The fixed points of the3He melting curve

✍ Scribed by Albrecht Hoffmann; Jost Engert; Wolfgang Buck

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 190 KB
• Volume: 194-196
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/0921-4526(94)90339-5

✦ Synopsis

After the temperature value of the 3He melting pressure minimum of 315.1 mK has been confirmed by other authors, now the pressure values of the other fixed points of the melting curve are determined. To avoid the limitations due to the uncertainty of the absolut pressure scale it is more precise to rely on pressure differences related to the minimum pressure or the pressure of the superfluid A transition than on absolute pressures. The distance between both is determined to be (0.50264 + 0.00008) MPa and differs from Greywall's data by 0.00060 MPa. The difference between the magnetic transition in the solid 3He and the A transition is (0.00521 + 0.00005) MPa. Based on the NIST minimum pressure of 2.93118 MPa the present absolut values axe, for comparison, 3.43382 MPa, 3.43588 MPa, and 3.43903 MPa for the A, B and magnetic transiton, respectively.