{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:URKBBYWB6PAFN2EBQLPXBFYGEW","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":"4a821628506e16a00840406db838c61c89bd5b19a1a1a3730bde2ab84e2206de","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-12-14T13:34:31Z","title_canon_sha256":"269f6c8ca913269f7f299b36f2415ca1c56d8abe1ca7431d8d5ef6be45605abf"},"schema_version":"1.0","source":{"id":"1412.4356","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.4356","created_at":"2026-05-18T00:41:58Z"},{"alias_kind":"arxiv_version","alias_value":"1412.4356v1","created_at":"2026-05-18T00:41:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.4356","created_at":"2026-05-18T00:41:58Z"},{"alias_kind":"pith_short_12","alias_value":"URKBBYWB6PAF","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"URKBBYWB6PAFN2EB","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"URKBBYWB","created_at":"2026-05-18T12:28:52Z"}],"graph_snapshots":[{"event_id":"sha256:23c3607909c8771acdd8d123247cf4e57656ebada91383f92bf98b983af0b3e3","target":"graph","created_at":"2026-05-18T00:41:58Z","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":"Combination of neutron and X-ray reflectometry was used to study the vertical structure of 100 nm-thin copper films with implanted oxygen ions of energy E = [10-30] keV and doses D=[0.2-5.4]x$10^{16}$ $cm^{-2}$. The study shows that oxygen ion implantation with an energy of E = 30 keV leads to the formation of a 3 nm thick layer on the surface. Density and copper/oxygen stoichiometry of the observed surface layer are close to $Cu_2O$ oxide. We attribute the $Cu_2O$ oxide formation to highly mobilized copper atoms generated by stimulated ion implantation.","authors_text":"A. Csik, A. G. Guglya, D. Yu. Khaidukova, Kh. R. Kazdayev, O. Soltwedel, T. Acart\\\"urk, T. Keller, U. Starke, Yu. A. Marchenko, Yu. N. Khaydukov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-12-14T13:34:31Z","title":"X-ray and neutron reflectometry study of copper surface reconstruction caused by implantation of high-energy oxygen ions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.4356","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:e90fc1860b15676d2878b8a5598facdb3c4666a08efcfd7184dafcac6a9e824e","target":"record","created_at":"2026-05-18T00:41:58Z","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":"4a821628506e16a00840406db838c61c89bd5b19a1a1a3730bde2ab84e2206de","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-12-14T13:34:31Z","title_canon_sha256":"269f6c8ca913269f7f299b36f2415ca1c56d8abe1ca7431d8d5ef6be45605abf"},"schema_version":"1.0","source":{"id":"1412.4356","kind":"arxiv","version":1}},"canonical_sha256":"a45410e2c1f3c056e88182df70970625826b92fe17fb9b20faf7c1a3f9f49b5e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a45410e2c1f3c056e88182df70970625826b92fe17fb9b20faf7c1a3f9f49b5e","first_computed_at":"2026-05-18T00:41:58.651819Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:41:58.651819Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mwvWtH0AKFipKKhuljJPVTwlB98dU1ld3zAYtmGKNL7DvC8/HRW0BBhOjxtT7cNOuM/BuJWDPAvfuzIN4+l7DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:41:58.652379Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.4356","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e90fc1860b15676d2878b8a5598facdb3c4666a08efcfd7184dafcac6a9e824e","sha256:23c3607909c8771acdd8d123247cf4e57656ebada91383f92bf98b983af0b3e3"],"state_sha256":"707e760fcc336a083f0ad45632b7bc782da39d491447420ee210e780bbc0ee78"}