2.8 Surface arrival-time data scaled to 1 kt at sea level- --------------- 34 for Shot 3 -----.-------+---+--.--------- ee ee 2.10 Pressure-time records, Shot 5----------+-----+-+--+----------+ 34 36 39 42 43 45 45 2.9 Earth-acceleration arrival times versus ground range 2.11 Averaged pressure-distance data --------------------------- Initial gamma exposure versus distance - - --~----------------~---Initial gamma-exposure rates, Shot 4 ----~-------------------Neutron-detector data, Shot 1-------------------- wae eee ene Neutron fission-detector data, Shot 2---------------+-----+------+Reconstructed complete fallout pattern, Shot 1, (r/hr at H+ 1 hour) ----------------+--+------------3.6 Residual gammarate versus time, Shot 1------------------+-+-3.7 Close-in gamma fallout pattern, Shot 3, (r/hr at H + 1 hour) -~------+-3.8 Close-in gammafallout pattern, Shot 4, (r/hr at H + 1 hour)---------- 3.1 3.2 3.3 3.4 3.5 3.9 Exposure-rate contours, Shot 5, (r/hr at H + 1 hour) -----~---~-----3.10 Exposure-rate contours, Shot 6, (r/hr at H + 1 hour) -------------3.11 Cumulative particle-size distribution ~ - ----------------------3.12 Gross beta decay of fallout samples from Shots 1, 2, 3, and 4 ------~--3.13 Gross gamma decay of fallout samples from Shots 1, 2, 3, and 4-----3.14 Gammaionization decay as a function of relative ionization rate, Shot 4 -----------------+-- +2 - ee ee eee eee 3.15 Calculated beta decay ------ “nee ene ee ee ee ee 4.1 Test cubicle, Project 3.1------------- -----+---------------4.2 Tare Island facilities after Shot 1 ----------------+------------4.3 Close-in instrument shelters after Shot 1 -------------- ee ee eae 4.4 Aerial view of crater formed by Shot1] ~------------------------ 46 47 49 49 50 dl 52 o4 55 56 57 59 62 63 64 4.5 Sample Pisonia Plot D, Uncle Island, looking toward ground zero ~----------------------+---------------4.6 Sample Palm Plot B, Uncle Island---------------------------- 6.1 The YAG-39 with the washdown system operating ----------------- 6.2 Ship's course, Shot 5 ----------+-------------------------- 6.3 Apparent absorption coefficient 1 as a function of time -------------- 6.4 Radiation contours from original beta survey on the YAG-40 after Shot 5, 8 May 1954 ------------------------------ 6.5 Radiation contours from original gamma survey on the YAG~40 after Shot 5, 8 May 1954 ------------ enn ee nnn 6.6 Evaluation of experimental decontamination procedures, YAG-40, Shot 2 - ------ = == 2 on ee ee ne 6.7 Percent of original contaminant remaining versus manpower -- ~------6.8 Initial gamma contamination and residua! percentages after decontamination operations, Shot 2 ---- ------2- screen picture after H-hour et about H + 4 seconds ~--~------------~-Third 6.9 6.10 Progress of shock front at H + 22 seconds --~--~----- e-em 14 68 69 79 81 83 85 86 87 88 89 90 90

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