液体闪烁体光电子产额的测量
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摘要
液体闪烁体在中微子实验中被广泛使用,高光产额的液体闪烁体可以使实验获得更好的能量分辨率,尤其是对于大体积的液体闪烁体探测器,如江门中微子实验.对于多种成分组成的液体闪烁体,通过优化各个组分的浓度配比,可以获得更高的光产额.实验利用康普顿散射方法对不同浓度配比的液体闪烁体的绝对光电子产额进行了准确的测量.这为进一步确定液体闪烁体的初始绝对光产额以及为不同尺寸的探测器选择最优的液体闪烁体的组分配比提供了实验基础.
Liquid scintillator is wildly used in neutrino experiments. High light yield can make the experiment have good energy resolution, especially for large size detectors, such as the Jiangmen Underground Neutrino Observatory(JUNO). For multicomponent liquid scintillator, the light yield becomes higher by optimizing the concentration of each component. The absolute values of photoelectron yield for different liquid scintillator samples was measured by Compton scattering method. The results give experimental support to get the initial absolute value of light yield and optimize the liquid scintillator components for different size detectors.
Liquid scintillator is wildly used in neutrino experiments. High light yield can make the experiment have good energy resolution, especially for large size detectors, such as the Jiangmen Underground Neutrino Observatory(JUNO). For multicomponent liquid scintillator, the light yield becomes higher by optimizing the concentration of each component. The absolute values of photoelectron yield for different liquid scintillator samples was measured by Compton scattering method. The results give experimental support to get the initial absolute value of light yield and optimize the liquid scintillator components for different size detectors.
引文
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2 Alimonti M G, Gandolfo P L, Lombardi P, et al. The scintillator solvent procurement for the Borexino solar neutrino detector[J]. Nucl Instrum Meth A, 2011, 648:100-108.
3 Carr R, Lutch S, Novella P, et al. New results from the Double Chooz experiment[J]. Nucl Part Phys Proc,2016, 2 648:273-275.
4 An F P, An Q, Bai J Z, et al. Improved measurement of electron antineutrino disappearance at Daya Bay[J].Chin Phys C, 2013, 37(1):011 001.
5 Ding Xuefeng, Wen Liangjian, Zhou xiang, et al. Measurement of the fluorescence quantum yield of bis-MSB[J]. Chin Phys C, 2015, 39(12):126 001.
6 Xiao Hualin, Li Xiaobo, Zheng dong, et al. Study of absorption and re-emission processes in a ternary liquid scintillation system[J]. Chin Phys. C, 2010, 34(11):1 724-1 728.
7 Birks J B. The theory and practice of scintillation counting[M]. New York:Macmillan, 1964.
8 Ye Xingchen, Yu Boxiang, Zhou xiang, et al. Preliminary study of light yield dependence on LAB liquid scintillator composition[J]. Chin Phys C, 2015, 39(9):096 003.
9 孟祥承,杨长根,王志民,等.光电倍增管的光电子幅度谱测试研究[J].核电子学与探测技术,2005, 25(6):594-600.
10 Xiao Hualin, Deng Jingshan, Wang Naiyan. Oxygen quenching in a LAB based liquid scintillator and the nitrogen bubbling model[J]. Chin Phys C, 2010,34(5):571-575.
11 Bellamy E H, Bellettini G, Budagov J, et al. Absolute calibration and monitoring of a spectrometric channel using a photomultiplier[J]. Nucl Instrum Meth A, 1994, 339:468-476.