Abstract
The interaction mean-free-path of cosmic-ray iron in air has been determined by observing the change in flux as a function of atmospheric depth. A large detector and a large variation in altitude during the balloon flight result in a high precision measurement. The result is in agreement, though slightly larger than the mean-free-path deduced from the measurements of interactions of iron on different targets at the Bevalac accelerator.
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Crane, J.H., Guo, D.D., Israel, M.H. et al. Interaction mean-free-path of cosmic-ray Fe in air. Astrophys Space Sci 94, 201–209 (1983). https://doi.org/10.1007/BF00651772
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DOI: https://doi.org/10.1007/BF00651772