Knowledge Bank

The valence structure of the lowest $\mathrm{<mrow\; data-mjx-texclass="ORD">1</mrow>}\Sigma +$ states of KH, RbH, and CsH have been computed by a configuration Interaction method using effective core potentials. The core potentials of Kahn and $co-workers1$ were modified to have the proper long-range $behavior2$ and Include the effect of core polarization. The potential curves for the $X1\Sigma +$ and $A1\Sigma +$ stales agree with measured values generally to within 0.1 eV. Also, the $A1\Sigma +-X1\Sigma +$ transition moments of CsH compare favorably with the results of laser-excited fluorescence $experiments.3$