New Measurement of the 60Fe Half-Life

被引：176
作者：
Rugel, G. [1 ]
Faestermann, T. [1 ]
Knie, K. [1 ]
Korschinek, G. [1 ]
Poutivtsev, M. [1 ]
Schumann, D. [2 ]
Kivel, N. [2 ]
Guenther-Leopold, I. [2 ]
Weinreich, R. [2 ]
Wohlmuther, M. [2 ]
机构：
[1] Tech Univ Munich, D-85748 Garching, Germany
[2] Paul Scherrer Inst, CH-5232 Villigen, Switzerland
来源：
PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 07期
关键词：
EARLY SOLAR-SYSTEM; RADIOCHEMICAL ANALYSIS; AL-26; NUCLEOSYNTHESIS; METALLICITY; IRON-60; STARS; MASS;
D O I：
10.1103/PhysRevLett.103.072502
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have made a new determination of the half-life of the radioactive isotope Fe-60 using high precision measurements of the number of Fe-60 atoms and their activity in a sample containing over 10(15) Fe-60 atoms. Our new value for the half-life of Fe-60 is (2.62 +/- 0.04) X 10(6) yr, significantly above the previously reported value of (1.49 +/- 0.27) X 10(6) yr. Our new measurement for the lifetime of Fe-60 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 Fe-60 measurements from supernovaejecta deposits on Earth.
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页数：4
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