Electron affinity of the sodium atom within the coupled-channel hyperspherical approach.
We present a nonadiabatic calculation, within the hyperspherical adiabatic approach, for the ground state energy of the alkali-metal negative ions. An application to the sodium negative ion (Na-) is considered. This system is treated as a two-electron problem in which a model potential is used for the interaction between the Na+ core and the valence electrons. Potential curves and nonadiabatic couplings are obtained by a direct numerical calculation, as well as the channel functions. An analysis of convergence is made and comparisons of the electron affinity with results of prior work of other authors are given.
Laboratório Interdisciplinar de Computação Científica, Faculdades COC, Rua Abrãao Issa Halack 980, 14 096-175 Ribeirão Preto, SP, Brazil.
J J
JJ
De Groote
Mauro
M
Masili