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Accurate global fit of the H4 potential energy surface.
- Source :
-
Journal of Chemical Physics . 9/1/1994, Vol. 101 Issue 5, p4004. 7p. - Publication Year :
- 1994
-
Abstract
- A global potential energy surface (PES) for the adiabatic ground state of the H4 system which fit published ab initio data [Boothroyd, et al. J. Chem. Phys. 95, 4331 (1991)] at a quantitative level has been obtained (root-mean-square error about 2 mhartree or 1–2 kcal/mol), and without any quantity of ad hoc character, preserving the accuracy of the ab initio points. The global fitting procedure used here is an extension of the corresponding procedure for triatomic systems including the functional form previously proposed by the authors. The global H4 PES obtained here is totally symmetric with respect to permutations of the hydrogen atoms and satisfies the criteria needed to be used in scattering calculations. [ABSTRACT FROM AUTHOR]
- Subjects :
- *POTENTIAL energy surfaces
*HYDROGEN
*QUANTUM chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 00219606
- Volume :
- 101
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Journal of Chemical Physics
- Publication Type :
- Academic Journal
- Accession number :
- 7647168
- Full Text :
- https://doi.org/10.1063/1.467518