Fermionic condensation in ultracold atoms, nuclear matter and neutron stars [PDF]
J. Phys. Conf. Ser. 497, 012026 (2014), 2013 We investigate the Bose-Einstein condensation of fermionic pairs in three different superfluid systems: ultracold and dilute atomic gases, bulk neutron matter, and neutron stars. In the case of dilute gases made of fermionic atoms the average distance between atoms is much larger than the effective radius of the inter-atomic potential.
Salasnich, Luca
arxiv +3 more sources
Constraints on a possible dineutron state from pionless EFT [PDF]
, 2014 We investigate the sensitivity of the three-nucleon system to changes in the neutron-neutron scattering length to next-to-leading order in the pionless effective field theory, focusing on the the triton-3He binding energy difference and neutron-deuteron elastic scattering. Due to the appearance of an electromagnetic three-body counterterm at this order,
Hammer, H. W., König, Sebastian
arxiv +5 more sources
A database of synthetic inelastic neutron scattering spectra from molecules and crystals [PDF]
Scientific Data, 2023 Inelastic neutron scattering (INS) is a powerful tool to study the vibrational dynamics in a material. The analysis and interpretation of the INS spectra, however, are often nontrivial.
Yongqiang Cheng +2 more
doaj +2 more sources
Inelastic neutron scattering peak in Zn substituted YBa2Cu3O7 [PDF]
, 1999 The effects of nonmagnetic impurities on the neutron scattering intensity are studied for a model of the copper oxide layers in the normal state. The contribution to the Q=(pi,pi) neutron scattering intensity from processes involving the scattering of the spin fluctuations from an impurity with large momentum transfers are calculated within the random ...
Bulut +5 more
arxiv +3 more sources
MCViNE -- An object oriented Monte Carlo neutron ray tracing simulation package [PDF]
, 2015 MCViNE (Monte-Carlo VIrtual Neutron Experiment) is a versatile Monte Carlo (MC) neutron ray-tracing program that provides researchers with tools for performing computer modeling and simulations that mirror real neutron scattering experiments. By adopting modern software engineering practices such as using composite and visitor design patterns for ...
Abernathy, Douglas L. +8 more
arxiv +5 more sources
Neutron scattering and neural-network quantum molecular dynamics investigation of the vibrations of ammonia along the solid-to-liquid transition [PDF]
Nature CommunicationsVibrational spectroscopy allows us to understand complex physical and chemical interactions of molecular crystals and liquids such as ammonia, which has recently emerged as a strong hydrogen fuel candidate to support a sustainable society.
T. M. Linker +9 more
doaj +2 more sources
Integrated edge-to-exascale workflow for real-time steering in neutron scattering experiments [PDF]
Structural DynamicsWe introduce a computational framework that integrates artificial intelligence (AI), machine learning, and high-performance computing to enable real-time steering of neutron scattering experiments using an edge-to-exascale workflow.
Junqi Yin +12 more
doaj +2 more sources
Determining the relaxation time from a temperature-dependent scan of the neutron spin-echo signal amplitude [PDF]
EPJ Web of Conferences, 2022 Temperature-dependent scans of the neutron scattering intensity are commonly employed in high energy-resolution quasielastic measurements. Besides serving as a useful diagnostic tool for identifying the temperature range that could give rise to a ...
Mamontov Eugene, Zolnierczuk Piotr
doaj +1 more source
Machine Learning on Neutron and X-Ray Scattering [PDF]
, 2021 Neutron and x-ray scattering represent two classes of state-of-the-art materials characterization techniques that measure materials structural and dynamical properties with high precision.
Zhantao Chen +10 more
semanticscholar +1 more source
The high-Q static scattering of 3-methyl pyridine/D2O mixtures without and with antagonistic salt [PDF]
EPJ Web of Conferences, 2023 Here we focus on the high-Q small-angle neutron scattering where we observed deviations from an ideal power law Q−2. From theory, this deviation Δ arises from the critical correlation-function exponent ηd in d dimensions.
Frielinghaus Henrich +9 more
doaj +1 more source