{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:KQNMBETKGKB5T6QTZHY3KNZPQL","short_pith_number":"pith:KQNMBETK","canonical_record":{"source":{"id":"1707.00550","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2017-07-03T13:51:58Z","cross_cats_sorted":[],"title_canon_sha256":"9d16e7cb92501a85447e269c03829dc9dfcf9ce33fe2f7686df02d4f1a91ef49","abstract_canon_sha256":"f01dbfe9751c0126ad82b04d340293837b18aacff853f2aaef05d82761e3dbf1"},"schema_version":"1.0"},"canonical_sha256":"541ac0926a3283d9fa13c9f1b5372f82d6fe2ba7506252e32174eb09c0b229a6","source":{"kind":"arxiv","id":"1707.00550","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.00550","created_at":"2026-05-18T00:40:23Z"},{"alias_kind":"arxiv_version","alias_value":"1707.00550v1","created_at":"2026-05-18T00:40:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.00550","created_at":"2026-05-18T00:40:23Z"},{"alias_kind":"pith_short_12","alias_value":"KQNMBETKGKB5","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_16","alias_value":"KQNMBETKGKB5T6QT","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_8","alias_value":"KQNMBETK","created_at":"2026-05-18T12:31:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:KQNMBETKGKB5T6QTZHY3KNZPQL","target":"record","payload":{"canonical_record":{"source":{"id":"1707.00550","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2017-07-03T13:51:58Z","cross_cats_sorted":[],"title_canon_sha256":"9d16e7cb92501a85447e269c03829dc9dfcf9ce33fe2f7686df02d4f1a91ef49","abstract_canon_sha256":"f01dbfe9751c0126ad82b04d340293837b18aacff853f2aaef05d82761e3dbf1"},"schema_version":"1.0"},"canonical_sha256":"541ac0926a3283d9fa13c9f1b5372f82d6fe2ba7506252e32174eb09c0b229a6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:40:23.601743Z","signature_b64":"d6oZ8m6+OzUoo0p0kD1U6aCJnnJn4glmg5Yn1/QqTUfzIVJxJ7IvFrcBw8Zx37fxX+xyMEVQuvUzL6jtcOVLBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"541ac0926a3283d9fa13c9f1b5372f82d6fe2ba7506252e32174eb09c0b229a6","last_reissued_at":"2026-05-18T00:40:23.601041Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:40:23.601041Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1707.00550","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":"2026-05-18T00:40:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q9218+pVC4KX3sx9YaR4vLeMRCZ5YZNqblnyS9Idd16bsTf9lgTzKKGhXP1ETuYojwWvPwEcjo++44JtgW9ACA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T17:26:23.052104Z"},"content_sha256":"13d9ae83a9236fb7aeb04439563755938890ead86e6b6e73a84df4d1788e8a7d","schema_version":"1.0","event_id":"sha256:13d9ae83a9236fb7aeb04439563755938890ead86e6b6e73a84df4d1788e8a7d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:KQNMBETKGKB5T6QTZHY3KNZPQL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Photoelectron distribution of non-resonant two-photon ionization of neutral atoms","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"A. V. Volotka, J. Hofbrucker, S. Fritzsche","submitted_at":"2017-07-03T13:51:58Z","abstract_excerpt":"Photoelectron angular distributions following the non-resonant two-photon K-shell ionization of neutral atoms are studied theoretically. Using the independent particle approximation and relativistic second-order perturbation theory, the contributions of screening and relativistic effects to the photoelectron angular distribution are evaluated. A simple nonrelativistic expression is presented for the angle-differential cross section in dipole approximation for two-photon ionization by elliptically polarized photons, and its limitations are analyzed numerically. Moreover, we show that screening "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.00550","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":"2026-05-18T00:40:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vbWDB+07TA5okriD2elaL4GH9ixmO87Jvgj5P0M95Nzza8QqQ2arhMyAjxT8ocfnq/3YA1nfPACkYWn/oULtBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T17:26:23.052703Z"},"content_sha256":"5f7400d9d6ab19bd0264e57e2fe1cacbfbbfcf70ac78bca1504bf8cfff9c1589","schema_version":"1.0","event_id":"sha256:5f7400d9d6ab19bd0264e57e2fe1cacbfbbfcf70ac78bca1504bf8cfff9c1589"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KQNMBETKGKB5T6QTZHY3KNZPQL/bundle.json","state_url":"https://pith.science