{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:6DF76B3L7JIT6TLBPJFZTWICT3","short_pith_number":"pith:6DF76B3L","canonical_record":{"source":{"id":"1603.07404","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-03-24T01:10:08Z","cross_cats_sorted":[],"title_canon_sha256":"3ea78f4d65e1e6d8b77006645265e26917cf87d3c8076d84765e37572f357a18","abstract_canon_sha256":"4d00fe00d693eefbc00f33c59feba3560f2f525ae9f1705d59b9e5396959504c"},"schema_version":"1.0"},"canonical_sha256":"f0cbff076bfa513f4d617a4b99d9029ed914e15127ab81df305cb375768382ab","source":{"kind":"arxiv","id":"1603.07404","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.07404","created_at":"2026-05-18T01:18:21Z"},{"alias_kind":"arxiv_version","alias_value":"1603.07404v1","created_at":"2026-05-18T01:18:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.07404","created_at":"2026-05-18T01:18:21Z"},{"alias_kind":"pith_short_12","alias_value":"6DF76B3L7JIT","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_16","alias_value":"6DF76B3L7JIT6TLB","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_8","alias_value":"6DF76B3L","created_at":"2026-05-18T12:30:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:6DF76B3L7JIT6TLBPJFZTWICT3","target":"record","payload":{"canonical_record":{"source":{"id":"1603.07404","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-03-24T01:10:08Z","cross_cats_sorted":[],"title_canon_sha256":"3ea78f4d65e1e6d8b77006645265e26917cf87d3c8076d84765e37572f357a18","abstract_canon_sha256":"4d00fe00d693eefbc00f33c59feba3560f2f525ae9f1705d59b9e5396959504c"},"schema_version":"1.0"},"canonical_sha256":"f0cbff076bfa513f4d617a4b99d9029ed914e15127ab81df305cb375768382ab","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:18:21.054389Z","signature_b64":"y7DuY87YnzweXDGzU2uco1B0700xDBoKBdX3Uc8sSlFo0Ohxy/epwtdThIo+v9DlnoCOE7JtHS0L2+P4aAueAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f0cbff076bfa513f4d617a4b99d9029ed914e15127ab81df305cb375768382ab","last_reissued_at":"2026-05-18T01:18:21.053753Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:18:21.053753Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1603.07404","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":"2026-05-18T01:18:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GMOxUXNTI1t90OliFrQ2g8fd4diPh3OoHw8N0NUwvbIkoYOHzqrVFKwQZoIpWM+csiikFJpN2gfBok4XZzENCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T10:33:30.166482Z"},"content_sha256":"45d17fb05f1b49221a20bb53706c82e9afe4d9ae2da6e42b0b73fbd244103039","schema_version":"1.0","event_id":"sha256:45d17fb05f1b49221a20bb53706c82e9afe4d9ae2da6e42b0b73fbd244103039"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:6DF76B3L7JIT6TLBPJFZTWICT3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Measurement of paramagnetic spin concentration in a solid-state system using double electron-electron resonance","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Susumu Takahashi, Viktor Stepanov","submitted_at":"2016-03-24T01:10:08Z","abstract_excerpt":"Diamond has been extensively investigated recently due to a wide range of potential applications of nitrogen-vacancy (NV) defect centers existing in a diamond lattice. The applications include magnetometry and quantum information technologies, and long decoherence time ($T_2$) of NV centers is critical for those applications. Although it has been known that $T_2$ highly depends on the concentration of paramagnetic impurities in diamond, precise measurement of the impurity concentration remains challenging. In the preset work, we show a method to determine a wide range of the nitrogen concentra"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.07404","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":"2026-05-18T01:18:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"j5BML9duYYU30JcsSHdQlEn4eGPRsT4Flmy1IuabRDHrT8oRab6CuHDXJNWRV98j8xxWtJ7kmdIbKAgZ+QTHDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T10:33:30.167126Z"},"content_sha256":"3ac7e750147bcea08eeb165ced50e132711ae08a43e09e6056513e37a675c4d9","schema_version":"1.0","event_id":"sha256:3ac7e750147bcea08eeb165ced50e132711ae08a43e09e6056513e37a675c4d9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6DF76B3L7JIT6TLBPJFZTWICT3/bundle.json","state_url":"https://pith.science