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Approximations for neutron emission spectra from proton collisions between 20 and 500 MeV on nuclei of A greater than or equal to 12When high energy protons from solar proton events or trapped radiation belts impinge on spacecraft structures, secondary particles are emitted. The most pernicious secondaries, from either a biological or physical standpoint, are the cascade and evaporation neutrons because of their reaction with matter leading to radioactive materials in the spacecraft structures. Empirically determined cascade and evaporation neutron emission spectra for protons of energy between 20 and 500 MeV incident on all materials at or above carbon in mass number are presented.
Document ID
19730021093
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Technical Note (TN)
Authors
Burrell, M. O. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
September 2, 2013
Publication Date
August 1, 1973
Subject Category
Space Radiation
Report/Patent Number
M-455
NASA-TN-D-7386
Accession Number
73N29825
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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