{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:XINCBTZTYZKNHXUGEQ53IKVC37","short_pith_number":"pith:XINCBTZT","schema_version":"1.0","canonical_sha256":"ba1a20cf33c654d3de86243bb42aa2dff8e9f34bb41eb2d04a8182c171d38142","source":{"kind":"arxiv","id":"1708.09476","version":4},"attestation_state":"computed","paper":{"title":"Radon Daughter Plate-out Measurements at SNOLAB for Polyethylene and Copper","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Ben Loer, Dan Bauer, Jodi Cooley, Matthew Stein, Ray Bunker, Rob Calkins, Silvia Scorza","submitted_at":"2017-08-30T21:16:17Z","abstract_excerpt":"Polyethylene and copper samples were exposed to the underground air at SNOLAB for approximately three months while several environmental factors were monitored. Predictions of the radon-daughter plate-out rate are compared to the resulting surface activities, obtained from high-sensitivity measurements of alpha emissivity using the XIA UltraLo-1800 spectrometer at SMU. From these measurements, we determine an average $^{210}$Pb plate-out rate of 249 and 423 atoms/day/cm$^{2}$ for polyethylene and copper, respectively, when exposed to radon activity of 135 Bq/m$^{3}$ at SNOLAB. A time-dependent"},"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":"1708.09476","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-08-30T21:16:17Z","cross_cats_sorted":[],"title_canon_sha256":"1788d66315ce3d3a3b682fd4eca1dd1f4ce545c0fc250a9ff5e294cb6ccc4d3a","abstract_canon_sha256":"02cbf9e0fbf64fa2a60ebd7e311b92550e84a56dc3fa9fd3aa66e2d6bc5994f6"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:30:41.629893Z","signature_b64":"bcDDI45ytKCP4S7ewA3xu6OM/Zfyv4sBPBUl5jHLA2ui8fvSHJpHjDWumddPyzvpsXKCySYbVswDp8Am8l4IBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ba1a20cf33c654d3de86243bb42aa2dff8e9f34bb41eb2d04a8182c171d38142","last_reissued_at":"2026-05-18T00:30:41.629552Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:30:41.629552Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Radon Daughter Plate-out Measurements at SNOLAB for Polyethylene and Copper","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Ben Loer, Dan Bauer, Jodi Cooley, Matthew Stein, Ray Bunker, Rob Calkins, Silvia Scorza","submitted_at":"2017-08-30T21:16:17Z","abstract_excerpt":"Polyethylene and copper samples were exposed to the underground air at SNOLAB for approximately three months while several environmental factors were monitored. Predictions of the radon-daughter plate-out rate are compared to the resulting surface activities, obtained from high-sensitivity measurements of alpha emissivity using the XIA UltraLo-1800 spectrometer at SMU. From these measurements, we determine an average $^{210}$Pb plate-out rate of 249 and 423 atoms/day/cm$^{2}$ for polyethylene and copper, respectively, when exposed to radon activity of 135 Bq/m$^{3}$ at SNOLAB. A time-dependent"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.09476","kind":"arxiv","version":4},"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":"1708.09476","created_at":"2026-05-18T00:30:41.629606+00:00"},{"alias_kind":"arxiv_version","alias_value":"1708.09476v4","created_at":"2026-05-18T00:30:41.629606+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.09476","created_at":"2026-05-18T00:30:41.629606+00:00"},{"alias_kind":"pith_short_12","alias_value":"XINCBTZTYZKN","created_at":"2026-05-18T12:31:53.515858+00:00"},{"alias_kind":"pith_short_16","alias_value":"XINCBTZTYZKNHXUG","created_at":"2026-05-18T12:31:53.515858+00:00"},{"alias_kind":"pith_short_8","alias_value":"XINCBTZT","created_at":"2026-05-18T12:31:53.515858+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/XINCBTZTYZKNHXUGEQ53IKVC37","json":"https://pith.science/pith/XINCBTZTYZKNHXUGEQ53IKVC37.json","graph_json":"https://pith.science/api/pith-number/XINCBTZTYZKNHXUGEQ53IKVC37/graph.json","events_json":"https://pith.science/api/pith-number/XINCBTZTYZKNHXUGEQ53IKVC37/events.json","paper":"https://pith.science/paper/XINCBTZT"},"agent_actions":{"view_html":"https://pith.science/pith/XINCBTZTYZKNHXUGEQ53IKVC37","download_json":"https://pith.science/pith/XINCBTZTYZKNHXUGEQ53IKVC37.json","view_paper":"https://pith.science/paper/XINCBTZT","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1708.09476&json=true","fetch_graph":"https://pith.science/api/pith-number/XINCBTZTYZKNHXUGEQ53IKVC37/graph.json","fetch_events":"https://pith.science/api/pith-number/XINCBTZTYZKNHXUGEQ53IKVC37/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/XINCBTZTYZKNHXUGEQ53IKVC37/action/timestamp_anchor","attest_storage":"https://pith.science/pith/XINCBTZTYZKNHXUGEQ53IKVC37/action/storage_attestation","attest_author":"https://pith.science/pith/XINCBTZTYZKNHXUGEQ53IKVC37/action/author_attestation","sign_citation":"https://pith.science/pith/XINCBTZTYZKNHXUGEQ53IKVC37/action/citation_signature","submit_replication":"https://pith.science/pith/XINCBTZTYZKNHXUGEQ53IKVC37/action/replication_record"}},"created_at":"2026-05-18T00:30:41.629606+00:00","updated_at":"2026-05-18T00:30:41.629606+00:00"}