{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:5LZIUJM2GJ5MQPJLBWGMUGSB46","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":"6ade3e8fc49452ad53c0ab16a610b7c5245e7473b8b76675e0477b2e0f925bf8","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2024-05-08T09:13:13Z","title_canon_sha256":"cee6b2a94ee8cdf77241d8db0e9c3f9a9b86b68c8fba06584a3a1c7e21779eda"},"schema_version":"1.0","source":{"id":"2405.04901","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2405.04901","created_at":"2026-07-05T08:31:50Z"},{"alias_kind":"arxiv_version","alias_value":"2405.04901v1","created_at":"2026-07-05T08:31:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2405.04901","created_at":"2026-07-05T08:31:50Z"},{"alias_kind":"pith_short_12","alias_value":"5LZIUJM2GJ5M","created_at":"2026-07-05T08:31:50Z"},{"alias_kind":"pith_short_16","alias_value":"5LZIUJM2GJ5MQPJL","created_at":"2026-07-05T08:31:50Z"},{"alias_kind":"pith_short_8","alias_value":"5LZIUJM2","created_at":"2026-07-05T08:31:50Z"}],"graph_snapshots":[{"event_id":"sha256:9fca019fb13f2e8e23cfab24bed6787c0720c6211453c449024397d17bfed87d","target":"graph","created_at":"2026-07-05T08:31:50Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2405.04901/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We have established a method to measure picograms-per-gram (pg g$^{-1}$) levels of $^{238}$U and $^{232}$Th in scintillation films by combining the dry ashing method and inductively coupled plasma mass spectrometry. Trace amounts of $^{238}$U and $^{232}$Th were measured in up to 2~g of the scintillation film with almost 100% collection efficiency. This paper details the experimental procedure, including the pretreatment of the samples and labware, detection limit of the method, collection efficiencies of $^{238}$U and $^{232}$Th, and measurement of $^{238}$U and $^{232}$Th in a polyethylene n","authors_text":"A. Sakaguchi, H. Ikeda, K. Chiba, K. Ichimura, K. Nemoto, M. Kurasawa, Y. Gando, Y. Kishimoto, Y. Sakakieda, Y. Takaku","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2024-05-08T09:13:13Z","title":"Development of a method to measure trace level of uranium and thorium in scintillation films"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2405.04901","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:eff64b6522f6e35737822626152edb019f945158045189abef4c7d13a7df548f","target":"record","created_at":"2026-07-05T08:31:50Z","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":"6ade3e8fc49452ad53c0ab16a610b7c5245e7473b8b76675e0477b2e0f925bf8","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2024-05-08T09:13:13Z","title_canon_sha256":"cee6b2a94ee8cdf77241d8db0e9c3f9a9b86b68c8fba06584a3a1c7e21779eda"},"schema_version":"1.0","source":{"id":"2405.04901","kind":"arxiv","version":1}},"canonical_sha256":"eaf28a259a327ac83d2b0d8cca1a41e7966e1ee7af2710532eb442a67fee1184","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eaf28a259a327ac83d2b0d8cca1a41e7966e1ee7af2710532eb442a67fee1184","first_computed_at":"2026-07-05T08:31:50.955480Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:31:50.955480Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ioE1Izq/k/h9lJ9xMFCfemMwv2VOL/7JufK9vvU7ILHB74BGX64O79SUpgmvwDNM6sxz/+df94V1YufGdaaTDw==","signature_status":"signed_v1","signed_at":"2026-07-05T08:31:50.955971Z","signed_message":"canonical_sha256_bytes"},"source_id":"2405.04901","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eff64b6522f6e35737822626152edb019f945158045189abef4c7d13a7df548f","sha256:9fca019fb13f2e8e23cfab24bed6787c0720c6211453c449024397d17bfed87d"],"state_sha256":"8d0563414a20cc689d2efa0d96f1357eb08cadba7106d69ebd40b6d224086532"}