Abstract:
The novelty of the study is that the ordering that occurs in a PET film under the action of
SHI irradiation manifests itself as an increase in the integral intensity of intrinsic luminescence. The
Urbach behaviour of the red shift of the absorption edge is used as a baseline for further analysis of
experimental optical transmission spectra of PET films irradiated by swift heavy ions (SHI) previously
published by the authors. Negative deviations of the experimental spectra from the Urbach baseline
in the visible and UV parts of the spectrum are attributed to enhanced by SHI irradiation intrinsic
luminescence. The observed dependence of the integral intensity of luminescence of irradiated PET
films on the SHI fluence and ion charge provides further confirmation of the presence of SHI-induced
ordering of the molecular structure in SHI latent tracks.
