Environmental dosimeter of the thermoluminescent type
Abstract
A dosimeter for accurately monitoring normally low-energy radiation including a thermoluminescent CaF phosphor enclosed within a tantalum capsule is described. The tantalum acts as a filter to weaken the measured dose due to photons having energies below about 0.2 MeV. Tantalum end caps are maintained on the capsule body by a polyolefin sheath formed from heat-contractable tubing. After exposing the dosimeter to environmental radiation, it is placed in a shielded chamber for about 24 h and subsequently annealed at about 80 deg C to release radiation energy accumulated in low-temperature traps. The dosimeter is then disassembled and the phosphors photometrically read at temperatures about 50 deg C to determine the absorbed radiation dose. (Official Gazette)
- Inventors:
- Issue Date:
- Research Org.:
- Originating Research Org. not identified
- OSTI Identifier:
- 4310975
- Patent Number(s):
- 3789227
- Assignee:
- to United States Atomic Energy Commission
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01T - MEASUREMENT OF NUCLEAR OR X-RADIATION
- NSA Number:
- NSA-29-024306
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 1973 May 18; Other Information: G01t1/11. Orig. Receipt Date: 30-JUN-74
- Country of Publication:
- United States
- Language:
- English
- Subject:
- N46120* -Instrumentation-Radiation Detection Instruments- Radiation Dosimeters; *ENVIRONMENT- RADIATION MONITORING; *THERMOLUMINESCENT DOSEMETERS- DESIGN; CALCIUM FLUORIDES
Citation Formats
Eichner, F N, and Kocher, L F. Environmental dosimeter of the thermoluminescent type. United States: N. p., 1974.
Web.
Eichner, F N, & Kocher, L F. Environmental dosimeter of the thermoluminescent type. United States.
Eichner, F N, and Kocher, L F. Tue .
"Environmental dosimeter of the thermoluminescent type". United States.
@article{osti_4310975,
title = {Environmental dosimeter of the thermoluminescent type},
author = {Eichner, F N and Kocher, L F},
abstractNote = {A dosimeter for accurately monitoring normally low-energy radiation including a thermoluminescent CaF phosphor enclosed within a tantalum capsule is described. The tantalum acts as a filter to weaken the measured dose due to photons having energies below about 0.2 MeV. Tantalum end caps are maintained on the capsule body by a polyolefin sheath formed from heat-contractable tubing. After exposing the dosimeter to environmental radiation, it is placed in a shielded chamber for about 24 h and subsequently annealed at about 80 deg C to release radiation energy accumulated in low-temperature traps. The dosimeter is then disassembled and the phosphors photometrically read at temperatures about 50 deg C to determine the absorbed radiation dose. (Official Gazette)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1974},
month = {1}
}