External dose assessment from the measured radioactivity in soil samples collected from the Islamabad capital territory, Pakistan

Journal of Radiological Protection : Official Journal of the Society for Radiological Protection
S U Rahman Matiullah

Abstract

It is a well known fact that natural radionuclides are the major contributors towards the gamma ray exposure received by the general public. In this context, soil samples were collected from the Islamabad capital territory and activities due to (226)Ra, (232)Th, (40)K and (137)Cs were measured using gamma ray spectrometry: activities ranged from 41.5-106.2 Bq kg(-1), 4.0-193.8 Bq kg(-1), 325.3-657.4 Bq kg(-1) and 1.6-9.45 Bq kg(-1), respectively. From the measured activities, the external hazard index, internal hazard index, absorbed dose rate and mean annual effective dose were calculated. External and internal hazard indices were calculated as 0.76 and 0.95, respectively. The mean absorbed dose rate was found to be 130.97 nGy h(-1). The mean effective dose was estimated as 0.16 mSv y(-1), which is less than the maximum permissible dose of 1 mSv y(-1).

References

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Nov 26, 2008·Journal of Radiological Protection : Official Journal of the Society for Radiological Protection·Said Rahman Matiullah

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Citations

Apr 19, 2011·Radiation Protection Dosimetry·N M AntovicI Antovic
Jan 23, 2018·Infectious Diseases of Poverty·Aisha KhanGuan Yayi

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