{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:Z5EXDS4DDRKW7RNEQJPBVUP7OT","short_pith_number":"pith:Z5EXDS4D","canonical_record":{"source":{"id":"1809.03556","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-09-10T19:20:58Z","cross_cats_sorted":[],"title_canon_sha256":"2ab0257fcdb7c949a70cc65b50aaa034492f477606f3b1d34cd4e0791d658ce0","abstract_canon_sha256":"c3b5d074a21fadb8d5671f6a671fb4265bc4d13e8a2b9d838c61dff84f99a6af"},"schema_version":"1.0"},"canonical_sha256":"cf4971cb831c556fc5a4825e1ad1ff74c535882a088f7863c65ebcfd678ac3d3","source":{"kind":"arxiv","id":"1809.03556","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.03556","created_at":"2026-05-17T23:45:36Z"},{"alias_kind":"arxiv_version","alias_value":"1809.03556v2","created_at":"2026-05-17T23:45:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.03556","created_at":"2026-05-17T23:45:36Z"},{"alias_kind":"pith_short_12","alias_value":"Z5EXDS4DDRKW","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_16","alias_value":"Z5EXDS4DDRKW7RNE","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_8","alias_value":"Z5EXDS4D","created_at":"2026-05-18T12:33:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:Z5EXDS4DDRKW7RNEQJPBVUP7OT","target":"record","payload":{"canonical_record":{"source":{"id":"1809.03556","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-09-10T19:20:58Z","cross_cats_sorted":[],"title_canon_sha256":"2ab0257fcdb7c949a70cc65b50aaa034492f477606f3b1d34cd4e0791d658ce0","abstract_canon_sha256":"c3b5d074a21fadb8d5671f6a671fb4265bc4d13e8a2b9d838c61dff84f99a6af"},"schema_version":"1.0"},"canonical_sha256":"cf4971cb831c556fc5a4825e1ad1ff74c535882a088f7863c65ebcfd678ac3d3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:45:36.748284Z","signature_b64":"xUKCr3RBw0mLkWzPmp7HDA2b88OWwP55tXZz8SoMFQlymiNplBrsVX7YOp6W5QTHm1Qs7fM/1lO3MIdUZTYJCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cf4971cb831c556fc5a4825e1ad1ff74c535882a088f7863c65ebcfd678ac3d3","last_reissued_at":"2026-05-17T23:45:36.747791Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:45:36.747791Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1809.03556","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:45:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rZw96hiy+lGS+egjtFvIg81AKKfqu1o2BC/5VAlog5HZXU4N8r1Vs9OPkxZFyVoIQNGXhTL6TrGceCsTex4hBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T12:18:40.430573Z"},"content_sha256":"cba79cd70306acd1e473fc992ac980734ae5465e7f9a02300310ee305bf791e5","schema_version":"1.0","event_id":"sha256:cba79cd70306acd1e473fc992ac980734ae5465e7f9a02300310ee305bf791e5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:Z5EXDS4DDRKW7RNEQJPBVUP7OT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantification challenges for atom probe tomography of hydrogen and deuterium in Zircaloy-4","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Agnieszka Szczepaniak, Andrew J. Breen, Baptiste Gault, Dierk Raabe, Isabelle Mouton, Leigh T. Stephenson, M. Herbig, Paraskevas Kontis, Siyang Wang, T. Ben Britton, Yanhong Chang","submitted_at":"2018-09-10T19:20:58Z","abstract_excerpt":"Analysis and understanding of the role of hydrogen in metals is a significant challenge for the future of materials science, and this is a clear objective of recent work in the atom probe tomography (APT) community. Isotopic marking by deuteration has often been proposed as the preferred route to enable quantification of hydrogen by APT. Zircaloy-4 was charged electrochemically with hydrogen and deuterium under the same conditions to form large hydrides and deuterides. Our results from a Zr hydride and a Zr deuteride highlight challenges associated to accurate quantification of hydrogen and de"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.03556","kind":"arxiv","version":2},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:45:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sMzZwpba+DDPvm2MqREZHI/uPN48vhZy3mPSC5y9ptIHOh4PeF8X7yIezpzxoUAarvWRt2n91WzfA2qJnl3OAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T12:18:40.431168Z"},"content_sha256":"81dc1b724d4733295a20fd22a8ade39dd423e50abf8f971e70a893690f03cd11","schema_version":"1.0","event_id":"sha256:81dc1b724d4733295a20fd22a8ade39dd423e50abf8f971e70a893690f03cd11"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Z5EXDS4DDRKW7RNEQJPBVUP7OT/bundle.json","state_url":"https://pith.science/