Manganese-53: Development of the AMS technique for exposure-age dating applications

L. G. Gladkis, L. K. Fifield, C. R. Morton*, T. T. Barrows, S. G. Tims

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review


    The cosmogenic isotope 53Mn is produced by spallation of iron in surface rocks. The long half life of this isotope makes it attractive for use in erosion rate studies in slowly eroding landscapes such as Australia. We describe the development of AMS methods for detection of 53Mn using the 14UD accelerator at the Australian National University. The first step of this development involved the production of 53Mn using a heavy-ion fusion-evaporation reaction to make test standards. Then, the chemistry protocol for isolating 53Mn and reducing the Cr levels, of which 53Cr is a serious interfering isobar, was developed. Lastly we employed a gas-filled magnet which was used to discriminate 53Mn from the intense 53Cr background.

    Original languageEnglish
    Pages (from-to)236-240
    Number of pages5
    JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
    Issue number1
    Publication statusPublished - 1 Jun 2007


    • Accelerator mass spectrometry
    • Chromium suppression
    • Erosion rate studies
    • Gas-filled magnet
    • Manganese-53


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