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Analysis Study Research Paper | Physics Science | India | Volume 12 Issue 9, September 2023
Optical and Structural Studies of Kapton Polymer Irradiated by 1.2 MeV Gamma Radiations
Abstract: The virgin and Gamma irradiated kapton polymer samples were analysed by UV-Visible spectroscopy (JASCO, V-530) in the wavelength range of 190-900 nm to observe the energy gap variation with increasing dose. The structural aspect of the Kapton was also analysed by using X-ray diffraction technique. The XRD measurements were made on PW-1830 machine by using monochromatic CuK?(8.04 keV and ? = 0.154 nm) radiation. From the optical studies it was observed that the absorption edge is shifting in an unsymmetric manner after irradiation. The decrease in direct and indirect energy band gaps has been observed after irradiation may be due to the creation of electronic disorders. The value of direct energy band gap is found to be higher than the indirect band gap. The XRD patterns of gamma irradiated Kapton polymer samples at different doses shows that the overall peak intensity of the samples at 500 kGy dose is less as compared to the sample irradiated at 1500 kGy dose. However, at dose level 2000 kGy the peak intensity again increases and peak width decreases .However, a decrease in the overall peak intensity and a shift in the angular position towards the higher angle side can be explained in terms of a decrease in the lattice spacing.
Keywords: Gamma irradiation; kapton; UV-Visible spectroscopy; XRD
Edition: Volume 12 Issue 9, September 2023,
Pages: 396 - 401