Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1888255 | Radiation Measurements | 2013 | 6 Pages |
•The structures of radicals in potassium dithionate were investigated by EPR.•Two types of SO3− radical ions were identified.•The 33S hyperfine tensors and g-tensors were axially symmetric about the
The structures of the free radicals formed by the irradiation of potassium dithionate (K2S2O6) with 60Co γ-rays and 14N7+ ions were investigated by EPR to further examine a recently proposed LET effect in this material. Two types of SO3− radical ions were identified in X-irradiated single crystals by measurements at X- and Q bands. One of these (S1) exhibited 33S hyperfine couplings A⊥ = 12.49, A|| = 15.60 mT, the other (S2) A⊥ = 11.29, A|| = 13.92 mT. The g-factors were nearly isotropic, g⊥ = 2.0010, g|| = 2.0003; and g⊥ = 2.0026, g|| = 2.0008, respectively. The 33S hyperfine coupling tensors and g -tensors were axially symmetric about the trigonal