{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:X5ABVXK27BHCAXPADAVXK6OKYX","short_pith_number":"pith:X5ABVXK2","schema_version":"1.0","canonical_sha256":"bf401add5af84e205de0182b7579cac5c446ee20fa00de1b77caf233c9e27439","source":{"kind":"arxiv","id":"2606.27723","version":1},"attestation_state":"computed","paper":{"title":"Vacancy-mediated nitrogen diffusion and aggregation via high-fluence electron beam irradiation in HPHT synthesized diamond crystal","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Chikara Shinei, Hiroshi. Abe, Jun Chen, Masashi Miyakawa, Takashi Taniguchi, Takeshi Ohshima, Tokuyuki Teraji, Yuta Masuyama","submitted_at":"2026-06-26T05:11:20Z","abstract_excerpt":"The negatively charged nitrogen vacancy (NV-) center in diamonds is promising point defect for highly sensitive quantum sensing. The formation of high-density NV- centers is essential for improving sensitivity. We performed room-temperature electron beam irradiation (EBI) and annealing on nitrogen-doped high-pressure high-temperature diamond crystals to convert substitutional nitrogen into NV centers. In the low-fluence region of EBI, neutral substitutional nitrogen (Ns0) concentration decreased and NV0 and NV- center concentration increased with increasing EBI fluence. The decrease in Ns0 con"},"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":"2606.27723","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-06-26T05:11:20Z","cross_cats_sorted":[],"title_canon_sha256":"9d4a3c1920bfa81b280eab70aa45d9b043d09c30468de301e59f49d642da0fa5","abstract_canon_sha256":"8a08f83708becf1f66e0ac9ce14f3d237641b7d08139cc615bb17a131883a2a4"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-29T01:14:46.459082Z","signature_b64":"8Z8JScW7tzvXgx0dnANP4bhKMG2D9eew28fMmBffcPLFrhYQNpn6dD3No1RgjrPjCM3iuLQnhzx36cb5/wlBCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bf401add5af84e205de0182b7579cac5c446ee20fa00de1b77caf233c9e27439","last_reissued_at":"2026-06-29T01:14:46.458657Z","signature_status":"signed_v1","first_computed_at":"2026-06-29T01:14:46.458657Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Vacancy-mediated nitrogen diffusion and aggregation via high-fluence electron beam irradiation in HPHT synthesized diamond crystal","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Chikara Shinei, Hiroshi. Abe, Jun Chen, Masashi Miyakawa, Takashi Taniguchi, Takeshi Ohshima, Tokuyuki Teraji, Yuta Masuyama","submitted_at":"2026-06-26T05:11:20Z","abstract_excerpt":"The negatively charged nitrogen vacancy (NV-) center in diamonds is promising point defect for highly sensitive quantum sensing. The formation of high-density NV- centers is essential for improving sensitivity. We performed room-temperature electron beam irradiation (EBI) and annealing on nitrogen-doped high-pressure high-temperature diamond crystals to convert substitutional nitrogen into NV centers. In the low-fluence region of EBI, neutral substitutional nitrogen (Ns0) concentration decreased and NV0 and NV- center concentration increased with increasing EBI fluence. The decrease in Ns0 con"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.27723","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.27723/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2606.27723","created_at":"2026-06-29T01:14:46.458715+00:00"},{"alias_kind":"arxiv_version","alias_value":"2606.27723v1","created_at":"2026-06-29T01:14:46.458715+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.27723","created_at":"2026-06-29T01:14:46.458715+00:00"},{"alias_kind":"pith_short_12","alias_value":"X5ABVXK27BHC","created_at":"2026-06-29T01:14:46.458715+00:00"},{"alias_kind":"pith_short_16","alias_value":"X5ABVXK27BHCAXPA","created_at":"2026-06-29T01:14:46.458715+00:00"},{"alias_kind":"pith_short_8","alias_value":"X5ABVXK2","created_at":"2026-06-29T01:14:46.458715+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/X5ABVXK27BHCAXPADAVXK6OKYX","json":"https://pith.science/pith/X5ABVXK27BHCAXPADAVXK6OKYX.json","graph_json":"https://pith.science/api/pith-number/X5ABVXK27BHCAXPADAVXK6OKYX/graph.json","events_json":"https://pith.science/api/pith-number/X5ABVXK27BHCAXPADAVXK6OKYX/events.json","paper":"https://pith.science/paper/X5ABVXK2"},"agent_actions":{"view_html":"https://pith.science/pith/X5ABVXK27BHCAXPADAVXK6OKYX","download_json":"https://pith.science/pith/X5ABVXK27BHCAXPADAVXK6OKYX.json","view_paper":"https://pith.science/paper/X5ABVXK2","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2606.27723&json=true","fetch_graph":"https://pith.science/api/pith-number/X5ABVXK27BHCAXPADAVXK6OKYX/graph.json","fetch_events":"https://pith.science/api/pith-number/X5ABVXK27BHCAXPADAVXK6OKYX/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/X5ABVXK27BHCAXPADAVXK6OKYX/action/timestamp_anchor","attest_storage":"https://pith.science/pith/X5ABVXK27BHCAXPADAVXK6OKYX/action/storage_attestation","attest_author":"https://pith.science/pith/X5ABVXK27BHCAXPADAVXK6OKYX/action/author_attestation","sign_citation":"https://pith.science/pith/X5ABVXK27BHCAXPADAVXK6OKYX/action/citation_signature","submit_replication":"https://pith.science/pith/X5ABVXK27BHCAXPADAVXK6OKYX/action/replication_record"}},"created_at":"2026-06-29T01:14:46.458715+00:00","updated_at":"2026-06-29T01:14:46.458715+00:00"}