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Oral Sessions
Day 3, June 24（Tue.） 16:00-16:15
Room B (Maesato Center)
- 3B-O3-1600
Accelerator Mass Spectrometry Development and Capabilities at the Australian National University
(ANU)
oStephen Tims, Keith Fifield, Stefan Pavetich, Michaela Froehlich, Peter Medley
The AMS system at the Department of Nuclear Physics and Accelerator Applications at the Australian National University has unique detection capabilities that take advantage of the very high energies that can be obtained with the 14UD accelerator. Routine isotopes measured include 10Be, 26Al, 36Cl, 60Fe, 99Tc, 129I, 236U, 239Pu, 240Pu and 241Am with applications that are largely focused on environmental studies such as climate change and groundwater movement, but also on astrophysical processes and nuclear fuel cycle related activities.
The system allows selection of a range of custom designed ionization chambers and provides access to a split-pole Enge spectrometer, used as a gas-filled magnet, to suppress isobaric interference for a range of isotope species. For example, 60Fe/stable Fe ratios down to 10-17, have been reported with this instrument. Trials of a custom fast-switching isotope cycling system (used for 36Cl measurements) operating in a semi-fast mode and integrated with a 6 m long time of flight detection system are underway. This system aims to minimize interference from more abundant neighbouring masses during measurement of some actinide species. An overview of our measurement capabilities and some specific applications will be discussed.