Precise initial abundance of Niobium-92 in the Solar System and implications for p-process nucleosynthesis
dc.contributor.author
Haba, Makiko K.
dc.contributor.author
Lai, Yi-Jen
dc.contributor.author
Wotzlaw, Jörn-Frederik
dc.contributor.author
Yamaguchi, Akira
dc.contributor.author
Lugaro, Maria
dc.contributor.author
Schönbächler, Maria
dc.date.accessioned
2021-03-04T10:06:31Z
dc.date.available
2021-03-03T08:32:31Z
dc.date.available
2021-03-04T10:06:31Z
dc.date.issued
2021-02-23
dc.identifier.issn
0027-8424
dc.identifier.issn
1091-6490
dc.identifier.other
10.1073/pnas.2017750118
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/472632
dc.description.abstract
The niobium-92–zirconium-92 (92Nb–92Zr) decay system with a half-life of 37 Ma has great potential to date the evolution of planetary materials in the early Solar System. Moreover, the initial abundance of the p-process isotope 92Nb in the Solar System is important for quantifying the contribution of p-process nucleosynthesis in astrophysical models. Current estimates of the initial 92Nb/93Nb ratios have large uncertainties compromising the use of the 92Nb–92Zr cosmochronometer and leaving nucleosynthetic models poorly constrained. Here, the initial 92Nb abundance is determined to high precision by combining the 92Nb–92Zr systematics of cogenetic rutiles and zircons from mesosiderites with U–Pb dating of the same zircons. The mineral pair indicates that the 92Nb/93Nb ratio of the Solar System started with (1.66 ± 0.10) × 10−5, and their 92Zr/90Zr ratios can be explained by a three-stage Nb–Zr evolution on the mesosiderite parent body. Because of the improvement by a factor of 6 of the precision of the initial Solar System 92Nb/93Nb, we can show that the presence of 92Nb in the early Solar System provides further evidence that both type Ia supernovae and core-collapse supernovae contributed to the light p-process nuclei. © 2021 National Academy of Sciences
en_US
dc.language.iso
en
en_US
dc.publisher
National Academy of Sciences
en_US
dc.subject
Niobium-92
en_US
dc.subject
short-lived radionuclide
en_US
dc.subject
Zr isotopes
en_US
dc.subject
mesosiderite
en_US
dc.subject
p--process nucleosynthesis
en_US
dc.title
Precise initial abundance of Niobium-92 in the Solar System and implications for p-process nucleosynthesis
en_US
dc.type
Journal Article
dc.date.published
2021-02-19
ethz.journal.title
Proceedings of the National Academy of Sciences of the United States of America
ethz.journal.volume
118
en_US
ethz.journal.issue
8
en_US
ethz.journal.abbreviated
Proc Natl Acad Sci U S A
ethz.pages.start
e2017750118
en_US
ethz.size
7 p.
en_US
ethz.grant
Probing the origin of the Moon with non-traditional stable isotopes
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Washington, DC
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erd- und Planetenwissenschaften / Dep. of Earth and Planetary Sciences::02725 - Institut für Geochemie und Petrologie / Institute of Geochemistry and Petrology::03946 - Schönbächler, Maria / Schönbächler, Maria
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erd- und Planetenwissenschaften / Dep. of Earth and Planetary Sciences::02725 - Institut für Geochemie und Petrologie / Institute of Geochemistry and Petrology::09656 - Chelle-Michou, Cyril / Chelle-Michou, Cyril
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erd- und Planetenwissenschaften / Dep. of Earth and Planetary Sciences::02725 - Institut für Geochemie und Petrologie / Institute of Geochemistry and Petrology::03946 - Schönbächler, Maria / Schönbächler, Maria
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erd- und Planetenwissenschaften / Dep. of Earth and Planetary Sciences::02725 - Institut für Geochemie und Petrologie / Institute of Geochemistry and Petrology::09656 - Chelle-Michou, Cyril / Chelle-Michou, Cyril
ethz.grant.agreementno
149282
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
Projekte MINT
ethz.date.deposited
2021-03-03T08:32:56Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2021-03-04T10:06:41Z
ethz.rosetta.lastUpdated
2022-03-29T05:36:58Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
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