1) 137Cs dating
137Cs定年
2) ~(137)Cs dating
137Cs计年
1.
Combining the method of()~(137)Cs dating with the ways of general sampling and measurement can easily resolve the problem of absence of data and also provide the possibility for calculating weighted environmental quality comprehensive index using the adjusted analytical hierarchy process(AHP) method.
评价沉积物综合质量及了解其演变情况时,常会受困于缺乏监测数据尤其是历史数据,将137Cs计年法与一般的取样测试相配合,可以较方便地解决此问题。
3) 137Cs and 210Pb dating
137Cs、210Pb计年
4) 210Pb and 137Cs dating
210Pb和137Cs测年
5) ~(137)Cs
137Cs
1.
The basis of the ~(137)Cs technique and the uses of this technique to investigate the sedimentation rates of suspended sediments deposited on river floodplains are reviewed to identify the sources of sediments and to research the sediment-associated contaminates on river floodplains.
人工同位素137Cs可以作为环境示踪因子研究河漫滩沉积物。
2.
Based on the methodology of study on water, soil environmental capacity and mass conservation theory in a system, the concept and model on sediment environmental capacity for ~(137)Cs in Daya Bay are developed.
参照水、土壤环境容量研究方法,提出沉积物环境容量的定义,并根据系统中物质平衡理论建立模型,对大亚湾沉积物中的137Cs环境容量进行了研究,计算了大亚湾内表层沉积物中137Cs的静容量,并选择代表性生物,计算了近岸区的年动容量和总动容量。
3.
This paper represents the study of migration of~(90)Sr and~(137)Cs in a kind of aerated zone soil.
本文叙述了放射性废物中具有代表性的裂变核素90Sr,137Cs在某种包气带土壤中的迁移情况研究。
6) 137 Cs
137Cs
1.
The results show that: (1) the wall of the waste disposition pit has a good capacity to stop leaking of the radioactive liquid; (2) 226 Ra and 232 Th have almost the same characteristic when they migrate with water through soil; (3) the migration velocity of 137 Cs in soil is about 1.
结果表明 :(1 )填埋坑壁和坑底对防止放射性核素废液的渗透具有很好的阻隔能力 ;(2 )核素2 2 6 Ra与2 32 Th在土壤中具有几乎相同的迁移特点 ;(3 )核素137Cs在土壤中的迁移速度约为 1 。
2.
This review describes research progress of several methods of 137 Cs removal from acidic high level liquid waste such as precipitation, volatilization, solvent extraction, inorganic ion exchange.
概要综述了从酸性高放废液中去除 (回收 ) 137Cs的沉淀、挥发、溶剂萃取和无机离子交换等方法的研究进展 ,并对各种方法的优缺点进行了讨
3.
In this paper, the results of the 90 Sr and 137 Cs contents in biologic samples and the natural U in soil samples obtained in a joint effort by fourteen environmental radiation laboratories in the Chinese environmental protection system were analyzed and compared.
本文报道了有环保系统 14个环境放射性实验室参加的生物样中 90 Sr、137Cs及土壤样中天然铀含量的分析比对方法及其结果。
补充资料：铯-137(cesium-137)
【铯-137】(cesium-137)质量数为137的铯的放射性核素。符号`^137Cs`。半衰期30.174年。发射`\beta^-`辐射（主要能量为0.512兆电子伏）和`\gamma`辐射（能量为0.661兆电子伏）。可从核燃料裂变产物中提取。可制作标准源，并可制成一种封闭的辐射源装置，用于工业、农业、医学等方面。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条