Search results for "Light"

showing 5 items of 3575 documents

Search for Light Dark Matter Interactions Enhanced by the Migdal Effect or Bremsstrahlung in XENON1T.

2019

Direct dark matter detection experiments based on a liquid xenon target are leading the search for dark matter particles with masses above ∼5 GeV/c2, but have limited sensitivity to lighter masses because of the small momentum transfer in dark matter-nucleus elastic scattering. However, there is an irreducible contribution from inelastic processes accompanying the elastic scattering, which leads to the excitation and ionization of the recoiling atom (the Migdal effect) or the emission of a bremsstrahlung photon. In this Letter, we report on a probe of low-mass dark matter with masses down to about 85 MeV/c2 by looking for electronic recoils induced by the Migdal effect and bremsstrahlung us…

xenon: targetPhysics - Instrumentation and Detectorsdark matter: interactionelastic scatteringGeneral Physics and Astronomy01 natural sciencesHigh Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)XenonIonizationexcited state[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Nuclear ExperimentLight dark matterElastic scatteringPhysicsxenon: liquidatommomentum transferMomentum transferBremsstrahlungInstrumentation and Detectors (physics.ins-det)photon: bremsstrahlungS030DN5Weakly interacting massive particlesExcited stateAstrophysics - Cosmology and Nongalactic AstrophysicsCosmology and Nongalactic Astrophysics (astro-ph.CO)Dark matterLight Dark Matter Direct search Liquid Xenon TPCFOS: Physical sciencesS030DI5chemistry.chemical_elementNuclear physicsParticle dark matterrecoilionization0103 physical sciencesDark matter[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]010306 general physicsscintillation counterS030DP5010308 nuclear & particles physicsdown: masssensitivityDark matter Particle dark matter Weakly interacting massive particles* Automatic Keywords *chemistryElementary Particles and Fieldsbremsstrahlung: emission[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]Physical review letters
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Degalatosylated xyloglucan hydrogels: influence of irradiation conditions on physico-chemical properties and structure

2012

xyloglucantemperature responsive polymerdynamic light scatteringSettore CHIM/07 - Fondamenti Chimici Delle Tecnologie60Co gamma-irradiationgel filtration chromatography
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Resistive switching in memristors based on yttria-stabilized zirconia

2021

yttria-stabilized zirconiaresistive switchingResistive Random Access Memorylight- and noise-induced resistive switchingstochastic resonanceMemristormetal-insulator-metal structuremetal-insulator-semiconductor structurespace-charge-limited current
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Photoluminescence properties of S2 molecule trapped in Melanophlogite

2015

We studied the photoluminescence properties of a sample of SiO2-clathrate Melanophlogite, a crystalline microporous material which is found in nature as a rare mineral. Upon β irradiation, the material displays an intense light emission under near-UV illumination. We studied in detail this optical activity by steady-state and time-resolved photoluminescence measurements as a function of temperature. The spectroscopic properties we find can be ascribed to a population of quasi-free molecules trapped within each of the two different types of cage available in the structure of this clathrate, although the spectroscopic properties of the guest molecules are affected by their interactions with t…

β IrradiationPhotoluminescenceClathrate hydratePopulation02 engineering and technologyengineering.material010402 general chemistry01 natural sciencesGeochemistry and PetrologyMoleculeGeneral Materials ScienceClathrateeducationPhotoluminescenceeducation.field_of_studyS2 moleculeChemistryMicroporous material021001 nanoscience & nanotechnology0104 chemical sciencesChemical physicsMelanophlogiteMelanophlogiteExcited stateengineeringLight emissionMaterials Science (all)Atomic physics0210 nano-technology
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GEOCHEMISTRY OF THE GAS MANIFESTATIONS OF GREECE: METHANE AND LIGHT HYDROCARBONS

2017

Το σύνθετο γεωδυναμικό καθεστώς της Ελλάδας πηγάζει από την πολύπλοκη γεωλογική της ιστορία, η οποία χαρακτηρίζεται από έντονη σεισμική δραστηριότητα και ενισχυμένη γεωθερμική βαθμίδα. Αυτή η δραστηριότητα σε συνδυασμό με το ενεργό ηφαιστειακό τόξο, ευνοεί την ύπαρξη πολλών εκπομπών αερίων, με αποτέλεσμα την κατηγοριοποίηση σε CO2-, N2- και CH4-αέρια, ανάλογα με το επικρατών είδος. Η παρούσα εργασία επικεντρώνεται στο μεθάνιο και τους ελαφρούς υδρογονάνθρακες (C2-C6) με σκοπό τον προσδιορισμό της προέλευσή τους. Οι συγκεντρώσεις του CH4 (<2 έως 915,200 μmol/mol) και η ισοτοπική του αναλογία (δ13C -79.8 έως +16.9 ‰, δD -298 έως +264‰) καλύπτουν ένα ευρύ φάσμα τιμών, που υποδεικνύει διαφορ…

υδροθερμικά αέρια010504 meteorology & atmospheric sciencesπροέλευση υδρογονανθράκωνMineralogyΕλληνική περιοχή010502 geochemistry & geophysics01 natural sciencesMedicinal chemistryLight hydrocarbonsSettore GEO/08 - Geochimica E Vulcanologiahydrothermal gasesεκπομπές ψυχρών αερίωνHellenic territoryorigin of hydrocarbon gasesHellenic territory hydrothermal gases cold gas emissions origin of hydrocarbon gasesMaterials Chemistrycold gas emissionsGeology0105 earth and related environmental sciences
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