Pulse shape study of the fast scintillation light emitted from xenon-doped liquid argon using silicon photomultipliers
JOURNAL OF INSTRUMENTATION(2021)
Abstract
Xenon-doped liquid argon has been proposed as a good alternative to pure liquid argon in scintillation detectors. In this study, we report on the measurement of the time profile of scintillation light emitted from xenon-doped liquid argon with molar concentrations up to 1600 ppm. A compact setup has been developed for this study, with silicon photomultiplier (SiPM) as the photosensor and Po-210 and Sr-90 as scintillation sources. An effective model based on the de-excitation processes has been developed to describe the data. The results show that xenon-doped liquid argon is a good fast scintillator and can be used in lieu of tetraphenyl butadiene (TPB) in a way that preserves its capability for particle identification via pulse shape discrimination (PSD).
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Key words
Ionization and excitation processes,Noble liquid detectors (scintillation, ionization, double-phase),Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators),Photon detectors for UV, visible and IR photons (solid-state) (PIN diodes, APDs, Si-PMTS, G-APDs, CCDs, EBCCDs, EMCCDs, CMOS imagers, etc)
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