Neutron and proton activation measurements from SKYLAB

Astronomy and Astrophysics – Astronomy

Scientific paper

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Neutron Activation Analysis, Nuclear Interactions, Proton Flux Density, Radioactive Contaminants, Skylab 4, Thermal Neutrons, Gamma Rays, Nuclear Transformations, Radiation Effects, Spacecraft Shielding, X Ray Spectroscopy

Scientific paper

Radioactivity induced by high-energy protons and secondary neutrons (from nuclear interactions) in various samples returned from different locations in Skylab was measured directly by gamma-ray spectroscopy measurements of decay gamma rays from the samples. Incident fluxes were derived from the activation measurements, using known nuclear cross-section. Neutron and proton flux values were found to range from 0.2 to 5 particles/sq cm-sec, depending on the energy range and location in Skylab. The thermal neutron flux was less than 0.07 neutrons/sq cm-sec. The results are useful for data analysis and planning of future high-energy astronomy experiments.

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