Abstract
Electron paramagnetic resonance spectra of 7-irradiated Li:
2
SO
4
-K
2
SO
4
mixed system are measured at X-band and 300 K. Two types of centers, A and B, identified as LiOH
+
2
and SO
−
3
are studied. The EPR spectrum of LiOH
+
2
has a well-resolved hyperfine structure. The effective g-value and the hyperfine structure constant of it are calculated. On the other hand, the SO
−
3
center is characterized by an intense isotropic signal at a g-value ≈ 2. 0035. Mechanisms of center formation are proposed. Infrared transmittance spectra were recorded for unirradiated and γ-ray irradiated samples. A decrease in the transmittance spectra was observed after irradiation. The ionic conductivity, σ, has been measured for the Li
2
SO
4
-K
2
SO
4
system before and after irradiation in the temperature range 30-400°C. The activation energy was found to be 1. 1 eV. A considerable decrease in the conductivity value accompanied by an increase in the activation energy was observed after γ-irradiation.