کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9845929 | 1526522 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optical properties of pristine and γ-irradiated Sm doped borosilicate glasses
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
ابزار دقیق
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Optical properties of pristine and γ-irradiated Sm doped borosilicate glasses Optical properties of pristine and γ-irradiated Sm doped borosilicate glasses](/preview/png/9845929.png)
چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 537, Issues 1â2, 21 January 2005, Pages 411-414
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 537, Issues 1â2, 21 January 2005, Pages 411-414
نویسندگان
Eugenia Malchukova, Bruno Boizot, Dominique Ghaleb, Guillaume Petite,