title: The permanent electric dipole moments of calcium monohydride, CaH.
abstract: Numerous branch features in the (0,0) A 2Pi-X 2Sigma+ band system of calcium monohydride CaH have been studied by optical Stark spectroscopy. The Stark shifts, Stark splittings, and appearance of electric-field-induced transitions in the high resolution laser-induced fluorescence spectra are analyzed to produce values for the magnitude of the permanent electric dipole moments mid R:micromid R: of 2.94(16) D and 2.372(12) D for the X 2Sigma+(v=0) and A 2Pi(v=0) states, respectively. A comparison with values predicted from a semiempirical electrostatic model and previous ab initio calculations for mid R:micromid R: (X 2Sigma+) is presented. The change in mid R:micromid R: upon excitation from the X 2Sigma+ state to the A 2Pi state is rationalized using a simple molecular orbital description.
authors.affiliation: Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604. USA. Tsteimle@ASU.edu
authors.forename: T C
authors.initials: TC
authors.lastname: Steimle
authors.forename: Jinhai
authors.initials: J
authors.lastname: Chen
authors.forename: Jamie
authors.initials: J
authors.lastname: Gengler
mesh_terms: D002118:Calcium / Q000032:analysis / Q000737:chemistry*; D003198:Computer Simulation; D004563:Electrochemistry / Q000379:methods*; D004574:Electromagnetic Fields; D006859:Hydrogen / Q000032:analysis / Q000737:chemistry*; D008956:Models, Chemical; D008958:Models, Molecular; D013050:Spectrometry, Fluorescence; D055672:Static Electricity
chemical_list: D006859:Hydrogen; D002118:Calcium