/pith/6DF76B3L7JIT6TLBPJFZTWICT3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6DF76B3L7JIT6TLBPJFZTWICT3/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":"2026-05-26T10:33:30Z","links":{"resolver":"https://pith.science/pith/6DF76B3L7JIT6TLBPJFZTWICT3","bundle":"https://pith.science/pith/6DF76B3L7JIT6TLBPJFZTWICT3/bundle.json","state":"https://pith.science/pith/6DF76B3L7JIT6TLBPJFZTWICT3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6DF76B3L7JIT6TLBPJFZTWICT3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:6DF76B3L7JIT6TLBPJFZTWICT3","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":"4d00fe00d693eefbc00f33c59feba3560f2f525ae9f1705d59b9e5396959504c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-03-24T01:10:08Z","title_canon_sha256":"3ea78f4d65e1e6d8b77006645265e26917cf87d3c8076d84765e37572f357a18"},"schema_version":"1.0","source":{"id":"1603.07404","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.07404","created_at":"2026-05-18T01:18:21Z"},{"alias_kind":"arxiv_version","alias_value":"1603.07404v1","created_at":"2026-05-18T01:18:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.07404","created_at":"2026-05-18T01:18:21Z"},{"alias_kind":"pith_short_12","alias_value":"6DF76B3L7JIT","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_16","alias_value":"6DF76B3L7JIT6TLB","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_8","alias_value":"6DF76B3L","created_at":"2026-05-18T12:30:01Z"}],"graph_snapshots":[{"event_id":"sha256:3ac7e750147bcea08eeb165ced50e132711ae08a43e09e6056513e37a675c4d9","target":"graph","created_at":"2026-05-18T01:18:21Z","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":"Diamond has been extensively investigated recently due to a wide range of potential applications of nitrogen-vacancy (NV) defect centers existing in a diamond lattice. The applications include magnetometry and quantum information technologies, and long decoherence time ($T_2$) of NV centers is critical for those applications. Although it has been known that $T_2$ highly depends on the concentration of paramagnetic impurities in diamond, precise measurement of the impurity concentration remains challenging. In the preset work, we show a method to determine a wide range of the nitrogen concentra","authors_text":"Susumu Takahashi, Viktor Stepanov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-03-24T01:10:08Z","title":"Measurement of paramagnetic spin concentration in a solid-state system using double electron-electron resonance"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.07404","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":"sha256:45d17fb05f1b49221a20bb53706c82e9afe4d9ae2da6e42b0b73fbd244103039","target":"record","created_at":"2026-05-18T01:18:21Z","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":"4d00fe00d693eefbc00f33c59feba3560f2f525ae9f1705d59b9e5396959504c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-03-24T01:10:08Z","title_canon_sha256":"3ea78f4d65e1e6d8b77006645265e26917cf87d3c8076d84765e37572f357a18"},"schema_version":"1.0","source":{"id":"1603.07404","kind":"arxiv","version":1}},"canonical_sha256":"f0cbff076bfa513f4d617a4b99d9029ed914e15127ab81df305cb375768382ab","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f0cbff076bfa513f4d617a4b99d9029ed914e15127ab81df305cb375768382ab","first_computed_at":"2026-05-18T01:18:21.053753Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:18:21.053753Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"y7DuY87YnzweXDGzU2uco1B0700xDBoKBdX3Uc8sSlFo0Ohxy/epwtdThIo+v9DlnoCOE7JtHS0L2+P4aAueAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:18:21.054389Z","signed_message":"canonical_sha256_bytes"},"source_id":"1603.07404","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:45d17fb05f1b49221a20bb53706c82e9afe4d9ae2da6e42b0b73fbd244103039","sha256:3ac7e750147bcea08eeb165ced50e132711ae08a43e09e6056513e37a675c4d9"],"state_sha256":"dd08f1a1e5281e76e80e986e5f3fb8e257f380c1565e8431c490172df46c5fd6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ppF/KF3Tl1aitswqoZ28Pqp092Mcidu8xniZLx8rPaOY6k9s5qamW70fMvPMwwOPGk8EEwXZGb6SXYdhAFtlCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T10:33:30.171121Z","bundle_sha256":"c729cb6eb5d32df8ca523b327706f1fce70c5b10f66cd4ded787eb50df08dd86"}}