cm 2 ). The values corresponding to the concentration of 0.2 mol% ErF 3 are designated by open symbols and come from paper [ 9 ]. …”

“…Our preliminary luminescence experiments on a 0.2 mol% ErF 3 :BaF 2 sample showed emission in the near-UV domain [ 9 ]. The Er 3+ :MeF 2 crystals were studied for their properties that are good for cascade excitation [ 10 , 11 , 12 ].…”

“…Bitam et al [ 16 ], using the JO method, reported the calculated and experimental radiative lifetime of Er 3+ states and the quantum efficiency in the case of 2 mol% Er 3+ -doped BaF 2 . The JO intensity parameters Ω i (i = 2, 3, 4) for Er 3+ ions of f-f transitions and comparative analysis of the calculated and measured lifetimes were studied by Stef et al [ 9 ] for BaF 2 : 0.2 mol% ErF 3 and by Preda et al [ 22 ] for Er 3+ :CaF 2 .…”