The Quadrupole Moment ofLi7

Abstract
The quadrupole interaction energy eqQ for Li7 in Li2 has been reported to be positive. In an attempt to determine Q(Li7) a calculation of q has been made using two approximate wave functions for Li2. One of these is a Heitler-London function including inner shells and the other a twelve term variational function. The two functions lead to dissociation energies of 0.27 ev and 0.48 ev, respectively. The experimental value is 1.14 ev.