Results 41 to 50 of about 28,258 (199)

Inelastic and quasi-elastic neutron scattering. Application to soft-matter

EPJ Web of Conferences, 2018
Microscopic dynamical events control many of the physical processes at play in condensed matter: transport, magnetism, catalysis and even function of biological assemblies.
Berrod Quentin, Lagrené Karine, Ollivier Jacques, Zanotti Jean-Marc   +3 more
doaj   +1 more source

Dynamics of cubic-tetragonal phase transition in KNbO$_3$ perovskite

, 2004
The low-energy part of the vibration spectrum in KNbO$_3$ was studied by cold neutron inelastic scattering in the cubic phase. In addition to acoustic phonons, we observe strong diffuse scattering, which consists of two components. The first one is quasi-
A. A. Maradudin, A. C. Nunes, A. Choubey, A. D. Bruce, B. Fåk, B. Roessli, G. A. Smolenskii, G. J. Coombs, G. Shirane, M. D. Fontana, M. E. Lines, M. Holma, M. Popovichi, P. Günter, R. A. Cowley, R. Comes, R. K. Wehner, S. G. Lushnikov, S. N. Gvasaliya, S. Triebwasser, V. K. Yanovskii   +20 more
core   +1 more source

Solvent contribution to the stability of a physical gel characterized by quasi-elastic neutron scattering [PDF]

, 2015
The dynamics of a physical gel, namely the Low Molecular Mass Organic Gelator {\textit Methyl-4,6-O-benzylidene-$\alpha$ -D-mannopyranoside ($\alpha$-manno)} in water and toluene are probed by neutron scattering.
Bielejewski M., Bielejewski M., Boettcher C., Busselez R., Bée M., Corkhill P., Cui J., D. Richard M. F., de Jong J. J. D., Duncan D. C., Edwards W., Egelstaff P., Frick B., Gronwald O., Gronwald O., Gronwald O., Hirst A. R., Isabelle Morfin, Klein M., Kowalczuk J., Liu G., Luboradzki R., Lupi L., Lupi L., Marie Plazanet, Miguel A. Gonzalez, Ollivier J., Perticaroli S., Pierre C̨arc̨abal, Pissis P., Plazanet M., Plazanet M., Pozzo J.-L., Qvist J., Sakurai K., Sangeetha N. M., Seydel T., Shapiro Y. E., Sylvie Spagnoli, Taschin A., Terech P., Tritt-Goc J., Tritt-Goc J., Tritt-Goc J., Valéry C., van Esch J., Vintiloiu A., Vogel M., Weiss R. G., Yoza K.   +49 more
core   +2 more sources

Quasi-Elastic Scattering, Random Fields and phonon-coupling effects in PbMg1/3Nb2/3O3

, 2005
The low-energy part of the vibration spectrum in PbMg$_{1/3}$Nb$_{2/3}$O$_3$ (PMN) relaxor ferroelectric has been studied by neutron scattering above and below the Burns temperature, T$_d$.
B Roessli, Bruce A D, Coombs G J, Cross L E, de Mathan N, Gehring P M, Laiho R, Lushnikov S G, P Huber, R A Cowley, S G Lushnikov, S N Gvasaliya, Schmidt G, Siny I G, Smolenskii G A, Wehner R K   +15 more
core   +1 more source

Quasi-free (p,2p) and (p,pn) reactions with unstable nuclei [PDF]

, 2013
We study (p,2p) and (p,pn) reactions at proton energies in the range of 100 MeV -- 1 GeV. Our purpose is to explore the most sensitive observables in unpolarized reactions with inverse kinematics involving radioactive nuclei.
Aumann, T., Bertulani, C. A., Ryckebusch, J.   +2 more
core   +3 more sources

Characterisation of ethylene adsorption on model skeletal cobalt catalysts by inelastic and quasi-elastic neutron scattering

Catalysis Communications, 2022
To bridge the materials gap of single crystal work on the Fischer-Tropsch chain-growth mechanism, ethylene adsorption on a model skeletal cobalt catalyst was studied. Speciation and mobility of surface species were characterised using inelastic (INS) and
Edward Jones, Donald R. Inns, Sandra E. Dann, Ian P. Silverwood, Simon A. Kondrat   +4 more
doaj   +1 more source

Gapped and gapless short range ordered magnetic states with $(\frac{1}{2},\frac{1}{2},\frac{1}{2})$ wavevectors in the pyrochlore magnet Tb$_{2+x}$Ti$_{2-x}$O$_{7+\delta}$ [PDF]

, 2015
Recent low temperature heat capacity (C$_P$) measurements on polycrystalline samples of the pyrochlore antiferromagnet Tb$_{2+x}$Ti$_{2-x}$O$_{7+\delta}$ have shown a strong sensitivity to the precise Tb concentration $x$, with a large anomaly exhibited ...
Copley, J. R. D., Couchman, M., Dabkowska, H. A., Fritsch, K., Gaudet, J., Gaulin, B. D., Kermarrec, E., Kycia, J. B., Maharaj, D. D., Morningstar, A., Pomaranski, D., Qiu, Y.   +11 more
core   +1 more source

STAR POLYMER/WATER SOLUTIONS: NEW EXPERIMENTAL FINDINGS

Condensed Matter Physics, 2002
The purpose of the present work is to highlight a number of recent experimental results that have contributed significantly to the research area of star polymer.
C.Branca, S.Magazu, F.Migliardo
doaj   +1 more source

Experimental demonstration of the novel “van-Hove integral method (vHI)” for measuring diffusive dynamics by elastic neutron scattering

Scientific Reports, 2021
Quasi-elastic neutron scattering (QENS)—based on the seminal work of Nobel Laureate Brockhouse—has been one of the major methods for studying pico-second to nano-second diffusive dynamics over the past 70 years.
Antonio Benedetto, Gordon J. Kearley
doaj   +1 more source

Polarized neutron scattering studies of the kagome lattice antiferromagnet KFe3(OH)6(SO4)2

, 2009
We report polarized neutron scattering studies of spin-wave excitations and spin fluctuations in the S=5/2 kagome lattice antiferromagnet KFe3(OH)6(SO4)2 (jarosite).
D. Grohol, D.G. Nocera, Dzyaloshinskii, Elhajal, Grohol, Harris, Inami, J.S. Helton, K. Kakurai, K. Matan, Matan, Moriya, Nishiyama, S. Wakimoto, Takeda, Wills, Y.S. Lee, Yildirim   +17 more
core   +1 more source