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EnglishThe low-momentum dynamics of liquid mercury has been investigated by means of inelastic neutron scattering and molecular dynamics (MD) simulations. Because of the rather high incoherent cross-section and the high mass of mercury. the measured dynamic structure factor is dominated by the self-correlation function, although the low-momentum collective dynamics are made accessible by the very good energy resolution of the experiment. Collective modes are clearly visible against the incoherent scattering up to a momentum transfer of 0.4A(-1) and the associated velocity is found to be 2200+/-200ms(-1), well in excess of the sound velocity which is equal to 1470ms(-1). The self-dynamics, as resulting from either the experiment or the MD simulations, turn out to be characterized by two time scales.
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| Titolo: | Self-dynamics and collective dynamics of liquid mercury | |
| Autori: | ||
| Data di pubblicazione: | 2002 | |
| Rivista: | ||
| Abstract: | The low-momentum dynamics of liquid mercury has been investigated by means of inelastic neutron s...cattering and molecular dynamics (MD) simulations. Because of the rather high incoherent cross-section and the high mass of mercury. the measured dynamic structure factor is dominated by the self-correlation function, although the low-momentum collective dynamics are made accessible by the very good energy resolution of the experiment. Collective modes are clearly visible against the incoherent scattering up to a momentum transfer of 0.4A(-1) and the associated velocity is found to be 2200+/-200ms(-1), well in excess of the sound velocity which is equal to 1470ms(-1). The self-dynamics, as resulting from either the experiment or the MD simulations, turn out to be characterized by two time scales. | |
| Handle: | http://hdl.handle.net/11391/921136 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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