Abstract
The dynamics of the noble-gas liquids underlies that of all liquids making them an important prototypical model system. Using optical Kerr-effect spectroscopy we show that for argon, krypton, and xenon, both the librational and diffusional contributions to the spectrum are surprisingly complex. The diffusional relaxation appears as a stretched-exponential, such as widely found in studies of structured (e.g., glass-forming) liquids and as predicted by mode-coupling theory. We show that this behavior is remarkably similar to that measured in water and suggest that it is a fundamental or universal property.
Original language | English |
---|---|
Pages (from-to) | 201101 |
Journal | Journal of Chemical Physics |
Volume | 131 |
Issue number | 20 |
DOIs | |
Publication status | Published - 30 Nov 2009 |
Keywords
- argon
- diffusion
- krypton
- librational states
- liquid structure
- liquid theory
- optical Kerr effect
- vibrational modes
- xenon