کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1888255 | 1533431 | 2013 | 6 صفحه PDF | دانلود رایگان |
• 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 radicals formed retain the orientation of the SO3 groups in undamaged crystals.
• The relative radical yields depend on radiation quality.
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
Journal: Radiation Measurements - Volume 59, December 2013, Pages 123–128