Order number 940406-165953-13 -001-001 page 5 set 5 with 341 of 341 items REDWING; NAVAHO BURST; PROMPT GAMMA RADIATION; GAMMA DETECTION; GAMMA RADIATION; DISTANCE KEYWORD (8S) 801. Item 8 150. 110. 72. 710. REPORT NUMBER PRIMARY TITLE (M) WT--904 Ground level pressures from surface bursts. Project 1.2a [of] Operation Castle PERSONAL AUTHOR/AFFIL Broyles, C.D.; Merritt, M.L. CORPORATE SOURCE Sandia Corp., Albuquerque, NM (United States) 371. PUB. DATE (YYMMDD) 34. 36. CLASSIF. CLASSIF. 950. ABSTRACT 571030 LEVEL TEXT Secret CATAGORY TEXTRestricted Data The objective of Project 1.2a was to study ground-level pressures from surface bursts. Measurements were made with Wiancko gages mounted flush with the ground. When the hydrodynamic fireball yields are the 801. reference yields peak pressures generally correspond to about 1.6W instead of 2W free air. However, duration and positive pressure impulses correspond to somewhat greater than 2W. Shot 3 was detonated in the rain and showed the effects thereof in low pressures and rounded wave-forms. Nonideal waveforms obtained from most of the shots indicate that water does not constitute a perfectly reflecting surface, as has sometimes been assumed. . KEYWORD (S) SURFACE BURSTS; CASTLE; PRESSURE MEASUREMENT; PEAK PRESSURE;GROUND LEVEL Item 9 150. 110. REPORT NUMBER PRIMARY TITLE (M) WT--952 External neutron measurements. Operation Castle Project 14.1 [of] 72. PERSONAL AUTHOR/AFFIL Biggers, W.A.; Brown, L.J.; Kohr, K.C. 710. CORPORATE SOURCE Los Alamos Scientific Lab., 371. 34. 36. PUB. DATE (YYMMDD) 551000 CLASSIF. LEVEL TEXT Secret CLASSIF. CATAGORY TEXTRestricted Data 801. KEYWORD (S) 950. ABSTRACT 9003202 NM (United States) The external neutron threshold measurements made at Operation Castle in the spring of 1954 consisted of the use of zirconium, arsenic, iodine, thallium, and sulfur to measure the higher energy neutron flux, and gold samples to measure the thermal neutron flux. The iodine also measured high-energy gamma ray intensity. Measurements were made on five shots: Shrimp, Runt I, Alarm Clock, Runt II, and Zombie. CASTLE; NEUTRON MEASUREMENTS ;NEUTRON DETECTORS; THRESHOLD DETECTORS; ZIRCONIUM; ARSENIC; IODINE; THALLIUM;