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Composition of interplanetary particles at energies from 0.1 to 150 MeV/nucleon, part BDuring the Apollo 16 mission, a solar flare produced an enormous amount of low-energy nuclei, many orders of magnitude greater than the level inferred from studies of tracks in the window of the Apollo 12 spacecraft during a time when the sun was quiet. The differential energy spectrum of nuclei with Z less than or equal to 6 falls by seven orders of magnitude over the interval from 0.1 to 20 MeV/nucleon, then remains almost flat up to approximately 100 MeV/nucleon. The two parts correspond to contributions from the sun and from galactic cosmic rays. Any maximum in the spectrum occurs below the lowest energy studied.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Price, P. B.
(California Univ. Berkeley, CA, United States)
Braddy, D.
(California Univ. Berkeley, CA, United States)
Osullivan, D.
(California Univ. Berkeley, CA, United States)
Sullivan, J. D.
(California Univ. Berkeley, CA, United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1972
Publication Information
Publication: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.
Subject Category
Space Radiation
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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