{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:WBNDFBIXGXLZW2ZZU5UNJIFZ2R","short_pith_number":"pith:WBNDFBIX","canonical_record":{"source":{"id":"1311.6620","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-11-26T11:23:13Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"4fe8ea812a515f6e1967504cc8c2ec6837e5f2207085fb8b8ad89d01296691d1","abstract_canon_sha256":"e56cad09b4a46b4d312fa0fadbc19313a296409a384244638ebae51d55e2dd6f"},"schema_version":"1.0"},"canonical_sha256":"b05a32851735d79b6b39a768d4a0b9d4468597e893dd3dbc875a2190da3de6fe","source":{"kind":"arxiv","id":"1311.6620","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.6620","created_at":"2026-05-18T01:46:06Z"},{"alias_kind":"arxiv_version","alias_value":"1311.6620v3","created_at":"2026-05-18T01:46:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.6620","created_at":"2026-05-18T01:46:06Z"},{"alias_kind":"pith_short_12","alias_value":"WBNDFBIXGXLZ","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_16","alias_value":"WBNDFBIXGXLZW2ZZ","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_8","alias_value":"WBNDFBIX","created_at":"2026-05-18T12:28:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:WBNDFBIXGXLZW2ZZU5UNJIFZ2R","target":"record","payload":{"canonical_record":{"source":{"id":"1311.6620","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-11-26T11:23:13Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"4fe8ea812a515f6e1967504cc8c2ec6837e5f2207085fb8b8ad89d01296691d1","abstract_canon_sha256":"e56cad09b4a46b4d312fa0fadbc19313a296409a384244638ebae51d55e2dd6f"},"schema_version":"1.0"},"canonical_sha256":"b05a32851735d79b6b39a768d4a0b9d4468597e893dd3dbc875a2190da3de6fe","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:46:06.087353Z","signature_b64":"j9UQ4h5d9cfx1uWc7bh3Vv38QUHjqRDyuTvk8pdkrjSJqamR8irOONyXTK+pnd9oZCANmquT870hKIaQ2ttuBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b05a32851735d79b6b39a768d4a0b9d4468597e893dd3dbc875a2190da3de6fe","last_reissued_at":"2026-05-18T01:46:06.086745Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:46:06.086745Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1311.6620","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:46:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qxPBelb34ApoSBTzRN6Vh2bL9ncJO13gbGpoq1GcRjuh17XXpf+E8NBUu3l1T3zetSMB84D+GKDVsOeil/RmAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T12:15:42.589944Z"},"content_sha256":"2a9a0d84eed5b926d2a3c23831b8aac38c27df15344206beb3540eca5c25469c","schema_version":"1.0","event_id":"sha256:2a9a0d84eed5b926d2a3c23831b8aac38c27df15344206beb3540eca5c25469c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:WBNDFBIXGXLZW2ZZU5UNJIFZ2R","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Monte Carlo modeling of spallation targets containing uranium and americium","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"physics.ins-det","authors_text":"Igor Mishustin, Igor Pshenichnov, Walter Greiner, Yury Malyshkin","submitted_at":"2013-11-26T11:23:13Z","abstract_excerpt":"Neutron production and transport in spallation targets made of uranium and americium are studied with a Geant4-based code MCADS (Monte Carlo model for Accelerator Driven Systems). A good agreement of MCADS results with experimental data on neutron- and proton-induced reactions on $^{241}$Am and $^{243}$Am nuclei allows to use this model for simulations with extended Am targets. It was demonstrated that MCADS model can be used for calculating the values of critical mass for $^{233,235}$U, $^{237}$Np, $^{239}$Pu and $^{241}$Am. Several geometry options and material compositions (U, U+Am, Am, Am$"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.6620","kind":"arxiv","version":3},"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":"2026-05-18T01:46:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DTZ4Z9rS9tEiVgzZJVierY68fYNfnT6fibEL9dAXYR4+V/xk2KYrdxne9uqwhHU24QSFd/C+YTV2nJEx2Hz6CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T12:15:42.590745Z"},"content_sha256":"921e9f6cb709f5f861d24335940b43b6b0ddd8df223cc407ea46d68ceaaa495c","schema_version":"1.0","event_id":"sha256:921e9f6cb709f5f861d24335940b43b6b0ddd8df223cc407ea46d68ceaaa495c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WBNDFBIXGXLZW2ZZU5UNJIFZ2R/bundle.json","state_url":"https://pith.science