๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Simultaneous measurement of the heat capacity and superfluid density of 4He films in vycor glass

โœ Scribed by S.Q. Murphy; J.D. Reppy

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
231 KB
Volume
165-166
Category
Article
ISSN
0921-4526

No coin nor oath required. For personal study only.

โœฆ Synopsis

A simultaneous measurement of the heat capacity and superfluid density of thin 4He films on Vycor glass has been made. We have conclusively established the 3D nature of the critical region by the observation of a heat capacity peak coincident with Z', of the film. In addition, we find reasonable agreement when two scale factor universality is used to compare the critical region of the film transition to that of the bulk lambda transition.

๐Ÿ“œ SIMILAR VOLUMES

Improved measurements of the areal super
Improved measurements of the areal superfluid density of 4He films
โœ M.G.M. Brocken; A. de Waard; H. van Beelen ๐Ÿ“‚ Article ๐Ÿ“… 1989 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 510 KB

Accurate values for the area1 superfluid density of thin 4He films on glass have been deduced from the measured periods of two different modes of oscillation in an isothermal third sound Helmholtz oscillator with vapour reservoirs. No prier knowledge of the Van der Waals potential on glass is used.

Simultaneous measurements of heat capaci
Simultaneous measurements of heat capacity and pressure coefficient of liquid He4 and He3 - He4 mixtures
โœ T. Takada; M. Okaji; J. Yuyama; H. Suzuki; T. Watanabe ๐Ÿ“‚ Article ๐Ÿ“… 1981 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 470 KB

An apparatus for simultaneous measurements of heat capacities and pressure coefficients was designed and constructed for experimental studies of critical phenomena near the lambda points of liquid He 4 and He 3 -He 4 mixtures. The pressure was measured with a capacitance pressure sensor involving a

Freezing, melting and superfluidity of4H
Freezing, melting and superfluidity of4He near the melting curve minimum in Vycor
โœ Eric Molz; John Beamish ๐Ÿ“‚ Article ๐Ÿ“… 1994 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 148 KB

Since freezing is suppressed in small pores such as those of Vycor, superfluidity occurs at substantially higher pressures than in bulk 4He. Ultrasonic measurements show that the amount of superfluid in the pores does not decrease until freezing begins at a pressure of about 36 bar. At slightly high