One of the distinctive nuclear track detectors (SSNTDs) is the Bayfol (DPF) which is distinct by its high strength and stability. We used UV spectroscopic methodology to get information concerning the influence of  doses (8-50 kGy) on the optical character of DPF films. The alternations of Urbach energy (Eu), optical band gap (Eg) and refractive index (n) with the  dose were interpreted. An increase in both Eu (0.26-0.61 eV) and n (1.5663-1.5764) associated with a reduction of Eg (6.71- 6.58 eV) was noticed when increasing the dose up to 50 kGy. We assign these trends to the dominance of chain crosslinks. The  radiation encourages the transesterification interaction between PC and Ps leading to a more compact structure of the Bayfol copolymer. Additionally, we used the CIE technique to calculate the color differences among the uncoloured pristine and the irradiated films. The induced crosslinking formed color centres that led to the increase of the color difference (E) values to be more than 5, thus applicants the Bayfol in dosimetry.