Galactic cosmic ray heavy ions in near earth space: Ionization states and their significance

Details Galactic cosmic ray heavy ions in near earth space: Ionization states and their significance Galactic cosmic ray heavy ions in near earth space: Ionization states and their significance

Jan 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995adspr..15....3b&link_type=abstract

Advances in Space Research, vol. 15, no. 1, p. (1)3-(1)13

Astronomy and Astrophysics

Astrophysics

Ferric Ions, Galactic Cosmic Rays, Geomagnetism, Heavy Ions, Astrophysics, Interplanetary Space, Spacelab

Scientific paper

The Spacelab-3 cosmic ray experiment Anuradha was successfully flown and operated at an orbital altitude of 350 km and at 57 deg inclination. In addition to the determination of the ionization states of the Anomalous Cosmic Rays (ACR), this experiment enabled the measurements of ionization states (Z) of Galactic Cosmic Ray (GCR) sub-iron and iron ions (Z=21-28) of energy 25-125 MeV/N using the earth's magnetic field as a rigidity filter. From trajectory computations of a total 62 low energy events, Z was determined for 16 ACR and 46 GCR particles. 16 GCR events of sub-iron and iron ions were found to be in partially ionized states. These partially ionized ions comprising of about 30% of particles form a new subset of low energy (25-125 MeV/N) GCR. It is suggested that GCR sub-iron and iron ions of 1-10 MeV/N capture electrons while traversing Interstellar Matter (ISM) and these are reaccelerated in SNR shock fronts in ISM and also in heliospheric boundary to energies of 100-500 MeV/N before entering the inner solar system.

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