239Pu的紧凑型AMS系统测量技术方法研究
The Measurement Technology Method of 239Pu with the Developed Compact AMS System
赵庆章 1张文慧 1何明 1修诚利 1郭巍 1李建良 1李康宁 1包轶文 1游曲波 1苏胜勇1
作者信息
- 1. 中国原子能科学研究院,北京 102413
- 折叠
摘要
随着技术的不断改进,中国原子能科学研究院在前期研制的低能量AMS装置的基础上,又研制了紧凑型AMS装置.本工作就是基于新建立的紧凑型AMS装置,开展239Pu的测量技术研究.为了实现239Pu的AMS系统传输,利用238U系统性研究了剥离气体种类、剥离价态选择、剥离气体厚度、预加速电压与传输效率的关系,建立了紧凑型加速器质谱装置的239Pu最佳传输条件;通过系列标准样品和空白样品的测定,验证了装置测量线性R2=0.999 7,得到了紧凑型加速器质谱对239Pu的探测限为0.1fg.为开展239Pu在环境、地质等方面的广泛应用奠定了基础.
Abstract
With the technology improvement,a compact Accelerator Mass Spectrometry(AMS)device has been developed by China Institute of Atomic Energy on the basis of the low-energy AMS device developed earlier.The measurement method of239Pu was investigated with newly established compact AMS device.In order to establish the239Pu transport with the AMS system,the relationships of the transmission efficiency with the type of stripping gas,the selection of charge states,the thick-ness of stripping gas and the pre-acceleration voltage were systematically studied by using 238U,and then the optimized condi-tions of 239Pu measurement with the AMS system is established.It is verified that the linear R2 of the device is 0.999 7 and the detection limit of 239Pu is 0.1 fg through a series of standard samples and blank samples.It lays a foundation for the wide ap-plication of 239Pu in environmental and geological fields.
关键词
紧凑型AMS/239Pu/测量技术研究Key words
compact AMS/239Pu/study of the measurement technology引用本文复制引用
出版年
2024
NETL
NSTL
万方数据