{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:OAWXR4DWSNGL65QRFPVURRACNZ","short_pith_number":"pith:OAWXR4DW","canonical_record":{"source":{"id":"1508.00557","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2015-08-03T19:55:30Z","cross_cats_sorted":[],"title_canon_sha256":"ade6a19e5bb862adb175d3e8d493965e576173836214c5ecc9fad875b28727f9","abstract_canon_sha256":"8e57a9d4505af9e93632d40ca4332334c5d27709a9444c1d7a39b27426acf8df"},"schema_version":"1.0"},"canonical_sha256":"702d78f076934cbf76112beb48c4026e48807bcf38f467f5b9a52428c134f8c5","source":{"kind":"arxiv","id":"1508.00557","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.00557","created_at":"2026-05-18T01:22:37Z"},{"alias_kind":"arxiv_version","alias_value":"1508.00557v2","created_at":"2026-05-18T01:22:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.00557","created_at":"2026-05-18T01:22:37Z"},{"alias_kind":"pith_short_12","alias_value":"OAWXR4DWSNGL","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_16","alias_value":"OAWXR4DWSNGL65QR","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_8","alias_value":"OAWXR4DW","created_at":"2026-05-18T12:29:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:OAWXR4DWSNGL65QRFPVURRACNZ","target":"record","payload":{"canonical_record":{"source":{"id":"1508.00557","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2015-08-03T19:55:30Z","cross_cats_sorted":[],"title_canon_sha256":"ade6a19e5bb862adb175d3e8d493965e576173836214c5ecc9fad875b28727f9","abstract_canon_sha256":"8e57a9d4505af9e93632d40ca4332334c5d27709a9444c1d7a39b27426acf8df"},"schema_version":"1.0"},"canonical_sha256":"702d78f076934cbf76112beb48c4026e48807bcf38f467f5b9a52428c134f8c5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:22:37.359759Z","signature_b64":"P8mwo9Z+t0ZTy/+Pu2YqiXxpxvOaxRkGytGLkbtBBivvCr25c5idJX2fgjrEpRYsmEaS9uM1VMCfF9SNrZaZAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"702d78f076934cbf76112beb48c4026e48807bcf38f467f5b9a52428c134f8c5","last_reissued_at":"2026-05-18T01:22:37.359001Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:22:37.359001Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1508.00557","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":"2026-05-18T01:22:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"evRyOB6CbzatTGlCEN3tJf/R1wnz0+oBRy0yMvyRMeuaZWEBbZnWp1qnrG1Tr+qhsjveZ8/uCRi4zU58mIO8Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T04:10:14.515842Z"},"content_sha256":"a0c74371b0c3ee50123df9ef184ba6b822068b45b2788185588ed96ad7013075","schema_version":"1.0","event_id":"sha256:a0c74371b0c3ee50123df9ef184ba6b822068b45b2788185588ed96ad7013075"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:OAWXR4DWSNGL65QRFPVURRACNZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Woods-Saxon equivalent to a double folding potential","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-th","authors_text":"A. S. Freitas, L. Marques, M. A. Luzio, P. Guillaumon, R. Lichtenth\\\"aler, R. Pampa Condori, X. X. Zhang","submitted_at":"2015-08-03T19:55:30Z","abstract_excerpt":"A Woods-Saxon equivalent to a double folding potential in the surface region is obtained for the heavy-ion scattering potential. The Woods-Saxon potential has fixed geometry and was applied as a bare potential in the analysis of experimental data of several systems. A new analytical formula for the position and height of the Coulomb barrier is presented, which reproduces the results obtained using double folding potentials. This simple formula has been applied to estimate the fusion cross section above the Coulomb barrier. A comparison with experimental data is presented."