Huynh, C., Vo, N., Le, T., Nguyen, L., Tran, T. and Tran, T. 2017. The effect of the diameter of the detector collimator on saturation thickness in gamma scattering measurement. VNUHCM Journal of Advanced Research in Natural Sciences. 1, T3 (Sep. 2017), 68-78. DOI:https://doi.org/https://doi.org/10.32508/stdjns.v1iT3.466.