Neutron spectroscopy by thermalization light yield measurement in a composite heterogeneous scintillator

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题名:	Neutron spectroscopy by thermalization light yield measurement in a composite heterogeneous scintillator
作者:	林明緯;Shi, T.;Nattress, J.;Mayer, M.;Lin, M.-W.;Jovanovic, I.
贡献者:	理學院物理學系
关键词:	6Li-doped scintillator;Capture-gated detection;EJ-290 scintillator;Fast neutron spectroscopy;Light yield measurement
日期:	2016-12-11
上传时间:	2026-04-23 12:31:02 (UTC+8)
出版者:	Elsevier;United States: Elsevier B.V
摘要:	摘要： An exothermic neutron capture reaction can be used to uniquely identify neutrons in particle detectors. With the use of a capture-gated coincidence technique, the sequence of scatter events that lead to neutron thermalization prior to the neutron capture can also be used to measure neutron energy. We report on the measurement of thermalization light yield via a time-of-flight technique in a polyvinyl toluene-based scintillator EJ-290 within a heterogeneous composite detector that also includes 6Li-doped glass scintillator. The thermalization light output exhibits a strong correlation with neutron energy because of the preference for near-complete energy deposition prior to the 6Li(n,t)4He neutron capture reaction. The nonproportionality of the light yield from nuclear recoils contributes to the observed broadening of the distribution of thermalization light output. The nonproportional dependence of the scintillation light output in the EJ-290 scintillator as a function of proton recoil energy has been characterized in the range of 0.3–14.1MeV via the Birks parametrization through a combination of time-of-flight measurement and previously conducted measurements with monoenergetic neutron sources. 出版者： United States: Elsevier B.V 出版日期： 2016-12-11 出處： Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 2016-12, Vol.839, p.86-91 版權： 2016 Elsevier B.V. 識別號： ISSN: 0168-9002 識別號： ISSN: 1872-9576 識別號： EISSN: 1872-9576 識別號： DOI: 10.1016/j.nima.2016.09.041
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