Indication for Supernova Produced 60 Fe Activity on Earth
Indication for Supernova Produced 60 Fe Activity on Earth
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DOI：
10.1103/physrevlett.83.18
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发表时间：
1999-07
影响因子：
8.6
通讯作者：
K. Knie;G. Korschinek;T. Faestermann;C. Wallner;J. Scholten;W. Hillebrandt
中科院分区：
文献类型：
--
作者：
K. Knie;G. Korschinek;T. Faestermann;C. Wallner;J. Scholten;W. Hillebrandt
用高灵敏度加速器质谱法测定了深海锰铁地壳中过量的${}^{60}\mathrm{Fe}$放射性。在三层中的前两层（分别对应于0\char21{}2.8 Myr和3.7\char21{}5.9 Myr）测量的浓度增加表明，超新星沉积在地球上产生了${}^{60}\ mathm {Fe}$。甚至有一个微弱的迹象表明，进入地壳的通量在大约5万年前更高。
In a deep ocean ferromanganese crust an excess of ${}^{60}\mathrm{Fe}$ radioactivity was measured by means of high sensitivity accelerator mass spectrometry. The enhanced concentrations measured in the first two of three layers (corresponding to a time span of 0\char21{}2.8 Myr and 3.7\char21{}5.9 Myr, respectively) suggest the deposition of supernova produced ${}^{60}\mathrm{Fe}$ on earth. There is even a weak indication that the flux into the crust was higher about 5 Myr ago.