Temperature dependence of the light yield of the LAB-based and mesitylene-based liquid scintillators

We studied the temperature dependence of the light yield of linear alkyl benzene （LAB）-based and mesitylene-based liquid scintillators. The light yield increases by 23% for both liquid scintillators when the temper- ature is lowered from 26 ℃ to -40 ℃, correcting for the temperature response of the...

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Bibliographic Details
Published in:Chinese physics C 2014-11, Vol.38 (11), p.29-33
Main Author: 夏冬梅 俞伯祥 李小波 孙希磊 丁雅韵 周莉 曹俊 胡为 叶星辰 陈海涛 丁雪峰 杜冰
Format: Article
Language:English
Subjects:
Detectors
Hierarchies
LAB
Liquids
Neutrinos
Photomultiplier tubes
Reactors
Temperature dependence
Underground
中微子实验
产量
光电倍增管
液体闪烁体
液体闪烁探测器
温度依赖性
甲苯基
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Summary:We studied the temperature dependence of the light yield of linear alkyl benzene （LAB）-based and mesitylene-based liquid scintillators. The light yield increases by 23% for both liquid scintillators when the temper- ature is lowered from 26 ℃ to -40 ℃, correcting for the temperature response of the photomultiplier tube. The measurements help to understand the energy response of liquid scintillator detectors. Especially, the next generation reactor neutrino experiments for neutrino mass hierarchy, such as the Jiangmen Underground Neutrino Observatory （JUNO）, require very high energy resolution. As no apparent degradation on the liquid scintillator transparency was observed, lowering the operation temperature of the detector to ～4 ℃ will increase the photoelectron yield of the detector by 13%, combining the light yield increase of the liquid scintillator and the quantum efficiency increase of the photomultiplier tubes.
ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/38/11/116001