{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:QES7F3AGDEMDF73RC3GJFNAXEJ","short_pith_number":"pith:QES7F3AG","schema_version":"1.0","canonical_sha256":"8125f2ec06191832ff7116cc92b417227ed92ed24e4bcf9a27bf03a5d6a615bd","source":{"kind":"arxiv","id":"1712.05991","version":1},"attestation_state":"computed","paper":{"title":"High pressure electron spin resonance of the endohedral fullerene $^{15}\\mathrm{N@C}_{60}$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.chem-ph","authors_text":"A. Folli, E. A. Laird, G. A. D. Briggs, J. Zhou, K. Porfyrakis, R. T. Harding","submitted_at":"2017-12-16T17:14:28Z","abstract_excerpt":"We measure the electron spin resonance spectrum of the endohedral fullerene molecule $^{15}\\mathrm{N@C}_{60}$ at pressures ranging from atmospheric pressure to 0.25 GPa, and find that the hyperfine coupling increases linearly with pressure. We present a model based on van der Waals interactions, which accounts for this increase via compression of the fullerene cage and consequent admixture of orbitals with a larger hyperfine coupling. Combining this model with theoretical estimates of the bulk modulus, we predict the pressure shift and compare it to our experimental results, finding fair agree"},"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":"1712.05991","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2017-12-16T17:14:28Z","cross_cats_sorted":[],"title_canon_sha256":"17882fa09e241aad54ce7eb9eda586a8e78fa45f5e9a8c7082c18f101f1e78e9","abstract_canon_sha256":"d1cf2ea190e25e592068cf74d869546fefea1e47860f1a9812f6a05ee01860ba"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:27:51.348299Z","signature_b64":"jG1q9UmKFK42MhpbXzGT6h6WpCZcnEgfRLckqFmfirY8iT9cIjAZsXKRWci62p0PLXqZz1ALTizmWbLmA++RDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8125f2ec06191832ff7116cc92b417227ed92ed24e4bcf9a27bf03a5d6a615bd","last_reissued_at":"2026-05-18T00:27:51.347824Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:27:51.347824Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"High pressure electron spin resonance of the endohedral fullerene $^{15}\\mathrm{N@C}_{60}$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.chem-ph","authors_text":"A. Folli, E. A. Laird, G. A. D. Briggs, J. Zhou, K. Porfyrakis, R. T. Harding","submitted_at":"2017-12-16T17:14:28Z","abstract_excerpt":"We measure the electron spin resonance spectrum of the endohedral fullerene molecule $^{15}\\mathrm{N@C}_{60}$ at pressures ranging from atmospheric pressure to 0.25 GPa, and find that the hyperfine coupling increases linearly with pressure. We present a model based on van der Waals interactions, which accounts for this increase via compression of the fullerene cage and consequent admixture of orbitals with a larger hyperfine coupling. Combining this model with theoretical estimates of the bulk modulus, we predict the pressure shift and compare it to our experimental results, finding fair agree"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.05991","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1712.05991","created_at":"2026-05-18T00:27:51.347901+00:00"},{"alias_kind":"arxiv_version","alias_value":"1712.05991v1","created_at":"2026-05-18T00:27:51.347901+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.05991","created_at":"2026-05-18T00:27:51.347901+00:00"},{"alias_kind":"pith_short_12","alias_value":"QES7F3AGDEMD","created_at":"2026-05-18T12:31:37.085036+00:00"},{"alias_kind":"pith_short_16","alias_value":"QES7F3AGDEMDF73R","created_at":"2026-05-18T12:31:37.085036+00:00"},{"alias_kind":"pith_short_8","alias_value":"QES7F3AG","created_at":"2026-05-18T12:31:37.085036+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/QES7F3AGDEMDF73RC3GJFNAXEJ","json":"https://pith.science/pith/QES7F3AGDEMDF73RC3GJFNAXEJ.json","graph_json":"https://pith.science/api/pith-number/QES7F3AGDEMDF73RC3GJFNAXEJ/graph.json","events_json":"https://pith.science/api/pith-number/QES7F3AGDEMDF73RC3GJFNAXEJ/events.json","paper":"https://pith.science/paper/QES7F3AG"},"agent_actions":{"view_html":"https://pith.science/pith/QES7F3AGDEMDF73RC3GJFNAXEJ","download_json":"https://pith.science/pith/QES7F3AGDEMDF73RC3GJFNAXEJ.json","view_paper":"https://pith.science/paper/QES7F3AG","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1712.05991&json=true","fetch_graph":"https://pith.science/api/pith-number/QES7F3AGDEMDF73RC3GJFNAXEJ/graph.json","fetch_events":"https://pith.science/api/pith-number/QES7F3AGDEMDF73RC3GJFNAXEJ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/QES7F3AGDEMDF73RC3GJFNAXEJ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/QES7F3AGDEMDF73RC3GJFNAXEJ/action/storage_attestation","attest_author":"https://pith.science/pith/QES7F3AGDEMDF73RC3GJFNAXEJ/action/author_attestation","sign_citation":"https://pith.science/pith/QES7F3AGDEMDF73RC3GJFNAXEJ/action/citation_signature","submit_replication":"https://pith.science/pith/QES7F3AGDEMDF73RC3GJFNAXEJ/action/replication_record"}},"created_at":"2026-05-18T00:27:51.347901+00:00","updated_at":"2026-05-18T00:27:51.347901+00:00"}