he t@pms for 739 ang yp?39 were derived as in Eqe 3.9. The ratio of U activity to U“39 activity, 0.0007, was determined in this case by a solution of simultaneous equations using actual decay curves because capture to fission ratios were una However, because of its short half-life, ble for this shot. cannot be calculated similarly, The fission activity component wast Ape Aypthe3 (3.15) where the exponent was determined from decay data after 2000 hr. A few decay determinations from early~interval samples of Easy, Fox, and George show that a highpercentage of activity originated prior to Shot 3, probably from Shot le The decay from these samples follows the relationship: A=A,(t 4 998)" (3.16) where 998 hr is the time elapsed between Shots 1 and 3 and n is the Shot 1 decay exponent during this periode The activity values from the first two 30min intervals and the first 5-min interval were extrapolated to sampling time ny Eq. 3216. All other activities were extrapolated using Eq. 3-14 and 3e15¢ Shot 3 decay exponents are listed in Table 3.4. decay curve is shown in Fig. 3.2. 3 03 o4 A typical Shot 4 The activities of Shot 4 samples were corrected to sampling time by the relations Asx Ayt-1 04 (3 el? ) where 1.4 is the average of the Shot 4 decay exponents. The decay curves for this shot are more nearly straight lines on log-log paper than the curves from Shots 1 and 3, indicating that the neutron capture activities in samples from Shot 4 are small or absent; therefore, no corrections were made for these neutron capture activities. Shot 4 decay values are shown in Table 3.4 and a typical curve is illustrated in Fige 3045 3305 Shot Shot 6 activities were corrected to sampling time by the re~ lationships Az Atte? (3.18) The curves show little or no neutron capture activity and no correction was made for neutron capture activities. The value of -1.2 is the average of Shot 6 decays. Values of individual samples are shown in Tables 3.4 and a representative decay curve is illustrated in Fige 34. 44