N. K. Sethy, Sarjan Singh, V. N. Jha, Gopal Verma, S. K. Jha, M. S. Kulkarni
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Field Evaluation of an Encapsulated 226Ra–222Rn Source
A closed container having a specified quantity of 226Ra was constructed as encapsulated 226Ra–222Rn source. The source in the form of a modified Lucas cell (LC) was used for standardization of Lucas cell alpha counting system. The performance of the prepared source was evaluated by simultaneous measurement of dissolved radon in water by Lucas cell method using alpha counting system and Alpha guard. Radon alpha counting system measures dissolved radon in water sample by gross alpha counting of aerated dissolved transferred to LC. The same samples were also measured simultaneously by Alpha guard using instant measurement of emanated radon in a closed circuit. The gross alpha counting method using the radon counting system produced result that is closely matching with the Alpha guard measurement. This validates the calibration of radon counting system by designed encapsulated source. The study provides an alternative for calibration in the absence of expensive radon source available in the market.
期刊介绍：
MAPAN-Journal Metrology Society of India is a quarterly publication. It is exclusively devoted to Metrology (Scientific, Industrial or Legal). It has been fulfilling an important need of Metrologists and particularly of quality practitioners by publishing exclusive articles on scientific, industrial and legal metrology.
The journal publishes research communication or technical articles of current interest in measurement science; original work, tutorial or survey papers in any metrology related area; reviews and analytical studies in metrology; case studies on reliability, uncertainty in measurements; and reports and results of intercomparison and proficiency testing.
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