CONTENTS Page l. 2. INTRODUCTION 1.1 1.2 PROCEDURE 2.1 2.2 2.3 General . . Treatment of Neutron "Flux Data. Neutron Sensitivity of Gamma Detectors. 2.4 Detector Shield Correction. 2.6 Comparison of LASL and ESL Film Data. 2.5 3. 17 17 Objective . Background. . Interactions of Neutrons with Soil. RESULTS 3.1 3.2 Operation Sandstone Operation Ranger. 3.3 Operation Greenhouse. 3.5 Operation Tumbler-Snapper 3.4 3.6 3.7 3.8 Operation Buster-Jangle Operation Ivy... Operation Upshot- Knothole Operation Castle. 3.9 3.10 3.11 Operation Teapot. Operation Redwing . Operation Plumbbob. 3.12 Operation Hardtack. 3.13 3.14 Operation Sun Beam. . . Overation Fish Bowl . . APPENDIX REFERENCES TABLES Lea 2.1 2.2 Nuclear Devices for Which Initial Gamma Measurements are Reported. . ‘ : Recommended Dosimeters anges . Neutron Activation Detectors. 19 24 23