土耳其花岗岩的天然放射性及有效剂量当量评估。
Natural radioactivity and evaluation of effective dose equivalent of granites in Turkey.
作者信息
Osmanlioglu Ahmet Erdal
机构信息
Turkish Atomic Energy Authority, Cekmece Nuclear Research and Training Center, P. K. 1 Ataturk Airport, 34149 Istanbul, Turkey.
出版信息
Radiat Prot Dosimetry. 2006;121(3):325-9. doi: 10.1093/rpd/ncl028. Epub 2006 Mar 24.
Annual effective dose equivalent due to natural gamma radiation from (238)U, (232)Th and (40)K have been evaluated from granites in Turkey. Forty samples were taken for spectrometric analysis. Specific concentrations of (238)U, (232)Th and (40)K in granite samples were determined. Spectroscopy system was used with 1.8 keV (FWHM) coaxial high purity germanium (HPGe) detector. Average values of concentrations of (238)U, (232)Th and (40)K were detected at 15.85, 33.76 and 359 Bq kg(-1), respectively. The average value of radon varies from 0.073 to 0.185 Bq m(-2) h(-1) exhalation depends on the specific concentration of uranium. The dose rate due to this highest activity which have been evaluated by a Monte Carlo transport calculations does not exceed 0.4 mSv a(-1).
已根据土耳其花岗岩对源自（238）U、（232）Th和（40）K的天然伽马辐射所致年有效剂量当量进行了评估。采集了40个样本用于能谱分析。测定了花岗岩样本中（238）U、（232）Th和（40）K的比活度。能谱系统使用了1.8 keV（半高宽）同轴高纯锗（HPGe）探测器。检测到（238）U、（232）Th和（40）K浓度的平均值分别为15.85、33.76和359 Bq kg⁻¹。氡的平均值在0.073至0.185 Bq m⁻² h⁻¹之间变化，析出量取决于铀的比活度。通过蒙特卡罗输运计算评估得出的由这种最高活度所致的剂量率不超过0.4 mSv a⁻¹。
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