کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10730530 1042558 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental re-evaluation of the γ-ray energy and emission probability for the 159 keV transition in 238U following the α-decay of 242Pu
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم تشعشع
پیش نمایش صفحه اول مقاله
Experimental re-evaluation of the γ-ray energy and emission probability for the 159 keV transition in 238U following the α-decay of 242Pu
چکیده انگلیسی
Because of the very low specific activity of 242Pu, the non-destructive assay of this isotope by means of conventional high-resolution gamma-spectrometry (HRGS) is possible only for Pu samples highly rich in 242Pu. For bulk samples suffering from the gamma self-attenuation and self-fluorescence effects, the only practical choice for the quantitative analysis of 242Pu is the weak γ-line emitted in the 159 keV transition of its α-decay daughter 238U. A recent study revealed a significant disagreement between the 242Pu mass values in a 99.72% enriched 242PuO2 sample as reported by HRGS and neutron coincidence counting. This fact motivated the present study on the experimental re-evaluation of the γ-emission probability for the 159 keV transition using a combination of α-, γ- and mass-spectrometry techniques. The obtained new emission probability P2=(2.20±0.08)10−6 turned out to be ≈35% smaller than the currently adopted value. The study also suggested a new value E2=159.018±0.016 keV for the energy of the respective γ-ray.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Radiation and Isotopes - Volume 69, Issue 2, February 2011, Pages 531-538
نویسندگان
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