# OPTICAL OPTICAL DOUBLE RESONANCE (OODR) OF THE LITHIUM DIMER: THE $a^{3}\Sigma_{u}^{+}$ AND $2^{1}\Sigma_{u}^{+}$ STATES

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/18884

Files Size Format View
1998-RC-08.jpg 153.2Kb JPEG image

 Title: OPTICAL OPTICAL DOUBLE RESONANCE (OODR) OF THE LITHIUM DIMER: THE $a^{3}\Sigma_{u}^{+}$ AND $2^{1}\Sigma_{u}^{+}$ STATES Creators: Linton, C.; Martin, F.; Crozet, P.; Ross, A. J.; Russier, I.; Yiannopoulou, A.; Li, L.; Lyyra, A. M. Issue Date: 1998 Publisher: Ohio State University Abstract: Perturbation Facilitated Optical Optical Double Resonance (PFOODR) has been used to access the $v=0,1$ and 2 levels of the $2^{3}\Pi_{3}$ state of $^{7}Li_{2}$ via mixed $A^{1}\Sigma_{u}^{+}\sim b^{3}\Pi_{a}$ levels. Fluorescence to the $a^{3}\Sigma^{+}_{a}$ state, recorded at high resolution on a Fourier transform spectrometer, gave transitions to the $v=0-9$ levels of the $a^{3}\Sigma^{+}_{u}$ state and allowed us to observe levels very close to the dissociation limit. A Near Dissociation Expansion (NDE) technique was used to determine the dissociation energy. The results of our analysis will be presented and the correlation with recent photoassociation data will be discussed. In a separate OODR experiment, fluorescence from the $5d^{1}\Pi_{g}$ Rydberg state of $^{7}Li_{2}$ to the $C^{1}\Pi_{a}$ and $2^{1}\Sigma_{u}^{+}$ Double Minimum'' states was examined allowing us to extend the previous analysis of the $2^{1}\Sigma_{u}^{+}$ state. The spectra also provided new information on the $v=0$ and 1 levels of the $C^{1}\Pi_{a}$ state, from which we were able to make a more precise determination of its potential minimum and $T_{a}$ value. Description: $^{a}$ Current address: Laboratoire Aim\'{e} Cotton (CNRS UPR3321), Campus d'Orsay, B\^{a}timent 505, 91405 Orsay, France Author Institution: Physics Department, University of New Brunswick; Laboratoire de Spectrom\'{e}trie lonique et Mol\'{e}culaire (CNRS UMR5579), Universit\'{e} Lyon I.; Department of Modern Applied Physics, Tchinghua University; Department of Physics, Temple University URI: http://hdl.handle.net/1811/18884 Other Identifiers: 1998-RC-08