THE CONTINUOUS DOSIMETRY BY USE OF THE CHEMICAL DOSIMETER (in Japanese)
Continuous electric measurements were applied to rapid and continuous dosimetry using chemical systems. In the Fricke dosimeter, ferrous iron is oxidized to ferric iron in an air-saturated solution of ferrous sulfate in 0.8N sulfuric acid. The chemical change is easy to follow through the measurement of the oxidation-reduction potential of the ferrous-ferric iron couple. Here a zero current potentiometry was applied to the simple continuous dosimetry. The error was within 2 per cent under suitable condi tions. Good reproducibility over the wide range for the potential measurements was an important feature. The radiation-induced chemical reaction of aqueous chloral hydrate solutions is the conversion of chloral hydrate to hydrochloric acid. The chemical change is easy to follow through the measurement of electric conductivity since the main reaction consists in the conversion of the very siightiy ionized organic molecule to a highiy ionized inorganic halide. Consequently, the continuous measurement of electric conductivity was used for chemical dosimetry. The reproducible data obtained suggest that this system can be used as a dosimeter for lower doses of gamma irradiation. Aqueous hydrochloric acid solution of stannous ion, exposed to the gamma irradiation from cobalt-60, yields stannic ion as the product. Formed stannic ion was determined continuously by polarography during the irradiations. The reduction of stannic to stannous ion produced waves suitabie for the analytical purpose when the supporting electrolyte was 6N hydrochloric acid. The reproducible data obtained on the diffusion current measurement of stannic ion suggest that this system can be used as a dosimeter for higher doses of irradiation. (A.G.W.)
- Research Organization:
- Radiation Center, Osaka Prefecture
- NSA Number:
- NSA-17-030097
- OSTI ID:
- 4699077
- Journal Information:
- Proc. Japan Conf. Radioisotopes, Vol. Vol: 5th, No. 3; Other Information: Orig. Receipt Date: 31-DEC-63
- Country of Publication:
- Country unknown/Code not available
- Language:
- Japanese
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Related Subjects
AIR
CHEMICAL RADIATION DETECTORS
CHEMICAL REACTIONS
COBALT 60
CURRENTS
DIFFUSION
DOSEMETERS
ELECTRIC CONDUCTIVITY
ELECTROLYTES
GAMMA RADIATION
HYDROCHLORIC ACID
IONS
IRON
IRON SULFATES
IRRADIATION
MEASURED VALUES
OSCILLATIONS
OXIDATION
POLAROGRAPHY
REDUCTION
SOLUTIONS
SULFURIC ACID
TIN