Isodose mapping of terrestrial gamma radiation dose rate of Selangor state, Kuala Lumpur and Putrajaya, Malaysia

Sanusi MS 1 , Ramli AT 2 , Gabdo HT 3 , Garba NN 3 , Heryanshah A 4 , Wagiran H 2 Show all authors , Said MN 5

Affiliations 

  • 1 Department of Physics, Faculty of Science, University Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia. Electronic address: [email protected]
  • 2 Department of Physics, Faculty of Science, University Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia
  • 3 Department of Physics, Faculty of Science, University Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia; Department of Physics, Federal College of Education Yola, Nigeria
  • 4 Institute of Environmental & Water Resource Management, Faculty of Civil Engineering, University Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia
  • 5 Department of Geoinformation, Faculty of Geoinformation and Real Estate, University Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia
J Environ Radioact, 2014 Sep;135:67-74.
PMID: 24787672 DOI: 10.1016/j.jenvrad.2014.04.004

Abstract

A terrestrial gamma radiation survey for the state of Selangor, Kuala Lumpur and Putrajaya was conducted to obtain baseline data for environmental radiological health practices. Based on soil type, geological background and information from airborne survey maps, 95 survey points statistically representing the study area were determined. The measured doses varied according to geological background and soil types. They ranged from 17 nGy h(-1) to 500 nGy h(-1). The mean terrestrial gamma dose rate in air above the ground was 182 ± 81 nGy h(-1). This is two times higher than the average dose rate of terrestrial gamma radiation in Malaysia which is 92 nGy h(-1) (UNSCEAR 2000). An isodose map was produced to represent exposure rate from natural sources of terrestrial gamma radiation.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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