0018933 TABLE OF CONTENTS 6 ABSTRACT . 6 6 ee ee ee ee ee tt ee ee PREFACE © © © © © © © © # HH CHAPTER l. INTRODUCTION .....-+ 6+ «+ «+ © © © s+ * © Objectives 1.2 Background and Theory 2 6 2 HF 8 8 © * ees 11 1.2.1 Formation and Nature of Fallout Particles: * * + °* * 1.2.2 Cloud Development .- +--+ + + ee + se 1.2.3 Transport and Distribution- - + + + + + + * * * * ¢ Procedures for the Determination of Fallout Partition ., 14 19 20 23 26 28 30 for Several Radionuclides 32 1.2.4 1.2.5 1.2.6 1.2.7 1.2.8 ee es © ee © + + +--+ Prior Estimates of Local Fallout ..-- +++ +e «+ World Wide Fallout. . . 2... 1. 1. 2 1 ee ew ewe Fractionation Effects (I): Observations at other Tests . Fractionation Effects (II): Relations among the R-Values ....., 34 ¢ OW kwWN * e — CHAPTER 2. Ww WwW Ww WwW Ww 1.3 Experimental Program a PROCEDURE Instrumentation 2.2e1 34 356 36 Outline of the Program... ..-+.. . .- +--+ © + + «© + + Rocket Sampling of Clouds Aircraft Sampling of Clouds + - + + + + + + + + + Aircraft Sampling of Fallout. . - - - +--+ ss s+ es Selection of Radionuclides soe ee ee ee ee «- Ze 1 Shot Par tic ipation 2.2 11 il ee ee ee ee ee 6 6 1.1 © © + © + + ACKNOWLEDGMENTS... + «© © = © «© «© © © © © © © © 8» © © © © © © #© © © # © @ ++ + «+ «© © » «© « «© © © © © © © © « +--+ © + © + © + @ + oe © eh 40 - Rocket-Borne Cloud Sampler © © 37 39 8 © © © @ 40