Abstract
The oxygen fundamental collision-induced absorption bandshapes are simulated for temperatures between 90 and 296 K. It is shown that the use of line-mixing formalism allows nice simulation of the observed bandshapes including minor regular ripples superimposed on the smooth continuum in the region of the S and O branches. Weak absorption due to tightly bound oxygen dimers manifests itself as pseudodiatomic PR-like structure atop the monomer Q branch. Consideration of the temperature variations of this structure allows the oxygen-dimer effective rotational constant 〈B〉 to be roughly characterized. The value of 〈B〉 is notably lower than the ground state value B0 retrieved recently by high-resolution laser probe of oxygen dimers formed in a supersonic slit expansion. This may be considered an indication of significant deviation of the (O2)2 structure averaged over the ensemble of thermally excited dimers from that characterizing the ground state.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call