摘要
The ratio of 36Cl/Cl can determine the exposure age of surface rocks and monitor the secular equilibrium of 36Cl of sedimentary and igneous rock in groundwater. Due to the uncertainty effects of different chemical separation processes for removing 36S, there is a high degree of uncertainty in 36Cl accelerator mass spectrometry （AMS） measurements if the ratio of 36Cl/Cl is lower than 10-14. A 36Cl1 AMS higher sensitivity measurement has been set up by using a AE-Q3D method at the China Institute of Atomic Energy （CIAE）. The performances of AE-Q3D method for 36Cl-AMS measurement had been systemically studied. The experimental results show that the AE-Q3D method has a higher isobar suppression factor. Taking advantage of direct removing 36S, the sample preparation can be simplified and the uncertainty effects of different chemical separation processes can be reduced in 36Cl AMS measurements.
The ratio of 36Cl/Cl can determine the exposure age of surface rocks and monitor the secular equilibrium of 36Cl of sedimentary and igneous rock in groundwater. Due to the uncertainty effects of different chemical separation processes for removing 36S, there is a high degree of uncertainty in 36Cl accelerator mass spectrometry （AMS） measurements if the ratio of 36Cl/Cl is lower than 10-14. A 36Cl1 AMS higher sensitivity measurement has been set up by using a AE-Q3D method at the China Institute of Atomic Energy （CIAE）. The performances of AE-Q3D method for 36Cl-AMS measurement had been systemically studied. The experimental results show that the AE-Q3D method has a higher isobar suppression factor. Taking advantage of direct removing 36S, the sample preparation can be simplified and the uncertainty effects of different chemical separation processes can be reduced in 36Cl AMS measurements.
基金
supported by National Natural Science Foundation of China (No. 10875176)
