{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:NRRFPTYJRCLCM6VI4D6OHJ6F64","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":"b1ffb59f6f91a9f735d9c0f4b522d9c91c5c8f828c0fb299b27ba835f6dfbfda","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-11-16T08:32:40Z","title_canon_sha256":"080c963f467e40ef9b4771ca88ff68b931fc7a02c3cb7d5a41b5c2888504faf1"},"schema_version":"1.0","source":{"id":"1711.06742","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.06742","created_at":"2026-05-17T23:40:41Z"},{"alias_kind":"arxiv_version","alias_value":"1711.06742v2","created_at":"2026-05-17T23:40:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.06742","created_at":"2026-05-17T23:40:41Z"},{"alias_kind":"pith_short_12","alias_value":"NRRFPTYJRCLC","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"NRRFPTYJRCLCM6VI","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"NRRFPTYJ","created_at":"2026-05-18T12:31:34Z"}],"graph_snapshots":[{"event_id":"sha256:5abc70db0a2172940ddd01f6d3bd0a2d6fe6603a8f02598f6f91ff4f7cabe1ff","target":"graph","created_at":"2026-05-17T23:40:41Z","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 combined measurement and Monte-Carlo simulation study was carried out in order to characterize the particle self-shielding effect of B4C grains in neutron shielding concrete. Several batches of a specialized neutron shielding concrete, with varying B4C grain sizes, were exposed to a 2 {\\AA} neutron beam at the R2D2 test beamline at the Institute for Energy Technology located in Kjeller, Norway. The direct and scattered neutrons were detected with a neutron detector placed behind the concrete blocks and the results were compared to Geant4 simulations. The particle self-shielding effect was in","authors_text":"C. P. Cooper-Jensen, D. D. DiJulio, I. Llamas-Jansa, P. M. Bentley, S. Kazi","cross_cats":["nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-11-16T08:32:40Z","title":"Measurements and Monte-Carlo simulations of the particle self-shielding effect of B4C grains in neutron shielding concrete"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.06742","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":"sha256:23c34acaa4c3e45c1b07582a1368b1da1073a9ef7acdafdcb4ee31772d0e0e75","target":"record","created_at":"2026-05-17T23:40:41Z","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":"b1ffb59f6f91a9f735d9c0f4b522d9c91c5c8f828c0fb299b27ba835f6dfbfda","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-11-16T08:32:40Z","title_canon_sha256":"080c963f467e40ef9b4771ca88ff68b931fc7a02c3cb7d5a41b5c2888504faf1"},"schema_version":"1.0","source":{"id":"1711.06742","kind":"arxiv","version":2}},"canonical_sha256":"6c6257cf098896267aa8e0fce3a7c5f704a3ff431fde721213dc1de343450203","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6c6257cf098896267aa8e0fce3a7c5f704a3ff431fde721213dc1de343450203","first_computed_at":"2026-05-17T23:40:41.990952Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:40:41.990952Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"I+nDpXfzG7qDYrUhBW1T25BkXY60MDP6cCt8ZSZJTumqU4efP9PQngGpOPnk9O1GXxoy1PQIw6mu8gE41/2GBA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:40:41.991476Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.06742","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:23c34acaa4c3e45c1b07582a1368b1da1073a9ef7acdafdcb4ee31772d0e0e75","sha256:5abc70db0a2172940ddd01f6d3bd0a2d6fe6603a8f02598f6f91ff4f7cabe1ff"],"state_sha256":"713092d203fccc498cf89d192a19a8a55d9af999f13e45183db4b182985fa4ab"}