Development of a Bi-solvent Liquid Scintillator with Slow Light Emission
arxiv(2024)
Abstract
One of the most promising approaches for the next generation of neutrino
experiments is the realization of large hybrid Cherenkov/scintillation
detectors made possible by recent innovations in photodetection technology and
liquid scintillator chemistry. The development of a potentially suitable future
detector liquid with particularly slow light emission is discussed in the
present publication. This cocktail is compared with respect to its fundamental
characteristics (scintillation efficiency, transparency, and time profile of
light emission) with liquid scintillators currently used in large-scale
neutrino detectors. In addition, the optimization of the admixture of
wavelength shifters for a scintillator with particularly high light emission is
presented. Furthermore, the pulse-shape discrimination capabilities of the
novel medium was studied using a pulsed particle accelerator driven neutron
source. Beyond that, purification methods based on column chromatography and
fractional vacuum distillation for the co-solvent DIN (Diisopropylnaphthalene)
are discussed.
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