The 1958 He4 scale of temperatures. Part 1. Introduction
- 1 January 1960
- journal article
- Published by National Institute of Standards and Technology (NIST) in Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry
- Vol. 64A (1) , 1-4
- https://doi.org/10.6028/jres.064a.001
Abstract
The generally used practical scale of temperatures between 1° and 5.2° K is the He4 vapor pressure scale based on an accepted vapor pressure equation or table. In Sèvres (near Paris), October 1958, the International Committee on Weights and Measures recommended for international use the "1958 He4 Scale" based on a vapor pressure table arrived at through international cooperation and agreement. This table resulted from a consideration of all reliable He4 vapor pressure data obtained using gas thermometers, and paramagnetic susceptibility and carbon resistor thermometers. The theoretical vapor pressure equation from statistical thermodynamics was used with thermodynamic data on liquid He4 and the vapor equation of state to insure satisfactory agreement of the vapor pressure table with reliable thermodynamic data.Keywords
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