Accession Number : AD0623398

Title :   PATH INTEGRAL CALCULATION OF THE TWOPARTICLE SLATER SUM FOR HE4,

Corporate Author : ILLINOIS UNIV URBANA DEPT OF COMPUTER SCIENCE

Personal Author(s) : Fosdick,Lloyd D. ; Jordan,Harry F.

Report Date : 20 AUG 1965

Pagination or Media Count : 44

Abstract : The Wiener integral formulation combined with Monte Carlo sampling has been used to compute the two-particle Slater sum for He4 for temperatures ranging from 273K down to 2K, the lower practical limit for this computational method. This is equivalent to a calculation of the density independent part of the pair distribution function. A Lennard-Jones 6-12 potential has been used to describe the interaction. Contributions from exchange were found negligible at 5K and above. Comparisons with the WignerKirkwood expansion are made. The second virial coefficients derived from these results are within two per cent or three per cent of the results obtained from the usual phase shift calculation. (Author)

Descriptors :   (*KINETIC THEORY, HELIUM), (*INTEGRALS, KINETIC THEORY), (*QUANTUM STATISTICS, INTEGRALS), (*HELIUM, KINETIC THEORY), EQUATIONS OF STATE, STATISTICAL MECHANICS, THERMODYNAMICS, CRYOGENICS, POTENTIAL THEORY, MONTE CARLO METHOD, SAMPLING

Distribution Statement : APPROVED FOR PUBLIC RELEASE