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Thermal and radiation annealing in131I−-doped periodate crystals

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Abstract

Isothermal annealing at temperatures between 90 and 250°C and radiation annealing at 40, −76 and −196°C were studied in sodium periodate crystals doped by rapid crystallization and by spray techniques. The results showed the occurrence of transfer annealing because the dopant was converted to the oxidized forms of iodate and periodate depending on the treatment conditions. Similarities with the annealing behaviour of recoil species in neutron irradiated periodate systems are established and the Bellido and Wiles “stepwise oxidation model” is used to explain the mechanism of the processes.

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Author notes

  1. L. M. Antunes

    Present address: Instituto de Atividades Espaciais, Divisão de Estudos Avancados, Centro Técnico Aeroespacial, 12 200 São José dos Campos, São Paulo, Brasil

  2. A. V. Bellido

    Present address: Comissão Nacional de Energia Nuclear, Instituto de Engenharia Nuclear, C.P. 2186, 20 001, Rio de Janeiro, Brasil

Authors and Affiliations

  1. Coordenacão dos Programas de Pós-Graduacão de Engenharia, Universidade Federal do Rio de Janeiro, 21941, Rio de Janeiro, Brasil)

    L. M. Antunes & A. V. Bellido

Authors
  1. L. M. Antunes
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  2. A. V. Bellido
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Antunes, L.M., Bellido, A.V. Thermal and radiation annealing in131I−-doped periodate crystals. Journal of Radioanalytical and Nuclear Chemistry, Articles 109, 169–176 (1987). https://doi.org/10.1007/BF02117533

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  • DOI: https://doi.org/10.1007/BF02117533

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