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  • 1985-1989  (2)
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  • 1
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    Unknown
    A spectacular nitrogen isotope anomaly in Bencubbin (1985)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Results of isotopic measurements on an unusual stony-iron meteorite named Bencubbin, which was found in Western Australia in 1930, are reported. Nitrogen from both the metallic and stony parts of the Bencubbin meteorite was analyzed, and in both materials large excesses of (15)N were found, resulting in values of the (14)N/(15)N abundance ratios as low as 137. That is, (15)N is enriched in Bencubbin by about a factor of two relative to terrestrial nitrogen. This is the largest (15)N enrichment of any known natural material. The effect is so large that chemical processes are probably inadequate to account for it. Nuclear processes which may be responsible for the anomalous isotope abundance are discussed.
    Keywords: ASTROPHYSICS
    Type: Lunar and Planetary Inst. 16th Lunar and Planetary Sci. Conf.; p 71-73
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    A striking nitrogen isotope anomaly in the Bencubbin and Weatherford meteorites (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: The stony-iron meteorites Bencubbin and Weatherford contain nitrogen with a ratio of nitrogen-15 to nitrogen-14 larger than normal by as much as a factor of 2. The excess nitrogen-15 may be due either to a nucleosynthetic origin or to extreme isotopic fractionation. In the former case, it may reflect failure to homogenize nitrogen-15 produced in nova explosions. In the latter case, it may reflect chemical processing at temperatures below 40 K in a presolar molecular cloud.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Science (ISSN 0036-8075); 230; 935-937
    Format: text
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    NASA TECHNICAL REPORTS
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