Zr and Mo isotopes in single presolar graphite grains : a record of stellar nucleosynthesis.

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Thirty-two individual graphite grains from the Murchison meteorite were analyzed for their Mo and/or Zr isotopic compositions by laser ablation resonant ionization mass spectrometry. {sup 96}Zr/{sup 94}Zr ratios range from 0.074 times to 10 times the solar value. Five grains have depletions in {sup 96}Zr, suggestive of the s-process, and two grains have extraordinary enrichments in {sup 96}Zr, suggestive of the r-process. Most graphite grains have close-to-terrestrial Mo isotopic imposition, but five have s-process Mo nucleosynthesis signatures.

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5 p.

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Nicolussi, G. K. February 10, 1998.

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Thirty-two individual graphite grains from the Murchison meteorite were analyzed for their Mo and/or Zr isotopic compositions by laser ablation resonant ionization mass spectrometry. {sup 96}Zr/{sup 94}Zr ratios range from 0.074 times to 10 times the solar value. Five grains have depletions in {sup 96}Zr, suggestive of the s-process, and two grains have extraordinary enrichments in {sup 96}Zr, suggestive of the r-process. Most graphite grains have close-to-terrestrial Mo isotopic imposition, but five have s-process Mo nucleosynthesis signatures.

Physical Description

5 p.

Notes

OSTI as DE00010639

Medium: P; Size: 5 pages

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  • 29th Lunar and Planetary Science Conference, Houston, TX (US), 03/16/1998--03/20/1998

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  • Report No.: ANL/CHM/CP-95617
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 10639
  • Archival Resource Key: ark:/67531/metadc619842

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  • February 10, 1998

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  • June 16, 2015, 7:43 a.m.

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  • April 11, 2017, 12:43 p.m.

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Nicolussi, G. K. Zr and Mo isotopes in single presolar graphite grains : a record of stellar nucleosynthesis., article, February 10, 1998; Illinois. (digital.library.unt.edu/ark:/67531/metadc619842/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.