{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:FV2WQFTK4YEEIF6M7BNWLOEII5","short_pith_number":"pith:FV2WQFTK","canonical_record":{"source":{"id":"1807.08796","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2018-07-23T19:25:50Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"e3088e84b06503f044902022eef9a91fd50a0655811fc40b7317038cf8619b19","abstract_canon_sha256":"a89bffff6ccb1a7565bdee4e91e2e5840bb5c725fa4b82c88addbcbafb25bd4e"},"schema_version":"1.0"},"canonical_sha256":"2d7568166ae6084417ccf85b65b888475c47fbd8ed007f5fd0ba034322b23066","source":{"kind":"arxiv","id":"1807.08796","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.08796","created_at":"2026-05-18T00:04:55Z"},{"alias_kind":"arxiv_version","alias_value":"1807.08796v1","created_at":"2026-05-18T00:04:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.08796","created_at":"2026-05-18T00:04:55Z"},{"alias_kind":"pith_short_12","alias_value":"FV2WQFTK4YEE","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"FV2WQFTK4YEEIF6M","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"FV2WQFTK","created_at":"2026-05-18T12:32:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:FV2WQFTK4YEEIF6M7BNWLOEII5","target":"record","payload":{"canonical_record":{"source":{"id":"1807.08796","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2018-07-23T19:25:50Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"e3088e84b06503f044902022eef9a91fd50a0655811fc40b7317038cf8619b19","abstract_canon_sha256":"a89bffff6ccb1a7565bdee4e91e2e5840bb5c725fa4b82c88addbcbafb25bd4e"},"schema_version":"1.0"},"canonical_sha256":"2d7568166ae6084417ccf85b65b888475c47fbd8ed007f5fd0ba034322b23066","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:04:55.392010Z","signature_b64":"xD8bcUbiSlE8MmYkANpiqC249Oe5TW6DGtdZZqBhKNALNmRLn4bzS6aSLdyROybYUnnUX4a6zDgrMxJuCaOPBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2d7568166ae6084417ccf85b65b888475c47fbd8ed007f5fd0ba034322b23066","last_reissued_at":"2026-05-18T00:04:55.391294Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:04:55.391294Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.08796","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":"2026-05-18T00:04:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xgbQ1rvNsZMueq1S+7w5Xt/u/RVc4H/ejKTkv8/EBldiU1FdXBmPwKRgIRSk5MAHR0b6JQynqYc7jkmAAssyDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:42:02.915363Z"},"content_sha256":"a00475c1f2a4e94d18715d883c149c2ee26417d070fb77424382731db80988e5","schema_version":"1.0","event_id":"sha256:a00475c1f2a4e94d18715d883c149c2ee26417d070fb77424382731db80988e5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:FV2WQFTK4YEEIF6M7BNWLOEII5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ultrahigh-density spin-polarized H and D observed via magnetization quantum beats","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph"],"primary_cat":"physics.chem-ph","authors_text":"Chrysovalantis S. Kannis, Dimitris Sofikitis, Gregoris K. Boulogiannis, T. Peter Rakitzis","submitted_at":"2018-07-23T19:25:50Z","abstract_excerpt":"We measure nuclear and electron spin-polarized H and D densities of at least 10$^{19}\\, cm^{-3}$ with $\\sim$10 ns lifetimes, from the photodissociation of HBr and DI with circularly-polarized UV light pulses. This density is $\\sim$6 orders of magnitude higher than that produced by conventional continuous-production methods, and, surprisingly, at least 100 times higher than expected densities for this photodissociation method. We observe the hyperfine quantum beating of the H and D magnetization with a pick-up coil, i.e., the respective 0.7 and 3 ns periodic transfer of polarization from the el"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.08796","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":"2026-05-18T00:04:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1YSqTX6y6u14Z0Zhl+JIGp9J2cTdBAG+R/lzD+GjSzHoOs9RZiroYyOeFnSkaffIA0Uujr72xaILTbcxSa5KBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:42:02.915731Z"},"content_sha256":"4d0656f2f4e350db2e80457d7a9c54543f74fe18bd2ed2f919238c016396ed7e","schema_version":"1.0","event_id":"sha256:4d0656f2f4e350db2e80457d7a9c54543f74fe18bd2ed2f919238c016396ed7e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FV2WQFTK4YEEIF6M7BNWLOEII5/bundle.json","state_url":"https://pith.science/pith