{"paper":{"title":"Impurity effect of Lambda particle on the structure of 18F and 19F_Lambda","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"nucl-th","authors_text":"H. Sagawa, K. Hagino, Y. Tanimura","submitted_at":"2012-08-27T10:08:42Z","abstract_excerpt":"We perform three-body model calculations for a $sd$-shell hypernucleus $^{19}_{\\Lambda}$F ($^{17}_{\\Lambda}{\\rm O}+p+n$) and its core nucleus $^{18}$F ($^{16}{\\rm O}+p+n$), employing a density-dependent contact interaction between the valence proton and neutron. We find that the $B(E2)$ value from the first excited state (with spin and parity of $I^\\pi=3^+$) to the ground state ($I^\\pi=1^+$) is slightly decreased by the addition of a $\\Lambda$ particle, which exhibits the so called shrinkage effect of $\\Lambda$ particle. We also show that the excitation energy of the $3^+$ state is reduced in "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.5352","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"}