Abstract
The paramagnetic relaxation characteristics of trapped electrons in γ-irradiated alkaline ices were studied by power saturation methods. The relaxation times were measured as a function of radiation dose, deuteration, phase, and temperature. Linewidths were measured under various conditions. The trapped electron EPR line is inhomogeneously broadened by nuclear hyperfine interactions; the spin-lattice relaxation mechanism is probably a cross relaxation process with O−. The change in relaxation time with radiation dose indicates that the electrons are trapped with a nonuniform spatial distribution in hydroxyl anion vacancies in radiation-produced spurs of ∼30-Å radius.
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