The effect of benzene on the yield of propane formed by H2 transfer to cyclopropane in γ-irradiated liquid cyclohexane has been used to determine the efficiency of cation scavenging by benzene. The reduction of the hydrogen yield from cyclohexane by the addition of low concentrations of benzene may be accounted for by a combination of cation and H atom scavenging. G(benzene in polymer) found in previous studies correlates well with G(H atoms scavenged).