{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:VQ32U55UE4SZHQ3TSXWUIFKV7P","short_pith_number":"pith:VQ32U55U","canonical_record":{"source":{"id":"1508.04504","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2015-08-19T02:32:55Z","cross_cats_sorted":[],"title_canon_sha256":"8fe08ef68950fbf59f6a3204259744206864d26bee1dfb40a106662dec709567","abstract_canon_sha256":"d6d2ca33f7b3301e59bfb23ace9a1275b20233421a439ea7054549acce0309d9"},"schema_version":"1.0"},"canonical_sha256":"ac37aa77b4272593c37395ed441555fbdd3b1012a24bfcc046467683f76f9303","source":{"kind":"arxiv","id":"1508.04504","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.04504","created_at":"2026-05-18T01:28:46Z"},{"alias_kind":"arxiv_version","alias_value":"1508.04504v1","created_at":"2026-05-18T01:28:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.04504","created_at":"2026-05-18T01:28:46Z"},{"alias_kind":"pith_short_12","alias_value":"VQ32U55UE4SZ","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"VQ32U55UE4SZHQ3T","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"VQ32U55U","created_at":"2026-05-18T12:29:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:VQ32U55UE4SZHQ3TSXWUIFKV7P","target":"record","payload":{"canonical_record":{"source":{"id":"1508.04504","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2015-08-19T02:32:55Z","cross_cats_sorted":[],"title_canon_sha256":"8fe08ef68950fbf59f6a3204259744206864d26bee1dfb40a106662dec709567","abstract_canon_sha256":"d6d2ca33f7b3301e59bfb23ace9a1275b20233421a439ea7054549acce0309d9"},"schema_version":"1.0"},"canonical_sha256":"ac37aa77b4272593c37395ed441555fbdd3b1012a24bfcc046467683f76f9303","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:28:46.862558Z","signature_b64":"RDImfpclMvPHgCadCelKd/bOxm1AByPyC+TZXnFb9lwKzW+KsxNGbiPWqoJvHwoSZgq94YvySvXtWVykxS7cBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ac37aa77b4272593c37395ed441555fbdd3b1012a24bfcc046467683f76f9303","last_reissued_at":"2026-05-18T01:28:46.861944Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:28:46.861944Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1508.04504","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":"2026-05-18T01:28:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YIfpIb/WDNMPbatAD9A1Rcqg/nMq9i0mgG2juf3RJo4lAkBsjT5jNVLQj7/L/ldcCQu2WIRSukKIGvPcQ+6rDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T03:39:36.205732Z"},"content_sha256":"e2d2609fe735aed5117db415baca38435a9a6eb40e8ca760f707e50627fe4fd1","schema_version":"1.0","event_id":"sha256:e2d2609fe735aed5117db415baca38435a9a6eb40e8ca760f707e50627fe4fd1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:VQ32U55UE4SZHQ3TSXWUIFKV7P","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Impact of pion dynamics on nuclear shell structure","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-th","authors_text":"Elena Litvinova","submitted_at":"2015-08-19T02:32:55Z","abstract_excerpt":"Spin-isospin response in exotic nuclear systems is investigated. It is found that in some nuclei excitations with pionic quantum numbers (0-, 1+, 2-, ...) appear at very low energies with large transition probabilities, which is an indication of the vicinity of the onset of pion condensation. As an example, 2- components of the spin-dipole resonance in 78-Ni and 132-Sn are considered. The existence of such modes points out to the necessity of taking into account their coupling to other elementary modes of excitation, e.g. single-quasiparticle ones. This coupling is introduced in the theory for"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.04504","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":"2026-05-18T01:28:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S5JqKiqLVaAOInJIUuwEMLfQYHwNBeL8mrWjtmn3pmBXvHDYpljoPQNw+9EqNP4xtJCLW5ZfWTQuXqjLaJeHAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T03:39:36.206067Z"},"content_sha256":"f3a9c1be7d8b1238567c2b62446ca289ace272c51e42ae985451dc6428bb4c52","schema_version":"1.0","event_id":"sha256:f3a9c1be7d8b1238567c2b62446ca289ace272c51e42ae985451dc6428bb4c52"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VQ32U55UE4SZHQ3TSXWUIFKV7P/bundle.json","state_url":