The weighting function of a neutron capture detection system
The weighting function of a neutron capture detection system
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中子俘获探测系统的加权函数
DOI：
10.13182/nse91-a23790
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
P. Smith
中科院分区：
文献类型：
--
作者：
F. Corvi;G. Fioni;F. Gasperini;P. Smith
本文报道了18个伽马射线在02范围内的一组效率和响应函数。通过中子俘获探测装置的(p，{Gamma})符合方法实验确定的至8.4 MeV。它由两个柱状的氢化六苯(C{sub6}D{sub6})液体闪烁体组成，相对于束流对称且垂直放置，并以和模式工作。由该数据集导出了脉冲高度加权函数，并用于测量{sup 56}Fe的1.5keV共振中子俘获相对于{sup 109}Ag的5.2 eV共振俘获的中子俘获。测得中子宽度为{Gamma}{subitaln}=62.9{正负}2.1 meV，与透射率测量的{Gamma}{subitaln}=61.7{正负]0.9 meV符合得很好。讨论了该加权函数对不同厚度、不同成分的样品的适用范围。
This paper reports on a set of efficiencies and response functions for 18 gamma rays in the range from 02. to 8.4 MeV experimentally determined via a (p,{gamma}) coincidence method for a neutron capture detection setup. This consists of two cylindrical deuterated hexabenzene (C{sub 6}D{sub 6}) liquid scintillators placed symmetrically and normally with respect to the beam and operated in sum mode. A pulse-height weighing function is derived from this data set and applied to the measurement of neutron capture in the 1.5-keV resonance of {sup 56}Fe relative to capture in the 5.2-eV resonance of {sup 109}Ag. A value of {Gamma}{sub {ital n}} = 62.9 {plus minus} 2.1 meV has been obtained for the neutron width, in good agreement with the value of {Gamma}{sub {ital n}} = 61.7 {plus minus} 0.9 meV from transmission measurements. The extension of the validity of this weighing function to samples of different thickness and composition is discussed.