科研之友
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摘要
A method for measuring the total activity of inhomogeneously distributed radioactive waste in a barrel is proposed. The method bases on a measurement of the attenuation of gamma-rays as a function of energy. It can be applied to gamma-ray emitters radiating at several energies over a broad energy range. The method is sensitive enough to measure activities of 10(4) Bq of Ra-226 in 200 L barrels filled with a water-equivalent matrix in one day using a shielded detector with a relative efficiency of 50 %. The sensitivity to Ra-228 is better, since here high-energy gamma-rays are emitted with a larger probability.
- 出版日期2015-4
