Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9845929 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2005 | 4 Pages |
Abstract
The luminescence of pristine and γ-irradiated Sm3+ doped borosilicate glasses was studied as a function of Sm content. For these glass compositions, observed critical concentration for the appearance of luminescence quenching is less than 1 wt% of Sm2O3. The fluorescence spectra reveal that the reduction processes of Sm3+ to Sm2+ ions is accomplished in case of exposure glass composition to ionizing radiation like γ rays, while the Sm2+ ions are not present into the pristine samples. The luminescence intensity of Sm2+ ions is discussed in relation to the irradiation dose and magnification under micro Raman spectrometer. It is assumed that the divalent rare-earth ions are preferentially located in the bulk than near the surface of glass. Results on reduction of Sm3+ are also discussed in correlation with defects creation processes analysed by EPR spectroscopy.
Related Topics
Physical Sciences and Engineering
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Instrumentation
Authors
Eugenia Malchukova, Bruno Boizot, Dominique Ghaleb, Guillaume Petite,