{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:2OI6TIJOTNPQVFU36GT2RAQ7MJ","short_pith_number":"pith:2OI6TIJO","schema_version":"1.0","canonical_sha256":"d391e9a12e9b5f0a969bf1a7a8821f627700d41906b1f09868ea0afd8d7b5e60","source":{"kind":"arxiv","id":"1211.5437","version":1},"attestation_state":"computed","paper":{"title":"Direct two-photon excitation of isomeric transition in thorium-229 nucleus","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"physics.atom-ph","authors_text":"A. N. Litvinov, A. V. Romanenko, G. A. Kazakov, L. P. Yatsenko, V. I. Romanenko, Ye. G. Udoviskaya","submitted_at":"2012-11-23T08:55:40Z","abstract_excerpt":"A possibility of the two-photon excitation of an isomeric state in a nucleus of thorium-229 has been discussed. The fluorescence intensity of the excitation is demonstrated to be identical for the irradiation of nuclei with either monochromatic light or polychromatic radiation consisting of a sequence of short light pulses of the same intensity. The two-photon excitation of Th^{3+} ion in an electromagnetic trap with a focused laser beam with a wavelength of about 320 nm and power of 100 mW can lead to the absorption saturation, at which the fluorescence emission with the frequency of the tran"},"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":"1211.5437","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2012-11-23T08:55:40Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"be966e59b6103e3bce590bf6389286622f726430cb41a4012edb9ac08b5c8c0c","abstract_canon_sha256":"5baa624bff774352dc3458771c0bced7ca24d33215c9385cd1a91e1dccc6dd3f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:40:04.405222Z","signature_b64":"3ZdGDx2tFUyLr3/MeXhCR/tRKbwpOopT/VHp1huBLKEO+ydj59n7TWnAVVdgnwyvJGsG8VRm0cxcPVONRgi8Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d391e9a12e9b5f0a969bf1a7a8821f627700d41906b1f09868ea0afd8d7b5e60","last_reissued_at":"2026-05-18T03:40:04.404567Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:40:04.404567Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Direct two-photon excitation of isomeric transition in thorium-229 nucleus","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"physics.atom-ph","authors_text":"A. N. Litvinov, A. V. Romanenko, G. A. Kazakov, L. P. Yatsenko, V. I. Romanenko, Ye. G. Udoviskaya","submitted_at":"2012-11-23T08:55:40Z","abstract_excerpt":"A possibility of the two-photon excitation of an isomeric state in a nucleus of thorium-229 has been discussed. The fluorescence intensity of the excitation is demonstrated to be identical for the irradiation of nuclei with either monochromatic light or polychromatic radiation consisting of a sequence of short light pulses of the same intensity. The two-photon excitation of Th^{3+} ion in an electromagnetic trap with a focused laser beam with a wavelength of about 320 nm and power of 100 mW can lead to the absorption saturation, at which the fluorescence emission with the frequency of the tran"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.5437","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1211.5437","created_at":"2026-05-18T03:40:04.404676+00:00"},{"alias_kind":"arxiv_version","alias_value":"1211.5437v1","created_at":"2026-05-18T03:40:04.404676+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.5437","created_at":"2026-05-18T03:40:04.404676+00:00"},{"alias_kind":"pith_short_12","alias_value":"2OI6TIJOTNPQ","created_at":"2026-05-18T12:26:50.516681+00:00"},{"alias_kind":"pith_short_16","alias_value":"2OI6TIJOTNPQVFU3","created_at":"2026-05-18T12:26:50.516681+00:00"},{"alias_kind":"pith_short_8","alias_value":"2OI6TIJO","created_at":"2026-05-18T12:26:50.516681+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/2OI6TIJOTNPQVFU36GT2RAQ7MJ","json":"https://pith.science/pith/2OI6TIJOTNPQVFU36GT2RAQ7MJ.json","graph_json":"https://pith.science/api/pith-number/2OI6TIJOTNPQVFU36GT2RAQ7MJ/graph.json","events_json":"https://pith.science/api/pith-number/2OI6TIJOTNPQVFU36GT2RAQ7MJ/events.json","paper":"https://pith.science/paper/2OI6TIJO"},"agent_actions":{"view_html":"https://pith.science/pith/2OI6TIJOTNPQVFU36GT2RAQ7MJ","download_json":"https://pith.science/pith/2OI6TIJOTNPQVFU36GT2RAQ7MJ.json","view_paper":"https://pith.science/paper/2OI6TIJO","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1211.5437&json=true","fetch_graph":"https://pith.science/api/pith-number/2OI6TIJOTNPQVFU36GT2RAQ7MJ/graph.json","fetch_events":"https://pith.science/api/pith-number/2OI6TIJOTNPQVFU36GT2RAQ7MJ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2OI6TIJOTNPQVFU36GT2RAQ7MJ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2OI6TIJOTNPQVFU36GT2RAQ7MJ/action/storage_attestation","attest_author":"https://pith.science/pith/2OI6TIJOTNPQVFU36GT2RAQ7MJ/action/author_attestation","sign_citation":"https://pith.science/pith/2OI6TIJOTNPQVFU36GT2RAQ7MJ/action/citation_signature","submit_replication":"https://pith.science/pith/2OI6TIJOTNPQVFU36GT2RAQ7MJ/action/replication_record"}},"created_at":"2026-05-18T03:40:04.404676+00:00","updated_at":"2026-05-18T03:40:04.404676+00:00"}