کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1822143 1526319 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization of a neutron–beta counting system with beta-delayed neutron emitters
ترجمه فارسی عنوان
تشخیص یک سیستم شمارش نوترون های نوترون با بمراتب ناپایدار
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم ابزار دقیق
چکیده انگلیسی

A new detection system for the measurement of beta-delayed neutron emission probabilities has been characterized using fission products with well known β-delayed neutron emission properties. The setup consists of BELEN-20, a 4π neutron counter with twenty 3He proportional tubes arranged inside a large polyethylene neutron moderator, a thin Si detector for β counting and a self-triggering digital data acquisition system. The use of delayed-neutron precursors with different neutron emission windows allowed the study of the effect of energy dependency on neutron, β and β–neutron rates. The observed effect is well reproduced by Monte Carlo simulations. The impact of this dependency on the accuracy of neutron emission probabilities is discussed. A new accurate value of the neutron emission probability for the important delayed-neutron precursor 137I was obtained, Pn=7.76(14)Pn=7.76(14)%.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 807, 21 January 2016, Pages 69–78
نویسندگان
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