{"paper":{"title":"Quadrupole collectivity in neutron-deficient Sn nuclei: \\nuc{104}{Sn} and the role of proton excitations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Ekstrom, A. Gade, B. A. Brown, D. Bazin, D. Weisshaar, J. S. Berryman, K. Wimmer, M. Hjorth-Jensen, R. Winkler, S. R. Stroberg, T. Baugher, V. M. Bader, W. B. Walters","submitted_at":"2013-10-22T17:09:18Z","abstract_excerpt":"We report on the experimental study of quadrupole collectivity in the neutron-deficient nucleus \\nuc{104}{Sn} using intermediate-energy Coulomb excitation. The $B(E2; 0^+_1 \\rightarrow 2^+_1)$ value for the excitation of the first $2^+$ state in \\nuc{104}{Sn} has been measured to be $0.180(37)~e^2$b$^2$ relative to the well-known $B(E2)$ value of \\nuc{102}{Cd}. This result disagrees by more than one sigma with a recently published measurement \\cite{Gua13}. Our result indicates that the most modern many-body calculations remain unable to describe the enhanced collectivity below mid-shell in Sn "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.5987","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"}