Environmental dosimeter of the thermoluminescent type
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)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-29-024306
- Assignee:
- to United States Atomic Energy Commission
- Patent Number(s):
- US 3789227
- OSTI ID:
- 4310975
- 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
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