en Radiation Biology Radiation Biology تحقيق بديع Original Research <div style="text-align: justify;">Background: The present work was conducted on some soil samples collected from Shamnagar upazila of Satkhira district of south-west part of world largest mangrove forest Sundarban Rezion, Bangladesh which were affected by natural disaster cyclone Aila. Materials and Methods: The soil samples were analyzed to determine terrestrial &gamma;-ray activity using HPGe &gamma;-ray spectrometry. The measurements conducted in the current study showed that primordial radionuclides namely the ²³⁸U and ²³²Th and ⁴⁰K are contained in all the soil samples. Results and Discussion: The obtained results of the average activity concentrations of ²³⁸U, ²³²Th and ⁴⁰K were found to be within the range of the world average of 17-60, 11-64, 140-850 Bq.kg^-1reported by UNSCEAR. The radiation dose is below the permissible limit of 1mSvy^-1 recommended by IAEA (2007). No peak of ¹³⁷Cs from the decay activity was found in the spectrum in the present work. Conclusion: The present work will be useful in providing environmental monitoring data base of those particular areas.</div> Disaster, Aila, health, natural radiation. 397 404 http://ijrr.com/browse.php?a_code=A-10-1-857&slc_lang=en&sid=1 Sk.A.K. Arafin skak_arafin@daffodilvarsity.edu.bd 7900319475328460015694 7900319475328460015694 Yes Department of Natural Sciences, Faculty of Science and Information Technology, Daffodil International University, Sukrabad, Dhaka-1207, Bangladesh A. El-Taher 7900319475328460015695 7900319475328460015695 No Department of Physics, Al-Azhar University, Faculty of Science, Assuit 71452, Egypt A.K.M. Fazlul Hoque 7900319475328460015696 7900319475328460015696 No Office of the Registrar, Daffodil International University, Sukrabad, Dhaka-1207, Bangladesh M. Ashraful Hoque 7900319475328460015697 7900319475328460015697 No Health Physics Division, Atomic Energy Centre, Dhaka, Bangladesh J. Ferdous 7900319475328460015698 7900319475328460015698 No Health Physics Division, Atomic Energy Centre, Dhaka, Bangladesh M. Joynal Abedi 7900319475328460015699 7900319475328460015699 No Accelerator Facilities Division, Atomic Energy Centre, Dhaka, Bangladesh