کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1740690 1521766 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electron energy loss spectroscopy investigations through nano-ablated actinide dioxide samples
ترجمه فارسی عنوان
بررسی طیف سنجی از دست دادن انرژی الکترون از طریق نمونه های دی اکسید اکتینید نانوذرات
کلمات کلیدی
دی اکسید توریوم، دی اکسید نپتون میکروسکوپ الکترونی انتقال، طیف سنجی از دست دادن انرژی الکترون
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
چکیده انگلیسی


• Actinide dioxides lamella were produced by FIB.
• EEL spectra recorded for ThO2, and NpO2 as a function of the thickness.
• The O and P edges were recorded.
• ThO2 and NpO2 EEL spectra are compared with those of UO2.

Lamellas of actinide (Th, Np) dioxides (∼10 μm × ∼10 μm × ∼0.02–0.20 μm) were produced by focused ion beam for transmission electron microscopy and electron energy loss (EEL) spectroscopy examinations. These samples allow quantitative analysis of the EEL spectra recorded for ThO2, and NpO2 as a function of the thickness. The O and P edges were recorded over zero loss to 400 eV loss. ThO2 and NpO2 EEL spectra are compared with those reported earlier for UO2. The energy lost was studied through a range of thicknesses going from ∼20 to ∼200 nm. It was observed that the O and P edges are not thickness dependant as expected confirming the core loss nature of these edges. The edges allow reconstruction of the electronic transitions, the lowest energy loss edges for P transitions corresponds to P3 electron transitions (from 15 to 17 eV) from the 6p(2/3) level. Two next P1 and P2 edges are partially overlapping. The followed O edges are suggested to be a pre-peak and the O4,5 transitions. The edge analysis allows also better interpretation of the loss spectrum with identification of the plasmon peak of the core electron transition edges. The technique may be applied for identification of the actinide in fuels or waste forms.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Nuclear Energy - Volume 72, April 2014, Pages 96–100
نویسندگان
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