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8484384 
Journal Article 
FT-IR, Raman and thermoluminescence investigation of P2O5-BaO-Li2O glass system 
Ivascu, C; Gabor, AT; Cozar, O; Daraban, L; Ardelean, I; , 
2011 
Yes 
Journal of Molecular Structure
ISSN: 0022-2860
EISSN: 1872-8014 
ELSEVIER 
AMSTERDAM 
249-253 
WOS:000291066000039 
The 0.5P(2)O(5)center dot xBaO center dot(0.5-x) Li2O glass system (0 <= x <= 0.5 mol%) is investigated by FT-IR, Raman and thermoluminescence as a possible dosimetic material. FT-IR and Raman spectra show structural network modifications with the composition variations of the studied glasses. The predominant absorption band from IR spectra is attributed to the symmetric stretching vibrations of P = O double bonds. Raman spectra of the studied glasses contain also typical phosphate glasses bands. Thus the band at similar to 700 cm(-1) is assigned to symmetric stretching vibrations of P-O-P groups and that from similar to 1158 cm(-1) is attributed to symmetric stretching motions of the non-bridging oxygen (NBO) atoms bonded to phosphorous atoms (PO2) in phosphate tetrahedron. Finally FT-IR and Raman spectroscopies revealed a local network structure mainly based on Q(2) and Q(3) tetrahedrons connected by P-O-P linkages. Luminescence investigations show that by adding modifier oxides to phosphate glass dose dependent TL signals result upon irradiation. Thus P2O5-BaO-Li2O glass system is a possible candidate material for dosimetry in the high dose range (>10 Gy). (C) 2010 Elsevier B.V. All rights reserved. 
30th European Congress on Molecular Spectroscopy 
Florence, ITALY