Measurements of the pressure vs. temperature along the melting curve of 3He are presented. Cooling is obtained by adiabatic demagnetization of copper nuclei and these measurements extend below 1 inK. The results support conclusions about the entropy of solid 3He drawn from measurements on the heat c
3He melting pressure temperature scale below 25 mK
β Scribed by W. Ni; J. S. Xia; E. D. Adams; P. S. Haskins; J. E. McKisson
- Publisher
- Springer US
- Year
- 1995
- Tongue
- English
- Weight
- 786 KB
- Volume
- 99
- Category
- Article
- ISSN
- 0022-2291
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π SIMILAR VOLUMES
Two independent low temperature scales, based on noise thermometry below 0.6 K and on extrapolation from 1.5 K using magnetic thermometry, have been realized and compared. Both scales coincide at the pressure minimum of the He-3 melting curve within +0.3 mK and determine its temperature as 315.1 mK.
The osmotic pressure of liquid 3He--4He mixtures, condensed in a vessel connected by means of a, narrow slit to a similar vessel containing pure 4He, has been measured by determining the fountain pressure exerted by the pure 4He, when heated, necessary to obtain equilibrium with the osmotic pressure