Radiopurity measurements of liquid scintillator for the COSINE-100 Upgrade

2024/11/08 by J. Kim, Kim, J., C. Ha +27 · 1 citation
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Instrumentation and Detectors (physics.ins-det) #Neutrino Physics Research #Radiation Detection and Scintillator Technologies

paper · pdf · doi:10.48550/arxiv.2411.05256

openalex publication_date 2024/11/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

A new 2,400 L liquid scintillator has been produced for the COSINE-100 Upgrade, which is under construction at Yemilab for the next COSINE dark matter experiment phase. The linear-alkyl-benzene-based scintillator is designed to serve as a veto for NaI(Tl) crystal targets and a separate platform for rare event searches. We measured using a sample consisting of a custom-made 445 mL cylindrical Teflon container equipped with two 3-inch photomultiplier tubes. Analyses show activity levels of 0.091 ± 0.042 mBq/kg for ²³⁸U and 0.012 ± 0.007 mBq/kg for ²³²Th.

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