The 23Πg–b3Πuand 13Δg–b3ΠuTransitions in7Li2: Analysis of theb3ΠuState forv= 0–27

✍ Scribed by I. Russier; A. Yiannopoulou; P. Crozet; A.J. Ross; F. Martin; C. Linton

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 247 KB
• Volume: 184
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1997.7309

✦ Synopsis

Two double resonance techniques, perturbation facilitated optical-optical double resonance (PFOODR) and collision induced fluorescence (CIF), have been used to excite the 2 3 P g (PFOODR only) and 1 3 D g states of 7 Li 2 . Fluorescence from each of these states to the b 3 P u state has been studied at high resolution using Fourier transform spectroscopy. Transitions were observed and analyzed up to £ Å 27 in the b 3 P u state, and the PFOODR and CIF data have been combined to give an improved set of Dunham coefficients from which an RKR potential has been calculated. Predissociation by the a 3 S / u state, which broadens and shifts the b 3 P u levels, has been studied in detail. The level shifts to £ Å 27 have been calculated and the observed values are shown to follow the theoretically predicted pattern. The isotope effect on the predissociation has also been examined. The 1 3 D g state has been analyzed for 0 £ £ £ 25 and molecular constants and an RKR potential have been calculated.