Analysis of the 40K levels in soil using gamma spectrometry
Analysis of the 40K levels in soil using gamma spectrometry
复制标题
使用伽马能谱法分析土壤中的 40K 水平
DOI：
--
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
R. S. Amaral
中科院分区：
文献类型：
--
作者：
J. A. S. Júnior;Jorge João Ricardo Ferreira Cardoso;C. M. Silva;S. V. Silveira;R. S. Amaral
在巴西伯南布哥州西部的一个面积为40，000 m2的地区测定了土壤中的钾-40。对于辐射测量，使用具有高纯度锗（HPGe）探测器的伽马光谱法。以25 m的间隔对78个土壤样品进行了取样。根据1.46MeV的电子峰计算了40 K的比活度。测得的数值为541 - 3，572 Bq kg-1（平均值为1，827 Bq kg-1）。这些数值使得能够确定元素浓度以及地面以上1米处空气中的吸收剂量率。数值分别为1.7 - 11.5%（平均6%）和23.4 - 154.3 nGy h-1（平均79 nGy h-1）。
Potassium-40 was determined in soil in an area with 40,000 m2 situated in the western State of Pernambuco, Brazil. For radiometric measurements, the gamma spectrometry method with a high purity germanium (HPGe) detector was used. Sampling of 78 soil samples has been performed at intervals of 25 m. The specific activities of 40K were calculated based on the photopeak of 1.46 MeV. Values from 541 to 3,572 Bq kg-1 were obtained (mean of 1,827 Bq kg-1). These values allowed the determination of the elemental concentrations as well as the absorbed dose rates in air, 1 m above the ground. The values varied from 1.7 to 11.5% (mean of 6%) and from 23.4 to 154.3 nGy h-1 (mean of 79 nGy h-1), respectively.