Physics – Nuclear Physics
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icrc....2...60e&link_type=abstract
In NASA. Goddard Space Flight Center 19th Intern. Cosmic Ray Conf., Vol. 2 p 60-63 (SEE N85-34006 22-93)
Physics
Nuclear Physics
Cosmic Rays, Galactic Radiation, Helium Isotopes, Hydrogen Isotopes, International Sun Earth Explorer 3, Nuclei (Nuclear Physics), Energy Spectra, Mathematical Models, Solar Activity, Wave Propagation
Scientific paper
The differential flux of the hydrogen and helium isotopes was measured using an instrument on the ISEE-3 spacecraft during solar quiet time periods from August 1978 through December 1983. These measurements cover the energy range from 26 MeV/nucleon through 138 MeV/nucleon for both H-1 and He-4, from 24 to 89 MeV/nucleon for H-2, and from 43 to 146 solar activity varied from near minimum to maximum conditions causing the observed flux of galactic cosmic rays to modulate by an order of magnitude. To describe the propagation in the galaxy, it was found that the standard leaky box approximation with an escape path length of 6.7 g/sq cms forms a self consistent model for the light cosmic ray nuclei at the observed energies.
Evenson Paul
Kroeger Richard
Meyer Pascal
Miller Daniel D.
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