{"paper":{"title":"Direct Evidence of Octupole Deformation in Neutron-Rich $^{144}$Ba","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. B. Hayes, A. D. Ayangeakaa, A. Korichi, A. O. Macchiavelli, A. Richard, A. Wiens, B. Bucher, B. P. Kay, C. Dickerson, C. J. Chiara, C. M. Campbell, C. R. Hoffman, C. Y. Wu, D. Cline, D. Seweryniak, E. T. Gregor, F. G. Kondev, G. Savard, H. L. Crawford, H. M. David, J. A. Clark, J. Harker, M. Albers, M. A. Riley, M. Cromaz, M. K. Smith, M. P. Carpenter, M. Scheck, P. A. Butler, R. C. Pardo, R. V. F. Janssens, R. Vondrasek, S. Zhu, T. Lauritsen","submitted_at":"2016-02-03T21:20:29Z","abstract_excerpt":"The neutron-rich nucleus $^{144}$Ba ($t_{1/2}$=11.5 s) is expected to exhibit some of the strongest octupole correlations among nuclei with mass numbers $A$ less than 200. Until now, indirect evidence for such strong correlations has been inferred from observations such as enhanced $E1$ transitions and interleaving positive- and negative-parity levels in the ground-state band. In this experiment, the octupole strength was measured directly by sub-barrier, multi-step Coulomb excitation of a post-accelerated 650-MeV $^{144}$Ba beam on a 1.0-mg/cm$^2$ $^{208}$Pb target. The measured value of the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.01485","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"}