{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:XWFNK7XIZSXANICCIAQUPWSBOM","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":"80b7324a292776e16dab435b1c1ad1fa7c471b16a46b4cc24d0becc9dac1a51f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2011-06-13T11:56:48Z","title_canon_sha256":"a4bda9eb2e08cba36bedc2965e6d0a21b40ed76480587ff490b6475ca8d18dfa"},"schema_version":"1.0","source":{"id":"1106.2421","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.2421","created_at":"2026-05-18T04:04:18Z"},{"alias_kind":"arxiv_version","alias_value":"1106.2421v1","created_at":"2026-05-18T04:04:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.2421","created_at":"2026-05-18T04:04:18Z"},{"alias_kind":"pith_short_12","alias_value":"XWFNK7XIZSXA","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_16","alias_value":"XWFNK7XIZSXANICC","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_8","alias_value":"XWFNK7XI","created_at":"2026-05-18T12:26:47Z"}],"graph_snapshots":[{"event_id":"sha256:18c788adfa311960f02d6046efadda8f2d8113a2b6dd52a70edded1f1361825e","target":"graph","created_at":"2026-05-18T04:04:18Z","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":"We systematically derive a length scale characterizing the size of a low-lying, beta stable nucleus from empirical data for the diffraction peak angle in the proton inelastic differential cross section of incident energy of \\sim 1 GeV. In doing so, we assume that the target nucleus in the ground state is a completely absorptive \"black\" sphere of radius a. The cross section \\pi a^2, where a is determined in such a way as to reproduce the empirical proton diffraction peak angle in the elastic channel, is known to agree with empirical total reaction cross sections for incident protons to within e","authors_text":"Akihisa Kohama, Kazuhiro Oyamatsu, Kei Iida, Shinya Koide","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2011-06-13T11:56:48Z","title":"Proton inelastic diffraction by a black nucleus and the size of excited nuclei"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.2421","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":"sha256:68edcd8e35c2076c377dee3ad4f1e6983b2d1d78158a61368b50add051397686","target":"record","created_at":"2026-05-18T04:04:18Z","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":"80b7324a292776e16dab435b1c1ad1fa7c471b16a46b4cc24d0becc9dac1a51f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2011-06-13T11:56:48Z","title_canon_sha256":"a4bda9eb2e08cba36bedc2965e6d0a21b40ed76480587ff490b6475ca8d18dfa"},"schema_version":"1.0","source":{"id":"1106.2421","kind":"arxiv","version":1}},"canonical_sha256":"bd8ad57ee8ccae06a042402147da41730706a255312d8f13df28ad7b0ea88802","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bd8ad57ee8ccae06a042402147da41730706a255312d8f13df28ad7b0ea88802","first_computed_at":"2026-05-18T04:04:18.987270Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:04:18.987270Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oLV1Ub2yN95bWZ5R0zeiTGTMaPRtm0CwyheM45reVknTA+orZUtHcIOntDkMFSI2eKYR45siafc6AS84gYXuDA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:04:18.987875Z","signed_message":"canonical_sha256_bytes"},"source_id":"1106.2421","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:68edcd8e35c2076c377dee3ad4f1e6983b2d1d78158a61368b50add051397686","sha256:18c788adfa311960f02d6046efadda8f2d8113a2b6dd52a70edded1f1361825e"],"state_sha256":"ee31a0e411b7024e4678188dced3b652dd1daec2a5310fb44f757efa8c4bb9f0"}