ISIS Neutron and Muon Source Data Journal

Structural changes moving between Isomorphs

Abstract: The goal of the experiment is to continue our work on the first experimental test of the predictions from isomorph theory,that the structure of a liquid, in reduced units, is invariant along certain lines, isomorphs, in the (P, T)-phase diagram. Isomorph theory predicts that the relaxation time of the liquid is invariant along isomorphs . A previous experiment conducted by the proposer group have shown great agreement with the predictions of isomorph theory for main liquid structure peak of cumene (Isopropylbenzene, C9H12), and the goal of the experiment is to give an microscopic understanding of the changes we see moving between isomorphs. Experimentally we wish to measure on cumene, d-cumene and 50:50 mixture, at four different state points along the ambient pressure isobar. Using isotopic substitution and EPSR to analyze the results. The unique construction of SANDALS (and NIMROD) makes it possible to measure neutron diffraction on both hydrogen-containing as well as deuterated samples.

Principal Investigator: Mr Erik Hillo Lørup
Experimenter: Professor Kristine Niss
Local Contact: Dr Oliver Alderman
Experimenter: Mr Calvin Carlson

DOI: 10.5286/ISIS.E.RB2400007

ISIS Experiment Number: RB2400007

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:
Mr Erik Hillo Lørup et al; (2024): Structural changes moving between Isomorphs, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2400007

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