Distribution of terrestrial and anthropogenic radionuclides in Turkish surface soil samples

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• 作者：艦. Turhan^a ; ^{serefturhan@ymail.com} ; ^{seref.turhan@nevsehir.edu.tr} ; A. K&ouml ; se^b ; A. Varinlio臒lu^b ; N.K. 艦ahin^c ; 陌. Ar谋kan^d ; F. O臒uz^d ; B. Yü ; cel^d ; T. &Ouml ; zdemir^d
• 关键词：Soil ; Activity concentration ; Gamma dose rate ; Effective dose ; Gamma-ray spectrometer
• 刊名：Geoderma
• 出版年：2012
• 期刊代码：28_00167061
• 类别：ear
• 出版时间：October, 2012
• 卷：187-188
• 期：Complete
• 页码：117-124
• 文件大小：1373 K

摘要

A comprehensive study was executed to determine the distribution of the natural and anthropogenic radionuclides in surface soils throughout Turkey. In this study, the activity concentrations of ²³⁸U, ²³²Th, ⁴⁰K and ¹³⁷Cs in total of 1031 soil samples collected from seven geographical regions of Turkey were measured using the high-resolution gamma spectrometer with HPGe detector. The activity concentrations of ²³⁸U, ²³²Th, ⁴⁰K and ¹³⁷Cs in soil samples varied from 2.0 to 220.0 Bq kg^鈭?#xA0;1 with a mean of 28.6 卤 0.7 Bq kg^鈭?#xA0;1, 1.0 to 158.6 Bq kg^鈭?#xA0;1 with a mean of 33.0 卤 0.7 Bq kg^鈭?#xA0;1, 26.0 to 1603.2 Bq kg^鈭?#xA0;1 with a mean of 448.5 卤 7.3 Bq kg^鈭?#xA0;1 and 1.0 to 357.0 Bq kg^鈭?#xA0;1 with a mean of 13.4 卤 0.8 Bq kg^鈭?#xA0;1, respectively. Elemental concentration mean values of ²³⁸U, ²³²Th and ⁴⁰K were found as 2.3 mg kg^鈭?#xA0;1, 8.1 mg kg^鈭?#xA0;1 and 1.4%, respectively. For all surface soil samples the absorbed gamma dose rate and the corresponding effective dose rate due to the external exposure in outdoor were evaluated as 51.9 nGy h^鈭?#xA0;1 (4.7-234.3 nGy h^鈭?#xA0;1) and 0.064 mSv y^鈭?#xA0;1 (0.006-0.287 mSv y^鈭?#xA0;1), respectively.