Spontaneous Transition Probabilities and Branching Ratios for the Excited States of Pr³⁺ in Acetylacetonate

Y. Subramanyam Spectroscopic and Chemical Physics Laboratories, Department of Physics, S. V. University, Tirupati, 517 502, India

L. Rama Moorthy Spectroscopic and Chemical Physics Laboratories, Department of Physics, S. V. University, Tirupati, 517 502, India

S. V. J. Lakshman Spectroscopic and Chemical Physics Laboratories, Department of Physics, S. V. University, Tirupati, 517 502, India

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 (A_T ), radiative lifetimes (T_R ) 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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Spontaneous Transition Probabilities and Branching Ratios for the Excited States of Pr³⁺ in Acetylacetonate

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Spontaneous Transition Probabilities and Branching Ratios for the Excited States of Pr3+ in Acetylacetonate

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Spontaneous Transition Probabilities and Branching Ratios for the Excited States of Pr³⁺ in Acetylacetonate