{"paper":{"title":"Direct mapping of nuclear shell effects in the heaviest elements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"C. Droese, Ch. E. D\\\"ullmann, C. Scheidenberger, C. Weber, D. Ackermann, D. Nesterenko, D. Rodr\\'iguez, E. Haettner, E. Minaya Ramirez, F. Herfurth, F.P. He{\\ss}berger, G. Marx, J. Ketelaer, K. Blaum, L. Schweikhard, M. Block, M. Dworschak, M. Eibach, M. Mazzocco, P.G. Thirolf, S. Eliseev, S. Hofmann, W.R. Pla{\\ss}, Yu.N. Novikov","submitted_at":"2014-06-25T07:05:02Z","abstract_excerpt":"Quantum-mechanical shell effects are expected to strongly enhance nuclear binding on an \"island of stability\" of superheavy elements. The predicted center at proton number $Z=114,120$, or $126$ and neutron number $N=184$ has been substantiated by the recent synthesis of new elements up to $Z=118$. However the location of the center and the extension of the island of stability remain vague. High-precision mass spectrometry allows the direct measurement of nuclear binding energies and thus the determination of the strength of shell effects. Here, we present such measurements for nobelium and law"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.6477","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"}