Results 81 to 90 of about 86,100 (274)

Critical dynamics of a spin-5/2 2D isotropic antiferromagnet

open access: yes, 2001
We report a neutron scattering study of the dynamic spin correlations in Rb$_2$MnF$_4$, a two-dimensional spin-5/2 antiferromagnet. By tuning an external magnetic field to the value for the spin-flop line, we reduce the effective spin anisotropy to ...
A. Auerbach   +25 more
core   +1 more source

A note on quasielastic neutron scattering

open access: yesJournal de Physique I, 1994
We present a theorem that in coherent quasielastic neutron scattering on a confined and limited system of identical particles only the configuration-configuration correlations have to be examined without any hindsight on the distribution of the particles inside the configuration.
openaire   +2 more sources

Theoretical study of lepton events in the atmospheric neutrino experiments at SuperK

open access: yes, 2009
Super-Kamiokande has reported the results for the lepton events in the atmospheric neutrino experiment. These results have been presented for a 22.5kT water fiducial mass on an exposure of 1489 days, and the events are divided into sub-GeV, multi-GeV and
A. Bandyopadhyay   +114 more
core   +1 more source

Quasielastic Neutron Scattering Study on Polymer Nanocomposites

open access: yesJournal of Physics: Conference Series, 2014
By using a quasielastic neutron scattering technique (disk-chopper-type spectrometer AMATERAS at J-PARC), we have investigated the microscopic dynamics of polybutadiene (PB) in which silica particles were embedded. The experimental results gave us both a damped vibration mode of PB and jumped diffusion motion of the segments.
T Masui   +6 more
openaire   +1 more source

Probing the Structure and Dynamics of the [NH4]M(HCO2)3 Ferroelectric Phases: Dielectric Relaxation through Orientational Disorder†

open access: yesChinese Journal of Chemistry, Volume 43, Issue 10, Page 1190-1198, 15 May 2025.
The polar [NH4]M(HCO2)3 frameworks exhibit dielectric relaxation due to orientational disorder of the NH4, as identified by a multi‐technique examination of their structure and dynamics. Comprehensive Summary Neutron diffraction studies of the low‐temperature relaxor ferroelectric phases of [NH4]M(HCO2)3, where M = Mn2+ and Zn2+, show that a third of ...
Thomas J. Hitchings   +7 more
wiley   +1 more source

QENS investigation of proton confined motions in hydrated perfluorinated sulfonic membranes and self-assembled surfactants

open access: yesEPJ Web of Conferences, 2015
We report on QuasiElastic Neutron Scattering (QENS) investigations of the dynamics of protons and water molecules confined in nanostructured perfluorinated sulfonic acid (PFSA) materials, namely a commercial Aquivion membrane and the perfluorooctane ...
Berrod Quentin   +5 more
doaj   +1 more source

Scattering fingerprints of two-state dynamics

open access: yesNew Journal of Physics, 2022
Particle transport in complex environments such as the interior of living cells is often (transiently) non-Fickian or anomalous, that is, it deviates from the laws of Brownian motion.
Cai Dieball   +3 more
doaj   +1 more source

Suppression of hidden order in URu2Si2 under pressure and restoration in magnetic field

open access: yes, 2009
We describe here recent inelastic neutron scattering experiments on the heavy fermion compound URu2Si2 realized in order to clarify the nature of the hidden order (HO) phase which occurs below T_0 = 17.5 K at ambient pressure.
A Villaume   +15 more
core   +2 more sources

A Precise Measurement of the Neutron Magnetic Form Factor GMn in the Few-GeV2 Region [PDF]

open access: yes, 2008
The neutron elastic magnetic form factor GMn has been extracted from quasielastic electron scattering data on deuterium with the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab.
Adams, G.   +269 more
core   +4 more sources

IR Spectroscopic Studies on Water Confined in an Isoreticular MOF Series–Influence of the Metal and Linker Functionality

open access: yesAdvanced Materials Interfaces, Volume 12, Issue 10, May 19, 2025.
Mono‐ and bimetallic isoreticular MOF‐74 analogs with different ratios of Mg2+ and Ni2+ and linkers of different sizes and functionalities are synthesized and loaded with water. With the help of IR spectroscopy, semiquantitative conclusions are drawn regarding the prevalence of differently ordered water species in dependence on the confinement and ...
Tabea C. V. Haug   +4 more
wiley   +1 more source

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