Abstract
THE ‘Fricke’ solution is the most common chemical dosimeter in use at present, but the G-value of the oxidation is still not universally accepted. We have redetermined this value by radiolysis with 100–250 mc. phosphorus-32 dissolved in air-saturated 0.8 N sulphuric acid containing 10−3 M ferrous ions (as ferrous ammonium sulphate) and 10−3 M chloride (as sodium chloride). The energy dissipated by the radioactive decay was determined from standardization of the radioactivity by 4π-proportional counting as well as 4π-liquid scintillation counting, and an acceptance of the calculated value1 of 0.69 MeV. for the average energy per disintegration of phosphorus-32.
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References
Hine, G. J., and Brownell, G. L., “Radiation Dosimetry” (Academic Press, New York, 1956).
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PEISACH, M., STEYN, J. Radiolytic Oxidation of Ferrous Solutions with Standardized Internal Sources of Phosphorus-32. Nature 187, 58–59 (1960). https://doi.org/10.1038/187058a0
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DOI: https://doi.org/10.1038/187058a0
