ISIS Neutron and Muon Source Data Journal

Temperature effect on ultra-confined water in beryl, “quantum to classical” transition

Abstract: Recently, we investigated dynamics of water in beryl, the structure of which contains 5 A diameter channels along the c-axis. INS spectra revealed that effective potential for water along the channels was significantly steeper than perpendicular. The observed 7 peaks (E=0.25 to 15meV) at T=1.5K were explained assuming water quantum rotation-translation tunneling across the channels. DINS study of beryl at T=4.3K showed narrow, anisotropic water proton momentum distribution with corresponding kinetic energy, Ek=95meV, which is much less than was previously observed in bulk water (~150 meV). We believe that the exceptionally small Ek in beryl is a result of water tunneling. In this proposal we would like to do DINS for beryl at T=45 and 260 K, where water does not tunnel anymore (should be more ¿classical¿), and for this we need 8 days at VESUVIO.

Principal Investigator: Dr Alexander Kolesnikov
Experimenter: Dr Timothy Prisk
Experimenter: Dr Eugene Mamontov
Experimenter: Dr Lawrence Anovitz
Experimenter: Professor George Reiter

DOI: 10.5286/ISIS.E.RB1510479

ISIS Experiment Number: RB1510479

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:
Dr Alexander Kolesnikov et al; (2015): Temperature effect on ultra-confined water in beryl, “quantum to classical” transition, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1510479

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