Title: Ab initio potential energy curve for the helium atom pair and thermophysical properties of the dilute helium gas. II. Thermophysical standard values for low-density helium
Authors: Bich, Eckard
Hellmann, Robert 
Vogel, Eckhard
Language: eng
Keywords: Helium gas property standards;Helium pair potential;Second and third pressure virial coefficients;Thermal conductivity;Viscosity
Issue Date: 1-Dec-2007
Document Type: Article
Journal / Series / Working Paper (HSU): Molecular Physics
Volume: 105
Issue: 23-24
Page Start: 3035
Page End: 3049
A helium-helium interatomic potential energy curve determined from quantum-mechanical ab initio calculations and described with an analytical representation considering relativistic retardation effects (R. Hellmann, E. Bich, and E. Vogel, Molec. Phys. (in press)) was used in the framework of the quantum-statistical mechanics and of the corresponding kinetic theory to calculate the most important thermophysical properties of helium governed by two-body and three-body interactions. The second pressure virial coefficient as well as the viscosity and thermal conductivity coefficients, the last two in the so-called limit of zero density, were calculated for 3He and 4He from 1 to 10 000 K and the third pressure virial coefficient for 4He from 20 to 10 000 K. The transport property values can be applied as standard values for the complete temperature range of the calculations characterized by an uncertainty of 0.02% for temperatures above 15 K. This uncertainty is superior to the best experimental measurements at ambient temperature.
Organization Units (connected with the publication): Universität Rostock
ISSN: 00268976
Publisher DOI: 10.1080/00268970701744584
Appears in Collections:6 - Bibliographic Data - Publications of the HSU Researchers (before HSU)

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