Inhibition and anti-inhibition effects analyzed using radiation chemistry data

Positronium formation in c-hexane has been studied using C2H5Br, CCl4 or CH3I as an inhibitor, and C6F6 as an anti-inhibitor. The results are analyzed using an empirical formula which is well established in radiation chemistry for electron scavenging reactions in c-hexane. The reactivity parameters derived from the radiation chemistry data are shown to successfully explain the experimental results, demonstrating quantitative agreement between Ps formation and radiation chemistry. A possible positron capture by CCl4, which has been postulated in the present analysis are examined by energy spectra of the Doppler broadened annihilation #betta#-rays. Discussion is made about some further problems. (Auth.)