Delayed Light Emission Of Tetraphenyl-butadiene Excited By Liquid Argon Scintillation Light. Current Status And Future Plans

dc.creatorSegreto
dc.creatorE.; Machado
dc.creatorA. A.; Araujo
dc.creatorW.; Teixeira
dc.creatorV.
dc.date2016
dc.datefev
dc.date2017-11-13T13:24:20Z
dc.date2017-11-13T13:24:20Z
dc.date.accessioned2018-03-29T05:56:52Z
dc.date.available2018-03-29T05:56:52Z
dc.identifierJournal Of Instrumentation. Iop Publishing Ltd, v. 11, p. , 2016.
dc.identifier1748-0221
dc.identifierWOS:000371479800010
dc.identifier10.1088/1748-0221/11/02/C02010
dc.identifierhttp://iopscience.iop.org/article/10.1088/1748-0221/11/02/C02010
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/328278
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1365303
dc.descriptionTetraphenyl-butadiene is the wavelength shifter most widely used in combination with liquid argon. The latter emits scintillation photons with a wavelength of 127 nm that need to be downshifted to be detected by photomultipliers with glass or quartz windows. Tetraphenyl-butadiene has been demonstrated to have an extremely high conversion efficiency, possibly higher than 100% for 127 nm photons, while there is no precise information about the time dependence of its emission. It is usually assumed to be exponentially decaying with a characteristic time of the order of one ns, as an extrapolation from measurements with exciting radiation in the near UV. This work shows that tetraphenyl-butadiene, when excited by 127 nm photons, re-emits photons not only with a very short decay time, but also with slower ones due to triplet states de-excitations. This fact can strongly contribute to clarifying the anomalies in liquid-argon scintillation light reported in the literature since the 1970s. Precision measurements of the properties of TPB, when excited by Vacuum Ultra Violet photons are being carried on at the Brazilian Synchrotron Light Laboratory in Campinas (State of Sao Paulo).
dc.description11
dc.descriptionConference on Light Detection in Noble Elements (LIDINE)
dc.descriptionAUG 28-30, 2015
dc.descriptionAlbany, NY
dc.languageEnglish
dc.publisherIOP Publishing Ltd
dc.publisherBristol
dc.relationJournal of Instrumentation
dc.rightsfechado
dc.sourceWOS
dc.subjectScintillators, Scintillation And Light Emission Processes (solid, Gas And Liquid Scintillators)
dc.subjectNoble Liquid Detectors (scintillation, Ionization, Double-phase)
dc.subjectPhotoemission
dc.subjectCryogenic Detectors
dc.titleDelayed Light Emission Of Tetraphenyl-butadiene Excited By Liquid Argon Scintillation Light. Current Status And Future Plans
dc.typeActas de congresos


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