Cosmogenic C-14 in Antarctic and non-Antarctic meteorites and lunar samples
We were able to develop measurements of C-14 in meteorites as a useful tool for estimates of terrestrial age. Prior to this accomplishment, only a few measurements of C-14 terrestrial ages had been made. The sample sizes were larger, and there had been no systematic study of the various parameters a...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19940025400 2023-05-15T14:06:37+02:00 Cosmogenic C-14 in Antarctic and non-Antarctic meteorites and lunar samples Donahue, D. J. Jull, A. J. Timothy Burr, G. S. Unclassified, Unlimited, Publicly available JAN 1, 1994 application/pdf http://hdl.handle.net/2060/19940025400 unknown Document ID: 19940025400 Accession ID: 94N29905 http://hdl.handle.net/2060/19940025400 No Copyright CASI ASTROPHYSICS NASA-CR-195795 NAS 1.26:195795 1994 ftnasantrs 2019-07-21T03:36:00Z We were able to develop measurements of C-14 in meteorites as a useful tool for estimates of terrestrial age. Prior to this accomplishment, only a few measurements of C-14 terrestrial ages had been made. The sample sizes were larger, and there had been no systematic study of the various parameters affecting production of C-14, such as depth dependence, and the production cross sections for C-14 from spallation amounted to a few data points. Presently, C-14 ages are an accepted terrestrial age estimate in the meteorite community, whereas before this work the few data available were difficult to interpret. We have obtained terrestrial ages not only on groups of meteorites from different geographic areas but also information on unique meteorites from particularly interesting groups, such as meteorites originating from the Moon, or SNC meteorites, which many researchers believe are derived from Mars. Other/Unknown Material Antarc* Antarctic NASA Technical Reports Server (NTRS) Antarctic |
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NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
ASTROPHYSICS |
spellingShingle |
ASTROPHYSICS Donahue, D. J. Jull, A. J. Timothy Burr, G. S. Cosmogenic C-14 in Antarctic and non-Antarctic meteorites and lunar samples |
topic_facet |
ASTROPHYSICS |
description |
We were able to develop measurements of C-14 in meteorites as a useful tool for estimates of terrestrial age. Prior to this accomplishment, only a few measurements of C-14 terrestrial ages had been made. The sample sizes were larger, and there had been no systematic study of the various parameters affecting production of C-14, such as depth dependence, and the production cross sections for C-14 from spallation amounted to a few data points. Presently, C-14 ages are an accepted terrestrial age estimate in the meteorite community, whereas before this work the few data available were difficult to interpret. We have obtained terrestrial ages not only on groups of meteorites from different geographic areas but also information on unique meteorites from particularly interesting groups, such as meteorites originating from the Moon, or SNC meteorites, which many researchers believe are derived from Mars. |
format |
Other/Unknown Material |
author |
Donahue, D. J. Jull, A. J. Timothy Burr, G. S. |
author_facet |
Donahue, D. J. Jull, A. J. Timothy Burr, G. S. |
author_sort |
Donahue, D. J. |
title |
Cosmogenic C-14 in Antarctic and non-Antarctic meteorites and lunar samples |
title_short |
Cosmogenic C-14 in Antarctic and non-Antarctic meteorites and lunar samples |
title_full |
Cosmogenic C-14 in Antarctic and non-Antarctic meteorites and lunar samples |
title_fullStr |
Cosmogenic C-14 in Antarctic and non-Antarctic meteorites and lunar samples |
title_full_unstemmed |
Cosmogenic C-14 in Antarctic and non-Antarctic meteorites and lunar samples |
title_sort |
cosmogenic c-14 in antarctic and non-antarctic meteorites and lunar samples |
publishDate |
1994 |
url |
http://hdl.handle.net/2060/19940025400 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
CASI |
op_relation |
Document ID: 19940025400 Accession ID: 94N29905 http://hdl.handle.net/2060/19940025400 |
op_rights |
No Copyright |
_version_ |
1766278604547686400 |