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Showing 1 to 20 of 100 for “"X-ray Emission"”.
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ANALYTICAL APPLICATIONS OF PARTICLE INDUCED X-RAY EMISSION (PIXE) SPECTROSCOPY
… multielemental analysis using Particle Induced X-ray Emission (PIXE) using 1 and 2 MeV proton bombardment on thin targets has been achieved. The method is based on the calculation of atomic ratios from experimentally determined relative x-ray efficiency curves. Sample preparation techniques …
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Magnetic jets from accretion disks : field structure and X-ray emission
… intensiven Aufblitzen von Gamma-Strahlung (Gamma Ray Bursts). Insbesondere hat sich gezeigt, dass die Jets der Mikro-Quasare wahrscheinlich als kleinskalige Version der Jets der AGN anzusehen sind. Neben den Beobachtungen haben vor allem auch theoretische Überlegungen gezeigt, dass Magnetfelder …
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X-ray emission spectroscopic study of chloride solid compounds using synchrotron radiation
An x-ray emission spectrometer, developed at beamline 9.3.1 of the Advance Light Source (ALS), Lawrence Berkeley National Laboratory (LBNL), will allow performing measurements of x-ray emission from molecules and materials in gas, liquid and solid phases with energy, angle and polarization …
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Operando Characterization of Lithium-Ion Batteries using Lab-Scale X-ray Emission/Absorption Spectroscopy
… Core-hole characterization techniques such as X-ray Emission Spectroscopy (XES) and X-ray Absorption Fine Structure (XAFS) perform this role well through the generation/quenching of core holes in the sample. Laboratory-based core hole x-ray spectroscopy techniques have recently gained popularity …
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X-Ray Emission From the Interaction of a Macroscopic Particle With a Dense Plasma Focus
Made available in DSpace on 2014-12-12T20:54:34Z (GMT). No. of bitstreams: 1 7709245.pdf: 4297810 bytes, checksum: 3f2412a0054cdc156d6f1c16e433d4b8 (MD5) Previous issue date: 1976
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The Nature and Origin of Large Scale Diffuse X -Ray Emission in the Large Magellanic Cloud
X-ray mosaics of the Large Magellanic Cloud (LMC) taken with the ROSAT Position Sensitive Proportional Counter (PSPC) have revealed extensive diffuse X-ray emission, indicative of hot ≳ 106 K gas associated with this irregular galaxy on scales from ∼10 pc to ≥1000 pc. Here we examine …
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I. X-Ray Emission Spectrography of Multicomponent Systems. Ii. Studies Ofadhesive Films With Secondary X-Rays
Made available in DSpace on 2014-12-05T19:37:16Z (GMT). No. of bitstreams: 1 6000195.pdf: 4065980 bytes, checksum: 5bd0f0611a2cf04fc29caa2f1c07951c (MD5) Previous issue date: 1959
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The design and performance of an x-ray emission spectrometer using the polarized Kalpha spectra of chlorine and potassium
The x-ray emission spectrometer was designed to observe the polarization of x-ray fluorescence resulting from the excitation of a sample by synchrotron radiation. The incident photons are intense, monoenergetic and linearly polarized along the plane of the storage-ring orbit. The emission …
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Development and evaluation of an ion induced x-ray emission system for the analysis of light and medium weight elements
… describes the development of a proton induced X-ray emission (PIXE) analysis system, especially designed and builtfor routine quantitative multi-elemental analysis of a large number of samples. The historical and general developments of the analytical technique and the physical processes involved …
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A unique electric discharge-excited solid state x-ray laser
… direct charged-particle Bremsstrahlung) x-ray emission in the 1-2 keV range. Anomalous x-ray emission is attributed to ion implantation rather than normal electron Bremsstrahlung x-ray emission. A striking characteristic is that the x-ray energy can be several times the energy of the …
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Hard X-ray and radio studies of solar flares
Combined X-ray and radio observations of the Sun provide powerful diagnostics of particle acceleration and transport effects during solar flares. In this thesis we present observations of two solar flares. In the first event we report what we believe to be the first observation of hard X-ray …
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MODELING X-RAY DATA OF BLACK HOLE BINARIES
… disc models using multiwavelength (optical/UV/X-ray) data from the 2005 hard state outburst of the black hole SWIFT J1753.5-0127. This system is both fairly bright and has fairly low interstellar absorption, so gives one of the best datasets to study the weak, cool disc emission in this state. We …
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Density Functional Theory augmented Multiplet Ligand Field Theory Applied to X-ray Spectroscopy of 3d Transition Metals
… multiplet ligand field theory (MLFT) model of x-ray spectroscopy with density functional theory (DFT), with the goal of making it more ab-initio so that it can be used for predictive applications instead of just interpretive. The main improvements come from reducing the number of free parameters …
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Spectroscopic characterisation of novel materials for semiconductor device applications
… films and the CDO layers were analysed using X-ray photoelectron spectroscopy (XPS). Synchrotron radiation based x-ray absorption spectroscopy GAS) and x-ray emission spectroscopy (XES) as well as resonant soft X-ray emission spectroscopy (RSXE) have been used to provide information on the …
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Development of an on-demand beam pulsing system for Pixe-analysis of thick targets
… concerns the developnent of a proton irduced X-ray emission (PIXE) analysis system and a multi-sample scattering chamber facility. The characteristics of the beam pulsing system and its counting rate capabilities were evaluated by observing the ion-induced X-ray emission from pure thick copper …
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Comprehensive Model of Jupiter's Polar Aurora
The source of auroral X-ray emission from the Jovian polar caps, whether from electron bremsstrahlung or heavy ion precipitation, has been a topic of debate for the past 40 years, beginning with the Einstein Observatory's first measurement of X-ray emission in 1979. Since then the Roentgen …
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Numerical modeling of radio emission from young supernova remnants
… near the outer boundary in both radio and X-ray emission. The magnetic field in the radio shell has been inferred to be in the range of $10\sp{-4}\sim10\sp{-3}G$ by the minimum energy requirements. The detailed polarization studies reveal that the magnetic field in the shell exhibits a …
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Spitzer's Contribution to the AGN Population
… selection techniques (e.g. UV/ optical/X-ray). To do so, we take particular advantage of the mid-IR, which is minimally affected by obscuration. We first select as AGN candidates those objects whose radio emission is significantly brighter, relative to the mid-IR, than would be predicted …
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Studying Particle and Energy Transport using Nuclear and X-ray Diagnostics for Discovery Science and Inertial Confinement Fusion
… explored. This experiment utilized enhanced x-ray emission from the glass mixed into the hot spot, and the resulting data was used to validate different ion-diffusion models. The observed x-ray emission was modeled with an ion-Fokker Planck code, indicating that a significant component of the …
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