32 om MQHAWE) Project 21.3 = Short Half-life Activities - F. Momyer Ancther phase of Project 21.3 was engaged in finding total tritius in the cloud. This wasdone in the following manner: Cerrier emounta of heavy water, krypton and xenon were added to the collection bottles prior to the progres. The collection system consisted of filters for particulate matter and collection bottles mounted on the sacpling planes. es samples vere ocllected at various altitudes and times following the detonation and returned to Parry for separation. Erypton, xenon, water and carbon dioxide vere separated from the gas sample end eclytdenum wee separated from the filter senple. Krypton, zencn and molybdemm vere collected to determine fissions per collection bettle, The remaining activities, c4 and 8 were returned to the laboratory, as bariua carbonate and water for the determination of total tritium and possibly OM yield. CO EEEDOR The fission bottle date are shown in Table 21.31. - Ge tae’? CARTS RO