The results of ATIC-2 experiment for elemental spectra of cosmic rays
  The results of ATIC-2 baloon experiment (2002-2003) for energy spectra of protons, He, C, O, Ne, Mg, Si, Fe, some groups of nuclei, and all-particle spectrum in primary cosmic rays are presented in energy region 50GeV--200TeV. The conclusion is that the spectra of protons and helium nuclei are essentially different (the spectrum of protons is steeper) and the spectra of protons and heavy nuclei have no-power form. 
A.D. Panov, J.H. Adams, H.S. Ahn, G.L. Bashindzhagyan, K.E. Batkov, J.   Chang, M. Christl, A.R. Fazely, O. Ganel, R.M. Guna...