Observation of primary scintillations in the visible range in liquid argon doped with methane

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Abstract

Neutron veto detector based on liquid scintillator containing hydrogen atoms is an integral part of any underground experiment for dark matter search. So far, a flammable mixture of liquid hydrocarbons was used as a liquid scintillator in such detectors. A safe alternative might be a liquid scintillator based on liquid argon doped with methane. In this work, we have studied the primary scintillations in pure liquid argon and its mixtures with methane, the CH4 content varying from 100 ppm to 5%. The primary scintillations have for the first time been observed in liquid argon doped with methane, in the visible and near infrared range, and their relative light yields have been measured as a function of the CH4 content.

Original languageEnglish
Article numberC06053
Number of pages11
JournalJournal of Instrumentation
Volume15
Issue number6
DOIs
Publication statusPublished - 1 Jun 2020

Keywords

  • axions
  • Dark Matter detectors (WIMPs
  • double-phase)
  • etc.)
  • fast neutrons)
  • gas and liquid scintillators)
  • ionization
  • Neutron detectors (cold
  • Noble liquid detectors (scintillation
  • scintillation and light emission processes (solid
  • Scintillators
  • thermal
  • Noble liquid detectors (scintillation, ionization, double-phase)
  • Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators)
  • Dark Matter detectors (WIMPs, axions, etc.)
  • Neutron detectors (cold, thermal, fast neutrons)

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