Refine your search:     
Report No.

Uranium age-dating using in-situ isotope ratios by thermal ionization mass spectrometry for nuclear forensics

Okubo, Ayako; Shinohara, Nobuo ; Magara, Masaaki 

The model date of two enriched uranium materials were determined using a new method for nuclear forensics investigation. In this method, the $$^{230}$$Th/$$^{234}$$U ratio was calculated without spike addition from measured ratios of $$^{230}$$Th/$$^{234}$$Th and $$^{234}$$U/$$^{238}$$U, and calculated $$^{234}$$Th/$$^{238}$$U ratio in secular equilibrium. The obtained model date for the low-enriched uranium material was agreed with the known production date within uncertainty. For the highly enriched uranium material, slightly younger model date than the known production date was obtained. The $$^{234}$$U interference on $$^{234}$$Th counting in thermal ionization mass spectrometry measurement was suspected as a potential cause.



- Accesses




Category:Chemistry, Analytical



[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.