We report on a novel simultaneous observation of two inelastic doublets in the dynamic structure factor of the liquid alloy Li30Bi70. This result establishes the coexistence of two density fluctuation modes in a liquid binary system with disparate mass components. The measurements of the dynamic structure factor of the alloy have been performed on the hot neutron threeaxis spectrometer IN1 of the Institut Laue-Langevin with an unprecedented energy resolution in the small wave vector domain. Analysis of the dynamical parameters characterizing the two excitations reveals the acoustic nature of the low-frequency mode and suggests an optic-like nature for the high-frequency mode. A comparison with recent neutron scattering results on pure liquid Bi suggests that the low-frequency mode in the alloy is closely related to the heavier component dynamics.
Evidence for the coexistence of two density fluctuation modes inmolten Li30Bi70 as probed by neutron scattering / L. E. Bove; F. Formisano; E. Guarini; A. Ivanov; C. Petrillo; F. Sacchetti. - In: EUROPHYSICS LETTERS. - ISSN 0295-5075. - STAMPA. - 79:(2007), pp. 16002-p1-16002-p5. [10.1209/0295-5075/79/16002]
Evidence for the coexistence of two density fluctuation modes inmolten Li30Bi70 as probed by neutron scattering
GUARINI GRISALDI TAJA O DEL TAJA, ELEONORAData Curation
;
2007
Abstract
We report on a novel simultaneous observation of two inelastic doublets in the dynamic structure factor of the liquid alloy Li30Bi70. This result establishes the coexistence of two density fluctuation modes in a liquid binary system with disparate mass components. The measurements of the dynamic structure factor of the alloy have been performed on the hot neutron threeaxis spectrometer IN1 of the Institut Laue-Langevin with an unprecedented energy resolution in the small wave vector domain. Analysis of the dynamical parameters characterizing the two excitations reveals the acoustic nature of the low-frequency mode and suggests an optic-like nature for the high-frequency mode. A comparison with recent neutron scattering results on pure liquid Bi suggests that the low-frequency mode in the alloy is closely related to the heavier component dynamics.File | Dimensione | Formato | |
---|---|---|---|
epl_libi.pdf
Accesso chiuso
Tipologia:
Versione finale referata (Postprint, Accepted manuscript)
Licenza:
Tutti i diritti riservati
Dimensione
527.45 kB
Formato
Adobe PDF
|
527.45 kB | Adobe PDF | Richiedi una copia |
I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.