The Sun: A Great Ball Of Iron?
July 17, 2002
http://www.sciencedaily.com/releases/2002/07/020717080229.htm
“strange xenon”
Jupiter’s helium-rich atmosphere contains xenon with excess 136Xe and the ratio of r-products more closely resembles “strange” xenon (Xe-X, alias Xe-HL) seen in carbonaceous chondrites than xenon seen in the solar wind (SW-Xe ). The linkage of primordial helium with Xe-X, as seen on a microscopic scale in meteorites, apparently extended across planetary distances in the solar nebula, This is expected if the solar system acquired its present chemical and isotopic diversity directly from debris of the star that produced our elements.
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What makes xenon the noble gas of choice? Besides the fact that it has more stable isotopes than any other noble gas and lies in the region of the mass spectrum that has the least contamination, it has also provided the most information about the ea rly history of the solar system and the origin of its elements. Xenon isotopes contain decay products of the first two extinct radionuclides3,4 discovered in the solar system in the 1960s. In 1960, xenon provided the first hint that isotopic ratios of primordial elements might vary within the solar system5, and xenon isotopes first carried the message in 1972 that one form of xenon, Xe-X, might have been “... added to our solar system from a nearby supernova, although no evidence for the addition of products from a separate nucleosynthesis event has been found in other elements.” (MANUEL et al.6, p. 100)
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Soon after confirmation7 of excess 124,126Xe and 134,136Xe in the Allende meteorite from the p- and r-processes of nucleosynthesis8, xenon isotopes in the Murchison meteorite revealed a complementary component9, Xe-S, characterized by excess 128-132Xe from the s-process of nucleosynthesis8. More important for the present study are the finding10 and confirmation11 that primordial He is always closely coupled with isotopically strange Xe-X in meteorites.
SOURCE: http://www.omatumr.com/picpages/JRANC-xenonpaper.html
Strange Xenon in Jupiter
O. MANUEL, KEN WINDLER, ADAM NOLTE, LUCIE JOHANNES, JOSHUA ZIRBEL, AND DANIEL RAGLAND
Departments of Chemistry, Chemical Engineering, Metallurgical Engineering, Physics, Geology and Geophysics
University of Missouri, Rolla, Missouri 65401, USA
Correspondence author’s e-mail address: om@umr.edu