Topic
Synchrotron radiation
About: Synchrotron radiation is a research topic. Over the lifetime, 14639 publications have been published within this topic receiving 244775 citations. The topic is also known as: magnetobremsstrahlung radiation & Synchrotron Radiation.
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TL;DR: In this article, high pressure X-ray diffraction experiments have been performed on PbS, PbSe and PbTe up to 300 kbar with synchrotron radiation.
Abstract: High pressure X-ray diffraction experiments have been performed on PbS, PbSe and PbTe up to 300 kbar with synchrotron radiation. PbS, PbSe and PbTe undergo pressure-induced first-order structural phase transition from NaCl-type (B1) phase to an intermediate phase at about 22, 45 and 60 kbar, respectively. Further structural phase transitions from the intermediate phase to the CsCl-type (B2) phase have been observed in PbS, PbSe and PbTe at about 215, 160 and 130 kbar, respectively. The crystal structures of the intermediate phases of these compounds are discussed.
95 citations
TL;DR: In this article, a method for the calculation of the synchrotron-self-Compton model in spherical geometries, especially in the partially-observable regime, was presented, where an approximation to the Klein-Nishina cross section was used to model the effects of variable electron and incident photon cutoffs.
Abstract: Both spatial and spectral accuracies are stressed in the present method for the calculation of the synchrotron-self-Compton model in spherical geometries, especially in the partially opaque regime of the synchrotron spectrum of inhomogeneous sources that can span a few frequency decades and contribute a significant portion of the scattered flux. A formalism is developed that permits accurate calculation of incident photon density throughout an optically thin sphere. An approximation to the Klein-Nishina cross section is used to model the effects of variable electron and incident photon cutoffs, as well as the decrease in the cross section at high energies. General results are derived for the case of inhomogeneous sources with power law profiles in both electron density and magnetic field.
95 citations
TL;DR: In this article, the Rietveld method is applied to obtain quantitative information about the orientation distribution from the analysis of a single synchrotron diffraction image for hexagonal cold-rolled zirconium, investigated in situ in a vacuum furnace with high-energy X-rays.
Abstract: Preferred orientation is immediately visible on synchrotron diffraction images as intensity variations along Debye rings. In this report, the Rietveld method is applied to obtain quantitative information about the orientation distribution from the analysis of a single synchrotron diffraction image. The method is illustrated for hexagonal cold-rolled zirconium, investigated in situ in a vacuum furnace with high-energy X-rays, both before and after the onset of recrystallization.
95 citations
TL;DR: The evaluation of time-differential measurements of nuclear-resonance scattering using synchrotron radiation sources using the CONUSS program package to gain hyperfine interaction parameters from time spectra is described.
Abstract: Time-differential measurements of nuclear-resonance scattering using synchrotron radiation sources have been performed since 1984. In the present contribution the evaluation of this type of spectra is described. Starting from the theoretical point of view numerical methods are applied to gain hyperfine interaction parameters from time spectra. The CONUSS program package that was developed can be used to interpret either nuclear Bragg-Laue scattering or nuclear forward scattering. It is also possible to investigate combinations of several resonant samples which is important for comparing measurements.
95 citations
TL;DR: A modern 1- to 2-billion-electron-volt synchrotron radiation facility (based on high-brightness electron beams and magnetic undulators) would generate coherent (laser-like) soft x-rays of wavelengths as short as 10 angstroms, which could be used for phase- and element-sensitive microprobing of biological assemblies and material interfaces as well as reserch on the production of electronic microstructures with features smaller than 1000Angstroms.
Abstract: A modern 1- to 2-billion-electron-volt synchrotron radiation facility (based on high-brightness electron beams and magnetic undulators) would generate coherent (laser-like) soft x-rays of wavelengths as short as 10 angstroms. The radiation would also be broadly tunable and subject to full polarization control. Radiation with these properties could be used for phase- and element-sensitive microprobing of biological assemblies and material interfaces as well as reserch on the production of electronic microstructures with features smaller than 1000 angstroms. These short wavelength capabilities, which extend to the K-absorption edges of carbon, nitrogen, and oxygen, are neither available nor projected for laboratory XUV lasers. Higher energy storage rings (5 to 6 billion electron volts) would generate significantly less coherent radiation and would be further compromised by additional x-ray thermal loading of optical components.
95 citations