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Negative correlation of iodine‐129/iodine‐127 and xenon‐129/xenon‐132: Product of closed‐system evolution or evidence of a mixed component
Author(s) -
GILMOUR J. D.,
WHITBY J. A.,
TURNER G.
Publication year - 2001
Publication title -
meteoritics and planetary science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.09
H-Index - 100
eISSN - 1945-5100
pISSN - 1086-9379
DOI - 10.1111/j.1945-5100.2001.tb01961.x
Subject(s) - xenon , isotopes of xenon , iodine , chemistry , component (thermodynamics) , product (mathematics) , analytical chemistry (journal) , radiochemistry , atomic physics , physics , thermodynamics , chromatography , organic chemistry , geometry , mathematics
— Anti‐correlation of initial iodine ratios with trapped 129 Xe/ 132 Xe ratios has been interpreted as resulting from 129 I decay to 129 Xe in a closed system. However, many of the 129 Xe/ 132 Xe ratios that contribute to the anti‐correlations are lower than 1.04, the value characteristic of major solar system reservoirs; 129 I decay cannot lead to a decrease in this ratio. We offer an alternative explanation for the anti‐correlations, based on trapped iodine and xenon components similar to those observed in Nakhla, that does not require the existence of components with 129 Xe/ 132 Xe lower than solar.