Absolute Liquid-Scintillation Rate Constants and Fluorescence Efficiencies

A method of measuring absolute numbers of photons from beta-particle-induced fluorescence of liquids was used to obtain absolute rate-constant values for fluorescence and fluorescence quenching in toluene and toluene-base scintillator solutions. The average number of fluorescent-state toluene molecules produced by ¹⁴C beta particles and fluorescence efficiencies based on that number were obtained.