X2. Energy Transfer and Decay Times in Radiation‐Induced Luminescence of Benzene Solutions

Abstract

AbstractA previously described technique for precise measurement of luminescence decay times in the range around 10−9 sec. has been slightly modified so as to permit more exact interpretation of the data. The results for a system of aerated benzene containing p‐terphenyl scintillator have been analyzed to indicate two decay times τ1 and τ2 as governing parameters of the shape of the luminescence decay curves. The value of τ1 is a variable non‐linear function of scintillator concentration and is assigned to the excited state of the solvent. In absence of scintillator r, for excited benzene is ∼ 2 · 10−8 sec. The value of τ2 is fixed at 2.2 · 10−9sec. and appears assignable to the excited state of the scintillator. However, certain anomalies raise questions as to the propriety of such assignment.