{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:FZ2KUP7I5U447FD7VW73VTC4KD","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":"a49dabe66d49956cc7fe597ecff23e40eefe86de2f9def56b54d0cb80f51e9c9","cross_cats_sorted":["cond-mat.mtrl-sci","nucl-ex","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-05-18T02:06:47Z","title_canon_sha256":"03243218742ee583ff68f655d5c30b72594d81d3fd5d0095c84721d7b546e925"},"schema_version":"1.0","source":{"id":"1705.07738","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.07738","created_at":"2026-05-18T00:31:06Z"},{"alias_kind":"arxiv_version","alias_value":"1705.07738v1","created_at":"2026-05-18T00:31:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.07738","created_at":"2026-05-18T00:31:06Z"},{"alias_kind":"pith_short_12","alias_value":"FZ2KUP7I5U44","created_at":"2026-05-18T12:31:15Z"},{"alias_kind":"pith_short_16","alias_value":"FZ2KUP7I5U447FD7","created_at":"2026-05-18T12:31:15Z"},{"alias_kind":"pith_short_8","alias_value":"FZ2KUP7I","created_at":"2026-05-18T12:31:15Z"}],"graph_snapshots":[{"event_id":"sha256:fc00be08f1a9280a75d86bb75b0d071c6325293a48ad73f3e6e753a550794e2a","target":"graph","created_at":"2026-05-18T00:31:06Z","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 test common fluence diagnostics in the regime of very low burnup natural uranium reactor samples. The fluence diagnostics considered are the uranium isotopics ratios $^{235}$U/$^{238}$U and $^{236}$U/$^{235}$U, for which we find simple analytic formulas agree well with full reactor simulation predictions. Both ratios agree reasonably well with one another for fluences in the mid $10^{19}\\,\\mathrm{n/cm^2}$ range. However, below about $10^{19}\\,\\mathrm{n/cm^2}$ the concentrations of $^{236}$U are found to be sufficiently low that the measured $^{236}$U/$^{235}$U ratios become unreliable. We a","authors_text":"Angela Olson, Anna Hayes, Benjamin Byerly, Donivan Porterfield, Gerard Jungman, Jamie Doyle, Lav Tandon, Patrick Jaffke, Steven Myers","cross_cats":["cond-mat.mtrl-sci","nucl-ex","nucl-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-05-18T02:06:47Z","title":"Developing diagnostic tools for low-burnup reactor samples"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.07738","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":"sha256:145b9ab393505a53b9d1d950a3e1eb04b457d9ea4a595e24ae99ae66fcbf4020","target":"record","created_at":"2026-05-18T00:31:06Z","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":"a49dabe66d49956cc7fe597ecff23e40eefe86de2f9def56b54d0cb80f51e9c9","cross_cats_sorted":["cond-mat.mtrl-sci","nucl-ex","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-05-18T02:06:47Z","title_canon_sha256":"03243218742ee583ff68f655d5c30b72594d81d3fd5d0095c84721d7b546e925"},"schema_version":"1.0","source":{"id":"1705.07738","kind":"arxiv","version":1}},"canonical_sha256":"2e74aa3fe8ed39cf947fadbfbacc5c50c44ee72417e04f520d9e3a8c1260902d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2e74aa3fe8ed39cf947fadbfbacc5c50c44ee72417e04f520d9e3a8c1260902d","first_computed_at":"2026-05-18T00:31:06.868022Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:31:06.868022Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VNzuwmjLgpJBjHiKiBwHQ1sjJ/oWwdoEj2reiEZ+J42t2WbLGdmRYZmqEaQogKlVtUoFbKoCokoyy6GaUGVjDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:31:06.868671Z","signed_message":"canonical_sha256_bytes"},"source_id":"1705.07738","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:145b9ab393505a53b9d1d950a3e1eb04b457d9ea4a595e24ae99ae66fcbf4020","sha256:fc00be08f1a9280a75d86bb75b0d071c6325293a48ad73f3e6e753a550794e2a"],"state_sha256":"c7c9ddc91136e97d42fb16e9997f50acd0bc7a3e23b1e383d7b44cedc55af64d"}