A first attempt to measure Nb-92/Nb-93 ratios with Accelerator Mass Spectrometry

作者：He Guozhu; He Ming; Zhou Zuying; Li Zhenyu; Dong Kejun; Wu Shaoyong; Liu Shilong; Chen Xiongjun; Fan Qiwen; Li Chaoli; He Xianwen; Li Heng; Jiang Shan^*

来源：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms , 2013, 294: 132-135.

DOI：10.1016/j.nimb.2012.05.016

• AMS
• Nb-92
• Measurement

An Accelerator Mass Spectrometry (AMS) method for the measurement of the long-lived radionuclide Nb-92 has been established at the HI-13 Tandem Accelerator of the China Institute of Atomic Energy (CIAE). Niobium powder mixed with PbF2 by a ratio of 1:2 (in mass) was used as the cathode material. Atomic anions of Nb- were extracted from a Cs-beam sputter source. The terminal voltage of the tandem accelerator was 8.5 MV. Nb13+ ions were selected after terminal foil stripping. A multi-anode gas ionization chamber was used for the particle detection. The total suppression factor of the two major interfering isobars, Zr-92 and Mo-92, was about 10(3). A detection limit of about 10(-11) was achieved for Nb-92/Nb-93 ratio measurements on a blank sample.

• 出版日期2013-1
• 单位广西大学; 中国原子能科学研究院