Luminescence and vibrational spectroscopies were used to characterize Gd-enriched phosphate glasses. In particular, the emission spectrum shows, besides the characteristic 3.98 eV band, an additional band at 3.83 eV, assigned to a vibronic transition. To further support this assignment, Raman spectroscopy measurements were carried out to examine the vibrational response of these glasses. A symmetric stretching of a non-bridging oxygen on a Q 2 tetrahedron (PO2) was detected at 1190 cm-1, close to the energy separation between the maxima of 3.98 eV and 3.83 eV bands in the emission spectrum. The emission band at 3.83 eV in Gd-enriched phosphate glasses could be thus intepreted as a vibronic band of the 3.98 eV emission of Gd3+ due to interaction with the (PO2) stretching mode.
DI MARTINO, D., Krasnikov, A., Nikl, M., Nitsch, K., Vedda, A., Zazubovich, S. (2004). The 3.83 eV luminescence of Gd-enriched phosphate glasses. PHYSICA STATUS SOLIDI. A, APPLIED RESEARCH, 201(7), R38-R40 [10.1002/pssa.200409038].
The 3.83 eV luminescence of Gd-enriched phosphate glasses
DI MARTINO, DANIELA;VEDDA, ANNA GRAZIELLA;
2004
Abstract
Luminescence and vibrational spectroscopies were used to characterize Gd-enriched phosphate glasses. In particular, the emission spectrum shows, besides the characteristic 3.98 eV band, an additional band at 3.83 eV, assigned to a vibronic transition. To further support this assignment, Raman spectroscopy measurements were carried out to examine the vibrational response of these glasses. A symmetric stretching of a non-bridging oxygen on a Q 2 tetrahedron (PO2) was detected at 1190 cm-1, close to the energy separation between the maxima of 3.98 eV and 3.83 eV bands in the emission spectrum. The emission band at 3.83 eV in Gd-enriched phosphate glasses could be thus intepreted as a vibronic band of the 3.98 eV emission of Gd3+ due to interaction with the (PO2) stretching mode.
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