Electronic Systems 10/5/608 01678147 Author(s): (Item 308 from file: 103} ERA-11-006172; EDB-86-005067 Alger, R.S.; Dyson, J.P.; Levy, R.A.; McQuilling, D.W. Title: Operation GREENHOUSE. Scientific Director’s report. Annex 5.1 Annex a. Alkali halide and phosphate glass radiological casualty dosimeters Corporate Source: (USA) Publication Date: Report Number(s): Document Type: Naval Radiological Defense Lab., Jul 1951 San Francisco, p 40 i CA AD-A-995250/8/XAB Report Language: English Journal Announcement: EDB8510 Availability: NTIS, PC A03/MF AOl. Subfile: ERA (Energy Research Abstracts). Country of Origin: United States Country of Publication: United States Abstract: Photochemical reactions induced by ionizing radiations can produce color centers in alkali halide crystals and fluorescent centers in silver-bearing phosphate glasses. These reactions are being investigated as a basis for casualty~badge radiation dosimeters. Potassium bromide and potassium chloride crystals were satisfactorily sensitized by héating in a combined atmosphere of alkali vapor and hydrogen. Doses of 25 r of cobalt 60 gamma rays were detected by the visible color changes in sensitized KBr and KCl. The sensitivity of the phosphate glass is comparable to the crystals; however, a reading device is needed for the fluorescent measurements. The crystals and glasses are strongly energy dependent for x-ray energies below about 150-kV effective. In a test atomic bomb detonation the crystals and glasses were exposed to total dosages of 17 to 4,460 r at varying dosage rates. In general, there was a good agreement among the dosage readings for samples of a given material but the readings for different materials varied from 0.81 to 2.3 times the readings obtained with National Bureau of Standards (NBS) film badges. Major Descriptors: *GREENHOUSE PROJECT; *NUCLEAR EXPLOSIONS -- DOSIMETRY; *NUCLEAR WEAPONS -- TESTING; *RPL DOSEMETERS -- PERFORMANCE Descriptors: ALKALI METAL COMPOUNDS; BROMIDES; CRYSTALS; FLUORESCENCE; HALIDES; HYDROGEN; PHOSPHATE GLASS; PHOTOCHEMICAL REACTIONS; POTASSIUM COMPOUNDS; VAPORS Broader Terms: ALKALI METAL COMPOUNDS; BROMINE COMPOUNDS; CHEMICAL REACTIONS; DOSEMETERS; ELEMENTS; EXPLOSIONS; FLUIDS; GASES; GLASS; HALIDES; HALOGEN COMPOUNDS; LUMINESCENCE; LUMINESCENT DOSEMETERS; MEASURING INSTRUMENTS; NONMETALS; NUCLEAR EXPLOSIONS; WEAPONS Subject Categories: 450202* -- Explosions & Explosives -- Nuclear -- Weaponry ~-- (-1989) 440101 -=- Radiation Instrumentation -- General Detectors or Monitors & Radiometric 10/5/6098 01678146 Author(s): Instruments (Item 309 from file: 103) ERA-11-006171; EDB-86-005066 Leroy, G.V. Title; Operation GREENHOUSE. Scientific Director’s report. Annex 2.10. Miscellaneous studies of dosimeters Corporate Source: Chicago Univ., IL (USA) Publication Date: Nov 1951 p 293 Report Number(s): AD-A-995248/2/XAB Document Type: Report Language: English Journal Announcement: EDBS&510 Availability: NTIS, PC AO3/MF AQl. Subfile: ERA (Energy Research Abstracts) . Country of Origin: United States Country of Publication: United States Abstract: Glomerella, corn, and Vycor glass were used in an attempt to ond ex ory ca