Abstract
Abstract UV-VIS absorption spectrum of Pr3+ in acetylacetonate chelate dissolved in five solvents, viz. (a) methanol, (b) ethanol, (c) DMF, (d) methanol + ethanol (1:3) and (e) DMF + solvent (d) (1:4) were recorded. From the observed spectral intensities of the bands, the three phenomenological Judd-Ofelt parameters ω2, ω4 and ω6 have been evaluated. Radiative transition probabilities (A), radiative relaxation rates (AT ), radiative lifetimes (TR ) and branching ratios (β R ) for the excited 3P1, 3P0 and 1D2 levels were calculated and their usefulness for laser action is discussed.
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