The role ethylene molecule clusters in a gas jet radioactivity transport system

An ethylene gas jet radioactivity transport system has been studied in detail to elucidate the mechanism of the transport process. The role of impurities and formation of polymers were shown to play a minor role. The results obtained indicate that clusters, in the ethylene gas supply cylinder at pressures and temperatures above the critical values for ethylene, are necessary for the successful transport of the radioactive products of fast neutron-induced reactions. Other gases which also were used successfully to transport radioactivity were ethane and CO 2 . A possible mechanism is discussed.