vate: FUDLICaTIiONn Report Number(s): i sep P 1955 24> AD-A-995396/9/XAB Document Type: Report Language: English Journal Announcement: EDB8611 Availability: NTIS, PC All/MF AOQl. Subfile: ERA (Energy Research Abstracts). Country of Origin: United States GRA (NTIS NTS) Country of Publication: United States Abstract: Curves of absorption of gamma rays in boron carbide and a few points on the absorption curve in lead were obtained during the three atomic explosions of Operation Sandstone. Radiation was detected by integrating ionization chambers and by photographic emulsions. A few recording-type ionization chambers were used to give intensities as a function of time. Radiation detectors were located inside of shelters which protected them from blast and shielded them from scattered radiation. Because of geometry, scattered radiation was negligible and the analysis of absorption curves yields the true total absorption coefficient for the radiation. Major Descripters: *GAMMA SPECTRA -- MEASURING METHODS; *NUCLEAR EXPLOSIONS -~ GAMMA SPECTRA; Descriptors: *SANDSTONE PROJECT BORON CARBIDES; SHELTERS Broader Terms: BORON COMPOUNDS; CARBIDES; NUCLEAR EXPLOSIONS; SPECTRA Subject Categories: 450202* Weaponry -- (71989) CARBON COMPOUNDS; EXPLOSIONS; -- Explosions & Explosives -- Nuclear -- 10/5/5008 (Item 208 from file: 103) 01877596 BRA-12-005123; EDB-87-005229 Author(s): Mullaney, J.F.; Cadenhead, C.P.; Cooper, R.S.; Humphrey, R.W. Title: Operation Hardtack. Project 10.1. Report to the Scientific Director. Fireball yields Corporate Source: Los Alamos National Lab., NM (USA) Publication Date: 1 Sep 1985 p 18 Report Number(s): AD-A-995392/8/XAB Document Type: Report Language: English Journal Announcement: EDB8611 Availability: NTIS, PC A0Q2/MF AOl. Subfile: ERA (Energy Research Abstracts). Country of Origin: United States Country of Publication: United States Abstract: GRA (NTIS NTS) The yields for the LASL shots of Operation Hardtack, Project 10.1, were calculated from fireball diameter-time data using several related methods. Data were obtained with high-speed motion-picture photography. Zero-frame time was determined by comparing the fireball diameters obtained from the motion-picture film with the diameter-time curve. Other methods and techniques used for determining and calculating yields are given. Major Descriptors: FIREBALLS; *HARDTACK PROJECT; *NUCLEAR FIREBALLS *NUCLEAR EXPLOSIONS -- PHOTOGRAPHY; -- NUCLEAR *NUCLEAR FIREBALLS -- YIELDS Broader Terms: EXPLOSIONS; Subject Categories: Weaponry -- 450202* (-1989) FIREBALLS; NUCLEAR EXPLOSIONS -- Explosions & Explosives -- Nuclear -- 10/5/509 (Item 209 from file: 103) 01877595 BRA-12-005122; EDB-87-005228 Author(s): Parker, W.J.; Jenkins, R.J.; Inn, E.C.Y. Title: Operation Hardtack. Project 8.4. Early-time spectra of very-high-altitude nuclear detonations Corporate Sourde: Naval Radiological Defense Lab., San Francisco, (USA) Publication Date: Report Number(s): o005 149 1 Sep 1985 p 22 AD-A-995391/0/XAB CA