The initial abundance and distribution of 92Nb in the Solar System
Niobium-92 is an extinct proton-rich nuclide, which decays to 92Zr with a half-life of 37 Ma. This radionuclide potentially offers a unique opportunity to determine the timescales of early Solar System processes and the site(s) of nucleosynthesis for p-nuclei, once its initial abundance and distribu...
Ausführliche Beschreibung
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| Autor*in: |
Iizuka, Tsuyoshi [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2016 |
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| Schlagwörter: |
Solar and Stellar Astrophysics |
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| Systematik: |
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| Übergeordnetes Werk: |
Enthalten in: Earth & planetary science letters - Amsterdam [u.a.] : Elsevier, 1966, (2016) |
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| Übergeordnetes Werk: |
year:2016 |
| Links: |
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| DOI / URN: |
10.1016/j.epsl.2016.02.005 |
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| 245 | 1 | 4 | |a The initial abundance and distribution of 92Nb in the Solar System |
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| 520 | |a Niobium-92 is an extinct proton-rich nuclide, which decays to 92Zr with a half-life of 37 Ma. This radionuclide potentially offers a unique opportunity to determine the timescales of early Solar System processes and the site(s) of nucleosynthesis for p-nuclei, once its initial abundance and distribution in the Solar System are well established. Here we present internal Nb-Zr isochrons for three basaltic achondrites with known U-Pb ages: the angrite NWA 4590, the eucrite Agoult, and the ungrouped achondrite Ibitira. Our results show that the relative Nb-Zr isochron ages of the three meteorites are consistent with the time intervals obtained from the Pb-Pb chronometer for pyroxene and plagioclase, indicating that 92Nb was homogeneously distributed among their source regions. The Nb-Zr and Pb-Pb data for NWA 4590 yield the most reliable and precise reference point for anchoring the Nb-Zr chronometer to the absolute timescale: an initial 92Nb/93Nb ratio of (1.4 \pm 0.5) \times 10^{-5} at 4557.93 \pm 0.36 Ma, which corresponds to a 92Nb/93Nb ratio of (1.7 \pm 0.6) \times 10^{-5} at the time of the Solar System formation. On the basis of this new initial ratio, we demonstrate the capability of the Nb-Zr chronometer to date early Solar System objects including troilite and rutile, such as iron and stony-iron meteorites. Furthermore, we estimate a nucleosynthetic production ratio of 92Nb to the p-nucleus 92Mo between 0.0015 and 0.035. This production ratio, together with the solar abundances of other p-nuclei with similar masses, can be best explained if these light p-nuclei were primarily synthesized by photodisintegration reactions in Type Ia supernovae. | ||
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| 700 | 1 | |a Schönbächler, Maria |4 oth | |
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10.1016/j.epsl.2016.02.005 doi PQ20160430 (DE-627)OLC1973750198 (DE-599)GBVOLC1973750198 (PRQ)a911-c29e8260eb97f526b17d2432dc002a1a0a4de8c21218a4ef295af64a4c560e4f0 (KEY)0055337920160000000000000000initialabundanceanddistributionof92nbinthesolarsys DE-627 ger DE-627 rakwb eng 550 DNB TE 1000 AVZ rvk TE AVZ rvk 38.35 bkl 39.29 bkl Iizuka, Tsuyoshi verfasserin aut The initial abundance and distribution of 92Nb in the Solar System 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Niobium-92 is an extinct proton-rich nuclide, which decays to 92Zr with a half-life of 37 Ma. This radionuclide potentially offers a unique opportunity to determine the timescales of early Solar System processes and the site(s) of nucleosynthesis for p-nuclei, once its initial abundance and distribution in the Solar System are well established. Here we present internal Nb-Zr isochrons for three basaltic achondrites with known U-Pb ages: the angrite NWA 4590, the eucrite Agoult, and the ungrouped achondrite Ibitira. Our results show that the relative Nb-Zr isochron ages of the three meteorites are consistent with the time intervals obtained from the Pb-Pb chronometer for pyroxene and plagioclase, indicating that 92Nb was homogeneously distributed among their source regions. The Nb-Zr and Pb-Pb data for NWA 4590 yield the most reliable and precise