Bibliografias temáticas / Vaccum Ultraviolet absorption spectroscopy with synchrotron radiation

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Literatura científica selecionada sobre o tema "Vaccum Ultraviolet absorption spectroscopy with synchrotron radiation"

Autor: Grafiati
Publicado: 5 de outubro de 2024
Última modificação: 31 de julho de 2025

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Artigos de revistas sobre o assunto "Vaccum Ultraviolet absorption spectroscopy with synchrotron radiation"

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Aiura, Yoshihiro, Kenichi Ozawa, Kazuhiko Mase, Makoto Minohara, and Satoshi Suzuki. "Development of a high-precision XYZ translator and estimation of beam profile of the vacuum ultraviolet and soft X-ray undulator beamline BL-13B at the Photon Factory." Journal of Synchrotron Radiation 27, no. 4 (2020): 923–33. http://dx.doi.org/10.1107/s1600577520006712.

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A high-precision XYZ translator was developed for the microanalysis of electronic structures and chemical compositions on material surfaces by electron spectroscopy techniques, such as photoelectron spectroscopy and absorption spectroscopy, utilizing the vacuum ultraviolet and soft X-ray synchrotron radiation at an undulator beamline BL-13B at the Photon Factory. Using the high-precision translator, the profile and size of the undulator beam were estimated. They were found to strongly depend on the photon energy but were less affected by the polarization direction. To demonstrate the microscop
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Kooser, Kuno, Antti Kivimäki, Paavo Turunen, et al. "Gas-phase endstation of electron, ion and coincidence spectroscopies for diluted samples at the FinEstBeAMS beamline of the MAX IV 1.5 GeV storage ring." Journal of Synchrotron Radiation 27, no. 4 (2020): 1080–91. http://dx.doi.org/10.1107/s1600577520007146.

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Since spring 2019 an experimental setup consisting of an electron spectrometer and an ion time-of-flight mass spectrometer for diluted samples has been available for users at the FinEstBeAMS beamline of the MAX IV Laboratory in Lund, Sweden. The setup enables users to study the interaction of atoms, molecules, (molecular) microclusters and nanoparticles with short-wavelength (vacuum ultraviolet and X-ray) synchrotron radiation and to follow the electron and nuclear dynamics induced by this interaction. Test measurements of N2 and thiophene (C4H4S) molecules have demonstrated that the setup can
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Mendes, Mónica, Fábris Kossoski, Ana I. Lozano, et al. "Excited States of Bromopyrimidines Probed by VUV Photoabsorption Spectroscopy and Theoretical Calculations." International Journal of Molecular Sciences 22, no. 12 (2021): 6460. http://dx.doi.org/10.3390/ijms22126460.

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We report absolute photoabsorption cross sections for gas-phase 2- and 5-bromopyrimidine in the 3.7–10.8 eV energy range, in a joint theoretical and experimental study. The measurements were carried out using high-resolution vacuum ultraviolet synchrotron radiation, with quantum chemical calculations performed through the nuclear ensemble approach in combination with time-dependent density functional theory, along with additional Franck–Condon Herzberg–Teller calculations for the first absorption band (3.7–4.6 eV). The cross sections of both bromopyrimidines are very similar below 7.3 eV, devi
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Ubachs, W., E. J. Salumbides, M. T. Murphy, H. Abgrall, and E. Roueff. "H2/HD molecular data for analysis of quasar spectra in search of varying constants." Astronomy & Astrophysics 622 (February 2019): A127. http://dx.doi.org/10.1051/0004-6361/201834782.

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Context. Absorption lines of H2 and HD molecules observed at high redshift in the line of sight towards quasars are a test ground to search for variation of the proton-to-electron mass ratio μ. For this purpose, results from astronomical observations are compared with a compilation of molecular data of the highest accuracy, obtained in laboratory studies as well as in first-principles calculations. Aims. A comprehensive line list is compiled for H2 and HD absorption lines in the Lyman (B1Σu+ − X1Σg+) and Werner (C1Πu − X1Σg+) band systems up to the Lyman cutoff at 912 Å. Molecular parameters l
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Ray, Sekhar Chandra. "Comparison of Electronic Structure and Magnetic Properties of Few Layer Graphene and Multiwall Carbon Nanotubes." Advances in Materials Science and Engineering 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/7362131.

