Abstract
Positronium formation in cyclohexane has been studied using C 2H 5Br or CCl 4 as an inhibitor and C 6F 6 as an anti-inhibitor. The results are analyzed using an empirical formula which is well established in radiation chemistry for electron scavenging reactions in cyclohexane. The reactivity parameters derived from the radiation chemistry are shown to successfully reproduce the experimental results. Very close correlation between positronium formation and radiation chemistry is evident, and the spur reaction model of positronium formation is corroborated. From a simple model of the positron spur in which only a single ion pair and a positron is assumed, it is estimated that about 75% of the spur electron combines with the positron.
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