NEUTRON INELASTIC-SCATTERING FROM HE-4 IN RESTRICTED GEOMETRIES

Authors
GIBBS MR SOKOL PE AZUAH RT STIRLING WG ADAMS MA
Citation
Mr. Gibbs et al., NEUTRON INELASTIC-SCATTERING FROM HE-4 IN RESTRICTED GEOMETRIES, Physica. B, Condensed matter, 213, 1995, pp. 462-464
Citations number
7
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physica. B, Condensed matter → ACNP
ISSN journal
09214526
Volume
213
Year of publication
1995
Pages
462 - 464
Database
ISI
SICI code
0921-4526(1995)213:<462:NIFHIR>2.0.ZU;2-1
Abstract
When liquid He-4 is condensed in porous aerogel glass (typical pore si ze approximate to 5000 Angstrom), many of the superfluid properties ar e significantly altered. Measurements have been made of the dynamic st ructure factor S(Q, omega) of liquid He-4 in restricted geometries. Th e collective phonon-roton excitations are shown to have an intrinsic b roadening associated with the restricted geometry. The temperature dep endence of the excitation spectrum is discussed.