rio oram 1G, f me Ne Qe rents oe sy Program 17, Electromaynetic Measurements 2.3 TASK UNIT 2, UCRL PROGRAMS Program 21, Radiochemistry The main objectives of Program 21 were to determine the fission yields and the relative thermonuclear and fission efficiencies in different regions of the UCRL devices. Samples of the particulate debris were collected after each test and analyzed in the ZI. Gaseous samples were collected on selected shots and were analyzed for short-lived products in the FA where necessary; the rest were sent to Livermore for analysis. Airplane sampling was used on all tests; rocket sampling was attempted on several, It was hoped that rockets could be used to supplement and perhaps later obviate the need for manned aircraft. For the present, at least, sampling aircraft seem to be here to stay. : Results are shown in Table 2.2. Program 22, Reaction History Program 22 had the responsibility for Pinex as well as the’ reaction history measurements on all UCRL events. Devices were fired from four differérit locations with measurements as follows: 1. Tare, Bikini. The three events (Nutmeg, Hickory, and Juniper) fired in the Zuni crater were extensively diagnosed. Coverage included measurements of high explosive transit time, high explosive pins, alpha versus time, boost time, boost temperature and yield from Koala, Pinex, and secondary interval time, where applicable. Pinex was the only entirely new technique employed although several new problems arose from the use of barges, e.g., effects of barge motion on collimation and the effect of water shine on neutron measurements. 2. Charlie and Fox, Bikini. Seven events (Fir, Sycamore, Maple, Aspen, Redwood, Cedar, and Poplar) were fired from various north Bikini locations. Several remote diagnostic schemes were developed for these shots: (1) alpha was measured by a photoelectric telescope which picked up light from a fluor wall mounted on the shot barge, (2) high explosive transit time 48 AFWUh. f7