Estudo de um formalismo para discretizar eficientemente as equações integrais do Método da Coordenada Geradora Hartree-Fock / The study of a formalism to discretize efficiently the integral equations of the generator coordinate Hartree-Fock method

AUTOR(ES)

Alexandre Pereira Chahad

DATA DE PUBLICAÇÃO

2009

RESUMO

The search for high quality basis set is made by several groups since the quality of the basis sets is a very important factor to obtain accurate results for atomic and molecular properties. The basis sets used in this work are designed by using the polynomial Generate Coordinate Method and were constructed with the aim to improve the flexibility of a basis sets to describe the valence shell. A new methodology for the search of this basis set is proposed in this work. This new methodology makes the search for this basis set less artisanal with the introduction of the Simplex Method in our basis generator program, GENBASIS. This introduction minimizes the time used in the search for these quality basis set. The application of our basis sets in atomic and molecular calculations were compared with the most used basis sets in the literature and were performed by using different level of calculations, namely, from Hartree-Fock to Density Functional Theory.

ASSUNTO(S)

equações integrais do método da coordenada geradora hartree-fock generator coordinate hartree-fock method integral equations of the generator coordinate hartree-fock method discretization of integral equations método da coordenada geradora hartree-fock discretização de equações integrais

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