Thermomolecular Pressure Ratios for <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi mathvariant="normal">He</mi></mrow><mrow><mn>3</mn></mrow></msup></mrow></math></span> and <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi mathvariant="normal">He</mi></mrow><mrow><mn>4</mn></mrow></msup></mrow></math></span>

Thomas R. Roberts; Stephen G. Sydoriak

doi:10.1103/PhysRev.102.304

Thermomolecular Pressure Ratios for ${He}^{3}$ and ${He}^{4}$

Thomas R. Roberts and Stephen G. Sydoriak

Phys. Rev. 102, 304 – Published 15 April 1956

Abstract

Thermomolecular pressure ratios of ${He}^{3}$ have been measured for a tube extending from room temperature to a bulb at 2°K. The results agree within experimental accuracy with ${He}^{4}$ ratios calculated from the Weber-Schmidt equation. Detailed calculations from this equation are given. Limitations of the equation due to large deviations from ideal viscosity behavior in the liquid helium range are discussed.

Received 2 December 1955

DOI:https://doi.org/10.1103/PhysRev.102.304

Authors & Affiliations

Thomas R. Roberts and Stephen G. Sydoriak

Los Alamos Scientific Laboratory, University of California, Los Alamos, New Mexico

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Issue

Vol. 102, Iss. 2 — April 1956

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