International Journal of Recent Research and Review
Abstract
The natural radioactivity of soil at Nineveh
Province has been studied in this paper. The
radioactivities of 19 soil samples have been measured
with NaI(Tl) detector. The radioactivity concentrations
of, 226Ra , 232Th ,214Pb and 40K ranged from, 17.02 to
40.98 Bq/kg, 11.22 to 32.65 Bq/kg,8.46 to 16.00 Bq/kg and
from 206.51 to 509.56 Bq/kg respectively. In order to
evaluate the radiological hazard of the natural
radioactivity, the radium equivalent activity ,the
absorbed dose rate, the annual effective dose rate,
internal and external hazard indices , gamma index,
alpha index, excess life time cancer risk and finally
annual gonadal dose equivalent have been calculated. The
study provides background radioactivity concentrations
in Nineveh Province. Specific activity concentrations in
ten soil samples of selected regions in Nineveh province
were analyzed for the natural radioactivity of 226Ra,
232Th,214Pb and 40K using γ-spectroscopy based on highpurity
germanium detector with an efficiency of 40%.
The activity concentrations of natural radionuclides
226Ra,232Th ,214Pb and 40K were found to range from
16.21 Bq/kg in (Al-Medan district) (S9) to 38.83 Bq/kg in(
Sinjar district) (S1)with an average value of value of
32.52±6.48 Bq/kg , 8.53 Bq/kg in (Al-Medan district) (S9)
to 28.37Bq/kg in (Rabeaa district)(S2) with an average
value of 20.30±5.36 Bq/kg, 8.13 Bq/kg in (Al-Medan
district) (S9) to 18.22 Bq/kg in ( Sinjar district) (S1) with
an average value of 14.78± 2.97and 236.03 Bq/kg in
(Telkaif district) (S5) to 613.11 Bq/kg in (Rabeaa district)
(S2) with an average value of 378.93± 123.29 Bq/kg. The
radium equivalent activity, absorbed gamma dose rate,
annual effective dose equivalent , gamma index , alpha
index ,internal and external hazard indices, excess life
time cancer risk and annual gonadal dose equivalent
associated with the natural radionuclides were calculated.
Publication Date
5/6/2015
Publisher
International Journal of Recent Research and Review
ليث أحمد نجم | Laith Ahmed Najam | 12102