{"paper":{"title":"Cosmic-Ray Proton and Helium Spectra from the First CREAM Flight","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Malinine, E.S. Seo, G. Bigongiari, H.S. Ahn, I.H. Park, J.A. Jeon, J.H. Han, J.J. Beatty, J.T. Childers, J. Wu, J. Yang, K.C. Kim, L. Lutz, M.A. DuVernois, M.G. Bagliesi, M.H. Lee, N.B. Conklin, N.H. Park, O. Ganel, P.J. Boyle, P. Maestro, P.S. Allison, P.S. Marrocchesi, R. Sina, R. Zei, S.A. Minnick, S. Coutu, S.I. Mognet, S. Nam, S. Nutter, S.P. Wakely, S. Swordy, S.Y. Zinn, Y.S. Yoon","submitted_at":"2011-02-13T10:24:22Z","abstract_excerpt":"Cosmic-ray proton and helium spectra have been measured with the balloon-borne Cosmic Ray Energetics And Mass experiment flown for 42 days in Antarctica in the 2004-2005 austral summer season. High-energy cosmic-ray data were collected at an average altitude of ~38.5 km with an average atmospheric overburden of ~3.9 g cm$^{-2}$. Individual elements are clearly separated with a charge resolution of ~0.15 e (in charge units) and ~0.2 e for protons and helium nuclei, respectively. The measured spectra at the top of the atmosphere are represented by power laws with a spectral index of -2.66 $\\pm$ "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.2575","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}