“…This result suggests that the minimum of the AO+ state lies above the AO minimum and the two respective PE curves do not intersect. Thus the configuration of the AO+ and AO PE curves in HgCd appears to be similar to that in HgZn [13], but different from the configuration in Hg2 where the two curves were found to intersect and the AO minimum lay about 13.7 cm ' above the AO+ minimum [12].…”