{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:ZW3EGWPUI2XN4WT7K6U3MRRFLD","short_pith_number":"pith:ZW3EGWPU","canonical_record":{"source":{"id":"1706.09609","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2017-06-29T07:43:19Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"549b6a15fc5629a9f34e86c3ed77aa05b00fe017efe2416c095bbaed9bb3d766","abstract_canon_sha256":"4316be7d654a0dad87bef77ffa00a4fba3daa5d9fc42b223ec5135480bbba5d5"},"schema_version":"1.0"},"canonical_sha256":"cdb64359f446aede5a7f57a9b6462558faba82774e5ddf7d12ce8eeb9596b288","source":{"kind":"arxiv","id":"1706.09609","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1706.09609","created_at":"2026-05-18T00:38:17Z"},{"alias_kind":"arxiv_version","alias_value":"1706.09609v2","created_at":"2026-05-18T00:38:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1706.09609","created_at":"2026-05-18T00:38:17Z"},{"alias_kind":"pith_short_12","alias_value":"ZW3EGWPUI2XN","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"ZW3EGWPUI2XN4WT7","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"ZW3EGWPU","created_at":"2026-05-18T12:31:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:ZW3EGWPUI2XN4WT7K6U3MRRFLD","target":"record","payload":{"canonical_record":{"source":{"id":"1706.09609","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2017-06-29T07:43:19Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"549b6a15fc5629a9f34e86c3ed77aa05b00fe017efe2416c095bbaed9bb3d766","abstract_canon_sha256":"4316be7d654a0dad87bef77ffa00a4fba3daa5d9fc42b223ec5135480bbba5d5"},"schema_version":"1.0"},"canonical_sha256":"cdb64359f446aede5a7f57a9b6462558faba82774e5ddf7d12ce8eeb9596b288","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:38:17.798863Z","signature_b64":"4R5H89909/tSP5U1YfqGAfCPWCfxEScEnyD+ID8KcmhZZEFJNZjYQXm7IU+Njst6LXCNTxLqeVWOlzHMuATiBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cdb64359f446aede5a7f57a9b6462558faba82774e5ddf7d12ce8eeb9596b288","last_reissued_at":"2026-05-18T00:38:17.798170Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:38:17.798170Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1706.09609","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":"2026-05-18T00:38:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NJlZvpc2eCe1aFEN3wX6n88VM08egvpl1naLAmLY3/GKmDO+B17RzjI58LXBAJU4RzeQqQ3uucq79LM2ghT9DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T05:56:39.855422Z"},"content_sha256":"8e7d7ac04d60bbe1142a9ff7f234001618571272cbc9641346e3e3b26e0a1946","schema_version":"1.0","event_id":"sha256:8e7d7ac04d60bbe1142a9ff7f234001618571272cbc9641346e3e3b26e0a1946"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:ZW3EGWPUI2XN4WT7K6U3MRRFLD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Experimental Determination of One- and Two-Neutron Separation Energies for Neutron-Rich Copper Isotopes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-th"],"primary_cat":"nucl-ex","authors_text":"Chun-Wang Ma, Hui-Ling Wei, Mian YU, Yi-Dan Song","submitted_at":"2017-06-29T07:43:19Z","abstract_excerpt":"A method is proposed to determine the one-neutron $S_n$ or two-neutron $S_{2n}$ separation energy of neutron-rich isotopes. Relationships between $S_n$ ($S_{2n}$) and isotopic cross sections have been deduced from an empirical formula, i.e., the cross section of an isotope exponentially depends on the average binding energy per nucleon $B/A$. The proposed relationships have been verified using the neutron-rich copper isotopes measured in the 64$A$ MeV $^{86}$Kr + $^{9}$Be reaction. $S_n$, $S_{2n}$, and $B/A$ for the very neutron-rich $^{77, 78, 79}$Cu isotopes are determined from the proposed "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.09609","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":"2026-05-18T00:38:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OTJ6CoDikrxnyq1AtYnZuyL3JeJURZ13T8s9x3LP1hPzf18heMRv67/qv7r9zbmt1c/ACxky6FHCO9Y5Akc6DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T05:56:39.855780Z"},"content_sha256":"34a57b3945a51cb9cc8442cc58951e0cca68f373297c0b9afd6a6a60c0f8e57e","schema_version":"1.0","event_id":"sha256:34a57b3945a51cb9cc8442cc58951e0cca68f373297c0b9afd6a6a60c0f8e57e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZW3EGWPUI2XN4WT7K6U3MRRFLD/bundle.json","state_url":"https://pith.science/pith