Recurrences in the autocorrelation function governing the ultraviolet absorption spectra of O3

Abstract
The approximate dipole–dipole autocorrelation function corresponding to UV photoabsorption in the Huggins and Hartley bands of ozone is obtained by Fourier transformation of the T=195 K data measured by Freeman, Yoshino, Esmond, and Parkinson [Planet. Space Sci. 3 2, 239 (1984)]. Weak structure seen at vibrational resolution in the broad absorption bands, previously unassigned, is shown to correspond predominantly to 4–5 small recurrent features in the autocorrelation function during the first 130 fs. These time‐dependent features are each assigned to particular types of unstable periodic or nearly periodic orbits in the classical dynamics.