OPTICAL STARK SPECTROSCOPY OF NICKLE MONOHYDRIDE, NiH\thanks{Supported by NSF(TCS-ASU).}
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Date
2008
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Ohio State University
Abstract
Sometimes ago the MIT group analyzed the Doppler limited optical Stark Spectrum for the $B^{2}\Delta_{5/2}$-$X^{2}\Delta_{5/2}$(1,0) $Q$(2.5) line of NiH to determine the permanent electric dipole moments, $nu$, of 2.4$\pm$0.1 D and 0.3$\pm$0.1 D for the $X^{2}\Delta_{5/2}$ and $B^{2}\Delta_{5/2}$ states, respectively.}\ The ground state value of $nu$ is routinely predicted to assess the quality of electronic structure predictions.}\ In an effort to reduce the uncertainty in the experimental value of $nu$ we have analyzed the optical Stark spectrum of the $Q$(2.5) and $P$(3.5) of a molecular beam sample. A molecular beam was generated by skimming the output of a laser ablation/supersonic expansion. The dipole moments were determined to be 2.44$\pm$0.02 D and 0.36$\pm$0.02 D for the $X^{2}\Delta_{5/2}$ and $B^{2}\Delta_{5/2}$ states, respectively. The observed trends in the $nu$ value for the ground state of the first row transition metal monohydrides will be rationalized.
Description
J.A. Gray, S.F. Rice and R.W. Field, J. Chem. Phys., 82,4717 (1985).C.V. Diaconu, A.E. Cho, J.D. Doll and D.L. Freeman, J. Chem. Phys., 121, 10026 (2004).
Author Institution: Chemistry and Biochemistry, Arizona State University, Tempe, AZ USA 85287
Author Institution: Chemistry and Biochemistry, Arizona State University, Tempe, AZ USA 85287