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DOI	10.1073/pnas.2017750118
	Precise initial abundance of Niobium-92 in the Solar System and implications for p-process nucleosynthesis
	Haba M.K.; Lai Y.-J.; Wotzlaw J.-F.; Yamaguchi A.; Lugaro M.; Schönbächler M.
发表日期	2021
ISSN	00278424
卷号	118 期号:8
英文摘要	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. All rights reserved.
英文关键词	Mesosiderite; Niobium-92; P-process nucleosynthesis; Short-lived radionuclide; Zr isotopes
语种	英语
scopus关键词	isotope; lead; niobium; niobium 92; niobium 93; radioisotope; short lived radionuclide; titanium dioxide; unclassified drug; uranium; zirconium; zirconium 90; zirconium 92; Article; astronomy; chemical composition; concentration (parameter); core collapse supernova; cosmochronometry; cosmological phenomena; crystallization; decay; evolution; galactic chemical evolution; half life time; limit of detection; measurement; measurement precision; mesosiderite; metamorphosis; p process nucleosynthesis; petrology; physical phenomena; priority journal; reaction temperature; type Ia supernova; uncertainty
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180550
作者单位	Institute of Geochemistry and Petrology, ETH Zürich, Zürich, 8092, Switzerland; Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Tokyo, 152-8551, Japan; Macquarie GeoAnalytical, Department of Earth and Environmental Sciences, Macquarie University, Sydney, NSW 2109, Australia; Antarctic Meteorite Research Center, National Institute of Polar Research, Tokyo, 190-8518, Japan; Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Eötvös Loránd Research Network (ELKH), Budapest, 1121, Hungary; Institute of Physics, ELTE Eötvös Loránd University, Budapest, 1117, Hungary; Monash Centre for Astrophysics, School of Physics and Astronomy, Monash UniversityVIC 3800, Australia
推荐引用方式 GB/T 7714	Haba M.K.,Lai Y.-J.,Wotzlaw J.-F.,et al. Precise initial abundance of Niobium-92 in the Solar System and implications for p-process nucleosynthesis[J],2021,118(8).
APA	Haba M.K.,Lai Y.-J.,Wotzlaw J.-F.,Yamaguchi A.,Lugaro M.,&Schönbächler M..(2021).Precise initial abundance of Niobium-92 in the Solar System and implications for p-process nucleosynthesis.Proceedings of the National Academy of Sciences of the United States of America,118(8).
MLA	Haba M.K.,et al."Precise initial abundance of Niobium-92 in the Solar System and implications for p-process nucleosynthesis".Proceedings of the National Academy of Sciences of the United States of America 118.8(2021).