Cycloalkanes were irradiated in the solid phase at 77 K. Post‐irradiation scavenging of radicals by dissolving the irradiated cycloalkane at low temperature (100 ‐ 165 K) in a propane‐oxygen mixture lowers the dicycloalkyl and cycloalkene G values to an extent of 35‐55%. From the Δ G decrease values, we propose that the trapped radical G values be 3.1, 2.7 and 2.7 at 77 K for cyclopentyl, cyclohexyl and cycloheptyl radicals, respectively.