{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:XI2S6GRHZY3KLPSBKDI4LOFVR7","short_pith_number":"pith:XI2S6GRH","canonical_record":{"source":{"id":"1003.3740","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-03-19T08:34:04Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"1c6ec13bc46faa193348023e2eb3a468561f0de69a37e76729ddd3746d12ad87","abstract_canon_sha256":"5e40998dc785535c7a8e6d9ed88edf279a0bd1c61545bb116b49016696320f1e"},"schema_version":"1.0"},"canonical_sha256":"ba352f1a27ce36a5be4150d1c5b8b58fc6ab9e74a2df64bb96b335c9354d080f","source":{"kind":"arxiv","id":"1003.3740","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1003.3740","created_at":"2026-05-18T03:03:10Z"},{"alias_kind":"arxiv_version","alias_value":"1003.3740v1","created_at":"2026-05-18T03:03:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1003.3740","created_at":"2026-05-18T03:03:10Z"},{"alias_kind":"pith_short_12","alias_value":"XI2S6GRHZY3K","created_at":"2026-05-18T12:26:17Z"},{"alias_kind":"pith_short_16","alias_value":"XI2S6GRHZY3KLPSB","created_at":"2026-05-18T12:26:17Z"},{"alias_kind":"pith_short_8","alias_value":"XI2S6GRH","created_at":"2026-05-18T12:26:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:XI2S6GRHZY3KLPSBKDI4LOFVR7","target":"record","payload":{"canonical_record":{"source":{"id":"1003.3740","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-03-19T08:34:04Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"1c6ec13bc46faa193348023e2eb3a468561f0de69a37e76729ddd3746d12ad87","abstract_canon_sha256":"5e40998dc785535c7a8e6d9ed88edf279a0bd1c61545bb116b49016696320f1e"},"schema_version":"1.0"},"canonical_sha256":"ba352f1a27ce36a5be4150d1c5b8b58fc6ab9e74a2df64bb96b335c9354d080f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:03:10.568285Z","signature_b64":"EPTNd+C8lk0bzPhm2vQHWt5r7nM12/dns+2eVXbDhTFV35VPSujabrNY/k3y8e1Xk5WYr4xwEQhJeAfUjdPeDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ba352f1a27ce36a5be4150d1c5b8b58fc6ab9e74a2df64bb96b335c9354d080f","last_reissued_at":"2026-05-18T03:03:10.567644Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:03:10.567644Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1003.3740","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:03:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UoCibYHWQcPxkqMs1F3GUjXA6s0wJ7oQuI+YXU0TIP8ldmVyMjbhG9dKplFBIoyBSmBf5JAymCDIpe82gfsUBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T12:13:11.026508Z"},"content_sha256":"1a1bb7a40a98d138c6519c46fe541c0a21b700299383d1ac3e721fa8812a9943","schema_version":"1.0","event_id":"sha256:1a1bb7a40a98d138c6519c46fe541c0a21b700299383d1ac3e721fa8812a9943"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:XI2S6GRHZY3KLPSBKDI4LOFVR7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Formation of cBN nanocrystals by He+ implantations of hBN","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.other"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Ronald Machaka, Rudolph M Erasmus, Trevor E Derry","submitted_at":"2010-03-19T08:34:04Z","abstract_excerpt":"The structural modifications of polycrystalline hexagonal boron nitride implanted with He+ ion beams at energies between 200 keV and 1.2 MeV to fluences of 1.0 \\times 1017 ions \\cdot cm-2 were investigated using micro-Raman spectroscopy. The measured Raman spectra show evidence of implantation-induced structural transformations from the hexagonal phase to nanocrystalline cubic boron nitride, rhombohedral boron nitride and amorphous boron nitride phases. The first-order Longitudinal-Optical cBN phonon was observed to be downshifted and asymmetrically broadened and this was explained using the s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1003.3740","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":""},"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":"2026-05-18T03:03:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PJqqUcjQTRzhCMGvScFqTp0cF+V8aEiIOSCm/fl4Ct3wDGkPKGJAdSv1nZx8fkv1tXT2EBRJ/VUGoab0GsCoAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T12:13:11.027218Z"},"content_sha256":"cfb49a019d5ffaff1f2bfe39ee6abc9a5ebe6b8273d13560e4715314fc763264","schema_version":"1.0","event_id":"sha256:cfb49a019d5ffaff1f2bfe39ee6abc9a5ebe6b8273d13560e4715314fc763264"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XI2S6GRHZY3KLPSBKDI4LOFVR7/bundle.json","state_url":"https://pith.