ISIS Neutron and Muon Source Data Journal
This is a page describing data taken during an experiment at the ISIS Neutron and Muon Source. Information about the ISIS Neutron and Muon Source can be found at https://www.isis.stfc.ac.uk.
Sub-Kelvin helium confinement in crystalline nanopores
Abstract: Under confinement in porous media, helium-4 excitations develop a complicate behaviour and, in addition to a bulk-like spectrum, a second branch emerges due to helium-4 atoms in proximity of the pore walls. These denser helium-4 layers support excitations that are known as 2D rotons because they are so far exclusively observed in the roton region, while they are predicted to exist at all wave vectors. We propose to investigate helium-4 confinement in the purely inorganic LTA zeolite by INS and in a helium-3 sorption insert. The great advantage of LTA is its crystallinity, combined with a relatively large surface-to-volume ratio. These characteristics will overcome the limitations encountered so far for the observation of helium-4 layer modes, i.e., disruptive surface morphologies and weak intensities. All the confining porous media investigated so far have amorphous surface morphology.
Public release date: 23 October 2021
Principal Investigator: Dr Marco Evangelisti
Experimenter: Dr Tatiana Guidi
Experimenter: Dr Fernando Luis
Experimenter: Dr Olivier Roubeau
Experimenter: Dr Palacios
DOI: 10.5286/ISIS.E.98182425
Parent DOI: 10.5286/ISIS.E.RB1820378
ISIS Experiment Number: RB1820378
Part Number: 1
Date of Experiment: 18 October 2018
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 Marco Evangelisti et al; (2018): Sub-Kelvin helium confinement in crystalline nanopores, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.98182425
