Hazard estimation from Radiofrequency Radiation in a Nigerian Teaching Hospital from nearby GSM Base-Stations

Increasing competition between GSM service providers and several calls for improvement of their quality of service from members of the public has led to proliferation of base station (BTS) masts in Nigeria. Consequently, there is an increase in the risk of radiation hazard due to exposure of the public to radiofrequency radiation from the BTS antennae. This study is aimed at estimating the radiation hazard due to electric field intensity from BTSs.Electric field intensity measurements due to different GSM Operators were taken at thirty sites in the 900MHz and 1800MHz frequency bands. The maximum instantaneous electricfield intensities of 301.05 ± 63.8

Dose assessment due to terrestrial gamma radiation in Ibadan, South Western Nigeria

The activities of primordial radionuclides in surface soil at Ibadan, South-Western Nigeria have been measured with a 7.6cm x 7.6cm NaI(TL) detector. The mean absorbed dose rate, annual effective dose and the collective effective dose at Ibadan were evaluated from measurement of 40K; 238U; 232Th activities and their mean values found to be 0.070 ± 0.008 mGy.h-1, 86.1 mSv.y-1 and 344.2 man Sv.y-1, respectively. Keywords: soil; dose; effective; collective; 40K; 238U; 232Th; exposure [Global Jnl Pure & Appl. Sci. Vol.9(3) 2003: 393-396

Comparison on in situ and laboratory gamma-ray spectroscopy of terrestrial gamma radiation in Ibadan, Southwestern Nigeria

In situ - ray spectroscopic method of measeruments, using the calibration factor by Zombori et al, and laboratory method for soil samples were carried out in Ibadan, SW Nigeria. The average specific activities of 40K, 238U and 232Th in the soil were 299.0 16.5 Bqkg-1, 40.0 5.8 Bqkg-1 and 95.0 7.8 Bqkg-1, respectively, by in situ measurements, while for the laboratory measurements, the specific activities were found to be 355.0 19.7 Bqkg-1 for 40K, 31.0 5.9 Bqkg-1 for 238U and 63.0 7.5 Bqkg-1 for 232Th. Statistical analysis using F- hypothesis test of microsoft excel 5.0 analysis toolpak gave F-values to be 0.32, 0.52 and 0.00, respectively, which indicated that the radionuclides were not site dependent. The comparison shows a correlation of 0.65, 0.59 and 0.63 respectively, for 40K, 238U and 232Th. Key words : gamma - ray; calibration; soil; activity; radionuclide (Global Journal of Pure and Applied Sciences: 2002 8(4): 507-512