reference point for anchoring the Nb-Zr chronometer to the absolute timescale: an initial 92Nb/93Nb ratio of (1.4 \pm 0.5) \times 10^{-5} at 4557.93 \pm 0.36 Ma, which corresponds to a 92Nb/93Nb ratio of (1.7 \pm 0.6) \times 10^{-5} at the time of the Solar System formation. On the basis of this new initial ratio, we demonstrate the capability of the Nb-Zr chronometer to date early Solar System objects including troilite and rutile, such as iron and stony-iron meteorites. Furthermore, we estimate a nucleosynthetic production ratio of 92Nb to the p-nucleus 92Mo between 0.0015 and 0.035. This production ratio, together with the solar abundances of other p-nuclei with similar masses, can be best explained if these light p-nuclei were primarily synthesized by photodisintegration reactions in Type Ia supernovae. Solar and Stellar Astrophysics Earth and Planetary Astrophysics Astrophysics Lai, Yi-Jen oth Akram, Waheed oth Amelin, Yuri oth Schönbächler, Maria oth Enthalten in Earth & planetary science letters Amsterdam [u.a.] : Elsevier, 1966 (2016) (DE-627)129882534 (DE-600)300203-2 (DE-576)015178501 0012-821X nnns year:2016 http://dx.doi.org/10.1016/j.epsl.2016.02.005 Volltext http://arxiv.org/abs/1602.00966 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OLC-AST SSG-OPC-GGO SSG-OPC-GEO SSG-OPC-AST GBV_ILN_21 GBV_ILN_70 GBV_ILN_2279 GBV_ILN_4323 TE 1000 TE 38.35 AVZ 39.29 AVZ AR 2016 |
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10.1016/j.epsl.2016.02.005 doi PQ20160430 (DE-627)OLC1973750198 (DE-599)GBVOLC1973750198 (PRQ)a911-c29e8260eb97f526b17d2432dc002a1a0a4de8c21218a4ef295af64a4c560e4f0 (KEY)0055337920160000000000000000initialabundanceanddistributionof92nbinthesolarsys DE-627 ger DE-627 rakwb eng 550 DNB TE 1000 AVZ rvk TE AVZ rvk 38.35 bkl 39.29 bkl Iizuka, Tsuyoshi verfasserin aut The initial abundance and distribution of 92Nb in the Solar System 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Niobium-92 is an extinct proton-rich nuclide, which decays to 92Zr with a half-life of 37 Ma. This radionuclide potentially offers a unique opportunity to determine the timescales of early Solar System processes and the site(s) of nucleosynthesis for p-nuclei, once its initial abundance and distribution in the Solar System are well established. Here we present internal Nb-Zr isochrons for three basaltic achondrites with known U-Pb ages: the angrite NWA 4590, the eucrite Agoult, and the ungrouped achondrite Ibitira. Our results show that the relative Nb-Zr isochron ages of the three meteorites are consistent with the time intervals obtained from the Pb-Pb chronometer for pyroxene and plagioclase, indicating that 92Nb was homogeneously distributed among their source regions. The Nb-Zr and Pb-Pb data for NWA 4590 yield the most reliable and precise reference point for anchoring the Nb-Zr chronometer to the absolute timescale: an initial 92Nb/93Nb ratio of (1.4 \pm 0.5) \times 10^{-5} at 4557.93 \pm 0.36 Ma, which corresponds to a 92Nb/93Nb ratio of (1.7 \pm 0.6) \times 10^{-5} at the time of the Solar System formation. On the basis of this new initial ratio, we demonstrate the capability of the Nb-Zr chronometer to date early Solar System objects including troilite and rutile, such as iron and stony-iron meteorites. Furthermore, we estimate a nucleosynthetic production ratio of 92Nb to the p-nucleus 92Mo between 0.0015 and 0.035. This production ratio, together with the solar abundances of other p-nuclei with similar masses, can be best explained if these light p-nuclei were primarily synthesized by photodisintegration reactions in Type Ia supernovae. Solar and Stellar Astrophysics Earth and Planetary Astrophysics Astrophysics Lai, Yi-Jen oth Akram, Waheed oth Amelin, Yuri oth Schönbächler, Maria oth Enthalten in Earth & planetary science letters Amsterdam [u.a.] : Elsevier, 1966 (2016) (DE-627)129882534 (DE-600)300203-2 (DE-576)015178501 0012-821X nnns year:2016 http://dx.doi.org/10.1016/j.epsl.2016.02.005 Volltext http://arxiv.org/abs/1602.00966 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OLC-AST SSG-OPC-GGO SSG-OPC-GEO SSG-OPC-AST GBV_ILN_21 GBV_ILN_70 GBV_ILN_2279 GBV_ILN_4323 TE 1000 TE 38.35 AVZ 39.29 AVZ AR 2016 |
