Abstract: The Greenhouse operation consisted of a series of four shots conducted at Eniwetok during the Srping of 1951. The external neutron threshold measurements consisted of the use of good samples to measure integrated thermal neutron fluxes and sulfur, iodine, and zirconium samples to measure fluxes of higher-energy neutrons. The iodine also measured high-energy gamma-ray intensity. Measurements were also made on slow- and fast-neutron intensities as a function of time. Major Descriptors: *GAMMA SPECTRA -- ACTIVATION DETECTORS; *GREENHOUSE PROJECT; *NEUTRON FLUX -- ACTIVATION DETECTORS; *NUCLEAR EXPLOSIONS -GAMMA SPECTRA; *NUCLEAR EXPLOSIONS -- NEUTRON FLUX Descriptors: FAST NEUTRONS; GOLD; IODINE; NEUTRON DETECTORS; SAMPLING; SULFUR; THERMAL NEUTRONS; TIME DEPENDENCE; ZIRCONIUM Broader Terms: BARYONS; ELEMENTARY PARTICLES; ELEMENTS; EXPLOSIONS; FERMIONS; HADRONS; HALOGENS; MEASURING INSTRUMENTS; METALS; NEUTRON DETECTORS; NEUTRONS; NONMETALS; NUCLEAR EXPLOSIONS; NUCLEONS; RADIATION DETECTORS; RADIATION FLUX; SPECTRA; TRANSITION ELEMENTS Subject Categories: 450202* Weaponry -- (-1989) 10/5/524 01877561 Author(s): -- Explosions & Explosives -~ Nuclear -- tItem 224 from file: ERA-12-005103; Hall, W.C. 103) EDB-87-005194 Title: Operation Greenhouse. Scientific Director’s report of atomic weapon tests at Eniwetok, 1951. Annex 1.1. Prompt-gamma-ray measurements. Part 2. Prompt-gamma-ray intensity as a function of time Corporate Source: Naval Research Lab., Washington, DC (USA) Publication Date: 1 Sep 1985 p V1 Report Number(s): AD-A-995350/6/XAB Document Type: Report Language: English Journal Announcement: EDB8611 Availability: NTIS, PC AO4/MF AOl. Subfile: BRA (Energy Research Abstracts). GRA (NTIS NTS) Country of Origin: United States Country of Publication: United States Abstract: This report describes the procedure followed and the results obtained in measuring, as a function of time, the prompt gamma radiation emitted within 1,000 seconds after the explosion of the atomic weapons studies in Operation Greenhouse. The design of the experiment and a description of the equipment are given. The fast coaxial scintillation detectors for the Greenhouse test were used without collimators at a distance of several mean free paths from the source. Numerous factors complicated the interpretation of the data obtained, thus reducing the accuracy that may be ascribed to the results. The probable peak gamma-ray intensity, the time of occurrence of the peak, and the prompt-gamma decay curves as a function of time were obtained for each shot. A composite decay curve fitting all the shots was obtained, and from this, a scaling factor was deduced which related the shot energy to the gamma-ray intensity. Major Descriptors: *GREENHOUSE PROJECT; *NUCLEAR EXPLOSIONS RADIATION; *PROMPT GAMMA RADIATION -- MEASURING METHODS Descriptors: DECAY; SCINTILLATION COUNTERS Broader Terms: ELECTROMAGNETIC RADIATION; EXPLOSIONS; IONIZING RADIATIONS; RADIATION DETECTORS; Subject Categories: Weaponry -- 10/5/525 01877560 Author(s): Baker, MEASURING INSTRUMENTS; RADIATIONS 450202* (-1989) J.W.; GAMMA RADIATION; NUCLEAR EXPLOSIONS; -- Explosions & Explosives -- Nuclear -- (Item 225 from file: 103) ERA-12-005102; EDB-87-005193 Reed, D.J. -- PROMPT GAMMA Gauvin, H.P.; Cahill, J.P.; Grenier, J.W.; Title: Operation Hardtack. Project 8.8. Thermal radiation from low-yield nuclear bursts. Report for April-October 1958 Corporate Source: Kaman Tempo, Santa Barbara, CA (USA) 9003800