EPR Study of Hazelnut Species Irradiated with UV and Gamma Rays

In this study, we aimed to investigate the electron paramagnetic resonance (EPR) spectra of a hazelnut species called Kalinkara grown in Ordu, a city in the eastern black sea region of Turkey. The hazelnut was subjected to various doses of gamma rays and later at certain times the EPR spectra were recorded at room temperature. Also, the EPR spectra were recorded when the unirradiated species was subjected to ultraviolet (UV) light for a period of time. As a result of both type of irradiation, the damage centers were observed in the EPR spectra. The g factors were also obtained for all spectra. No significant change in g factors lead us to the result that the same damage centers were formed when the species were exposed to both gamma and UV rays, separately. The intensity of EPR spectra for the Kalinkara hazelnut species changed according to the life span of the damage centers. When the UV light was turned off, the intensity decreased as well.