ILLUSTRATIONS (Continued) Page Plan View of a Typical Fall-out Particle Deposited on 4.4 Inverted View of Typical Particles Removed from 4.5 4.6 4.7 4.8 4.9 Life-float Decking Life-float Decking . . : Typical Life-float Section . Particle Deposition on Life-float Decking . . . . Beta and Gamma Decay Curve from 15 to 90 Days After Shot Mags Distribution of Fall-out (g/sq ft) . . Variation of Cross-wind Fall-out with Distance from Ground Zero . 4.10 Size Distribution of Radioactive Particles a z sa Function of Time and Distance. 4.11 Periods of Primary Fall-out at Different Stations CHAPTER 5 5.1 5.2 6.1 Periods of Secondary Fall-out at the Outer Island Stations C.1 44 45 46 49 30 METEOROLOGICAL CONSIDERATIONS AND FORECASTS OF FALL-OUT Predicted Area of Primary Fall-out . APPENDIX C 37 38 38 42 43 SECONDARY FALL-OUT Radioautograph of Secondary Fall-out Particles CHAPTER 6 36 52 ELECTRONIC TRIGGER MECHANISM Schematic Diagram of the Electronic Trigger Mechanism. 68 TABLES CHAPTER 3 3.1 Instrumentation at Land and Lagoon Stations at Eniwetok Atoll . CHAPTER 4 4.1 4.2 4.3 B.3 B.4 B.5 32 PRIMARY FALL-OUT Spectrographic Analysis of the Radioactive Particles Removed from the Life~float Decking X-ray-diffraction Analysis of Radioactive Particles Removed from the Differential Fall-out Collectors Size Distribution of Radioactive Fall-out Particles APPENDIX B B.1 B.2 INSTRUMENTS 39 40 47 TABULATED DATA Weight and Activity of Solid Fraction of Collected Material Volume and Activity of Liquid Fraction of Collected Material . Total Activity and Total Mass of Collected Material . Secondary Fall-out Data, Gummed-paper Collectors Free-floating Sea Stations . . 8 . . 60 61 62 63 86 Th RRRRERE Toh SN EON: 4.3