A5110251192- Nuclear Physics and Applications
- Rare-earth and actinide compounds
- Material Dynamics and Properties
- Magnetic properties of thin films
- Atomic and Subatomic Physics Research
- Metallic Glasses and Amorphous Alloys
- Polymer crystallization and properties
- Catalytic Processes in Materials Science
- Rheology and Fluid Dynamics Studies
- Microstructure and mechanical properties
- Magnetic Properties of Alloys
- Aortic aneurysm repair treatments
- Electrostatics and Colloid Interactions
- Advanced Condensed Matter Physics
- High-pressure geophysics and materials
- Cardiac, Anesthesia and Surgical Outcomes
- demographic modeling and climate adaptation
- Orbital Angular Momentum in Optics
- Advanced Physical and Chemical Molecular Interactions
- Aortic Disease and Treatment Approaches
- Polymer Nanocomposites and Properties
- Near-Field Optical Microscopy
- Microstructure and Mechanical Properties of Steels
- Phase Equilibria and Thermodynamics
- Renal and Vascular Pathologies
European Spallation Source
2012-2020
Aarhus University
2020
Université Grenoble Alpes
2020
Centre National de la Recherche Scientifique
2020
Institut Néel
2020
Institut Langevin
2014
L3S Research Center
2008-2013
Max Planck Society
2010
Art Research Centre of the Slovak Academy of Sciences
2009
University of Liverpool
2007
An overview is provided of the 15 neutron beam instruments making up initial instrument suite European Spallation Source (ESS), and being made available to user community. The ESS source consists a high-power accelerator target station, providing unique long-pulse time structure slow neutrons. design considerations behind structure, moderator geometry layout are presented. 15-instrument two small-angle instruments, reflectometers, an imaging beamline, single-crystal diffractometers; one for...
We present neutron scattering data on the structure and dynamics of melts from polyethylene oxide rings with molecular weights up to ten times entanglement mass linear counterpart. The reveal a very compact conformation displaying approaching fractal, as hypothesized by recent simulation work. is characterized fast Rouse relaxation subunits (loops) slower lattice animal-like loop displacement. size an intrinsic property ring architecture independent weight. This first experimental...
We have studied the motion of polyhedral oligomeric silsesquioxane (POSS) nanoparticles modified with poly(ethylene glycol) (PEG) arms immersed in PEG matrices different molecular weight. Employing neutron spin echo spectroscopy combination pulsed field gradient (PFG) NMR we found following. (i) For entangled center mass mean square displacement (MSD) PEG-POSS particles is subdiffusive following a t^{0.56} power law. (ii) The diffusion coefficient as well crossover to Fickian independent...
We report on magnetic-field–dependent small-angle neutron scattering (SANS) experiments nanocrystalline inert-gas condensed bulk Gd, which was synthesized using the low-capturing isotope 160Gd. The angular dependency of cross-section is in very good agreement with recent theoretical predictions. Rather unexpected for this type material, we observe a clover-leaf–shaped anisotropy SANS signal, origin attributed to existence longitudinal magnetization fluctuations associated atomic site...
The relaxation time spectrum in blends of architecturally different polymers with strongly disperse scales has been investigated by their time-dependent small angle neutron scattering signal after a fast uniaxial step strain. Model-hyperbranched dendrimeric second generation, dilutely dispersed within linear homopolymer matrices, acted like sensitive probes for structurally, though not firmly, established features the tube model bidisperse melts. We showed that equilibration matrix...
Rather dilute mixtures of oppositely charged polyelectrolyte and surfactant can form highly viscous solutions for an excess charges present, with viscosities up to 4 orders magnitude above the pure solution. These changes in macroscopic behavior should originate from mesoscopic properties. Therefore, structure dynamics such mixtures, namely JR 400 SDS (h- or d-SDS) have been investigated using small-angle neutron scattering (SANS) neutron-spin echo (NSE), where contrast matching allows...
Based on experimental magnetic-field-dependent neutron scattering data, we have calculated the autocorrelation function of spin misalignment nanocrystalline (160)gadolinium. The analysis suggests existence two characteristic length scales in system: smaller one is about 5 nm and attributed to defect cores grain boundaries, whereas larger scale order average crystallite size D = 21 presumably describes response magnetization magnetic anisotropy field individual crystallites.
We report magnetization and magnetic neutron scattering measurements on nanocrystalline Fe which was prepared by means of the inert-gas condensation technique. Depending compaction pressure applied during synthesis procedure (0.5–1.8 GPa), resulting samples contain porosity with volume fractions between about 20–35%. provide evidence that spin disorder is associated has a strong influence properties, it gives rise to characteristic clover-leaf–shaped angular anisotropy in...
The early stages of precipitate formation in Fe-25at% Co-9at% Mo at 500 °C was investigated by situ small-angle neutron scattering (SANS). ratio magnetic to nuclear SANS intensity, which depends on the composition, and sizes were analyzed. results suggest that Fe-Co-Mo alloy an initial stage with strong compositional changes is completed after 150 s, when full signal established. For comparison, well-known nucleation growth reaction Fe-1at% Cu studied. Differences rate mean size developing...
Abstract The following abstracts are from the papers presented at 35th Annual Scientific Meeting of Vascular Surgical Society Great Britain and Ireland, held in Brighton, UK on 7–9 November 2001. President Society, Mr R. N. Baird, was Chair.
Since their invention just over 20 years ago, optical traps have emerged as a powerful tool with broad-reaching applications in biology, physics and now potentially engineering. Capabilities evolved from simple manipulation to the application of calibrated forces on—and measurement nanometer-level displacements optically trapped objects. The newly formed North West Laser Engineering Consortium (NWLEC), strategic alliance between Universities Liverpool Manchester England UK, has an ongoing...