Excitation Energy Transfer from Toluene to Some Organic Scintillators

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Abstract
A general equation is derived for the light output of a liquid scintillator as a function of solute concentration, which includes both radiative and nonradiative excitation energy transfer. The rate constants for energy transfer from toluene to 2,5‐diphenyloxazole, anthracene, 9,10‐diphenylanthracene, perylene, and methyl anthranilate, were determined from this equation using oxygen‐quenching data obtained by γ‐ray and uv excitation. The correction of the observed scintillation intensities for reabsorption and re‐emission of solute fluorescence is described. The corrected points were found to agree well with the general equation using transfer rate constants derived from oxygen‐quenching studies.