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Published 2007 | Published
Book Section - Chapter Open

Primary and secondary contributions to arriving abundances of cosmic x-ray nuclides

Abstract

The arriving abundances of a variety of cosmic-ray nuclides consist of comparable amounts of primary material produced by stellar nucleosynthesis and secondary matter resulting from fragmentation of heavier nuclei by collisions during interstellar propagation. We discuss a technique for extracting the primary and secondary contributions that takes advantage of energy spectra of individual nuclides available from the Advanced Composition Explorer mission, a data base of measured and calculated fragmentation cross sections, and the leaky box model of interstellar propagation.

Additional Information

Copyright Universidad Nacional Autónoma de México. This work was supported by NASA at Caltech (under grant NAG5-12929), JPL, Washington University, and GSFC.

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