{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:MLDKXFOT7OYPH2KJZVFDZ7NKRN","short_pith_number":"pith:MLDKXFOT","canonical_record":{"source":{"id":"1801.09668","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2018-01-29T18:53:37Z","cross_cats_sorted":[],"title_canon_sha256":"df743d1bd68eb81d7743a1edc6a953e79931c483a5916d0ad5902fcba0f5f17a","abstract_canon_sha256":"55f4e1a2d7a1fcd290fc2516c66ff1d5b1b50b15273cc3899443dd2e40169266"},"schema_version":"1.0"},"canonical_sha256":"62c6ab95d3fbb0f3e949cd4a3cfdaa8b4d6c73651601994dd8aa924069e3673f","source":{"kind":"arxiv","id":"1801.09668","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.09668","created_at":"2026-05-18T00:22:22Z"},{"alias_kind":"arxiv_version","alias_value":"1801.09668v1","created_at":"2026-05-18T00:22:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.09668","created_at":"2026-05-18T00:22:22Z"},{"alias_kind":"pith_short_12","alias_value":"MLDKXFOT7OYP","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"MLDKXFOT7OYPH2KJ","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"MLDKXFOT","created_at":"2026-05-18T12:32:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:MLDKXFOT7OYPH2KJZVFDZ7NKRN","target":"record","payload":{"canonical_record":{"source":{"id":"1801.09668","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2018-01-29T18:53:37Z","cross_cats_sorted":[],"title_canon_sha256":"df743d1bd68eb81d7743a1edc6a953e79931c483a5916d0ad5902fcba0f5f17a","abstract_canon_sha256":"55f4e1a2d7a1fcd290fc2516c66ff1d5b1b50b15273cc3899443dd2e40169266"},"schema_version":"1.0"},"canonical_sha256":"62c6ab95d3fbb0f3e949cd4a3cfdaa8b4d6c73651601994dd8aa924069e3673f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:22:22.844114Z","signature_b64":"QiZgotXjbo83XO5BNkPNV8MgEp0tuz0SF3MlaMkYHRRIOCeMnm+OkyZeQxYV0A98Sbx57NUqyUzcqTXiupkSCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"62c6ab95d3fbb0f3e949cd4a3cfdaa8b4d6c73651601994dd8aa924069e3673f","last_reissued_at":"2026-05-18T00:22:22.843537Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:22:22.843537Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1801.09668","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":"2026-05-18T00:22:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VZnhkHxvBIY8AbRj6RrpW68sWHiWEKjvPy3pQsaGcgExyqGpb+voYIl4mfPYuvthqQC87XC0vFj+LqJhZcspDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T06:38:31.509456Z"},"content_sha256":"bed459f53260d304afbe951cd013280b5bf1afc0a4a2ec41cc3fa59db1d74307","schema_version":"1.0","event_id":"sha256:bed459f53260d304afbe951cd013280b5bf1afc0a4a2ec41cc3fa59db1d74307"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:MLDKXFOT7OYPH2KJZVFDZ7NKRN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Understanding the Low-Energy Enhancement of the $\\gamma$-ray Strength Function of $^{56}$Fe","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A.C. Larsen, A.D. Ayangeakaa, A. G\\\"orgen, A.O. Macchiavelli, A.V. Voinov, A. Wiens, C.M. Campbell, D.G. Sarantites, D.L. Bleuel, H.L. Crawford, H.M. Davids, I.Y. Lee, J.E. Kinnison, J. Elson, L.A. Bernstein, L. Kirsch, M. Cromaz, M.D. Jones, M. Guttormsen, M.P. Carpenter, M. Salathe, M. Wiedeking, P. Fallon, R.M. Clark, R.V.F. Janssens, S. Bottoni, S. Siem, S. Zhu, T. Lauritsen, W. Reviol","submitted_at":"2018-01-29T18:53:37Z","abstract_excerpt":"A model-independent technique was used to determine the $\\gamma$-ray Strength Function ($\\gamma$SF) of $^{56}$Fe down to $\\gamma$-ray energies less than 1 MeV for the first time with GRETINA using the $(p,p')$ reaction at 16 MeV. No difference was observed in the energy dependence of the $\\gamma$SF built on $2^{+}$ and $4^{+}$ final states, supporting the Brink hypothesis. In addition, angular distribution and polarization measurements were performed. The angular distributions are consistent with dipole radiation. The polarization results show a small bias towards magnetic character in the