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Author Mehra, Rohit ♦ Singh, Surinder ♦ Singh, Kulwant
Source IACS Kolkata
Content type Text
Publisher Indian Association for the Cultivation of Science
File Format PDF
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics
Subject Keyword Gamma ray spectrometry ♦ HPGe detector, Raeq activities ♦ Annual Effective Dose ♦ External Hazard Index
Abstract The activity concentrations of the natural radionuclides namely 238Ra, 232Th and 40K are measuredfor soil samples collected from different locations of Faridkot and Mansa districts of Punjab. HPGe detector,based on high-resolution gamma spectrometry system is used for the measurement of activity concentration.The range of activity concentrations of 226Ra, 232Th and 40K in the soil from the studied areas varies from 21.42Bq kg–1 to 40.23 Bq kg–1 , 61.01 Bq kg–1 to 142.34 Bq kg–1 and 227.11 Bq kg–1 to 357.13 Bq kg–1 with overall meanvalues of 27.17 Bq kg–1, 95.22 Bq kg–1 and 312.76 Bq kg–1, respectively. Radium equivalent activities arecalculated for the analyzed samples to assess the radiation hazards arising due to the use of these soil samplesin the construction of dwellings. The absorbed dose rate calculated from activity concentration of 226Ra, 232Thand 40K ranges between 9.87 and 18.55, 38.01 and 88.68 and 9.40 and 14.79 nGy h–1, respectively. The totalabsorbed dose in the study area ranges from 61.10 nGy h–1 to 112.86 nGy h–1 with an average value of 84.80nGy h–1. The calculated values of external hazard index (Hex) for the soil samples of the study area range from0.36 to 0.68. Since these values are lower than unity, according to the Radiation Protection 112 (EuropeanCommission, 1999) report, soil from these regions is safe and can be used as construction material withoutposing any significant radiological threat to population. The corresponding average annual effective dose forindoor and outdoor measured in the study area are 0.42 mSv and 0.10 mSv respectively.
Education Level UG and PG
Learning Resource Type Article
Journal Indian J Phys
Volume Number 83
Issue Number 7
Page Count 7
Starting Page 1031
Ending Page 1037