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Akyıl, S.; Aslani, Mahmoud A. A.; Gurboga, G.; Aytaş, Şule; Eral, M.

doi:10.1023/a:1020868809598

Cited by 11 publications

(5 citation statements)

References 6 publications

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“…At least one measurement of the dose rate was taken in each mukim. The latitude and longitude for each location were determined by using a Global Positioning System receiver, Garmin, GPS 75 (Goddard 2002, Akyil et al 2002.…”

Section: Measurement Of Terrestrial Gamma Radiation Dose Ratementioning

confidence: 99%

Terrestrial gamma radiation dose study to determine the baseline for environmental radiological health practices in Melaka state, Malaysia

2005

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Environmental terrestrial gamma radiation dose rates were measured throughout Melaka, Malaysia, over a period of two years, with the objective of establishing baseline data on the background radiation level. Results obtained are shown in tabular, graphic and cartographic form. The values of terrestrial gamma radiation dose rate vary significantly over different soil types and for different underlying geological characteristics present in the study area. The values ranged from 54 +/- 5 to 378 +/- 38 nGy h(-1). The highest terrestrial gamma dose rates were measured over soil types of granitic origin and in areas with underlying geological characteristics of an acid intrusive (undifferentiated) type. An isodose map of terrestrial gamma dose rate in Melaka was drawn by using the GIS application 'Arc View'. This was based on data collected using a NaI(Tl) scintillation detector survey meter. The measurements were taken at 542 locations. Three small 'hot spots' were found where the dose rates were more than 350 nGy h(-1). The mean dose rates in the main population areas in the mukims (parishes) of Bukit Katil, Sungai Udang, Batu Berendam, Bukit Baru and Bandar Melaka were 154 +/- 15, 161 +/- 16, 160 +/- 16, 175 +/- 18 and 176 +/- 18 nGy h(-1), respectively. The population-weighted mean dose rate throughout Melaka state is 172 +/- 17 nGy h(-1). This is lower than the geographical mean dose rate of 183 +/- 54 nGy h(-1). The lower value arises from the fact that most of the population lives in the central area of the state where the lithology is dominated by sedimentary rocks consisting of shale, mudstone, phyllite, slate, hornfels, sandstone and schist of Devonian origin which have lower associated dose rates. The mean annual effective dose to the population from outdoor terrestrial gamma radiation was estimated to be 0.21 mSv. This value is higher than the world average of 0.07 mSv.

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Section: Measurement Of Terrestrial Gamma Radiation Dose Ratementioning

confidence: 99%

Terrestrial gamma radiation dose study to determine the baseline for environmental radiological health practices in Melaka state, Malaysia

2005

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“…226 Ra and 224 Ra originate naturally, but their intensities tend to increase with depth below the earth's surface [6]. Figure 2 represents the combined nuclear-energy level diagram of 224 Ra and 226 Ra and shows their appropriate decay by alpha emission to radon.…”

Section: Presence Of 226 Ra and 224 Ramentioning

confidence: 99%

“…There is little information in the literature on the acceptable levels of 226 Ra and 224 Ra in oily sludge. However, the documented level [6] of such radioactivity in soil and regular sludge is around 200 Bq/kg. As can be seen from our results the levels in oily sludge were up to five times higher, and such activities could affect the environment when the sludge is used as a component in construction material or on sludge farms.…”

Section: Activity (Bq)mentioning

confidence: 99%

“…Radium levels in soil and regular sludge can vary from location to location [6][7][8], but the average concentration is about 200 Bq/kg. A preliminary study showed that Ra levels in the oily sludge were relatively high, and our interest in this regard prompted the present study.…”

Section: Introductionmentioning

confidence: 99%

“…A preliminary study showed that Ra levels in the oily sludge were relatively high, and our interest in this regard prompted the present study. 226 [4][5][6][9][10][11][12][13][14][15] that the accumulation of radium in the environment is a significant hazard. Exposure to elevated alpha-and gamma radiation creates serious biological problems [2][3][4][5], especially genetic damage, which usually arises from exposure to low doses over an extended period [4,5].…”

Section: Introductionmentioning

confidence: 99%

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