e e e e e ° e e e s e e e @ ° ° e e e e e e e e ° e . ° INTRODUCTION te 1. i Objective e e 1.3 Background «© © 1.2 Military Significance CHAPTER 2 2.1 e e e o e e e eo e e e e e e s e e e e e e e e «© © © © e@© © %®» # @ ¢ @ © EXPERIMENTAL DESIGN . © e@ « « 6 4. ee # # @ 2 e3 Timing 2 or Mountings e 2 e6 Operat fons e 267 2.5 e © e e e . «© e e oe «© o e » © The Intermittent Fallout. Collector 2.2 Design Criteria - * e oe e e 6 © 6 6 e e « e e e e e e e ° ° ° e ° e e e . e @ e e e e e e Recovery and Shipment of Samples ee e © «© #© «© @ Project Participation. s Pr er ee e er a e 1 @ ® CHAPTER e ° 2 ACKNOWLEDGMENTS. e a FOREW RD. e e e e . ° ABSTRACT e¢.|6° CONTENTS CHAPTER 3 RESULTS . . «© «© © © © «© «© « e @« © » 3.1 General . . 3.2 Beta Counting Equipment, “Techniques, "and Corrections 3.3.1 Shot 1 o e o ° e 3.3.2 Shot 2 e e e ® e 3.3.3 Shot 3 ° e e e 34364 Shot 4 e ° e «¢ 3.3.5 Shot 6 ° e e Beta Activity . ° e ° ° ° e e e e e e es e e e ° e e e e ° e e e a e eo eo e e e ° ° e e e e 7 2 Decay Exponent Variations o . 0 ee ew el 3.4.2 Interval and Cumulative "Activities from Intermittent Fallout Collector Samples Cloud Action Bused Upon Cloud Photography e ° e e e ° 3.43 Activity in the Base Surge. « e e# # e 3. bed Fallout at Elmer e e . e ° . e e eo 8 @ e e Beta Activity Concentrations e #© oe e# © ee © © o we e« @ ° ew @# ° Beta Energy Measurements e ° © e e e e e @ ° . e ° e e ° 8 and Wind Vectors 3.5 Ganma Activity ° 3.7 3.8 Gamma. Energy Spectrum 3.6 e @ 3.4.1 e &© 3.3.6 s e 3.8.1 3.5.2 e e e Gamma Counting Equipment and Techniques Procedure Used in Analysis of Curves . ry . . @¢ 3.4 Extrapolation of Beta Activities to Sampling Time a 3.3