Age determination for uranium standard samples by 231Pa/235U radiochronometer

  • Yan ChenEmail author
  • Sheng-Hui Huang
  • Rui-Xuan Hu
  • Yong-Gang Zhao
  • Li-Li Li
  • Jia-Jun Zhou
  • Chun Li
  • Ji-Long Zhang
  • Zhao-Hui Wu


Developing different model age determination methods of uranium sample could get more information on insight into source and suspected use in nuclear forensic investigation. A procedure for the determination of model age of uranium sample using 231Pa/235U radiochronometer was reported. The 233Pa spike used in the procedure of 231Pa–235U model age determination was separated from in-house 237Np stock solution by using two TRU resin columns and three silica gel columns and calibrated by CRM U100. Model ages of CRM U010 and IRMM-1000b were presented. The model age of IRMM-1000b using 231Pa/235U radiochronometer were older than the literature reported results by 230Th/234U radiochronometer by amounts exceeded the expanded uncertainty.


Uranium age 233Pa spike Nuclear forensics ICP-MS 


Compliance with ethical standards

Conflict of interest

The authors declared that they have no conflicts of interest to this work.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.Department of RadiochemistryChina Institute of Atomic EnergyBeijingChina
  2. 2.State Nuclear Security Technology CenterBeijingChina

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