Slow fluors for effective separation of Cherenkov light in liquid scintillators
Slow fluors for effective separation of Cherenkov light in liquid scintillators
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DOI：
10.1016/j.nima.2020.164106
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发表时间：
2020-08-21
影响因子：
1.4
通讯作者：
Paton, Josephine L.
中科院分区：
文献类型：
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作者：
Biller, Steven D.;Leming, Edward J.;Paton, Josephine L.
以线性烷基苯（LAB）为主要溶剂，研究了四种高效慢速荧光剂在液体闪烁溶液中的计时和光谱特性。该混合物具有较高的光产率，但上升时间为几ns或更多，衰减时间为数十ns。因此，这种液体闪烁体混合物可用于大型液体闪烁探测器中基于定时的切伦科夫和闪烁组分的有效分离。这种分离，显示出高光产率和方向信息，在台式尺度上证明了能量延伸到1兆电子伏以下的电子。这可能会对未来此类探测器的发展产生重大影响，用于测量太阳中微子和无中微子双β衰变（0 nu β β），以及为超新星中微子和反应堆反中微子等的弹性散射事件提供良好的方向信息。
The timing and spectral characteristics of four highly efficient, slow fluors are presented for liquid scintillator solutions using linear alkylbenzene (LAB) as the primary solvent. The mixtures exhibit high light yields, but with rise times of several ns or more and decay times on the order of tens of ns. Consequently, such liquid scintillator mixtures can be used for effective separation of Cherenkov and scintillation components based on timing in large scale liquid scintillation detectors. Such a separation, showing high light yield and directional information, is demonstrated here on a bench-top scale for electrons with energies extending below 1 MeV. This could have significant consequences for the future development of such detectors for measurements of solar neutrinos and neutrinoless double beta decay (0 nu beta beta) as well as providing good directional information for elastic scattering events from supernovae neutrinos and reactor anti-neutrinos, amongst others.