Interstellar 60Fe on the Surface of the Moon

被引：101

作者：

Fimiani, L. ^{[1
]}

Cook, D. L. ^{[2
,4
]}

Faestermann, T. ^{[1
]}

Gomez-Guzman, J. M. ^{[1
]}

Hain, K. ^{[1
]}

Herzog, G. ^{[2
]}

Knie, K. ^{[1
,5
]}

Korschinek, G. ^{[1
]}

Ludwig, P. ^{[1
]}

Park, J. ^{[2
]}

Reedy, R. C. ^{[3
]}

Rugel, G. ^{[1
,6
]}

机构：

[1] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany

[2] Rutgers State Univ, Dept Chem & Chem Biol, Piscataway, NJ 08854 USA

[3] Planetary Sci Inst, Los Alamos, NM 87544 USA

[4] ETH, CH-8092 Zurich, Switzerland

[5] GSI Darmstadt, Planckstr 1, D-64291 Darmstadt, Germany

[6] Helmholtz Zentrum Dresden Rossendorf, D-01314 Dresden, Germany

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 116卷 / 15期

关键词：

HALF-LIFE; MASSIVE STARS; NUCLEOSYNTHESIS; BE-10; MN-53; EARTH; GAS; AMS;

D O I：

10.1103/PhysRevLett.116.151104

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A dying massive star ends in a supernova explosion ejecting a large fraction of its mass into the interstellar medium. If this happens nearby, part of the ejecta might end on Solar System bodies and, in fact, radioactive Fe-60 has been detected on the Pacific ocean floor in about 2 Ma old layers. Here, we report on the detection of this isotope also in lunar samples, originating presumably from the same event. The concentration of the cosmic ray produced isotope Mn-53, measured in the same samples, proves the supernova origin of the Fe-60. From the Fe-60 concentrations found we deduce a reliable value for the local interstellar fluence in the range of 1 x 10(8) at/cm(2). Thus, we obtain constraints on the recent and nearby supernova(e).

引用

页数：5

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