ISIS Neutron and Muon Source Data Journal

The Second Critical Point and Widom line of supercooled confined water

Abstract: In 1992 P. Poole and coworkers have proposed the existence of two water polymorphs below its homogenous nucleation temperature. These are separated by a coexistence line ending in a second critical point. From this point a line of maxima of the correlation lengths (Widom line) originates. Experimental tests of this model have been performed in confined water, that can be easily supercooled. No unambiguous evidence for the existence of the Widom line has been so far published. NIMROD can contribute relevant insights into the vivid debate present in the literature. To this aim, we propose to perform a NDIS experiment on water confined in MCM41 substrates, with different confining sizes, along a temperature path from ambient down to 210 K, at ambient pressure. NIMROD is well suited to evidence at the same time critical fluctuations and/or crystallization.

Principal Investigator: Professor Maria Antonietta Ricci
Experimenter: Professor Fabio Bruni
Experimenter: Dr Marie-Louise Saboungi
Experimenter: Dr Gerald Lelong
Experimenter: Professor Alan Soper
Experimenter: Ms Eleonora Stefanutti

DOI: 10.5286/ISIS.E.RB1610121

ISIS Experiment Number: RB1610121

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 Maria Antonietta Ricci et al; (2016): The Second Critical Point and Widom line of supercooled confined water, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1610121

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