{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:3FJCII7QG4DKTJFLWTF2NQBITS","short_pith_number":"pith:3FJCII7Q","canonical_record":{"source":{"id":"1804.00814","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2018-04-03T04:02:32Z","cross_cats_sorted":[],"title_canon_sha256":"96d4f9efde4641f267216cfa7f41b71c6a237fdc81c520fc26db470417b51f3b","abstract_canon_sha256":"f37cf25d9a5b45bb4a7dc263b304a02ec96f19a28baf42ddf0a6428d9f665336"},"schema_version":"1.0"},"canonical_sha256":"d9522423f03706a9a4abb4cba6c0289cbc072d0705ba3e6f3ad7100c553779cc","source":{"kind":"arxiv","id":"1804.00814","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.00814","created_at":"2026-05-18T00:18:10Z"},{"alias_kind":"arxiv_version","alias_value":"1804.00814v1","created_at":"2026-05-18T00:18:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.00814","created_at":"2026-05-18T00:18:10Z"},{"alias_kind":"pith_short_12","alias_value":"3FJCII7QG4DK","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"3FJCII7QG4DKTJFL","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"3FJCII7Q","created_at":"2026-05-18T12:32:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:3FJCII7QG4DKTJFLWTF2NQBITS","target":"record","payload":{"canonical_record":{"source":{"id":"1804.00814","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2018-04-03T04:02:32Z","cross_cats_sorted":[],"title_canon_sha256":"96d4f9efde4641f267216cfa7f41b71c6a237fdc81c520fc26db470417b51f3b","abstract_canon_sha256":"f37cf25d9a5b45bb4a7dc263b304a02ec96f19a28baf42ddf0a6428d9f665336"},"schema_version":"1.0"},"canonical_sha256":"d9522423f03706a9a4abb4cba6c0289cbc072d0705ba3e6f3ad7100c553779cc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:18:10.387216Z","signature_b64":"jSoFIwzxqr1zXNq5xJ/jGDyRaUWw+RUjsep4a7ov5hUIc/0epgGZa1/JH6iJskuCa2GZefsph3Zwcy4o3jIdBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d9522423f03706a9a4abb4cba6c0289cbc072d0705ba3e6f3ad7100c553779cc","last_reissued_at":"2026-05-18T00:18:10.386708Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:18:10.386708Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.00814","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":"2026-05-18T00:18:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bETwJXwMohkmm0Qwhu8JYhquVXq0IGa63HEr4M3rvK+iAHHqPIG+AE8YEnY2BpmdTwYfymxLDn2dYBilxToRBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T22:53:53.921760Z"},"content_sha256":"85f03257be00ad5ffb79121cac309dfc6454d119e6e0ddd4835e4e3ec9ef318b","schema_version":"1.0","event_id":"sha256:85f03257be00ad5ffb79121cac309dfc6454d119e6e0ddd4835e4e3ec9ef318b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:3FJCII7QG4DKTJFLWTF2NQBITS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Experimental signature of collective enhancement in nuclear level density","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. De, Balaram Dey, Debasish Mondal, Deepak Pandit, K. Banerjee, Pratap Roy, S. Mukhopadhyay, S. R. Banerjee, Srijit Bhattacharya, Surajit Pal","submitted_at":"2018-04-03T04:02:32Z","abstract_excerpt":"We present a probable experimental signature of collective enhancement in the nuclear level density (NLD) by measuring the neutron and the giant dipole resonance (GDR) $\\gamma$ rays emitted from the rare earth $^{169}$Tm compound nucleus populated at 26.1 MeV excitation energy. An enhanced yield is observed in both neutron and $\\gamma$ ray spectra corresponding to the same excitation energy in the daughter nuclei. The enhancement could only be reproduced by including a collective enhancement factor in the Fermi gas model of NLD to explain the neutron and GDR spectra simultaneously. The experim"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.00814","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":"2026-05-18T00:18:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g/Xvr1iB7B/Hf7R5NodU3/hBuUnOTm+Tsq50lYgw15OM6zKhQmQNP7wKZRRX1wjVRXZ5TAMaFIDEqkgPX/o8Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T22:53:53.922453Z"},"content_sha256":"95266ff5fb2891bc0ea3f0d4e775f23b3f0bb19a0f3905fdc4bfa7cb6cb7c635","schema_version":"1.0","event_id":"sha256:95266ff5fb2891bc0ea3f0d4e775f23b3f0bb19a0f3905fdc4bfa7cb6cb7c635"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3FJCII7QG4DKTJFLWTF2NQBITS/bundle.json","state_url":"https://pith.science