{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:U44TZUFNOOPNGHS2JM5VBC7P2A","short_pith_number":"pith:U44TZUFN","canonical_record":{"source":{"id":"1003.5720","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2010-03-30T02:33:00Z","cross_cats_sorted":[],"title_canon_sha256":"0c3755b7ca06c5e28b1b202372ade7eef20e5abab601cea84c501231525c6527","abstract_canon_sha256":"08e84cf6ead5059fe3796253a3023a0208ab25c927d5d525846f4fe2e2fa3d18"},"schema_version":"1.0"},"canonical_sha256":"a7393cd0ad739ed31e5a4b3b508befd016199d1031951c9758af9495278a1018","source":{"kind":"arxiv","id":"1003.5720","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1003.5720","created_at":"2026-05-18T02:33:40Z"},{"alias_kind":"arxiv_version","alias_value":"1003.5720v2","created_at":"2026-05-18T02:33:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1003.5720","created_at":"2026-05-18T02:33:40Z"},{"alias_kind":"pith_short_12","alias_value":"U44TZUFNOOPN","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"U44TZUFNOOPNGHS2","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"U44TZUFN","created_at":"2026-05-18T12:26:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:U44TZUFNOOPNGHS2JM5VBC7P2A","target":"record","payload":{"canonical_record":{"source":{"id":"1003.5720","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2010-03-30T02:33:00Z","cross_cats_sorted":[],"title_canon_sha256":"0c3755b7ca06c5e28b1b202372ade7eef20e5abab601cea84c501231525c6527","abstract_canon_sha256":"08e84cf6ead5059fe3796253a3023a0208ab25c927d5d525846f4fe2e2fa3d18"},"schema_version":"1.0"},"canonical_sha256":"a7393cd0ad739ed31e5a4b3b508befd016199d1031951c9758af9495278a1018","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:33:40.064785Z","signature_b64":"wtu6Ge8MVsnvqanvqVj7Zqnr6++vV8ZS3O3FcuAhw9IJ0uT8QpGr3OH4A6pUCtzGuNS7k3vuw2rTCLVm7ItZCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a7393cd0ad739ed31e5a4b3b508befd016199d1031951c9758af9495278a1018","last_reissued_at":"2026-05-18T02:33:40.064292Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:33:40.064292Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1003.5720","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:33:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"diTXC18wQXecV3LYuyW0Pa9nt4sSiThc3r0WFKL/mye9QkATB1fVfl2wX1aoLfW/EL851Eq1MjQtIlGFFOO0Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T18:36:02.925153Z"},"content_sha256":"dbbecc4b33f6245b097a11f02387865f0ac8fef49e709c5c13fc3745c68259ab","schema_version":"1.0","event_id":"sha256:dbbecc4b33f6245b097a11f02387865f0ac8fef49e709c5c13fc3745c68259ab"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:U44TZUFNOOPNGHS2JM5VBC7P2A","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Shell structure in neutron-rich Ca and Ni nuclei under semi-realistic mean fields","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-th","authors_text":"H. Nakada","submitted_at":"2010-03-30T02:33:00Z","abstract_excerpt":"Shell structure in the neutron-rich Ca and Ni nuclei is investigated by the spherical Hartree-Fock calculations with the semi-realistic $NN$ interactions. Specific ingredients of the effective interaction, particularly the tensor force, often play a key role in the $Z$ dependence of the neutron shell structure. Such examples are found in N=32 and N=40; N=32 becomes magic or submagic in $^{52}$Ca while its magicity is broken in $^{60}$Ni, and N=40 is submagic (though not magic) in $^{68}$Ni but not in $^{60}$Ca. Comments are given on the doubly magic nature of $^{78}$Ni. We point out that the l"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1003.5720","kind":"arxiv","version":2},"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":"2026-05-18T02:33:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hSBJxZQxffho2WcWVOXBZS0XyoHfQl1Uc/5U7A7PDF2mkvLyJhAtIPt26+coaRcDWvKmioz4LNK926y/XDa4Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T18:36:02.925407Z"},"content_sha256":"867af6ab59f8be83e5d48ff68b7944a571c9b16fbf34ef1fbe968703536d6c14","schema_version":"1.0","event_id":"sha256:867af6ab59f8be83e5d48ff68b7944a571c9b16fbf34ef1fbe968703536d6c14"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/U44TZUFNOOPNGHS2JM5VBC7P2A/bundle.json","state_url":"https://pith.science/pith