Secondary scintillation yield of xenon with sub-percent levels of CO2 additive for rare-event detection
dc.contributor.author
dc.date.accessioned
2019-09-10T08:40:35Z
dc.date.available
2019-09-10T08:40:35Z
dc.date.issued
2017-10-10
dc.identifier.issn
0370-2693
dc.identifier.uri
dc.description.abstract
Xe–CO2 mixtures are important alternatives to pure xenon in Time Projection Chambers (TPC) based on secondary scintillation (electroluminescence) signal amplification with applications in the important field of rare event detection such as directional dark matter, double electron capture and double beta decay detection. The addition of CO2 to pure xenon at the level of 0.05–0.1% can reduce significantly the scale of electron diffusion from 10 mm/m to 2.5 mm/m, with high impact on the discrimination efficiency of the events through pattern recognition of the topology of primary ionization trails. We have measured the electroluminescence (EL) yield of Xe–CO2 mixtures, with sub-percent CO2 concentrations. We demonstrate that the EL production is still high in these mixtures, 70% and 35% relative to that produced in pure xenon, for CO2 concentrations around 0.05% and 0.1%, respectively. The contribution of the statistical fluctuations in EL production to the energy resolution increases with increasing CO2 concentration, being smaller than the contribution of the Fano factor for concentrations below 0.1% CO2
dc.description.sponsorship
The NEXT Collaboration acknowledges support from the fol-lowing agencies and institutions: the European Research Coun-cil (ERC) under the Advanced Grant 339787-NEXT; the Ministerio de Economía y Competitividad of Spain under grants FIS2014-53371-C04 and the Severo Ochoa Program SEV-2014-0398; the GVA of Spain under grant PROMETEO/2016/120; the Portuguese FCT under project PTDC/FIS-NUC/2525/2014; the U.S. Department of Energy under contracts number DE-AC02-07CH11359 (Fermi National Accelerator Laboratory) and DE-FG02-13ER42020 (Texas A&M); the University of Texas at Arlington. C.A.O.H., E.D.C.F., C.M.B.M. and C.D.R.A. acknowledge FCT under grants PD/BD/105921/2014, SFRH/BPD/109180/2015, SFRH/BPD/76842/2011 and SFRH/BPD/79163/2011, respectively
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.relation.isformatof
Reproducció digital del document publicat a: https://doi.org/10.1016/j.physletb.2017.09.017
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Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2017, vol. 773, p. 663-671
dc.relation.ispartofseries
Articles publicats (D-EMCI)
dc.rights
Attribution 4.0 International
dc.rights.uri
dc.subject
dc.title
Secondary scintillation yield of xenon with sub-percent levels of CO2 additive for rare-event detection
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/openAccess
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.identifier.idgrec
027552
dc.type.peerreviewed
peer-reviewed