Action Des Rayons Ionisants Sur Le Benzene Liquide Et Gazeux

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Abstract
The action of alpha particles (5‐8 Mev) on liquid benzene at 30°C and on gaseous benzene at 100°C is followed by a spectrographic method for the reaction in the liquid phase and by manometric measurements for the study of gaseous products formation and of the reaction in the gas phase. In the two cases, within the experimental errors, the effects are proportional to the absorbed energy and are independent on the presence of the products and on the intensity of irradiation. This suggests that the reactions involve hot radicals and occur in the vicinity of the tracks. The yield of disappearance of the molecules in the gaseous reaction (Gdisap. = 4,23) is of the same order of magnitude as the yield found by Henry, Maxwell, White and Peterson for the alpha irradiation of benzene vapor at room temperature. The gaseous yield of the reaction in the liquid phase (Ggas = 0,173) is about three times more important than the yield found by other authors for the beta and gamma irradiation. This seems due to the greater density of ions and excited molecules along the track of the alpha particle.