Knowledge Bank

Numerous branch features in the (0,0) band of the $B2\Sigma +$ - $X2\Sigma +$ system and in the (0,0) band of the $A2\Pi$ - $X2\Sigma +$ system of calcium monohydride, CaH, have been recorded at near the natural line width limit in the presence of a tunable static magnetic field of up to 1200 Gauss. The observed Zeeman induced shifts were successfully modeled using the traditional effective Hamiltonian to account for the $\Delta$v=0 interaction and explicit inclusion of the interaction matrix elements for the perturbations between the (v=1) $A2\Pi$ and (v=0) $B2\Sigma +$ states. A comparison is made with the analysis of the Zeeman effect of the (0,0) $B2\Sigma +$ - $X2\Sigma +$ $R1$ (0.5) branch feature}, 2376-2383 (1999).}'}, 289-309 (1999).}.