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Progress in AMS measurement of natural 32 Si for glacier ice dating

Morgenstern, Uwe; Fifield, L Keith; Tims, Stephen; Ditchburn, Robert G.


AMS measurement of 32Si can allow for ice core dating over the last thousand years. Technique developments are reported. Necessary negative-ion yields of 20-30% can now be consistently achieved, and permit an overall efficiency from ice sample to detector of ∼1%. A 30Si-spike technique has overcome the problem of extremely low intrinsic silicon concentration, with the added benefit of allowing determination of ppb-level silicon via isotope dilution. Improvements have also been made to the...[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
Source: Nuclear Instruments and Methods in Physics Research: Section B
DOI: 10.1016/j.nimb.2009.10.019


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