Thermally Stimulated Conductivity of Irradiated KBr

The thermally stimulated conductivity of KBr crystals irradiated at 10 °K with monoenergetic neutrons and γ‐rays was studied over the temperature range 10 to 300 °K. The peak spectrum below 70 °K was associated with the annihilation of lattice defects created by the irradiation, while the higher temperature peaks were interpreted as due to the depopulation of impurity traps. The annealing kinetics of the low‐temperature peak were consistent with defect annihilation processes controlled by the migration of the Br − interstitials. Neutron bombardment enhanced significantly the low‐temperature peaks above the level established by background γ‐rays.