Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/11145
Title: Radiological significance of Egyptian limestone and alabaster used for construction of dwellings
Authors: El-Taher, A
Makhluf, S
Keywords: Natural radioactivity
Limestone
Alabaster
Radiation hazards
Issue Date: Mar-2011
Publisher: NISCAIR-CSIR, India
Abstract: <sup>&nbsp;</sup>The natural radionuclides in limestone and alabaster found in Assuit Governorate in Upper Egypt have been investigated by passive gamma-ray spectrometry. From the measured <img src='/image/spc_char/gamma.gif' border=0>-ray spectra, specific activities were determined. The measured activity concentrations for these natural radionuclides were compared with the reported data from other countries. The radiation hazard parameters related to the exposure of limestone and alabaster have also been calculated. The obtained results of radium equivalent <i>R</i>aeq, level index <i>I</i><img src='/image/spc_char/gamma.gif' border=0>r, the external hazard index <i>H</i><sub>ex</sub> and absorbed dose rate in limestone (90.44, 0.63, 0.17, 39.94) and (70.86, 0.50, 0.13, 31.55) are lower than the acceptable level 370 Bqkg<sup>-1</sup> for radium equivalent Ra<sub>eq</sub>, 1 for level index <i>I</i><img src='/image/spc_char/gamma.gif' border=0>r, the external hazard index <i>H</i><sub>ex</sub> ≤ 1 and 59 (nGy.h<sup>−1</sup>) for absorbed dose rate. So limestone and alabaster can be used as building construction without exceeding the proposed radioactivity criterion level.
Description: 157-161
URI: http://hdl.handle.net/123456789/11145
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.49(03) [March 2011]

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