Source-detector effective solid angle calculation using MCNP6 code. Brazilian Journal of Radiation Sciences, Rio de Janeiro, Brazil, v. 9, n. 1A, 2021. DOI: 10.15392/bjrs.v9i1A.1471. Disponível em: https://www.bjrs.org.br/revista/index.php/REVISTA/article/view/1471. Acesso em: 17 may. 2025.