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arXiv 2107.05752physics.ins-det
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有机物scintillator对碳和质子反冲响应的同时测量

Simultaneous measurement of organic scintillator response to carbon and proton recoils

T. A. Laplace, B. L. Goldblum, J. J. Manfredi, J. A. Brown, D. L. Bleuel, C. A. Brand, G. Gabella, J. Gordon, E. Brubaker

摘要:

背景:有机闪烁体在基础核物理和应用中广泛用于中子探测。虽然质子光产额的有机发光剂已被广泛研究,从中子与碳核相互作用的光产额的测量是稀缺的。目的:提出一种同时测量有机光催化剂质子和碳光产额的新方法。为EJ-309液体和EJ-204塑料有机蒸发器提供新的碳光产率数据。方法:用劳伦斯伯克利国家实验室88英寸回旋加速器上的33 MeV $^{2}$ H $^{+}$束轰击3 mm厚的Be靶,产生高通量、宽谱中子束。将双飞行时间技术扩展到同时测量有机光催化剂的质子和碳光产额,其中使用$np$和$n$ C弹性散射运动学确定与反冲粒子相关的光输出。结果如下:测量了EJ-309液体和EJ-204塑料有机光催化剂的质子和碳光产额关系,EJ-309的反冲能分别为0.3 ~ 1 MeV和2 ~ 5 MeV,EJ-204的反冲能分别为0.2 ~ 0.5 MeV和1 ~ 4 MeV。结论:这些数据提供了新的见解的电离猝灭效应的有机制冷剂和关键输入的有机制冷剂的响应模拟基础科学和广泛的应用。

英文摘要:

Background: Organic scintillators are widely used for neutron detection in both basic nuclear physics and applications. While the proton light yield of organic scintillators has been extensively studied, measurements of the light yield from neutron interactions with carbon nuclei are scarce. Purpose: Demonstrate a new approach for the simultaneous measurement of the proton and carbon light yield of organic scintillators. Provide new carbon light yield data for the EJ-309 liquid and EJ-204 plastic organic scintillators. Method: A 33~MeV $^{2}$H$^{+}$ beam from the 88-Inch Cyclotron at Lawrence Berkeley National Laboratory was impinged upon a 3-mm-thick Be target to produce a high-flux, broad-spectrum neutron beam. The double time-of-flight technique was extended to simultaneously measure the proton and carbon light yield of the organic scintillators, wherein the light output associated with the recoil particle was determined using $np$ and $n$C elastic scattering kinematics. Results: The proton and carbon light yield relations of the EJ-309 liquid and EJ-204 plastic organic scintillators were measured over a recoil energy range of approximately 0.3 to 1~MeV and 2 to 5~MeV, respectively for EJ-309, and 0.2 to 0.5~MeV and 1 to 4~MeV, respectively for EJ-204. Conclusions: These data provide new insight into the ionization quenching effect in organic scintillators and key input for simulation of the response of organic scintillators for both basic science and a broad range of applications.

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