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Settling the half-life of ⁶⁰Fe: fundamental for a versatile astrophysical chronometer

Wallner, A.; Bichler, M.; Buczak, K.; Dressler, R.; Fifield, L. K.; Schumann, D.; Sterba, J. H.; Tims, S. G.; Wallner, G.; Kutschera, W.


In order to resolve a recent discrepancy in the half-life of ⁶⁰Fe, we performed an independent measurement with a new method that determines the ⁶⁰Fe content of a material relative to Fe55 (t1/2=2.744yr) with accelerator mass spectrometry. Our result of (2.50±0.12)×10⁶yr clearly favors the recently reported value (2.62±0.04)×10⁶yr, and rules out the older result of (1.49±0.27)×10⁶yr. The present weighted mean half-life value of (2.60±0.05)×10⁶yr substantially improves the reliability as an...[Show more]

CollectionsANU Research Publications
Date published: 2015-01-28
Type: Journal article
Source: Physical Review Letters
DOI: 10.1103/PhysRevLett.114.041101


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