PHAM, D. Q. Determination of the dead time of the TCS-172 gamma survey meter using the two source method. Hue University Journal of Science: Natural Science, [S. l.], v. 134, n. 1D, 2025. DOI: 10.26459/hueunijns.v134i1D.7957. Disponível em: https://jos.hueuni.edu.vn/index.php/hujos-ns/article/view/7957. Acesso em: 27 dec. 2025.