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Paramagnetic centers by X-ray-irradiation of aluminium hydroxide

Epr spectroscopy, radiation chemical yield and kinetics of thermal decay of paramagnetic centers

Abstract

EPR spectra of paramagnetic centers originating from X-ray-irradiation of aluminium hydroxide at room temperature have been measured. The EPR spectrum represents a superposition of EPR spectra of ionic centers O, holes of type

and trapped electrons. Radiation chemical yield of paramagnetic centers observed at room temperature (293 K) is G(∈spins.)=4.4±0.6) spins per 100 eV absorbed energy. The decay of paramagnetic centers in irradiated Al(OH)3 was oberved at 293 K. The rate constant of the paramagnetic centers decay in irradiated Al(OH)3 is K2=(0.0980±0.0019) kg·mol−1·min−1 and their half-life is 9.43±0.18 days.

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Dedicated to the memory of the late Genrikh Markovis Kolyiari.

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Kuruc, J. Paramagnetic centers by X-ray-irradiation of aluminium hydroxide. Journal of Radioanalytical and Nuclear Chemistry Letters 154, 61–72 (1991). https://doi.org/10.1007/BF02163064

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Keywords

  • Radiation
  • Aluminium
  • Physical Chemistry
  • Hydroxide
  • Inorganic Chemistry