Realization of the pascal based on argon using a Fabry–Perot refractometer

Author:

Silander Isak1ORCID,Zakrisson Johan12ORCID,Axner Ove1ORCID,Zelan Martin2ORCID

Affiliation:

1. Umeå University

2. RISE Research Institutes of Sweden

Abstract

Based on a recent experimental determination of the static polarizability and a first-principle calculation of the frequency-dependent dipole polarizability of argon, this work presents, by using a Fabry–Perot refractometer operated at 1550 nm, a realization of the SI unit of pressure, the pascal, for pressures up to 100 kPa, with an uncertainty of [(1.0 mPa)2 + (5.8 × 10−6 P)2 + (26 × 10−12P2)2]1/2. The work also presents a value of the molar polarizability of N2 at 1550 nm and 302.9146 K of 4.396572(26) × 10−6 m3/mol, which agrees well with previously determined ones.

Funder

Vetenskapsrådet

VINNOVA

European Partnership on Metrology

Publisher

Optica Publishing Group

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