{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:MZ2WWKE5FGOFMMID3YYUKVSRFK","short_pith_number":"pith:MZ2WWKE5","schema_version":"1.0","canonical_sha256":"66756b289d299c563103de314556512a938c2a40574e9a017e82f37aa7b9b3a4","source":{"kind":"arxiv","id":"1906.04105","version":4},"attestation_state":"computed","paper":{"title":"Part-per-billion measurement of the $4^2S_{1/2} \\rightarrow 3^2D_{5/2}$ electric quadrupole transition isotope shifts between $^{42,44,48}$Ca$^+$ and $^{40}$Ca$^+$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"Ashay N. Patel, Felix W. Knollmann, S. Charles Doret","submitted_at":"2019-06-10T16:26:14Z","abstract_excerpt":"We report a precise measurement of the isotope shifts in the $4^2$S$_{1/2} \\rightarrow 3^2$D$_{5/2}$ electric quadrupole transition at 729~nm in the $^{40 - 42,44,48}$Ca$^+$. The measurement has been made via high-resolution laser spectroscopy of co-trapped ions, finding measured shifts of 2,771,872,467.6(7.6), 5,340,887,394.6(7.8), and 9,990,382,525.0(4.9) Hz between $^{42,44,48}$Ca$^+$and $^{40}$Ca$^+$, respectively. By exciting the two isotopes simultaneously using frequency sidebands derived from a single laser systematic uncertainties resulting from laser frequency drifts are eliminated. "},"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":"1906.04105","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-06-10T16:26:14Z","cross_cats_sorted":[],"title_canon_sha256":"e76000fa81a8851b4e2c78acfc448fe82fd1ff72eeb777508a902e0dff4047d6","abstract_canon_sha256":"b3a05049e5e61246c74736ea681e10872e57dba932e0a196c523a30b0b45fe39"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:12:29.244191Z","signature_b64":"6DyC/0tTs0i+4KPdBybUnPv+NBOHeLBvBnD0Zja6RPFtjK5j46o3D5nVx+a1BZy/BsAjwJq/XjOSABa+dR6JBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"66756b289d299c563103de314556512a938c2a40574e9a017e82f37aa7b9b3a4","last_reissued_at":"2026-07-05T06:12:29.243739Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:12:29.243739Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Part-per-billion measurement of the $4^2S_{1/2} \\rightarrow 3^2D_{5/2}$ electric quadrupole transition isotope shifts between $^{42,44,48}$Ca$^+$ and $^{40}$Ca$^+$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"Ashay N. Patel, Felix W. Knollmann, S. Charles Doret","submitted_at":"2019-06-10T16:26:14Z","abstract_excerpt":"We report a precise measurement of the isotope shifts in the $4^2$S$_{1/2} \\rightarrow 3^2$D$_{5/2}$ electric quadrupole transition at 729~nm in the $^{40 - 42,44,48}$Ca$^+$. The measurement has been made via high-resolution laser spectroscopy of co-trapped ions, finding measured shifts of 2,771,872,467.6(7.6), 5,340,887,394.6(7.8), and 9,990,382,525.0(4.9) Hz between $^{42,44,48}$Ca$^+$and $^{40}$Ca$^+$, respectively. By exciting the two isotopes simultaneously using frequency sidebands derived from a single laser systematic uncertainties resulting from laser frequency drifts are eliminated. "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.04105","kind":"arxiv","version":4},"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/1906.04105/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":"1906.04105","created_at":"2026-07-05T06:12:29.243795+00:00"},{"alias_kind":"arxiv_version","alias_value":"1906.04105v4","created_at":"2026-07-05T06:12:29.243795+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.04105","created_at":"2026-07-05T06:12:29.243795+00:00"},{"alias_kind":"pith_short_12","alias_value":"MZ2WWKE5FGOF","created_at":"2026-07-05T06:12:29.243795+00:00"},{"alias_kind":"pith_short_16","alias_value":"MZ2WWKE5FGOFMMID","created_at":"2026-07-05T06:12:29.243795+00:00"},{"alias_kind":"pith_short_8","alias_value":"MZ2WWKE5","created_at":"2026-07-05T06:12:29.243795+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2506.07303","citing_title":"Towards a Global Search for New Physics with Isotope Shifts","ref_index":40,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/MZ2WWKE5FGOFMMID3YYUKVSRFK","json":"https://pith.science/pith/MZ2WWKE5FGOFMMID3YYUKVSRFK.json","graph_json":"https://pith.science/api/pith-number/MZ2WWKE5FGOFMMID3YYUKVSRFK/graph.json","events_json":"https://pith.science/api/pith-number/MZ2WWKE5FGOFMMID3YYUKVSRFK/events.json","paper":"https://pith.science/paper/MZ2WWKE5"},"agent_actions":{"view_html":"https://pith.science/pith/MZ2WWKE5FGOFMMID3YYUKVSRFK","download_json":"https://pith.science/pith/MZ2WWKE5FGOFMMID3YYUKVSRFK.json","view_paper":"https://pith.science/paper/MZ2WWKE5","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1906.04105&json=true","fetch_graph":"https://pith.science/api/pith-number/MZ2WWKE5FGOFMMID3YYUKVSRFK/graph.json","fetch_events":"https://pith.science/api/pith-number/MZ2WWKE5FGOFMMID3YYUKVSRFK/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/MZ2WWKE5FGOFMMID3YYUKVSRFK/action/timestamp_anchor","attest_storage":"https://pith.science/pith/MZ2WWKE5FGOFMMID3YYUKVSRFK/action/storage_attestation","attest_author":"https://pith.science/pith/MZ2WWKE5FGOFMMID3YYUKVSRFK/action/author_attestation","sign_citation":"https://pith.science/pith/MZ2WWKE5FGOFMMID3YYUKVSRFK/action/citation_signature","submit_replication":"https://pith.science/pith/MZ2WWKE5FGOFMMID3YYUKVSRFK/action/replication_record"}},"created_at":"2026-07-05T06:12:29.243795+00:00","updated_at":"2026-07-05T06:12:29.243795+00:00"}