Kneelike structure in the spectrum of the heavy component of cosmic rays observed with KASCADE-Grande

Grande Collaboration, W. D. Apel, J. C. Arteaga-Velazquez +58

We report the observation of a steepening in the cosmic ray energy spectrum of heavy primary particles at about $8\times 10^{16}$ eV. This structure is also seen in the all-partic…