Discovery of s-process barium in the Murchison meteorite

U. Ott, F. Begemann

Research output: Contribution to journalArticle

87 Citations (Scopus)

Abstract

Barium strongly enriched in its s-process-produced isotopes has been detected in a residue of Murchison meteorite. Relative to 130,132Ba of p-process origin the s-component is enriched by almost 50%. The inferred isotopic composition of pure excess s-Ba in Murchison is distinct from average solar system s-Ba; the neutron exposure for the production of excess s-Ba in Murchison of τ0 = 0.17 mb-1 was lower by more than 30%. In the residue s-Ba is enriched over s-Xe about 1800-fold. Possibly, the enhancement is governed by the respective ionization energies which suggests implantation of s-process ions into preexisting host phases. Any HL-Ba which possibly accompanies HL-Xe in this residue can only be enhanced by

Original languageEnglish
JournalAstrophysical Journal
Volume353
Issue number2 PART II
Publication statusPublished - 1990

Fingerprint

Murchison meteorite
barium
solar system
ionization
isotopic composition
isotope
fold
ion
energy
implantation
isotopes
neutrons
augmentation
exposure
ions

Keywords

  • Interstellar: grains
  • Meteors and meteorites
  • Nucleosynthesis

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Space and Planetary Science

Cite this

Discovery of s-process barium in the Murchison meteorite. / Ott, U.; Begemann, F.

In: Astrophysical Journal, Vol. 353, No. 2 PART II, 1990.

Research output: Contribution to journalArticle

Ott, U. ; Begemann, F. / Discovery of s-process barium in the Murchison meteorite. In: Astrophysical Journal. 1990 ; Vol. 353, No. 2 PART II.
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