The elusive 60Fe in the solar nebula

Frederic Moynier; Janne Blichert-Toft; Kun Wang; Gregory F. Herzog; Francis Albarede

doi:10.1088/0004-637X/741/2/71

The elusive ⁶⁰Fe in the solar nebula

Frederic Moynier
, Janne Blichert-Toft
, Kun Wang
, Gregory F. Herzog
, Francis Albarede

Department of Earth & Planetary Sciences

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

No ⁶⁰Ni or ⁶¹Ni anomalies have been detected in troilite inclusions from Muonionalusta, a 4565.3 0.1 Ma old IVA iron meteorite, to the level of the analytical precision of 10 ppm. Because Muonionalusta troilite is very old, has a high Fe/Ni ratio, and is free of ⁶¹Ni anomalies, it is the ideal material in which to search for potential excesses of ⁶⁰Ni produced by the decay of ⁶⁰Fe (t _1/2 = 2.62 Ma). The ⁶⁰Ni/⁵⁸Ni and Fe/Ni ratios (up to 1680) measured here imply an upper limit for the initial ⁶⁰Fe/ ⁵⁶Fe for the Muonionalusta troilite of 3 × 10^-9. Assuming that ⁶⁰Fe was homogeneously distributed across the nebula, this result suggests that the solar system initial ⁶⁰Fe/ ⁵⁶Fe ratio was less than 5 × 10^-9, which is lower than previously measured by at least a factor of 50.

Original language	English
Article number	71
Journal	Astrophysical Journal
Volume	741
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/741/2/71
State	Published - Nov 10 2011

Keywords

astrochemistry
minor planets, asteroids: general
nuclear reactions, nucleosynthesis, abundances
protoplanetary disks

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10.1088/0004-637X/741/2/71

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title = "The elusive 60Fe in the solar nebula",

abstract = "No 60Ni or 61Ni anomalies have been detected in troilite inclusions from Muonionalusta, a 4565.3 0.1 Ma old IVA iron meteorite, to the level of the analytical precision of 10 ppm. Because Muonionalusta troilite is very old, has a high Fe/Ni ratio, and is free of 61Ni anomalies, it is the ideal material in which to search for potential excesses of 60Ni produced by the decay of 60Fe (t 1/2 = 2.62 Ma). The 60Ni/58Ni and Fe/Ni ratios (up to 1680) measured here imply an upper limit for the initial 60Fe/ 56Fe for the Muonionalusta troilite of 3 × 10-9. Assuming that 60Fe was homogeneously distributed across the nebula, this result suggests that the solar system initial 60Fe/ 56Fe ratio was less than 5 × 10-9, which is lower than previously measured by at least a factor of 50.",

keywords = "astrochemistry, minor planets, asteroids: general, nuclear reactions, nucleosynthesis, abundances, protoplanetary disks",

author = "Frederic Moynier and Janne Blichert-Toft and Kun Wang and Herzog, \{Gregory F.\} and Francis Albarede",

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doi = "10.1088/0004-637X/741/2/71",

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volume = "741",

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T1 - The elusive 60Fe in the solar nebula

AU - Moynier, Frederic

AU - Blichert-Toft, Janne

AU - Wang, Kun

AU - Herzog, Gregory F.

AU - Albarede, Francis

PY - 2011/11/10

Y1 - 2011/11/10

N2 - No 60Ni or 61Ni anomalies have been detected in troilite inclusions from Muonionalusta, a 4565.3 0.1 Ma old IVA iron meteorite, to the level of the analytical precision of 10 ppm. Because Muonionalusta troilite is very old, has a high Fe/Ni ratio, and is free of 61Ni anomalies, it is the ideal material in which to search for potential excesses of 60Ni produced by the decay of 60Fe (t 1/2 = 2.62 Ma). The 60Ni/58Ni and Fe/Ni ratios (up to 1680) measured here imply an upper limit for the initial 60Fe/ 56Fe for the Muonionalusta troilite of 3 × 10-9. Assuming that 60Fe was homogeneously distributed across the nebula, this result suggests that the solar system initial 60Fe/ 56Fe ratio was less than 5 × 10-9, which is lower than previously measured by at least a factor of 50.

AB - No 60Ni or 61Ni anomalies have been detected in troilite inclusions from Muonionalusta, a 4565.3 0.1 Ma old IVA iron meteorite, to the level of the analytical precision of 10 ppm. Because Muonionalusta troilite is very old, has a high Fe/Ni ratio, and is free of 61Ni anomalies, it is the ideal material in which to search for potential excesses of 60Ni produced by the decay of 60Fe (t 1/2 = 2.62 Ma). The 60Ni/58Ni and Fe/Ni ratios (up to 1680) measured here imply an upper limit for the initial 60Fe/ 56Fe for the Muonionalusta troilite of 3 × 10-9. Assuming that 60Fe was homogeneously distributed across the nebula, this result suggests that the solar system initial 60Fe/ 56Fe ratio was less than 5 × 10-9, which is lower than previously measured by at least a factor of 50.

KW - astrochemistry

KW - minor planets, asteroids: general

KW - nuclear reactions, nucleosynthesis, abundances

KW - protoplanetary disks

UR - https://www.scopus.com/pages/publications/80155147154

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VL - 741

JO - Astrophysical Journal

JF - Astrophysical Journal

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ER -

The elusive ⁶⁰Fe in the solar nebula

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Keywords

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