{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:X7A2SUBWEUWB6SMJ227DS7LB73","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":"02d55a5080f65eb1bd441dd2be5853b984b79140ce68e40e53ca746a71ca0416","cross_cats_sorted":["physics.soc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-10-05T20:08:22Z","title_canon_sha256":"41a382a1e7eb7ed5a77d3f057a624dc818d926fcf2a485fbde458fc5176ec73e"},"schema_version":"1.0","source":{"id":"1210.1858","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.1858","created_at":"2026-05-18T03:43:51Z"},{"alias_kind":"arxiv_version","alias_value":"1210.1858v1","created_at":"2026-05-18T03:43:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.1858","created_at":"2026-05-18T03:43:51Z"},{"alias_kind":"pith_short_12","alias_value":"X7A2SUBWEUWB","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"X7A2SUBWEUWB6SMJ","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"X7A2SUBW","created_at":"2026-05-18T12:27:27Z"}],"graph_snapshots":[{"event_id":"sha256:32d5090ab29c04e8afb92ab59859b349b687c9f270df0176d7aeef531b88de4f","target":"graph","created_at":"2026-05-18T03:43:51Z","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":"This paper explores the use of cosmic ray muons to image the contents of shielded containers and detect high-Z special nuclear materials inside them. Cosmic ray muons are a naturally occurring form of radiation, are highly penetrating and exhibit large scattering angles on high Z materials. Specifically, we investigated how radiographic and tomographic techniques can be effective for non-invasive nuclear waste characterization and for nuclear material accountancy of spent fuel inside dry storage containers. We show that the tracking of individual muons, as they enter and exit a structure, can ","authors_text":"C. Jewett, G. Jonkmans, M. Thompson, V. N. P. Anghel","cross_cats":["physics.soc-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-10-05T20:08:22Z","title":"Nuclear Waste Imaging and Spent Fuel Verification by Muon Tomography"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.1858","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":"sha256:8b108f546feedfdcefbc2047ebb0d7008a29211ec04812edf6c1a88cd81eba27","target":"record","created_at":"2026-05-18T03:43:51Z","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":"02d55a5080f65eb1bd441dd2be5853b984b79140ce68e40e53ca746a71ca0416","cross_cats_sorted":["physics.soc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-10-05T20:08:22Z","title_canon_sha256":"41a382a1e7eb7ed5a77d3f057a624dc818d926fcf2a485fbde458fc5176ec73e"},"schema_version":"1.0","source":{"id":"1210.1858","kind":"arxiv","version":1}},"canonical_sha256":"bfc1a95036252c1f4989d6be397d61fecb97cbd5bea69f375ec61c619af6dd99","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bfc1a95036252c1f4989d6be397d61fecb97cbd5bea69f375ec61c619af6dd99","first_computed_at":"2026-05-18T03:43:51.714072Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:43:51.714072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TpkGZRgdvR2ScUjOTTDPhWV+ZKZEsN5MTIbcrWeT+TNVFqd8qjQRTleJ/53/kGJ1a21omD2MpIKOOqjXob+/DA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:43:51.714519Z","signed_message":"canonical_sha256_bytes"},"source_id":"1210.1858","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8b108f546feedfdcefbc2047ebb0d7008a29211ec04812edf6c1a88cd81eba27","sha256:32d5090ab29c04e8afb92ab59859b349b687c9f270df0176d7aeef531b88de4f"],"state_sha256":"ac940ecc392b07a5c641deecc01d1d1dbd1eec86ea7f18929594f62b006795d4"}