Solar flare irradiation records in Antarctic meteorites

The observation of tracks from solar flare heavy nuclei in Antarctic meteorite samples is reported. In an analysis of nuclear track densities in eight L and H chondrites of low metamorphic grade, it was found that two interior specimens of sample 77216, an L-3 chondrite, contain olivine grains with...

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Main Author: Goswami, J. N.
Format: Other/Unknown Material
Language:unknown
Published: 1981
Subjects:
91
Antarctic
Antarc*
Online Access:http://ntrs.nasa.gov/search.jsp?R=19810063258
id ftnasantrs:oai:casi.ntrs.nasa.gov:19810063258
record_format openpolar
spelling ftnasantrs:oai:casi.ntrs.nasa.gov:19810063258 2023-05-15T13:46:48+02:00 Solar flare irradiation records in Antarctic meteorites Goswami, J. N. Unclassified, Unlimited, Publicly available Sep 10, 1981 http://ntrs.nasa.gov/search.jsp?R=19810063258 unknown http://ntrs.nasa.gov/search.jsp?R=19810063258 Accession ID: 81A47662 Copyright Other Sources 91 Nature; 293; Sept. 10 1981 ftnasantrs 2012-02-15T14:43:49Z The observation of tracks from solar flare heavy nuclei in Antarctic meteorite samples is reported. In an analysis of nuclear track densities in eight L and H chondrites of low metamorphic grade, it was found that two interior specimens of sample 77216, an L-3 chondrite, contain olivine grains with track densities much higher than the average track densities, indicating precompaction irradiation by solar flares in different shielding conditions. Preliminary data from mass spectroscopic analyses show a large excess of noble gases, with a Ne-20/Ne-22 ratio of greater than or equal to 10, indicating the presence of solar-type noble gas. Results of track density measurements in the other Antarctic meteorites range from 10,000 to 4,000,000/sq cm, which is within the range observed in non-Antarctic L-group meteorites Other/Unknown Material Antarc* Antarctic NASA Technical Reports Server (NTRS) Antarctic
institution Open Polar
collection NASA Technical Reports Server (NTRS)
op_collection_id ftnasantrs
language unknown
topic 91
spellingShingle 91
Goswami, J. N.
Solar flare irradiation records in Antarctic meteorites
topic_facet 91
description The observation of tracks from solar flare heavy nuclei in Antarctic meteorite samples is reported. In an analysis of nuclear track densities in eight L and H chondrites of low metamorphic grade, it was found that two interior specimens of sample 77216, an L-3 chondrite, contain olivine grains with track densities much higher than the average track densities, indicating precompaction irradiation by solar flares in different shielding conditions. Preliminary data from mass spectroscopic analyses show a large excess of noble gases, with a Ne-20/Ne-22 ratio of greater than or equal to 10, indicating the presence of solar-type noble gas. Results of track density measurements in the other Antarctic meteorites range from 10,000 to 4,000,000/sq cm, which is within the range observed in non-Antarctic L-group meteorites
format Other/Unknown Material
author Goswami, J. N.
author_facet Goswami, J. N.
author_sort Goswami, J. N.
title Solar flare irradiation records in Antarctic meteorites
title_short Solar flare irradiation records in Antarctic meteorites
title_full Solar flare irradiation records in Antarctic meteorites
title_fullStr Solar flare irradiation records in Antarctic meteorites
title_full_unstemmed Solar flare irradiation records in Antarctic meteorites
title_sort solar flare irradiation records in antarctic meteorites
publishDate 1981
url http://ntrs.nasa.gov/search.jsp?R=19810063258
op_coverage Unclassified, Unlimited, Publicly available
geographic Antarctic
geographic_facet Antarctic
genre Antarc*
Antarctic
genre_facet Antarc*
Antarctic
op_source Other Sources
op_relation http://ntrs.nasa.gov/search.jsp?R=19810063258
Accession ID: 81A47662
op_rights Copyright
_version_ 1766245228051693568

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