Determination of 222Rn and 238U Concentrations in Some Selected Samples of Rock for Sulaimani Area (Kurdistan Region-Iraq)

Kamal O. Abdullah

University of Sulaimani, Faculty of Science and Science Education, Physics Department

Different rock samples collected from the Mountains located to the west and north of
Sulaimani district. Solid state nuclear track detector technique, CR-39 passive
detectors included, is used for analyzing concentrations Radon. The uranium
concentrations determined from the secular equilibrium between uranium and radon
activity. The concentrations of Radon and Uranium have been calculated. The
maximum and the minimum concentrations determined (4774.524±17.665 and
224401.714) Bq/m3

for Radon and (0.313±0.143 ppm, 14.728±6.731 ppm) for
uranium, respectively. The higher concentration values of both Byara (Mountain of
Balkha) and Penjween is due to sample rocks formation compared to the values
appeared from Ranya and Chaqchaq regions. The highest annual effective dose was
0.8μSv/hr, which is higher than the value 1mSv ~ 0.114 μSv/hr recommended by the
International Commission on Radiological Protection ICRP..

Key Words: Rock, Radon, Uranium, SSNTD, CR-39


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