/U44TZUFNOOPNGHS2JM5VBC7P2A/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/U44TZUFNOOPNGHS2JM5VBC7P2A/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":"2026-07-31T18:36:02Z","links":{"resolver":"https://pith.science/pith/U44TZUFNOOPNGHS2JM5VBC7P2A","bundle":"https://pith.science/pith/U44TZUFNOOPNGHS2JM5VBC7P2A/bundle.json","state":"https://pith.science/pith/U44TZUFNOOPNGHS2JM5VBC7P2A/state.json","well_known_bundle":"https://pith.science/.well-known/pith/U44TZUFNOOPNGHS2JM5VBC7P2A/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:U44TZUFNOOPNGHS2JM5VBC7P2A","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":"08e84cf6ead5059fe3796253a3023a0208ab25c927d5d525846f4fe2e2fa3d18","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2010-03-30T02:33:00Z","title_canon_sha256":"0c3755b7ca06c5e28b1b202372ade7eef20e5abab601cea84c501231525c6527"},"schema_version":"1.0","source":{"id":"1003.5720","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1003.5720","created_at":"2026-05-18T02:33:40Z"},{"alias_kind":"arxiv_version","alias_value":"1003.5720v2","created_at":"2026-05-18T02:33:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1003.5720","created_at":"2026-05-18T02:33:40Z"},{"alias_kind":"pith_short_12","alias_value":"U44TZUFNOOPN","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"U44TZUFNOOPNGHS2","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"U44TZUFN","created_at":"2026-05-18T12:26:15Z"}],"graph_snapshots":[{"event_id":"sha256:867af6ab59f8be83e5d48ff68b7944a571c9b16fbf34ef1fbe968703536d6c14","target":"graph","created_at":"2026-05-18T02:33:40Z","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":"Shell structure in the neutron-rich Ca and Ni nuclei is investigated by the spherical Hartree-Fock calculations with the semi-realistic $NN$ interactions. Specific ingredients of the effective interaction, particularly the tensor force, often play a key role in the $Z$ dependence of the neutron shell structure. Such examples are found in N=32 and N=40; N=32 becomes magic or submagic in $^{52}$Ca while its magicity is broken in $^{60}$Ni, and N=40 is submagic (though not magic) in $^{68}$Ni but not in $^{60}$Ca. Comments are given on the doubly magic nature of $^{78}$Ni. We point out that the l","authors_text":"H. Nakada","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2010-03-30T02:33:00Z","title":"Shell structure in neutron-rich Ca and Ni nuclei under semi-realistic mean fields"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1003.5720","kind":"arxiv","version":2},"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:dbbecc4b33f6245b097a11f02387865f0ac8fef49e709c5c13fc3745c68259ab","target":"record","created_at":"2026-05-18T02:33:40Z","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":"08e84cf6ead5059fe3796253a3023a0208ab25c927d5d525846f4fe2e2fa3d18","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2010-03-30T02:33:00Z","title_canon_sha256":"0c3755b7ca06c5e28b1b202372ade7eef20e5abab601cea84c501231525c6527"},"schema_version":"1.0","source":{"id":"1003.5720","kind":"arxiv","version":2}},"canonical_sha256":"a7393cd0ad739ed31e5a4b3b508befd016199d1031951c9758af9495278a1018","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a7393cd0ad739ed31e5a4b3b508befd016199d1031951c9758af9495278a1018","first_computed_at":"2026-05-18T02:33:40.064292Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:33:40.064292Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wtu6Ge8MVsnvqanvqVj7Zqnr6++vV8ZS3O3FcuAhw9IJ0uT8QpGr3OH4A6pUCtzGuNS7k3vuw2rTCLVm7ItZCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:33:40.064785Z","signed_message":"canonical_sha256_bytes"},"source_id":"1003.5720","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dbbecc4b33f6245b097a11f02387865f0ac8fef49e709c5c13fc3745c68259ab","sha256:867af6ab59f8be83e5d48ff68b7944a571c9b16fbf34ef1fbe968703536d6c14"],"state_sha256":"73f84f9d4a6fb24c05c0427115a07a9b87b93f88064570f4c0803acf7cb25ac2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vVFn9I0d8fMzvLsjdIE9GNhoxoz/wRfRipWu204kX1V7FocDitvy8piBX2gMmmQnT2wLxe0CzNAo1tufcpKKAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-31T18:36:02.927749Z","bundle_sha256":"655b8ccb44c73e7e49d6dac4632794d33d58e5d12c5cb8060137c0f87ed283c1"}}