{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:POVZBDPI65N6TBOSPDCGCXBHPI","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":"9b6988e343b55523c7f2c611263e28a027aa62b40a412ced0a2937da06853a7c","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2024-11-04T19:56:28Z","title_canon_sha256":"edf6d41ca281b0b1162d312ddac6fe09961c69b71dde69761b2ca41151818823"},"schema_version":"1.0","source":{"id":"2411.02565","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2411.02565","created_at":"2026-07-05T11:43:08Z"},{"alias_kind":"arxiv_version","alias_value":"2411.02565v3","created_at":"2026-07-05T11:43:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2411.02565","created_at":"2026-07-05T11:43:08Z"},{"alias_kind":"pith_short_12","alias_value":"POVZBDPI65N6","created_at":"2026-07-05T11:43:08Z"},{"alias_kind":"pith_short_16","alias_value":"POVZBDPI65N6TBOS","created_at":"2026-07-05T11:43:08Z"},{"alias_kind":"pith_short_8","alias_value":"POVZBDPI","created_at":"2026-07-05T11:43:08Z"}],"graph_snapshots":[{"event_id":"sha256:8edea73fd72bc0b209b50cca6150f0a524724fa37486af1fc537915c180ad752","target":"graph","created_at":"2026-07-05T11:43:08Z","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/2411.02565/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We demonstrate a method for radionuclide assay that is spectroscopic with 100 % counting efficiency for alpha decay. Advancing both cryogenic decay energy spectrometry (DES) and drop-on-demand inkjet metrology, a solution of Am-241 was assayed for massic activity (of order 100 kBq/g) with a relative combined standard uncertainty less than 1 %. We implement live-timed counting, spectroscopic analysis, validation by liquid scintillation (LS) counting, and confirmation of quantitative solution transfer. Experimental DES spectra are well modeled with a Monte Carlo simulation. The model was further","authors_text":"Bradley Alpert, Daniel R. Schmidt, Daniel Swetz, Denis E. Bergeron, Galen O`Neil, Gordon Shaw, Kelsey Morgan, Max Carlson, Richard Essex, R. Michael Verkouteren, Ryan P. Fitzgerald, Sean Jollota, Shin Muramoto, Svetlana Nour","cross_cats":["nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2024-11-04T19:56:28Z","title":"Primary activity measurement of an Am-241 solution using microgram inkjet gravimetry and decay energy spectrometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2411.02565","kind":"arxiv","version":3},"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":"sha256:96b0c4773c9d705eac624486f121749dca82bcf0512d13899268f6637e366529","target":"record","created_at":"2026-07-05T11:43:08Z","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":"9b6988e343b55523c7f2c611263e28a027aa62b40a412ced0a2937da06853a7c","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2024-11-04T19:56:28Z","title_canon_sha256":"edf6d41ca281b0b1162d312ddac6fe09961c69b71dde69761b2ca41151818823"},"schema_version":"1.0","source":{"id":"2411.02565","kind":"arxiv","version":3}},"canonical_sha256":"7bab908de8f75be985d278c4615c277a0a4ed0671fb758fa9ab2e919210e886c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7bab908de8f75be985d278c4615c277a0a4ed0671fb758fa9ab2e919210e886c","first_computed_at":"2026-07-05T11:43:08.049501Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:43:08.049501Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Yr3WHoeZ8j2+9dsMFXqbeUYsCl6J9oQDDdB+LN0kA7z58wWYs6kRCOeCLELxmu9uVugPaLFJXC9DUs2dF9R4DA==","signature_status":"signed_v1","signed_at":"2026-07-05T11:43:08.049968Z","signed_message":"canonical_sha256_bytes"},"source_id":"2411.02565","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:96b0c4773c9d705eac624486f121749dca82bcf0512d13899268f6637e366529","sha256:8edea73fd72bc0b209b50cca6150f0a524724fa37486af1fc537915c180ad752"],"state_sha256":"8131bf4c0502b1b7ea70fa5703e2ddb4f62bc72a4f2b600d470118b834775222"}