کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5403202 | 1392753 | 2007 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Color centers in neutron-irradiated Y3Al5O12, CAF2 and LiF single crystals
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Color centers in neutron-irradiated Y3Al5O12, CAF2 and LiF single crystals Color centers in neutron-irradiated Y3Al5O12, CAF2 and LiF single crystals](/preview/png/5403202.png)
چکیده انگلیسی
The thermal annealing behavior of the Y3Al5O12, CaF2 and LiF single crystals bombarded at Algiers with reactor neutrons has been monitored by optical absorption spectroscopy. The irradiation was performed at about 315 K. On heating samples after irradiation, the optical absorption bands decrease and disappear completely at 873 and 523 K in the case of Y3Al5O12 and CaF2, respectively. Activation energies of 1.2±0.02 and 0.9±0.2 eV are estimated for Y3Al5O12 and CaF2, respectively. On the other hand, the LiF crystal shows a complex annealing behavior. Here, the optical absorption spectrum presents different shapes after each annealing temperature. Four steps are distinguished and discussed on heating samples from 300 to 673 K. Above 673 K, the absorption drops by about 50%; it completely disappears at 773 K.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 127, Issue 2, December 2007, Pages 696-702
Journal: Journal of Luminescence - Volume 127, Issue 2, December 2007, Pages 696-702
نویسندگان
M. Izerrouken, A. Meftah, M. Nekkab,