期刊名称：Turkish Journal of Engineering and Environmental Sciences
印刷版ISSN：1300-0160
电子版ISSN：1303-6157
出版年度：2008
卷号：32
期号：04
页码：245-251
出版社：Scientific and Technical Research Council of Turkey
摘要：A comprehensive study was conducted to determine the radioactivity concentrations of beach sand samples from different sites along the coast of Tripoli, northwest Libya, using high resolution g -ray spectroscopy. Collection of samples was carried out during low tide, where it was possible to collect sediments from the wet region that was covered by sea water during high tide. From the measured g -ray spectra, elemental concentrations were determined for 226Ra, 232Th, 40K, and 210Pb at depths 5-10 and 50-70 cm from the surface. The activity concentration ratios of 210Pb/226Ra for some samples were calculated to show the disequilibrium between the 210Pb and its parent nuclei 226Ra in the coastal marine sediments. The mean value of the absorbed dose rates in air obtained in the studied area was 4.4 \pm 1.3 nGy h-1, which is lower than the world average (55 nGy h-1).
关键词：Natural radioactivity, Radionuclide, Beach sand, Gamma ray spectroscopy, Libya
