Correlation in the ground state of Li^-, Na^-and K^-

Abstract

The ground-state wavefunctions for Li-, Na- and K- are calculated using the hyperspherical method. They are analysed and compared with the ground state as well as the first 1S resonance in H- to reveal the effect of correlation. In order to perform a quantitative comparison an absolute measure of angular and radial correlation based on statistical methods is used and its relevance to characterise correlation in the ground states is discussed.