ESR investigations on irradiated polystyrene

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• 作者：Chipara ; M. ; Benson ; R. ; Chipara ; M.D. ; Reyes ; J.R.
• 关键词：76.30.Rn ; 82.35.&minus ; x ; 61.82.Pv ; 64.70.Pf ; Electron spin resonance ; Irradiation ; Free radicals ; Glass transition ; Diffusion
• 刊名：Nuclear Instruments and Methods in Physics Research Section B ; Beam Interactions with Materials and Atoms
• 出版年：2003
• 期刊代码：42_0168583x
• 类别：ph
• 出版时间：August, 2003
• 卷：208
• 期：Complete
• 页码：390-394
• 文件大小：172 K

摘要

Electron spin resonance investigations on the free radicals generated in polystyrene by gamma irradiation, in the temperature range 300–460 K, are reported. Assuming the competition between first and second order recombination processes, the isothermal decay of free radicals has been accurately fitted. It is proved that both the first and the second order isothermal reaction rates are well described by a Vogel–Fulcher–Tamman–Arrhenius equation.