“Positron Annihilation Lifetime Study on free Volume Changes in TLD by Gamma - irradiation”, Baghdad Sci.J, vol. 1, no. 1, pp. 144–148, Jun. 2004, Accessed: Jul. 05, 2024. [Online]. Available: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/515