pith/Z5EXDS4DDRKW7RNEQJPBVUP7OT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Z5EXDS4DDRKW7RNEQJPBVUP7OT/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-26T12:18:40Z","links":{"resolver":"https://pith.science/pith/Z5EXDS4DDRKW7RNEQJPBVUP7OT","bundle":"https://pith.science/pith/Z5EXDS4DDRKW7RNEQJPBVUP7OT/bundle.json","state":"https://pith.science/pith/Z5EXDS4DDRKW7RNEQJPBVUP7OT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Z5EXDS4DDRKW7RNEQJPBVUP7OT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:Z5EXDS4DDRKW7RNEQJPBVUP7OT","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":"c3b5d074a21fadb8d5671f6a671fb4265bc4d13e8a2b9d838c61dff84f99a6af","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-09-10T19:20:58Z","title_canon_sha256":"2ab0257fcdb7c949a70cc65b50aaa034492f477606f3b1d34cd4e0791d658ce0"},"schema_version":"1.0","source":{"id":"1809.03556","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.03556","created_at":"2026-05-17T23:45:36Z"},{"alias_kind":"arxiv_version","alias_value":"1809.03556v2","created_at":"2026-05-17T23:45:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.03556","created_at":"2026-05-17T23:45:36Z"},{"alias_kind":"pith_short_12","alias_value":"Z5EXDS4DDRKW","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_16","alias_value":"Z5EXDS4DDRKW7RNE","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_8","alias_value":"Z5EXDS4D","created_at":"2026-05-18T12:33:04Z"}],"graph_snapshots":[{"event_id":"sha256:81dc1b724d4733295a20fd22a8ade39dd423e50abf8f971e70a893690f03cd11","target":"graph","created_at":"2026-05-17T23:45:36Z","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":"Analysis and understanding of the role of hydrogen in metals is a significant challenge for the future of materials science, and this is a clear objective of recent work in the atom probe tomography (APT) community. Isotopic marking by deuteration has often been proposed as the preferred route to enable quantification of hydrogen by APT. Zircaloy-4 was charged electrochemically with hydrogen and deuterium under the same conditions to form large hydrides and deuterides. Our results from a Zr hydride and a Zr deuteride highlight challenges associated to accurate quantification of hydrogen and de","authors_text":"Agnieszka Szczepaniak, Andrew J. Breen, Baptiste Gault, Dierk Raabe, Isabelle Mouton, Leigh T. Stephenson, M. Herbig, Paraskevas Kontis, Siyang Wang, T. Ben Britton, Yanhong Chang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-09-10T19:20:58Z","title":"Quantification challenges for atom probe tomography of hydrogen and deuterium in Zircaloy-4"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.03556","kind":"arxiv","version":2},"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:cba79cd70306acd1e473fc992ac980734ae5465e7f9a02300310ee305bf791e5","target":"record","created_at":"2026-05-17T23:45:36Z","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":"c3b5d074a21fadb8d5671f6a671fb4265bc4d13e8a2b9d838c61dff84f99a6af","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-09-10T19:20:58Z","title_canon_sha256":"2ab0257fcdb7c949a70cc65b50aaa034492f477606f3b1d34cd4e0791d658ce0"},"schema_version":"1.0","source":{"id":"1809.03556","kind":"arxiv","version":2}},"canonical_sha256":"cf4971cb831c556fc5a4825e1ad1ff74c535882a088f7863c65ebcfd678ac3d3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cf4971cb831c556fc5a4825e1ad1ff74c535882a088f7863c65ebcfd678ac3d3","first_computed_at":"2026-05-17T23:45:36.747791Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:45:36.747791Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xUKCr3RBw0mLkWzPmp7HDA2b88OWwP55tXZz8SoMFQlymiNplBrsVX7YOp6W5QTHm1Qs7fM/1lO3MIdUZTYJCQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:45:36.748284Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.03556","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cba79cd70306acd1e473fc992ac980734ae5465e7f9a02300310ee305bf791e5","sha256:81dc1b724d4733295a20fd22a8ade39dd423e50abf8f971e70a893690f03cd11"],"state_sha256":"7ca1f882d1a1042b5d69fd9df7ef4cb6bbbe47f0c78ba571b1934c054a882aaf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h4DdRdgViyJv4K0Gs9+k3zAZ5LUj2OLXL6LavezoLh2aEjq9VPXJLILiYcnVgNHtERByaL7aGiM/tCRGoChKBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T12:18:40.434945Z","bundle_sha256":"7bc4cc020b2f8c62d09e1d04487ae5685b0fc5486e73d2cc56808859a4a9ae48"}}