کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1686007 | 1518757 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
New stabilized VK-type center in electron-irradiated sodium fluoride observed by electron paramagnetic resonance
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
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چکیده انگلیسی
Sodium fluoride crystals were bombarded with MeV electrons near room-temperature or at 21 K and their EPR spectra measured. While after RT-irradiation one observes the spectrum of the classical cubic F-center, the low-T irradiation introduces a new low-symmetry defect which transforms reversibly into the F-center above â200 K. We suggest for the new center a triplet VK-type defect stabilized during irradiation by the nearby created F-center. While the ordinary VK-center as observed after low-T X-ray and γ-irradiation vanishes at 200 K the present electron-induced defect is stable and reappears upon cooling; it is still discernible after anneals up to 200 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 266, Issues 12â13, June 2008, Pages 2754-2757
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 266, Issues 12â13, June 2008, Pages 2754-2757
نویسندگان
F. Beuneu, P. Vajda,