placed on differences in comparative values of perhaps 25 perégent or less. 3-1-3 Uranium beta Emitters. Table 3.5 lists the heavy-element data for the six shots. This table presents the results obtained by radiochemical analysis of samples collected close-in to the. point of detonation and of samples collected at Hickam Field, Guam, and McClellan (California) for LRD comparisons. The values given are the weighted average Of measurements made in three laboratories and are expressed as atom ratios. The error limits shown are the standard deviations calculated from the average values of the individual determinations. 3-1-4 Plutonium and Uranium Alpha Emitters. Table 3.6 lists the pulse~analysis results obtained by Tracerlab, Inc. on close-in and LRD samples. Unless otherwise noted, fissions are based on Mo%. Mass spec~ trometric measurements made at Argonne National Laboratory, Chicago, Illinois, on close~in and LRD samples are presented in Tables 3.7 and 3.8. Error limits shown are the calculated standard deviations from the aver- age values of the individual determinations. 3.1.5 Induced Activities. Table 3.9 lists the induced-activity data obtained from close-in samples. The close-in values represent the measurements made in two laboratories. The error limits given are the calculated standard deviations from the average values of the individual determinations. The LRD samples for Shots 2, 3, and 6 were not analyzed for induced activities, and only very limited analyses were made in the LRD samples from the other shots. A comparison of these few LRD data with close-in data revealed a moderate spread in the values, but did not suggest any large degree of variability with distance from detonation site. 3.2 RADIOCHEMICAL ANALYSIS OF GAS SAMPLES 3.2.1 Background and Theoretical Data. The gas-sampling program was a continuation of a study to measure selected radioactive induced gases and fission-product gases associated with air-borne nuclear debris from Castle-type shots. Gases selected and measured during Upshot Knothole indicated that the most promising gases-~~both from a diagnostic and detection point of view-~~included C!4 as cl! 0, (produced principally by ny Dp, on nitrogen), A®’ as argon gas (produced by n, yy on stable argon), fission-product gas Kr®5and Xe!33, and tritium present as H50 formed during D + D and D+ T reactions and/or formed by neutron capture by L°. Earlier experimental work during Ivy indicated that most or all tritium associated with nuclear debris was in the liquid physical state, i.e., water. Attempts were also made to measure the extent, if any, of absorbed and/or adsorbed gases in the particles of the debris. Based on Upshot ~ Knothole tests, sampling was performed utilizing Squeegee equipment rather than the Ivy~type snap samplers. The xenon and krypton carrier was added to the high-compression sample cylinders prior to semple collection to aid in determining yields and recovery in the laboratory processing of the samples. In general, to ensure no cross contamination within the sampling 20 fas, 81 thaw 34 Deleted .