Yue Li , Yongqiang Zhang , Guoqiang Zhong , Wenjing Pu , Wei Lu , Weihua Wang
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引用次数: 0
Abstract
Liquid scintillator consists of an organic solvent and one or more scintillation solutes, which can emit light pulses after absorbing X- and γ-rays, or high-energy particles. It has the characteristics of strong neutron/γ-ray (n/γ) discrimination, short decay time, unlimited size and low cost, which plays an important role in high-sensitivity and large-scale radiation detection, especially in the construction and safe operation of nuclear facilities. However, the impact of solvent selection and moisture content on the fluorescence-scintillation properties of scintillators has not been adequately investigated in the literature. In this study, liquid scintillators consisting of scintillation solutes, 2, 5-diphenyl-oxazole and 1, 4-bis (5-phenyl-2-oxazolyl) benzene, were prepared with different moisture contents, which were determined using the Karl-Fischer method. The fluorescence emission spectra, scintillation sensitivity and n/γ discrimination were systematically characterized using various solvents with corresponding moisture contents. The results show that the scintillation count rate and n/γ discrimination reach their maximum values when employing p-xylene as the solvent and maintaining moisture content below 20 ppm. The theoretical calculation elucidates the performance degradation of liquid scintillators induced by moisture.
期刊介绍：
Applied Radiation and Isotopes provides a high quality medium for the publication of substantial, original and scientific and technological papers on the development and peaceful application of nuclear, radiation and radionuclide techniques in chemistry, physics, biochemistry, biology, medicine, security, engineering and in the earth, planetary and environmental sciences, all including dosimetry. Nuclear techniques are defined in the broadest sense and both experimental and theoretical papers are welcome. They include the development and use of α- and β-particles, X-rays and γ-rays, neutrons and other nuclear particles and radiations from all sources, including radionuclides, synchrotron sources, cyclotrons and reactors and from the natural environment.
The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria.
Papers dealing with radiation processing, i.e., where radiation is used to bring about a biological, chemical or physical change in a material, should be directed to our sister journal Radiation Physics and Chemistry.
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