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10.1016/j.epsl.2016.02.005 doi PQ20160430 (DE-627)OLC1973750198 (DE-599)GBVOLC1973750198 (PRQ)a911-c29e8260eb97f526b17d2432dc002a1a0a4de8c21218a4ef295af64a4c560e4f0 (KEY)0055337920160000000000000000initialabundanceanddistributionof92nbinthesolarsys DE-627 ger DE-627 rakwb eng 550 DNB TE 1000 AVZ rvk TE AVZ rvk 38.35 bkl 39.29 bkl Iizuka, Tsuyoshi verfasserin aut The initial abundance and distribution of 92Nb in the Solar System 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Niobium-92 is an extinct proton-rich nuclide, which decays to 92Zr with a half-life of 37 Ma. This radionuclide potentially offers a unique opportunity to determine the timescales of early Solar System processes and the site(s) of nucleosynthesis for p-nuclei, once its initial abundance and distribution in the Solar System are well established. Here we present internal Nb-Zr isochrons for three basaltic achondrites with known U-Pb ages: the angrite NWA 4590, the eucrite Agoult, and the ungrouped achondrite Ibitira. Our results show that the relative Nb-Zr isochron ages of the three meteorites are consistent with the time intervals obtained from the Pb-Pb chronometer for pyroxene and plagioclase, indicating that 92Nb was homogeneously distributed among their source regions. The Nb-Zr and Pb-Pb data for NWA 4590 yield the most reliable and precise reference point for anchoring the Nb-Zr chronometer to the absolute timescale: an initial 92Nb/93Nb ratio of (1.4 \pm 0.5) \times 10^{-5} at 4557.93 \pm 0.36 Ma, which corresponds to a 92Nb/93Nb ratio of (1.7 \pm 0.6) \times 10^{-5} at the time of the Solar System formation. On the basis of this new initial ratio, we demonstrate the capability of the Nb-Zr chronometer to date early Solar System objects including troilite and rutile, such as iron and stony-iron meteorites. Furthermore, we estimate a nucleosynthetic production ratio of 92Nb to the p-nucleus 92Mo between 0.0015 and 0.035. This production ratio, together with the solar abundances of other p-nuclei with similar masses, can be best explained if these light p-nuclei were primarily synthesized by photodisintegration reactions in Type Ia supernovae. Solar and Stellar Astrophysics Earth and Planetary Astrophysics Astrophysics Lai, Yi-Jen oth Akram, Waheed oth Amelin, Yuri oth Schönbächler, Maria oth Enthalten in Earth & planetary science letters Amsterdam [u.a.] : Elsevier, 1966 (2016) (DE-627)129882534 (DE-600)300203-2 (DE-576)015178501 0012-821X nnns year:2016 http://dx.doi.org/10.1016/j.epsl.2016.02.005 Volltext http://arxiv.org/abs/1602.00966 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OLC-AST SSG-OPC-GGO SSG-OPC-GEO SSG-OPC-AST GBV_ILN_21 GBV_ILN_70 GBV_ILN_2279 GBV_ILN_4323 TE 1000 TE 38.35 AVZ 39.29 AVZ AR 2016 |
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10.1016/j.epsl.2016.02.005 doi PQ20160430 (DE-627)OLC1973750198 (DE-599)GBVOLC1973750198 (PRQ)a911-c29e8260eb97f526b17d2432dc002a1a0a4de8c21218a4ef295af64a4c560e4f0 (KEY)0055337920160000000000000000initialabundanceanddistributionof92nbinthesolarsys DE-627 ger DE-627 rakwb eng 550 DNB TE 1000 AVZ rvk TE AVZ rvk 38.35 bkl 39.29 bkl Iizuka, Tsuyoshi verfasserin aut The initial abundance and distribution of 92Nb in the Solar System 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Niobium-92 is an extinct proton-rich nuclide, which decays to 92Zr with a half-life of 37 Ma. This radionuclide potentially offers a unique opportunity to determine the timescales of early Solar System processes and the site(s) of nucleosynthesis for p-nuclei, once its initial abundance and distribution in the Solar System are well established. Here we present internal Nb-Zr isochrons for three basaltic achondrites with known U-Pb ages: the angrite NWA 4590, the eucrite Agoult, and the ungrouped achondrite Ibitira. Our results show that the relative Nb-Zr isochron ages of the three meteorites are consistent with the time intervals obtained from the Pb-Pb chronometer for pyroxene and plagioclase, indicating that 92Nb was homogeneously distributed among their source regions. The Nb-Zr and Pb-Pb data for NWA 4590 yield the most reliable and precise reference point for anchoring the Nb-Zr chronometer to the absolute timescale: an initial 92Nb/93Nb ratio of (1.4 \pm 0.5) \times 10^{-5} at 4557.93 \pm 0.36 Ma, which corresponds to a 92Nb/93Nb ratio of (1.7 \pm 0.6) \times 10^{-5} at the time of the Solar System formation. On the basis of this new initial ratio, we demonstrate the capability of the Nb-Zr chronometer to date early Solar System objects including troilite and rutile, such as iron and stony-iron meteorites. Furthermore, we estimate a nucleosynthetic