کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1589581 | 1002001 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Verifying the presence of low levels of neptunium in a uranium matrix with electron energy-loss spectroscopy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This paper examines the problems associated with analysis of low levels of neptunium in a uranium matrix with electron energy-loss spectroscopy (EELS) on the transmission electron microscope (TEM). The detection of neptunium in a matrix of uranium can be impeded by the occurrence of a plural scattering event from uranium (U-M5Â +Â U-O4,5) that results in severe overlap on the Np-M5 edge at 3665Â eV. Low levels of Np (1600-6300Â ppm) can be detected in a uranium solid, uranophane [Ca(UO2)2(SiO3OH)2(H2O)5], by confirming that the energy gap between the Np-M5 and Np-M4 edges is at 184Â eV and showing that the M4/M5 ratio for the neptunium is smaller than that for uranium. The Richardson-Lucy deconvolution method was applied to energy-loss spectral images and was shown to increase the signal to noise ratio.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Micron - Volume 41, Issue 1, January 2010, Pages 65-70
Journal: Micron - Volume 41, Issue 1, January 2010, Pages 65-70
نویسندگان
Edgar C. Buck, Matt Douglas, Rick S. Wittman,