Cosmic Ray Source Abundances for 29≤Z≤34

George, J. S.
Binns, W. R.
Christian, E. R.
Cummings, A. C.
Hink, P. L.
Klarmann, J.
Leske, R. A.
Lijowski, M.
Mewaldt, R. A.
Stone, E. C.
von Rosenvinge, T. T.
Wiedenbeck, M. E.
Yanasak, N. E.

Publication date

January 1999

Publisher

International Union of Pure and Applied Physics

Abstract

The Cosmic Ray Isotope Spectrometer (CRIS) instrument on board the Advanced Composition Explorer (ACE) spacecraft is making new measurements of nuclides just beyond the iron-nickel peak in the galactic cosmic rays. Isotopes of copper and zinc have been resolved for the first time. Elemental abundances for nuclei with 29≤Z≤34 are reported with good separation between species. Several of these elements are useful for studying fractionation processes which may depend on the first ionization potential or volatility. Source abundances are estimated using a prior propagation calculation and their potential for distinguishing between source models are discussed