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    • Laser induced long-lived emission spectra of laser dyes in rigid glasses at 77 K

      N N Math A D Mulla M I Savadatti

      Research Articles Volume 36 Issue 4 April 1991 pp 429-434

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      https://www.ias.ac.in/article/fulltext/pram/036/04/0429-0434

    • Keywords

       

      Phosphorescence; delayed fluorescence; triplet-singlet separation; lifetime; triplettriplet annihilation; biphotonic process; contact complex; spin-orbit interaction

    • Abstract

       

      Phosphorescence decay of 3-(2′-N-methylbenzimidazolyl)-7-N, N-diethylaminocoumarin; 2,3,5,6-1H, 4H-tetrahydro-8-methylquinolizino-〈9, 9a, 1-gh〉 coumarin; 2,3,5,6-1H, 4H-tetrahydro-8-trifluormethylquinolizino-〈9,9a,1-gh〉 coumarin; 9(10H)-acridone; 9-aminocridine hydrochloride, 1-hydrate and 2-(4-biphenylyl)-5-(4-t-butylphenyl)-1,3, 4-oxadiazole dyes in EPA glass at 77 K have been recorded using N2 laser. The results were used to determine lifetimes. Emission intensities from the first two dyes have been examined in relation to dye concentration and excitation intensity. The results are discussed.

    • Author Affiliations

       

      N N Math1 A D Mulla1 M I Savadatti1 2

      1. Laser Spectroscopy Laboratory, Department of Physics, Karnatak University, Dharwad - 580 003, India
      2. Mangalore University, Konaje - 574 199, India

    • Dates

       
      Published
      April 1991
      Manuscript received
      7 December 1990

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