Statistical prediction of environmental gamma radiation doses, in Perak, Malaysia

Zalina Rahmat, Ismail Bahari, Muhamad Samudi Yasir, Redzuwan Yahaya, Amran Ab. Majid

Research output: Contribution to journalArticle

Abstract

The concentrations of Naturally Occurring Radioactive Material (NORM) and their corresponding terrestrial gamma radiation have been shown to be associated with certain lithology and soil types. A possible relationships among gamma radiation levels, and the lithology and soil types make it possible to predict ionizing radiation level of an area that cannot be directly measured. A study was carried out to statistically predict and validate environmental gamma radiation dose rates based on actual field measurements using a sodium iodide detector. Results obtained showed that the predicted dose rate (D J may be determined using a multiple correlation regression equation, Dp = 0.35DL + 0.82 Ds - 0.02, that integrates dose rates contributed by different lithological structures (DL) and soil types (Ds). Statistical analysis on 32 different lithology and soil type combinations showed that more than 50% of the predicted data were not significantly different from the data measured in the field. A predicted isodose map was subsequently plotted base on 4 dose rate classes ranging from 0.1 - 0.3 μSv h-1.

Original languageEnglish
Pages (from-to)599-605
Number of pages7
JournalSains Malaysiana
Volume39
Issue number4
Publication statusPublished - Aug 2010

Fingerprint

Malaysia
soils
lithology
gamma rays
dosage
predictions
sodium iodides
radioactive materials
ionizing radiation
statistical analysis
regression analysis
detectors

Keywords

  • GIS
  • Isodose map
  • Malaysia
  • NORM

ASJC Scopus subject areas

  • General

Cite this

Statistical prediction of environmental gamma radiation doses, in Perak, Malaysia. / Rahmat, Zalina; Bahari, Ismail; Yasir, Muhamad Samudi; Yahaya, Redzuwan; Ab. Majid, Amran.

In: Sains Malaysiana, Vol. 39, No. 4, 08.2010, p. 599-605.

Research output: Contribution to journalArticle

Rahmat, Zalina ; Bahari, Ismail ; Yasir, Muhamad Samudi ; Yahaya, Redzuwan ; Ab. Majid, Amran. / Statistical prediction of environmental gamma radiation doses, in Perak, Malaysia. In: Sains Malaysiana. 2010 ; Vol. 39, No. 4. pp. 599-605.
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