Electron Spin Resonance of γ-Irradiated Glycylglycine

Abstract
The electron paramagnetic resonance spectra of a gamma‐irradiated single crystal of α‐glycylglycine have been measured at 9, 24, and 29 kMc/sec for various orientations of the crystal in the external magnetic field. From analysis of the spectroscopic splitting factors and the hyperfine interaction constants, the free radical produced by gamma irradiation is found to be: [Complex chemical formula] The electron spin density on the —ĊH carbon atom is evaluated as approximately 0.75.