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Título

Collective excitations in liquid deuterium: Neutron-scattering and correlated-density-matrix results

AutorBermejo, Francisco Javier ; Mompean, F. J. ; García-Hernández, M.; Martínez, J. L. ; Martin-Marero, D.; Chahid, A.; Senger, G.; Ristig, M. L.
Fecha de publicación1-jun-1993
EditorAmerican Physical Society
CitaciónPhysical Review B 47: 15097- 15112 (1993)
ResumenThe collective dynamics of liquid deuterium is studied by means of inelastic neutron scattering (INS) at 20.14 K and under 2 bars of applied pressure using two different incident energies. The low-incident-energy (high-energy-resolution) spectra are studied in detail by means of a time-of-flight (TOF) technique, whereas the finite-frequency response is investigated using a higher incident energy on a triple-axis spectrometer (TAS). The main finding of our work is the observation by the latter experimental technique of well-defined collective excitations up to a momentum transfer of 3.8 A-1. Comparisons are established with the dispersive behavior observed in other liquid systems as well as with the predictions from recent correlated-density-matrix calculations. © 1993 The American Physical Society.
Descripción16 págs.; 13 figs.
Versión del editorhttps://doi.org/10.1103/PhysRevB.47.15097
URIhttp://hdl.handle.net/10261/140044
DOI10.1103/PhysRevB.47.15097
Identificadoresdoi: 10.1103/PhysRevB.47.15097
issn: 0163-1829
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