CONTENTS Foreword iii Preface . lv TE Physical, Chemical, and Radiological Characteristics of Atmospheric Radioactivity and Fallout Edward C. Freiling, Chairman Nuclear-debris Formation. . . Edward C. Freiling, Glenn R. Crocker, and Charles E. Adams Small Boy Shot Fallout Research Program _. 44 Carl F. Miller and James D. Sartor Radiochemical-data Correlations on Debris from Silicate Bursts oe . Glenn R. Crocker, Francis K, Kawahara, and Eduard C. Freiling 72 Long-range Fallout from Sedan and Small Boy Shots 82 Physical Characteristics of Single Particles from High-yield Air Bursts . . 98 Philip W. Krey and Ralph E. Fried P, Benson, C. E, Gleit, and L. “Leventhal Radiochemical Fractionation Characteristics of Single Particles from High-yield Air Bursts P. Benson, C. E. Gleit, and L. Leventhal Distribution of Airborne Radioactivity with Particle SIZE 2. kw lk kk ee lk le Luther B. Lockhart, Jr., Robert L. Patterson, dyY., and Alien W. Saunders, JY. 108 119 Particle Size Distribution of Stratospheric Aerosols at 110,000 Ft . Peter Loysen . . . 2. eee es 134 Chemical State of Tritium in the Atmosphere and Sources of Tritiated Methane. . 144 Particle Analysis Program at Lawrence Radiation Laboratory. . : 150 A. Haines and B. Musgrave Robert E. Heft and James S. Kahn vii