Intercomparison of NBS and Helsinki temperature scales in the millikelvin region

Research output: Contribution to journalArticle


  • E. Lhota
  • M. T. Manninen
  • J.P. Pekola

  • A. T. Soinne
  • R. J. Soulen

Research units

  • National Bureau of Standards Washington


The Helsinki temperature scale, based on platinum NMR, is compared with the NBS noise and nuclear orientation temperature scale by means of three fixed points: the 3He superfluid transition temperature at zero pressure (Tc) and the superconductive transition temperatures of samples of W and Be. The value for Tc on the NBS scale is found to be 1.025 mK, in close agreement with the Helsinki value of 1.04 mK. This result supports the liquid 3He heat capacity data measured earlier at Helsinki.


Original languageEnglish
Pages (from-to)337-338
Number of pages2
JournalPhysica B + C
Issue number1-3
Publication statusPublished - 1981
MoE publication typeA1 Journal article-refereed

ID: 4371544