{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:FSBG44F4UISTS6XR7HKL6K2XBC","short_pith_number":"pith:FSBG44F4","canonical_record":{"source":{"id":"2001.08744","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2020-01-23T14:21:27Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"1e121476831b301a00e91c87c96b1296c8e044b9e2f39ec6b21126bd89d9dcc7","abstract_canon_sha256":"66b166d59d88ecfc853f1e6985514fb5d4a9771ae73ef05dc3b8842681ca89eb"},"schema_version":"1.0"},"canonical_sha256":"2c826e70bca225397af1f9d4bf2b5708a120a204114a6cc2b1dc177415967518","source":{"kind":"arxiv","id":"2001.08744","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2001.08744","created_at":"2026-07-05T00:45:21Z"},{"alias_kind":"arxiv_version","alias_value":"2001.08744v2","created_at":"2026-07-05T00:45:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2001.08744","created_at":"2026-07-05T00:45:21Z"},{"alias_kind":"pith_short_12","alias_value":"FSBG44F4UIST","created_at":"2026-07-05T00:45:21Z"},{"alias_kind":"pith_short_16","alias_value":"FSBG44F4UISTS6XR","created_at":"2026-07-05T00:45:21Z"},{"alias_kind":"pith_short_8","alias_value":"FSBG44F4","created_at":"2026-07-05T00:45:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:FSBG44F4UISTS6XR7HKL6K2XBC","target":"record","payload":{"canonical_record":{"source":{"id":"2001.08744","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2020-01-23T14:21:27Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"1e121476831b301a00e91c87c96b1296c8e044b9e2f39ec6b21126bd89d9dcc7","abstract_canon_sha256":"66b166d59d88ecfc853f1e6985514fb5d4a9771ae73ef05dc3b8842681ca89eb"},"schema_version":"1.0"},"canonical_sha256":"2c826e70bca225397af1f9d4bf2b5708a120a204114a6cc2b1dc177415967518","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:45:21.597160Z","signature_b64":"3W4PcmBX9dJb1s6kzIs5s0UFj2buTOng86iTEsngYyTvd0mKG6n7t0hiH63kUbRBmA5Qd5Y6jKMqrTmkThg6DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2c826e70bca225397af1f9d4bf2b5708a120a204114a6cc2b1dc177415967518","last_reissued_at":"2026-07-05T00:45:21.596708Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:45:21.596708Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2001.08744","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":"2026-07-05T00:45:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aBZa8846Y5DcPZRAESq5UWSlCTBIKpYmtxreiO21CiaBGIOKBCkE2qh9CEoshAXzEoCGe0k8agU792BMZcSsCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T03:46:32.628889Z"},"content_sha256":"d8780487d45287631c7be50020c52f97fddc725e490bfb54c938f42712299293","schema_version":"1.0","event_id":"sha256:d8780487d45287631c7be50020c52f97fddc725e490bfb54c938f42712299293"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:FSBG44F4UISTS6XR7HKL6K2XBC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A new approach to monitor 13C-targets degradation in situ for 13C(alpha,n)16O cross-section measurements at LUNA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"physics.ins-det","authors_text":"A. Best, A. Boeltzig, A. Caciolli, A. Di Leva, A. Formicola, A. Guglielmetti, C. Broggini, C.G. Bruno, C. Gustavino, D. Bemmerer, D.Piatti, D. Trezzi, E. Masha, E.M. Fiore, F. Barile, F. Cavanna, F. Ferraro, F.R.Pantaleo, F.Terrasi, G.F. Ciani, G. Gervino, G. Imbriani, Gy. Gyurky, I. Kochanek, J. Balibrea-Correa, K. Stockel, L. Csedreki, L. Di Paolo, L. Schiavulli, M. Aliotta, M.Junker, M. Lugaro, M.P.Takacs, O. Straniero, P. Colombetti, P. Corvisiero, P.Marigo, P. Prati, R.Depalo, R. Menegazzo, R. Perrino, S. Zavatarelli, T. Chillery, T. Davinson, T. Szucs, V. Mossa, V.Paticchio, Z. Elekes, Zs. Fulop","submitted_at":"2020-01-23T14:21:27Z","abstract_excerpt":"Direct measurements of reaction cross-sections at astrophysical energies often require the use of solid targets able to withstand high ion beam currents for extended periods of time. Thus, monitoring target thickness, isotopic composition, and target stoichiometry during data taking is critical to account for possible target modifications and to reduce uncertainties in the final cross-section results. A common technique used for these purposes is the Nuclear Resonant Reaction Analysis (NRRA), which however requires that a narrow resonance be available inside the dynamic range of the