Effects of Seasonal Change on the Levels of Geogenic Radionuclides in Sand and Rocks from Tyaa River deposit in Kitui County

Physics

  • S. M. Matsitsi Department of Physical Sciences, South Eastern Kenya University, P.O BOX 170-90200 Kitui, Kenya
  • J. M. Linturi Department of Physical Sciences, South Eastern Kenya University, P.O BOX 170-90200 Kitui, Kenya
  • J.M. Kebwaro School of Pure and Applied sciences, Karatina University, P.O BOX 1957-10101 Karatina, Kenya
  • O. M. Maweu Department of Physical Sciences, South Eastern Kenya University, P.O BOX 170-90200 Kitui, Kenya
Keywords: Construction sand, Natural Radioactivity, Gamma Spectrometer, Dry Season, Tyaa River

Abstract

The average activity concentration of 226Ra, 232Th and 40K in rock samples during the rainy season was 22±1.1 BqKg-1, 46±2.3 BqKg-1, and 659±33 BqKg-1 respectively, while in the sand was 27±1.4 BqKg-1, 49±2.5 BqKg-1and 824±41 BqKg-1 for 226Ra, 232Th and 40K respectively.  A repeat study during dry season reported higher activities for 226Ra, 232Th, and 40K for most samples. The corresponding dose rates and radiological indices estimated from specific activities of 226Ra, 232Th and 40K showed an upward trend as seasons changed from rainy to dry. Both seasons reported radiation doses below the permissible limits.

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Published
2019-03-06
How to Cite
Matsitsi, S. M., Linturi, J. M., Kebwaro, J., & Maweu, O. M. (2019). Effects of Seasonal Change on the Levels of Geogenic Radionuclides in Sand and Rocks from Tyaa River deposit in Kitui County. International Journal of Fundamental Physical Sciences (IJFPS), 9(1), 13-16. Retrieved from https://www.fundamentaljournals.org/index.php/ijfps/article/view/200