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Journal of Low Temperature Physics

, Volume 101, Issue 1–2, pp 305–310 | Cite as

3He melting pressure thermometry

  • W. Ni
  • J. S. Xia
  • E. D. Adams
  • P. S. Haskins
  • J. E. McKisson
Contributed Talks

Abstract

High-precision measurements of the3He melting pressure versus temperature have been made from 500 μK to 25 mK using a60Co nuclear orientation primary thermometer and a Pt NMR susceptibility secondary thermometer. Temperatures for the fixed points on the melting curve are: the superfluid A transition TA = 2.505 mK, the A-B transition TAB = 1.948 mK, and the solid ordering temperature tn = 0.934 mK. These fixed points and a functional form for P(T) constitute a convenient temperature scale, based on a primary thermometer, usable to well below 1 mK.

PACS numbers

64.70.D 67.80 07.20.D 

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Copyright information

© Plenum Publishing Corporation 1995

Authors and Affiliations

  • W. Ni
    • 1
  • J. S. Xia
    • 1
  • E. D. Adams
    • 1
  • P. S. Haskins
    • 1
    • 2
  • J. E. McKisson
    • 1
    • 2
  1. 1.Department of Physics and Center for Ultralow Temperature ResearchUniversity of FloridaGainesville
  2. 2.Institute for Space Science and TechnologyGainesville

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