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Direct and Indirect Effects of Uranium on Microstructure of Sedimentary Phosphate: Fission Tracks and Radon Diffusion

  • Fatima Zahra Boujrhal
  • Rajaâ Cherkaoui El Moursli
Part of the Springer Geology book series (SPRINGERGEOL)

Abstract

Moroccan sedimentary phosphates are essentially constituted by apatite and contain some tens ppm of uranium. This uranium undergoes spontaneous fission and radioactive decay in chain, since its geological formation. The spontaneous fission causes the radiation damage in the structure, by recoil of the fission products, whereas the radioactive decay products various radioactive daughters, where one of them is gas; Radon. This radioactive gas causes microstructure defects (nanopores) by diffusion. The present abstract focuses on the exam of the micro/nanostructure due to these two phenomena. The fission tracks of several grains of phosphate are studied by microscopy observations, whereas the radon emanation is analyzed by gamma spectrometry analysis of bulk of phosphate. Some interesting and correlated results are obtained.

Keywords

Fission Track Spontaneous Fission Radon Activity Radon Emanation Apatite Fission Track Analysis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Fatima Zahra Boujrhal
    • 1
  • Rajaâ Cherkaoui El Moursli
    • 2
  1. 1.Faculté des Sciences et Techniques, Laboratoire de Gestion et de Valorisation des ressources naturelle (LGVEN)Université Sultan Moulay SlimaneBéni MellalMorocco
  2. 2.Faculté des Sciences, Laboratoire de Physique Nucléaire (LPNR)Université Mohammed VRabatMorocco

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