AMS measurement technology for 182Hf

作者：Li Zhen Yu^*; Jiang Shan; He Ming; Dong Ke Jun; Hu Hao; Zheng Guo Wen; Li Heng; Wang Xiao Bo; Xie Lin Bo; Lin De Yu; Dou Liang; Wu Shao Yong; You Qu Bo; Bao Yi Wen

来源：Atomic Energy Science and Technology, 2013, 47(2): 172-177.

DOI：10.7538/yzk.2013.47.02.0172

• AMS
• Measurement methods
• Measurement results
• Measurement techniques
• Measurement technologies
• Nuclear environments
• Relative uncertainty
• Rock sample

In order to improve the accuracy of AMS measurement for 182Hf/180Hf, a series of improvement and innovations of measurement technique and method were taken, such as chemical synthesis of 182Hf free samples, technique of monitoring off-axis current simultaneously, testing the stability of accelerator system, performing the alternate measurement, modified deduction method of 182W, testing the measurement method with simulated samples and real rock samples, and testing the reliability of measurement results. The experimental results show that the relative uncertainty is about 12% for the simulated samples to the order of 1×10-10 (182Hf/180Hf), which satisfies the requirement of measurements for real rock samples. The reason of big uncertainty with the rock sample mainly lies in the high content of W in the rock sample.

• 出版日期2013