Synthesis, physical, optical properties, and gamma-ray absorbing competency or capability of PbO–B2O3–CaO glasses reinforced with Nd3+/Er3+ ionsY. Al-Hadeethi, M. I. Sayyed, Bahaaudin M. Raffah, E. Bekyarova, Abid Ali Abid and Y. S. RammahEur. Phys. J. Plus, 136 2 (2021) 189DOI: https://doi.org/10.1140/epjp/s13360-021-01174-9