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Title:
New Measurement of the Fe60 Half-Life
Authors:
Rugel, G.; Faestermann, T.; Knie, K.; Korschinek, G.; Poutivtsev, M.; Schumann, D.; Kivel, N.; Günther-Leopold, I.; Weinreich, R.; Wohlmuther, M.
Affiliation:
AA(Technische Universität München, D-85748 Garching bei München, Germany), AB(Technische Universität München, D-85748 Garching bei München, Germany), AC(Technische Universität München, D-85748 Garching bei München, Germany), AD(Technische Universität München, D-85748 Garching bei München, Germany), AE(Technische Universität München, D-85748 Garching bei München, Germany), AF(Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland), AG(Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland), AH(Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland), AI(Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland), AJ(Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland)
Publication:
Physical Review Letters, vol. 103, Issue 7, id. 072502 (PhRvL Homepage)
Publication Date:
08/2009
Origin:
APS
PACS Keywords:
Lifetimes, Nucleosynthesis in late stellar evolution, Nucleosynthesis in novae supernovae and other explosive environments, 59<, =A<, =89
DOI:
10.1103/PhysRevLett.103.072502
Bibliographic Code:
2009PhRvL.103g2502R

Abstract

We have made a new determination of the half-life of the radioactive isotope Fe60 using high precision measurements of the number of Fe60 atoms and their activity in a sample containing over 1015 Fe60 atoms. Our new value for the half-life of Fe60 is (2.62±0.04)×106yr, significantly above the previously reported value of (1.49±0.27)×106yr. Our new measurement for the lifetime of Fe60 has significant implications for interpretations of galactic nucleosynthesis, for determinations of formation time scales of solids in the early Solar System, and for the interpretation of live Fe60 measurements from supernova-ejecta deposits on Earth.
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