{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:4UVLHMGOZTTVONAAZXOXYOM72Z","short_pith_number":"pith:4UVLHMGO","canonical_record":{"source":{"id":"1911.04780","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-11-12T10:38:18Z","cross_cats_sorted":[],"title_canon_sha256":"af778a3df3051e1786ab44245280e7fb180910267fb5b5677559a7867a41f66d","abstract_canon_sha256":"945b174912db67a1d4424e61b9f7cc79a91b26bc8681f3efc6c04e37796805b9"},"schema_version":"1.0"},"canonical_sha256":"e52ab3b0cecce7573400cddd7c399fd67c707496da557766f5b128fb38049420","source":{"kind":"arxiv","id":"1911.04780","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.04780","created_at":"2026-07-05T01:49:14Z"},{"alias_kind":"arxiv_version","alias_value":"1911.04780v2","created_at":"2026-07-05T01:49:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.04780","created_at":"2026-07-05T01:49:14Z"},{"alias_kind":"pith_short_12","alias_value":"4UVLHMGOZTTV","created_at":"2026-07-05T01:49:14Z"},{"alias_kind":"pith_short_16","alias_value":"4UVLHMGOZTTVONAA","created_at":"2026-07-05T01:49:14Z"},{"alias_kind":"pith_short_8","alias_value":"4UVLHMGO","created_at":"2026-07-05T01:49:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:4UVLHMGOZTTVONAAZXOXYOM72Z","target":"record","payload":{"canonical_record":{"source":{"id":"1911.04780","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-11-12T10:38:18Z","cross_cats_sorted":[],"title_canon_sha256":"af778a3df3051e1786ab44245280e7fb180910267fb5b5677559a7867a41f66d","abstract_canon_sha256":"945b174912db67a1d4424e61b9f7cc79a91b26bc8681f3efc6c04e37796805b9"},"schema_version":"1.0"},"canonical_sha256":"e52ab3b0cecce7573400cddd7c399fd67c707496da557766f5b128fb38049420","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:49:14.406726Z","signature_b64":"6z2KCwf0qdiw3XXn0Tal7tGuBShv45wXrseaM0QMZshIZCxBVqQ9mRglzf7Gjf+v15cHu6RInIbH2zaV9MZlBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e52ab3b0cecce7573400cddd7c399fd67c707496da557766f5b128fb38049420","last_reissued_at":"2026-07-05T01:49:14.406222Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:49:14.406222Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1911.04780","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":"2026-07-05T01:49:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kwVTd5e86c0lKcC8KGNChB/O7TqqiMJEb8FuuKUY+pHSlnbGfNbHPoERmOisBIMn/tZe7X1dJDx/Fht8lnsSAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T20:58:18.823987Z"},"content_sha256":"6cd4744301d4fb73b81bc6f2b195348a6320ca64848a7f68a44f8e1a0a677eb6","schema_version":"1.0","event_id":"sha256:6cd4744301d4fb73b81bc6f2b195348a6320ca64848a7f68a44f8e1a0a677eb6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:4UVLHMGOZTTVONAAZXOXYOM72Z","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Kinematically complete experimental study of Compton scattering at helium atoms near the ionization threshold","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"Florian Trinter, Igor P. Volobuev, Isabel Vela-Perez, Jonas Rist, Kai Bagschik, Manfred Lein, Maria Novella Piancastelli, Markus S. Sch\\\"offler, Max Kircher, Nicolas Eicke, Ochbadrakh Chuluunbaatar, Reinhard D\\\"orner, Salim Houamer, Sebastian Eckart, Simon Brennecke, Sven Grundmann, Till Jahnke, Yuri V. Popov","submitted_at":"2019-11-12T10:38:18Z","abstract_excerpt":"Compton scattering is one of the fundamental interaction processes of light with matter. Already upon its discovery [1] it was described as a billiard-type collision of a photon kicking a quasi-free electron. With decreasing photon energy, the maximum possible momentum transfer becomes so small that the corresponding energy falls below the binding energy of the electron. Then ionization by Compton scattering becomes an intriguing quantum phenomenon. Here we report a kinematically complete experiment on Compton scattering at helium atoms below that threshold. We determine the momentum correlati"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.04780","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1911.04780/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":"2026-07-05T01:49:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vZYayiMq3ySHSdWT3X4BiLq+pm9WiJx8bgkv36Wr1WR/SwlWWezUsdml6PHQYN2NFd6Mux+1KVaCTM9erEryDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T20:58:18.824498Z"},"content_sha256":"811b242bb0e710717d481324721b27210e7e7d281f0e128561585637a378ddfa","schema_version":"1.0","event_id":"sha256:811b242bb0e710717d481324721b27210e7e7d281f0e128561585637a378ddfa"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4UVLHMGOZTTVONAAZXOXYOM72Z/bundle.json","state_url":"https://pith.science