Gamma-ray spectra from thermal neutron capture on gadolinium-155 and natural gadolinium
Gamma-ray spectra from thermal neutron capture on gadolinium-155 and natural gadolinium
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DOI：
10.1093/ptep/ptaa015
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发表时间：
2020-04-01
影响因子：
3.5
通讯作者：
Yano, Takatomi
中科院分区：
文献类型：
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作者：
Tanaka, Tomoyuki;Hagiwara, Kaito;Yano, Takatomi
天然钆由于其两种主要的同位素Gd-155和Gd-157而具有良好的热中子俘获截面，因此被广泛应用。我们测量的伽马射线谱产生的热中子捕获的目标，包括天然钆膜和富集Gd-155（在Gd 2 O3粉末）的能量范围从0.11 MeV到8.0 MeV，使用ANNRI锗谱仪在MLF，J-PARC。本文用新分析的Gd-155（n，γ）反应数据改进了我们以前建立的Gd-157（n，γ）反应模型（ANNRI-Gd模型）[K. Hagiwara等人[ANNRI-Gd协作]，Prog. Theor. Exp. Phys. 2019，023 D 01（2019）]，其性能得到了来自Gd-nat（n，γ）反应的独立数据的证实。本文完成了一个有效的蒙特卡罗模型的开发，需要模拟和分析粒子相互作用，涉及热中子捕获钆在任何相关的未来实验。
Natural gadolinium is widely used for its excellent thermal neutron capture cross section, because of its two major isotopes: Gd-155 and Gd-157. We measured the gamma-ray spectra produced from the thermal neutron capture on targets comprising a natural gadolinium film and enriched Gd-155 (in Gd2O3 powder) in the energy range from 0.11 MeV to 8.0 MeV, using the ANNRI germanium spectrometer at MLF, J-PARC. The freshly analyzed data of the Gd-155(n,gamma) reaction are used to improve our previously developed model (ANNRI-Gd model) for the Gd-157(n,gamma) reaction [K. Hagiwara et al. [ANNRI-Gd Collaboration], Prog. Theor. Exp. Phys. 2019, 023D01 (2019)], and its performance confirmed with the independent data from the Gd-nat(n,gamma) reaction. This article completes the development of an efficient Monte Carlo model required to simulate and analyze particle interactions involving the thermal neutron captures on gadolinium in any relevant future experiments.