{"paper":{"title":"Proton distribution radii of $^{12-19}$C illuminate features of neutron halos","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-th"],"primary_cat":"nucl-ex","authors_text":"A. Estrad\\'e, A. Evdokimov, A. Prochazka, B. Sitar, C. Nociforo, C. Scheidenberger, D. Cortina-Gil, F. Ameil, F. Farinon, G. Guastalla, G. Hagen, G. R. Jansen, H. Geissel, H.J. Ong, H. Weick, I. Dillmann, I. Mukha, I. Tanihata, J. Atkinson, J. Kurcewicz, J. S. Winfield, J. Tanaka, J. Vargas, M. Kimura, M. Marta, M. Mostazo, M. Takechi, P. Navratil, P. Strmen, R. Janik, R. Kanungo, R. Kn\\\"obel, S. Pietri, S. Terashima, W. Horiuchi, Y. Ayyad, Y. Suzuki, Yu. A. Litvinov","submitted_at":"2016-08-31T00:56:19Z","abstract_excerpt":"Proton radii of $^{12-19}$C densities derived from first accurate charge changing cross section measurements at 900$A$ MeV with a carbon target are reported. A thick neutron surface evolves from $\\sim$ 0.5 fm in $^{15}$C to $\\sim$ 1 fm in $^{19}$C. The halo radius in $^{19}$C is found to be 6.4$\\pm$0.7 fm as large as $^{11}$Li. Ab initio calculations based on chiral nucleon-nucleon and three-nucleon forces reproduce well the radii."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.08697","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"}