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

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 scintill...

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Bibliographic Details
Published inJournal of instrumentation Vol. 15; no. 6; p. C06053
Main Authors Bondar, A., Borisova, E., Buzulutskov, A., Frolov, E., Nosov, V., Oleynikov, V., Sokolov, A.
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.06.2020
Subjects
Argon
Dark matter
Flammability
Hydrogen atoms
Methane
Scintillation counters
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Summary: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.
ISSN:1748-0221
1748-0221
DOI:10.1088/1748-0221/15/06/C06053