Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Semiclassical fifth virial coefficients for improved ab initio helium-­4 standards

Published

Author(s)

Katherine Shaul, Andrew Schultz, David A. Kofke, Michael R. Moldover

Abstract

For helium-4, we present ab initio, semi-classical calculations of virial coefficients Bn for for n = 2, 3, 4, and 5 from 50 K to 1000 K. Using our values of B4 and B5 and the more accurate literature values of B2 and B3, we argue that the ab initio virial nist-equation of state is more accurate than recent, high-quality, densimeter measurements spanning the range {223 K
Citation
Chemical Physics Letters
Volume
531

Keywords

equation of state, helium, gas standards, virial coefficients, thermodynamic standards
Created February 15, 2012, Updated February 19, 2017