# THE HIGH VIBRATIONAL LEVELS OF THE $A^{1}{\Sigma_{u}}^{+}$ STATE OF $Li_{2}$

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 dc.creator Linton, C. en_US dc.creator Martin, F. en_US dc.creator Ross, A. J. en_US dc.creator Russier, I. en_US dc.creator Crozet, P. en_US dc.creator Churassy, S. en_US dc.creator Bacis, R. en_US dc.date.accessioned 2007-11-20T17:13:30Z dc.date.available 2007-11-20T17:13:30Z dc.date.issued 1995 en_US dc.identifier 1995-TF-07 en_US dc.identifier.uri http://hdl.handle.net/1811/29799 dc.description Author Institution: University of New Brunswick, Box 4400, Fredericton, N.B., Canada, E3B 5A3.; Université Lyon I, Campus la Doua, 69622 Villeurbanne Cedex, France en_US dc.description.abstract In experiments designed initially to examine the potential barrier in the $B^{1}\Pi_{u}$ state of $Li_{2}$, two tunable dye lasers were used to excite the $F^{1}{\Sigma_{g}}^{+}$ state via the $X^{1}{\Sigma_{g}}^{+} \to A^{1}{\Sigma_{u}}^{+} \to F^{1}{\Sigma_{g}}^{+}$ double resonance. The resulting fluorescence was examined in the $8000-10000 cm^{-1}$ region at high resolution using a Fourier Transform spectrometer. Several spectra showed long vibrational progressions which were found only to occur when the excited $F^{1}{\Sigma_{g}}^{+}$ level was nearly in resonance with an $E^{1}{\Sigma_{g}}^{+}$ "shelf state" level of the same J. The lower levels of the vibrational progressions were identified as high vibrational levels (v > 30) of the $A^{1}{\Sigma_{u}}^{+}$ state. In further experiments, different vibrational levels of $F^{1}{\Sigma_{g}}^{+}$ and $E^{1}{\Sigma_{g}}^{+}$ were excited systematically at J corresponding to the crossing point of the 2 states and very long progessions in the $A^{1}{\Sigma_{u}}^{+}$ state, up to v > 80, were observed almost to the dissociation limit. The results and the analysis of the spectra will be presented and the near dissociation behaviour of the $A^{1}{\Sigma_{u}}^{+}$ state will be discussed. en_US dc.format.extent 63855 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title THE HIGH VIBRATIONAL LEVELS OF THE $A^{1}{\Sigma_{u}}^{+}$ STATE OF $Li_{2}$ en_US dc.type article en_US