science/pith/XI2S6GRHZY3KLPSBKDI4LOFVR7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XI2S6GRHZY3KLPSBKDI4LOFVR7/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":"2026-06-26T12:13:11Z","links":{"resolver":"https://pith.science/pith/XI2S6GRHZY3KLPSBKDI4LOFVR7","bundle":"https://pith.science/pith/XI2S6GRHZY3KLPSBKDI4LOFVR7/bundle.json","state":"https://pith.science/pith/XI2S6GRHZY3KLPSBKDI4LOFVR7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XI2S6GRHZY3KLPSBKDI4LOFVR7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:XI2S6GRHZY3KLPSBKDI4LOFVR7","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":"5e40998dc785535c7a8e6d9ed88edf279a0bd1c61545bb116b49016696320f1e","cross_cats_sorted":["cond-mat.other"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-03-19T08:34:04Z","title_canon_sha256":"1c6ec13bc46faa193348023e2eb3a468561f0de69a37e76729ddd3746d12ad87"},"schema_version":"1.0","source":{"id":"1003.3740","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1003.3740","created_at":"2026-05-18T03:03:10Z"},{"alias_kind":"arxiv_version","alias_value":"1003.3740v1","created_at":"2026-05-18T03:03:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1003.3740","created_at":"2026-05-18T03:03:10Z"},{"alias_kind":"pith_short_12","alias_value":"XI2S6GRHZY3K","created_at":"2026-05-18T12:26:17Z"},{"alias_kind":"pith_short_16","alias_value":"XI2S6GRHZY3KLPSB","created_at":"2026-05-18T12:26:17Z"},{"alias_kind":"pith_short_8","alias_value":"XI2S6GRH","created_at":"2026-05-18T12:26:17Z"}],"graph_snapshots":[{"event_id":"sha256:cfb49a019d5ffaff1f2bfe39ee6abc9a5ebe6b8273d13560e4715314fc763264","target":"graph","created_at":"2026-05-18T03:03:10Z","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":"The structural modifications of polycrystalline hexagonal boron nitride implanted with He+ ion beams at energies between 200 keV and 1.2 MeV to fluences of 1.0 \\times 1017 ions \\cdot cm-2 were investigated using micro-Raman spectroscopy. The measured Raman spectra show evidence of implantation-induced structural transformations from the hexagonal phase to nanocrystalline cubic boron nitride, rhombohedral boron nitride and amorphous boron nitride phases. The first-order Longitudinal-Optical cBN phonon was observed to be downshifted and asymmetrically broadened and this was explained using the s","authors_text":"Ronald Machaka, Rudolph M Erasmus, Trevor E Derry","cross_cats":["cond-mat.other"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-03-19T08:34:04Z","title":"Formation of cBN nanocrystals by He+ implantations of hBN"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1003.3740","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":"sha256:1a1bb7a40a98d138c6519c46fe541c0a21b700299383d1ac3e721fa8812a9943","target":"record","created_at":"2026-05-18T03:03:10Z","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":"5e40998dc785535c7a8e6d9ed88edf279a0bd1c61545bb116b49016696320f1e","cross_cats_sorted":["cond-mat.other"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-03-19T08:34:04Z","title_canon_sha256":"1c6ec13bc46faa193348023e2eb3a468561f0de69a37e76729ddd3746d12ad87"},"schema_version":"1.0","source":{"id":"1003.3740","kind":"arxiv","version":1}},"canonical_sha256":"ba352f1a27ce36a5be4150d1c5b8b58fc6ab9e74a2df64bb96b335c9354d080f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ba352f1a27ce36a5be4150d1c5b8b58fc6ab9e74a2df64bb96b335c9354d080f","first_computed_at":"2026-05-18T03:03:10.567644Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:03:10.567644Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EPTNd+C8lk0bzPhm2vQHWt5r7nM12/dns+2eVXbDhTFV35VPSujabrNY/k3y8e1Xk5WYr4xwEQhJeAfUjdPeDA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:03:10.568285Z","signed_message":"canonical_sha256_bytes"},"source_id":"1003.3740","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1a1bb7a40a98d138c6519c46fe541c0a21b700299383d1ac3e721fa8812a9943","sha256:cfb49a019d5ffaff1f2bfe39ee6abc9a5ebe6b8273d13560e4715314fc763264"],"state_sha256":"f0f543de56ac161368d21ba5e5f27c3341361096a156b33de4262a4c4e6ed17f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JGO0Yt0p4X2EV2HtlPWzeTfIP/yB/DS4x91NTMB0ml570m43b5iE5uuKAqgoiVAPmTeedpGHAzvt0+01T104CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T12:13:11.030582Z","bundle_sha256":"bbeb8d5e3b4478312eef77ee6f409e071aabad1a42709f75dacbbb1b3e6936cd"}}