Abstract

The electron paramagnetic resonance of γ-irradiated single crystals of K2C2O4.H2O and (NH4)2C2O4.H2O has been studied. The spectra show interesting microwave power saturation effects. The singlet spectrum is attributed to the C2O4 - radical derived from the C2O4 -- ion. The principal g-values are determined to be 1·998, 2·0028 and 2·0004. Certain weak lines are observed with different power saturation and interpreted as due to OH radicals derived from water molecules in the crystal lattice.

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