History of trace gases in presolar diamonds inferred from ion-implantation experiments

A. P. Koscheev, M. D. Gromov, R. K. Mohapatra and U. Ott ()
Additional contact information
A. P. Koscheev: Karpov Institute of Physical Chemistry
M. D. Gromov: Karpov Institute of Physical Chemistry
R. K. Mohapatra: Max-Planck-Institut für Chemie (Otto-Hahn-Institut)
U. Ott: Max-Planck-Institut für Chemie (Otto-Hahn-Institut)

Nature, 2001, vol. 412, issue 6847, 615-617

Abstract: Abstract Diamond grains are the most abundant presolar grains found in primitive meteorites1,2,3. They formed before the Solar System, and therefore provide a record of nuclear and chemical processes in stars and in the interstellar medium1,2,3. Their origins are inferred from the unusual isotopic compositions of trace elements—mainly xenon1,2,3,4—which suggest that they came from supernovae. But the exact nature of the sources has been enigmatic, as has the method by which noble gases were incorporated into the grains. One observation is that different isotopic components are released at different temperatures when the grains are heated, and it has been suggested that these components have different origins. Here we report results of a laboratory study that shows that ion implantation (previously suggested on other grounds5,6) is a viable mechanism for trapping noble gases. Moreover, we find that ion implantation of a single isotopic composition can produce both low- and high-temperature release peaks from the same grains. We conclude that both isotopically normal and anomalous gases may have been implanted by multiple events separated in space and/or time, with thermal processing producing an apparent enrichment of the anomalous component in the high-temperature release peak. The previous assumption that the low- and high-temperature components were not correlated may therefore have led to an overestimate of the abundance of anomalous argon and krypton, while obscuring an enhancement of the light—in addition to the heavy—krypton isotopes.

Date: 2001
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/35088009 Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:nature:v:412:y:2001:i:6847:d:10.1038_35088009

Ordering information: This journal article can be ordered from
https://www.nature.com/

DOI: 10.1038/35088009

Access Statistics for this article

Nature is currently edited by Magdalena Skipper

More articles in Nature from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().