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Density dependence of the momentum distributions in liquid para-hydrogen

AutorDawidowski, J. ; Bermejo, Francisco Javier ; Ristig, M. L.; Cabrillo García, Carlos ; Bennington, S.M.
Fecha de publicación21-abr-2006
EditorAmerican Physical Society
CitaciónPhysical Review B - Condensed Matter and Materials Physics 73: 144203 (2006)
ResumenMomentum distributions of liquid para-hydrogen were determined by means of inelastic neutron scattering under applied pressures ranging from 1 to 80 bars, at T=16.5 K. The data processing procedure involves the parametrization of the dynamic structure factor and yields a set of momentum distributions as functions of the density. The results depict significant pressure dependences for all single-particle quantities such as the momentum distributions and average kinetic energies as well as for the final-state effects. The obtained results enable us to quantify the departure of the momentum distributions from classical Maxwell-Gauss shape. Such observations are then rationalized with the help of calculations that were carried out in terms of the correlated density matrix formalism. © 2006 The American Physical Society.
Descripción10 págs.; 11 figs.; PACS number s : 67.20. k, 61.12. q, 61.20.Ja
Versión del editorhttps://doi.org/10.1103/PhysRevB.73.144203
URIhttp://hdl.handle.net/10261/140170
DOI10.1103/PhysRevB.73.144203
Identificadoresdoi: 10.1103/PhysRevB.73.144203
issn: 1098-0121
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