Geological materials usually contaminated with naturally occurring radioactive materials (NORM) have become a focus of great attention. The radioactivity concentrations of 226Ra. 232Th and 40K in some ornamental stones in Egypt. were measured using a high-resolution gamma ray spectrometer. https://www.diegojavierfares.com/special-offer-Salvation-Vinyl-LP-great-price/
Natural radioactivity levels and evaluation of radiological hazards in some Egyptian ornamental stones
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