Steimle Timothy C, Zhang Ruohan, Wang Hailing
Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, USA.
State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, 200062, China.
J Chem Phys. 2014 Jun 14;140(22):224308. doi: 10.1063/1.4878414.
The (0,0) A(2)Π-X (2)Σ(+) band of a cold molecular beam sample of magnesium monodeuteride, MgD, has been recorded field-free and in the presence of a static electric field of up to 11 kV/cm. The lines associated with the lowest rotational levels are detected for the first time. The field-free spectrum was analyzed to produce an improved set of fine structure parameters for the A(2)Π (v = 0) state. The observed electric field induced splittings and shifts were analyzed to produce permanent electric dipole moments, μ(el) of 2.567(10)D and 1.31(8)D for A(2)Π (v = 0) and X(2)Σ(+)(v = 0) states, respectively. The recommended value for μ(el)(X(2)Σ(+) (v = 0)) for MgH, based upon the measured value for MgD, is 1.32(8)D.
