Effective Viscosity of Liquid Helium Isotope Mixtures

  • D. S. Betts
  • D. F. Brewer
  • R. Lucking


Recently results were reported’ from this laboratory on the effective viscosity of dilute mixtures (X3 < 10%) between 20 m°K and 1°K. In the present work we have extended the ranges of concentration up to X3 = 100% and of temperature up to 2°K so that all accessible areas of the phase diagram have now been investigated. Only in the region of the tricritical point (X 3 = 67%; T = 0.87°K) have serious difficulties been encountered, and further work there will be necessary to improve the technique.


Effective Viscosity Tricritical Point Accessible Area Logarithmic Decrement Filling Capillary 
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Copyright information

© Springer Science+Business Media New York 1974

Authors and Affiliations

  • D. S. Betts
    • 1
  • D. F. Brewer
    • 1
  • R. Lucking
    • 1
  1. 1.School of Mathematical and Physical SciencesUniversity of SussexBrightonUK

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