/pith/WBNDFBIXGXLZW2ZZU5UNJIFZ2R/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WBNDFBIXGXLZW2ZZU5UNJIFZ2R/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":"2026-05-27T12:15:42Z","links":{"resolver":"https://pith.science/pith/WBNDFBIXGXLZW2ZZU5UNJIFZ2R","bundle":"https://pith.science/pith/WBNDFBIXGXLZW2ZZU5UNJIFZ2R/bundle.json","state":"https://pith.science/pith/WBNDFBIXGXLZW2ZZU5UNJIFZ2R/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WBNDFBIXGXLZW2ZZU5UNJIFZ2R/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:WBNDFBIXGXLZW2ZZU5UNJIFZ2R","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":"e56cad09b4a46b4d312fa0fadbc19313a296409a384244638ebae51d55e2dd6f","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-11-26T11:23:13Z","title_canon_sha256":"4fe8ea812a515f6e1967504cc8c2ec6837e5f2207085fb8b8ad89d01296691d1"},"schema_version":"1.0","source":{"id":"1311.6620","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.6620","created_at":"2026-05-18T01:46:06Z"},{"alias_kind":"arxiv_version","alias_value":"1311.6620v3","created_at":"2026-05-18T01:46:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.6620","created_at":"2026-05-18T01:46:06Z"},{"alias_kind":"pith_short_12","alias_value":"WBNDFBIXGXLZ","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_16","alias_value":"WBNDFBIXGXLZW2ZZ","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_8","alias_value":"WBNDFBIX","created_at":"2026-05-18T12:28:04Z"}],"graph_snapshots":[{"event_id":"sha256:921e9f6cb709f5f861d24335940b43b6b0ddd8df223cc407ea46d68ceaaa495c","target":"graph","created_at":"2026-05-18T01:46:06Z","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":"Neutron production and transport in spallation targets made of uranium and americium are studied with a Geant4-based code MCADS (Monte Carlo model for Accelerator Driven Systems). A good agreement of MCADS results with experimental data on neutron- and proton-induced reactions on $^{241}$Am and $^{243}$Am nuclei allows to use this model for simulations with extended Am targets. It was demonstrated that MCADS model can be used for calculating the values of critical mass for $^{233,235}$U, $^{237}$Np, $^{239}$Pu and $^{241}$Am. Several geometry options and material compositions (U, U+Am, Am, Am$","authors_text":"Igor Mishustin, Igor Pshenichnov, Walter Greiner, Yury Malyshkin","cross_cats":["nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-11-26T11:23:13Z","title":"Monte Carlo modeling of spallation targets containing uranium and americium"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.6620","kind":"arxiv","version":3},"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":"sha256:2a9a0d84eed5b926d2a3c23831b8aac38c27df15344206beb3540eca5c25469c","target":"record","created_at":"2026-05-18T01:46:06Z","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":"e56cad09b4a46b4d312fa0fadbc19313a296409a384244638ebae51d55e2dd6f","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2013-11-26T11:23:13Z","title_canon_sha256":"4fe8ea812a515f6e1967504cc8c2ec6837e5f2207085fb8b8ad89d01296691d1"},"schema_version":"1.0","source":{"id":"1311.6620","kind":"arxiv","version":3}},"canonical_sha256":"b05a32851735d79b6b39a768d4a0b9d4468597e893dd3dbc875a2190da3de6fe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b05a32851735d79b6b39a768d4a0b9d4468597e893dd3dbc875a2190da3de6fe","first_computed_at":"2026-05-18T01:46:06.086745Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:46:06.086745Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"j9UQ4h5d9cfx1uWc7bh3Vv38QUHjqRDyuTvk8pdkrjSJqamR8irOONyXTK+pnd9oZCANmquT870hKIaQ2ttuBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:46:06.087353Z","signed_message":"canonical_sha256_bytes"},"source_id":"1311.6620","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2a9a0d84eed5b926d2a3c23831b8aac38c27df15344206beb3540eca5c25469c","sha256:921e9f6cb709f5f861d24335940b43b6b0ddd8df223cc407ea46d68ceaaa495c"],"state_sha256":"ce63d606452b9fc4688f0710f068ac2195381fe0a3b459eea4bebe321144f388"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q8f57dvjA9o7W/lJhYZcxZv98gXC5/JL/iZFyVcPfunH7v8fwrn6PRBS2/WHhnYN6bWXjBPA0hjsTUiVW8m0BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T12:15:42.593740Z","bundle_sha256":"24a109a6ae56be8c604affef63167877dceab4376d13c0546a82bea97dac26ea"}}