{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:UJABBYVNK45IGNYNIA3MQQA45T","short_pith_number":"pith:UJABBYVN","canonical_record":{"source":{"id":"1809.08115","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-09-21T13:46:27Z","cross_cats_sorted":[],"title_canon_sha256":"ee6d73394080260dd5adc4bcb111f3fa712acf87b5043c0bbb21ff2595e58474","abstract_canon_sha256":"e15d0dea332d65897e2d841f78a0d5781dc6adc3ff00f9cec569560e9210efc6"},"schema_version":"1.0"},"canonical_sha256":"a24010e2ad573a83370d4036c8401cecd4abe914937c3d72fd58857eee0e28bf","source":{"kind":"arxiv","id":"1809.08115","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.08115","created_at":"2026-05-18T00:01:21Z"},{"alias_kind":"arxiv_version","alias_value":"1809.08115v2","created_at":"2026-05-18T00:01:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.08115","created_at":"2026-05-18T00:01:21Z"},{"alias_kind":"pith_short_12","alias_value":"UJABBYVNK45I","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"UJABBYVNK45IGNYN","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"UJABBYVN","created_at":"2026-05-18T12:32:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:UJABBYVNK45IGNYNIA3MQQA45T","target":"record","payload":{"canonical_record":{"source":{"id":"1809.08115","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-09-21T13:46:27Z","cross_cats_sorted":[],"title_canon_sha256":"ee6d73394080260dd5adc4bcb111f3fa712acf87b5043c0bbb21ff2595e58474","abstract_canon_sha256":"e15d0dea332d65897e2d841f78a0d5781dc6adc3ff00f9cec569560e9210efc6"},"schema_version":"1.0"},"canonical_sha256":"a24010e2ad573a83370d4036c8401cecd4abe914937c3d72fd58857eee0e28bf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:01:21.560934Z","signature_b64":"Hihv6jxPOfpiX922r7TmJcsIPyIJmwAKbWMFApTNYSi7absUbKad4nK9Rd5wY+qK4pLw25ppkpeqyU/Kh5YuBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a24010e2ad573a83370d4036c8401cecd4abe914937c3d72fd58857eee0e28bf","last_reissued_at":"2026-05-18T00:01:21.560352Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:01:21.560352Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1809.08115","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":"2026-05-18T00:01:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+eT9svPnXO0anA06m5nuvmPjaswPx6ay6T6DBBmtqaygfEH0VM349RZnUcC34hyaQibg4SYWoTYzv4TGqjGCAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T23:02:29.384061Z"},"content_sha256":"e3ee2f8d963a903c0ca1d5ddff294bb73bab52b44aa710185215059801c81e42","schema_version":"1.0","event_id":"sha256:e3ee2f8d963a903c0ca1d5ddff294bb73bab52b44aa710185215059801c81e42"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:UJABBYVNK45IGNYNIA3MQQA45T","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Free ion yield of Trimethyl Bismuth used as sensitive medium for high-energy photon detection","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"D. Yvon, G. Tauzin, J-P. Bard, J-P. Dognon, J-Ph. Mols, M. Farrad\\`eche, P. Verrecchia, V. Dauvois, V. Sharyy, X. Mancardi","submitted_at":"2018-09-21T13:46:27Z","abstract_excerpt":"The CaLIPSO project is an innovative high-energy photon detector concept using trimethylbismuth as sensitive medium in a liquid ionization chamber. The detector, designed for high precision brain PET imaging, works as a time-projection chamber and detects Cherenkov light and charge signal. We measured the free ion yield of trimethylbismuth, which represents the number of electron-ion pairs released by the incident photon. To do so, we developed a low-noise measuring system to determine the current induced by a 60Co source in the liquid with an accuracy better than 5 fA for an electric field up"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.08115","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":"2026-05-18T00:01:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J7QRKsyVpgzvz+ClgUve84VH4G068NeUrfvEOxQdKkTk6+T+9C3AyJmO3hShzRlaI7eoM9mhAokWis8RhVvLCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T23:02:29.384760Z"},"content_sha256":"303832c97f2bb8c3d381fb6fe1d15b80937a6905ca6222619beea9437df41e60","schema_version":"1.0","event_id":"sha256:303832c97f2bb8c3d381fb6fe1d15b80937a6905ca6222619beea9437df41e60"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UJABBYVNK45IGNYNIA3MQQA45T/bundle.json","state_url":"https://