/pith/3FJCII7QG4DKTJFLWTF2NQBITS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3FJCII7QG4DKTJFLWTF2NQBITS/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":"2026-05-28T22:53:53Z","links":{"resolver":"https://pith.science/pith/3FJCII7QG4DKTJFLWTF2NQBITS","bundle":"https://pith.science/pith/3FJCII7QG4DKTJFLWTF2NQBITS/bundle.json","state":"https://pith.science/pith/3FJCII7QG4DKTJFLWTF2NQBITS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3FJCII7QG4DKTJFLWTF2NQBITS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:3FJCII7QG4DKTJFLWTF2NQBITS","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":"f37cf25d9a5b45bb4a7dc263b304a02ec96f19a28baf42ddf0a6428d9f665336","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2018-04-03T04:02:32Z","title_canon_sha256":"96d4f9efde4641f267216cfa7f41b71c6a237fdc81c520fc26db470417b51f3b"},"schema_version":"1.0","source":{"id":"1804.00814","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.00814","created_at":"2026-05-18T00:18:10Z"},{"alias_kind":"arxiv_version","alias_value":"1804.00814v1","created_at":"2026-05-18T00:18:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.00814","created_at":"2026-05-18T00:18:10Z"},{"alias_kind":"pith_short_12","alias_value":"3FJCII7QG4DK","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"3FJCII7QG4DKTJFL","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"3FJCII7Q","created_at":"2026-05-18T12:32:02Z"}],"graph_snapshots":[{"event_id":"sha256:95266ff5fb2891bc0ea3f0d4e775f23b3f0bb19a0f3905fdc4bfa7cb6cb7c635","target":"graph","created_at":"2026-05-18T00:18:10Z","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":"We present a probable experimental signature of collective enhancement in the nuclear level density (NLD) by measuring the neutron and the giant dipole resonance (GDR) $\\gamma$ rays emitted from the rare earth $^{169}$Tm compound nucleus populated at 26.1 MeV excitation energy. An enhanced yield is observed in both neutron and $\\gamma$ ray spectra corresponding to the same excitation energy in the daughter nuclei. The enhancement could only be reproduced by including a collective enhancement factor in the Fermi gas model of NLD to explain the neutron and GDR spectra simultaneously. The experim","authors_text":"A. De, Balaram Dey, Debasish Mondal, Deepak Pandit, K. Banerjee, Pratap Roy, S. Mukhopadhyay, S. R. Banerjee, Srijit Bhattacharya, Surajit Pal","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2018-04-03T04:02:32Z","title":"Experimental signature of collective enhancement in nuclear level density"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.00814","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":"sha256:85f03257be00ad5ffb79121cac309dfc6454d119e6e0ddd4835e4e3ec9ef318b","target":"record","created_at":"2026-05-18T00:18:10Z","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":"f37cf25d9a5b45bb4a7dc263b304a02ec96f19a28baf42ddf0a6428d9f665336","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2018-04-03T04:02:32Z","title_canon_sha256":"96d4f9efde4641f267216cfa7f41b71c6a237fdc81c520fc26db470417b51f3b"},"schema_version":"1.0","source":{"id":"1804.00814","kind":"arxiv","version":1}},"canonical_sha256":"d9522423f03706a9a4abb4cba6c0289cbc072d0705ba3e6f3ad7100c553779cc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d9522423f03706a9a4abb4cba6c0289cbc072d0705ba3e6f3ad7100c553779cc","first_computed_at":"2026-05-18T00:18:10.386708Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:18:10.386708Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jSoFIwzxqr1zXNq5xJ/jGDyRaUWw+RUjsep4a7ov5hUIc/0epgGZa1/JH6iJskuCa2GZefsph3Zwcy4o3jIdBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:18:10.387216Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.00814","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:85f03257be00ad5ffb79121cac309dfc6454d119e6e0ddd4835e4e3ec9ef318b","sha256:95266ff5fb2891bc0ea3f0d4e775f23b3f0bb19a0f3905fdc4bfa7cb6cb7c635"],"state_sha256":"6392678f9deda84530aa443ca1e9d3afce04cae0fe81cbef292f70fc78ec3f5f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Sr2yn7sXWf1eKMW9CqWpEfj1OMJr8yqql0OQiUlJX3MmvgX5aXq5IAzaqaBrEH1rtJc+2sjDLtIOROVSXjxkBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T22:53:53.926203Z","bundle_sha256":"0e40e02516cc02c7b948d0a2fba6f59f9a540c517afa34f0e3f72ba61648fe47"}}