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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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Journal ArticleDOI
TL;DR: In this article, the potential of synchrotron radiation techniques to understand the structural and electronic properties of coordination compounds is discussed, including the contribution arising from more specialized techniques that have become more widely used in the last years, such as the total scattering approach in the XRPD data analysis and X-ray emission spectroscopy.

89 citations

Journal ArticleDOI
01 Aug 1963-Nature
TL;DR: The existence of radio sources with an angular extension less than 1″ is well known as mentioned in this paper, and the evidence of a rather strong linear polarization suggest the synchrotron mechanism of radio emission.
Abstract: THE existence of a number of radio sources with an angular extension less than 1″ is well known1. Some of them were identified with star-like objects and therefore they are referred to as radio stars. Among these are 3C-48, 3C-119, 3C-147, 3C-273, 3C-286. Their non-thermal spectra and the evidence of a rather strong linear polarization suggest the synchrotron mechanism of radio emission. Twiss2, Razin3, and Le Roux4 have shown that a self-absorption of synchrotron radiation by relativistic electrons must occur at frequencies f < f1, f1 depending on relativistic electrons concentration, normal component of magnetic field H⊥, spectral index of radio emission α (the spectrum being of the form S(f) ∝ f−a), and on linear dimension of radio-emitting region. At frequencies below f1 the spectrum of radio emission is S(f) ∝ f2.5 whatever α is, thus f1 is a frequency where maximum flux density of a radio source occurs.

89 citations

Journal Article
TL;DR: In this article, photoexcited chemical vapor deposition (CVD) and etching using synchrotron radiation as an exciting light source were experimentally demonstrated, and reaction models for gas phase excitation and surface excitation were proposed.
Abstract: Photoexcited chemical‐vapor deposition (CVD) and etching using synchrotron radiation as an exciting light source were experimentally demonstrated. CVD of silicon nitride film and etching of Si and SiO2 by SF6+O2 gases are described in detail. In several reaction systems, it was found that the surface photoexcitation was an important mechanism. Reaction models for gas‐phase excitation and surface excitation were proposed.

89 citations

Journal ArticleDOI
TL;DR: In this article, the beamline design, microscope specifications, and initial results from the new mid-infrared beamline (IRENI) are reviewed, along with future enhancements and plans for implementation of similar, small-scale instruments.
Abstract: The beamline design, microscope specifications, and initial results from the new mid-infrared beamline (IRENI) are reviewed. Synchrotron-based spectrochemical imaging, as recently implemented at the Synchrotron Radiation Center in Stoughton, Wisconsin, demonstrates the new capability to achieve diffraction limited chemical imaging across the entire mid-infrared region, simultaneously, with high signal-to-noise ratio. IRENI extracts a large swath of radiation (320 hor. × 25 vert. mrads2) to homogeneously illuminate a commercial infrared (IR) microscope equipped with an IR focal plane array (FPA) detector. Wide-field images are collected, in contrast to single-pixel imaging from the confocal geometry with raster scanning, commonly used at most synchrotron beamlines. IRENI rapidly generates high quality, high spatial resolution data. The relevant advantages (spatial oversampling, speed, sensitivity, and signal-to-noise ratio) are discussed in detail and demonstrated with examples from a variety of disciplines, including formalin-fixed and flash-frozen tissue samples, live cells, fixed cells, paint cross-sections, polymer fibers, and novel nanomaterials. The impact of Mie scattering corrections on this high quality data is shown, and first results with a grazing angle objective are presented, along with future enhancements and plans for implementation of similar, small-scale instruments.

89 citations

Journal ArticleDOI
TL;DR: It is shown that state-selected methyl cations can be produced by TPEPICO spectroscopy for ion-molecule reaction studies, which are very important for the understanding of the planetary ionosphere chemistry.
Abstract: Threshold photoelectron spectra (TPES) of the isotopomers of the methyl radical (CH3, CH2D, CHD2, and CD3) have been recorded in the 9.5−10.5 eV VUV photon energy range using third generation synchrotron radiation to investigate the vibrational spectroscopy of the corresponding cations at a 7−11 meV resolution. A threshold photoelectron−photoion coincidence (TPEPICO) spectrometer based on velocity map imaging and Wiley−McLaren time-of-flight has been used to simultaneously record the TPES of several radical species produced in a Ar-seeded beam by dc flash-pyrolysis of nitromethane (CHxDyNO2, x + y = 3). Vibrational bands belonging to the symmetric stretching and out-of-plane bending modes have been observed and P, Q, and R branches have been identified in the analysis of the rotational profiles. Vibrational configuration interaction (VCI), in conjunction with near-equilibrium potential energy surfaces calculated by the explicitly correlated coupled cluster method CCSD(T*)-F12a, is used to calculate vibrat...

89 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023266
2022661
2021203
2020258
2019288
2018260