【作者】 周鹏； 徐茂泉； 刘广山；

【Author】 ZHOU Peng XU Maoquan LIU Guangshan College of Oceanography and Environmental Science,Xiamen University,State Key Laboratory of Marine Environmental Science in Xiamen University,Xiamen,Fujian,361005

【机构】 厦门大学海洋与环境学院近岸海洋环境科学国家重点实验室(厦门大学)；

【摘要】 用HPGe-γ谱方法测定了在福建省牛头山火山口采集的岩石中的放射性核素²³⁸U、²²⁶Ra、²¹⁰pb、²²⁸Th、²²⁸Ra 和⁴⁰K,样品有玄武岩和花岗岩,结果给出6种核素的比活度为1.6～94.7、LD 为30.5 Bq/kg、LD 为26.6Bq/kg、3.3～106Bq/kg、4.9～113Bq/kg 和28～1267Bq/kg,平均为13.5Bq/kg、5.5Bq/kg、8.9Bq/kg、13.0Bq/kg、16.1Bq/kg 和293Bq/kg。按放射性核素含量水平可以将玄武岩样品分为两个组。第1组样品中6种核素的含量平均为21.0Bq/kg、14.8Bq/kg、14.7Bq/kg、26.0Bq/kg、29.8Bq/kg 和749Bq/kg;第2组样品中6个核素含量平均为7.0Bq/kg、2.0Bq/kg、6.0Bq/kg、4.9Bq/kg、7.7Bq/kg 和142Bq/kg;花岗岩中6种核素的含量平均为57.7Bq/kg、19.0Bq/kg、21.7Bq/kg、62.2Bq/kg、67.4Bq/kg 和894Bq/kg。含量水平为:花岗岩大于第1组玄武岩第一组玄武岩大于第2组玄武岩。更多还原

【Abstract】 The natural radionuclides in volcanic rocks from the Niutou Hill,Fujian Province,were measured by HPGe-γ spectroscopy.The samples include granite and basalt.The contents of ²³⁸U,²²⁶Ra,²¹⁰Pb,²²⁸Th,²²⁸Ra and ⁴⁰K in all samples are 1.6～94.7,LD～30.5 Bq/kg,LD～26.6Bq/kg,3.3～106Bq/kg,4.9～113Bq/kg and 28～1267Bq/kg respectively,and the mean values are13.5Bq/kg,5.5Bq/kg,8.9Bq/kg,13.0Bq/kg,16.1Bq/kg and 293Bq/kg.There are two groups of basalt samples that havedifferent radionuclide values.The average contents of the six nuclides in the first group of basalt samples are 21.0Bq/kg,14.8Bq/kg,14.7Bq/kg,26.0Bq/kg,29.8Bq/kg and 749Bq/kg,those in the second group of basalt samples are 7.0Bq/kg,2.0Bq/kg,6.0Bq/kg,4.9Bq/kg,7.7Bq/kg and 142Bq/kg,and those in granite are 57.7Bq/kg,19.0Bq/kg,21.7Bq/kg,62.2Bq/kg,67.4Bq/kg and 894Bq/kg.The content level of 6 radinuclides in samples is in order of granite rocks>the first group of basalt rocks>the second group of basalt rocks.更多还原