We present an adaptive density-guided approach for the construction of Born-Oppenheimer potential energy surfaces (PES) in rectilinear normal coordinates for use in vibrational structure calculations. The procedure uses one-mode densities from vibrational structure calculations for a dynamic sampling of PESs. The implementation of the procedure is described and the accuracy and versatility of the method is tested for a selection of model potentials, water, difluoromethane and pyrimidine. The test calculations illustrate the advantage of local basis sets over harmonic oscillator basis sets in some important aspects of our procedure.
Titolo: | An adaptive density-guided approach for the generation of potential energy surfaces of polyatomic molecules | |
Autori: | ||
Data di pubblicazione: | 2009 | |
Rivista: | ||
Abstract: | We present an adaptive density-guided approach for the construction of Born-Oppenheimer potential energy surfaces (PES) in rectilinear normal coordinates for use in vibrational structure calculations. The procedure uses one-mode densities from vibrational structure calculations for a dynamic sampling of PESs. The implementation of the procedure is described and the accuracy and versatility of the method is tested for a selection of model potentials, water, difluoromethane and pyrimidine. The test calculations illustrate the advantage of local basis sets over harmonic oscillator basis sets in some important aspects of our procedure. | |
Handle: | http://hdl.handle.net/11368/2870421 | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1007/s00214-009-0532-1 | |
Appare nelle tipologie: | 1.1 Articolo in Rivista |