### 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, D_{p} = 0.35D_{L} + 0.82 D_{s} - 0.02, that integrates dose rates contributed by different lithological structures (D_{L}) and soil types (D_{s}). 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 language | English |
---|---|

Pages (from-to) | 599-605 |

Number of pages | 7 |

Journal | Sains Malaysiana |

Volume | 39 |

Issue number | 4 |

Publication status | Published - Aug 2010 |

### Fingerprint

### Keywords

- GIS
- Isodose map
- Malaysia
- NORM

### ASJC Scopus subject areas

- General

### Cite this

*Sains Malaysiana*,

*39*(4), 599-605.

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

Research output: Contribution to journal › Article

*Sains Malaysiana*, vol. 39, no. 4, pp. 599-605.

}

TY - JOUR

T1 - Statistical prediction of environmental gamma radiation doses, in Perak, Malaysia

AU - Rahmat, Zalina

AU - Bahari, Ismail

AU - Yasir, Muhamad Samudi

AU - Yahaya, Redzuwan

AU - Ab. Majid, Amran

PY - 2010/8

Y1 - 2010/8

N2 - 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.

AB - 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.

KW - GIS

KW - Isodose map

KW - Malaysia

KW - NORM

UR - http://www.scopus.com/inward/record.url?scp=77956269904&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77956269904&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:77956269904

VL - 39

SP - 599

EP - 605

JO - Sains Malaysiana

JF - Sains Malaysiana

SN - 0126-6039

IS - 4

ER -