Abstract
Potassium bicarbonate single crystals were gamma irradiated and studied by electron paramagnetic resonance technique at room temperature. The species, responsible for the electron paramagnetic resonance spectrum, were found to be C ̇ O 2 − and H C ̇ O 3 radicals. These species were found to be double in the unit cells of the single crystals. The principal values of the g tensors, the 13 C hyperfine tensors in C ̇ O 2 − and the hydrogen hyperfine tensors in H C ̇ O 3 were found for each site. The radicals, were found to be quite stable at room temperature and the hyperfine tensors of the 13 C nucleus were well found for the crystals of natural abundancies of the constituent nuclei in C ̇ O 2 − radical, but not in H C ̇ O 3 . This is attributed to the smallness of the hyperfine constant of the 13 C nucleus in the H C ̇ O 3 radical.
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