Elemental abundances in the local cosmic rays at high energies

The heavy-nuclei energy spectra measured aboard the Space Shuttle and on HEAO 3 are presently discussed in the framework of a leaky-box model; the source energy spectrum required for a fit, at E exp -2.2 for all nuclear species, is slightly steeper than a previous estimate. These data are presented in terms of total energy/particle, in order to allow direct comparison with the observed all-particle spectrum of cosmic rays.