Isotopic composition of silicon and iron in the galactic cosmic radiation.

Details Isotopic composition of silicon and iron in the galactic cosmic radiation. Isotopic composition of silicon and iron in the galactic cosmic radiation.

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...314..785h&link_type=abstract

Astronomy and Astrophysics, v.314, p.785-794

Astronomy and Astrophysics

Astrophysics

6

Cosmic Rays

Scientific paper

In this paper, we report on the isotopic abundances of galactic cosmic ray silicon and iron as measured on our 1987 balloon flight from Prince Albert, Saskatchewan, Canada. The ALICE (A Large Isotopic Composition Experiment) instrument is a balloon-borne spectrometer designed to measure the isotopic composition of cosmic rays in the elemental range silicon through iron. The instrument uses the Cherenkov-range technique and resolves masses for particles with kinetic energies from ~350MeV/nucleon to ~800MeV/nucleon incident upon the Cherenkov detector. We observe no measurable excess of ^29^Si, ^30^Si, ^54^Fe, ^57^Fe or ^58^Fe and therefore are consistent with a solar-system-like cosmic ray source abundance.

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