Radiation dosimetry of some rice types consumed in Basrah Governorate/Iraq by using thermoluminescence technique and SAM940-2G

摘要

This research is monitoring and exploring the evaluation of dose levels and determination of the specific activity of natural and artificial radionuclides in different rice types consumed in Basrah/Iraq. This study was the first radiological study focused on the comparison of dose rates and radiation risk indices measured using thermoluminescence technique and SAM940-2G. The activity determination of selected radionuclides was carried out by using SAM940-2G running remote applications and performing quantitative analysis. The specific activity values of U-238, Th-232, K-40 and Cs-137 ranged as (0.051 +/- 0.011-0.529 +/- 0.003) Bq/kg with an average (0.239 +/- 0.161) Bq/kg, (0.006 +/- 0.003-1.225 +/- 0.002) Bq/kg with an average (0.293 +/- 0.398) Bq/kg, (31.763 +/- 0.001-437.233 +/- 0.0004) Bq/kg with an average (157.807 +/- 147.194) Bq/kg and (0.119 +/- 0.004-0.784 +/- 0.002) Bq/kg with an average (0.444 +/- 0.235) Bq/kg, respectively. Several hazard indices have been calculated for all rice samples involved in this study. All results have agreed with those described in previously published studies, and all these obtained results have been identified the radiation to be below the worldwide limit values. Thus, consumed rice brands in Basrah governorate are radiologically safe, in particular R2 sample which is classified as the brand safest from radiation risk.