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  • 1 Nagpur University Department of Chemistry 440010 Nagpur (India)
  • 2 Nagpur University Department of Physics 440010 Nagpur (India)
  • 3 Bhabha Atomic Research Centre Radiochemistry Division Trombay 400 085 Bombay (India)
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Abstract  

Gamma-radiolysis of KNO3 in the matrix of some sulfates, viz. Na2SO4, K2SO4, KNaSO4, KNaSO4: Eu, KNaSO4: Ce, K3Na(SO4)2, K3Na(SO4)2: Eu and K3Na(SO4)2: Ce has been studied at an absorbed dose of 30 kGy.G(NO 2 ) values calculated on the basis of electron fraction in all the sulfates are enhanced significantly. It is also affected by the nature of outer cation and the dopant lanthanide. Electron spin resonance (ESR) and thermoluminescence (TL) measurements show the formation of radical species SO 4 , SO 3 , O 3 , O 2 upon -irradiation. It is proposed that there radical species may transfer energy and interact with the radical species of nitrate (NO 3 2– , NO2, NO3 etc.) so as to enhance the decomposition. A possible mechanism has been proposed.