Auswahl der wissenschaftlichen Literatur zum Thema „Vaccum Ultraviolet absorption spectroscopy with synchrotron radiation“
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Zeitschriftenartikel zum Thema "Vaccum Ultraviolet absorption spectroscopy with synchrotron radiation"
Aiura, Yoshihiro, Kenichi Ozawa, Kazuhiko Mase, Makoto Minohara und 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, Nr. 4 (19.06.2020): 923–33. http://dx.doi.org/10.1107/s1600577520006712.
Der volle Inhalt der QuelleKooser, Kuno, Antti Kivimäki, Paavo Turunen, Rainer Pärna, Liis Reisberg, Marco Kirm, Mika Valden, Marko Huttula und Edwin Kukk. „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, Nr. 4 (22.06.2020): 1080–91. http://dx.doi.org/10.1107/s1600577520007146.
Der volle Inhalt der QuelleMendes, Mónica, Fábris Kossoski, Ana I. Lozano, João Pereira-da-Silva, Rodrigo Rodrigues, João Ameixa, Nykola C. Jones, Søren V. Hoffmann und Filipe Ferreira da Silva. „Excited States of Bromopyrimidines Probed by VUV Photoabsorption Spectroscopy and Theoretical Calculations“. International Journal of Molecular Sciences 22, Nr. 12 (16.06.2021): 6460. http://dx.doi.org/10.3390/ijms22126460.
Der volle Inhalt der QuelleUbachs, W., E. J. Salumbides, M. T. Murphy, H. Abgrall und E. Roueff. „H2/HD molecular data for analysis of quasar spectra in search of varying constants“. Astronomy & Astrophysics 622 (Februar 2019): A127. http://dx.doi.org/10.1051/0004-6361/201834782.
Der volle Inhalt der QuelleRay, 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.
Der volle Inhalt der QuelleDe Angelis, Dario, Luca Longetti, Gabriele Bonano, Jacopo Stefano Pelli Cresi, Laura Foglia, Matteo Pancaldi, Flavio Capotondi et al. „A sub-100 nm thickness flat jet for extreme ultraviolet to soft X-ray absorption spectroscopy“. Journal of Synchrotron Radiation 31, Nr. 3 (09.04.2024). http://dx.doi.org/10.1107/s1600577524001875.
Der volle Inhalt der QuelleKumar, S., D. Duflot, N. C. Jones, S. V. Hoffmann, G. García und P. Limão-Vieira. „The electronic structure of 2(5H)-thiophenone investigated by vacuum ultraviolet synchrotron radiation and theoretical calculations“. European Physical Journal D 77, Nr. 11 (November 2023). http://dx.doi.org/10.1140/epjd/s10053-023-00771-w.
Der volle Inhalt der QuelleNakazawa, Ryotaro, Atsushi Matsuzaki, Kohei Shimizu, Ikuko Nakamura, Emi Kawashima, Seiji Makita, Kiyohisa Tanaka et al. „Reliable measurement of the density of states including occupied in-gap states of an amorphous In–Ga–Zn–O thin film via photoemission spectroscopies: Direct observation of light-induced in-gap states“. Journal of Applied Physics 135, Nr. 8 (23.02.2024). http://dx.doi.org/10.1063/5.0185405.
Der volle Inhalt der QuellePankratova, Viktorija, Anna P. Kozlova, Oleg A. Buzanov, Kirill Chernenko, Roman Shendrik, Anatolijs Šarakovskis und Vladimir Pankratov. „Time-resolved luminescence and excitation spectroscopy of Co-doped Gd3Ga3Al2O12 scintillating crystals“. Scientific Reports 10, Nr. 1 (23.11.2020). http://dx.doi.org/10.1038/s41598-020-77451-x.
Der volle Inhalt der QuelleGonçalves Jr, Sérgio J., Heitor Evangelista, Johannes Weis, Tristan H. Harder, Swarup China, Simon Müller, Magdalena M. Marques et al. „Stratospheric ozone depletion in the Antarctic region triggers intense changes in sea salt aerosol geochemistry“. Communications Earth & Environment 4, Nr. 1 (16.03.2023). http://dx.doi.org/10.1038/s43247-023-00739-z.
Der volle Inhalt der QuelleDissertationen zum Thema "Vaccum Ultraviolet absorption spectroscopy with synchrotron radiation"
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.
