Search results for "X-ray Spectroscopy"

showing 3 items of 93 documents

Spectroscopic characterization of alkaline earth uranyl carbonates

2005

A series of alkaline uranyl carbonates, M[UO{sub 2}(CO{sub 3}){sub 3}].nH{sub 2}O (M=Mg{sub 2}, Ca{sub 2}, Sr{sub 2}, Ba{sub 2}, Na{sub 2}Ca, and CaMg) was synthesized and characterized by inductively coupled plasma mass spectrometry (ICP-MS) and atomic absorption spectrometry (AAS) after nitric acid digestion, X-ray powder diffraction (XRD), and thermal analysis (TGA/DTA). The molecular structure of these compounds was characterized by extended X-ray absorption fine-structure (EXAFS) spectroscopy and X-ray photoelectron spectroscopy (XPS). Crystalline Ba{sub 2}[UO{sub 2}(CO{sub 3}){sub 3}].6H{sub 2}O was obtained for the first time. The EXAFS analysis showed that this compound consists of …

spectroscopysynthesisAbsorption spectroscopyTRLFSAnalytical chemistryElectron spectroscopyUranyl carbonateuraniumInorganic Chemistrycarbonatechemistry.chemical_compoundXPSMaterials ChemistrystructurePhysical and Theoretical ChemistrySpectroscopyX-ray spectroscopyExtended X-ray absorption fine structureChemistryCondensed Matter PhysicsUranylalkaline earthElectronic Optical and Magnetic MaterialsEXAFSX-ray crystallographyCeramics and CompositesJournal of Solid State Chemistry
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The Large Observatory For x-ray Timing

2014

The Large Observatory For x-ray Timing (LOFT) was studied within ESA M3 Cosmic Vision framework and participated in the final down-selection for a launch slot in 2022-2024. Thanks to the unprecedented combination of effective area and spectral resolution of its main instrument, LOFT will study the behaviour of matter under extreme conditions, such as the strong gravitational field in the innermost regions of accretion flows close to black holes and neutron stars, and the supra-nuclear densities in the interior of neutron stars. The science payload is based on a Large Area Detector (LAD, 10 m 2 effective area, 2-30 keV, 240 eV spectral resolution, 1 deg collimated field of view) and a WideFi…

x-ray and γ-ray instrumentationcompact objects; microchannel plates; X-ray detectors; X-ray imaging; X-ray spectroscopy; X-ray timing; Electronic Optical and Magnetic Materials; Condensed Matter Physics; Computer Science Applications1707 Computer Vision and Pattern Recognition; Applied Mathematics; Electrical and Electronic EngineeringVisionX-ray timingObservatoriesField of view01 natural sciences7. Clean energyneutron starsObservatory010303 astronomy & astrophysicsPhysicsEquipment and servicesApplied MathematicsAstrophysics::Instrumentation and Methods for AstrophysicsSteradian[ SDU.ASTR.IM ] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]Computer Science Applications1707 Computer Vision and Pattern RecognitionX-ray detectorsCondensed Matter Physicscompact objectsX-ray spectroscopyAstrophysics - Instrumentation and Methods for AstrophysicsX-ray detector[PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]Cosmic VisionSpectral resolutionmicrochannel platesAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesNOmicrochannel platecompact objects; microchannel plates; X-ray detectors; X-ray imaging; X-ray spectroscopy; X-ray timing; Electronic Optical and Magnetic Materials; Condensed Matter Physics; Applied Mathematics; Electrical and Electronic EngineeringSettore FIS/05 - Astronomia e AstrofisicaX-rayscompact object0103 physical sciencesElectronicOptical and Magnetic MaterialsElectrical and Electronic EngineeringSpectral resolutionInstrumentation and Methods for Astrophysics (astro-ph.IM)dense hadronic matterSensors010308 nuclear & particles physicsX-ray imagingAstronomyAccretion (astrophysics)[SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]Neutron star13. Climate actionx-ray and γ-ray instrumentation; neutron stars; dense hadronic matter[ PHYS.ASTR.IM ] Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]Gamma-ray burstastro-ph.IM
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High-rate x-ray spectroscopy in mammography with a CdTe detector: A digital pulse processing approach

2010

Purpose:Direct measurement of mammographic x-ray spectra under clinical conditions is a difficult task due to the high fluence rate of the x-ray beams as well as the limits in the development of high resolution detection systems in a high counting rate environment. In this work we present a detection system, based on a CdTe detector and an innovative digital pulse processing (DPP) system, for high-rate x-ray spectroscopy in mammography. Methods: The DPP system performs a digital pile-up inspection and a digital pulse height analysis of the detector signals, digitized through a 14-bit, 100 MHz digitizer, for x-ray spectroscopy even at high photon counting rates. We investigated on the respon…

x-ray spectroscopy CdTe detectors high photon counting rate digital pulse processing mammography
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