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A comparative study has been made for the non-catalyst based few layer graphene (FLG) and Fe-catalyst based multiwall carbon nanotubes (MWCNTs). Magnetic and electronic properties of FLG and MWCNTs were studied using magnetic M-H hysteresis loops and synchrotron radiation based X-ray absorption fine structure spectroscopy measurements. Structural defects and electronic and bonding properties of FLG/MWCNTs have been studied using Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and ultraviolet photoelectron spectroscopy (UPS). The work functions of FLG and MWCNTs are 4.01 eV and 3.79
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Zheng, Kai, Siying Liu, Juncheng Zhu, et al. "High‐rate CO2‐to‐CH4 Photoreduction by Dual‐proton Hydrogenation Pathway Over Pd‐Anchored Oxygen‐Deficient ZnO Nanosheets." Angewandte Chemie International Edition, June 11, 2025. https://doi.org/10.1002/anie.202508259.

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Photoreduction of CO2 into CH4 usually comprises upto eight proton‐coupled electron transfer steps, greatly reducing the conversion performance. Here, we report a new dual‐proton hydrogenation pathway for CO2‐to‐CH4 conversion, which can condense every two proton‐coupled electron transfer steps into one single step. Also, we pioneer the use of in situ synchrotron‐radiation vacuum ultraviolet photoionization mass spectrometry to distinguish the crucial HCOOH from COOH intermediates, overcoming the limitation of in situ Fourier‐transform infrared spectroscopy. Taking the synthetic Pd/ZnO‐VO nano
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Zheng, Kai, Siying Liu, Juncheng Zhu, et al. "High‐rate CO2‐to‐CH4 Photoreduction by Dual‐proton Hydrogenation Pathway Over Pd‐Anchored Oxygen‐Deficient ZnO Nanosheets." Angewandte Chemie, June 11, 2025. https://doi.org/10.1002/ange.202508259.

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Photoreduction of CO2 into CH4 usually comprises upto eight proton‐coupled electron transfer steps, greatly reducing the conversion performance. Here, we report a new dual‐proton hydrogenation pathway for CO2‐to‐CH4 conversion, which can condense every two proton‐coupled electron transfer steps into one single step. Also, we pioneer the use of in situ synchrotron‐radiation vacuum ultraviolet photoionization mass spectrometry to distinguish the crucial HCOOH from COOH intermediates, overcoming the limitation of in situ Fourier‐transform infrared spectroscopy. Taking the synthetic Pd/ZnO‐VO nano
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De Angelis, Dario, Luca Longetti, Gabriele Bonano, et al. "A sub-100 nm thickness flat jet for extreme ultraviolet to soft X-ray absorption spectroscopy." Journal of Synchrotron Radiation 31, no. 3 (2024). http://dx.doi.org/10.1107/s1600577524001875.

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Experimental characterization of the structural, electronic and dynamic properties of dilute systems in aqueous solvents, such as nanoparticles, molecules and proteins, are nowadays an open challenge. X-ray absorption spectroscopy (XAS) is probably one of the most established approaches to this aim as it is element-specific. However, typical dilute systems of interest are often composed of light elements that require extreme-ultraviolet to soft X-ray photons. In this spectral regime, water and other solvents are rather opaque, thus demanding radical reduction of the solvent volume and removal
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Kumar, S., D. Duflot, N. C. Jones, S. V. Hoffmann, G. García, and P. Limão-Vieira. "The electronic structure of 2(5H)-thiophenone investigated by vacuum ultraviolet synchrotron radiation and theoretical calculations." European Physical Journal D 77, no. 11 (2023). http://dx.doi.org/10.1140/epjd/s10053-023-00771-w.

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AbstractThe electronic state spectroscopy of 2(5H)-thiophenone, C4H4OS, has been investigated by high-resolution vacuum ultraviolet photoabsorption in the 3.76–10.69 eV energy range using synchrotron radiation, together with novel quantum chemical calculations performed at the equation of motion coupled cluster singles and doubles (EOM-CCSD) level of theory. The major electronic transitions have been assigned to valence and Rydberg character, with relevant C=O, C=C and C–C stretching vibrations across the entire absorption spectrum. Photolysis lifetimes in the Earth’s atmosphere (0–50 km altit
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Singh, Param Jeet, Tamaghna Maitra, A. K. Das, et al. "Commissioning and first result of undulator based atomic, molecular, and optical sciences (AMOS) beamline at Indus-2 synchrotron radiation source." Review of Scientific Instruments 95, no. 12 (2024). https://doi.org/10.1063/5.0238362.

