{"paper":{"title":"A Multi-Component Measurement of the Cosmic Ray Composition Between 10^{17} eV and 10^{18} eV","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A.Huang, B.C.Knapp, B.E.Fick, B.J.Newport, B.R.Dawson, C.C.Jui, C.E.Covault, C.G.Larsen, C.R.Wilkinson, C.Song, D.B.Kieda, D.F.Nitz, D.J.Bird, D.Sinclair, E.C.Loh, E.J.Mannel, G.F.Chen, H.Y.Dai, J.Boyer, J.C.van der Velde, J.D.Smith, J.K.K.Tang, J.Matthews, J.N.Matthews, J.W.Cronin, J.W.Elbert, J.W.Fowler, K.Belov, K.D.Green, K.G.Gibbs, K.M.Simpson, L.F.Fortson, L.R.Wiencke, M.A.K.Glasmacher, M.Catanese, M.J.Kidd, P.Sokolsky, P.Sommers, R.A.Ong, R.W.Clay, S.B.Thomas, S.Ko, S.Yoshida, T.Abu-Zayyad, W.Lee, X.Z.Zhang (HiRes-MIA Collaboration), Y.Ho, Z.Cao","submitted_at":"1999-11-09T16:54:16Z","abstract_excerpt":"The average mass composition of cosmic rays with primary energies between $10^{17}$eV and $10^{18}$eV has been studied using a hybrid detector consisting of the High Resolution Fly's Eye (HiRes) prototype and the MIA muon array. Measurements have been made of the change in the depth of shower maximum, $X_{max}$, and in the change in the muon density at a fixed core location, $\\rho_\\mu(600m)$, as a function of energy. The composition has also been evaluated in terms of the combination of $X_{max}$ and $\\rho_\\mu(600m)$. The results show that the composition is changing from a heavy to lighter mi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9911144","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/9911144/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}