کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8209913 | 1532102 | 2015 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A new Am-Be PGNAA setup for element determination in aqueous solution
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
تشعشع
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A new prompt-gamma neutron activation analysis (PGNAA) setup has been designed for element determination in aqueous solution with a 300 mCi 241Am-Be neutron source and a 4Â in.Ã3Â in. (diameterÃheight) BGO detector, uncooled. A polyethylene cylindrical sample container approximately 40Â cm in outer radius and 80Â cm in height was used. To reduce the neutron dose in the detector, a block of 5Â cm thickness Li2CO3 was placed between the source and the detector for separation, but no gamma-blocker was used. By adjusting the position of the detector and optimizing the geometrical conditions of the setup, the element detection limit with a low activity neutron source was further improved. This methodology was checked by simulations with chlorine, mercury and cadmium determination and by experiments with chlorine determination in aqueous samples. The results show a good linear relationship between chlorine concentration and the count of its characteristic peak, and the detection limit of chlorine can reach 41.7Â mg/L with a collection time of 3600Â s for each spectrum. Additionally, a linear relationship was identified between mercury concentration and the count of its characteristic peak, but for cadmium, a non-linear relationship was observed in the simulations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Radiation and Isotopes - Volume 95, January 2015, Pages 233-238
Journal: Applied Radiation and Isotopes - Volume 95, January 2015, Pages 233-238
نویسندگان
Ling Yongsheng, Jia Wenbao, Hei Daqian, Shan Qing, Cheng Can, Zhang Haojia, Hou Wenyu, He Yanquan, Chen Da,