Molecular resonances observed in the predissociation of Cs-2

Abstract

Very cold molecular beam of Cs-2 is generated by a high temperature supersonic jet source. State-specific photofragment yield spectrum is obtained in the orange band of Cs-2. Asymmetric line shapes are observed. The Fano line shape parameter, q, shows a gradual sign change, which is called ''q-reversal''. A very broad absorption band which has about 50 cm(-1) width is observed and explained to occur through the perturbation by the D (1) Sigma(u)(+) state. The complex resonance line shapes are attributed to the interfering resonances.