THE PROPERTIES OF VACANCIES IN SOLID HE-4 AS STUDIED BY PRESSURE MEASUREMENTS

Authors
REMEIJER P STEEL SC JOCHEMSEN R FROSSATI G GOODKIND JM
Citation
P. Remeijer et al., THE PROPERTIES OF VACANCIES IN SOLID HE-4 AS STUDIED BY PRESSURE MEASUREMENTS, Low temperature physics, 23(5-6), 1997, pp. 438-447
Citations number
28
Categorie Soggetti
Physics, Applied
Journal title
Low temperature physics → ACNP
ISSN journal
1063777X
Volume
23
Issue
5-6
Year of publication
1997
Pages
438 - 447
Database
ISI
SICI code
1063-777X(1997)23:5-6<438:TPOVIS>2.0.ZU;2-T
Abstract
The temperature dependence of the pressure at a constant volume in sol id He-4 in the low-density hcp phase has been measured. The measuremen ts are analyzed in terms of a localized vacancy model and the free Bos e gas model of vacancies in solid helium, The results agree better wit h the free Bose gas model, On the basis of this model the effective ma ss of the vacancies was determined to be 3-5 times the bare mass of a He-4 atom, which corresponds to a bandwidth of 1.3-2.1 K. (C) 1997 Ame rican Institute of Physics.