{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:VK7BWD6VVDO5BTWAMLEAET6NNJ","short_pith_number":"pith:VK7BWD6V","canonical_record":{"source":{"id":"physics/0703199","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"physics.ins-det","submitted_at":"2007-03-21T09:20:51Z","cross_cats_sorted":[],"title_canon_sha256":"26acf5c5e35e7a102f8e8821492ee1a731ec66854f23730cb04b20d9b5f0e918","abstract_canon_sha256":"352f61e3dbcda8a7a7e57b6d8e643de8c1c884b35b66158cd3ba82f637b893d5"},"schema_version":"1.0"},"canonical_sha256":"aabe1b0fd5a8ddd0cec062c8024fcd6a448a5a2b03444448ebca2728cf7802bc","source":{"kind":"arxiv","id":"physics/0703199","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"physics/0703199","created_at":"2026-07-04T15:22:16Z"},{"alias_kind":"arxiv_version","alias_value":"physics/0703199v1","created_at":"2026-07-04T15:22:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.physics/0703199","created_at":"2026-07-04T15:22:16Z"},{"alias_kind":"pith_short_12","alias_value":"VK7BWD6VVDO5","created_at":"2026-07-04T15:22:16Z"},{"alias_kind":"pith_short_16","alias_value":"VK7BWD6VVDO5BTWA","created_at":"2026-07-04T15:22:16Z"},{"alias_kind":"pith_short_8","alias_value":"VK7BWD6V","created_at":"2026-07-04T15:22:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:VK7BWD6VVDO5BTWAMLEAET6NNJ","target":"record","payload":{"canonical_record":{"source":{"id":"physics/0703199","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"physics.ins-det","submitted_at":"2007-03-21T09:20:51Z","cross_cats_sorted":[],"title_canon_sha256":"26acf5c5e35e7a102f8e8821492ee1a731ec66854f23730cb04b20d9b5f0e918","abstract_canon_sha256":"352f61e3dbcda8a7a7e57b6d8e643de8c1c884b35b66158cd3ba82f637b893d5"},"schema_version":"1.0"},"canonical_sha256":"aabe1b0fd5a8ddd0cec062c8024fcd6a448a5a2b03444448ebca2728cf7802bc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:22:16.107387Z","signature_b64":"80EKorpHMtm9P2M0xZdqj0VjnI9EYlBRAv21cg6mDrz3hWO09gquDJgmHEYTmoYHcne0CyzBbp7750GY9jzUAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aabe1b0fd5a8ddd0cec062c8024fcd6a448a5a2b03444448ebca2728cf7802bc","last_reissued_at":"2026-07-04T15:22:16.106947Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:22:16.106947Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"physics/0703199","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":"2026-07-04T15:22:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ke7yDoCJASz1u8Gy1K0FBeTw7HmmAi2hILSNRwlUk/xSPx9seKRICUD8kEDYJTCoLtZcUK5/KPuUHRuEhnkQBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T11:55:00.635731Z"},"content_sha256":"08a035e8f64fc56950d4bbe4416ffc609d3d40c44b6e74c7ecc5af116b04b978","schema_version":"1.0","event_id":"sha256:08a035e8f64fc56950d4bbe4416ffc609d3d40c44b6e74c7ecc5af116b04b978"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:VK7BWD6VVDO5BTWAMLEAET6NNJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First study of radiation hardness of lead tungstate crystals at low temperatures","license":"","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"A.A.Derevschikov, A.A.Vasiliev, A.M.Davidenko, A.N.Vasiliev, A.P.Meschanin, A.V.Mochalov, A.V.Ryazantsev, A.V.Uzunian, G.Tamulaitis, M.S.Ippolitov, N.G.Minaev, P.A.Semenov, R.Novotny, S.F.Burachas, V.A.Kachanov, V.Manko, V.V.Mochalov, V.Y.Khodyrev, Y.M.Goncharenko, Y.M.Melnick","submitted_at":"2007-03-21T09:20:51Z","abstract_excerpt":"The electromagnetic calorimeter of PANDA at the FAIR facility will rely on an operation of lead tungstate (PWO) scintillation crystals at temperatures near -25 deg.C to provide sufficient resolution for photons in the energy range from 8 GeV down to 10 MeV. Radiation hardness of PWO crystals was studied at the IHEP (Protvino) irradiation facility in the temperature range from room temperature down to -25 deg.C. These studies have indicated a significantly different behaviour in the time evolution of the damaging processes well below room temperature. Different signal loss levels at the same do"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"physics/0703199","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/physics/0703199/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T15:22:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d34mBgPJPIyoJ+sbcquRZWlvw2B5lxdBVR2+Zc/W19icC2faMwvsc0Qb3tqoImB2Q/obvWytUijktN4snpguCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T11:55:00.636578Z"},"content_sha256":"9104f8e34a5a33670cf3f6ce382547e368c68cc2481e7523c9e4dfe1a2541090","schema_version":"1.0","event_id":"sha256:9104f8e34a5a33670cf3f6ce382547e368c68cc2481e7523c9e4dfe1a2541090"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VK7BWD6VVDO5BTWAMLEAET6NNJ/bundle.json","state_url":"https://pith.science/pith/VK7BWD6VVDO5BTWAMLEAET6NNJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VK7BWD6VVDO5BTWAMLEAET6NNJ/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":"2026-08-04T11:55:00Z","links":{"resolver":"https://pith.science/pith/VK7BWD6VVDO5BTWAMLEAET6NNJ","bundle":"https://pith.science/pith/VK7BWD6VVDO5BTWAMLEAET6NNJ/bundle.json","state":"https://pith.science/pith/VK7BWD6VVDO5BTWAMLEAET6NNJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VK7BWD6VVDO5BTWAMLEAET6NNJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:VK7BWD6VVDO5BTWAMLEAET6NNJ","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":"352f61e3dbcda8a7a7e57b6d8e643de8c1c884b35b66158cd3ba82f637b893d5","cross_cats_sorted":[],"license":"","primary_cat":"physics.ins-det","submitted_at":"2007-03-21T09:20:51Z","title_canon_sha256":"26acf5c5e35e7a102f8e8821492ee1a731ec66854f23730cb04b20d9b5f0e918"},"schema_version":"1.0","source":{"id":"physics/0703199","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"physics/0703199","created_at":"2026-07-04T15:22:16Z"},{"alias_kind":"arxiv_version","alias_value":"physics/0703199v1","created_at":"2026-07-04T15:22:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.physics/0703199","created_at":"2026-07-04T15:22:16Z"},{"alias_kind":"pith_short_12","alias_value":"VK7BWD6VVDO5","created_at":"2026-07-04T15:22:16Z"},{"alias_kind":"pith_short_16","alias_value":"VK7BWD6VVDO5BTWA","created_at":"2026-07-04T15:22:16Z"},{"alias_kind":"pith_short_8","alias_value":"VK7BWD6V","created_at":"2026-07-04T15:22:16Z"}],"graph_snapshots":[{"event_id":"sha256:9104f8e34a5a33670cf3f6ce382547e368c68cc2481e7523c9e4dfe1a2541090","target":"graph","created_at":"2026-07-04T15:22:16Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/physics/0703199/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The electromagnetic calorimeter of PANDA at the FAIR facility will rely on an operation of lead tungstate (PWO) scintillation crystals at temperatures near -25 deg.C to provide sufficient resolution for photons in the energy range from 8 GeV down to 10 MeV. Radiation hardness of PWO crystals was studied at the IHEP (Protvino) irradiation facility in the temperature range from room temperature down to -25 deg.C. These studies have indicated a significantly different behaviour in the time evolution of the damaging processes well below room temperature. Different signal loss levels at the same do","authors_text":"A.A.Derevschikov, A.A.Vasiliev, A.M.Davidenko, A.N.Vasiliev, A.P.Meschanin, A.V.Mochalov, A.V.Ryazantsev, A.V.Uzunian, G.Tamulaitis, M.S.Ippolitov, N.G.Minaev, P.A.Semenov, R.Novotny, S.F.Burachas, V.A.Kachanov, V.Manko, V.V.Mochalov, V.Y.Khodyrev, Y.M.Goncharenko, Y.M.Melnick","cross_cats":[],"headline":"","license":"","primary_cat":"physics.ins-det","submitted_at":"2007-03-21T09:20:51Z","title":"First study of radiation hardness of lead tungstate crystals at low temperatures"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"physics/0703199","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":"sha256:08a035e8f64fc56950d4bbe4416ffc609d3d40c44b6e74c7ecc5af116b04b978","target":"record","created_at":"2026-07-04T15:22:16Z","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":"352f61e3dbcda8a7a7e57b6d8e643de8c1c884b35b66158cd3ba82f637b893d5","cross_cats_sorted":[],"license":"","primary_cat":"physics.ins-det","submitted_at":"2007-03-21T09:20:51Z","title_canon_sha256":"26acf5c5e35e7a102f8e8821492ee1a731ec66854f23730cb04b20d9b5f0e918"},"schema_version":"1.0","source":{"id":"physics/0703199","kind":"arxiv","version":1}},"canonical_sha256":"aabe1b0fd5a8ddd0cec062c8024fcd6a448a5a2b03444448ebca2728cf7802bc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aabe1b0fd5a8ddd0cec062c8024fcd6a448a5a2b03444448ebca2728cf7802bc","first_computed_at":"2026-07-04T15:22:16.106947Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:22:16.106947Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"80EKorpHMtm9P2M0xZdqj0VjnI9EYlBRAv21cg6mDrz3hWO09gquDJgmHEYTmoYHcne0CyzBbp7750GY9jzUAA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:22:16.107387Z","signed_message":"canonical_sha256_bytes"},"source_id":"physics/0703199","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:08a035e8f64fc56950d4bbe4416ffc609d3d40c44b6e74c7ecc5af116b04b978","sha256:9104f8e34a5a33670cf3f6ce382547e368c68cc2481e7523c9e4dfe1a2541090"],"state_sha256":"4ca79e1c16c523b6ef391acdf8dec62b206232a990a9fd2d1e080689f4f782d4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rbS8uRtfKoTBTJyQJTX5qcIfCzTdnt+j1p3jdvR3xNAebYRScRAiEpR7MwWnG6L4t8SIpe5j3xyPWGT+Mn10DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T11:55:00.642462Z","bundle_sha256":"fa57e8eb8b88369f7065bdb1bce277fac90b75c5aff517f8ba4e6e536d1daac0"}}