{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:DCXVQ747T2ZY5MJKLIQJOVF6SV","short_pith_number":"pith:DCXVQ747","schema_version":"1.0","canonical_sha256":"18af587f9f9eb38eb12a5a209754be95659020a31a984fd632851a42154d8c0f","source":{"kind":"arxiv","id":"2510.22184","version":3},"attestation_state":"computed","paper":{"title":"Direct Measurement of the $5s5p\\,{}^1P_1 \\to 5s4d\\,{}^1D_2$ Decay Rate in Strontium","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"Naohiro Okamoto, Takatoshi Aoki, Yoshio Torii","submitted_at":"2025-10-25T06:32:46Z","abstract_excerpt":"We report the first direct experimental determination of the branching ratio of the $5s4d\\,{}^1D_2 \\to 5s5p\\,{}^3P_2$ transition and the decay rate of the $5s5p\\,{}^1P_1 \\to 5s4d\\,{}^1D_2$ transition in neutral strontium. For more than four decades, these quantities lacked an experimental determination independent of theoretical input. We measure the branching ratio to be $0.177(4)$, significantly lower than the widely cited theoretical value of $0.322$ [C. W. Bauschlicher Jr. {\\it et al.}, J. Phys. B \\textbf{18}, 1523 (1985)]. We also determine the decay rate to be $5.3(5)\\times10^3\\,\\mathrm{"},"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":"2510.22184","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2025-10-25T06:32:46Z","cross_cats_sorted":[],"title_canon_sha256":"80c97e17902b27ad9fe6b2840c0036afa3d92da1730db3b2d5317c07fd22c75a","abstract_canon_sha256":"332a1df155c4d6de35554c5784144ace39dc58b937f1da47017c6a5226deb552"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-29T01:14:25.250298Z","signature_b64":"5xYclw7HpKtn365I8t1JZbWsrHtSMECg0Uo2G2REsZb5wkXDqAgi+Cp9rLXLIip1Hnme0oK643Vnuh562mNQDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"18af587f9f9eb38eb12a5a209754be95659020a31a984fd632851a42154d8c0f","last_reissued_at":"2026-06-29T01:14:25.249028Z","signature_status":"signed_v1","first_computed_at":"2026-06-29T01:14:25.249028Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Direct Measurement of the $5s5p\\,{}^1P_1 \\to 5s4d\\,{}^1D_2$ Decay Rate in Strontium","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"Naohiro Okamoto, Takatoshi Aoki, Yoshio Torii","submitted_at":"2025-10-25T06:32:46Z","abstract_excerpt":"We report the first direct experimental determination of the branching ratio of the $5s4d\\,{}^1D_2 \\to 5s5p\\,{}^3P_2$ transition and the decay rate of the $5s5p\\,{}^1P_1 \\to 5s4d\\,{}^1D_2$ transition in neutral strontium. For more than four decades, these quantities lacked an experimental determination independent of theoretical input. We measure the branching ratio to be $0.177(4)$, significantly lower than the widely cited theoretical value of $0.322$ [C. W. Bauschlicher Jr. {\\it et al.}, J. Phys. B \\textbf{18}, 1523 (1985)]. We also determine the decay rate to be $5.3(5)\\times10^3\\,\\mathrm{"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2510.22184","kind":"arxiv","version":3},"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/2510.22184/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2510.22184","created_at":"2026-06-29T01:14:25.249794+00:00"},{"alias_kind":"arxiv_version","alias_value":"2510.22184v3","created_at":"2026-06-29T01:14:25.249794+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2510.22184","created_at":"2026-06-29T01:14:25.249794+00:00"},{"alias_kind":"pith_short_12","alias_value":"DCXVQ747T2ZY","created_at":"2026-06-29T01:14:25.249794+00:00"},{"alias_kind":"pith_short_16","alias_value":"DCXVQ747T2ZY5MJK","created_at":"2026-06-29T01:14:25.249794+00:00"},{"alias_kind":"pith_short_8","alias_value":"DCXVQ747","created_at":"2026-06-29T01:14:25.249794+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/DCXVQ747T2ZY5MJKLIQJOVF6SV","json":"https://pith.science/pith/DCXVQ747T2ZY5MJKLIQJOVF6SV.json","graph_json":"https://pith.science/api/pith-number/DCXVQ747T2ZY5MJKLIQJOVF6SV/graph.json","events_json":"https://pith.science/api/pith-number/DCXVQ747T2ZY5MJKLIQJOVF6SV/events.json","paper":"https://pith.science/paper/DCXVQ747"},"agent_actions":{"view_html":"https://pith.science/pith/DCXVQ747T2ZY5MJKLIQJOVF6SV","download_json":"https://pith.science/pith/DCXVQ747T2ZY5MJKLIQJOVF6SV.json","view_paper":"https://pith.science/paper/DCXVQ747","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2510.22184&json=true","fetch_graph":"https://pith.science/api/pith-number/DCXVQ747T2ZY5MJKLIQJOVF6SV/graph.json","fetch_events":"https://pith.science/api/pith-number/DCXVQ747T2ZY5MJKLIQJOVF6SV/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/DCXVQ747T2ZY5MJKLIQJOVF6SV/action/timestamp_anchor","attest_storage":"https://pith.science/pith/DCXVQ747T2ZY5MJKLIQJOVF6SV/action/storage_attestation","attest_author":"https://pith.science/pith/DCXVQ747T2ZY5MJKLIQJOVF6SV/action/author_attestation","sign_citation":"https://pith.science/pith/DCXVQ747T2ZY5MJKLIQJOVF6SV/action/citation_signature","submit_replication":"https://pith.science/pith/DCXVQ747T2ZY5MJKLIQJOVF6SV/action/replication_record"}},"created_at":"2026-06-29T01:14:25.249794+00:00","updated_at":"2026-06-29T01:14:25.249794+00:00"}