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Autori: C. Ivascu, I.B. Cozar, L. Daraban, G. Damian
Editorial: Elsevier , Journal of Non-Crystalline Solids, 359, p.60-64, 2013.
A systematic IR, Raman and ESR study of the P2O5-CdO-Li2O glass system–a possible dosimeter material, is reported. The proportion of P2O5 remains constant at 0.5 mol% and those of CdO and Li2O are changed from 0 to 0.5 mol%. IR and Raman spectra allowed us to identify the structural units which appear in the structural network of these phosphate glasses and also the network modifier role of Cd2+ and Li+ ions. Generally, a local network structure mainly based on Q2 and Q3 tetrahedrons connected by P-O-P linkages is revealed. ESR spectra of gamma irradiated sample with a 60Co gamma source, are characterized by the hyperfine doublet of 31P isotope (I=1/2) and a linear dependence of the ESR signal intensity versus the absorbed doses in the range of 100-3500 Gy was obtained. This fact proves that the investigated glass system could be successfully used as ESR dosimeter in medicine and industry.
Cuvinte cheie: P2O5-CdO-Li2O glasses; IR; Raman; ESR