Quantum mechanics

Liquid scintillation counting

Detector

Veto

Materials science

Scintillator

Nuclear physics

Photomultiplier

Energy (signal processing)

Calibration

Radiochemistry

Thermodynamics

Physics

Linear alkylbenzene

Politics

Optics

Political science

Pulmonary surfactant

Chemistry

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

This paper describes the liquid scintillator veto system for the COSINE-100 dark matter experiment and its performance. The COSINE-100 detector consists of eight NaI(Tl) crystals immersed in 2200 L of linear alkylbenzene-based liquid scintillator. The liquid scintillator tags between 65 and 75% of the internal 40K background in the 2–6 keV energy region. We also describe the background model for the liquid scintillator, which is primarily used to assess its energy calibration and threshold.

The COSINE-100 liquid scintillator veto system