{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:IVA6KRUEHROFOJYSANKIIW7TL7","short_pith_number":"pith:IVA6KRUE","schema_version":"1.0","canonical_sha256":"4541e546843c5c5727120354845bf35fd2d4a552b939fe50c331ac9c44da55b7","source":{"kind":"arxiv","id":"1503.07346","version":1},"attestation_state":"computed","paper":{"title":"Optimising the neutron environment of Radiation Portal Monitors: a computational optimisation study","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-th"],"primary_cat":"physics.ins-det","authors_text":"Lee W. Packer, Mark R. Gilbert, Zamir Ghani","submitted_at":"2015-03-25T11:42:05Z","abstract_excerpt":"Efficient and reliable detection of radiological or nuclear threats is a crucial part of national and international efforts to prevent terrorist activities. Radiation Portal Monitors (RPMs), which are deployed worldwide, are intended to interdict smuggled fissile material by detecting emissions of neutrons and gamma rays. However, considering the range and variety of threat sources, vehicular and shielding scenarios, and that only a small signature is present, it is important that the design of the RPMs allows these signatures to be accurately differentiated from the environmental background. "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1503.07346","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-03-25T11:42:05Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"9a208d96be1713a6aa74bfb26f547d820a6dfa828d72e7298adf9103127e65b5","abstract_canon_sha256":"9dddd6710852e3f62e3920bff41687ad8cc92cbcfd19c843522308f5a2380b38"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:25:01.264299Z","signature_b64":"y8DLI/JhTUC+zrUknMcraXpCy0+2b8k79gw+2sHVU/pG7hMaJTTeDBoQgOmF+2+5FBRxYF1hIpRN1AMHxtiOAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4541e546843c5c5727120354845bf35fd2d4a552b939fe50c331ac9c44da55b7","last_reissued_at":"2026-05-18T01:25:01.263574Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:25:01.263574Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Optimising the neutron environment of Radiation Portal Monitors: a computational optimisation study","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-th"],"primary_cat":"physics.ins-det","authors_text":"Lee W. Packer, Mark R. Gilbert, Zamir Ghani","submitted_at":"2015-03-25T11:42:05Z","abstract_excerpt":"Efficient and reliable detection of radiological or nuclear threats is a crucial part of national and international efforts to prevent terrorist activities. Radiation Portal Monitors (RPMs), which are deployed worldwide, are intended to interdict smuggled fissile material by detecting emissions of neutrons and gamma rays. However, considering the range and variety of threat sources, vehicular and shielding scenarios, and that only a small signature is present, it is important that the design of the RPMs allows these signatures to be accurately differentiated from the environmental background. "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.07346","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1503.07346","created_at":"2026-05-18T01:25:01.263672+00:00"},{"alias_kind":"arxiv_version","alias_value":"1503.07346v1","created_at":"2026-05-18T01:25:01.263672+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.07346","created_at":"2026-05-18T01:25:01.263672+00:00"},{"alias_kind":"pith_short_12","alias_value":"IVA6KRUEHROF","created_at":"2026-05-18T12:29:25.134429+00:00"},{"alias_kind":"pith_short_16","alias_value":"IVA6KRUEHROFOJYS","created_at":"2026-05-18T12:29:25.134429+00:00"},{"alias_kind":"pith_short_8","alias_value":"IVA6KRUE","created_at":"2026-05-18T12:29:25.134429+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/IVA6KRUEHROFOJYSANKIIW7TL7","json":"https://pith.science/pith/IVA6KRUEHROFOJYSANKIIW7TL7.json","graph_json":"https://pith.science/api/pith-number/IVA6KRUEHROFOJYSANKIIW7TL7/graph.json","events_json":"https://pith.science/api/pith-number/IVA6KRUEHROFOJYSANKIIW7TL7/events.json","paper":"https://pith.science/paper/IVA6KRUE"},"agent_actions":{"view_html":"https://pith.science/pith/IVA6KRUEHROFOJYSANKIIW7TL7","download_json":"https://pith.science/pith/IVA6KRUEHROFOJYSANKIIW7TL7.json","view_paper":"https://pith.science/paper/IVA6KRUE","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1503.07346&json=true","fetch_graph":"https://pith.science/api/pith-number/IVA6KRUEHROFOJYSANKIIW7TL7/graph.json","fetch_events":"https://pith.science/api/pith-number/IVA6KRUEHROFOJYSANKIIW7TL7/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/IVA6KRUEHROFOJYSANKIIW7TL7/action/timestamp_anchor","attest_storage":"https://pith.science/pith/IVA6KRUEHROFOJYSANKIIW7TL7/action/storage_attestation","attest_author":"https://pith.science/pith/IVA6KRUEHROFOJYSANKIIW7TL7/action/author_attestation","sign_citation":"https://pith.science/pith/IVA6KRUEHROFOJYSANKIIW7TL7/action/citation_signature","submit_replication":"https://pith.science/pith/IVA6KRUEHROFOJYSANKIIW7TL7/action/replication_record"}},"created_at":"2026-05-18T01:25:01.263672+00:00","updated_at":"2026-05-18T01:25:01.263672+00:00"}