The Calculated Properties of Helium II
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Date
1973-12
Authors
Brooks, James S.
Donnelly, Russell J.
Journal Title
Journal ISSN
Volume Title
Publisher
University of Oregon
Abstract
There is a continual need for a consistent set of experimental
data on helium II. Compilations have been given in the Appendix of Wilks's
"The Properties of Liquid and Solid Helium" and Donnelly's "Experimental
Superfluidity." Since then, it has become increasingly evident that all
quantities must be known as a function of pressure as well as temperature,
and an inspection of experimental data shows that there are many gaps in
the (T , P)-plane and not a few inconsistencies. We have decided to try to
provide an interim solution to this problem by producing empirical formulae
which represent the data over the complete range, excluding the transition
region near the A-line. The results of these calculations are tabulated in
increments of 0.05 Kin temperature from 0.1 K to 2.10 K, and in increments
of 2.5 atmospheres from Oto 25 atmospheres. The tables are presented in
Part I and are printed on colored sheets to facilitate reference to different
properties.
The reliability of each table varies, and in some cases the experimental
data are inconsistent. Although most tables are believed to agree with experiment
to within± 10% below 1.6 K, the discussions of Part II, and where
necessary the original data, should be consulted when accuracy is necessary.
The authors are acutely aware of the limitations of these tables and
would appreciate receiving suggestions to improve them as well as copies
of new experimental data as it becomes available. The success of these
tables will be measured, in part, by the speed with which they are superseded.
Description
72 pages