Polarizability of Helium, Neon, and Argon: New Perspectives for Gas Metrology

Immagine da un esperimento di metrologia dei gas

Ore 11
Torino, INRIM
Sala Conferenze

Christof Gaiser
Physikalisch-Technische Bundesanstalt (PTB)



With dielectric-constant gas thermometry, the molar polarizability of helium, neon, and argon has been determined with relative standard uncertainties of about 2 parts per million. A series of isotherms measured with the three noble gases and two different experimental setups led to this unprecedented level of uncertainty.

These data are crucial for scientists in the field of gas metrology, working on pressure and temperature standards.

Furthermore, with the new benchmark values for neon and argon, theoretical calculations, today about 3 orders of magnitude larger in uncertainty, can be checked and improved.

Ultima modifica: 19/06/2018 - 17:30