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.00557","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":"2026-05-18T01:22:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JJbjErggAtntmxfzzfiC+sz2Y5TjcFPwpp8avcdz35RQAOHci+LFuqowWlkIFhelRVgfOSuGwVqIyTsr709CBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T04:10:14.516191Z"},"content_sha256":"4741027a373de55edae50926484d910360a60ded1790db21d77a3e161e5547f2","schema_version":"1.0","event_id":"sha256:4741027a373de55edae50926484d910360a60ded1790db21d77a3e161e5547f2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OAWXR4DWSNGL65QRFPVURRACNZ/bundle.json","state_url":"https://pith.science/pith/OAWXR4DWSNGL65QRFPVURRACNZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OAWXR4DWSNGL65QRFPVURRACNZ/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":"2026-06-01T04:10:14Z","links":{"resolver":"https://pith.science/pith/OAWXR4DWSNGL65QRFPVURRACNZ","bundle":"https://pith.science/pith/OAWXR4DWSNGL65QRFPVURRACNZ/bundle.json","state":"https://pith.science/pith/OAWXR4DWSNGL65QRFPVURRACNZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OAWXR4DWSNGL65QRFPVURRACNZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:OAWXR4DWSNGL65QRFPVURRACNZ","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":"8e57a9d4505af9e93632d40ca4332334c5d27709a9444c1d7a39b27426acf8df","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2015-08-03T19:55:30Z","title_canon_sha256":"ade6a19e5bb862adb175d3e8d493965e576173836214c5ecc9fad875b28727f9"},"schema_version":"1.0","source":{"id":"1508.00557","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.00557","created_at":"2026-05-18T01:22:37Z"},{"alias_kind":"arxiv_version","alias_value":"1508.00557v2","created_at":"2026-05-18T01:22:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.00557","created_at":"2026-05-18T01:22:37Z"},{"alias_kind":"pith_short_12","alias_value":"OAWXR4DWSNGL","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_16","alias_value":"OAWXR4DWSNGL65QR","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_8","alias_value":"OAWXR4DW","created_at":"2026-05-18T12:29:34Z"}],"graph_snapshots":[{"event_id":"sha256:4741027a373de55edae50926484d910360a60ded1790db21d77a3e161e5547f2","target":"graph","created_at":"2026-05-18T01:22:37Z","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":"A Woods-Saxon equivalent to a double folding potential in the surface region is obtained for the heavy-ion scattering potential. The Woods-Saxon potential has fixed geometry and was applied as a bare potential in the analysis of experimental data of several systems. A new analytical formula for the position and height of the Coulomb barrier is presented, which reproduces the results obtained using double folding potentials. This simple formula has been applied to estimate the fusion cross section above the Coulomb barrier. A comparison with experimental data is presented.","authors_text":"A. S. Freitas, L. Marques, M. A. Luzio, P. Guillaumon, R. Lichtenth\\\"aler, R. Pampa Condori, X. X. Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2015-08-03T19:55:30Z","title":"Woods-Saxon equivalent to a double folding potential"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.00557","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:a0c74371b0c3ee50123df9ef184ba6b822068b45b2788185588ed96ad7013075","target":"record","created_at":"2026-05-18T01:22:37Z","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":"8e57a9d4505af9e93632d40ca4332334c5d27709a9444c1d7a39b27426acf8df","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2015-08-03T19:55:30Z","title_canon_sha256":"ade6a19e5bb862adb175d3e8d493965e576173836214c5ecc9fad875b28727f9"},"schema_version":"1.0","source":{"id":"1508.00557","kind":"arxiv","version":2}},"canonical_sha256":"702d78f076934cbf76112beb48c4026e48807bcf38f467f5b9a52428c134f8c5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"702d78f076934cbf76112beb48c4026e48807bcf38f467f5b9a52428c134f8c5","first_computed_at":"2026-05-18T01:22:37.359001Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:22:37.359001Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"P8mwo9Z+t0ZTy/+Pu2YqiXxpxvOaxRkGytGLkbtBBivvCr25c5idJX2fgjrEpRYsmEaS9uM1VMCfF9SNrZaZAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:22:37.359759Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.00557","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a0c74371b0c3ee50123df9ef184ba6b822068b45b2788185588ed96ad7013075","sha256:4741027a373de55edae50926484d910360a60ded1790db21d77a3e161e5547f2"],"state_sha256":"653b71b931d0c6c97a5fda963b6802298f5882741ffc2772bb2f7c5edf46f28c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ydqLgAhmzNGQCkw1zpvpSrXXXjzTSSMjXP7v7WmthvjAZS+NS0aliRy8R+peZYnOBO7wwNdFsFaI0E7D4hXuDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T04:10:14.518239Z","bundle_sha256":"02e23a550696e13ed1fd72b9a47065a3403eb79b868192501d86858c04809706"}}