Investigation of target materials for low energy accelerator mass spectrometry of 26Al

Dr Kejun Dong, Mrs Jiaqi Zhang, Prof. Sheng Xu

1Institute of Surface Earth System Science, School of Earth System Science, Tianjin University, , China

Aluminum-26 accelerator mass spectrometry (AMS) technique has been widely applied in many scientific fields. At present, most laboratories routinely use Al₂O₃ as the target material from which Al- is extracted. However, the lower Al- ion beam current limits the measurement sensitivity. In this study, a series of surveys on Al- ion beam current, conductive agent, and interference background were carried out based on previous research and the low-energy AMS system of Tianjin University. The results show that AlN as a potential target material to replace Al₂O₃ is worth further study, and Mg element is still one of the main interference factors for low-energy ²⁶Al-AMS.


Biography:

Dr. Dong comes from the AMS laboratory of Tianjin University in China. About 2000 14C, 500 10Be and 300 26Al samples have been determined since the AMS system was installed in the School of Earth System Science, Tianjin University in October 2017. The cosmogenic nuclides of 14C, 10Be and 26Al AMS techniques have been applied in the fields of geology, environment and marine science at Tianjin University. In this presentation, the topic of investigation of target materials for low energy accelerator mass spectrometry of 26Al will be introduced.

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