Solar cosmic-ray-produced radionuclides in meteorites

Details Solar cosmic-ray-produced radionuclides in meteorites Solar cosmic-ray-produced radionuclides in meteorites

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982e%26psl..59...33m&link_type=abstract

Earth and Planetary Science Letters, vol. 59, no. 1, June 1982, p. 33-48. Research supported by the Bundesministerium für Forsc

Physics

21

Meteorites, Particle Energy, Particle Interactions, Radioactive Isotopes, Solar Cosmic Rays, Solar Protons, Energy Dissipation, Lunar Rocks, Lunar Surface, Particle Production, Meteorites, Radionuclides, Cosmic Rays, Formation, Models, Protons, Spectra, Energy, Irradiation, Geometry, Flux, Production Rate, Data, Aluminum 26, Sodium 22, Manganese 53, Nickel 59, Isotopes, Interactions, Cosmic Dust, Interplanetary Dust, Theoretical Studies, Procedure, Depth, Madhipura Meteorite, Cosmogenic Nuclides, C1 Chondri

Scientific paper

Model calculations for the production of cosmogenic nuclides by solar protons in meteorites are performed to demonstrate the necessity to revise earlier estimates of SCR production of cosmogenic nuclides in meteorites concerning their absolute values and depth dependence. Energy loss calculations for a simple irradiation geometry are used to derive depth dependent proton spectra, and solar proton fluxes in arbitrarily shaped meteorites are derived from these spectra using numerical methods or closed form expressions. Depth profiles of cosmogenic radionuclides are evaluated using a system of excitation functions for the production of radionuclides from target elements, which are also used to derive production rates for Al-26, Mn-53 and Ni-59 in cosmic dust. Results show that to interpret cosmic ray interaction in small meteorites or in surface samples with minor ablation, it is necessary to consider interactions of both solar and galactic cosmic rays.

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