FS-PET-S

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2020-02-11
10:40
[PUBDB-2020-00675] Journal Article
et al
Exploration of iron ligand modes in dimeric iron (II) complexes by nuclear resonance scattering
The vibronic properties of two dimeric iron (II) high-spin complexes [5CpFeX]2 (5Cp = Pentaisopropyl-cyclopentadienyl, X = OH-(1), Br-(2)) have been studied using nuclear inelastic scattering (NIS). In order to assign the experimentally observed bands to the particular modes, theoretical calculations using density functional theory (DFT) have been performed based on the structural data obtained by X-ray crystallography. [...]
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ddc:530
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2020-01-31
04:23
OpenAccess [PUBDB-2020-00622] Journal Article
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Photon Momentum Transfer in Single-Photon Double Ionization of Helium
We theoretically and experimentally investigate the photon momentum transfer in single-photon double ionization of helium at various large photon energies. We find that the forward shifts of the momenta along the light propagation of the two photoelectrons are roughly proportional to their fraction of the excess energy. [...]
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ddc:530
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2020-01-27
16:59
[PUBDB-2020-00565] Journal Article
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$\mathrm{Co_{9}S_{8}@carbon}$ yolk-shell nanocages as a high performance direct conversion anode material for sodium ion batteries
Cobalt sulfides based on conversion mechanisms are considered as promising anode materials for sodium-ion batteries due to their appropriate working voltage and high practical capacities. But the severe volume change and structure transformation make their cycle stability and rate capability unsatisfactory. [...]
ddc:624
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2020-01-15
15:00
OpenAccess [PUBDB-2020-00317] Journal Article
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Progress in HAXPES performance combining full-field k-imaging with time-of-flight recording
An alternative approach to hard-X-ray photoelectron spectroscopy (HAXPES) has been established. The instrumental key feature is an increase of the dimensionality of the recording scheme from 2D to 3D. [...]
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ddc:550
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2020-01-15
12:09
[PUBDB-2020-00295] Journal Article
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$^{61}$Ni Nuclear Forward Scattering Study of Magnetic Hyperfine Interactions in Double Perovskites $A_{2}NiMnO_{6}$ (A = Sc, In, Tl)
The relationship between hyperfine interactions, local structure, and magnetism in ordered double perovskites A2NiMnO6 (A = Sc, In, and Tl) is investigated by nuclear forward scattering with the 61Ni nuclear transition. Special attention is given to a quantitative determination of on-site and transferred hyperfine fields on the 61Ni nuclei. [...]
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ddc:530
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2020-01-15
12:05
DBCoverage [PUBDB-2020-00293] Report/Journal Article
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X-ray photon correlation spectroscopy of protein dynamics at nearly diffraction limited storage rings
[arXiv:1906.09102]
IUCrJ 6(5), 794 - 803 () [10.1107/S2052252519008273]  GO
This study explores the possibility to measure dynamics of proteins in solution using X-ray photon correlation spectroscopy (XPCS) at nearly diffraction limited storage rings (DLSR). We calculate the signal to noise ratio (SNR) of XPCS experiments from a concentrated lysozyme solution at the length scale of the hydrodynamic radius of the protein molecule. [...]
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ddc:530
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2020-01-15
11:58
[PUBDB-2020-00291] Journal Article
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Vibrational properties and cooperativity of the 3D spin crossover network $\mathrm{[Fe(pyrazine)][Pt(CN)_{4}]}$
Dalton transactions 48(41), 15625 - 15634 () [10.1039/C9DT02139F]  GO
Nuclear inelastic scattering of synchrotron radiation has been used to determine the phonon density of vibrational states (pDOS) for the high-spin and low-spin phases of the hydrated and dehydrated isomer of the spin crossover polymer [Fe(pyrazine)][Pt(CN)4]. Density functional theory calculations have been performed for molecular models of the 3D polymeric system. [...]
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ddc:540
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2020-01-14
15:13
OpenAccess [PUBDB-2020-00236] Journal Article
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Understanding the Li-ion storage mechanism in a carbon composited zinc sulfide electrode
Sulfide compounds are interesting conversion electrode materials for Li-ion batteries, due to their hightheoretical capacity. However, they suffer from large volumetric changes and fast capacity fading. [...]
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ddc:530
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2020-01-14
15:00
OpenAccess [PUBDB-2020-00228] Journal Article
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Hard-X-Ray Spectroscopy with a Spectrographic Approach
Hard-x-ray spectroscopy relies on a suite of modern techniques for studies of vibrational, electronic, andmagnetic excitations in condensed matter. At present, the energy resolution of these techniques can beimproved only by decreasing the spectral window of the involved optics—monochromators and analyzers—thereby sacrificing the intensity. [...]
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ddc:530
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2020-01-14
14:48
DBCoverage [PUBDB-2020-00221] Journal Article
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High-resolution hard-x-ray photoelectron diffraction in a momentum microscope—the model case of graphite
Hard x-ray photoelectron diffraction (hXPD) patterns recorded with a momentum microscope withhigh k-resolution (0.025 Å−1 equivalent to an angular resolution of 0.034° at 7 keV) revealunprecedented rich fine structure.Wehave studied hXPD of theC1s core level in the prototypicallow-Z material Graphite at 20 photon energies between 2.8 and 7.3 keV. Sharp bright and dark linesshift with energy; regions of Kikuchi band crossings near zone axis exhibit a filigree structure whichvaries rapidly with energy. [...]
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ddc:370
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