2026-04-27T22:05:36Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/638422025-01-31T10:24:49Zcom_10324_36327com_10324_954com_10324_894com_10324_1159com_10324_931col_10324_36329col_10324_1310

Ab initio study of longitudinal and transverse dynamics, including fast sound, in molten UO2 and liquid Li–Pb alloys González Del Rio, Beatriz González Tesedo, Luis Enrique Producción Científica The disparity between the masses of the two components in a binary liquid system can lead to the appearance of a peculiar phenomenon named “fast sound,” which was identified for the first time in Li4Pb several decades ago and later observed in other Li based alloys. However, the exact characteristics and nature of this phenomenon and the reasons behind its appearance have not totally been identified yet. In this work, we analyze the longitudinal and transverse current correlation functions of UO2 , Li4Pb, and Li0.17Pb0.83 , as obtained from ab initio molecular dynamics simulations. We find that fast sound appears to occur in the two former systems but not in the latter. Additionally, we discuss some of the properties of the liquid mixtures that may be related to the appearance (or absence) of the phenomenon, such as the composition, the polyhedral structure of the melt, and the type of bonding in the system. 2023-12-28T10:43:02Z 2023-12-28T10:43:02Z 2023 info:eu-repo/semantics/article The Journal of Chemical Physics, 2023, Vol. 159, p. 234502:1-12 0021-9606 https://uvadoc.uva.es/handle/10324/63842 10.1063/5.0182648 234502-1 23 234502-12 The Journal of Chemical Physics 159 1089-7690 eng https://doi.org/10.1063/5.0182648 AIP Publishing SI