论文标题
测量液体闪烁体检测器的瑞利散射长度的光谱方法
A Spectrometric Approach to Measuring the Rayleigh Scattering Length for Liquid Scintillator Detectors
论文作者
论文摘要
良好的光学透明度是液体闪烁体（LS）检测器的基本要求。表征液体闪烁体对其自身发射光的透明度是确定大容量检测器的整体灵敏度的关键参数。光学LS中光的衰减主要由瑞利散射，这对LS的透明度构成了内在的极限。这项工作提出了一种测量液体波长散射长度的光谱方法，该方法通过将爱因斯坦 - 莫洛克霍夫斯基理论应用于散射光强度的测量中。测量了线性烷基苯（LAB）和EJ309碱基（Di-异丙基苯丙烯，DIN）的散射长度，并在410至520 nm的波长范围内进行了报道。标称LS发出的闪烁光的光谱峰约为430 nm，在该频谱中，实验室和EJ-309碱基的散射长度分别为27.9 +/- 2.3 m和6.1 +/- 0.6 m。
Good optical transparency is a fundamental requirement of liquid scintillator (LS) detectors. Characterizing the transparency of a liquid scintillator to its own emitted light is a key parameter to determine the overall sensitivity of a large-volume detector. The attenuation of light in an optical-pure LS is dominated by Rayleigh scattering, which poses an intrinsic limit to the transparency of LS. This work presents a spectrometric approach of measuring the wavelength-dependent scattering length of liquids by applying the Einstein-Smoluchowski theory to a measurement of scattered light intensity. The scattering lengths of linear alkyl benzene (LAB) and EJ309-base (Di-isopropylnaphthalene, DIN) were measured and are reported in the wavelength range of 410 to 520 nm. The spectral peak of scintillation light emitted by a nominal LS is around 430 nm at which the scattering length for LAB and EJ-309-base was determined to be 27.9 +/- 2.3 m and 6.1 +/- 0.6 m respectively.
