Abstract
Recent data shows that the cosmic ray composition changes rapidly in the most interesting regions of the cosmic ray spectrum. The fraction of heavy nuclei grows strongly when approaching the ‘knee’ and decreases significantly before the ‘ankle’ of the spectrum. While such behaviour is not unexpected on the basis of cosmic ray acceleration and propagation models, the new results give meaningful limits on the variety of models of the cosmic ray origin.
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Stanev, T. (1993). Cosmic Ray Composition at and Above the Knee. In: Shapiro, M.M., Silberberg, R., Wefel, J.P. (eds) Particle Astrophysics and Cosmology. NATO ASI Series, vol 394. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1707-4_3
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DOI: https://doi.org/10.1007/978-94-011-1707-4_3
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