{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:ECDWMWWFPQ3SQDETS25GLB5TSW","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":"a1c8c6f151b617642a1bb085a0a566963beaae7ddcbc1bc1881f550441dcb6d7","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-07-05T11:29:34Z","title_canon_sha256":"2f39b04975af720c5f52ea534b997e5fb8d90bb23ed106ceea730c12dbc323d9"},"schema_version":"1.0","source":{"id":"1907.02776","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.02776","created_at":"2026-05-17T23:41:23Z"},{"alias_kind":"arxiv_version","alias_value":"1907.02776v1","created_at":"2026-05-17T23:41:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.02776","created_at":"2026-05-17T23:41:23Z"},{"alias_kind":"pith_short_12","alias_value":"ECDWMWWFPQ3S","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"ECDWMWWFPQ3SQDET","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"ECDWMWWF","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:a07e018adda99b601321947dd1c5be4a5357a6737669a955052643602a28aa6b","target":"graph","created_at":"2026-05-17T23:41:23Z","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 present absolute-frequency measurements in ultracold 39K samples of the transitions from the ground state to np Rydberg states. A global nonlinear regression of the np1/2 and np3/2 term values yields an improved wave number of 35009.8139710(22)(sys)(3)(stat) cm-1 for the first ionization threshold of 39K and the quantum defects of the np1/2 and np3/2 series. In addition, we report the frequencies of selected one-photon transitions n's <- np3/2, n'd <- np3/2, n'f <- nd and n'g <- nf and two-photon transitions nf <- np determined by millimeter-wave spectroscopy. By combining the results from ","authors_text":"Felix Helmrich, Fr\\'ed\\'eric Merkt, Hansj\\\"urg Schmutz, Johannes Deiglmayr, Jonas Butscher, Josef Anton Agner, Michael Peper","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-07-05T11:29:34Z","title":"Precision measurement of the ionization energy and quantum defects of 39K I"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.02776","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":"sha256:298d025b455c57aee506803db5fd44cba2dffb464dae842f600bed1aab2088d7","target":"record","created_at":"2026-05-17T23:41:23Z","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":"a1c8c6f151b617642a1bb085a0a566963beaae7ddcbc1bc1881f550441dcb6d7","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-07-05T11:29:34Z","title_canon_sha256":"2f39b04975af720c5f52ea534b997e5fb8d90bb23ed106ceea730c12dbc323d9"},"schema_version":"1.0","source":{"id":"1907.02776","kind":"arxiv","version":1}},"canonical_sha256":"2087665ac57c37280c9396ba6587b395b0bf11411a02f98b8109233cf594bd0b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2087665ac57c37280c9396ba6587b395b0bf11411a02f98b8109233cf594bd0b","first_computed_at":"2026-05-17T23:41:23.152947Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:41:23.152947Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"sYIvcpmSz+8bHwsytGg2zXylkdrXtCHrXxtf5A3038TGvchgQNy/y1WqAtcAaf1BbfAMYP5tKiO88nI+IgodDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:41:23.153664Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.02776","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:298d025b455c57aee506803db5fd44cba2dffb464dae842f600bed1aab2088d7","sha256:a07e018adda99b601321947dd1c5be4a5357a6737669a955052643602a28aa6b"],"state_sha256":"81a70e8197723634c82a47bec28ed8103ff45826ecba4a2e6bba3d108b0bf7f8"}