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<p>In this study, we report the development of a scintillator used for neutron/gamma discrimination, which consists of a polyvinyltoluene matrix loaded with monomers of 2,4-diphenyl-1,3,2-dioxasilolane&#xa0;(DDS) and fluor dyes, namely 2,5-diphenyloxazole and 7-diethylamino-4-methylcoumarin, as the primary fluorophore and wavelength shifter, respectively. DDS is an organosilicon compound containing double benzene rings that facilitate fluorescence emission and radiation resistance. Several measurements were performed to explore the optical and detection properties of the scintillators, including <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(^{238}\)</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>238</mn> </mmultiscripts> </math></EquationSource> </InlineEquation>Pu-Be neutron radiation tests and relative light yield measurements using a <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(^{137}\)</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>137</mn> </mmultiscripts> </math></EquationSource> </InlineEquation>Cs gamma-ray source. The results indicate that the synthesized plastic scintillators can effectively discriminate between neutrons and gamma rays. They exhibit a light output comparable to that of a commercial scintillator (EJ-200). The scintillators are inexpensive, productive, highly transparent, and somewhat soft but sufficiently hard for post-production processing (machine cutting and polishing). This design may contribute to a new strategy for highly efficient neutron/gamma discrimination in organic scintillators.</p>

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An organosilicon-loaded plastic scintillator synthesized for neutron/gamma discrimination

  • 期刊论文

  • 发表日期：

    2026年5月19日

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  • Wei-Rong Liu,
  • Peng-Cheng Shi,
  • Ying-Du Liu,
  • Zhi-Yun Zhu,
  • Si-Yu Zhang,
  • Jie Bao

摘要

In this study, we report the development of a scintillator used for neutron/gamma discrimination, which consists of a polyvinyltoluene matrix loaded with monomers of 2,4-diphenyl-1,3,2-dioxasilolane (DDS) and fluor dyes, namely 2,5-diphenyloxazole and 7-diethylamino-4-methylcoumarin, as the primary fluorophore and wavelength shifter, respectively. DDS is an organosilicon compound containing double benzene rings that facilitate fluorescence emission and radiation resistance. Several measurements were performed to explore the optical and detection properties of the scintillators, including \(^{238}\) 238 Pu-Be neutron radiation tests and relative light yield measurements using a \(^{137}\) 137 Cs gamma-ray source. The results indicate that the synthesized plastic scintillators can effectively discriminate between neutrons and gamma rays. They exhibit a light output comparable to that of a commercial scintillator (EJ-200). The scintillators are inexpensive, productive, highly transparent, and somewhat soft but sufficiently hard for post-production processing (machine cutting and polishing). This design may contribute to a new strategy for highly efficient neutron/gamma discrimination in organic scintillators.