Developing AMS measurement of 59Ni at CIAE

Accelerator mass spectrometry (AMS) measurement of ⁵⁹Ni has been established at CIAE with the HI-13 tandem accelerator and the recently developed ΔE-Q3D detection system. ⁵⁹Ni standard and commercial NiO samples were measured to check the performance of the ΔE-Q3D detection system on ⁵⁹Ni isobar separation and suppression. An overall suppression factor of about 10⁷ for the interfering isobar ⁵⁹Co resulting in detection sensitivity as low as 3.8×10^-13 atomic ratio (⁵⁹Ni/Ni) has been obtained. Based on these techniques, the AMS measurement method of ⁵⁹Ni with high sensitivity is developed.     

Recent progress in AMS measurement of 182Hf at the CIAE

In order to improve the accuracy of accelerator mass spectrometry (AMS) measurement for ¹⁸²Hf/¹⁸⁰Hf, a series of measurements have been taken in the AMS laboratory at the China Institute of Atomic Energy (CIAE). The major ones include the instantaneous monitoring of ¹⁸⁰HfF₅^- current, testing the stability of transmission, the alternate measurements of an unknown sample and standard, and the origin identification and minimization of background ¹⁸²W. The experimental details and the improvement in the measurement accuracy, as well as some useful suggestions for better satisfying the requirements of certain practical applications, are presented in this paper.