Affiliation: | a ENEA-TEC/IRR, via Anguillarese 301, 00060 S.Maria di Galeria, Rome, Italy b Department of Inorganic Materials, East China University of Science & Technologies, Shangai 200237, People's Republic of China c Institute of Physics AS CR, Cukrovarnicka 10, 16253, Prague, Czech Republic d Stazione Sperimentale del Vetro, via Briati 10, 30121 Murano- Venezia, Italy e INFN & Department of Physics, University of Padova, via Marzolo 8, 35131 Padova, Italy |