Elemental cosmic ray spectra reveal two populations of Galactic sources and an immediate transition to an extragalactic component after the knee

Timur A. Dzhatdoev, Anatoly A. Semenov

The energy spectra for individual elements and/or for groups of elements in cosmic rays (CR) in the energy range between 100 $\times$ Z GeV and 10${}^3$ $\times$ Z PeV (where Z is…