Gamma Irradiation Damage Centres in KHCO3 Single Crystals

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 ̇CO<inf>2</inf>- and ḢCO<inf>3</inf> radicals. These species were found to be double in the unit cells of the single crystals. The principal values of the g tensors, the 13C hyperfine tensors in ̇CO<inf>2</inf>- and the hydrogen hyperfine tensors in ḢCO<inf>3</inf> were found for each site. The radicals, were found to be quite stable at room temperature and the hyperfine tensors of the 13C nucleus were well found for the crystals of natural abundancies of the constituent nuclei in ̇CO<inf>2</inf>- radical, but not in ḢCO<inf>3</inf>. This is attributed to the smallness of the hyperfine constant of the 13C nucleus in the ḢCO<inf>3</inf> radical.; 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 CO<inf>2</inf>- and HCO<inf>3</inf> radicals. These species were found to be double in the unit cells of the single crystals. The principal values of the g tensors, the 13C hyperfine tensors in CO<inf>2</inf>- and the hydrogen hyperfine tensors in HCO<inf>3</inf> were found for each site. The radicals, were found to be quite stable at room temperature and the hyperfine tensors of the 13C nucleus were well found for the crystals of natural abundancies of the constituent nuclei in CO<inf>2</inf>- radical, but not in HCO<inf>3</inf>. This is attributed to the smallness of the hyperfine constant of the 13C nucleus in the HCO<inf>3</inf> radical.