标题： 双MSB的荧光量子产率的测量 显示英文标题

标题： Measurement of the fluorescence quantum yield of bis-MSB

摘要： 双MSB的荧光量子产率被测量，以研究液态闪烁体中的光子吸收和再发射过程。再发射过程影响光电子产率和分布，尤其是在大型液态闪烁体探测器中，因此必须了解以优化液态闪烁体以获得良好的能量分辨率，并通过蒙特卡罗方法精确模拟探测器。在本研究中，制备了不同双MSB浓度的溶液进行吸收和荧光发射测量，以覆盖广泛的波长范围。Harmane被用作标准参考以获得绝对荧光量子产率。首次测量了双MSB在蒙特卡罗模拟所需的430 nm处的荧光量子产率，其值为0.926$\pm$0.053，在$\lambda_{\rm ex}$= 350 nm时。 显示英文摘要

摘要： 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 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$\pm$0.053 at $\lambda_{\rm ex}$ = 350 nm.