Methodology study for determining the half-value layer using the Monte Carlo code PHITS. Brazilian Journal of Radiation Sciences (BJRS), Rio de Janeiro, Brazil, v. 12, n. 3, p. e2483, 2024. DOI: 10.15392/2319-0612.2024.2483. Disponível em: https://bjrs.org.br/revista/index.php/REVISTA/article/view/2483. Acesso em: 17 jul. 2025.