S-process krypton of variable isotopic composition in the Murchison meteorite

U. Ott, Friedrich Begemann, Jongmann Yang, Samuel Epstein

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Current theories on the origin of the chemical elements explain the abundance of medium-heavy and heavy nuclides to he due to the capture by pre-existing lighter nuclides of free neutrons on either a slow timescale (s-process) or a rapid timescale (r-process)1-3. Experimental evidence in support of these theories comes from the analysis of carbonaceous chondrites. In acid-resistant residues of these meteorites a kind of xenon has been found, the isotopic composition of which matches almost perfectly that predicted for s-process xenon4,5. We report data that allow us, for the first time, to derive with reasonable precision the full isotopic spectrum of s-process krypton as well. We show that this s-Kr in a residue from Murchison meteorite did not originate in one single s-process but rather is a mixture of contributions from stellar environments where the density of free neutrons was not the same. The astrophysical conditions under which this krypton has been produced were distinct from those that have been invoked to explain the Solar System s-process abundance. Similar to the 13C-rich carbon component in an aliquot of the same residue6, the s-process Kr from different astrophysical sites has retained its identity during the accumulation and subsequent history of the meteorite.

Original languageEnglish
Pages (from-to)700-702
Number of pages3
JournalNature
Volume332
Issue number6166
Publication statusPublished - 1988

Fingerprint

Meteoroids
Krypton
Neutrons
Xenon
Solar System
Carbon
Acids

ASJC Scopus subject areas

  • General

Cite this

Ott, U., Begemann, F., Yang, J., & Epstein, S. (1988). S-process krypton of variable isotopic composition in the Murchison meteorite. Nature, 332(6166), 700-702.

S-process krypton of variable isotopic composition in the Murchison meteorite. / Ott, U.; Begemann, Friedrich; Yang, Jongmann; Epstein, Samuel.

In: Nature, Vol. 332, No. 6166, 1988, p. 700-702.

Research output: Contribution to journalArticle

Ott, U, Begemann, F, Yang, J & Epstein, S 1988, 'S-process krypton of variable isotopic composition in the Murchison meteorite', Nature, vol. 332, no. 6166, pp. 700-702.
Ott U, Begemann F, Yang J, Epstein S. S-process krypton of variable isotopic composition in the Murchison meteorite. Nature. 1988;332(6166):700-702.
Ott, U. ; Begemann, Friedrich ; Yang, Jongmann ; Epstein, Samuel. / S-process krypton of variable isotopic composition in the Murchison meteorite. In: Nature. 1988 ; Vol. 332, No. 6166. pp. 700-702.
@article{8a1e0071442f4e3992d6bde661b85b99,
title = "S-process krypton of variable isotopic composition in the Murchison meteorite",
abstract = "Current theories on the origin of the chemical elements explain the abundance of medium-heavy and heavy nuclides to he due to the capture by pre-existing lighter nuclides of free neutrons on either a slow timescale (s-process) or a rapid timescale (r-process)1-3. Experimental evidence in support of these theories comes from the analysis of carbonaceous chondrites. In acid-resistant residues of these meteorites a kind of xenon has been found, the isotopic composition of which matches almost perfectly that predicted for s-process xenon4,5. We report data that allow us, for the first time, to derive with reasonable precision the full isotopic spectrum of s-process krypton as well. We show that this s-Kr in a residue from Murchison meteorite did not originate in one single s-process but rather is a mixture of contributions from stellar environments where the density of free neutrons was not the same. The astrophysical conditions under which this krypton has been produced were distinct from those that have been invoked to explain the Solar System s-process abundance. Similar to the 13C-rich carbon component in an aliquot of the same residue6, the s-process Kr from different astrophysical sites has retained its identity during the accumulation and subsequent history of the meteorite.",
author = "U. Ott and Friedrich Begemann and Jongmann Yang and Samuel Epstein",
year = "1988",
language = "English",
volume = "332",
pages = "700--702",
journal = "Nature",
issn = "0028-0836",
publisher = "Nature Publishing Group",
number = "6166",

}

TY - JOUR

T1 - S-process krypton of variable isotopic composition in the Murchison meteorite

AU - Ott, U.

AU - Begemann, Friedrich

AU - Yang, Jongmann

AU - Epstein, Samuel

PY - 1988

Y1 - 1988

N2 - Current theories on the origin of the chemical elements explain the abundance of medium-heavy and heavy nuclides to he due to the capture by pre-existing lighter nuclides of free neutrons on either a slow timescale (s-process) or a rapid timescale (r-process)1-3. Experimental evidence in support of these theories comes from the analysis of carbonaceous chondrites. In acid-resistant residues of these meteorites a kind of xenon has been found, the isotopic composition of which matches almost perfectly that predicted for s-process xenon4,5. We report data that allow us, for the first time, to derive with reasonable precision the full isotopic spectrum of s-process krypton as well. We show that this s-Kr in a residue from Murchison meteorite did not originate in one single s-process but rather is a mixture of contributions from stellar environments where the density of free neutrons was not the same. The astrophysical conditions under which this krypton has been produced were distinct from those that have been invoked to explain the Solar System s-process abundance. Similar to the 13C-rich carbon component in an aliquot of the same residue6, the s-process Kr from different astrophysical sites has retained its identity during the accumulation and subsequent history of the meteorite.

AB - Current theories on the origin of the chemical elements explain the abundance of medium-heavy and heavy nuclides to he due to the capture by pre-existing lighter nuclides of free neutrons on either a slow timescale (s-process) or a rapid timescale (r-process)1-3. Experimental evidence in support of these theories comes from the analysis of carbonaceous chondrites. In acid-resistant residues of these meteorites a kind of xenon has been found, the isotopic composition of which matches almost perfectly that predicted for s-process xenon4,5. We report data that allow us, for the first time, to derive with reasonable precision the full isotopic spectrum of s-process krypton as well. We show that this s-Kr in a residue from Murchison meteorite did not originate in one single s-process but rather is a mixture of contributions from stellar environments where the density of free neutrons was not the same. The astrophysical conditions under which this krypton has been produced were distinct from those that have been invoked to explain the Solar System s-process abundance. Similar to the 13C-rich carbon component in an aliquot of the same residue6, the s-process Kr from different astrophysical sites has retained its identity during the accumulation and subsequent history of the meteorite.

UR - http://www.scopus.com/inward/record.url?scp=0024293742&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0024293742&partnerID=8YFLogxK

M3 - Article

VL - 332

SP - 700

EP - 702

JO - Nature

JF - Nature

SN - 0028-0836

IS - 6166

ER -