{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:P3UMO3KPABC2JRDHTT2PVTKASS","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":"8a259fc21fc2a9fd893981018efdc11cd1c50e901a8d45694cb44d3ce440811d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2019-06-10T22:29:56Z","title_canon_sha256":"f5be2e9c1f5b1830dac6ebbffc333b0cf27f3ea0bbf694d6f831d241aeefb3cc"},"schema_version":"1.0","source":{"id":"1906.04305","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.04305","created_at":"2026-07-05T00:28:49Z"},{"alias_kind":"arxiv_version","alias_value":"1906.04305v2","created_at":"2026-07-05T00:28:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.04305","created_at":"2026-07-05T00:28:49Z"},{"alias_kind":"pith_short_12","alias_value":"P3UMO3KPABC2","created_at":"2026-07-05T00:28:49Z"},{"alias_kind":"pith_short_16","alias_value":"P3UMO3KPABC2JRDH","created_at":"2026-07-05T00:28:49Z"},{"alias_kind":"pith_short_8","alias_value":"P3UMO3KP","created_at":"2026-07-05T00:28:49Z"}],"graph_snapshots":[{"event_id":"sha256:d862d22360d258b998f4228c3486395a9ab3c83bdfe2fb768296726c0a7d0028","target":"graph","created_at":"2026-07-05T00:28:49Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1906.04305/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The average prompt-fission-neutron multiplicity $\\bar{\\nu}$ is of significance in the areas of nuclear theory, nuclear nonproliferation, and nuclear energy. In this work, the surrogate-reaction method has been used for the first time to indirectly determine $\\bar{\\nu}$ for $^{239}$Pu($n$,$f$) via $^{240}$Pu($\\alpha$,$\\alpha^{\\prime}f$) reactions. A $^{240}$Pu target was bombarded with a beam of 53.9-MeV $\\alpha$ particles. Scattered $\\alpha$ particles, fission products, and neutrons were measured with the NeutronSTARS detector array. Values of $\\bar{\\nu}$ were obtained for a continuous range o","authors_text":"A. Saastamoinen, B. S. Wang, E. B. Norman, J. D. Koglin, J. T. Burke, K. Kolos, O. A. Akindele, R. J. Casperson, R. O. Hughes, S. Ota","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2019-06-10T22:29:56Z","title":"Determining the average prompt-fission-neutron multiplicity for $^{239}$Pu($n$,$f$) via a $^{240}$Pu($\\alpha$,$\\alpha^{\\prime}f$) surrogate reaction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.04305","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:dfdcd5c9398e03a50c03880ac64b5a0203bfe17182f96d0e6871da1c3a2107f3","target":"record","created_at":"2026-07-05T00:28:49Z","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":"8a259fc21fc2a9fd893981018efdc11cd1c50e901a8d45694cb44d3ce440811d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2019-06-10T22:29:56Z","title_canon_sha256":"f5be2e9c1f5b1830dac6ebbffc333b0cf27f3ea0bbf694d6f831d241aeefb3cc"},"schema_version":"1.0","source":{"id":"1906.04305","kind":"arxiv","version":2}},"canonical_sha256":"7ee8c76d4f0045a4c4679cf4facd4094bb64869bc300f5dc57cf76ea388aa14f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7ee8c76d4f0045a4c4679cf4facd4094bb64869bc300f5dc57cf76ea388aa14f","first_computed_at":"2026-07-05T00:28:49.315687Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:28:49.315687Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JJUCffs1mhnfHvBhrGH7BqknbI93HsC5q42hfNgsOQlkyDcR3t62CcRCtDS6xF8wVGB5otk+xU42BAfyrsBICA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:28:49.316121Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.04305","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dfdcd5c9398e03a50c03880ac64b5a0203bfe17182f96d0e6871da1c3a2107f3","sha256:d862d22360d258b998f4228c3486395a9ab3c83bdfe2fb768296726c0a7d0028"],"state_sha256":"fe023884b02fda2eda427294de8aa76de97908e94a3f2f5ef792e6e554e24241"}