FOURIER TRANSFORM SPECTRA OF COPPER DICHLORIDE: RENNER-TELLER EFFECT IN ROVIBRONIC LEVELS OF THE GROUND STATE

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 Title: FOURIER TRANSFORM SPECTRA OF COPPER DICHLORIDE: RENNER-TELLER EFFECT IN ROVIBRONIC LEVELS OF THE GROUND STATE Creators: Crozet, P.; Bosch, E.; Ross, A. J.; Brown, J. M. Issue Date: 2000 Abstract: High-resolution Fourier transform spectra of the laser-induced fluorescence of $^{63}Cu^{37}Cl_{2}$ produced in a cell have been recorded following excitation of a single vibronic level of the $E$ $^{2} \Pi_{u}$ electronic state. Fluorescence occurs in combination bands to a broad spread of rovibrational levels in the ground electronic state, $X ^{2}\Pi_{g(3/2)}$. A global rovibronic model is proposed for the ground state based on an effective Hamiltonian, which fits experimental data (2782 fluorescence lines, lower state quantum numbers: $\nu_{1} = 0 - 6, \nu_{2} = 0 - 2, \nu_{3} = 0 - 4,$ and $J = 80{1\over 2} - 4{1\over 2}$) with a root mean square error of 0.019\ cm $^{-1}$. Vibrational, rotational and Renner-Teller parameters are obtained (e.g. $\omega_{2} = 95.195 cm^{-1}, B_{e} = 0.055106(3) cm^{-1}, \epsilon = \cdot 0.1893$), A revised value for the equilibrium internuclear distance Cu-Cl is deduced: $r_{c} (Cu-Cl)=0.20341(3)nm$. URI: http://hdl.handle.net/1811/19969 Other Identifiers: 2000-WH-05