Molecular beam optical Stark spectroscopy of MoN

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Abstract
A high resolution optical spectroscopic study of a molybdenum mononitride, MoN, supersonic molecular beam sample has been performed. The Ree (0.5) branch feature of the (0,0) A 4Π3/2–X 4 Σ1/2− band system for 98MoN was recorded as a function of static electric field strengths of up to 3.5 kV/cm. The splittings and shifts were analyzed to produce values of the permanent electric dipole moment of 4.56(9) and 3.38(7)D for the A 4Π3/2 and X 4Σ1/2− states, respectively. The field free splittings for the 95MoN and 97MoN isotopic forms were interpreted as arising from X 4Σ1/2 − magnetic hyperfine effects and the resulting spin density of 5.09(8) a.u.−3 was determined. Comparisons with predictions from theoretical models are given.