Preliminary study of 10Be/7Be in rainwater from Xi'an by Accelerator Mass Spectrometry

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Li Zhang and Yun-Chong Fu. Preliminary study of 10Be/7Be in rainwater from Xi'an by Accelerator Mass Spectrometry[J]. Chinese Physics C, 2017, 41(1): 018201. doi: 10.1088/1674-1137/41/1/018201
Li Zhang and Yun-Chong Fu. Preliminary study of 10Be/7Be in rainwater from Xi'an by Accelerator Mass Spectrometry[J]. Chinese Physics C, 2017, 41(1): 018201.  doi: 10.1088/1674-1137/41/1/018201 shu
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Received: 2016-05-06
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    Supported by National Natural Science Foundation of China (11205161) and CAS Key Technology Talent Program

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Preliminary study of 10Be/7Be in rainwater from Xi'an by Accelerator Mass Spectrometry

    Corresponding author: Yun-Chong Fu,
  • 1. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China
  • 2. Xi'an AMS Center, Shaanxi Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi'an 710061, China
  • 3. University of Chinese Academy of Sciences, Beijing 100049, China
  • 4. Xi'an AMS Center, Shaanxi Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi'an 710061, China
Fund Project:  Supported by National Natural Science Foundation of China (11205161) and CAS Key Technology Talent Program

Abstract: The 10Be/7Be ratio is a sensitive tracer for the study of atmospheric transport, particularly with regard to stratosphere-troposphere exchange. Measurements with high accuracy and efficiency are crucial to 7Be and 10Be tracer studies. This article describes sample preparation procedures and analytical benchmarks for 7Be and 10Be measurements at the Xi'an Accelerator Mass Spectrometry (Xi'an-AMS) laboratory for the study of rainwater samples. We describe a sample preparation procedure to fabricate beryllium oxide (BeO) AMS targets that includes co-precipitation, anion exchange column separation and purification. We then provide details for the AMS measurement of 7Be and 10Be following the sequence BeO-→Be2+→Be4+ in the Xi'an-AMS. The 10Be/7Be ratio of rainwater collected in Xi'an is shown to be about 1.3 at the time of rainfall. The virtue of the method described here is that both 7Be and 10Be are measured in the same sample, and it is suitable for routine analysis of large numbers of rainwater samples by AMS.

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