کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10715847 | 1027374 | 2018 | 21 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A new neutron detector designed for (n,2n) and (n,3n) reaction cross section measurements
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
ابزار دقیق
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A large 4Ï liquid scintillator was commonly used as the neutron detector to measure nucleus (n,2n) and (n,3n) reaction cross sections in the past direct neutron counting method. However, this type of detector was often criticized for its high γ-rays background. Hence we constructed a new 4Ï3He array detector to substitute the large liquid scintillation detector, which can effectively suppress the γ-rays. This work mainly studies the detection efficiency and moderation time of this new detector through experimental and simulational methods. Due to its spherical configuration, a relatively stable and weak angular dependence detection efficiency is obtained for the secondary neutrons from (n,2n) and (n,3n) reactions. In addition, the character that the moderation time is nearly independent of neutron energy guarantees gate width has a same influence on the detection efficiency of the secondary neutrons from different samples. These features make it a good candidate detector for (n,2n) and (n,3n) reaction cross section measurements. At last, the preliminary experiment plan and the corresponding calculation method are briefly described.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 910, 1 December 2018, Pages 157-163
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 910, 1 December 2018, Pages 157-163
نویسندگان
Jianqi Chen, Xiongjun Chen, Xichao Ruan, Weixiang Yu, Jie Ren, Liyang Jiang,