Composition of Galactic Cosmic Rays from CU to Se

Details Composition of Galactic Cosmic Rays from CU to Se Composition of Galactic Cosmic Rays from CU to Se

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...194.1104g&link_type=abstract

American Astronomical Society, 194th AAS Meeting, #11.04; Bulletin of the American Astronomical Society, Vol. 31, p.842

Astronomy and Astrophysics

Astronomy

Scientific paper

The rare heavy elements between Cu and Se (29<=Z<=34) just beyond the iron nickel peak are of special interest for the origin and acceleration of galactic cosmic rays. These elements reflect the composition of the cosmic ray source as they have little contamination from secondary fragments during transport. In addition, many of these elements are useful for distinguishing between first ionization potential and volatility dependent fractionation processes. The Cosmic Ray Isotope Spectrometer (CRIS) instrument on the Advanced Composition Explorer (ACE) spacecraft has been recording these heavy elements for over one year. We report ACE/CRIS elemental and isotopic abundances for elements between Cu and Se and discuss the inferred source composition using a standard propagation model. This work is supported by NASA under grant NAG5-6912.

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