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We present a comprehensive overview of the commissioning process and initial results of a synchrotron beamline dedicated to atomic, molecular, and optical sciences at the BL-5 undulator port of the Indus-2 synchrotron facility, Raja Ramanna Center for Advanced Technology, Indore, India. The beamline delivers a photon flux of ∼1012 photons/s with high resolving power (∼10 000) over an energy range of 6–800 eV, making it suitable for high-resolution spectroscopy in atomic, molecular, and optical science. The energy tunability from vacuum ultraviolet to soft x-ray (6–800 eV) is achieved through a
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Mais fontes

Teses / dissertações sobre o assunto "Vaccum Ultraviolet absorption spectroscopy with synchrotron radiation"

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Mitrou, Maria. "Etude des mécanismes de production d'ions négatifs d'hydrogène (H-) et de deutérium (D-) en plasmas micro-ondes continu et pulsé par des diagnostics complémentaires." Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALI035.

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Les sources d'ions négatifs d'hydrogène font partie intégrante des accélérateurs modernes et des systèmes d'injection de neutres (NBI) dans les futurs réacteurs de fusion. Cette dernière application nécessite le développement de sources très puissantes et l'extension de leur fonctionnement au deutérium. De nombreuses activités de recherche sur des expériences à l'échelle du laboratoire ont été dédiées à ce sujet dans le but de comprendre les processus fondamentaux qui régissent la production d'ions négatifs. Les connaissances acquises ont essentiellement contribué au développement des sources
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Rander, Torbjörn. "Photoelectron Spectroscopy on Atoms, Molecules and Clusters : The Geometric and Electronic Structure Studied by Synchrotron Radiation and Lasers." Doctoral thesis, Uppsala University, Department of Physics, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-8343.

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<p>Atoms, molecules and clusters all constitute building blocks of macroscopic matter. Therefore, understanding the electronic and geometrical properties of such systems is the key to understanding the properties of solid state objects.</p><p>In this thesis, some atomic, molecular and cluster systems (clusters of O<sub>2</sub>, CH<sub>3</sub>Br, Ar/O<sub>2</sub>, Ar/Xe and Ar/Kr; dimers of Na; Na and K atoms) have been investigated using synchrotron radiation, and in the two last instances, laser light. We have performed x-ray photoelectron spectroscopy (XPS) on all of these systems. We have a
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Trabalhos de conferências sobre o assunto "Vaccum Ultraviolet absorption spectroscopy with synchrotron radiation"

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Yoshino, K., J. R. Esmond, W. H. Parkinson, et al. "Measurements of the Schumann-Runge Bands of O2 with VUV-FT Spectrometer and Synchrotron Radiation Source." In Fourier Transform Spectroscopy. Optica Publishing Group, 2022. http://dx.doi.org/10.1364/fts.1997.ftua.3.

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Current research on the Earth’s upper atmosphere requires molecular parameters of unprecedented detail and accuracy. State-of-the-art models of the vacuum-ultraviolet (VUV) absorbing properties of the atmosphere call for absorption cross sections with details on the scale of the Doppler linewidths (i.e., 0.1 to 0.15 cm−1 at 295 K). As a consequence, spectroscopic data at resolving powers of the order of 106 are needed. Current particular needs are for ultrahigh resolution absorption cross section data for some bands of NO and O2 in the UV to VUV region. To meet some of these requirements, we h
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Conradson, Steven D. "X-ray Absorption Spectroscopy of Elements of Z ≤ 10 Using a Free-EIectron Laser Source." In Free-Electron Laser Applications in the Ultraviolet. Optica Publishing Group, 1988. http://dx.doi.org/10.1364/fel.1988.wb5.

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Although X-ray Absorption Spectra (XAS) were first measured in the 1930’s, it was not until synchrotron radiation became available in the 1970’s that it became a feasible technique and the direct dependence of the XAS on the local structure of the absorbing element recognized. By a straightforward deconvolution, the Extended X-ray Absorption Fine Structure (EXAFS) region of the XAS provides the types and numbers of and distances to neighboring atoms within 3-4 Å of the selected absorber. In addition, transitions to bound and quasi-bound final states produce features in the X-ray Absorption Nea
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