The 1962 He3 Scale of Temperatures III. Evaluation and Status

T R Roberts; R H Sherman; S G Sydoriak

doi:10.6028/jres.068A.054

The 1962 He³ Scale of Temperatures III. Evaluation and Status

J Res Natl Bur Stand A Phys Chem. 1964 Nov-Dec;68A(6):567-578. doi: 10.6028/jres.068A.054.

Authors

T R Roberts¹, R H Sherman¹, S G Sydoriak¹

Affiliation

¹ Los Alamos Scientific Laboratory, University of California, Los Alamos, N. Mex.

Abstract

In this third paper the 1962 He³ Scale of Temperatures is evaluated both as to its precision and its deviations from the thermodynamic Kelvin Scale. Various thermodynamic quantities of He³ consistent with the 1962 He³ Scale are derived and listed. The correction to an observed vapor pressure for small amounts of He⁴ is discussed and tabulated. A description is given of the method of multiple variable least squares analysis used for deriving the final scale equation and for re-analysis of isotherm data. Finally the present status of the 1962 He³ Scale is discussed along with some considerations for the future.