Thorium, uranium and potassium levels in Brazilian geological sediment as determined by gamma-ray spectroscopy and instrumental neutron activation analysis. Braz. J. Radiat. Sci. [Internet]. 4 de diciembre de 2022 [citado 21 de julio de 2025];10(3B (Suppl.). Disponible en: https://www.bjrs.org.br/revista/index.php/REVISTA/article/view/1984