Environmental effects on the energy migration coefficient, the effective energy transfer and quenching distances in an organic liquid scintillator

The rate parameter k 3 of solvent-solute energy transfer and the rate parameter k 7b of solvent-quencher energy transfer are determined experimentally under ultraviolet excitation, for a system ethyl-1-butyl-2-methyl-5-ethoxycarboxymethoxyindole-3-carboxylate (EBMEC) in deoxygenated systems comprisi...

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Bibliographic Details
Published in:Chemical physics 1990-12, Vol.148 (2), p.347-357
Main Authors: Hanagodimath, S.M., Chikkur, G.C., Gadaginamath, G.S.
Format: Article
Language:English
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Summary:The rate parameter k 3 of solvent-solute energy transfer and the rate parameter k 7b of solvent-quencher energy transfer are determined experimentally under ultraviolet excitation, for a system ethyl-1-butyl-2-methyl-5-ethoxycarboxymethoxyindole-3-carboxylate (EBMEC) in deoxygenated systems comprising neat toluene (TN), dilute mixture 1:9 by volume fraction of toluene and cyclohexane (TC), and also of toluene and liquid paraffin (TP) as a function of temperature in the range 293–343 K (viscosity range 0.35–39.0 cP) using bromobenzene as a solvent quencher. The results are discussed in terms of the influence of temperature, dilution and viscosity of the medium on the energy migration coefficients and also on the effective energy transfer and quenching distances in binary organic liquid scintillator systems.
ISSN:0301-0104
DOI:10.1016/0301-0104(90)89030-T