{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:SSV4Z4FLOL2ORPVMXAMCTB2BML","short_pith_number":"pith:SSV4Z4FL","canonical_record":{"source":{"id":"1408.4872","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2014-08-21T04:09:36Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"533ca2853075fa3b30b492ed7309a0dfff9cbda5f8ea1cf6d7435d5a3a490e7b","abstract_canon_sha256":"73252dd79afc2ef28dd8d77bba0ced398a22fcf8f29b0ff4d4cb165a54eaddf2"},"schema_version":"1.0"},"canonical_sha256":"94abccf0ab72f4e8beacb81829874162c300d459e0f9e40c5ba00b5b5169ba86","source":{"kind":"arxiv","id":"1408.4872","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1408.4872","created_at":"2026-05-18T01:42:16Z"},{"alias_kind":"arxiv_version","alias_value":"1408.4872v1","created_at":"2026-05-18T01:42:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.4872","created_at":"2026-05-18T01:42:16Z"},{"alias_kind":"pith_short_12","alias_value":"SSV4Z4FLOL2O","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_16","alias_value":"SSV4Z4FLOL2ORPVM","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_8","alias_value":"SSV4Z4FL","created_at":"2026-05-18T12:28:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:SSV4Z4FLOL2ORPVMXAMCTB2BML","target":"record","payload":{"canonical_record":{"source":{"id":"1408.4872","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2014-08-21T04:09:36Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"533ca2853075fa3b30b492ed7309a0dfff9cbda5f8ea1cf6d7435d5a3a490e7b","abstract_canon_sha256":"73252dd79afc2ef28dd8d77bba0ced398a22fcf8f29b0ff4d4cb165a54eaddf2"},"schema_version":"1.0"},"canonical_sha256":"94abccf0ab72f4e8beacb81829874162c300d459e0f9e40c5ba00b5b5169ba86","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:42:16.393987Z","signature_b64":"fkwfDMR1EzWu6DGUXl/kMiNEWU4kTf0bFyl+nZI94OG0IWLwjUy2t2cY3VbdDd5KeD0HE9pFVwx4gCuaa0pWCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"94abccf0ab72f4e8beacb81829874162c300d459e0f9e40c5ba00b5b5169ba86","last_reissued_at":"2026-05-18T01:42:16.393290Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:42:16.393290Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1408.4872","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:42:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OXfhRA/p0E9IQ1iTtS2qIoTnTkS4UM28HobkRf0B7nlt9rrzoAlVx7m4RahPieoR9i/H+JHNAcUwbsOV2IftAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T01:08:34.323946Z"},"content_sha256":"ed7f9129d98e9c95815da66b27a66661ddd44fbb9d687e96df548fb012390883","schema_version":"1.0","event_id":"sha256:ed7f9129d98e9c95815da66b27a66661ddd44fbb9d687e96df548fb012390883"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:SSV4Z4FLOL2ORPVMXAMCTB2BML","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Systematic study of shell gaps in nuclei","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"nucl-th","authors_text":"Min Liu, Ning Wang, Qiuhong Mo","submitted_at":"2014-08-21T04:09:36Z","abstract_excerpt":"The nucleon separation energies and shell gaps in nuclei over the whole nuclear chart are systematically studied with eight global nuclear mass models. For unmeasured neutron-rich and super-heavy regions, the uncertainty of the predictions from these different mass models is still large. The latest version (WS4) of the Weizs\\\"acker-Skyrme mass formula, in which the isospin dependence of model parameters is introduced into the macroscopic-microscopic approach inspired by the Skyrme energy-density functional, is found to be the most accurate one in the descriptions of nuclear masses, separation "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.4872","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:42:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v6jIlqCmY+bANCkVlgCpOUvhNJ4n/AzD0cC7DH9Gs09uFfFrwKHvHJkVqi+kpS8Z7iSdqhueOYaTbqH/sibaAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T01:08:34.324292Z"},"content_sha256":"b8188e53175dd0ce6744ea47b9f1ad2785d62c53faa637cc797484a368ec2942","schema_version":"1.0","event_id":"sha256:b8188e53175dd0ce6744ea47b9f1ad2785d62c53faa637cc797484a368ec2942"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SSV4Z4FLOL2ORPVMXAMCTB2BML/bundle.json","state_url":"https://pith.science