"https://pith.science/pith/VQ32U55UE4SZHQ3TSXWUIFKV7P/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VQ32U55UE4SZHQ3TSXWUIFKV7P/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":"2026-06-02T03:39:36Z","links":{"resolver":"https://pith.science/pith/VQ32U55UE4SZHQ3TSXWUIFKV7P","bundle":"https://pith.science/pith/VQ32U55UE4SZHQ3TSXWUIFKV7P/bundle.json","state":"https://pith.science/pith/VQ32U55UE4SZHQ3TSXWUIFKV7P/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VQ32U55UE4SZHQ3TSXWUIFKV7P/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:VQ32U55UE4SZHQ3TSXWUIFKV7P","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":"d6d2ca33f7b3301e59bfb23ace9a1275b20233421a439ea7054549acce0309d9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2015-08-19T02:32:55Z","title_canon_sha256":"8fe08ef68950fbf59f6a3204259744206864d26bee1dfb40a106662dec709567"},"schema_version":"1.0","source":{"id":"1508.04504","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.04504","created_at":"2026-05-18T01:28:46Z"},{"alias_kind":"arxiv_version","alias_value":"1508.04504v1","created_at":"2026-05-18T01:28:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.04504","created_at":"2026-05-18T01:28:46Z"},{"alias_kind":"pith_short_12","alias_value":"VQ32U55UE4SZ","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"VQ32U55UE4SZHQ3T","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"VQ32U55U","created_at":"2026-05-18T12:29:47Z"}],"graph_snapshots":[{"event_id":"sha256:f3a9c1be7d8b1238567c2b62446ca289ace272c51e42ae985451dc6428bb4c52","target":"graph","created_at":"2026-05-18T01:28:46Z","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":"Spin-isospin response in exotic nuclear systems is investigated. It is found that in some nuclei excitations with pionic quantum numbers (0-, 1+, 2-, ...) appear at very low energies with large transition probabilities, which is an indication of the vicinity of the onset of pion condensation. As an example, 2- components of the spin-dipole resonance in 78-Ni and 132-Sn are considered. The existence of such modes points out to the necessity of taking into account their coupling to other elementary modes of excitation, e.g. single-quasiparticle ones. This coupling is introduced in the theory for","authors_text":"Elena Litvinova","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2015-08-19T02:32:55Z","title":"Impact of pion dynamics on nuclear shell structure"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.04504","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:e2d2609fe735aed5117db415baca38435a9a6eb40e8ca760f707e50627fe4fd1","target":"record","created_at":"2026-05-18T01:28:46Z","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":"d6d2ca33f7b3301e59bfb23ace9a1275b20233421a439ea7054549acce0309d9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2015-08-19T02:32:55Z","title_canon_sha256":"8fe08ef68950fbf59f6a3204259744206864d26bee1dfb40a106662dec709567"},"schema_version":"1.0","source":{"id":"1508.04504","kind":"arxiv","version":1}},"canonical_sha256":"ac37aa77b4272593c37395ed441555fbdd3b1012a24bfcc046467683f76f9303","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ac37aa77b4272593c37395ed441555fbdd3b1012a24bfcc046467683f76f9303","first_computed_at":"2026-05-18T01:28:46.861944Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:28:46.861944Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RDImfpclMvPHgCadCelKd/bOxm1AByPyC+TZXnFb9lwKzW+KsxNGbiPWqoJvHwoSZgq94YvySvXtWVykxS7cBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:28:46.862558Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.04504","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e2d2609fe735aed5117db415baca38435a9a6eb40e8ca760f707e50627fe4fd1","sha256:f3a9c1be7d8b1238567c2b62446ca289ace272c51e42ae985451dc6428bb4c52"],"state_sha256":"92a5f03c16de5f10798ed3bc2bdcabe617724358f240f27e8b780c3bd09e4b86"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uZQIQsYFxYEF/CM/Vz/jD5Hk473rOPAzGZ7B1I+oFRd72kYcLs2gckLmGztabxxwqrVhFd267H8lAYwsEzZkCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T03:39:36.208131Z","bundle_sha256":"116963bd28f376347547e865d8cbab4680f55c5023b74e8624aaeebe4ae7ef21"}}