{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:ACP34J32MOZGV4KXSR374U273N","short_pith_number":"pith:ACP34J32","schema_version":"1.0","canonical_sha256":"009fbe277a63b26af1579477fe535fdb65e21c8a40b3e25665edee5f2bb4aeed","source":{"kind":"arxiv","id":"1512.06494","version":1},"attestation_state":"computed","paper":{"title":"Assay methods for U-238, Th-232, and Pb-210 in lead and calibration of Bi-210 bremsstrahlung emission from lead","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"Allan W. Myers, Brian D. Glasgow, Cory T. Overman, Craig E. Aalseth, Eric W. Hoppe, Isaac J. Arnquist, John L. Orrell, Kimbrelle S. Thommasson, Martin E. Keillor, Sarah M. Shaff, Shannon M. Morley, Tere A. Eggemeyer","submitted_at":"2015-12-21T05:02:33Z","abstract_excerpt":"Assay methods for measuring 238U, 232Th, and 210Pb concentrations in refined lead are presented. The 238U and 232Th concentrations are determined using isotope dilution inductively coupled plasma mass spectrometry (ID-ICP-MS) after anion exchange column separation of dissolved lead samples. The 210Pb concentration is inferred through {\\alpha}-spectroscopy of a daughter isotope, 210Po, after chemical precipitation separation on dissolved lead samples. Subsequent to the 210Po {\\alpha}-spectroscopy assay, a method for evaluating 210Pb concentrations in solid lead samples was developed via measure"},"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":"1512.06494","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-12-21T05:02:33Z","cross_cats_sorted":[],"title_canon_sha256":"9566ee12adf64ccdcc1d2548eebe47571c69c5f0fefe89a509a2bb02ee864d19","abstract_canon_sha256":"3a96270d9d8a7cbadbba782d5c12eb9bb8859dc707c9cd4d833e4e5b77818949"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:52:34.442078Z","signature_b64":"t4AosaQT7YNSVxh5RbVVQD0bnkhV5eS+31IKrgFnJkYyXzYJzxcVnQG1hMz7EDFGkEqLogvvVh6lgsj0TVLICQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"009fbe277a63b26af1579477fe535fdb65e21c8a40b3e25665edee5f2bb4aeed","last_reissued_at":"2026-05-18T00:52:34.441639Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:52:34.441639Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Assay methods for U-238, Th-232, and Pb-210 in lead and calibration of Bi-210 bremsstrahlung emission from lead","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"Allan W. Myers, Brian D. Glasgow, Cory T. Overman, Craig E. Aalseth, Eric W. Hoppe, Isaac J. Arnquist, John L. Orrell, Kimbrelle S. Thommasson, Martin E. Keillor, Sarah M. Shaff, Shannon M. Morley, Tere A. Eggemeyer","submitted_at":"2015-12-21T05:02:33Z","abstract_excerpt":"Assay methods for measuring 238U, 232Th, and 210Pb concentrations in refined lead are presented. The 238U and 232Th concentrations are determined using isotope dilution inductively coupled plasma mass spectrometry (ID-ICP-MS) after anion exchange column separation of dissolved lead samples. The 210Pb concentration is inferred through {\\alpha}-spectroscopy of a daughter isotope, 210Po, after chemical precipitation separation on dissolved lead samples. Subsequent to the 210Po {\\alpha}-spectroscopy assay, a method for evaluating 210Pb concentrations in solid lead samples was developed via measure"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.06494","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":"1512.06494","created_at":"2026-05-18T00:52:34.441714+00:00"},{"alias_kind":"arxiv_version","alias_value":"1512.06494v1","created_at":"2026-05-18T00:52:34.441714+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.06494","created_at":"2026-05-18T00:52:34.441714+00:00"},{"alias_kind":"pith_short_12","alias_value":"ACP34J32MOZG","created_at":"2026-05-18T12:29:10.953037+00:00"},{"alias_kind":"pith_short_16","alias_value":"ACP34J32MOZGV4KX","created_at":"2026-05-18T12:29:10.953037+00:00"},{"alias_kind":"pith_short_8","alias_value":"ACP34J32","created_at":"2026-05-18T12:29:10.953037+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/ACP34J32MOZGV4KXSR374U273N","json":"https://pith.science/pith/ACP34J32MOZGV4KXSR374U273N.json","graph_json":"https://pith.science/api/pith-number/ACP34J32MOZGV4KXSR374U273N/graph.json","events_json":"https://pith.science/api/pith-number/ACP34J32MOZGV4KXSR374U273N/events.json","paper":"https://pith.science/paper/ACP34J32"},"agent_actions":{"view_html":"https://pith.science/pith/ACP34J32MOZGV4KXSR374U273N","download_json":"https://pith.science/pith/ACP34J32MOZGV4KXSR374U273N.json","view_paper":"https://pith.science/paper/ACP34J32","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1512.06494&json=true","fetch_graph":"https://pith.science/api/pith-number/ACP34J32MOZGV4KXSR374U273N/graph.json","fetch_events":"https://pith.science/api/pith-number/ACP34J32MOZGV4KXSR374U273N/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ACP34J32MOZGV4KXSR374U273N/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ACP34J32MOZGV4KXSR374U273N/action/storage_attestation","attest_author":"https://pith.science/pith/ACP34J32MOZGV4KXSR374U273N/action/author_attestation","sign_citation":"https://pith.science/pith/ACP34J32MOZGV4KXSR374U273N/action/citation_signature","submit_replication":"https://pith.science/pith/ACP34J32MOZGV4KXSR374U273N/action/replication_record"}},"created_at":"2026-05-18T00:52:34.441714+00:00","updated_at":"2026-05-18T00:52:34.441714+00:00"}