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Xenon spallation systernatics in Angra dos Reis

1981; Elsevier BV; Volume: 45; Issue: 10 Linguagem: Inglês

10.1016/0016-7037(81)90021-1

1872-9533

C. M. Hohenberg, B. Hudson, B. M. Kennedy, F. A. Podosek,

Planetary Science and Exploration

We have resolved literature Xe data for the Angra dos Reis meteorite into constituent spallation, fission and trapped components. The spallation Xe compositions vary over a range wider than observed in any other samples, including lunear samples. These variations are due to the mixing of spallation Xe from Ba and rare earth element targets. It is possible to infer the Ba and rare earth spallation Xe compositions. Angra dos Reis spallation Xe compositions are systematically different from those observed in lunar samples, possibly because of differences in the irradiation conditions (geometry and shielding). Thus the Angra dos Reis data appear to be superior to lunar data for predicting spallation Xe compositions in other meteorites.