/pith/4UVLHMGOZTTVONAAZXOXYOM72Z/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4UVLHMGOZTTVONAAZXOXYOM72Z/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":"2026-08-20T20:58:18Z","links":{"resolver":"https://pith.science/pith/4UVLHMGOZTTVONAAZXOXYOM72Z","bundle":"https://pith.science/pith/4UVLHMGOZTTVONAAZXOXYOM72Z/bundle.json","state":"https://pith.science/pith/4UVLHMGOZTTVONAAZXOXYOM72Z/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4UVLHMGOZTTVONAAZXOXYOM72Z/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:4UVLHMGOZTTVONAAZXOXYOM72Z","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":"945b174912db67a1d4424e61b9f7cc79a91b26bc8681f3efc6c04e37796805b9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-11-12T10:38:18Z","title_canon_sha256":"af778a3df3051e1786ab44245280e7fb180910267fb5b5677559a7867a41f66d"},"schema_version":"1.0","source":{"id":"1911.04780","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.04780","created_at":"2026-07-05T01:49:14Z"},{"alias_kind":"arxiv_version","alias_value":"1911.04780v2","created_at":"2026-07-05T01:49:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.04780","created_at":"2026-07-05T01:49:14Z"},{"alias_kind":"pith_short_12","alias_value":"4UVLHMGOZTTV","created_at":"2026-07-05T01:49:14Z"},{"alias_kind":"pith_short_16","alias_value":"4UVLHMGOZTTVONAA","created_at":"2026-07-05T01:49:14Z"},{"alias_kind":"pith_short_8","alias_value":"4UVLHMGO","created_at":"2026-07-05T01:49:14Z"}],"graph_snapshots":[{"event_id":"sha256:811b242bb0e710717d481324721b27210e7e7d281f0e128561585637a378ddfa","target":"graph","created_at":"2026-07-05T01:49:14Z","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/1911.04780/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Compton scattering is one of the fundamental interaction processes of light with matter. Already upon its discovery [1] it was described as a billiard-type collision of a photon kicking a quasi-free electron. With decreasing photon energy, the maximum possible momentum transfer becomes so small that the corresponding energy falls below the binding energy of the electron. Then ionization by Compton scattering becomes an intriguing quantum phenomenon. Here we report a kinematically complete experiment on Compton scattering at helium atoms below that threshold. We determine the momentum correlati","authors_text":"Florian Trinter, Igor P. Volobuev, Isabel Vela-Perez, Jonas Rist, Kai Bagschik, Manfred Lein, Maria Novella Piancastelli, Markus S. Sch\\\"offler, Max Kircher, Nicolas Eicke, Ochbadrakh Chuluunbaatar, Reinhard D\\\"orner, Salim Houamer, Sebastian Eckart, Simon Brennecke, Sven Grundmann, Till Jahnke, Yuri V. Popov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-11-12T10:38:18Z","title":"Kinematically complete experimental study of Compton scattering at helium atoms near the ionization threshold"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.04780","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":"sha256:6cd4744301d4fb73b81bc6f2b195348a6320ca64848a7f68a44f8e1a0a677eb6","target":"record","created_at":"2026-07-05T01:49:14Z","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":"945b174912db67a1d4424e61b9f7cc79a91b26bc8681f3efc6c04e37796805b9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-11-12T10:38:18Z","title_canon_sha256":"af778a3df3051e1786ab44245280e7fb180910267fb5b5677559a7867a41f66d"},"schema_version":"1.0","source":{"id":"1911.04780","kind":"arxiv","version":2}},"canonical_sha256":"e52ab3b0cecce7573400cddd7c399fd67c707496da557766f5b128fb38049420","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e52ab3b0cecce7573400cddd7c399fd67c707496da557766f5b128fb38049420","first_computed_at":"2026-07-05T01:49:14.406222Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:49:14.406222Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6z2KCwf0qdiw3XXn0Tal7tGuBShv45wXrseaM0QMZshIZCxBVqQ9mRglzf7Gjf+v15cHu6RInIbH2zaV9MZlBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:49:14.406726Z","signed_message":"canonical_sha256_bytes"},"source_id":"1911.04780","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6cd4744301d4fb73b81bc6f2b195348a6320ca64848a7f68a44f8e1a0a677eb6","sha256:811b242bb0e710717d481324721b27210e7e7d281f0e128561585637a378ddfa"],"state_sha256":"fdcb1edf335d3e66a4df53919d3ecc98321267134337665b5a1b526df9511f2c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"spIqp+Pk/wSYyKpPMgPgJsH9FFxZj4P8GufVUWI5ZUMgAnXFByIfK6E/N+OmyJXJwe9VFBN7kp0N2imdpUxzBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T20:58:18.829272Z","bundle_sha256":"988670162f711d09e9748d65ff4b1926834d3a5fe89de11caa8bb556188b2056"}}