ISIS Neutron and Muon Source Data Journal

Impact of inter- and intra-molecular interactions on the collective dynamics of liquids and glass-forming systems

Abstract: In a recent LET experiment with polarization analysis we have disentangled for the first time collective (coherent) and self (incoherent) contributions to the intensity scattered by heavy water. They behave in a strikingly different way in the region of length scales larger than the inter-molecular distances --an almost unexplored territory due to the low intensities and mixing contributions. The collective response at such mesoscales is nearly independent of scattering vector (Q), suggesting the dominance of a Q-independent mode, with the same temperature dependence as the mainly diffusive collective dynamics at inter-molecular scales. Here we will study the impact of inter- and intra-molecular interactions on the collective dynamics of liquids and glass-formers: van der Waals (e. g. tetrahydrofurane) vs H-bonds (previously studied water), and the internal connectivity (polymer melt).

Principal Investigator: Professor Arantxa Arbe
Experimenter: Dr JOSE MARTINEZ-GONZALEZ
Experimenter: Dr Ross Stewart
Local Contact: Dr Gøran Nilsen
Experimenter: Professor Juan Colmenero

DOI: 10.5286/ISIS.E.RB2010388

ISIS Experiment Number: RB2010388

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Professor Arantxa Arbe et al; (2020): Impact of inter- and intra-molecular interactions on the collective dynamics of liquids and glass-forming systems, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2010388

Data is released under the CC-BY-4.0 license.