AN ANALYTIC-FUNCTION FOR THE 3-BODY POTENTIAL OF HE-3

Citation
Mj. Cohen et Jn. Murrell, AN ANALYTIC-FUNCTION FOR THE 3-BODY POTENTIAL OF HE-3, Chemical physics letters, 260(3-4), 1996, pp. 371-376
Citations number
20
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
ISSN journal
00092614
Volume
260
Issue
3-4
Year of publication
1996
Pages
371 - 376
Database
ISI
SICI code
0009-2614(1996)260:3-4<371:AAFT3P>2.0.ZU;2-7
Abstract
An accurate representation of the three-body potential for the ground state of neutral Hes has been obtained by fitting to high quality ab i nitio data. The calculations show that the 3rd order, triple-dipole di spersion energy is of minimal importance in comparison with the three- body exchange term except at very large internuclear separations. Damp ing of the triple-dipole term is better described by a product of damp ing functions in each of the three internuclear distances than by a si ngle damping function with the perimeter of the triangle as a variable .