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ARTICLE
Year : 2011  |  Volume : 34  |  Issue : 4  |  Page : 275-281

Natural radioactivity in the volcanic field north of Sana'a, Yemen


1 Department of Physics, Faculty of Education Toor El-Baha, Aden University, Yemen
2 Department of Physics, Faculty of Science, Assiut University, Egypt
3 Department of Physics, Faculty of Science, South Valley University, Egypt

Correspondence Address:
A I El-Mageed
Department of Physics, Faculty of Science, Assiut University
Egypt
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0972-0464.106205

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The level of natural radioactivity in rocks and soil of 32 samples collected from locations at North Sana'a in Yemen was measured. Concentrations of radionuclides in rocks and soils samples were determined by gamma-ray spectrometer using HPGe detector with specially designed shield. The average radioactivity concentrations of 226 Ra, 232 Th and 40 K were determined and expressed in Bq kg−1 . The results showed that these radionuclides were present in concentrations of 21.79 ± 3.1, 19.5 ± 2.6 and 399.3 ± 16 Bq kg−1 , respectively, for rocks. For soil, the corresponding values were 48.2 ± 4.4, 41.7 ± 4.5 and 939.1 ± 36 Bq kg−1 . Also, the radiological hazard of the natural radionuclides content, radium equivalent activity, total dose rates, external hazard index and gamma activity concentration index of the (rocks/soils) samples in the area under consideration were calculated. The data were discussed and compared with those given in the literature.


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