/pith/KQNMBETKGKB5T6QTZHY3KNZPQL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KQNMBETKGKB5T6QTZHY3KNZPQL/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":"2026-05-29T17:26:23Z","links":{"resolver":"https://pith.science/pith/KQNMBETKGKB5T6QTZHY3KNZPQL","bundle":"https://pith.science/pith/KQNMBETKGKB5T6QTZHY3KNZPQL/bundle.json","state":"https://pith.science/pith/KQNMBETKGKB5T6QTZHY3KNZPQL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KQNMBETKGKB5T6QTZHY3KNZPQL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:KQNMBETKGKB5T6QTZHY3KNZPQL","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":"f01dbfe9751c0126ad82b04d340293837b18aacff853f2aaef05d82761e3dbf1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2017-07-03T13:51:58Z","title_canon_sha256":"9d16e7cb92501a85447e269c03829dc9dfcf9ce33fe2f7686df02d4f1a91ef49"},"schema_version":"1.0","source":{"id":"1707.00550","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.00550","created_at":"2026-05-18T00:40:23Z"},{"alias_kind":"arxiv_version","alias_value":"1707.00550v1","created_at":"2026-05-18T00:40:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.00550","created_at":"2026-05-18T00:40:23Z"},{"alias_kind":"pith_short_12","alias_value":"KQNMBETKGKB5","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_16","alias_value":"KQNMBETKGKB5T6QT","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_8","alias_value":"KQNMBETK","created_at":"2026-05-18T12:31:24Z"}],"graph_snapshots":[{"event_id":"sha256:5f7400d9d6ab19bd0264e57e2fe1cacbfbbfcf70ac78bca1504bf8cfff9c1589","target":"graph","created_at":"2026-05-18T00:40:23Z","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":"Photoelectron angular distributions following the non-resonant two-photon K-shell ionization of neutral atoms are studied theoretically. Using the independent particle approximation and relativistic second-order perturbation theory, the contributions of screening and relativistic effects to the photoelectron angular distribution are evaluated. A simple nonrelativistic expression is presented for the angle-differential cross section in dipole approximation for two-photon ionization by elliptically polarized photons, and its limitations are analyzed numerically. Moreover, we show that screening ","authors_text":"A. V. Volotka, J. Hofbrucker, S. Fritzsche","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2017-07-03T13:51:58Z","title":"Photoelectron distribution of non-resonant two-photon ionization of neutral atoms"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.00550","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":"sha256:13d9ae83a9236fb7aeb04439563755938890ead86e6b6e73a84df4d1788e8a7d","target":"record","created_at":"2026-05-18T00:40:23Z","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":"f01dbfe9751c0126ad82b04d340293837b18aacff853f2aaef05d82761e3dbf1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2017-07-03T13:51:58Z","title_canon_sha256":"9d16e7cb92501a85447e269c03829dc9dfcf9ce33fe2f7686df02d4f1a91ef49"},"schema_version":"1.0","source":{"id":"1707.00550","kind":"arxiv","version":1}},"canonical_sha256":"541ac0926a3283d9fa13c9f1b5372f82d6fe2ba7506252e32174eb09c0b229a6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"541ac0926a3283d9fa13c9f1b5372f82d6fe2ba7506252e32174eb09c0b229a6","first_computed_at":"2026-05-18T00:40:23.601041Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:40:23.601041Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"d6oZ8m6+OzUoo0p0kD1U6aCJnnJn4glmg5Yn1/QqTUfzIVJxJ7IvFrcBw8Zx37fxX+xyMEVQuvUzL6jtcOVLBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:40:23.601743Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.00550","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:13d9ae83a9236fb7aeb04439563755938890ead86e6b6e73a84df4d1788e8a7d","sha256:5f7400d9d6ab19bd0264e57e2fe1cacbfbbfcf70ac78bca1504bf8cfff9c1589"],"state_sha256":"a238811e1621dcffc368f89b78b9969f87ae5c551ed55db2d49da643dc4619bc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3ut2ZbSUra1i1deUSxqISrcbZkoQjWV0Onajm2ZZdw+KK3LI06Qtued472LnYtrKPRGPoSO/7KUxejBDXYokCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T17:26:23.056635Z","bundle_sha256":"6429d396ab8a948eb3e0c6ac587e1b67313bde139660a23ad28fe8c77bccb106"}}