Microscopic self dynamics in liquid hydrogen and in its mixtures with deuterium and neon: a neutron scattering study View Full Text


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Article Info

DATE

2005-02-15

AUTHORS

M. Celli, D. Colognesi, M. Zoppi, A. J. Ramirez-Cuesta

ABSTRACT

No HeadingBy means of inelastic neutron scattering measurements, we have extracted the incoherent scattering function of liquid para-hydrogen, pure and mixed with deuterium or neon, in various thermodynamic conditions. The low-energy parts of the neutron spectra recorded in forward scattering on TOSCA-II were analyzed in the framework of the Gaussian approximation and filled through a Levesque-Vertet model for the velocity auto-correlation function. These correlation functions derived from the forward-scattering data appear totally unable to properly describe the backward-scattering ones. These findings prove a breakdown of the Gaussian approximation for semi-quantum liquids in the kinematic range of our experiment. The present results appear of extreme interest and suggest further investigation on the limits of the widely-used Gaussian approximation. More... »

PAGES

887-892

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10909-005-2320-1

DOI

http://dx.doi.org/10.1007/s10909-005-2320-1

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1023898641


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