Structural and Microscopic Relaxation Processes in Liquid Hydrogen Fluoride
R. Angelini, P. Giura, G. Monaco, G. Ruocco, F. Sette, and R. Verbeni
TL;DR
This study investigates the high-frequency collective dynamics of liquid hydrogen fluoride using inelastic x-ray scattering, revealing two universal relaxation processes similar to those in liquid water and other liquids.
Contribution
It provides experimental evidence of two relaxation processes in liquid hydrogen fluoride, highlighting their universality across hydrogen-bonded liquids and other liquid systems.
Findings
Two active relaxation processes with subpicosecond timescales identified
Similar relaxation behavior observed in liquid water
Supports universality of relaxation processes in liquids
Abstract
The high frequency collective dynamics of liquid hydrogen fluoride is studied by inelastic x-ray scattering on the coexistence curve at T = 239 K. The comparison with existing molecular dynamics simulations shows the existence of two active relaxation processes with characteristic time scales in the subpicosecond range. The observed scenario is very similar to that found in liquid water. This suggests that hydrogen bonded liquids behave similarly to other very different systems as simple and glass forming liquids, thus indicating that these two relaxation processes are universal features of the liquid state.
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