Forskning ved Københavns Universitet - Københavns Universitet


3He melting pressure temperature scale

Publikation: Bidrag til bog/antologi/rapportKonferencebidrag i proceedingsForskningfagfællebedømt

  • W.P. Halperin
  • C.N. Archie
  • R.C. Richardson
  • Finn Berg Rasmussen
The latent heat for solidification of **3He has been measured along the **3He melting curve between 23 and 1 mK. A temperature scale is established which depends only on measurements of heat, pressure and volume, and on the condition that the entropy of solid **3He approaches R ln 2 at high temperatures. The A feature of the melting curve which suggests itself as a thermometric fixed point is found to be T//A equals 2. 75 plus or minus 0. 11 mK. The agreement between this value and independent measurements of T//A, based on nuclear or electronic paramagnetism, Johnson noise thermometry or on properties of liquid **3He, is briefly discussed
TitelProc of Int Cryog Eng Conf, 6th (ICEC6); Grenoble, Fr, USA; ; 11 May 1976 through 14 May 1976
Antal sider4
Publikationsdato11 maj 1976
StatusUdgivet - 11 maj 1976

ID: 126476468