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2024-11-28
13:05
[IMPULSE-2024-00199] Journal Article
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From structure to electrochemistry: the influence of transition metal ordering on Na$^{+}$ /vacancy orderings in P2-type Na$_{x}$MO$_{2}$ cathode materials for sodium-ion batteries
P2-type layered oxides are attractive cathode active materials for sodium-ion batteries, however, these materials typically suffer from detrimental Na+/vacancy orderings. In this work, we investigate the origin as well as the influence of the transition metal ratio on Na+/vacancy orderings in P2-type cathode materials. [...]
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2024-10-23
13:55
[IMPULSE-2024-00185] Contribution to a conference proceedings/Contribution to a book
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Results from the First Neutron Reflectometry Application of a Fast Photon-Counting Camera
2024 IEEE Nuclear Science Symposium (NSS), Medical Imaging Conference (MIC) and Room Temperature Semiconductor Detector Conference (RTSD) : [Proceedings] - IEEE, 2024. - ISBN 979-8-3503-8815-2 - doi:10.1109/NSS/MIC/RTSD57108.2024.10655497
2024 IEEE Nuclear Science Symposium (NSS), Medical Imaging Conference (MIC) and Room Temperature Semiconductor Detector Conference (RTSD), TampaTampa, FL, 26 Oct 2024 - 2 Nov 20242024-10-262024-11-02
IEEE () [10.1109/NSS/MIC/RTSD57108.2024.10655497]
A detector based on Timepix3 readout of image- intensified light from a scintillator has been applied and tested in neutron reflectometry for the first time. The detector has been characterized at a monochromatic beamline with λ = 4.2A ̊ at HFIR reactor at ORNL. [...]
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2024-10-23
13:49
[IMPULSE-2024-00184] Preprint
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LumaCam: A Novel Class of Position-Sensitive Event Mode Particle Detectors using Scintillator Screens
A new type of position-sensitive detectors is gaining attention in the neutron community. They are scintillator based detectors that detect the scintillation light on an individual photon basis via an image intensifier and a fast image sensor. [...]
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2024-10-16
14:35
[IMPULSE-2024-00179] Journal Article
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T aillefer —A Tool for Sensitivity Analysis and Uncertainty Propagation Studies for Steady-State Thermal-Hydraulic Simulations of Involute Fuel Element Research Reactors
Taillefer is a versatile Python tool for carrying out Sensitivity Analysis (SA) and uncertainty propagation (UP) studies based on Monte Carlo sampling. Developed with the primary goal of investigating sensitivities and uncertainties of steady-state thermal-hydraulic (SSTH) safety parameters of the high-performance research reactors Forschungs Neutronenquelle Heinz Maier-Leibnitz (FRM II) in Garching, Germany, and the Réacteur à Haut Flux (RHF) in Grenoble, France, it can also be used for a large variety of other modeling problems.The work presented here aims to explain the underlying mathematical background of SA and UP studies with Taillefer and to show some steps to verify these routines. [...]
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2024-09-06
09:22
[IMPULSE-2024-00151] Journal Article
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Investigation of the Structure and Properties of Magnetic Nanopowders of Magnetite–Maghemite Solid Solutions by SAPNS
Nanopowders of the magnetite–maghemite series have been synthesized by coprecipitation from aqueous solutions and by the sol–gel method, and a comparative comprehensive study of their structure has been carried out using X-ray diffraction analysis, scanning electron microscopy, low-temperature nitrogen adsorption, and small-angle polarized neutron scattering. It has been established that the resulting iron oxide nanopowders are porous systems that, depending on the synthesis method, have a one-level, two-level (for powders obtained by aqueous synthesis), or three-level (for powders obtained by the sol–gel method) hierarchical structure organization with different scales and different types of aggregation for each of the structural levels, and the characteristic size for the larger level in both cases is >45 nm [...]
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2015-03-09
14:50
[IMPULSE-2015-00153] Conference Presentation (Other)
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On the Development of Fast Neutron PGAA at FRM II, Garching
25th Seminar on Activation Analysis and Gamma Spectroscopy (SAAGAS), AachenAachen, Germany, 23 Feb 2015 - 25 Feb 20152015-02-232015-02-25
Prompt Gamma Activation Analysis (PGAA) is apowerful non-destructive assay for toxic elementssuch as Cd, Hg or Pb in radioactive packages [1,2]. Inparticular, for long-lived actinides, e.g [...]

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2015-03-06
15:53
[IMPULSE-2015-00148] Contribution to a conference proceedings

In-pile irradiated U-Mo/Al(Si) dispersed nuclear fuel behaviour under thermal annealing: fission gas release and microstructural evolutions
Research Reactor Fuel Management (RRFM), LjubljanaLjubljana, Slovenia, 30 Mar 2014 - 3 Apr 20142014-03-302014-04-03 12 pp. ()
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2014-10-17
13:51

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2014-10-17
13:51

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2014-10-17
13:50
Dissertation / PhD Thesis

Messung von Fermiflächen von korrelierten Elektronensystemen mittels ACAR
Lehrstuhl für Experimentalphysik E21, Technische Universität München, Diss., 0

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