/FV2WQFTK4YEEIF6M7BNWLOEII5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FV2WQFTK4YEEIF6M7BNWLOEII5/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":"2026-05-30T08:42:02Z","links":{"resolver":"https://pith.science/pith/FV2WQFTK4YEEIF6M7BNWLOEII5","bundle":"https://pith.science/pith/FV2WQFTK4YEEIF6M7BNWLOEII5/bundle.json","state":"https://pith.science/pith/FV2WQFTK4YEEIF6M7BNWLOEII5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FV2WQFTK4YEEIF6M7BNWLOEII5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:FV2WQFTK4YEEIF6M7BNWLOEII5","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":"a89bffff6ccb1a7565bdee4e91e2e5840bb5c725fa4b82c88addbcbafb25bd4e","cross_cats_sorted":["physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2018-07-23T19:25:50Z","title_canon_sha256":"e3088e84b06503f044902022eef9a91fd50a0655811fc40b7317038cf8619b19"},"schema_version":"1.0","source":{"id":"1807.08796","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.08796","created_at":"2026-05-18T00:04:55Z"},{"alias_kind":"arxiv_version","alias_value":"1807.08796v1","created_at":"2026-05-18T00:04:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.08796","created_at":"2026-05-18T00:04:55Z"},{"alias_kind":"pith_short_12","alias_value":"FV2WQFTK4YEE","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"FV2WQFTK4YEEIF6M","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"FV2WQFTK","created_at":"2026-05-18T12:32:25Z"}],"graph_snapshots":[{"event_id":"sha256:4d0656f2f4e350db2e80457d7a9c54543f74fe18bd2ed2f919238c016396ed7e","target":"graph","created_at":"2026-05-18T00:04:55Z","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":"We measure nuclear and electron spin-polarized H and D densities of at least 10$^{19}\\, cm^{-3}$ with $\\sim$10 ns lifetimes, from the photodissociation of HBr and DI with circularly-polarized UV light pulses. This density is $\\sim$6 orders of magnitude higher than that produced by conventional continuous-production methods, and, surprisingly, at least 100 times higher than expected densities for this photodissociation method. We observe the hyperfine quantum beating of the H and D magnetization with a pick-up coil, i.e., the respective 0.7 and 3 ns periodic transfer of polarization from the el","authors_text":"Chrysovalantis S. Kannis, Dimitris Sofikitis, Gregoris K. Boulogiannis, T. Peter Rakitzis","cross_cats":["physics.atom-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2018-07-23T19:25:50Z","title":"Ultrahigh-density spin-polarized H and D observed via magnetization quantum beats"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.08796","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:a00475c1f2a4e94d18715d883c149c2ee26417d070fb77424382731db80988e5","target":"record","created_at":"2026-05-18T00:04:55Z","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":"a89bffff6ccb1a7565bdee4e91e2e5840bb5c725fa4b82c88addbcbafb25bd4e","cross_cats_sorted":["physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2018-07-23T19:25:50Z","title_canon_sha256":"e3088e84b06503f044902022eef9a91fd50a0655811fc40b7317038cf8619b19"},"schema_version":"1.0","source":{"id":"1807.08796","kind":"arxiv","version":1}},"canonical_sha256":"2d7568166ae6084417ccf85b65b888475c47fbd8ed007f5fd0ba034322b23066","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2d7568166ae6084417ccf85b65b888475c47fbd8ed007f5fd0ba034322b23066","first_computed_at":"2026-05-18T00:04:55.391294Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:04:55.391294Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xD8bcUbiSlE8MmYkANpiqC249Oe5TW6DGtdZZqBhKNALNmRLn4bzS6aSLdyROybYUnnUX4a6zDgrMxJuCaOPBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:04:55.392010Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.08796","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a00475c1f2a4e94d18715d883c149c2ee26417d070fb77424382731db80988e5","sha256:4d0656f2f4e350db2e80457d7a9c54543f74fe18bd2ed2f919238c016396ed7e"],"state_sha256":"3d3f897702471d11f9f480ec65b0dceaa51c89196c6cfbc5bc92587437d62dec"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jKvbzDQJL4uaZlQ8UQmvb1fUPvawwEicVBxKu0TBvjBsSpBBu/0sQwl0Pkk0LAAP/1xzFK7mkeh6agJPxHv8Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T08:42:02.918814Z","bundle_sha256":"f2f80479d76f48b687fcb58aa56ce61a43d12268f6aa7e114459a35860a9adfd"}}