The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The rovibrational structure of the ground state of the non-symmetrical isotopomers of CuCl 2 ( 35 Cl 63 Cu 37 Cl and 35 Cl 65 Cu 37 Cl) has been investigated. Laser induced fluorescence spectra were recorded on a BOMEM DA03 Fourier transform spectrometer in the range 10000-16500 cm -1 for ν 1 = 0-12 and ν 3 = 0-8. A non-linear least-squares minimization allows to obtain both rovibrational constants and isotopic factors by fitting data of one symmetrical isotopomer of CuCl 2 with the corresponding non-symmetrical isotopomer having the same copper isotope. The RMS deviation is better than 0.029 cm -1 for each case. We discuss the isotopic effects and show that breakdown of the Born-Oppenheimer approximation has to be considered.