Xenon from the fission of Pu-244 in achondrites

Computer Science

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Achondrites, Fission Products, Meteoritic Composition, Plutonium 244, Xenon, Enstatite, Heat Treatment, Regolith, Temperature Profiles

Scientific paper

Results are presented from an investigation of the isotopic composition of xenon in two achondrites (Chervonyi Kut and Vetluga) and of the aubrite Staroe Pes'ianoe. Stepwise annealing is used. Fission xenon and cosmogenic xenon are detected in both eucrites. In the meteorite Chervonyi Kut, the fission xenon is mainly from plutonium; in Vetluga, it is a mixture of xenon from plutonium and uranium. From the ratios of the xenon from plutonium and uranium, it is calculated that 400 million years elapsed between the cooling of the matter of these meteorites. In the aubrite Staroe Pes'ianoe, xenon which is typically solar and which is analogous to the xenon of the lunar regolith is detected.

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