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arXiv 2203.01147physics.ins-dethep-ex
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低能太阳中微子和无中微子双β衰变的慢荧光Scintillator

Slow-Fluor Scintillator for Low Energy Solar Neutrinos and Neutrinoless Double Beta Decay

Jack Dunger, Edward J. Leming, Steven D. Biller

摘要:

通过一系列的模拟研究,探讨了利用慢荧光液体闪烁器研究低能太阳中微子和无中微子双β衰变(0nbb)的可能性。假设的主要荧光的荧光模型具有类似于苊的特性,最近用来证明切伦科夫分离在1兆电子伏左右的能量。这里的结果表明,显着更好的定向重建在大型探测器比以前所建议的其他方法,允许更好地识别低能量的太阳中微子。这些研究表明,使用目前可用的光电倍增管,覆盖率仅为30%的探测器可以在几千吨年的曝光时间内测量CNO太阳中微子通量,精度超过10%(足以区分金属丰度模型)。在0nbb方面的研究表明,分离机制的基础上的角分布的能力是弱的,但拒绝太阳中微子背景与这样的技术可能会接近一个因素的10个端点能量接近2.5兆电子伏的角半球定义的太阳方向。

英文摘要:

The potential for using slow-fluor liquid scintillators to study low energy solar neutrinos and neutrinoless double beta decay (0nbb) is explored through a series of simulations. The fluorescence model assumed for the primary fluor has characteristics similar to acenaphthene, recently used to demonstrate Cherenkov separation at energies around 1 MeV. Results here indicate notably better directional reconstruction in large-scale detectors than has previously been suggested by other approaches, allowing better identification of low energy solar neutrinos. These studies indicate that a detector with as little as ~30% coverage using currently available photomultiplier tubes could be able to make a measurement of the CNO solar neutrino flux to a precision of better than 10% (enough to distinguish metallicity models) with a few kiloton-years of exposure. In terms of 0nbb studies here suggest that the ability to separate mechanisms based on angular distributions is weak, but that the rejection of solar neutrino backgrounds with such a technique might potentially approach a factor of 10 for endpoint energies near 2.5 MeV in the angular hemisphere defined by the solar direction.

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