Numerical Study of the Generation of Linear Energy Transfer Spectra for Space Radiation Applications

Details Numerical Study of the Generation of Linear Energy Transfer Spectra for Space Radiation Applications Numerical Study of the Generation of Linear Energy Transfer Spectra for Space Radiation Applications

Nov 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005stin...0540924b&link_type=abstract

Technical Report, NASA/TP-2005-213941; L-19192

Mathematics

Logic

Extraterrestrial Radiation, Linear Energy Transfer (Let), Energy Spectra, Charged Particles, Particle Energy, Solar Corpuscular Radiation, Galactic Cosmic Rays, Solar Storms, Solar Flares, Derivation

Scientific paper

In analyzing charged particle spectra in space due to galactic cosmic rays (GCR) and solar particle events (SPE), the conversion of particle energy spectra into linear energy transfer (LET) distributions is a convenient guide in assessing biologically significant components of these spectra. The mapping of LET to energy is triple valued and can be defined only on open energy subintervals where the derivative of LET with respect to energy is not zero. Presented here is a well-defined numerical procedure which allows for the generation of LET spectra on the open energy subintervals that are integrable in spite of their singular nature. The efficiency and accuracy of the numerical procedures is demonstrated by providing examples of computed differential and integral LET spectra and their equilibrium components for historically large SPEs and 1977 solar minimum GCR environments. Due to the biological significance of tissue, all simulations are done with tissue as the target material.

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