Fluorescence emission of the JUNO liquid scintillator

作者：Marco Beretta, Fatima Houria, F. Ferraro, D. Basilico, A. Brigatti, B. Caccianiga, Aurelio Caslini, Cecilia Landini, P. Lombardi, Luca Pelicci, E. Percalli, G. Ranucci, A. Re, Catia Clementi, F. Ortica, A. Romani, V. Antonelli, M. Giammarchi, L. Miramonti, P. Saggese, Marco Danilo Claudio Torri, S. Aiello, Giuseppe Andronico, Andrea Barresi, Antonio Bergnoli, M. Borghesi, R. Brugnera, Riccardo Bruno, A. Budano, Antonio Cammi, Vanessa Cerrone, R. Caruso, D. Chiesa, Claudio Coletta, Luca D’Auria, S. Dusini, Andrea Fabbri, G. Felici, A. Garfagnini, N. Giudice, Arsenii Gavrikov, M. Grassi, Nunzio Guardone, L. Lastrucci, I. Lippi, Lorenzo Loi, Claudio Lombardo, F. Mantovani, S. M. Mari, A. Martini, M. Montuschi, M. Nastasi, D. Orestano, A. Paoloni, F. Petrucci, E. Previtali, Bernardo Ricci, G. Sava, Andrea Serafini, C. Sirignano, M. Sisti, L. Stanco, E. Stanescu Farilla, Virginia Strati, C. Tuvé, Carlo Venettacci, G. Verde, L. Votano · 发表于：Journal of Instrumentation · 年份：2025 · DOI：10.1088/1748-0221/20/05/p05009 · 被引用次数：8 · 研究领域：Neutrino Physics Research、Astrophysics and Cosmic Phenomena、Particle physics theoretical and experimental studies

Abstract JUNO is a huge neutrino detector that will use 20 kton of organic liquid scintillator as its detection medium. The scintillator is a mixture of linear alkyl benzene (LAB), 2.5 g/L of 2,5-diphenyloxazole (PPO) and 3 mg/L of 1,4-Bis(2-methylstyryl)benzene (Bis-MSB). The main goal of JUNO is to determine the Neutrino Mass Ordering [1,2,3]. In order to achieve this purpose, good energy and position reconstruction is required, hence a complete understanding of the optical characteristics of the liquid scintillator is mandatory. In this paper we present the first measurements on the JUNO scintillator emission spectrum, absorption length and fluorescence time distribution performed respectively with a spectrofluorimeter, a spectrophotometer and a custom made setup of the liquid scintillator produced by the JUNO purification plants.