New results on Xi’an-AMS and sample preparation systems at Xi’an-AMS center

The Institute of Earth Environment of the Chinese Academy of Sciences and Xi’an Jiaotong University have jointly created an AMS center based on a 3 MV multi-element accelerator mass spectrometer (AMS). The main focus of the Xi’an-AMS center will be earth environmental studies, archeology and biomedical research. This paper summarizes that the end-user recognized features of the Xi’an-AMS and reports new results obtained during the final acceptance tests for nuclides ¹⁰Be and ²⁶Al, for which the background for ratio ¹⁰Be/⁹Be of 3.65 × 10⁻¹⁵ was demonstrated and the ²⁶Al precision test with terminal 3 MV was performed. We also introduce the new built graphite and BeO sample preparation systems and the preparation procedures. We also discuss the recent measurements obtained using our new machine after the acceptance tests.