Antovic Nevenka M, Svrkota Nikola, Antovic Ivanka, Svrkota Ranko, Jancic Dejan
Faculty of Natural Sciences and Mathematics, University of Montenegro, Podgorica, Montenegro.
Isotopes Environ Health Stud. 2013 Jun;49(2):153-62. doi: 10.1080/10256016.2013.734303. Epub 2013 Mar 1.
Activity concentrations of the naturally occurring radionuclides (226)Ra, (232)Th, (40)K and anthropogenic (137)Cs in sand samples collected from 20 renowned beaches on the Coast of Montenegro have been determined using an HPGe (high purity Ge spectrometer). The average activity concentrations were found to be 7.4, 5.2, 97.3 and 0.5 Bq kg(-1), respectively. For all sand samples, the radium equivalent activity has been evaluated and found to be lower than the limit of 370 Bq kg(-1). External and internal hazard indices were less than unity. The gonadal dose equivalent was estimated to be on average 75 μSv y(-1), which is about four times lower than the global average for soil (0.3 mSv y(-1)). Calculated values of absorbed dose rates showed the range from 3.1 to 28 nGy h(-1), which is below the world median of average values (57 nGy h(-1)). The effective dose rate in the range from 3.8 to 34.4 μSv y(-1) was significantly below the recommended limit value for the public (1 mSv y(-1)). The highest dose rate was found for the Velika Plaza locality, which also showed heavy metal contents (As, B, Cd, Hg, Cr, Cu, Mn, Ni, Pb, Zn and Ba) significantly higher than in the sand from Jaz, a locality with one of the lowest dose rates.
已使用高纯锗（HPGe）光谱仪测定了从黑山海岸20个著名海滩采集的沙子样本中天然存在的放射性核素（226）镭、（232）钍、（40）钾和人为（137）铯的活度浓度。发现平均活度浓度分别为7.4、5.2、97.3和0.5贝可勒尔每千克（Bq kg⁻¹）。对于所有沙子样本，已评估镭当量活度，发现其低于370贝可勒尔每千克（Bq kg⁻¹）的限值。外照射和内照射危害指数均小于1。性腺剂量当量估计平均为75微希沃特每年（μSv y⁻¹），约为全球土壤平均值（0.3毫希沃特每年，mSv y⁻¹）的四分之一。计算得出的吸收剂量率范围为3.1至28纳戈瑞每小时（nGy h⁻¹），低于世界平均值中位数（57纳戈瑞每小时，nGy h⁻¹）。有效剂量率范围为3.8至34.4微希沃特每年（μSv y⁻¹），显著低于公众推荐限值（1毫希沃特每年，mSv y⁻¹）。在大广场地区发现了最高剂量率，该地区的重金属含量（砷、硼、镉、汞、铬、铜、锰、镍、铅、锌和钡）也显著高于剂量率最低的地区之一贾兹的沙子中的含量。
