3He constant-volume gas thermometry: Calculations for a temperature scale between 0.8 and 25 K
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Abstract
A discussion is presented on the possibilities of a3He gas thermometer for defining a temperature scale below 30 K, based on recent new measurements of the virial coefficient. The influence of all corrections of interest is given in comparison with4He gas thermometry and with4He and3He vapor pressure thermometry. It is shown that a3He gas thermometer can be operated down to temperatures <1 K, with an estimated inaccuracy of less than ±0.5 mK, thereby obviating the explicit need of the3He and4He vapor pressure scales below 5 K, and directly joining a possible scale based on the3He melting curve.
Keywords
Vapor Pressure Magnetic Material Temperature Scale Melting Curve Virial Coefficient
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© Plenum Publishing Corporation 1987