• Analysis of the fluorescence bands of the uranyl salts

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      https://www.ias.ac.in/article/fulltext/seca/022/02/0110-0121

    • Keywords

       

      Uranyl; Fluorescence Band; Uranyl Nitrate; Uranium Oxide; Croup

    • Abstract

       

      From some direct experimental evidence, it is concluded that the entire fluorescence spectrum of the uranyl salts arises out of a transition from a single excited state (designated1Πg) to the several vibrational states of two close ground levels (designated1Σg and X) and that the1Πg1Σg transition is much less favoured than the1Πg-X transition. Theν1 andν2 frequencies taking part in the transition agree with those observed in the Raman and infra-red spectra;ν1 is, however, very much more prominent. The vibrational structure of the1Πg-1Σg transition resembles that of a forbidden transition, while the structure of the other is that of an allowed one. The intensity distribution of the A, B and C bands is explained. No specific explanation of the D bands is given. Van Heel’s analysis is shown to be unsatisfactory.

    • Author Affiliations

       

      D D Pant1

      1. Department of Physics, Indian Institute of Science, Bangalore
    • Dates

       
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