{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:MDXZ3G5744PKECMSAVZC4K5HNV","short_pith_number":"pith:MDXZ3G57","canonical_record":{"source":{"id":"1208.1884","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2012-08-09T12:16:52Z","cross_cats_sorted":[],"title_canon_sha256":"41f45c7329007b87b989db77af86dadfcae01a2588a9896199c232dc58616e2c","abstract_canon_sha256":"5bd0dbf0b9b380ee543ae532d0c8b912ec6e91357fc793ddcafb09860fb8bde4"},"schema_version":"1.0"},"canonical_sha256":"60ef9d9bbfe71ea2099205722e2ba76d7bddd2c7b375bf69f6b92a2cd1050e57","source":{"kind":"arxiv","id":"1208.1884","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.1884","created_at":"2026-05-18T01:55:17Z"},{"alias_kind":"arxiv_version","alias_value":"1208.1884v2","created_at":"2026-05-18T01:55:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.1884","created_at":"2026-05-18T01:55:17Z"},{"alias_kind":"pith_short_12","alias_value":"MDXZ3G5744PK","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"MDXZ3G5744PKECMS","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"MDXZ3G57","created_at":"2026-05-18T12:27:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:MDXZ3G5744PKECMSAVZC4K5HNV","target":"record","payload":{"canonical_record":{"source":{"id":"1208.1884","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2012-08-09T12:16:52Z","cross_cats_sorted":[],"title_canon_sha256":"41f45c7329007b87b989db77af86dadfcae01a2588a9896199c232dc58616e2c","abstract_canon_sha256":"5bd0dbf0b9b380ee543ae532d0c8b912ec6e91357fc793ddcafb09860fb8bde4"},"schema_version":"1.0"},"canonical_sha256":"60ef9d9bbfe71ea2099205722e2ba76d7bddd2c7b375bf69f6b92a2cd1050e57","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:55:17.180970Z","signature_b64":"Jq5MwtxPJ2PIUBxWYDZRzTHYfjyauKiSdLUa9GStEHTlNbNgBtZwV+ggHVFGO5ZQoLtg8uDsRiCSmlqKiBDcBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"60ef9d9bbfe71ea2099205722e2ba76d7bddd2c7b375bf69f6b92a2cd1050e57","last_reissued_at":"2026-05-18T01:55:17.180442Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:55:17.180442Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1208.1884","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:55:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"I8s1eZnJaRotTlFDUU1hK+Zvy/tXcwDVcHcayOrByVLI08xFP9elJYBMnMV/S9Vo27xfApmUwCrH8F288VKUBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T18:07:05.877897Z"},"content_sha256":"7c727198fc066a39420fedb6bb698ec338e90d68900e12f8dea320aed9194792","schema_version":"1.0","event_id":"sha256:7c727198fc066a39420fedb6bb698ec338e90d68900e12f8dea320aed9194792"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:MDXZ3G5744PKECMSAVZC4K5HNV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Steady-state signatures of radiation trapping by cold multilevel atoms","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"Nicolas Mercadier, Quentin Baudouin, Robin Kaiser","submitted_at":"2012-08-09T12:16:52Z","abstract_excerpt":"In this paper, we use steady-state measurements to obtain evidence of radiation trapping in an optically thick a cloud of cold rubidium atoms. We investigate the fluorescence properties of our sample, pumped on opened transitions. The intensity of fluorescence exhibits a non trivial dependence on the optical thickness of the media. A simplified model, based on rate equations self-consistently coupled to a diffusive model of light transport, is used to explain the experimental observations in terms of incoherent radiation trapping on one spectral line. Measurements of atomic populations and flu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.1884","kind":"arxiv","version":2},"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":"2026-05-18T01:55:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HlrDUWqU0Es5/D0M5dWACx/A+rE34bS90pbK11zneC96GCkELFQGcvdmcTUyF9qgtMBDlZm2lercU5XsczWRBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T18:07:05.878266Z"},"content_sha256":"0728fad96c33f44c8030999d8c1c029c17d2c0df47840b649661f05165f5c09a","schema_version":"1.0","event_id":"sha256:0728fad96c33f44c8030999d8c1c029c17d2c0df47840b649661f05165f5c09a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MDXZ3G5744PKECMSAVZC4K5HNV/bundle.json","state_url":"https://pith.science/pith