Search results for "Flux ratio"

showing 2 items of 2 documents

Highlights from the ARGO-YBJ Experiment

2012

""The ARGO-YBJ experiment at YangBaJing in Tibet (4300m a.s.l.) has been taking data with its full layout since October 2007. Here we present a few significant results obtained in gamma-ray astronomy and cosmic-ray physics. Emphasis is placed on the analysis of gamma-ray emission from point-like sources (Crab Nebula, MRK 421), on the preliminary limit on the antiproton\\\/proton flux ratio, on the large-scale cosmic-ray anisotropy and on the proton-air cross-section. The performance of the detector is also discussed, and the perspectives of the experiment are outlined.""

HistoryAstronomyFluxAstrophysicsProton flux01 natural sciencesArgo-YbjGamma-ray emissionSettore FIS/05 - Astronomia E AstrofisicaCosmic-ray physicsResistive Plate ChambersInstrumentation010303 astronomy & astrophysicsArgoPhysicsRange (particle radiation)DetectorSettore FIS/01 - Fisica SperimentaleCrab nebulaAstrophysics::Instrumentation and Methods for AstrophysicsGamma rayCrab nebula Extensive air showers Flux ratio Gamma-ray astronomy Gamma-ray emission Ground based Resistive plate chambers; Astronomy Cosmic rays Cosmology Experiments; Gamma raysFlux ratioCosmologyComputer Science ApplicationsResistive plate chambersNuclear and High Energy PhysicsX- and γ-ray instrumentGround-based gamma-ray astronomyAstrophysics::High Energy Astrophysical PhenomenaExtensive air showerCosmic rayAstrophysics::Cosmology and Extragalactic AstrophysicsCosmic RayEducationResistive Plate Chambers Extensive air showers Ground-based g ray astronomy Cosmic-ray physicsGround-based γ-ray astronomy0103 physical sciencesExtensive air showersCosmic raysExtensive air showers X- and γ-ray instruments Pulsars. Quasars active or peculiar galaxies objects and systemsAstrophysics::Galaxy AstrophysicsGamma-ray astronomy010308 nuclear & particles physicsGamma raysAstronomyResistive Plate ChamberGround basedCrab NebulaAntiprotonResistive Plate Chambers; Extensive air showers; Ground-based γ-ray astronomy; Cosmic-ray physicsSatelliteGamma-ray burstExperimentsJournal of Physics: Conference Series
researchProduct

Re-entrance phase formation of CeSb thin films

2001

Abstract We report the epitaxial growth of (1 0 0)- and (1 1 1)-oriented CeSb thin films on Al 2 O 3 (1 1 2 0) and (0 0 0 1) substrates by means of molecular beam epitaxy. Depending on the overall Sb-to-Ce flux ratio and the molecular state of Sb x , we observe a re-entrance behavior in the phase formation and orientation of CeSb on Al 2 O 3 (1 1 2 0) . This behavior is shown to exhibit, in some respect, similarities to III–V compound growth, but also more complexities due to the instability of the rare earth component against oxidation. A geometric orientation selection model is suggested which reproduces the observed re-entrance behavior as well as the overall CeSb growth rate.

Condensed matter physicsChemistryStereochemistryHeterojunctionCondensed Matter PhysicsEpitaxyInstabilityPhase formationFlux ratioInorganic ChemistryMaterials ChemistryGrowth rateThin filmMolecular beam epitaxyJournal of Crystal Growth
researchProduct