/ZW3EGWPUI2XN4WT7K6U3MRRFLD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZW3EGWPUI2XN4WT7K6U3MRRFLD/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":"2026-06-04T05:56:39Z","links":{"resolver":"https://pith.science/pith/ZW3EGWPUI2XN4WT7K6U3MRRFLD","bundle":"https://pith.science/pith/ZW3EGWPUI2XN4WT7K6U3MRRFLD/bundle.json","state":"https://pith.science/pith/ZW3EGWPUI2XN4WT7K6U3MRRFLD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZW3EGWPUI2XN4WT7K6U3MRRFLD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:ZW3EGWPUI2XN4WT7K6U3MRRFLD","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":"4316be7d654a0dad87bef77ffa00a4fba3daa5d9fc42b223ec5135480bbba5d5","cross_cats_sorted":["nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2017-06-29T07:43:19Z","title_canon_sha256":"549b6a15fc5629a9f34e86c3ed77aa05b00fe017efe2416c095bbaed9bb3d766"},"schema_version":"1.0","source":{"id":"1706.09609","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1706.09609","created_at":"2026-05-18T00:38:17Z"},{"alias_kind":"arxiv_version","alias_value":"1706.09609v2","created_at":"2026-05-18T00:38:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1706.09609","created_at":"2026-05-18T00:38:17Z"},{"alias_kind":"pith_short_12","alias_value":"ZW3EGWPUI2XN","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"ZW3EGWPUI2XN4WT7","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"ZW3EGWPU","created_at":"2026-05-18T12:31:59Z"}],"graph_snapshots":[{"event_id":"sha256:34a57b3945a51cb9cc8442cc58951e0cca68f373297c0b9afd6a6a60c0f8e57e","target":"graph","created_at":"2026-05-18T00:38:17Z","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 method is proposed to determine the one-neutron $S_n$ or two-neutron $S_{2n}$ separation energy of neutron-rich isotopes. Relationships between $S_n$ ($S_{2n}$) and isotopic cross sections have been deduced from an empirical formula, i.e., the cross section of an isotope exponentially depends on the average binding energy per nucleon $B/A$. The proposed relationships have been verified using the neutron-rich copper isotopes measured in the 64$A$ MeV $^{86}$Kr + $^{9}$Be reaction. $S_n$, $S_{2n}$, and $B/A$ for the very neutron-rich $^{77, 78, 79}$Cu isotopes are determined from the proposed ","authors_text":"Chun-Wang Ma, Hui-Ling Wei, Mian YU, Yi-Dan Song","cross_cats":["nucl-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2017-06-29T07:43:19Z","title":"Experimental Determination of One- and Two-Neutron Separation Energies for Neutron-Rich Copper Isotopes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.09609","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":"sha256:8e7d7ac04d60bbe1142a9ff7f234001618571272cbc9641346e3e3b26e0a1946","target":"record","created_at":"2026-05-18T00:38:17Z","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":"4316be7d654a0dad87bef77ffa00a4fba3daa5d9fc42b223ec5135480bbba5d5","cross_cats_sorted":["nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2017-06-29T07:43:19Z","title_canon_sha256":"549b6a15fc5629a9f34e86c3ed77aa05b00fe017efe2416c095bbaed9bb3d766"},"schema_version":"1.0","source":{"id":"1706.09609","kind":"arxiv","version":2}},"canonical_sha256":"cdb64359f446aede5a7f57a9b6462558faba82774e5ddf7d12ce8eeb9596b288","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cdb64359f446aede5a7f57a9b6462558faba82774e5ddf7d12ce8eeb9596b288","first_computed_at":"2026-05-18T00:38:17.798170Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:38:17.798170Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4R5H89909/tSP5U1YfqGAfCPWCfxEScEnyD+ID8KcmhZZEFJNZjYQXm7IU+Njst6LXCNTxLqeVWOlzHMuATiBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:38:17.798863Z","signed_message":"canonical_sha256_bytes"},"source_id":"1706.09609","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8e7d7ac04d60bbe1142a9ff7f234001618571272cbc9641346e3e3b26e0a1946","sha256:34a57b3945a51cb9cc8442cc58951e0cca68f373297c0b9afd6a6a60c0f8e57e"],"state_sha256":"4be536629e9cfeeda296c92a4e0318377d8a93fcd4fb3ed7cb6183bc511ad67b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1eMzYi9y3Q6AIyBZoIe8Y3VoNtRJG4arSxipzBMp8uwFL/Mu/nVxftqfmxUNSIJIJDeSbw5oWRTdJyqGEIEGDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T05:56:39.857700Z","bundle_sha256":"92354df1391f8103f9d298f54ab25f8234b202be5eb40eff7101732a8247726d"}}