UV-VIS AND FTIR SPECTRAL STUDIES OF CR-39 PLASTICS IRRADIATED WITH X-RAYS

A study has been made on the UV-VIS and FTIR spectra of CR-39 plastics irradiated with 50 kVp tube X-rays in the dose range 0-45 MR The opti cal transmittance over the wavelength region of 200-1000nm decreases w ith the X-ray exposure, much greater decrease being observed in the UV region. The IR absorption spectra of the irradiated samples show the presence of two new strong absorption bands at the frequencies 655 and 2340 cm(-1), indicative of the gas CO2 produced inside the plastic. T he absorbance of these bands increases linearly with the X-ray dose.