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There are a total of 7 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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Instellar grains within interstellar grains
Author(s): Bernatowicz, Thomas J.; Amari, Sachiko; Zinner, Ernst K.; Lewis, Roy S.
Abstract: The discovery of crystals of titanium carbide in an interstellar graphite spherule is reported. The new species is particularly interesting in that it came in a protective wrapping (the graphite spherule) which eliminated ...
NASA Center: NASA (non Center Specific)
Publication Year: 1991
Added to NTRS: 2008-05-31
Accession Number: 91N19998; Document ID: 19910010685
Large Ca-48 anomalies are associated with Ti-50 anomalies in Murchison and Murray hibonites
Author(s): Zinner, Ernst K.; Fahey, Albert J.; Mckeegan, Kevin D.; Goswami, Jitendra N.; Ireland, Trevor R.
Abstract: Ion microprobe measurements of the Ca isotopic compositions of eight individual hibonite grains from the Ca chondrites Murray and Murchison are reported. Large Ca-48 anomalies two orders of magnitude larger than those ...
NASA Center: NASA (non Center Specific)
Publication Year: 1986
Added to NTRS: 2004-11-03
Accession Number: 87A27693; Document ID: 19870040419
Interstellar grains within interstellar grains
Author(s): Bernatowicz, Thomas J.; Amari, Sachiko; Zinner, Ernst K.; Lewis, Roy S.
Abstract: Five interstellar graphite spherules extracted from the Murchison carbonaceous meteorite are studied. The isotopic and elemental compositions of individual particles are investigated with the help of an ion microprobe, and ...
NASA Center: NASA (non Center Specific)
Publication Year: 1991
Added to NTRS: 2004-11-03
Accession Number: 91A38647; Document ID: 19910054024
Isotopically anomalous Ti in presolar SiC from the Murchison meteorite
Author(s): Ireland, Trevor R.; Zinner, Ernst K.; Amari, Sachiko
Abstract: No Abstract Available
NASA Center: NASA (non Center Specific)
Publication Year: 1991
Added to NTRS: 2004-11-03
Accession Number: 91A47049; Document ID: 19910062426
Evidence for distillation in the formation of HAL and related hibonite inclusions
Author(s): Ireland, Trevor R.; Zinner, Ernst K.; Fahey, Albert J.; Esat, Tezer M.
Abstract: New Ca- and Ti-isotopic analyses of DH-H1, 7-404, and 7-971, and Mg-isotopic analyses on DH-H1 and 7-404 are reported. O-isotopic analyses of HAL, 7-404, 7-971, and a variety of other refractory inclusions from Murchison ...
NASA Center: Johnson Space Center
Publication Year: 1992
Added to NTRS: 2004-11-03
Accession Number: 92A44723; Document ID: 19920062099
Microdistributions of Mg isotopes and REE abundances in a Type A calcium-aluminum-rich inclusion from Efremovka
Author(s): Fahey, Albert J.; Zinner, Ernst K.; Crozaz, Ghislaine; Kornacki, Alan S.
Abstract: No Abstract Available
NASA Center: NASA (non Center Specific)
Publication Year: 1987
Added to NTRS: 2004-11-03
Accession Number: 88A26445; Document ID: 19880039218
Correlated study of initial Sr-87/Sr-86 and Al-Mg isotopic systematics and petrologic properties in a suite of refractory inclusions from the Allende meteorite
Author(s): Podosek, Frank A.; Zinner, Ernst K.; Lundberg, Laura L.; Brannon, Joyce C.; Macpherson, Glenn J., et al.
Abstract: The abundance and the distribution of Al-26, and the initial Sr-87/Sr-86 ratios were determined in a suite of six coarse-grained Ca-Al-rich inclusions from the Allende meteorite, using, respectively, petrographic and ...
NASA Center: NASA (non Center Specific)
Publication Year: 1991
Added to NTRS: 2004-11-03
Accession Number: 91A34690; Document ID: 19910050067
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