MOHAMMED, L.; لیث; HUSSAIN, A.; علی; أحمد. 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://rjps.uomosul.edu.iq/index.php/edusj/article/view/17529. Acesso em: 4 aug. 2025.