GAMMA-RAY DOSIMETRY IN AN IRRADIATION CAVITY OF THE 2000 CURIE COBALT-60 FACILITY
Dose rates were calculated and measured for a 2000-c Co/sup 60/ irradiation facility. The Fricke ferrous sulfate dosimeter, utilizing the ferrous-ferric reaction, was applied to the experimental work. A few Ag- activated phosphate glass needles were also used in parallel with the chemical dosimetry. A mathematical calculation of dose rates was performed for comparison with the experimental results. The comparison showed that experimental results were in reasonably good agreement with calculated values. The discrepancy was presumably due to the Fricke dose rates being spatially averaged values of gamma intensities in the regions occupied by the dosimeter solutions, and due to several assumptions on which the mathematical calculation was performed. Considering many conditions, the dose rate at the center of the cavity was determined with a probable error of about 5%. The Fricke chemical dosimetry was shown to be the most favorable method for the radiation fields of multikilocurie gamma sources, while the Ag-activated phosphate glass needles seemed to have some advantage over the chemical method, especially for isodose mapping of gamma fields. (auth)
- Research Organization:
- Kyoto Univ.
- NSA Number:
- NSA-14-011752
- OSTI ID:
- 4173869
- Journal Information:
- Bull. Inst. Chem. Research, Kyoto Univ., Vol. Vol: 37; Other Information: Orig. Receipt Date: 31-DEC-60
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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