/MDXZ3G5744PKECMSAVZC4K5HNV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MDXZ3G5744PKECMSAVZC4K5HNV/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":"2026-06-06T18:07:05Z","links":{"resolver":"https://pith.science/pith/MDXZ3G5744PKECMSAVZC4K5HNV","bundle":"https://pith.science/pith/MDXZ3G5744PKECMSAVZC4K5HNV/bundle.json","state":"https://pith.science/pith/MDXZ3G5744PKECMSAVZC4K5HNV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MDXZ3G5744PKECMSAVZC4K5HNV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:MDXZ3G5744PKECMSAVZC4K5HNV","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":"5bd0dbf0b9b380ee543ae532d0c8b912ec6e91357fc793ddcafb09860fb8bde4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2012-08-09T12:16:52Z","title_canon_sha256":"41f45c7329007b87b989db77af86dadfcae01a2588a9896199c232dc58616e2c"},"schema_version":"1.0","source":{"id":"1208.1884","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.1884","created_at":"2026-05-18T01:55:17Z"},{"alias_kind":"arxiv_version","alias_value":"1208.1884v2","created_at":"2026-05-18T01:55:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.1884","created_at":"2026-05-18T01:55:17Z"},{"alias_kind":"pith_short_12","alias_value":"MDXZ3G5744PK","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"MDXZ3G5744PKECMS","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"MDXZ3G57","created_at":"2026-05-18T12:27:14Z"}],"graph_snapshots":[{"event_id":"sha256:0728fad96c33f44c8030999d8c1c029c17d2c0df47840b649661f05165f5c09a","target":"graph","created_at":"2026-05-18T01:55:17Z","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 this paper, we use steady-state measurements to obtain evidence of radiation trapping in an optically thick a cloud of cold rubidium atoms. We investigate the fluorescence properties of our sample, pumped on opened transitions. The intensity of fluorescence exhibits a non trivial dependence on the optical thickness of the media. A simplified model, based on rate equations self-consistently coupled to a diffusive model of light transport, is used to explain the experimental observations in terms of incoherent radiation trapping on one spectral line. Measurements of atomic populations and flu","authors_text":"Nicolas Mercadier, Quentin Baudouin, Robin Kaiser","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2012-08-09T12:16:52Z","title":"Steady-state signatures of radiation trapping by cold multilevel atoms"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.1884","kind":"arxiv","version":2},"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":"sha256:7c727198fc066a39420fedb6bb698ec338e90d68900e12f8dea320aed9194792","target":"record","created_at":"2026-05-18T01:55:17Z","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":"5bd0dbf0b9b380ee543ae532d0c8b912ec6e91357fc793ddcafb09860fb8bde4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2012-08-09T12:16:52Z","title_canon_sha256":"41f45c7329007b87b989db77af86dadfcae01a2588a9896199c232dc58616e2c"},"schema_version":"1.0","source":{"id":"1208.1884","kind":"arxiv","version":2}},"canonical_sha256":"60ef9d9bbfe71ea2099205722e2ba76d7bddd2c7b375bf69f6b92a2cd1050e57","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"60ef9d9bbfe71ea2099205722e2ba76d7bddd2c7b375bf69f6b92a2cd1050e57","first_computed_at":"2026-05-18T01:55:17.180442Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:55:17.180442Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Jq5MwtxPJ2PIUBxWYDZRzTHYfjyauKiSdLUa9GStEHTlNbNgBtZwV+ggHVFGO5ZQoLtg8uDsRiCSmlqKiBDcBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:55:17.180970Z","signed_message":"canonical_sha256_bytes"},"source_id":"1208.1884","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7c727198fc066a39420fedb6bb698ec338e90d68900e12f8dea320aed9194792","sha256:0728fad96c33f44c8030999d8c1c029c17d2c0df47840b649661f05165f5c09a"],"state_sha256":"42181b1f21c22ec09bb01c6a51a4765437d111850d89f0633eaf9850a5560a36"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1SJiIw8tJYvYu8SheoENEFL+tn4GHCjHEzPhF9Pb9sXAkEtNtcFLN/73nACtk8C3jnBRtw/rnmHxRPUKsKJFAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T18:07:05.880935Z","bundle_sha256":"82f6bd1403a7ee856da7346af48b49012a43286ee9508b48372104828c501782"}}