Powell Brian A, Hughes Lara D, Soreefan Aurelie M, Falta Deborah, Wall Michael, DeVol Timothy A
Clemson University, Department of Environmental Engineering and Science, 342 Computer Court, Clemson, SC 29634-0919, USA.
J Environ Radioact. 2007;94(3):121-8. doi: 10.1016/j.jenvrad.2006.12.013. Epub 2007 Mar 9.
A gamma-ray survey and analysis of 16 riverbed samples from the Reedy River watershed near Simpsonville, SC were conducted and compared with national and international studies of primordial radionuclides. The study reported here follows on a recent discovery of anomalously high uranium concentrations in several private well waters in the area. An HPGe spectrometer was used for quantification of gamma emitting radionuclides in the sediments. All sediments contained radionuclides from the uranium and thorium series as well as (40)K. Uranium-238 concentrations in sediment samples ranged from 11.1 to 74.2Bqkg(-1). The measured radionuclide concentrations were compared with data from UNSCEAR and NURE reports. The river and stream sediment data were augmented by in situ NaI(Tl) gamma-ray spectrometer measurements. Comparisons between the ex situ and in situ measurements indicate equivalently distributed uranium in the surface soils and stream sediments, the source of which is likely attributed to the monazite belts that are known to exist in the area.
对南卡罗来纳州辛普森维尔附近里迪河流域的16个河床样本进行了伽马射线测量与分析，并与国内和国际上有关原生放射性核素的研究进行了比较。此处报告的这项研究是基于该地区近期在几口私人井水中发现异常高浓度铀之后开展的。使用了一台高纯锗光谱仪对沉积物中发射伽马射线的放射性核素进行定量分析。所有沉积物都含有铀系和钍系放射性核素以及钾-40。沉积物样本中铀-238的浓度范围为11.1至74.2贝可勒尔每千克。将测得的放射性核素浓度与联合国原子辐射效应科学委员会（UNSCEAR）和美国核管理委员会（NURE）报告中的数据进行了比较。通过现场碘化钠（铊）伽马射线光谱仪测量对河流和溪流沉积物数据进行了补充。异地测量与现场测量之间的比较表明，地表土壤和溪流沉积物中的铀分布均匀，其来源可能归因于该地区已知存在的独居石带。
