Excitations, BEC, and partially ordered states of liquid 4He in disorder

DOI

We propose measurements of the elementary phonon-roton (p-r) excitations of liquid 4He confined in porous MCM-41 (45 Å pore diameter) at wave vectors Q ¿ beyond the roton¿, 2.4 < Q 2.15 Å-1. The aim is to determine the mode energy, weight and its end point in Q. Measurements at lower Q suggest that there is Bose-Einstein condensation (BEC) at temperatures above Tc in the normal liquid phase, interpreted as ¿ localized¿ BEC, a partially ordered state in porous media. This is a resubmission of RB 620419 performed in December 2006. RB 620419 was partially unsuccessful because of cryogenic and instrument related problems at that time.

Identifier
DOI https://doi.org/10.5286/ISIS.E.24003357
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/24003357
Provenance
Creator Dr Souleymane Omar Diallo; Professor Henry Glyde; Dr Mark Adams; Dr Richard Azuah
Publisher ISIS Neutron and Muon Source
Publication Year 2011
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Photon- and Neutron Geosciences
Temporal Coverage Begin 2008-09-24T08:50:21Z
Temporal Coverage End 2008-10-01T22:54:49Z