本文介绍在建的中国先进研究堆(China Advanced Research Reactor,CARR)上的在线同位素分离器的三种离子源的原理、结构特点、实验结果。这三种不同的离子源是针对不同的放射性同位素,为了获取理想的束流而研制的。这三种离子源分别是...本文介绍在建的中国先进研究堆(China Advanced Research Reactor,CARR)上的在线同位素分离器的三种离子源的原理、结构特点、实验结果。这三种不同的离子源是针对不同的放射性同位素,为了获取理想的束流而研制的。这三种离子源分别是高温表面热电离离子源、弧放电离子源、边引出型潘宁源。其中高温表面热电离离子源内的钨电离器内的温度已达到2400℃,为我们研究难电离的稀土元素提供了保证。展开更多
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 sep...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.展开更多
文摘本文介绍在建的中国先进研究堆(China Advanced Research Reactor,CARR)上的在线同位素分离器的三种离子源的原理、结构特点、实验结果。这三种不同的离子源是针对不同的放射性同位素,为了获取理想的束流而研制的。这三种离子源分别是高温表面热电离离子源、弧放电离子源、边引出型潘宁源。其中高温表面热电离离子源内的钨电离器内的温度已达到2400℃,为我们研究难电离的稀土元素提供了保证。
基金supported by National Natural Science Foundation of China (No. 10875176)
文摘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.
