The influence of the dielectric surrounding medium on energy levels and optical responses of an on-center impurity in a core/shell spherical nanodotA. Ed-Dahmouny, N. Zeiri, A. Sali, N. Es-Sbai, R. Arraoui, M. Jaouane, A. Fakkahi, K. El-Bakkari, N. Yahyaoui and C. A. DuqueEur. Phys. J. Plus, 139 7 (2024) 599DOI: https://doi.org/10.1140/epjp/s13360-024-05418-2