Fluorescence time profile measurement of LAB based liquid scintillator in response to medium relativistic ion particles

Abstract

Liquid scintillator is widely used in particle physics experiments due to its high light yield, good timing resolution, scalability and low cost. Certain liquid scintillators exhibit pulse shape discrimination capabilities because of difference in fluorescence timing properties induced by different particles. Its fluoresence timing properties have been measured mostly for radioactive decay sources at MeV energies. We present a novel measurement of fluorescence time properties of LAB based liquid scintillator in response to high-energy ions of hydrogen (Z = 1), helium (Z = 2) and Krypton at around 200-300 MeV/u for the first time. We compared the results to those from radioactive sources and observed a distinct $dE/dX$ dependence, regardless of the particle type. These findings are essential for physics searches such as the diffuse supernova neutrino background in large liquid scintillator detectors like JUNO, and are also critical towards understanding the underlying scintillation timing mechanism.

References in corpus (7)

• Observation of electron-antineutrino disappearance at Daya Bay
• Search for the Majorana Nature of Neutrinos in the Inverted Mass Ordering Region with KamLAND-Zen
• Prospects for Detecting the Diffuse Supernova Neutrino Background with JUNO
• Potential to identify neutrino mass ordering with reactor antineutrinos at JUNO
• Prediction of Energy Resolution in the JUNO Experiment
• Simulation Software of the JUNO Experiment
• Fluorescence emission of the JUNO liquid scintillator