Study of natural radioactivity (226Ra, 232Th, and 40K) in soil samples for the assessment of average effective dose and radiation hazard parameters

The radioactivity concentration and the natural gamma absorbed dose rates of the terrestrial radionuclides (226 Ra, 232 Th, and 40 K) have been measured in soil samples collected from Thoubal and Bishnupur districts, Manipur, India, using high purity germanium detector. The range of activity concent...

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Bibliographic Details
Published in:Radiation Protection and Environment 2017-07, Vol.40 (3 & 4), p.154-158
Main Authors: Singh, S, Sharma, B, Devi, Th
Format: Article
Language:English
Subjects:
232Th
and 40K
Dosimetry
Efficiency
Germanium
High purity germanium gamma spectrometry
Laboratories
Natural radioactivity
natural radioactivity (226Ra
Potassium 40
Radiation dosage
radiation hazard index
Radiation hazards
Radioactivity
Radioisotopes
Radium
Radium 226
Radium isotopes
Radium radioisotopes
Sand & gravel
Sensors
Soils
Thorium isotopes
Uranium
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Summary:The radioactivity concentration and the natural gamma absorbed dose rates of the terrestrial radionuclides (226 Ra, 232 Th, and 40 K) have been measured in soil samples collected from Thoubal and Bishnupur districts, Manipur, India, using high purity germanium detector. The range of activity concentration of 226 Ra, 232 Th, and 40 K in the soil from the studied areas varies from 28.7 Bq/kg (Thoubal College) to 126.0 Bq/kg (Kakching Khunou College), 27.2 Bq/kg (Ikop Pat) to 203.5 Bq/Kg (Kakching Khunou College), and 335.6 Bq/kg (Nongpok Sekmai) to 1953.9 Bq/kg (Mantak) with overall mean values of 69.8, 76.6, and 1028.0 Bq/kg, respectively. The radium equivalent activities (Raeq ) have been evaluated in soil samples for the assessment of the radiation hazard. The corresponding absorbed dose rate, annual effective dose, and external radiation hazard index in the study area range from 54.5 to 239.3 nGyh-1 , 0.3 to 1.5 mSv, and 0.3 to 1.4 with an average value of 121.4 nGyh-1 , 0.7 mSv, and 0.7, respectively.
ISSN:0972-0464
2250-0995
DOI:10.4103/rpe.RPE_29_17