Sources of inner radiation zone energetic helium ions: Cross-field transport versus in-situ nuclear reactions

Sources of inner radiation zone energetic helium ions: Cross-field transport versus in-situ nuclear reactions

Radial transport theory for inner radiation zone MeV He ions has been extended by combining radial diffusive transport, losses due to Coulomb friction and charge exchange reaction with local generation of 3He and 4He ions due to nuclear reactions taking place on the inner edge of the inner radiation...

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Bibliographic Details
Published in:Advances in space research Vol. 21; no. 12; pp. 1675 - 1678
Main Authors: Spjeldvik, Walther N., Pugacheva, Galina I., Gusev, Anatoly A., Martin, Inacio M., Sobolevsky, Nikolai M.
Format: Journal Article
Language:English
Published: England Elsevier Ltd 01-01-1998
Subjects:
Cosmic Radiation
Earth (Planet)
Elementary Particle Interactions
Extraterrestrial Environment
Helium
Ions
Isotopes
Magnetics
Models, Theoretical
Nuclear Physics
Oxygen
Protons
Space life sciences
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Summary:Radial transport theory for inner radiation zone MeV He ions has been extended by combining radial diffusive transport, losses due to Coulomb friction and charge exchange reaction with local generation of 3He and 4He ions due to nuclear reactions taking place on the inner edge of the inner radiation zone. From interactions between high energy trapped protons and upper atmospheric constituents we have included a nuclear reaction yield helium flux source that was numerically derived from a nuclear reaction model originally developed at the Institute of Nuclear Researches of Moscow, Russia and implemented in the computer system at the University of Campinas, Brazil. Magnetospheric transport computations have been made covering the L-shell range L=1.0 to 1.6 and the resulting MeV He ion flux distributions show a strong influence of the local nuclear source mechanism on the inner zone energetic He ion content.
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ISSN:0273-1177
1879-1948
DOI:10.1016/S0273-1177(98)00013-1