production ratio of 92Nb to the p-nucleus 92Mo between 0.0015 and 0.035. This production ratio, together with the solar abundances of other p-nuclei with similar masses, can be best explained if these light p-nuclei were primarily synthesized by photodisintegration reactions in Type Ia supernovae. Solar and Stellar Astrophysics Earth and Planetary Astrophysics Astrophysics Lai, Yi-Jen oth Akram, Waheed oth Amelin, Yuri oth Schönbächler, Maria oth Enthalten in Earth & planetary science letters Amsterdam [u.a.] : Elsevier, 1966 (2016) (DE-627)129882534 (DE-600)300203-2 (DE-576)015178501 0012-821X nnns year:2016 http://dx.doi.org/10.1016/j.epsl.2016.02.005 Volltext http://arxiv.org/abs/1602.00966 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OLC-AST SSG-OPC-GGO SSG-OPC-GEO SSG-OPC-AST GBV_ILN_21 GBV_ILN_70 GBV_ILN_2279 GBV_ILN_4323 TE 1000 TE 38.35 AVZ 39.29 AVZ AR 2016 |
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10.1016/j.epsl.2016.02.005 doi PQ20160430 (DE-627)OLC1973750198 (DE-599)GBVOLC1973750198 (PRQ)a911-c29e8260eb97f526b17d2432dc002a1a0a4de8c21218a4ef295af64a4c560e4f0 (KEY)0055337920160000000000000000initialabundanceanddistributionof92nbinthesolarsys DE-627 ger DE-627 rakwb eng 550 DNB TE 1000 AVZ rvk TE AVZ rvk 38.35 bkl 39.29 bkl Iizuka, Tsuyoshi verfasserin aut The initial abundance and distribution of 92Nb in the Solar System 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Niobium-92 is an extinct proton-rich nuclide, which decays to 92Zr with a half-life of 37 Ma. This radionuclide potentially offers a unique opportunity to determine the timescales of early Solar System processes and the site(s) of nucleosynthesis for p-nuclei, once its initial abundance and distribution in the Solar System are well established. Here we present internal Nb-Zr isochrons for three basaltic achondrites with known U-Pb ages: the angrite NWA 4590, the eucrite Agoult, and the ungrouped achondrite Ibitira. Our results show that the relative Nb-Zr isochron ages of the three meteorites are consistent with the time intervals obtained from the Pb-Pb chronometer for pyroxene and plagioclase, indicating that 92Nb was homogeneously distributed among their source regions. The Nb-Zr and Pb-Pb data for NWA 4590 yield the most reliable and precise reference point for anchoring the Nb-Zr chronometer to the absolute timescale: an initial 92Nb/93Nb ratio of (1.4 \pm 0.5) \times 10^{-5} at 4557.93 \pm 0.36 Ma, which corresponds to a 92Nb/93Nb ratio of (1.7 \pm 0.6) \times 10^{-5} at the time of the Solar System formation. On the basis of this new initial ratio, we demonstrate the capability of the Nb-Zr chronometer to date early Solar System objects including troilite and rutile, such as iron and stony-iron meteorites. Furthermore, we estimate a nucleosynthetic production ratio of 92Nb to the p-nucleus 92Mo between 0.0015 and 0.035. This production ratio, together with the solar abundances of other p-nuclei with similar masses, can be best explained if these light p-nuclei were primarily synthesized by photodisintegration reactions in Type Ia supernovae. Solar and Stellar Astrophysics Earth and Planetary Astrophysics Astrophysics Lai, Yi-Jen oth Akram, Waheed oth Amelin, Yuri oth Schönbächler, Maria oth Enthalten in Earth & planetary science letters Amsterdam [u.a.] : Elsevier, 1966 (2016) (DE-627)129882534 (DE-600)300203-2 (DE-576)015178501 0012-821X nnns year:2016 http://dx.doi.org/10.1016/j.epsl.2016.02.005 Volltext http://arxiv.org/abs/1602.00966 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OLC-AST SSG-OPC-GGO SSG-OPC-GEO SSG-OPC-AST GBV_ILN_21 GBV_ILN_70 GBV_ILN_2279 GBV_ILN_4323 TE 1000 TE 38.35 AVZ 39.29 AVZ AR 2016 |
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The initial abundance and distribution of 92Nb in the Solar System |
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The initial abundance and distribution of 92Nb in the Solar System |
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initial abundance and distribution of 92nb in the solar system |
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The initial abundance and distribution of 92Nb in the Solar System |
| abstract |