/pith/SSV4Z4FLOL2ORPVMXAMCTB2BML/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SSV4Z4FLOL2ORPVMXAMCTB2BML/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-09T01:08:34Z","links":{"resolver":"https://pith.science/pith/SSV4Z4FLOL2ORPVMXAMCTB2BML","bundle":"https://pith.science/pith/SSV4Z4FLOL2ORPVMXAMCTB2BML/bundle.json","state":"https://pith.science/pith/SSV4Z4FLOL2ORPVMXAMCTB2BML/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SSV4Z4FLOL2ORPVMXAMCTB2BML/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:SSV4Z4FLOL2ORPVMXAMCTB2BML","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":"73252dd79afc2ef28dd8d77bba0ced398a22fcf8f29b0ff4d4cb165a54eaddf2","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2014-08-21T04:09:36Z","title_canon_sha256":"533ca2853075fa3b30b492ed7309a0dfff9cbda5f8ea1cf6d7435d5a3a490e7b"},"schema_version":"1.0","source":{"id":"1408.4872","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1408.4872","created_at":"2026-05-18T01:42:16Z"},{"alias_kind":"arxiv_version","alias_value":"1408.4872v1","created_at":"2026-05-18T01:42:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.4872","created_at":"2026-05-18T01:42:16Z"},{"alias_kind":"pith_short_12","alias_value":"SSV4Z4FLOL2O","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_16","alias_value":"SSV4Z4FLOL2ORPVM","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_8","alias_value":"SSV4Z4FL","created_at":"2026-05-18T12:28:49Z"}],"graph_snapshots":[{"event_id":"sha256:b8188e53175dd0ce6744ea47b9f1ad2785d62c53faa637cc797484a368ec2942","target":"graph","created_at":"2026-05-18T01:42:16Z","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 nucleon separation energies and shell gaps in nuclei over the whole nuclear chart are systematically studied with eight global nuclear mass models. For unmeasured neutron-rich and super-heavy regions, the uncertainty of the predictions from these different mass models is still large. The latest version (WS4) of the Weizs\\\"acker-Skyrme mass formula, in which the isospin dependence of model parameters is introduced into the macroscopic-microscopic approach inspired by the Skyrme energy-density functional, is found to be the most accurate one in the descriptions of nuclear masses, separation ","authors_text":"Min Liu, Ning Wang, Qiuhong Mo","cross_cats":["nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2014-08-21T04:09:36Z","title":"Systematic study of shell gaps in nuclei"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.4872","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:ed7f9129d98e9c95815da66b27a66661ddd44fbb9d687e96df548fb012390883","target":"record","created_at":"2026-05-18T01:42:16Z","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":"73252dd79afc2ef28dd8d77bba0ced398a22fcf8f29b0ff4d4cb165a54eaddf2","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2014-08-21T04:09:36Z","title_canon_sha256":"533ca2853075fa3b30b492ed7309a0dfff9cbda5f8ea1cf6d7435d5a3a490e7b"},"schema_version":"1.0","source":{"id":"1408.4872","kind":"arxiv","version":1}},"canonical_sha256":"94abccf0ab72f4e8beacb81829874162c300d459e0f9e40c5ba00b5b5169ba86","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"94abccf0ab72f4e8beacb81829874162c300d459e0f9e40c5ba00b5b5169ba86","first_computed_at":"2026-05-18T01:42:16.393290Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:42:16.393290Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fkwfDMR1EzWu6DGUXl/kMiNEWU4kTf0bFyl+nZI94OG0IWLwjUy2t2cY3VbdDd5KeD0HE9pFVwx4gCuaa0pWCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:42:16.393987Z","signed_message":"canonical_sha256_bytes"},"source_id":"1408.4872","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ed7f9129d98e9c95815da66b27a66661ddd44fbb9d687e96df548fb012390883","sha256:b8188e53175dd0ce6744ea47b9f1ad2785d62c53faa637cc797484a368ec2942"],"state_sha256":"8116be32e5d4b5e9ad5b7c06c1f8ea2d06b502f82f1dd432c14d1bf808e7a340"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TT5I59VRthpdbRVLyE69zJW557GNfAFWP5GV4q5Nx/Tqc7vI2muDeMbl6wkyLJ5uu38+sFAW9UZfB6OKq2OtDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T01:08:34.326120Z","bundle_sha256":"8b42572f2e3b4bc4515a8f7317adeac56a2b94c73bc2e225ca2390a31aeb966d"}}