Abstract
Lattice parameter change of Li 2O irradiated with thermal neutron reactors and RTNS-II (14 MeV neutron) was measured. 0.15 % lattice expansion and a curious change of lattice parameter were observed in Li 2O sintered pellets irradiated to 2 × 10 23 thermal neutrons/m 2 and Li 2O single crystals irradiated up to 2.3 × 10 21n/m 2 by 14 MeV neutrons, respectively. In Li 2O single crystals and sintered pellets irradiated by thermal neutrons and high energetic oxygen ions, F +-centers were found to be induced as predominant paramagnetic irradiation defects. The inducing rate of the F +-centers by oxygen ion irradiation was very higher than that by the thermal neutron reactors.
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