GAMMA-RAY SPECTROMETRY OF NATURALLY OCCURRING RADIOACTIVE MATERIALS (NORM) FROM BIRNIN GWARI ARTISANAL GOLDMINE OF KADUNA STATE, NIGERIA

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dc.contributor.authorMUHAMMAD ATTAHIRU, ABDULLAHI
dc.date.accessioned2014-02-14T11:06:59Z
dc.date.available2014-02-14T11:06:59Z
dc.date.issued2013-05
dc.descriptionA thesis submitted to the School of Post Graduate Studies, Ahmadu Bello University, Zaria. In Partial fulfillment of the requirement for Award of Masters Degree in Physics, Department of Physics, Faculty of Science Ahmadu Bello University, Zaria Nigeria May, 2013.en_US
dc.description.abstractMining has been identified as one of the potential sources of exposure to naturally occurring radioactive materials (NORM). Whilst the developed countries have identified NORM as potential problems and measures are being taken to address the issue very little is being done in the developing countries. However artisanal miners and mining companies are not being regulated for NORM in Nigeria. Birnin Gwari is one of the largest goldmines in Nigeria and has been in operating for the past 80 years with no data on radioactivity levels. This study was carried out to determine the activity concentrations of 238U, 232Th and 40K from the gold ores mine at Birnin Gwari gold mine using instrumental neutron activation analysis (INAA) technique. The mean activity concentrations for 238U, 232Th and 40K in soil/rock samples were found to be 37.36 ± 5.45, 62.69 ± 6.33 and 997.57 ± 199.77Bq/kg respectively. The results from this study are slightly higher when compared with typical world average of 33, 45 and 420 Bq/kg for 238U, 232Th and 40K respectively. The mean absorbed dose rate due to these radionuclide is 96.52 ± 9.62nGy/h which is also higher than 60nGy/h world average. The mean annual effective dose rate to the public in the area was estimated to be 0.118 ± 0.012mSv. The mean annual effective dose rate obtained in this work is lower than 1mSv/year dose limit recommended by ICRP for public radiation exposure control.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/1553
dc.language.isoenen_US
dc.subjectGAMMA-RAY,en_US
dc.subjectSPECTROMETRY,en_US
dc.subjectNATURALLY,en_US
dc.subjectOCCURRING,en_US
dc.subjectRADIOACTIVE,en_US
dc.subjectMATERIALS ,en_US
dc.subjectBIRNIN GWARI,en_US
dc.subjectARTISANAL,en_US
dc.subjectGOLDMINE,en_US
dc.subjectKADUNA STATE,en_US
dc.subjectNIGERIAen_US
dc.titleGAMMA-RAY SPECTROMETRY OF NATURALLY OCCURRING RADIOACTIVE MATERIALS (NORM) FROM BIRNIN GWARI ARTISANAL GOLDMINE OF KADUNA STATE, NIGERIAen_US
dc.typeThesisen_US
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