{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:IKIY3BARH4MZL7MUO4PYUU7AS3","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"3a4b528e9b32f232cd1575ae5763dfdfb13fbac7ad8a984c3cef45645bf23038","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2013-10-09T04:54:05Z","title_canon_sha256":"af3e71e625afc0c0c5a5e24be8f23a38b36917a05370c8ee60a5fe35f7401a82"},"schema_version":"1.0","source":{"id":"1310.2344","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.2344","created_at":"2026-05-18T03:06:54Z"},{"alias_kind":"arxiv_version","alias_value":"1310.2344v1","created_at":"2026-05-18T03:06:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.2344","created_at":"2026-05-18T03:06:54Z"},{"alias_kind":"pith_short_12","alias_value":"IKIY3BARH4MZ","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_16","alias_value":"IKIY3BARH4MZL7MU","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_8","alias_value":"IKIY3BAR","created_at":"2026-05-18T12:27:46Z"}],"graph_snapshots":[{"event_id":"sha256:bb331f1b52d4598db7be8bb561fef58c9e2c369ef740d544d30b7a83fdcb7c99","target":"graph","created_at":"2026-05-18T03:06:54Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The 'island of inversion' around $^{32}$Mg is one of the most important paradigm for studying the disappearance of the stabilizing 'magic' of a shell closure. We present the first Penning-trap mass measurements of the exotic nuclides $^{29-31}$Na and $^{30-34}$Mg, which allow a precise determination of the empirical shell gap for $^{32}$Mg. The new value of 1.10(3) MeV is the lowest observed shell gap for any nuclide with a canonical magic number.","authors_text":"A.A. Kwiatkowski, A. Chaudhuri, A. Lennarz, A.T. Gallant, B.E. Schultz, C. Andreoiu, D. Lunney, G. Gwinner, J. Dilling, M.C. Simon, S. Ettenauer, T. Brunner, T.D. Macdonald, U. Chowdhury, V.V. Simon","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2013-10-09T04:54:05Z","title":"Extinction of the N=20 neutron-shell closure for 32Mg examined by direct mass measurements"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.2344","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:ea7dd361c52f1e66e95ace700ebb20d5e7250cc4cc57350d2ff60f959e83ac5d","target":"record","created_at":"2026-05-18T03:06:54Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"3a4b528e9b32f232cd1575ae5763dfdfb13fbac7ad8a984c3cef45645bf23038","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2013-10-09T04:54:05Z","title_canon_sha256":"af3e71e625afc0c0c5a5e24be8f23a38b36917a05370c8ee60a5fe35f7401a82"},"schema_version":"1.0","source":{"id":"1310.2344","kind":"arxiv","version":1}},"canonical_sha256":"42918d84113f1995fd94771f8a53e096ed438390dc76d3deb4be2b88057a1820","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"42918d84113f1995fd94771f8a53e096ed438390dc76d3deb4be2b88057a1820","first_computed_at":"2026-05-18T03:06:54.279874Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:06:54.279874Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"e3brhj6H45czX9QdRPFjNX+JNeIrfE9O6t+eU7ZcLMlmqgJsRrZ0hlRoKnCaobYPlx4LUdG0cH0NW7hWJ1pjDA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:06:54.280538Z","signed_message":"canonical_sha256_bytes"},"source_id":"1310.2344","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ea7dd361c52f1e66e95ace700ebb20d5e7250cc4cc57350d2ff60f959e83ac5d","sha256:bb331f1b52d4598db7be8bb561fef58c9e2c369ef740d544d30b7a83fdcb7c99"],"state_sha256":"f5cd191e71c2d32557abe8e38305c8159deef89a513368b417219d88f4f72e4b"}