Results 101 to 110 of about 1,374,496 (201)

Magnetic Structure of the High‐TN Antiferromagnet La0.5Sr3.5Fe3O7.5F2.6: A Temperature‐Dependent Mößbauer Spectroscopy and Neutron Diffraction Study

Zeitschrift für anorganische und allgemeine Chemie, EarlyView.
La0.5Sr3.5Fe3O7.5F2.6, a rare n = 3 Ruddlesden–Popper oxyfluoride, exhibits robust antiferromagnetism across a wide temperature range from 1.7 to 470 K. Temperature‐dependent neutron diffraction reveals an orthorhombic nuclear and a monoclinic magnetic structure, while Mößbauer spectroscopy shows persistent short‐range magnetic order up to 525 K.
Andy Bivour, Jonas Jacobs, Roberto Köferstein, Florian Daumann, Gerald Hörner, Birgit Weber, Clemens Ritter, Walter Schnelle, Claudia Felser, Stefan G. Ebbinghaus   +9 more
wiley   +1 more source

Current Mode Neutron Noise Measurements in the Zero Power Reactor CROCUS

EPJ Web of Conferences, 2018
The present article is an overview of developments and results regarding neutron noise measurements in current mode at the CROCUS zero power facility. Neutron noise measurements offer a non-invasive method to determine kinetic reactor parameters such as ...
Pakari O., Lamirand V., Perret G., Braun L., Frajtag P., Pautz A.   +5 more
doaj   +1 more source

Bridging the small‐angle X‐ray scattering–X‐ray diffraction gap in disordered layered materials: the CLADIFFMOD unified framework

Journal of Applied Crystallography, EarlyView.
A unified multi‐scale framework is proposed for the consistent analysis of small‐angle X‐ray scattering (SAXS) and X‐ray diffraction (XRD) in disordered clay minerals, combining morphology, stacking and turbostratic contributions within a single formalism.
Walid Oueslati
wiley   +1 more source

Simultaneous very small angle and small‐angle neutron scattering measurements enabled by flat‐panel‐type photomultiplier detectors at SANS‐J, JRR‐3

Journal of Applied Crystallography, EarlyView.
Replacing conventional position‐sensitive photomultiplier tube detector systems with a square array of four flat‐panel‐type photomultiplier tube detectors enables simultaneous very small angle and small‐angle neutron scattering measurements, while improving the effective neutron detection area, spatial resolution, sensitivity and signal‐to‐background ...
Miki Sasaki, Rintaro Nakabe, Takayuki Kumada, Ryuhei Motokawa   +3 more
wiley   +1 more source

Dynamical refinement against 3D‐ED data in Olex2–AutoChem using the N‐Beam approach

Journal of Applied Crystallography, EarlyView.
Dynamical diffraction effects in electron diffraction can now be modelled directly within Olex2–AutoChem using data processed with CrysAlisPro, enabled by a new N‐Beam refinement method based on the Bloch‐wave formalism. This workflow allows dynamical refinement of integrated rotation electron diffraction intensities, improving structural models and ...
Oleg Dolomanov, Grzegorz Próchniak, Przemysław Steć, Mathias Meyer, Horst Puschmann   +4 more
wiley   +1 more source

From analytical to data‐driven: multi‐method optimization of a bendable mirror system for dynamic focusing

Journal of Synchrotron Radiation, EarlyView.
A small‐radius‐of‐curvature bendable mirror system is developed for dynamic focusing in X‐ray free‐electron laser and synchrotron radiation beamlines, and a transfer‐learning neural‐network and differential‐evolution framework is used for force‐to‐shape modeling and inverse optimization.
Baoning Sun, Zhixiang Wen, Qinghao Zhu, Jun Luo, Tairong Xu, Lingfeng Zhu, Yaxiang Liang, Jitao Sun, Zhuo Li, Shun Xia, Zhongmin Xu, Meiyi Wu, Qinming Li, Weiqing Zhang, Xueming Yang   +14 more
wiley   +1 more source

NEUTRON NOISE CALCULATIONS IN THREE-DIMENSIONAL SYSTEMS

, 2011
In this paper, the neutron noise, i.e. the stationary fluctuations of the neutron flux around its mean value, is calculated in three dimensions and two energy groups using diffusion theory.
Larsson, Viktor, Demaziere, Christophe
core   +1 more source

Real-time organic scintillator neutron spectrum unfolding using a deep learning approach and data generated from TRIASSIC and MCNP

Nuclear Engineering and Technology
Under harsh operating conditions of a demonstration fusion power plant (DEMO) with high neutron fluxes, neutron diagnostics can provide a map of core plasma conditions.
Beomkyu Kwon, Junsang Hwang, Jaehyo Kim, Ill-Hyuk Han, Soobin Lim, Rin Choi, Mun Seong Cheon, Yong-Su Na, Jong-Kyu Park, Geehyun Kim   +9 more
doaj   +1 more source

Crystallography of organic energetic materials: thermoelastic properties and equation of state

Acta Crystallographica Section B, EarlyView.
Thermoelastic properties and equation‐of‐state parameters of 16 organic energetic molecular crystals are systematically compiled and compared from temperature‐ and pressure‐dependent crystallographic data. The analysis highlights anisotropic thermal expansion and compressibility and identifies structural factors governing the mechanical response of ...
Mathieu Guerain
wiley   +1 more source

One‐more‐vertex Next‐Event Estimation with Hierarchical Geometry Sampling

Computer Graphics Forum, EarlyView.
Abstract Robust next‐event estimation (NEE) remains a challenge in scenes characterized by sparse or small‐scale geometry where indirect illumination is the primary transport mechanism. In these scenes, traditional path construction, which relies on local directional sampling, often fails to find intersections with the sparse geometry, and standard NEE
Jorge Garcia‐Pueyo, Nestor Monzon, Adrian Jarabo, Adolfo Muñoz   +3 more
wiley   +1 more source