reg"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.09668","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":"2026-05-18T00:22:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3oEZimmr6NVJuDh/3JXZ+RTp8qRDN3iDPTl+Yev9GrgwHK+YQnwCj++Qc1aolBnKQi8HYrgM8IfNeud3CXHlCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T06:38:31.509820Z"},"content_sha256":"45ad18c819c45a56515e1501ace367928a90fef71350ecc749fbd7dbe2d7fd97","schema_version":"1.0","event_id":"sha256:45ad18c819c45a56515e1501ace367928a90fef71350ecc749fbd7dbe2d7fd97"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MLDKXFOT7OYPH2KJZVFDZ7NKRN/bundle.json","state_url":"https://pith.science/pith/MLDKXFOT7OYPH2KJZVFDZ7NKRN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MLDKXFOT7OYPH2KJZVFDZ7NKRN/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":"2026-05-25T06:38:31Z","links":{"resolver":"https://pith.science/pith/MLDKXFOT7OYPH2KJZVFDZ7NKRN","bundle":"https://pith.science/pith/MLDKXFOT7OYPH2KJZVFDZ7NKRN/bundle.json","state":"https://pith.science/pith/MLDKXFOT7OYPH2KJZVFDZ7NKRN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MLDKXFOT7OYPH2KJZVFDZ7NKRN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:MLDKXFOT7OYPH2KJZVFDZ7NKRN","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":"55f4e1a2d7a1fcd290fc2516c66ff1d5b1b50b15273cc3899443dd2e40169266","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2018-01-29T18:53:37Z","title_canon_sha256":"df743d1bd68eb81d7743a1edc6a953e79931c483a5916d0ad5902fcba0f5f17a"},"schema_version":"1.0","source":{"id":"1801.09668","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.09668","created_at":"2026-05-18T00:22:22Z"},{"alias_kind":"arxiv_version","alias_value":"1801.09668v1","created_at":"2026-05-18T00:22:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.09668","created_at":"2026-05-18T00:22:22Z"},{"alias_kind":"pith_short_12","alias_value":"MLDKXFOT7OYP","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"MLDKXFOT7OYPH2KJ","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"MLDKXFOT","created_at":"2026-05-18T12:32:37Z"}],"graph_snapshots":[{"event_id":"sha256:45ad18c819c45a56515e1501ace367928a90fef71350ecc749fbd7dbe2d7fd97","target":"graph","created_at":"2026-05-18T00:22:22Z","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":"A model-independent technique was used to determine the $\\gamma$-ray Strength Function ($\\gamma$SF) of $^{56}$Fe down to $\\gamma$-ray energies less than 1 MeV for the first time with GRETINA using the $(p,p')$ reaction at 16 MeV. No difference was observed in the energy dependence of the $\\gamma$SF built on $2^{+}$ and $4^{+}$ final states, supporting the Brink hypothesis. In addition, angular distribution and polarization measurements were performed. The angular distributions are consistent with dipole radiation. The polarization results show a small bias towards magnetic character in the reg","authors_text":"A.C. Larsen, A.D. Ayangeakaa, A. G\\\"orgen, A.O. Macchiavelli, A.V. Voinov, A. Wiens, C.M. Campbell, D.G. Sarantites, D.L. Bleuel, H.L. Crawford, H.M. Davids, I.Y. Lee, J.E. Kinnison, J. Elson, L.A. Bernstein, L. Kirsch, M. Cromaz, M.D. Jones, M. Guttormsen, M.P. Carpenter, M. Salathe, M. Wiedeking, P. Fallon, R.M. Clark, R.V.F. Janssens, S. Bottoni, S. Siem, S. Zhu, T. Lauritsen, W. Reviol","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2018-01-29T18:53:37Z","title":"Understanding the Low-Energy Enhancement of the $\\gamma$-ray Strength Function of $^{56}$Fe"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.09668","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:bed459f53260d304afbe951cd013280b5bf1afc0a4a2ec41cc3fa59db1d74307","target":"record","created_at":"2026-05-18T00:22:22Z","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":"55f4e1a2d7a1fcd290fc2516c66ff1d5b1b50b15273cc3899443dd2e40169266","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2018-01-29T18:53:37Z","title_canon_sha256":"df743d1bd68eb81d7743a1edc6a953e79931c483a5916d0ad5902fcba0f5f17a"},"schema_version":"1.0","source":{"id":"1801.09668","kind":"arxiv","version":1}},"canonical_sha256":"62c6ab95d3fbb0f3e949cd4a3cfdaa8b4d6c73651601994dd8aa924069e3673f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"62c6ab95d3fbb0f3e949cd4a3cfdaa8b4d6c73651601994dd8aa924069e3673f","first_computed_at":"2026-05-18T00:22:22.843537Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:22:22.843537Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QiZgotXjbo83XO5BNkPNV8MgEp0tuz0SF3MlaMkYHRRIOCeMnm+OkyZeQxYV0A98Sbx57NUqyUzcqTXiupkSCw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:22:22.844114Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.09668","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bed459f53260d304afbe951cd013280b5bf1afc0a4a2ec41cc3fa59db1d74307","sha256:45ad18c819c45a56515e1501ace367928a90fef71350ecc749fbd7dbe2d7fd97"],"state_sha256":"a6c50fa02e5d0a47d5068ccd1964709c029798a2783d3a66635fc6fffc8f751b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"36nDq2TEtsCXngZbKoxXKOjnICEcwcOKISvlG4ft0EutMMv/wniZ7ziBZwrJAb+EQuZuiRuCtUX+QPDuhkHMAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T06:38:31.511972Z","bundle_sha256":"cd3e228322c8024c79aa37a33fe58f0d1310845b6669458adfca1fad9ccca789"}}