Spectroscopic and electrical changes in Lr-115 type II nuclear track detector before and after gamma radiation

Abstract

In this research, the changes in the structural, spectroscopic, and electrical properties of the Lr-115 type II nuclear track detector were investigated before and after gamma irradiation. The FT-IR, X-ray, and UV–Visible spectra were recorded and studied in detail before and after irradiation process. We have arrived at the following results, the X-ray diffraction reveals that irradiated Lr-115 diffraction displays an increase in peak intensity and width at half maximum which is commonly associated with polymer crystallinity. After irradiation, the IR bands at 1447 cm−1 assigned to O-NO2 rapidly decreased, and the band at 802 cm−1 due to C–O–C shifted to 784 cm−1. From UV–Visible measurements, as irradiated doses increase, the surface plasmon absorption in irradiated samples causes the extinction coefficient (k) of the sample peak at = 199 nm to increase with increasing wavelength up to 221 nm. With increasing gamma dose, the obtained data revealed a decrease in the optical energy gap (Eg) and increases of the number of carbon atoms in a formed cluster. Increasing of the gamma doses caused an increase in the AC electrical conductivity. Furthermore, the dielectric constant was studied at room temperature as a function of the dose variation. The results indicate that gamma-ray irradiations improve the optical and electrical properties of Lr-115.