Other
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996m%26ps...31..171b&link_type=abstract
Meteoritics and Planetary Science, Vol. 31, p. 171-176 (1996)
Other
2
Scientific paper
Noble gases repeatedly have served to widen the scope of meteorite research. During the first half century of such measurements, the emphasis was on the determination of U,Th/He-gas retention ages of iron meteorites, which is the most unsuitable class of meteorites for such studies. With the realization that the He in these meteorites results from the interaction of cosmic rays with meteoritic matter, meteorites became to be used as "the poor man's space probe" that yielded information on the constancy in time and space of the cosmic radiation. Another widening of scope came with the discovery of extremely high noble gas contents in the outermost layers of the individual grains that make up stony meteorites. These gases are of solar origin; they have been implanted as low-energy solar wind (5W) or as solar energetic particles (SEP) into the grains before their compaction. Presently they offer the only opportunity to precisely measure the isotopic composition of solar matter and to learn about potential changes of the Sun in time. Stony meteorites of the "carbonaceous" variety contain "stardust" that carries the undiluted nucleosynthesis products of individual Stars that yield incredibly detailed information concerning the parameters that prevailed during the synthesis.
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