Niobium-92 is an extinct proton-rich nuclide, which decays to 92Zr with a half-life of 37 Ma. This radionuclide potentially offers a unique opportunity to determine the timescales of early Solar System processes and the site(s) of nucleosynthesis for p-nuclei, once its initial abundance and distribution in the Solar System are well established. Here we present internal Nb-Zr isochrons for three basaltic achondrites with known U-Pb ages: the angrite NWA 4590, the eucrite Agoult, and the ungrouped achondrite Ibitira. Our results show that the relative Nb-Zr isochron ages of the three meteorites are consistent with the time intervals obtained from the Pb-Pb chronometer for pyroxene and plagioclase, indicating that 92Nb was homogeneously distributed among their source regions. The Nb-Zr and Pb-Pb data for NWA 4590 yield the most reliable and precise reference point for anchoring the Nb-Zr chronometer to the absolute timescale: an initial 92Nb/93Nb ratio of (1.4 \pm 0.5) \times 10^{-5} at 4557.93 \pm 0.36 Ma, which corresponds to a 92Nb/93Nb ratio of (1.7 \pm 0.6) \times 10^{-5} at the time of the Solar System formation. On the basis of this new initial ratio, we demonstrate the capability of the Nb-Zr chronometer to date early Solar System objects including troilite and rutile, such as iron and stony-iron meteorites. Furthermore, we estimate a nucleosynthetic production ratio of 92Nb to the p-nucleus 92Mo between 0.0015 and 0.035. This production ratio, together with the solar abundances of other p-nuclei with similar masses, can be best explained if these light p-nuclei were primarily synthesized by photodisintegration reactions in Type Ia supernovae. |
| abstractGer |
Niobium-92 is an extinct proton-rich nuclide, which decays to 92Zr with a half-life of 37 Ma. This radionuclide potentially offers a unique opportunity to determine the timescales of early Solar System processes and the site(s) of nucleosynthesis for p-nuclei, once its initial abundance and distribution in the Solar System are well established. Here we present internal Nb-Zr isochrons for three basaltic achondrites with known U-Pb ages: the angrite NWA 4590, the eucrite Agoult, and the ungrouped achondrite Ibitira. Our results show that the relative Nb-Zr isochron ages of the three meteorites are consistent with the time intervals obtained from the Pb-Pb chronometer for pyroxene and plagioclase, indicating that 92Nb was homogeneously distributed among their source regions. The Nb-Zr and Pb-Pb data for NWA 4590 yield the most reliable and precise reference point for anchoring the Nb-Zr chronometer to the absolute timescale: an initial 92Nb/93Nb ratio of (1.4 \pm 0.5) \times 10^{-5} at 4557.93 \pm 0.36 Ma, which corresponds to a 92Nb/93Nb ratio of (1.7 \pm 0.6) \times 10^{-5} at the time of the Solar System formation. On the basis of this new initial ratio, we demonstrate the capability of the Nb-Zr chronometer to date early Solar System objects including troilite and rutile, such as iron and stony-iron meteorites. Furthermore, we estimate a nucleosynthetic production ratio of 92Nb to the p-nucleus 92Mo between 0.0015 and 0.035. This production ratio, together with the solar abundances of other p-nuclei with similar masses, can be best explained if these light p-nuclei were primarily synthesized by photodisintegration reactions in Type Ia supernovae. |
| abstract_unstemmed |
Niobium-92 is an extinct proton-rich nuclide, which decays to 92Zr with a half-life of 37 Ma. This radionuclide potentially offers a unique opportunity to determine the timescales of early Solar System processes and the site(s) of nucleosynthesis for p-nuclei, once its initial abundance and distribution in the Solar System are well established. Here we present internal Nb-Zr isochrons for three basaltic achondrites with known U-Pb ages: the angrite NWA 4590, the eucrite Agoult, and the ungrouped achondrite Ibitira. Our results show that the relative Nb-Zr isochron ages of the three meteorites are consistent with the time intervals obtained from the Pb-Pb chronometer for pyroxene and plagioclase, indicating that 92Nb was homogeneously distributed among their source regions. The Nb-Zr and Pb-Pb data for NWA 4590 yield the most reliable and precise reference point for anchoring the Nb-Zr chronometer to the absolute timescale: an initial 92Nb/93Nb ratio of (1.4 \pm 0.5) \times 10^{-5} at 4557.93 \pm 0.36 Ma, which corresponds to a 92Nb/93Nb ratio of (1.7 \pm 0.6) \times 10^{-5} at the time of the Solar System formation. On the basis of this new initial ratio, we demonstrate the capability of the Nb-Zr chronometer to date early Solar System objects including troilite and rutile, such as iron and stony-iron meteorites. Furthermore, we estimate a nucleosynthetic production ratio of 92Nb to the p-nucleus 92Mo between 0.0015 and 0.035. This production ratio, together with the solar abundances of other p-nuclei with similar masses, can be best explained if these light p-nuclei were primarily synthesized by photodisintegration reactions in Type Ia supernovae. |
