[Pharamagnetic centers developing during irradiation of gamma-phos]

The ESR spectra's of X-irradiated radioprotector gamma-phos have been studied. Using the analysis of relaxation effects in this sample irradiated at room temperature three paramagnetic centers have been discovered. One of these centers is classed with the free radical approximately CH2--CH--CH2 approximately (R1)-G(R1) value decreases with a decrease of irradiation temperature. Free radicals R1 are not oxidized in the air. Two other of paramagnetic centers have not been identified.