Sodium self-diffusion coefficient in sodium silicate glass by quasielastic neutron scattering

1994 ◽  
Vol 95 (1) ◽  
pp. 49-53 ◽  
Author(s):  
R. Hempelmann ◽  
C. J. Carlile ◽  
D. Beyer ◽  
Ch. Kaps
Keyword(s):  
Diffusion Coefficient ◽  
Neutron Scattering ◽  
Sodium Silicate ◽  
Silicate Glass ◽  
Self Diffusion ◽  
Sodium Silicate Glass ◽  
Quasielastic Neutron ◽  
Quasielastic Neutron Scattering ◽  
Self Diffusion Coefficient

Self Diffusion in Liquid Titanium: Quasielastic Neutron Scattering and Molecular Dynamics Simulation

2009 ◽  
Vol 289-292 ◽  
pp. 609-614 ◽  
Author(s):  
Andreas Meyer ◽  
Jürgen Horbach ◽  
O. Heinen ◽  
Dirk Holland-Moritz ◽  
T. Unruh
Keyword(s):  
Molecular Dynamics ◽  
Diffusion Coefficient ◽  
Neutron Scattering ◽  
The Self ◽  
Dynamics Simulation ◽  
Self Diffusion ◽  
Quasielastic Neutron ◽  
Liquid Titanium ◽  
Quasielastic Neutron Scattering ◽  
Self Diffusion Coefficient

Self diffusion in liquid titanium was measured at 2000K by quasielastic neutron scattering (QNS) in combination with container less processing via electromagnetic levitation. At small wavenumbers q the quasielastic signal is dominated by incoherent scattering. Up to about 1.2 °A−1 the width of the quasielastic line exhibits a q2 dependence as expected for long range atomic transport, thus allowing to measure the self diffusion coefficient DTi. As a result the value DTi = (5.3± 0.2)× 10−9 m2s−1 was obtained.With a molecular dynamics (MD) computer simulation using an embedded atom model (EAM) for Ti, the self diffusion coefficient is determined from the mean square displacement as well as from the decay of the incoherent intermediate scattering function at different q. By comparing both methods, we show that the hydrodynamic prediction of a q2 dependence indeed extends up to about 1.2 °A−1. Since this result does not depend significantly on the details of the interatomic potential, our findings show that accurate values of self diffusion coefficients in liquid metals can be measured by QNS on an absolute scale.

Self-diffusion in liquid lithium from coherent quasielastic neutron scattering

2012 ◽  
Vol 407 (23) ◽  
pp. 4567-4569 ◽  
Author(s):  
N.M. Blagoveshchenskii ◽  
A.G. Novikov ◽  
V.V. Savostin
Keyword(s):  
Neutron Scattering ◽  
Liquid Lithium ◽  
Self Diffusion ◽  
Quasielastic Neutron ◽  
Quasielastic Neutron Scattering

scholarly journals Self-diffusion and microscopic dynamics in a gold-silicon liquid investigated with quasielastic neutron scattering

2016 ◽  
Vol 108 (12) ◽  
pp. 121902 ◽  
Author(s):  
Zach Evenson ◽  
Fan Yang ◽  
Giovanna G. Simeoni ◽  
Andreas Meyer
Keyword(s):  
Neutron Scattering ◽  
Self Diffusion ◽  
Quasielastic Neutron ◽  
Quasielastic Neutron Scattering ◽  
Microscopic Dynamics
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