pith.science/pith/UJABBYVNK45IGNYNIA3MQQA45T/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UJABBYVNK45IGNYNIA3MQQA45T/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":"2026-06-05T23:02:29Z","links":{"resolver":"https://pith.science/pith/UJABBYVNK45IGNYNIA3MQQA45T","bundle":"https://pith.science/pith/UJABBYVNK45IGNYNIA3MQQA45T/bundle.json","state":"https://pith.science/pith/UJABBYVNK45IGNYNIA3MQQA45T/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UJABBYVNK45IGNYNIA3MQQA45T/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:UJABBYVNK45IGNYNIA3MQQA45T","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":"e15d0dea332d65897e2d841f78a0d5781dc6adc3ff00f9cec569560e9210efc6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-09-21T13:46:27Z","title_canon_sha256":"ee6d73394080260dd5adc4bcb111f3fa712acf87b5043c0bbb21ff2595e58474"},"schema_version":"1.0","source":{"id":"1809.08115","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.08115","created_at":"2026-05-18T00:01:21Z"},{"alias_kind":"arxiv_version","alias_value":"1809.08115v2","created_at":"2026-05-18T00:01:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.08115","created_at":"2026-05-18T00:01:21Z"},{"alias_kind":"pith_short_12","alias_value":"UJABBYVNK45I","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"UJABBYVNK45IGNYN","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"UJABBYVN","created_at":"2026-05-18T12:32:56Z"}],"graph_snapshots":[{"event_id":"sha256:303832c97f2bb8c3d381fb6fe1d15b80937a6905ca6222619beea9437df41e60","target":"graph","created_at":"2026-05-18T00:01:21Z","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":"The CaLIPSO project is an innovative high-energy photon detector concept using trimethylbismuth as sensitive medium in a liquid ionization chamber. The detector, designed for high precision brain PET imaging, works as a time-projection chamber and detects Cherenkov light and charge signal. We measured the free ion yield of trimethylbismuth, which represents the number of electron-ion pairs released by the incident photon. To do so, we developed a low-noise measuring system to determine the current induced by a 60Co source in the liquid with an accuracy better than 5 fA for an electric field up","authors_text":"D. Yvon, G. Tauzin, J-P. Bard, J-P. Dognon, J-Ph. Mols, M. Farrad\\`eche, P. Verrecchia, V. Dauvois, V. Sharyy, X. Mancardi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-09-21T13:46:27Z","title":"Free ion yield of Trimethyl Bismuth used as sensitive medium for high-energy photon detection"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.08115","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:e3ee2f8d963a903c0ca1d5ddff294bb73bab52b44aa710185215059801c81e42","target":"record","created_at":"2026-05-18T00:01:21Z","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":"e15d0dea332d65897e2d841f78a0d5781dc6adc3ff00f9cec569560e9210efc6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2018-09-21T13:46:27Z","title_canon_sha256":"ee6d73394080260dd5adc4bcb111f3fa712acf87b5043c0bbb21ff2595e58474"},"schema_version":"1.0","source":{"id":"1809.08115","kind":"arxiv","version":2}},"canonical_sha256":"a24010e2ad573a83370d4036c8401cecd4abe914937c3d72fd58857eee0e28bf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a24010e2ad573a83370d4036c8401cecd4abe914937c3d72fd58857eee0e28bf","first_computed_at":"2026-05-18T00:01:21.560352Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:01:21.560352Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Hihv6jxPOfpiX922r7TmJcsIPyIJmwAKbWMFApTNYSi7absUbKad4nK9Rd5wY+qK4pLw25ppkpeqyU/Kh5YuBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:01:21.560934Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.08115","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e3ee2f8d963a903c0ca1d5ddff294bb73bab52b44aa710185215059801c81e42","sha256:303832c97f2bb8c3d381fb6fe1d15b80937a6905ca6222619beea9437df41e60"],"state_sha256":"06285b04c05754acdefef832ef2f14941070c081f85022a6b0fd45bc137e7c05"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JDhs/m5x/CC8k8wv/Pz5sZIAqHvYdHqRNgrBanPeGNGqh+f0yUDB/avpJABcISzApLEO8qyHN3x0VQxyBH2BDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T23:02:29.388981Z","bundle_sha256":"55be10eda1614b9a46c73254a9d2f5a6ec037add569b523328f4648667bdf1d1"}}