期刊论文

Determination of ~(238)U and ~(40)K in sediment cores in Nansha sea area and their depth profiles

中文

环境化学

0254-6108

2018

37

5

968-973

10.7524/j.issn.0254-6108.2017070403

国家级大学生创新创业训练计划支持项目

本校为第一机构

用HPGe γ谱方法测定了6个来自南沙海域沉积物岩心的~(238)U和~(40)K,获得结果如下: ~(238)U的放射性活度变化范围为(13.87± 1.73) —(46.63± 3.08) Bq·kg~(-1),平均值的变化范围为(19.30± 1.72) —(43.19± 3.06) Bq·kg~(-1); ~(40)K的放射性活度变化范围为(147.37±8.13) —(569.35±11.11) Bq·kg~(-1),平均值的变化范围为(159.32±6.51) —(471.30±9.16) Bq·kg~(-1).与其他海域比较发现,本研究海域的~(238)U活度范围及平均值与其他海域比较接近,而~(40)K的活度范围与平均值则比其他海域要稍低点.这两个核素的深度变化趋势均随深度的增加有微弱的增大、减小或不明显变化的3种类型,相比...

~(238)U and ~(40)k in six sediment cores in Nansha sea were measured by HPGe gamma spectrometry. The results showed that the activity of ~(238)U in these cores ranged from 13.87 ± 1.73 Bq·kg~(-1) to 46.63±3.08 Bq·kg~(-1) and the range of the average value was 19.30±1.72 Bq·kg~(-1) to 43.19± 3.06 Bq·kg~(-1) . As for ~(40)k,the activity ranged from 147.37 ± 8.13 Bq·kg~(-1) to 569.35 ± 11.11 Bq·kg~(-1) and the range of the average value was 159.32 ± 6.51 Bq·kg~(-1) to 460.08 ± 10.34 Bq·kg~(-1) . Comparing with the results in other ...