Franck Condon analysis of emission and excitation spectra of fused silica materials Mariem Guesmi, Tomas Thor, Oumayma Taboubi, Ivana Šeděnková, Yadu Ram Panthi, Jiri Pfleger and Karel Zidek EPJ Web Conf., 287 (2023) 05025 Published online: 18 October 2023 DOI: 10.1051/epjconf/202328705025