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OBSERVATION OF $\Omega = 1/2$ STATES IN NiH THROUGH COLLISIONALLY INDUCED FLUORESCENCE

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dc.creator Richard, C. en_US
dc.creator Crozet, P. en_US
dc.creator Ross, A. J. en_US
dc.creator Tokaryk, D. W. en_US
dc.date.accessioned 2011-07-12T17:36:42Z
dc.date.available 2011-07-12T17:36:42Z
dc.date.issued 2011 en_US
dc.identifier 2011-WG-02 en_US
dc.identifier.uri http://hdl.handle.net/1811/49573
dc.description Author Institution: Universite Lyon 1; CNRS; LASIM UMR 5579, 43 Bd du 11 novembre 1918, F-69622 Villeurbanne, France; Department of Physics and Center for Laser, Atomic, and Molecular Sciences, University of New Brunswick, Fredericton, Canada E3B 5A3 en_US
dc.description.abstract Fourier transform spectra of collisionally induced fluorescence following isotopically selective laser excitation of NiH at $\sim 550$~nm has allowed us to locate an exited $\Omega' = 1/2$ state of NiH lying 17900~cm$^{-1}$ above the electronic ground state. We identify this as $v = 0$ of a $^2\Pi_{1/2}$ state, originating from the Ni$^+$ $3d^84s^1$ $^2$F configuration, from the ab initio studies published by Zou and Liu in 2007. Emission from the [17.9]0.5 state occurs to $v''= 0$ and 1 of the $^2\Sigma^+$ and $^2 \Pi_{1/2}$ low-lying ligand field states, locating hitherto elusive $^2 \Pi_{1/2}$ $f$ parity levels to within 0.01~cm$^{-1}$. Collisionally induced fluorescence following laser excitation at lower energies has been recorded in the presence of a magnetic field (0.7~$-$~1~Tesla), at Doppler resolution. The partially resolved Zeeman patterns have been used to derive effective Lande factors $g_J$ for the $v=0$ and 1 levels of the low-lying $\Omega'' = 5/2$ and $3/2$ states (${^2\Delta}$ and $^2\Pi$ states from Ni$^+$ $3d^9$). These are compared with predictions from a revised fit of zero-field energy levels, now including the new observations concerning the $\Omega'' = 1/2$ states. en_US
dc.language.iso en en_US
dc.title OBSERVATION OF $\Omega = 1/2$ STATES IN NiH THROUGH COLLISIONALLY INDUCED FLUORESCENCE en_US
dc.type Article en_US
dc.type Image en_US
dc.type Presentation en_US