FS-PETRA

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2020-01-08
13:24
OpenAccess [PUBDB-2020-00074] Journal Article
et al
Recoil-Induced Asymmetry of Nondipole Molecular Frame Photoelectron Angular Distributions in the Hard X-ray Regime
We investigate angular emission distributions of the 1s photoelectrons of N2 ionized by linearlypolarized synchrotron radiation at hν ¼ 40 keV. As expected, nondipole contributions cause a very strongforward-backward asymmetry in the measured emission distributions. [...]
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2020-01-08
13:19
OpenAccess [PUBDB-2020-00072] Journal Article
et al
Photon-Momentum-Induced Molecular Dynamics in Photoionization of $N_{2}$ at hν = 40 keV
We investigate K-shell ionization of N2 at 40 keV photon energy. Using a cold target recoil ionmomentum spectroscopy reaction microscope, we determine the vector momenta of the photoelectron, theAuger electron, and both Nþ fragments. [...]
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2020-01-02
09:51
[PUBDB-2020-00002] Journal Article
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Nanoscopic X-ray imaging and quantification of the iron cellular architecture within single fibroblasts of Friedreich's ataxia patients
Friedreich’s ataxia (FRDA) is a neurodegenerative disease characterized by an increase in intracytoplasmic iron concentration. Here the nanoscale irondistribution within single fibroblasts from FRDA patients was investigated usingsynchrotron-radiation-based nanoscopic X-ray fluorescence and X-ray in-lineholography at the ID16A nano-imaging beamline of the ESRF. [...]
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2019-12-10
08:38
OpenAccess [PUBDB-2019-04875] Report

Sachbericht 2016 [VH-VI-403]
[2016]
21 pp. () [10.3204/PUBDB-2019-04875]  GO
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2019-12-05
11:53
OpenAccess [PUBDB-2019-04778] Report

Final Report
[2017]
27 pp. () [10.3204/PUBDB-2019-04778]  GO
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2019-12-05
11:36
OpenAccess [PUBDB-2019-04772] Report

Sachbericht 2016 [VH-VI-403]
[2016]
21 pp. ()
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2019-11-11
22:09
OpenAccess [PUBDB-2019-04137] Journal Article
et al
Absorption spectra at the iodine 3d ionisation threshold following the $CH_{x}I^{+}$ ( x = 0–3) cation sequence
Yields of atomic iodine Iq+ (q Z 2) fragments resulting from photoexcitation and photoionisation of thetarget cations CHxI+ (x = 0–3) have been measured in the photon-energy range 610 eV to 670 eV,which comprises the threshold for iodine 3d ionisation. The measured ion-yield spectra show twostrong and broad resonance features due to the excitation of the 3d3/2,5/2 electrons into ef states similarto atomic iodine. [...]
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2019-10-17
12:39
Embargoed OpenAccess [PUBDB-2019-03704] Journal Article
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Mapping the Pore Architecture of Structured Catalyst Monoliths from Nanometer to Centimeter Scale with Electron and X-ray Tomographies
The hierarchical pore systems of Pt/Al2O3 exhaust gas aftertreatment catalysts were analyzed with a collection of correlative imaging techniques to monitor changes induced by hydrothermal aging. Synergistic imaging with laboratory X-ray microtomography, synchrotron radiation ptychographic X-ray computed nanotomography, and electron tomography allowed quantitative observation of the catalyst pore architecture from centimeter to nanometer scale. [...]
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2019-10-11
17:13
[PUBDB-2019-03662] Contribution to a conference proceedings
et al
Status of the PETRA IV project
10th International Particle Accelerator Conference, IPAC'19, MelbourneMelbourne, Australia, 19 May 2019 - 24 May 20192019-05-192019-05-24 JACoW Publishing, Geneva, Switzerland 1404-1407 () [10.18429/JACOW-IPAC2019-TUPGW011]  GO
Since 2016 DESY has been pursuing R towards upgrading its PETRA synchrotron light source to a fourth-generation machine, PETRA IV, which is expected to start operation in 2027. The conceptual design of a 6 GeV seven-bend-achromat-based lattice with an approx. [...]
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2019-10-10
14:21
OpenAccess [PUBDB-2019-03634] Journal Article
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Strain Mapping of CdTe Grains in Photovoltaic Devices
Strain within grains and at grain boundaries (GBs) in polycrystalline thin-film absorber layers limits the overall performance because of higher defect concentrations and band fluctuations. However, the nanoscale strain distribution in operational devices is not easily accessible using standard methods. [...]
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