Ceylan, Y.Usta, K.Ceylan, N.Usta, A.Koc, Y.2020-03-262020-03-2620170587-42461898-794Xhttps://dx.doi.org/10.12693/APhysPolA.132.1211https://hdl.handle.net/20.500.12395/348953rd International Conference on Computational and Experimental Science and Engineering (ICCESEN) -- OCT 19-24, 2016 -- Antalya, TURKEYIn the present study, calix[4]arene and its derivate 25,27-di(4-nitrobenzyl)-26,28-dihydroxycalix[4]arene were irradiated for 72 hours by Co-60 gamma rays at dose rate of 0.720 kGy/h. These irradiated samples were analyzed by EPR method and it was found that one type of radical was produced in calix[4]arene, and two type of radicals were produced in 25,27-di(4-nitrobenzyl)-26,28-dihydroxycalix[4]arene. The measurements were performed in the temperature range of 273-400 K using x-band EPR spectrometer. It was observed that the spectra, obtained from two samples, have very weak temperature dependence. Hyperfine and g parameters were calculated for two samples.en10.12693/APhysPolA.132.1211info:eu-repo/semantics/openAccessArticle132312111213Q4WOS:000413982900103Q3