{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:OP634UPHY2ZMJHLHPPM36H6C42","short_pith_number":"pith:OP634UPH","canonical_record":{"source":{"id":"2207.03446","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2022-07-07T17:22:17Z","cross_cats_sorted":[],"title_canon_sha256":"4539ecbd715a59fbd07a09396953d282f9e0ef6f29ac861a14c26b22e6682d15","abstract_canon_sha256":"70202d705f8d5d7c8e4c8452d6b4091ead8f5f3e5398eff0ece7977e874bb435"},"schema_version":"1.0"},"canonical_sha256":"73fdbe51e7c6b2c49d677bd9bf1fc2e6a8485910ba7a619614c5a8fdd9962e78","source":{"kind":"arxiv","id":"2207.03446","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2207.03446","created_at":"2026-07-05T05:14:18Z"},{"alias_kind":"arxiv_version","alias_value":"2207.03446v1","created_at":"2026-07-05T05:14:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2207.03446","created_at":"2026-07-05T05:14:18Z"},{"alias_kind":"pith_short_12","alias_value":"OP634UPHY2ZM","created_at":"2026-07-05T05:14:18Z"},{"alias_kind":"pith_short_16","alias_value":"OP634UPHY2ZMJHLH","created_at":"2026-07-05T05:14:18Z"},{"alias_kind":"pith_short_8","alias_value":"OP634UPH","created_at":"2026-07-05T05:14:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:OP634UPHY2ZMJHLHPPM36H6C42","target":"record","payload":{"canonical_record":{"source":{"id":"2207.03446","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2022-07-07T17:22:17Z","cross_cats_sorted":[],"title_canon_sha256":"4539ecbd715a59fbd07a09396953d282f9e0ef6f29ac861a14c26b22e6682d15","abstract_canon_sha256":"70202d705f8d5d7c8e4c8452d6b4091ead8f5f3e5398eff0ece7977e874bb435"},"schema_version":"1.0"},"canonical_sha256":"73fdbe51e7c6b2c49d677bd9bf1fc2e6a8485910ba7a619614c5a8fdd9962e78","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:14:18.273146Z","signature_b64":"KCrbL20osZdEe9bcn860dPbYYoGi55gcLV1KOmUnAgqhtl3ShCodMfGbTaBpRVz+CmPmtDVI4o1WBjB5zbjUCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"73fdbe51e7c6b2c49d677bd9bf1fc2e6a8485910ba7a619614c5a8fdd9962e78","last_reissued_at":"2026-07-05T05:14:18.272637Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:14:18.272637Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2207.03446","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":"2026-07-05T05:14:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tPqSHUvA5diOqwCdTqRfJTYS5nMQkqbnEH2D92fnl0Br92cDN6RcizdHmx3PUYS5uizx5cYSFQSC3Ib8lPjvBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T05:18:38.809403Z"},"content_sha256":"9e64cbd5563d27b49bf891c9138ce874f026e8690644330974800fe7123c5bec","schema_version":"1.0","event_id":"sha256:9e64cbd5563d27b49bf891c9138ce874f026e8690644330974800fe7123c5bec"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:OP634UPHY2ZMJHLHPPM36H6C42","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Polychromatic Excitation of Delocalized Long-Lived Proton Spin States in Aliphatic Chains","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.chem-ph","authors_text":"Anna Sonnefeld, Geoffrey Bodenhausen, Kirill Sheberstov","submitted_at":"2022-07-07T17:22:17Z","abstract_excerpt":"Long-lived states (LLS) involving pairs of magnetically inequivalent but chemically equivalent proton spins in aliphatic (CH$_2$)$_n$ chains can be excited by simultaneous application of weak selective radio-frequency (RF) fields at n chemical shifts by polychromatic spin lock induced crossing (poly-SLIC). The LLS are delocalized throughout the aliphatic chain by mixing of intrapair singlet states and by excitation of LLS comprising products of four or six spins. The measured lifetimes T$_{LLS}$ in a model compound are about 5 times longer than T1, and are strongly affected by interactions wit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2207.03446","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/2207.03446/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:14:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9U3hlpfmkCWwYkKzaGZ96xqV5nCnhHSGBV/uDnL/pdWNWegO77RAgvOn56mWE3HGNpGiIxk6gvctMgiM1uCtCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T05:18:38.810328Z"},"content_sha256":"565a9ad95aef9a32a63a927169ed26e49d8740e919e88c393db0b3559633f40f","schema_version":"1.0","event_id":"sha256:565a9ad95aef9a32a63a927169ed26e49d8740e919e88c393db0b3559633f40f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OP634UPHY2ZMJHLHPPM36H6C42/bundle.json","state_url":"https://pith.science