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Título: | Collective excitations in liquid deuterium: Neutron-scattering and correlated-density-matrix results |
Autor: | Bermejo, Francisco Javier CSIC ORCID; Mompean, F. J. CSIC ORCID; García-Hernández, Mar CSIC ORCID ; Martínez, J. L. CSIC ORCID ; Martín-Marero, D. CSIC; Chahid, A.; Senger, G.; Ristig, M. L. | Fecha de publicación: | 1-jun-1993 | Editor: | American Physical Society | Citación: | Physical Review B 47: 15097- 15112 (1993) | Resumen: | The 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. | Descripción: | 16 págs.; 13 figs. | Versión del editor: | https://doi.org/10.1103/PhysRevB.47.15097 | URI: | http://hdl.handle.net/10261/140044 | DOI: | 10.1103/PhysRevB.47.15097 | Identificadores: | doi: 10.1103/PhysRevB.47.15097 issn: 0163-1829 |
Aparece en las colecciones: | (CFMAC-IEM) Artículos |
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