caa a22 4500 467923736 CHVBK 20180406152924.0 cr unu---uuuuu 170328e20060301xx s 000 0 eng 10.1134/S1087659606020052 doi (NATIONALLICENCE)springer-10.1134/S1087659606020052 Radiation-induced color centers in γ-irradiated glasses in the Na2O-Nb2O5-P2O5 system [Elektronische Daten] [E. Avdeeva, T. Bocharova, G. Karapetyan, A. Mironov] The specific features of the induced optical absorption spectra of glasses in the 45Na2O · xNb2O5 · (55 − x)P2O5 system with Nb2O5 contents x = 5, 10, 20, 25, 30, and 35 mol % are investigated as functions of the irradiation dose and the heat treatment time. The spectra are decomposed into Gaussian components with the use of computer processing. It is revealed that the glass composition and the irradiation dose affect the number, type, and parameters of the bands associated with the PO 4 2− hole-type centers, electron-type color centers of the phosphate matrix, [Nb(5+)−] one-electron centers, and [Nb(5+)−-O-Nb(5+)−] two-electron centers. The inference is made that heat treatment at temperatures close to the glass transition point T g leads to the formation of groupings with a structure similar to structural motifs of NaNbO3 crystals. It is demonstrated that these groupings are responsible for the induced optical absorption in the near-IR spectral range. Pleiades Publishing, Inc., 2006 Avdeeva E. St. Petersburg State Polytechnical University, Politekhnicheskaya ul. 29, 195251, St. Petersburg, Russia aut Bocharova T. St. Petersburg State Polytechnical University, Politekhnicheskaya ul. 29, 195251, St. Petersburg, Russia aut Karapetyan G. St. Petersburg State Polytechnical University, Politekhnicheskaya ul. 29, 195251, St. Petersburg, Russia aut Mironov A. St. Petersburg State Polytechnical University, Politekhnicheskaya ul. 29, 195251, St. Petersburg, Russia aut Glass Physics and Chemistry Nauka/Interperiodica 32/2(2006-03-01), 153-161 1087-6596 32:2<153 2006 32 10720 https://doi.org/10.1134/S1087659606020052 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1087659606020052 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Avdeeva E. St. Petersburg State Polytechnical University, Politekhnicheskaya ul. 29, 195251, St. Petersburg, Russia aut NATIONALLICENCE 700 1- Bocharova T. St. Petersburg State Polytechnical University, Politekhnicheskaya ul. 29, 195251, St. Petersburg, Russia aut NATIONALLICENCE 700 1- Karapetyan G. St. Petersburg State Polytechnical University, Politekhnicheskaya ul. 29, 195251, St. Petersburg, Russia aut NATIONALLICENCE 700 1- Mironov A. St. Petersburg State Polytechnical University, Politekhnicheskaya ul. 29, 195251, St. Petersburg, Russia aut NATIONALLICENCE 773 0- Glass Physics and Chemistry Nauka/Interperiodica 32/2(2006-03-01), 153-161 1087-6596 32:2<153 2006 32 10720 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer