Mean mass of cosmic-ray Ne, Mg, SI at 1.2 GeV/amu

Details Mean mass of cosmic-ray Ne, Mg, SI at 1.2 GeV/amu Mean mass of cosmic-ray Ne, Mg, SI at 1.2 GeV/amu

Sep 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...216..646d&link_type=abstract

Astrophysical Journal, Part 1, vol. 216, Sept. 1, 1977, p. 646-649.

Astronomy and Astrophysics

Astrophysics

9

Cosmic Rays, Magnesium, Neon, Particle Mass, Silicon, Galactic Radiation, Geomagnetism, Magnetic Effects, Nuclear Fusion, Particle Energy

Scientific paper

The mean mass of cosmic-ray Ne, Mg, and Si in the energy range from 800 to 1800 MeV/amu has been measured using a technique employing the effect of the geomagnetic field on the cosmic-ray fluxes. The values for the neutron excess at the top of the atmosphere are 0.45 + or - 0.10, 0.32 + or - 0.11, and 0.26 + or - 0.16 for Ne, Mg, and Si, respectively. These results, when account is taken of the effects of galactic propagation, imply values for the neutron excess in the cosmic-ray source which are in agreement with solar-system values.

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