• Mustapha Bukar Liberty
• Abbati Alhaji Musa
• Muhammad Alhaji Lawan

The activity concentrations of elemental occurring radionuclides (226Ra, 232Th and 40K) from the 10 different soil samples in Geidam, Yobe state, Nigeria were measured. The activity concentrations in these samples were determined through gamma spectroscopy with a Thallium activated Sodium Iodide NaI (TI) detector. The activity concentrations in the 10 samples measured, ranged between 49.14 ± 0.8 to 99.27 ± 3.4 Bq kg-1, 68.93 ± 1.3 to 95.11 ± 1.1Bq kg-1, 115.19 ± 0.6 to 217.50 ± 0.6 Bq kg-1 for 226Ra, 232Th, and 40K radionuclides respectively. The radium equivalent activity estimated in the soil samples were in the range of 164.00 to 248.43 Bq kg-1 and with mean value of 205.6 Bq kg-1. The mean absorbed gamma dose rate was determined to be 91.56 nGyh-1, while the annual effective dose rate was estimated, varied in the range from 89.04 to 135.96 μSv y-1 with an average value of 112.29 μSv y-1. The external hazard indexes estimated for the study area ranged from 0.4 to 0.7 with mean value of 0.6.

Activity concentration, Absorbed dose rate, External hazard index, Gamma Spectroscopy, Geidam.

"Assessment of radioactivity level in soil samples from Geidam town", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 8, page no.c118-c122, August-2021, Available :http://www.jetir.org/papers/JETIR2108266.pdf

"Assessment of radioactivity level in soil samples from Geidam town", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 8, page no. ppc118-c122, August-2021, Available at : http://www.jetir.org/papers/JETIR2108266.pdf