{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:Y57VIGNCC27NQOYUDHR57CNRO4","short_pith_number":"pith:Y57VIGNC","canonical_record":{"source":{"id":"1105.4646","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2011-05-23T22:12:54Z","cross_cats_sorted":[],"title_canon_sha256":"e205434959462c5190e147d6051fab5336cba29b5f979c208426885eb685bf8f","abstract_canon_sha256":"788127bdd99dd2d9a785d20d4e2ea960fc6a4831ee0ef276feee5665b816f169"},"schema_version":"1.0"},"canonical_sha256":"c77f5419a216bed83b1419e3df89b1770cdc85331563363a631393bd8fab20e0","source":{"kind":"arxiv","id":"1105.4646","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1105.4646","created_at":"2026-05-18T02:01:52Z"},{"alias_kind":"arxiv_version","alias_value":"1105.4646v1","created_at":"2026-05-18T02:01:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1105.4646","created_at":"2026-05-18T02:01:52Z"},{"alias_kind":"pith_short_12","alias_value":"Y57VIGNCC27N","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_16","alias_value":"Y57VIGNCC27NQOYU","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_8","alias_value":"Y57VIGNC","created_at":"2026-05-18T12:26:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:Y57VIGNCC27NQOYUDHR57CNRO4","target":"record","payload":{"canonical_record":{"source":{"id":"1105.4646","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2011-05-23T22:12:54Z","cross_cats_sorted":[],"title_canon_sha256":"e205434959462c5190e147d6051fab5336cba29b5f979c208426885eb685bf8f","abstract_canon_sha256":"788127bdd99dd2d9a785d20d4e2ea960fc6a4831ee0ef276feee5665b816f169"},"schema_version":"1.0"},"canonical_sha256":"c77f5419a216bed83b1419e3df89b1770cdc85331563363a631393bd8fab20e0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:01:52.134416Z","signature_b64":"+oiLADdFt1mfUjub/YIuIA4GwyAJA3fxgOG5/4j9/rYxgIIauI9d7xD9TquCwUlshRK3VZm9Iyw3CapAN2Z9Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c77f5419a216bed83b1419e3df89b1770cdc85331563363a631393bd8fab20e0","last_reissued_at":"2026-05-18T02:01:52.133703Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:01:52.133703Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1105.4646","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":"2026-05-18T02:01:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jbGWXIpO2jEliEncMXZthQIztpZrJ0IhjwM6Z85476PiGgHtfPvdy/2WN/30Il4u14UrdJRcLwjkjtAIBsaqBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T22:14:58.013408Z"},"content_sha256":"3f81960340e15db3aaaf7fe41f565d55da121615edc3e61d8e90039e047f74b8","schema_version":"1.0","event_id":"sha256:3f81960340e15db3aaaf7fe41f565d55da121615edc3e61d8e90039e047f74b8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:Y57VIGNCC27NQOYUDHR57CNRO4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Resonance ionization spectroscopy of thorium isotopes - towards a laser spectroscopic identification of the low-lying 7.6 eV isomer of Th-229","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"Ian Moore, Klaus Wendt, Michael Reponen, Norbert Trautmann, Sebastian Raeder, Sebastian Rothe, Tina Gottwald, Volker Sonnenschein","submitted_at":"2011-05-23T22:12:54Z","abstract_excerpt":"In-source resonance ionization spectroscopy was used to identify an efficient and selective three step excitation/ionization scheme of thorium, suitable for titanium:sapphire (Ti:sa) lasers. The measurements were carried out in preparation of laser spectroscopic investigations for an identification of the low-lying Th-229m isomer predicted at 7.6 +- 0.5 eV above the nuclear ground state. Using a sample of Th-232, a multitude of optical transitions leading to over 20 previously unknown intermediate states of even parity as well as numerous high-lying odd parity auto-ionizing states were identif"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1105.4646","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":"2026-05-18T02:01:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3YIPWu2OdOGRwGXXL/Q+54DltJL2wT7O8HVWszzAPvOv4hNM+9p0oSZ7ExcmetEtf/GGvku+LVDRnZA4/1jpAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T22:14:58.013787Z"},"content_sha256":"73dd07da207e8f7ecc1cca5be3249b9c56404058105c6836b583d77ec5647a69","schema_version":"1.0","event_id":"sha256:73dd07da207e8f7ecc1cca5be3249b9c56404058105c6836b583d77ec5647a69"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Y57VIGNCC27NQOYUDHR57CNRO4/bundle.json","state_url":"https://pith.science/pith/Y57VIGNCC27NQOYUDHR57CNRO4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Y57VIGNCC27NQOYUDHR57CNRO4/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":"2026-05-27T22:14:58Z","links":{"resolver":"https://pith.science/pith/Y57VIGNCC27NQOYUDHR57CNRO4","bundle":"https://pith.science/pith/Y57VIGNCC27NQOYUDHR57CNRO4/bundle.json","state":"https://pith.science/pith/Y57VIGNCC27NQOYUDHR57CNRO4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Y57VIGNCC27NQOYUDHR57CNRO4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:Y57VIGNCC27NQOYUDHR57CNRO4","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":"788127bdd99dd2d9a785d20d4e2ea960fc6a4831ee0ef276feee5665b816f169","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2011-05-23T22:12:54Z","title_canon_sha256":"e205434959462c5190e147d6051fab5336cba29b5f979c208426885eb685bf8f"},"schema_version":"1.0","source":{"id":"1105.4646","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1105.4646","created_at":"2026-05-18T02:01:52Z"},{"alias_kind":"arxiv_version","alias_value":"1105.4646v1","created_at":"2026-05-18T02:01:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1105.4646","created_at":"2026-05-18T02:01:52Z"},{"alias_kind":"pith_short_12","alias_value":"Y57VIGNCC27N","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_16","alias_value":"Y57VIGNCC27NQOYU","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_8","alias_value":"Y57VIGNC","created_at":"2026-05-18T12:26:47Z"}],"graph_snapshots":[{"event_id":"sha256:73dd07da207e8f7ecc1cca5be3249b9c56404058105c6836b583d77ec5647a69","target":"graph","created_at":"2026-05-18T02:01:52Z","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":"In-source resonance ionization spectroscopy was used to identify an efficient and selective three step excitation/ionization scheme of thorium, suitable for titanium:sapphire (Ti:sa) lasers. The measurements were carried out in preparation of laser spectroscopic investigations for an identification of the low-lying Th-229m isomer predicted at 7.6 +- 0.5 eV above the nuclear ground state. Using a sample of Th-232, a multitude of optical transitions leading to over 20 previously unknown intermediate states of even parity as well as numerous high-lying odd parity auto-ionizing states were identif","authors_text":"Ian Moore, Klaus Wendt, Michael Reponen, Norbert Trautmann, Sebastian Raeder, Sebastian Rothe, Tina Gottwald, Volker Sonnenschein","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2011-05-23T22:12:54Z","title":"Resonance ionization spectroscopy of thorium isotopes - towards a laser spectroscopic identification of the low-lying 7.6 eV isomer of Th-229"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1105.4646","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":"sha256:3f81960340e15db3aaaf7fe41f565d55da121615edc3e61d8e90039e047f74b8","target":"record","created_at":"2026-05-18T02:01:52Z","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":"788127bdd99dd2d9a785d20d4e2ea960fc6a4831ee0ef276feee5665b816f169","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2011-05-23T22:12:54Z","title_canon_sha256":"e205434959462c5190e147d6051fab5336cba29b5f979c208426885eb685bf8f"},"schema_version":"1.0","source":{"id":"1105.4646","kind":"arxiv","version":1}},"canonical_sha256":"c77f5419a216bed83b1419e3df89b1770cdc85331563363a631393bd8fab20e0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c77f5419a216bed83b1419e3df89b1770cdc85331563363a631393bd8fab20e0","first_computed_at":"2026-05-18T02:01:52.133703Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:01:52.133703Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+oiLADdFt1mfUjub/YIuIA4GwyAJA3fxgOG5/4j9/rYxgIIauI9d7xD9TquCwUlshRK3VZm9Iyw3CapAN2Z9Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:01:52.134416Z","signed_message":"canonical_sha256_bytes"},"source_id":"1105.4646","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3f81960340e15db3aaaf7fe41f565d55da121615edc3e61d8e90039e047f74b8","sha256:73dd07da207e8f7ecc1cca5be3249b9c56404058105c6836b583d77ec5647a69"],"state_sha256":"79058ba4173b41e4ab8680d1de94fbcc5958cf3ccb06e1c77d74c31a09cb1d7b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z3ABYTGBnDU3tk3kyeJo0nstn5lXUrtTaxYBKMDl5hQa2Nv7AgyyoIAh0ixExZCmiRsLJ4sXcIVdYB04YxoFBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T22:14:58.016028Z","bundle_sha256":"61dce97cefe763467e6bec1ade1422c87f71cf748c7e1fdc8d72c141e1d1dbc6"}}