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Title:
On the charge state of anomalous oxygen
Authors:
Oschlies, K.; Beaujean, R.; Enge, W.
Affiliation:
AA(Kiel, Universität, Germany), AB(Kiel, Universität, Germany), AC(Kiel, Universität, Germany)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 345, Oct. 15, 1989, p. 776-781. (ApJ Homepage)
Publication Date:
10/1989
Category:
Space Radiation
Origin:
STI
NASA/STI Keywords:
Cosmic Rays, Electric Charge, Oxygen, Abundance, Argon, Carbon, Galactic Cosmic Rays, Geomagnetism, Neon, Nitrogen, Spacelab
DOI:
10.1086/167949
Bibliographic Code:
1989ApJ...345..776O

Abstract

With the experiment 1ES024 aboard Spacelab 1 measurements were made of low-energy cosmic radiation within 10-18 MeV nucleon. With the help of a time-resolving unit it was possible to correlate the impact time to the geomagnetical conditions at the impact location for many particles. By means of cutoff rigidity considerations and trajectory tracing calculations it was possible to confirm the predicted single ionization state for the anomalous oxygen component. Furthermore, it was possible to distinguish among an anomalous component, Galactic cosmic rays, and the magnetospherical contribution to the registered oxygen nuclei. For one particle of both carbon and neon, single ionization states could be verified by trajectory tracing calculations.

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