Quenching of the Scintillation from a γ-Irradiated Cyclohexane Solution Containing p-Terphenyl by Electron Scavengers, Positive Ion Interceptors and Some Hydrocarbons

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Abstract
The luminescence from a cyclohexane solution containing p-terphenyl irradiated with 60Co γ-rays has been quenched by various compounds. The quenching efficiencies were found to be in the following order; sulfur hexafluoride∼carbon tetrachloride>nitrous oxide>ethanol>ammonia>carbon dioxide. These compounds are known in radiation chemistry as electron scavengers or as positive-ion interceptors. Cyclopropane and ethylene have also shown an appreciable quenching ability, but n-butane has shown scarecely any. These results have been explained by assuming that ionic reactions are responsible for the luminescence from a cyclohexane-p-terphenyl scintillator.

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