Measurement of the fluorescence quantum yield of bis-MSB

The fluorescence quantum yield of bis-MSB, a widely used liquid scintillator wavelength shifter, was measured to study the photon absorption and re-emission processes in a liquid scintillator. The re-emission process affects the photoelectron yield and distribution, especially in a large liquid scin...

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Published inChinese physics C Vol. 39; no. 12; pp. 44 - 50
Main Author 丁雪峰 温良剑 周详 丁雅韵 叶星辰 周莉 刘梦超 蔡浩 曹俊
Format Journal Article
LanguageEnglish
Published 01.12.2015
Subjects
Computer simulation
Detectors
Fluorescence
Liquids
Monte Carlo methods
Photon absorption
Wavelengths
发射过程
波长变换器
测定
液体闪烁体
能量分辨率
荧光量子产率
闪烁体探测器
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ISSN1674-1137
0254-3052
DOI10.1088/1674-1137/39/12/126001

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Summary:The fluorescence quantum yield of bis-MSB, a widely used liquid scintillator wavelength shifter, was measured to study the photon absorption and re-emission processes in a liquid scintillator. The re-emission process affects the photoelectron yield and distribution, especially in a large liquid scintillator detector, thus must be under- stood to optimize the liquid scintillator for good energy resolution and to precisely simulate the detector with Monte Carlo. In this study, solutions of different bis-MSB concentration were prepared for absorption and fluorescence emission measurements to cover a broad range of wavelengths. Harmane was used as a standard reference to obtain the absolution fluorescence quantum yield. For the first time we measured the fluorescence quantum yield of bis-MSB up to 430 nm as inputs required by Monte Carlo simulation, which is 0.926±0.053 at ;λex=350 nm.
Bibliography:fluorescence quantum yield, bis-MSB, JUNO, liquid scintillator
11-5641/O4
DING XueFeng, WEN Liangdian,ZHOU Xiang, DING Ya-Yun, YE Xing-Chen, ZHOU LI, LIU Meng- Chao,CAI Hao, CAO Jun（ 1 Hubei Nuclear Solid Physics Key Laboratory, Key Laboratory of Artificial Micro- and Nano structures of Ministry of Education, and School of Physics and Technology, Wuhan University, Wuhan 430072, China 2 Institute of High Energy Physics~ Chinese Academy of Sciences, Beijing 100049, China）
The fluorescence quantum yield of bis-MSB, a widely used liquid scintillator wavelength shifter, was measured to study the photon absorption and re-emission processes in a liquid scintillator. The re-emission process affects the photoelectron yield and distribution, especially in a large liquid scintillator detector, thus must be under- stood to optimize the liquid scintillator for good energy resolution and to precisely simulate the detector with Monte Carlo. In this study, solutions of different bis-MSB concentration were prepared for absorption and fluorescence emission measurements to cover a broad range of wavelengths. Harmane was used as a standard reference to obtain the absolution fluorescence quantum yield. For the first time we measured the fluorescence quantum yield of bis-MSB up to 430 nm as inputs required by Monte Carlo simulation, which is 0.926±0.053 at ;λex=350 nm.
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ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/39/12/126001