Optimization of composition of liquid organic scintillators for fast neutron spectrometry
Optimization of composition of liquid organic scintillators for fast neutron spectrometry
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DOI：
10.1016/j.nima.2021.165523
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发表时间：
2021-06-17
影响因子：
1.4
通讯作者：
Cvachovec, Frantisek
中科院分区：
文献类型：
--
作者：
Jansky, Jaroslav;Janda, Jiri;Cvachovec, Frantisek
液体有机闪烁体是测量中子辐射的重要材料。这项工作旨在开发和优化液体有机闪烁体的成分，使其可用于快中子能谱测定。由于中子辐射通常伴随着伽马射线辐射，因此这项工作的重点是伽马/n 辨别。结果表明，二异丙基萘混合异构体和 1-甲基萘具有良好的 γ/n 辨别能力。然后，改变发光体的浓度，结果表明，浓度高于 3 g/l 的 PYR 和 THIO 发光体的品质因数 FOM>1.27，分别高于 0.14 MeVee 和 0.17 MeVee 的能量阈值。
Liquid organic scintillators are important materials for measurements of neutron radiation. This work aims to develop and optimize the composition of liquid organic scintillators so they can be used for fast neutron spectrometry. As neutron radiation is usually accompanied with gamma ray radiation, this work is focused on gamma/n discrimination. It is shown that Di-iso-propylnaphthalene Mixed Isomers and 1-Methylnaphthalene are capable of good gamma/n discrimination. Afterwards, the concentration of luminophores is varied and it is shown that the PYR and THIO luminophores with concentrations above 3 g/l have Figure of Merit FOM>1.27 above the energy threshold of 0.14 MeVee and 0.17 MeVee, respectively.