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



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


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
Chemical Physics Letters


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