Conducted on May 25 , 1951 , '' Item '' was the first test of an actual boosted fission weapon , nearly doubling the normal yield of a similar non-boosted weapon . In this test , deuterium-tritium ( D-T ) gas was injected into the enriched uranium core of a nuclear fission bomb . The extreme heat of the fissioning bomb produced thermonuclear fusion reactions within the D-T gas . While not enough to be considered a full nuclear fusion bomb , the large number of high-energy neutrons released nearly doubled the efficiency of the nuclear fission reaction
Item
Greenhouse Item
Operation Greenhouse