Isobaric identification techniques of AMS at CIAE

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• 作者：Chaoli Li ; Yongjing Guan ; Shan Jiang ; Ming He ; Xiangdong Ruan ; Wei Wang ; Dawei Zhang ; Jian Yuan ; Shaoyong Wu ; Kejun Dong
• 关键词：Isobaric identification ; AMS ; GFM-TOF ; Bragg Curve detector ; Δ ; E-Q3D
• 刊名：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
• 出版年：2010
• 出版时间：April 2010
• 年：2010
• 卷：268
• 期：7-8
• 页码：876-879
• 全文大小：527 K

文摘

Some long-lived nuclides, such as ³⁶Cl, ⁴¹Ca, ⁵³Mn, ⁷⁹Se, etc., are very interested in life science, environment science, geo- and cosmo-sciences, nuclear wastes management, and other fields. Taking the advantages in high sensitivity and the strong ability to reduce the interferences from molecular ions and isobars, AMS has been one of the most promising methods for the measurement of these nuclides. However, the sensitivity of AMS is often unsatisfactory due to the interferences of stable isobars especially for medium and heavy radioisotopes. Gas-filled time of flight (GF-TOF), Gas-filled Magnet with a time of flight (GFM-TOF), Bragg Curve detector and energy loss (ΔE) combined with a Q3D magnetic spectrometer (ΔE-Q3D) are among the techniques used or being developed in AMS lab of China Institute of Atomic Energy, in an attempt to further reduce the interferences from isobars. These techniques will be tested in our AMS measurement of ⁵³Mn, ⁷⁹Se, ⁹³Zr, ⁹⁹Tc, etc., for identifying isobaric interferences.