{"paper":{"title":"Strong neutron pairing in core+4n nuclei","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Estrade, A. Heinz, A. Henriques, A. Hufnagel, A. Ignatov, A. Kelic-Heil, A. Knyazev, A. Movsesyan, A. Perea, A. Revel, A. Wagner, A. Zilges, B. Jonson, C. A. Bertulani, C. Caesar, C. Langer, C. Nociforo, C. Rigollet, C. Wheldon, D. Bemmerer, D. Cortina-Gil, D. Galaviz, D. Rossi, D. Savran, D. Yakorev, E. Casarejos, E. Cravo, E. Nacher, E. Nikolskii, F. Farinon, F.M. Marques, F. Wamers, G. Ribeiro, G. Wilson, H. Alvarez-Pol, H. Geissel, H. Scheit, H. Simon, H.T. Johansson, H. Weick, I. Dillmann, I. Syndikus, J. Benlliure, J. Cederk\\\"all, J. Enders, J. Hagdahl, J. Kahlbow, J. Machado, J. Marganiec, J. M. Boillos, J. S. Winfield, J. T. Taylor, K. Boretzky, K. G\\\"obel, K. Zuber, L. Atar, L. Chulkov, L. M. Fraile, M. Caamano, M. Chartier, M. Freer, M. Heil, M. Heine, M. Holl, M. J. G. Borge, M. Labiche, M. Najafi, M. Petri, M. Roder, M. Vandebrouck, M. Zhukov, N. Kalantar-Nayestanaki, N. Kurz, O. Ershova, O. Sorlin, O. Tengblad, P. Diaz Fernandez, P. Golubev, P. Velho, P. Woods, R. Crespo, R. Gernhauser, R. Kanungo, R. Lemmon, R. Plag, R. Reifarth, R. Thies, S. Beceiro-Novo, S. Lindberg, S. Paschalis, S. Pietri, T. Aumann, T. Heftrich, T. Kroll, T. Le Bleis, T. Nilsson, U. Datta Pramanik, V. Avdeichikov, V. Panin, V. Volkov, W.N. Catford, Y. Togano, Z. Elekes","submitted_at":"2018-03-13T13:17:35Z","abstract_excerpt":"The emission of neutron pairs from the neutron-rich $N\\!=\\!12$ isotones $^{18}$C and $^{20}$O has been studied by high-energy nucleon knockout from $^{19}$N and $^{21}$O secondary beams, populating unbound states of the two isotones up to 15~MeV above their two-neutron emission thresholds. The analysis of triple fragment-$n$-$n$ correlations shows that the decay $^{19}$N$(-1p)^{18}$C$^*\\!\\rightarrow^{16}$C+$n$+$n$ is clearly dominated by direct pair emission. The two-neutron correlation strength, the largest ever observed, suggests the predominance of a $^{14}$C core surrounded by four valence"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.04777","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"}