The high-frequency collective dynamics of molten potassium was disucssed using inelastic x-ray scattering. It was found that a two-step relaxation scenario similar to that found in other liquid metals applied to liquid potassium. It was found that the Brillouin linewidth was not related to the whole longitudinal velocity but rather to the 'microscopic' part of the viscosity. The microscopic relaxation process which were traced back to the presence of 'instantaneous' disorder rather than to the crossover from a liquid to solidlike response was also elaborated.

Collective dynamics in molten potassium: An inelastic x-ray scattering study / A. Monaco, T. Scopigno, P. Benassi, A. Giugni, G. Monaco, M. Nardone, G. Ruocco, M. Sampoli. - In: THE JOURNAL OF CHEMICAL PHYSICS. - ISSN 0021-9606. - 120:17(2004), pp. 8089-8094. [10.1063/1.1689641]

Collective dynamics in molten potassium: An inelastic x-ray scattering study

A. Giugni;
2004

Abstract

The high-frequency collective dynamics of molten potassium was disucssed using inelastic x-ray scattering. It was found that a two-step relaxation scenario similar to that found in other liquid metals applied to liquid potassium. It was found that the Brillouin linewidth was not related to the whole longitudinal velocity but rather to the 'microscopic' part of the viscosity. The microscopic relaxation process which were traced back to the presence of 'instantaneous' disorder rather than to the crossover from a liquid to solidlike response was also elaborated.
Relaxation processes; density-fluctuations; neutron-scattering; liquid cesium; alkali-metals; melting-point; lithium; rubidium; sodium
Settore FIS/03 - Fisica della Materia
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/827911
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