Levels of thorium, uranium and potassium in Brazilian geological sediment determined by gamma-ray spec-troscopy and instrumental neutron activation analysis. Brazilian Journal of Radiation Sciences, Rio de Janeiro, Brazil, v. 10, n. 3B (Suppl.), 2023. DOI: 10.15392/2319-0612.2022.1984. Disponível em: https://www.bjrs.org.br/revista/index.php/REVISTA/article/view/1984. Acesso em: 2 may. 2025.