کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1166264 1491111 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fission track–secondary ion mass spectrometry as a tool for detecting the isotopic signature of individual uranium containing particles
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Fission track–secondary ion mass spectrometry as a tool for detecting the isotopic signature of individual uranium containing particles
چکیده انگلیسی

A fission track technique was used as a sample preparation method for subsequent isotope abundance ratio analysis of individual uranium containing particles with secondary ion mass spectrometry (SIMS) to measure the particles with higher enriched uranium efficiently. A polycarbonate film containing particles was irradiated with thermal neutrons and etched with 6 M NaOH solution. Each uranium containing particle was then identified by observing fission tracks created and a portion of the film having a uranium containing particle was cut out and put onto a glassy carbon planchet. The polycarbonate film, which gave the increases of background signals on the uranium mass region in SIMS analysis, was removed by plasma ashing with 200 W for 20 min. In the analysis of swipe samples having particles containing natural (NBL CRM 950a) or low enriched uranium (NBL CRM U100) with the fission track–SIMS method, uranium isotope abundance ratios were successfully determined. This method was then applied to the analysis of a real inspection swipe sample taken at a nuclear facility. As a consequence, the range of 235U/238U isotope abundance ratio between 0.0276 and 0.0438 was obtained, which was higher than that measured by SIMS without using a fission track technique (0.0225 and 0.0341). This indicates that the fission track–SIMS method is a powerful tool to identify the particle with higher enriched uranium in environmental samples efficiently.

Figure optionsDownload as PowerPoint slideHighlights
► A fission track technique is combined with secondary ion mass spectrometry.
► Plasma ashing is used to prepare samples for analysis.
► The particles with higher enriched uranium are identified efficiently.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytica Chimica Acta - Volume 721, 6 April 2012, Pages 122–128
نویسندگان
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