916510.fig.001a
(a)  Collinear
916510.fig.001b
(b) T-shaped
Figure 1: (a) Adiabatic Cl-H2 potential energy surfaces, as functions of the Cl-H2 distance , for (a) collinear and (b) T-shaped geometries. Solid lines indicate the potential energy for the Cl electronic configuration in which the hole is aligned with the space-fixed -axis; dashed lines indicate the potential energy for the Cl electronic configuration in which the hole is aligned with the space-fixed -axis. In both panels, is held fixed at .