• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Energy and Environmental Protection >Natural Radioactivity of Topsoil in Two Granite Areas of Guangzhou, South China
【24h】

Natural Radioactivity of Topsoil in Two Granite Areas of Guangzhou, South China

机译：中国华南广州两种花岗岩地区的天然放射性

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The natural radionuclide (~(238)U, ~(226)Ra, ~(232)Th and ~(40)K) concentrations in 152 soil samples were determined from two major granite areas in Guangzhou, using high resolution γ-ray spectroscopic system based on the characteristic spectral peaks. The mean activity values for ~(238)U, ~(226)Ra,~(232)Th and ~(40)K were found to be 156.6±98.8,160.9±96.5,184.8±10T.5 and 832.5±493.1 Bq kg~(-1) dry mass, respectively. The absorbed dose rate (D) calculated from activity concentration of~(226) Ra, ~(232)Th and ~(40)K ranged from 53.2 to 497.1 nGy h~(-1) with a mean of 220.7 nGy h~(-1). The Radium equivalent activity (Ra_(eq)), the outdoor annual effective dose and the external hazard index (I_r), which resulted from the natural radionuclides in soil, were also calculated and found to vary from 119.7 to 1117.2 Bq kg~(-1), from 0.07 to 0.61 mSv and from 0.33 to 3.07, respectively. The radium equivalent activities and the external hazard index in all the soil samples were same as 64.5% higher than the limit of 370 Bq kg~(-1) and 1.0, respectively. The outdoor annual effective dose was higher than the worldwide mean value of 0.07 mSv.
机译：自然放射性核素（〜（238）u，〜（226）Ra，〜（232）Th和〜（40）k）浓度在152种土壤样品中，从广州两个主要的γ射线光谱法测定了广州的两个主要花岗岩区域基于特征光谱峰的系统。 〜（238）U，〜（226）Ra，〜（232）Th和〜（40）k的平均活性值为156.6±98.8,160.9±96.5,184.8±10t.5和832.5±493.1 BQ kg〜（-1）干肿块。由〜（226）Ra的活性浓度计算的吸收剂量率（D），〜（232）Th和〜（40）k的范围为53.2至497.1 ngy h〜（-1），其平均值为220.7 ngy h〜（ -1）。还计算出土壤中的天然放射性核素导致的镭才（RA_（EQ）），户外年度有效剂量和外部危害指数（I_R），并发现从119.7至1117.2 bq kg〜（ - 1），0.07至0.61msv分别为0.33至3.07。所有土壤样品中的镭等同活动和外部危险指数分别比370bq kg〜（-1）和1.0的极限高度为64.5％。户外有效剂量高于全球平均值0.07msV。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号