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| title_short |
The initial abundance and distribution of 92Nb in the Solar System |
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This radionuclide potentially offers a unique opportunity to determine the timescales of early Solar System processes and the site(s) of nucleosynthesis for p-nuclei, once its initial abundance and distribution in the Solar System are well established. Here we present internal Nb-Zr isochrons for three basaltic achondrites with known U-Pb ages: the angrite NWA 4590, the eucrite Agoult, and the ungrouped achondrite Ibitira. Our results show that the relative Nb-Zr isochron ages of the three meteorites are consistent with the time intervals obtained from the Pb-Pb chronometer for pyroxene and plagioclase, indicating that 92Nb was homogeneously distributed among their source regions. The Nb-Zr and Pb-Pb data for NWA 4590 yield the most reliable and precise reference point for anchoring the Nb-Zr chronometer to the absolute timescale: an initial 92Nb/93Nb ratio of (1.4 \pm 0.5) \times 10^{-5} at 4557.93 \pm 0.36 Ma, which corresponds to a 92Nb/93Nb ratio of (1.7 \pm 0.6) \times 10^{-5} at the time of the Solar System formation. On the basis of this new initial ratio, we demonstrate the capability of the Nb-Zr chronometer to date early Solar System objects including troilite and rutile, such as iron and stony-iron meteorites. Furthermore, we estimate a nucleosynthetic production ratio of 92Nb to the p-nucleus 92Mo between 0.0015 and 0.035. This production ratio, together with the solar abundances of other p-nuclei with similar masses, can be best explained if these light p-nuclei were primarily synthesized by photodisintegration reactions in Type Ia supernovae.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Solar and Stellar Astrophysics</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Earth and Planetary Astrophysics</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Astrophysics</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Lai, Yi-Jen</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Akram, Waheed</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Amelin, Yuri</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Schönbächler, Maria</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Earth & planetary science letters</subfield><subfield code="d">Amsterdam [u.a.] : Elsevier, 1966</subfield><subfield code="g">(2016)</subfield><subfield code="w">(DE-627)129882534</subfield><subfield code="w">(DE-600)300203-2</subfield><subfield code="w">(DE-576)015178501</subfield><subfield code="x">0012-821X</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">year:2016</subfield></datafield><datafield tag="856" ind1="4" ind2="1"><subfield code="u">http://dx.doi.org/10.1016/j.epsl.2016.02.005</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="856" ind1="4" ind2="2"><subfield code="u">http://arxiv.org/abs/1602.00966</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_OLC</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-GEO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-AST</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-GGO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-GEO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-AST</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_21</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_70</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2279</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4323</subfield></datafield><datafield tag="936" ind1="r" ind2="v"><subfield code="a">TE 1000</subfield></datafield><datafield tag="936" ind1="r" ind2="v"><subfield code="a">TE</subfield></datafield><datafield tag="936" ind1="b" ind2="k"><subfield code="a">38.35</subfield><subfield code="q">AVZ</subfield></datafield><datafield tag="936" ind1="b" ind2="k"><subfield code="a">39.29</subfield><subfield code="q">AVZ</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="j">2016</subfield></datafield></record></collection>
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