Olowofila, I.O. (2017) ASSESSMENT OF GAMMA RADIATION DUE TO TERRESTRIAL SOURCES IN SOUTH WESTERN NIGERIA. In: National Conference of the School of Pure & Applied sciences and Communication & Information Technology, 4th and 7th December, 2017., The Federal Polytechnic, Ilaro.
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Assessment of Gamma Radiation due to Terrestrial sources in south western Nigeria.pdf Download (542kB) |
Abstract
The activity concentration of naturally occurring radionuclides in twenty one (21) soil samples from selected areas in south western Nigeria has been determined using the NaI(Tl) detector. The average activity concentrations of 226Ra, 232Th and 40K in Ibadan areas were 19.57 ± 6.84, 51.44 ± 20.94 and 97.06 ± 32.90 Bqkg-1 respectively, ranging from 10.1 to 31.7, 17.9 to 81.0 and 55.1 to 133.7 Bqkg-1 respectively while the average activity concentrations in Lagos study areas were 17.8 ± 10.16, 32.21 ± 13.16 and 166.73 ± 33.03 Bqkg-1 respectively, ranging from 5.3 to 33.5, 17.7 to 53.2 and 121.7 to 211.4 Bqkg-1 respectively and the average activity concentrations of radionuclides in Ohunbe study areas were 29.17 ± 9.31, 13.03 ± 7.68 and 55.96 ± 11.76 Bqkg-1 for 226Ra, 232Th and 40K respectively, ranging from 19.2 to 44.5, 3.4 to 19.4 and 40.6 to 71.3 Bqkg-1 respectively. The absorbed dose and effective doses were also calculated. The effective dose in all sites were lower than the permissible limit of 1 mSv/yr, hence the possibility of radiological hazard is low.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Subjects: | Q Science > Q Science (General) |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Chemistry |
| Depositing User: | Mr Taiwo Egbeyemi |
| Date Deposited: | 31 May 2020 18:52 |
| Last Modified: | 31 May 2020 18:52 |
| URI: | http://eprints.federalpolyilaro.edu.ng/id/eprint/305 |
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