The radiolysis of liquid ethane at 195°K gives as major products H2, C2H4, andn-C4H10. Minor products are CH4and C3H8. The initial yields of H2and C2H4can only be determined indirectly due to the high rate of H-atom addition to product ethylene.c-C5H8in low concentration effectively scavenges H atoms and hence protects C2H4. The derived initial yields are:G(H2) = 5.97,G(C2H4) = 2.96,G(CH4) = 0.44, andG(C3H8) = 0.55. The yields of scavengeable H atoms and C2H5radicals are 2.29 and 5.81, respectively. The problem of direct measurement of initialG(H2) values for saturated hydrocarbons at low temperatures is discussed.