/pith/OP634UPHY2ZMJHLHPPM36H6C42/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OP634UPHY2ZMJHLHPPM36H6C42/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":"2026-08-01T05:18:38Z","links":{"resolver":"https://pith.science/pith/OP634UPHY2ZMJHLHPPM36H6C42","bundle":"https://pith.science/pith/OP634UPHY2ZMJHLHPPM36H6C42/bundle.json","state":"https://pith.science/pith/OP634UPHY2ZMJHLHPPM36H6C42/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OP634UPHY2ZMJHLHPPM36H6C42/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:OP634UPHY2ZMJHLHPPM36H6C42","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":"70202d705f8d5d7c8e4c8452d6b4091ead8f5f3e5398eff0ece7977e874bb435","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2022-07-07T17:22:17Z","title_canon_sha256":"4539ecbd715a59fbd07a09396953d282f9e0ef6f29ac861a14c26b22e6682d15"},"schema_version":"1.0","source":{"id":"2207.03446","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2207.03446","created_at":"2026-07-05T05:14:18Z"},{"alias_kind":"arxiv_version","alias_value":"2207.03446v1","created_at":"2026-07-05T05:14:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2207.03446","created_at":"2026-07-05T05:14:18Z"},{"alias_kind":"pith_short_12","alias_value":"OP634UPHY2ZM","created_at":"2026-07-05T05:14:18Z"},{"alias_kind":"pith_short_16","alias_value":"OP634UPHY2ZMJHLH","created_at":"2026-07-05T05:14:18Z"},{"alias_kind":"pith_short_8","alias_value":"OP634UPH","created_at":"2026-07-05T05:14:18Z"}],"graph_snapshots":[{"event_id":"sha256:565a9ad95aef9a32a63a927169ed26e49d8740e919e88c393db0b3559633f40f","target":"graph","created_at":"2026-07-05T05:14:18Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2207.03446/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Long-lived states (LLS) involving pairs of magnetically inequivalent but chemically equivalent proton spins in aliphatic (CH$_2$)$_n$ chains can be excited by simultaneous application of weak selective radio-frequency (RF) fields at n chemical shifts by polychromatic spin lock induced crossing (poly-SLIC). The LLS are delocalized throughout the aliphatic chain by mixing of intrapair singlet states and by excitation of LLS comprising products of four or six spins. The measured lifetimes T$_{LLS}$ in a model compound are about 5 times longer than T1, and are strongly affected by interactions wit","authors_text":"Anna Sonnefeld, Geoffrey Bodenhausen, Kirill Sheberstov","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2022-07-07T17:22:17Z","title":"Polychromatic Excitation of Delocalized Long-Lived Proton Spin States in Aliphatic Chains"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2207.03446","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":"sha256:9e64cbd5563d27b49bf891c9138ce874f026e8690644330974800fe7123c5bec","target":"record","created_at":"2026-07-05T05:14:18Z","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":"70202d705f8d5d7c8e4c8452d6b4091ead8f5f3e5398eff0ece7977e874bb435","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2022-07-07T17:22:17Z","title_canon_sha256":"4539ecbd715a59fbd07a09396953d282f9e0ef6f29ac861a14c26b22e6682d15"},"schema_version":"1.0","source":{"id":"2207.03446","kind":"arxiv","version":1}},"canonical_sha256":"73fdbe51e7c6b2c49d677bd9bf1fc2e6a8485910ba7a619614c5a8fdd9962e78","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"73fdbe51e7c6b2c49d677bd9bf1fc2e6a8485910ba7a619614c5a8fdd9962e78","first_computed_at":"2026-07-05T05:14:18.272637Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:14:18.272637Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KCrbL20osZdEe9bcn860dPbYYoGi55gcLV1KOmUnAgqhtl3ShCodMfGbTaBpRVz+CmPmtDVI4o1WBjB5zbjUCg==","signature_status":"signed_v1","signed_at":"2026-07-05T05:14:18.273146Z","signed_message":"canonical_sha256_bytes"},"source_id":"2207.03446","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9e64cbd5563d27b49bf891c9138ce874f026e8690644330974800fe7123c5bec","sha256:565a9ad95aef9a32a63a927169ed26e49d8740e919e88c393db0b3559633f40f"],"state_sha256":"f0b5f2a71c97b577b815c125c6169162dda486839d94caecc088b3ae69f0609e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"z4KalgNn6F4BU/WjoN4D9f49H9i3qvjCRgldxWMei5hw3fXGrzFDCLd/2e6xn9do9vSB3R8r4F0o/Shd6n04Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-01T05:18:38.816880Z","bundle_sha256":"f8f506b7186cda9b6a2cf56c736529d3f4887cad3a090df72b3338474c5cf909"}}