Der volle Inhalt der QuelleHydrogen negative ion sources are integral components in modern accelerator facilities and in the Neutral Beam Injection (NBI) systems of future fusion reactors. The latter application necessitates the development of such very powerful sources and the extension of their operation to deuterium. Numerous research activities on laboratory-scale experiments have been devoted to this subject aiming at understanding the fundamental processes that govern negative ion production. The gained knowledge has contributed essentially to the development of the prototype sources that will be employed in the NBI system of ITER, the largest Tokamak reactor under construction which is foreseen to demonstrate the potential of exploitation of thermonuclear fusion as an alternative source of energy. Nonetheless, there are important technological issues arising from the fundamental physics underlying these sources which need to be overcome in order for them to be able to deliver neutral beams with characteristics satisfying the baseline requirements.In the present thesis, the production of hydrogen (H-) and deuterium (D-) negative ions is studied in Electron Cyclotron Resonance (ECR) driven plasmas. In particular, experimental studies have been carried out in two reactors of similar characteristics, namely “Prometheus I” and “SCHEME-II+”, by means of conventional and state-of-the-art diagnostic techniques tailored to investigate the macroscopic and atomic properties of the plasmas of the two isotopes. In these reactors, negative ion production is based on the so-called volume production mechanism. In this case, the Dissociative Electron Attachment (DEA) reaction is identified as the predominant one. Understanding those factors which influence this reaction may lead to its control and thus an even better control of the negative ion production.In the “Prometheus I” reactor, parametric studies in hydrogen and deuterium plasmas as a function of the supplied microwave power and working gas pressure reveal the existence of optima for negative ion production and allow the identification of isotopic differences. The negative ion yield reaches a value of 0.57×10^16 m^(-3 ) in both plasmas, although in the hydrogen case the ratio of the negative ions to the plasma density is consistently higher than in the case of deuterium. Indicatively, a ratio of 0.225 in H2 versus 0.125 in D2 is observed in representative operating conditions. Measurements, moreover, of the negative ion energies disclose the existence of two ionic populations of different energies. This has been attributed to the two main mechanisms leading to the excitation of molecules in high vibrational/rotational states, which in turn participate in the formation of negative ions via the DEA reaction.On the other hand, the “SCHEME-II+” reactor is intended for studies of the influence of various materials exposed to the produced plasma on the production of the highly ro-vibrationally excited molecules. An advanced spectroscopic diagnostic technique, Vacuum Ultraviolet Fourier Transform (VUV-FT) absorption spectroscopy using synchrotron radiation, is utilized in order to directly probe these species under different plasma operating conditions. The significant positive effect of metallic surfaces on the creation of these species is demonstrated, since a nearly fourfold increase of deuterium molecules in high vibrational states (v"= 4-8) is observed when the plasma faces a tantalum surface as opposed to a Quartz surface.Finally, deuterium plasmas sustained in the pulsed mode of operation are investigated. Time-resolved measurements of the basic plasma parameters, performed in plasma pulses lying in the kHz range, reveal important post-plasma effects. In particular, a higher negative ion yield with respect to that measured in a plasma sustained in the continuous mode of operation has been observed
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.
Der volle Inhalt der QuelleAtoms, 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.
In this thesis, some atomic, molecular and cluster systems (clusters of O2, CH3Br, Ar/O2, 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 also applied ultraviolet photoelectron spectroscopy (UPS), resonant Auger spectroscopy (RAS) and near-edge x-ray absorption spectroscopy (NEXAFS) to study many of the systems. Calculations using ab initio methods, namely density functional theory (DFT) and Møller-Plesset perturbation theory (MP), were employed for electronic structure calculations. The geometrical structure was studied using a combination of ab initio and molecular dynamics (MD) methods.
Results on the dissociation behavior of CH3Br and O2 molecules in clusters are presented. The dissociation of the Na2 molecule has been characterized and the molecular field splitting of the Na 2p level in the dimer has been measured. The molecular field splitting of the CH3Br 3d level has been measured and the structure of CH3Br clusters has been determined to be similar to the structure of the bulk solid. The diffusion behavior of O2, Kr and Xe on large Ar clusters, as a function of doping rate, has been investigated. The shake-down process has been observed from excited states of Na and K. Laser excited Na atoms have been shown to be magnetically aligned. The shake-down process was used to characterize the origin of various final states that can be observed in the spectrum of ground-state K.
Konferenzberichte zum Thema "Vaccum Ultraviolet absorption spectroscopy with synchrotron radiation"
Yoshino, K., J. R. Esmond, W. H. Parkinson, A. P. Thorne, L. E. Murray, G. Cox, R. C. M. Learner et al. „Measurements of the Schumann-Runge Bands of O2 with VUV-FT Spectrometer and Synchrotron Radiation Source“. In Fourier Transform Spectroscopy. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/fts.1997.ftua.3.
Der volle Inhalt der QuelleConradson, 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. Washington, D.C.: Optica Publishing Group, 1988. http://dx.doi.org/10.1364/fel.1988.wb5.
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