spectra from samples collected at different places and different shots with time, A comparative analysis for only one fallout sample from each shot is presented here. 5el3el Shot A sample of fallout from Rongelap was analysed on + 29 and + 31 days after detonation, The results are shown in Table 5.6. Most of the same peaks show up for both curves with the exception of 0.03 and 0.27 Mev which do not appear at 31 days. Also the relative height of the 0.22 Mev curve is somewhat lower at 31 days. The 31 day curve shows a greater similarity to the other shots than the 29 day curve. In view of the fact that the calibration of the analyser was not completed at the time the first analysis was made the data collected on + 31 days are probably the more significant of the two analyses. TABLE 5.6 - Gamma ergy Measurements from Rongelap Sample, Shot 1 Tine after Shot (days) [0.03 29 0.57 0.07 0.10 Energy(Yev) 0.15 0.22 0.27 0.32 0.50 10.62 Observed Peak Height Relative to 0.10 Mev Peak 31 5elede2 -~ 0.80 1,0 0.86 0.59 0.57 1,0 0.57 0.12 0.35 - ”- 0.17 0.18 |0.05 0.12 0.15 0.05 Shot 2 On + 2 days there are significant peaks at 0.03, 0.08, 0.23, 0.30, 0.38, 0.62. On + 3 days, the 0.30 haa dropped way down, the 0.23 is about the same, the 0.08 is considerably higher and a very high peak has shown up at 0.12 Mev along with a smiler 0.15 peak. The higher energies, 0.38 and 0,62 have decreased considerably. On + 4 days the high peak is still 0.12 Mev, the 0.08 and 0.15 are somewhat lower, and the 0.23 is about the same. There is a 0.28 peak slightly lower than the 0.23. The higher energies are still very low. On + 6 days the 0.03 peak is the same as it was in all pre- vious plots. There is very little change from R + 4 days. On + 6.25 days. Very similar to R + 6 days. The 0.06 and 0.15 peaka are now symmetrical bulges on either side of the high 0.12 peak. appear. ; On + 9 days. Same ac R + 6 except the 0.03 peak does not On + 11 days. Similar to R + 9 days except 0.03 peak again appears, ‘There is a low but definite peak at around 0.50 which has bees present since + 4 days,