{"paper":{"title":"First observation of unbound $^{11}$O, the mirror of the halo nucleus $^{11}$Li","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-th"],"primary_cat":"nucl-ex","authors_text":"A.H. Wuosmaa, C.D. Pruitt, C. Santamaria, C.Y. Tsang, D.E.M. Hoff, D. McNeel, G. Cerizza, J. Barney, J. Estee, J. Manfredi, J.M. Elson, J. Smith, K.W. Brown, L.G. Sobotka, M.B. Tsang, P. Morfouace, R.J. Charity, S.A. Kuvin, S.M. Wang, S. Sweany, T.B. Webb, W.G. Lynch, W. Nazarewicz, Y. Zhang, Z. Chajecki, Z. Zhu","submitted_at":"2018-12-20T22:54:37Z","abstract_excerpt":"The structure of the extremely proton-rich nucleus $^{11}_{~8}$O$_3$, the mirror of the two-neutron halo nucleus $^{11}_{~3}$Li$_8$, has been studied experimentally for the first time. Following two-neutron knockout reactions with a $^{13}$O beam, the $^{11}$O decay products were detected after two-proton emission and used to construct an invariant-mass spectrum. A broad peak of width $\\sim$3\\,MeV was observed. Within the Gamow coupled-channel approach, it was concluded that this peak is a multiplet with contributions from the four-lowest $^{11}$O resonant states: $J^{\\pi}$=3/2$^-_1$, 3/2$^-_2"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.08880","kind":"arxiv","version":2},"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"}