Ions of metals of groups (II-V)B in anomalous oxidation states (the 2S/sub 1/2/ electronic state) in sodium borate and potassium borate glasses

The authors studied sodium borate glasses (SBG's), potassium borate glasses (PBG's), and potassium sodium borate glasses (PSBG's) containing oxides of metals from groups (II-V)B. Chemically pure reagents were used for their synthesis. In order to create the metal ions in unusual oxidation states, the glasses were subjected to γ radiation from 60Co at 77 K and 300 K in doses up to 100 kGy. The ESR spectra were recorded on a Varian E-12 radiofrequency spectrometer at 77 K in the 3-CM microwave range. Glasses without the metal oxides were investigated in parallel. Following the irradiation of SBG's, PBG's, and PSBG's containing the oxides of cadmium, mercury, gallium, thallium, tin, and lead, additional ESR signals appear in the region of the g factor of a free electron g/sub e/ and at high fields