Measurement of the fluorescence quantum yield of bis-MSB

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DING Xue-Feng, WEN Liang-Jian, ZHOU Xiang, DING Ya-Yun, YE Xing-Chen, ZHOU Li, LIU Meng-Chao, CAI Hao and CAO Jun. Measurement of the fluorescence quantum yield of bis-MSB[J]. Chinese Physics C, 2015, 39(12): 126001. doi: 10.1088/1674-1137/39/12/126001
DING Xue-Feng, WEN Liang-Jian, ZHOU Xiang, DING Ya-Yun, YE Xing-Chen, ZHOU Li, LIU Meng-Chao, CAI Hao and CAO Jun. Measurement of the fluorescence quantum yield of bis-MSB[J]. Chinese Physics C, 2015, 39(12): 126001.  doi: 10.1088/1674-1137/39/12/126001 shu
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Received: 2015-04-08
Revised: 2015-06-16
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    Supported by National Natural Science Foundation of China (11205183, 11225525, 11390381)

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Measurement of the fluorescence quantum yield of bis-MSB

    Corresponding author: DING Xue-Feng,
    Corresponding author: ZHOU Xiang,
    Corresponding author: YE Xing-Chen,
Fund Project:  Supported by National Natural Science Foundation of China (11205183, 11225525, 11390381)

Abstract: 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 understood 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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