A measurement of the cosmic-ray source abundance of Ca-40

Details A measurement of the cosmic-ray source abundance of Ca-40 A measurement of the cosmic-ray source abundance of Ca-40

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...232l.161t&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 232, Sept. 15, 1979, p. L161-L164.

Astronomy and Astrophysics

Astrophysics

3

Abundance, Calcium, Interstellar Matter, Primary Cosmic Rays, Balloon-Borne Instruments, Galactic Radiation, Iron, Isotopes, Particle Trajectories

Scientific paper

The measured charge composition of the galactic cosmic rays from Ar to
Ni and the isotopic composition of the elements Ca and Sc are presented.
It is found that the ratio Ca-40/Fe at the cosmic-ray source is (5.9
plus or minus 1.9)%. This result is in good agreement with the
meteoritic value (6.8 plus or minus 1.0)%.

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