AMS measurement of Mn-53 and its initial application at CIAE

作者：Dong, Kejun; Zhou, Duo; Xu, Yongning; He, Ming; Liu, Guangshan; Hu, Hao; Dou, Liang; Liu, Jiancheng; Wu, Shaoyong; Wang, Xianggao; Shen, Hongtao; Li, Kangning; You, Qubo; Sao, Yiwen; Hu, Yueming; Jin, Chunsheng; Yin, Xinyi; Jiang, Shan^*

来源：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms , 2015, 361: 58-62.

DOI：10.1016/j.nimb.2015.05.026

• Accelerator mass spectrometry
• Sample preparation
• Delta E-Q3D detection system
• Mn-53 measurements
• Ferromanganese crust

The determination of cosmogenic Mn-53 in terrestrial archives has important applications, such as burial ages, exposure age and erosion rates. Accelerator mass spectrometry (AMS) is the most sensitive technique to detect minute amounts of Mn-53. Mn-53 measurements were developed at the China Institute of Atomic Energy (CIAE) using the Delta E-Q3D equipped AMS system. This approach was recently optimized with the goal to reach the sensitivity required for AMS measurements of Mn-53 in deep-sea ferromanganese crust (DSFC) samples. Based on these improvements of sample preparation, current beam transmission and so on, Mn-53 in two samples of DSFC was measured by AMS. The ratios of Mn-53/Mn corresponding to an age of 3.77 +/- 0.42 and 13.73 +/- 2.74 Ma by I-129 dating method are (5.01 +/- 2.15) x 10(-13) and (1.90 +/- 0.96) x 10(-13). The ratios are close to the experimental reference values, deduced from the previous research. The experimental progress, performances and results are presented in this contribution.

• 出版日期2015-10-15
• 单位中国原子能科学研究院; 广西大学; 广西师范大学; 厦门大学