{"paper":{"title":"A proton density bubble in the doubly magic $^{34}$Si nucleus","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"2), 3), A. Gade (3), A. Lemasson (2, A. Lepailleur (2), A. Mutschler (1, C. Borcea (4), D. Bazin (3), D. Sohler (5), D. Weisshaar (3), E. Khan (1), F. Recchia (3), F. Rotaru (4), H. Iwasaki (3), J. A. Tostevin, J.P. Ebran, K. Wimmer (3) ((1) IPNO (2) GANIL (3) NSCL (4) IFIN HH (5) ATOMKI), M. Stanoiu (4), M. Vandebrouck (1), O. Sorlin (2), R. Borcea (4), S.R. Stroberg (3), T. Roger (2), Z. Dombradi (5)","submitted_at":"2017-07-12T07:54:14Z","abstract_excerpt":"Many properties of the atomic nucleus, such as vibrations, rotations and incompressibility, can be interpreted as due to a two component quantum liquid of protons and neutrons. Electron scattering measurements on stable nuclei demonstrate that their central densities are saturated, as for liquid drops. In exotic nuclei near the limits of mass and charge, with large imbalances in their proton and neutron numbers, the possibility of a depleted central density, or a 'bubble' structure, has been discussed in a recurrent manner since the 1970s. Here we report first experimental evidence that points"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.03583","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"}