AMS measurement of ~(36)Cl with a Q3D magnetic spectrometer at CIAE (Conference Paper)

摘要

The ratio of ~(36)Cl/Cl can determine the exposure age of surface rocks and monitor the secular equilibrium of ~(36)Cl of sedimentary and igneous rock in groundwater. Due to the uncertainty effects of different chemical separation processes for removing ~(36)S, there is a high degree of uncertainty in ~(36)Cl accelerator mass spectrometry (AMS) measurements if the ratio of ~(36)Cl/Cl is lower than 10 ~(-14). A ~(36)Cl AMS higher sensitivity measurement has been set up by using a ΔE-Q3D method at the China Institute of Atomic Energy (CIAE). The performances of ΔE-Q3D method for ~(36)Cl-AMS measurement had been systemically studied. The experimental results show that the ΔE-Q3D method has a higher isobar suppression factor. Taking advantage of direct removing ~(36)S, the sample preparation can be simplified and the uncertainty effects of different chemical separation processes can be reduced in ~(36)Cl AMS measurements.