MOHAMMED, L.; HUSSAIN, A. Universal empirical relationship between efficiency of scintillation detector NaI(Tl) with gamma ray energy and distance using gamma spectroscopy (UCS-20). Journal of Education and Science (JES), [S. l.], v. 21, n. 3, p. 138–152, 2008. DOI: 10.33899/edusj.2008.56030. Disponível em: https://ojs.uomosul.edu.iq/index.php/edusj/article/view/23526. Acesso em: 6 aug. 2025.