Author/Authors :
Campargue، نويسنده , , Alain and Biennier، نويسنده , , Ludovic and Kachanov، نويسنده , , Alexander and Jost، نويسنده , , Rémy and Bussery-Honvault، نويسنده , , Béatrice and Veyret، نويسنده , , Vincent and Churassy، نويسنده , , Serge and Bacis، نويسنده , , Roger، نويسنده ,
Abstract :
The rotationally resolved absorption spectrum of two bands of the oxygen dimer near 630 and 578 nm have been recorded by intracavity laser absorption spectroscopy both in a supersonic slit expansion of pure O2 and in a cell cooled at 77 K. These bands correspond to the transitions [O2(1Δg)v=0]2←[O2(3Σg−)v=0]2 and [O2(1Δg)v=0–O2(1Δg)v=1]←[O2(3Σg−)v=0]2 . From the extension of the highly congested rotational structure, the dissociation energy of the ground and excited states are estimated to be 80 and 40 cm−1, respectively. These values agree reasonably well with the results of ab initio calculations of the potential energy surface.
