PubMed · 7204031
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R C Bates. 1980. Time-dependent 222Rn samples loss from small samples.. https://pubmed.ncbi.nlm.nih.gov/7204031/
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A method of neutron-activation radiography was employed to investigate U distribution in leaves of plants (poplars, birches), growing in areas of mining ores with a high level of U which penetrates plants from the soil via the root system and appears on the surface of leaves, repeating their macrostructure. U also falls out on the surface of leaves in radioactive dust. The shapes of U manifestation permit the identification of its routes of penetration of the leaves of plants. Local U concentration even in an insignificant total excess of a radiation background can be considerable, leading to the destruction of tissues of plants as a result of alpha-radiation of U nuclei. A conclusion has been made of the danger of contamination of agricultural plants, growing in areas with ecological problems.
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Continuous 226Ra in water monitoring has wide application in uranium mining and milling areas, particularly since present practice is to use grab sampling. In this work, a continuous monitor based on 222Rn de-emanation and alpha scintillation counting is developed and tested. The critical parameters associated with the method are identified, and optimum operating conditions determined. For the laboratory scale proto-type constructed, the lower limit of detection is 0.5 pCi Ral-1 at an overall sensitivity of 2 counts per hr per pCi Ra per l. and a response time fo about 2 hr.