0000000000564206

AUTHOR

A. F. M. Fernandes

showing 3 related works from this author

Demonstration of the event identification capabilities of the NEXT-White detector

2019

[EN] In experiments searching for neutrinoless double-beta decay, the possibility of identifying the two emitted electrons is a powerful tool in rejecting background events and therefore improving the overall sensitivity of the experiment. In this paper we present the first measurement of the efficiency of a cut based on the different event signatures of double and single electron tracks, using the data of the NEXT-White detector, the first detector of the NEXT experiment operating underground. Using a 228Th calibration source to produce signal-like and background-like events with energies near 1.6 MeV, a signal efficiency of 71.6 ± 1.5 stat ± 0.3 sys% for a background acceptance of 20.6 ± …

Nuclear and High Energy PhysicsPhysical measurementsPhysics - Instrumentation and DetectorsMonte Carlo methodExtrapolationFísica -- MesuramentsFOS: Physical sciences7. Clean energy01 natural sciencesAtomicMathematical SciencesHigh Energy Physics - ExperimentNuclear physicsTECNOLOGIA ELECTRONICAHigh Energy Physics - Experiment (hep-ex)Particle and Plasma PhysicsDouble beta decay0103 physical sciencesDark Matter and Double Beta Decay (experiments)Calibrationlcsh:Nuclear and particle physics. Atomic energy. RadioactivityNuclearCalibratge010306 general physicsNuclear ExperimentMathematical PhysicsPhysicsQuantum Physics010308 nuclear & particles physicsDetectorMolecularDetectorsInstrumentation and Detectors (physics.ins-det)Nuclear & Particles PhysicsCalibrationPhysical Scienceslcsh:QC770-798High Energy Physics::ExperimentSensitivity (electronics)Event (particle physics)Energy (signal processing)
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Radiogenic backgrounds in the NEXT double beta decay experiment

2019

[EN] Natural radioactivity represents one of the main backgrounds in the search for neutrinoless double beta decay. Within the NEXT physics program, the radioactivity- induced backgrounds are measured with the NEXT-White detector. Data from 37.9 days of low-background operations at the Laboratorio Subterraneo de Canfranc with xenon depleted in Xe-136 are analyzed to derive a total background rate of (0.84 +/- 0.02) mHz above 1000 keV. The comparison of data samples with and without the use of the radon abatement system demonstrates that the contribution of airborne-Rn is negligible. A radiogenic background model is built upon the extensive radiopurity screening campaign conducted by the NEX…

Nuclear and High Energy PhysicsPhysical measurementsPhysics - Instrumentation and DetectorsDark Matter and Double Beta DecayDark matterFísica -- Mesuramentschemistry.chemical_elementFOS: Physical sciencesRadon7. Clean energy01 natural sciencesAtomicMathematical SciencesHigh Energy Physics - ExperimentNuclear physicsTECNOLOGIA ELECTRONICAHigh Energy Physics - Experiment (hep-ex)XenonParticle and Plasma PhysicsDouble beta decayDark matter and double beta decay (experiments)0103 physical sciencesDark Matter and Double Beta Decay (experiments)Dark Matterlcsh:Nuclear and particle physics. Atomic energy. RadioactivityNuclear010306 general physicsDouble Beta DecayNatural radioactivityMathematical PhysicsPhysicsQuantum PhysicsRadiogenic nuclide010308 nuclear & particles physicsDetectorMolecularDetectorsInstrumentation and Detectors (physics.ins-det)Nuclear & Particles PhysicschemistryPhysical Scienceslcsh:QC770-798Event (particle physics)
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Energy calibration of the NEXT-White detector with 1% resolution near Q ββ of 136Xe

2019

Excellent energy resolution is one of the primary advantages of electroluminescent high pressure xenon TPCs, and searches for rare physics events such as neutrinoless double-beta decay ($\beta\beta0\nu$) require precise energy measurements. Using the NEXT-White detector, developed by the NEXT (Neutrino Experiment with a Xenon TPC) collaboration, we show for the first time that an energy resolution of 1% FWHM can be achieved at 2.6 MeV, establishing the present technology as the one with the best energy resolution of all xenon detectors for $\beta\beta0\nu$ searches.

Nuclear and High Energy PhysicsPhysics - Instrumentation and DetectorsPhysical measurementsPhysics::Instrumentation and DetectorsDark Matter and Double Beta DecayFísica -- Mesuramentschemistry.chemical_elementBioengineeringAtomic01 natural sciencesMathematical SciencesNuclear physicsParticle and Plasma PhysicsXenonAffordable and Clean Energy0103 physical sciencesDark Matter and Double Beta Decay (experiments)CalibrationNuclearlcsh:Nuclear and particle physics. Atomic energy. RadioactivityCalibratge010306 general physicsMathematical PhysicsPhysicsQuantum Physics010308 nuclear & particles physicsDetectorResolution (electron density)MolecularDetectorsNuclear & Particles PhysicsFull width at half maximumchemistryBeta (plasma physics)Physical SciencesCalibrationlcsh:QC770-798High Energy Physics::ExperimentNeutrinoEnergy (signal processing)
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