Quenching of fluorescence for linear alkylbenzene

TL;DR

This paper investigates the quenching effects on linear alkylbenzene-based liquid scintillators used in neutrino detection, presenting a measurement instrument and analyzing quencher impacts on scintillation light.

Contribution

It introduces a novel quenching factor measurement instrument and compares two quenchers, providing insights into optimizing scintillator performance for neutrino experiments.

Findings

Quenching reduces scintillation light to desired levels.

Emission spectrum remains stable without quencher.

Instrument effectively measures quenching factors.

Abstract

Linear alkylbenzene (LAB) based liquid scintillator is adopted as the central detector for the Jiangmen Underground Neutrino Observatory (JUNO) liquid scintillator detectors. A quenching factor measurement instrument is designed based on the Compton scattering process. Two different quenchers for the liquid scintillator have been investigated and the result shows that the scintillation light of the JUNO liquid scintillator can be quenched to a level. The emission spectrum with the absence of the quencher is also showing a desired behavior.