The activity concentrations of soil samples collected from thirty different locations of Malwa region of Punjab were determined by using HPGe detector based on high-resolution gamma spectrometry system. The range of activity concentrations of 226Ra, 232Th and 40K in the soil from the studied areas varies from 18.37 Bq kg(-1) (Sangrur) to 53.11 Bq kg(-1) (Sitoguno), 57.28 Bq kg(-1) (Dhanola) to 148.28 Bq kg(-1) (Sitoguno) and 211.13 Bq kg(-1) (Sunam) to 413.27 Bq kg(-1) (Virk Khera) with overall mean values of 35 Bq kg(-1), 80 Bq kg(-1)and 317 Bq kg(-1) respectively. The absorbed dose rate calculated from activity concentration of 226Ra, (232)Th and (40)K ranges between 8.47 and 24.48, 35.68 and 92.38, and 8.74 and 17.11 nGy h(-1), respectively. The total absorbed dose in the study area ranges from 58.08 nGy h(-1) to 130.85 nGy h(-1) with an average value of 79.11 nGy h(-1). The calculated values of external hazard index (H(ex)) for the soil samples of the study area range from 0.35 to 0.79. Since these values are lower than unity, therefore, according to the Radiation Protection 112 (European Commission. Radiation Protection 112, 1999) report, soil from these regions is safe and can be used as a construction material without posing any significant radiological threat to population.
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Article Synopsis
- - Soil samples from agricultural areas near Addis Ababa were tested for radioactivity levels, specifically measuring the concentrations of 226Ra, 232Th, and 40K using gamma spectrometry with a high-purity germanium detector.
- - The average concentrations found were 32.8 ± 2.1 Bq kg-1 for 226Ra, 62.4 ± 4.4 Bq kg-1 for 232Th, and 544.3 ± 23.3 Bq kg-1 for 40K, with 232Th and 40K being higher than global averages, while 226Ra was comparable.
- - Various radiological hazard indices were calculated and
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