15min:

JINHAI CHEN, JAMIE GENGLER AND TIMOTHY STEIMLE, Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287; JOHN M. BROWN, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford, United Kingdom OX1 3QZ.

Numerous branch features in the (0,0) band of the B^{2 +} - X^{2 +} system and in the (0,0) band of the A² - X^{2 +} 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 v=0 interaction and explicit inclusion of the interaction matrix elements for the perturbations between the (v=1) A² and (v=0) B^{2 +} states. A comparison is made with the analysis of the Zeeman effect of the (0,0) B^{2 +} - X^{2 +} R₁ (0.5) branch feature'.