• H.-T. Shen, X.-G. Wang, S. Jiang, M. He, K.-J. Dong, C.-L. Li, G.-Z. He, S.-L. Wu, J. Gong, L.-Y. Lu, S.-Y. Wu
  CIAE, Beijing
• S.-Z. Li, D.-W. Zhang, S. Jiang, G.-Z. Shi, C.-T. Huang
  Guangxi University, Nanning

Funding: Supported by National Natural Science Foundation of China (10576040).

A new method was de­vel­oped for AMS mea­sure­ment of ¹²⁶Sn. Major fea­tures of the method in­clude the use of SnF₂ as tar­get ma­te­ri­al, the se­lec­tion of SnF₃^- molec­u­lar ions for ex­trac­tion form from the tar­get, and the trans­mis­sion of ¹²⁶Sn beam cur­rent. A sen­si­tiv­i­ty of (1.92±1.13)×10^-10 (¹²⁶Sn/Sn) has been reached by mea­sur­ing a blank sam­ple.

• X. Wang, H. Shen, S. Jiang, M. He, K. Dong, C. Li, W. Wang, S. Wu, Y. Bao, X. Guan, Y. Hu, Q. You
  CIAE, Beijing
• D. Zhang, G. Shi, C. Huang
  Guangxi University, Nanning

Funding: Work supported by the NSAF (National Nature Science Fundation- China Academy of Engineering Physics Fundation) No.10576040.

²³⁶U is a long-lived ra­dioac­tive iso­tope with a half-life of 2.342(3) ×10⁷ a, which pro­duced prin­ci­pal­ly by ther­mal neu­tron cap­ture on ²³⁵U. ²³⁶U is po­ten­tial­ly ap­plied in ge­o­log­i­cal re­search and nu­cle­ar safe­guards. Ac­cel­er­a­tor mass spec­trom­e­try (AMS) is present­ly the most sen­si­tive tech­nique for the mea­sure­ment of ²³⁶U. A method for AMS mea­sure­ment of long-lived heavy ion ²³⁶U was de­vel­oped at CIAE with the set up the AMS ded­i­cat­ed in­jec­tor and the newly pro­posed ²⁰⁸Pb¹⁶O₂^- molec­u­lar ions for the sim­u­la­tion of ²³⁶U ion trans­port. A sen­si­tiv­i­ty of lower than 10^-10 has been achieved for iso­topic ratio ²³⁶U/²³⁸U in pre­sent work.