accelerato"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2001.08744","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2001.08744/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:45:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NuSSWyK1eWylukNhhqOcCDU2Zqeh/+4LtgDyJAoKBwAitwVqJ2rv4ecft1o9Osf7OP8cPrmBXqUHqgHJYnNMAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T03:46:32.629745Z"},"content_sha256":"c383aa179e07cc5ca6dd73e8b8f419d6218e585dc05496295abc0ce1d4983674","schema_version":"1.0","event_id":"sha256:c383aa179e07cc5ca6dd73e8b8f419d6218e585dc05496295abc0ce1d4983674"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FSBG44F4UISTS6XR7HKL6K2XBC/bundle.json","state_url":"https://pith.science/pith/FSBG44F4UISTS6XR7HKL6K2XBC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FSBG44F4UISTS6XR7HKL6K2XBC/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":"2026-08-17T03:46:32Z","links":{"resolver":"https://pith.science/pith/FSBG44F4UISTS6XR7HKL6K2XBC","bundle":"https://pith.science/pith/FSBG44F4UISTS6XR7HKL6K2XBC/bundle.json","state":"https://pith.science/pith/FSBG44F4UISTS6XR7HKL6K2XBC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FSBG44F4UISTS6XR7HKL6K2XBC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:FSBG44F4UISTS6XR7HKL6K2XBC","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":"66b166d59d88ecfc853f1e6985514fb5d4a9771ae73ef05dc3b8842681ca89eb","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2020-01-23T14:21:27Z","title_canon_sha256":"1e121476831b301a00e91c87c96b1296c8e044b9e2f39ec6b21126bd89d9dcc7"},"schema_version":"1.0","source":{"id":"2001.08744","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2001.08744","created_at":"2026-07-05T00:45:21Z"},{"alias_kind":"arxiv_version","alias_value":"2001.08744v2","created_at":"2026-07-05T00:45:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2001.08744","created_at":"2026-07-05T00:45:21Z"},{"alias_kind":"pith_short_12","alias_value":"FSBG44F4UIST","created_at":"2026-07-05T00:45:21Z"},{"alias_kind":"pith_short_16","alias_value":"FSBG44F4UISTS6XR","created_at":"2026-07-05T00:45:21Z"},{"alias_kind":"pith_short_8","alias_value":"FSBG44F4","created_at":"2026-07-05T00:45:21Z"}],"graph_snapshots":[{"event_id":"sha256:c383aa179e07cc5ca6dd73e8b8f419d6218e585dc05496295abc0ce1d4983674","target":"graph","created_at":"2026-07-05T00:45:21Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2001.08744/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Direct measurements of reaction cross-sections at astrophysical energies often require the use of solid targets able to withstand high ion beam currents for extended periods of time. Thus, monitoring target thickness, isotopic composition, and target stoichiometry during data taking is critical to account for possible target modifications and to reduce uncertainties in the final cross-section results. A common technique used for these purposes is the Nuclear Resonant Reaction Analysis (NRRA), which however requires that a narrow resonance be available inside the dynamic range of the accelerato","authors_text":"A. Best, A. Boeltzig, A. Caciolli, A. Di Leva, A. Formicola, A. Guglielmetti, C. Broggini, C.G. Bruno, C. Gustavino, D. Bemmerer, D.Piatti, D. Trezzi, E. Masha, E.M. Fiore, F. Barile, F. Cavanna, F. Ferraro, F.R.Pantaleo, F.Terrasi, G.F. Ciani, G. Gervino, G. Imbriani, Gy. Gyurky, I. Kochanek, J. Balibrea-Correa, K. Stockel, L. Csedreki, L. Di Paolo, L. Schiavulli, M. Aliotta, M.Junker, M. Lugaro, M.P.Takacs, O. Straniero, P. Colombetti, P. Corvisiero, P.Marigo, P. Prati, R.Depalo, R. Menegazzo, R. Perrino, S. Zavatarelli, T. Chillery, T. Davinson, T. Szucs, V. Mossa, V.Paticchio, Z. Elekes, Zs. Fulop","cross_cats":["nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2020-01-23T14:21:27Z","title":"A new approach to monitor 13C-targets degradation in situ for 13C(alpha,n)16O cross-section measurements at LUNA"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2001.08744","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:d8780487d45287631c7be50020c52f97fddc725e490bfb54c938f42712299293","target":"record","created_at":"2026-07-05T00:45:21Z","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":"66b166d59d88ecfc853f1e6985514fb5d4a9771ae73ef05dc3b8842681ca89eb","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2020-01-23T14:21:27Z","title_canon_sha256":"1e121476831b301a00e91c87c96b1296c8e044b9e2f39ec6b21126bd89d9dcc7"},"schema_version":"1.0","source":{"id":"2001.08744","kind":"arxiv","version":2}},"canonical_sha256":"2c826e70bca225397af1f9d4bf2b5708a120a204114a6cc2b1dc177415967518","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2c826e70bca225397af1f9d4bf2b5708a120a204114a6cc2b1dc177415967518","first_computed_at":"2026-07-05T00:45:21.596708Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:45:21.596708Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3W4PcmBX9dJb1s6kzIs5s0UFj2buTOng86iTEsngYyTvd0mKG6n7t0hiH63kUbRBmA5Qd5Y6jKMqrTmkThg6DA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:45:21.597160Z","signed_message":"canonical_sha256_bytes"},"source_id":"2001.08744","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d8780487d45287631c7be50020c52f97fddc725e490bfb54c938f42712299293","sha256:c383aa179e07cc5ca6dd73e8b8f419d6218e585dc05496295abc0ce1d4983674"],"state_sha256":"5acb974092ce7984079380c72c5057c9300373424e808fb2c2f7214d1a00f671"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dn0WOpE+pVPZAM5KwGb2Zs1IBa3pYIGSvhtLdROvafSdZCoQf1KWDraQ3vrmGrqmq+DKk0Ei8KGDbK526/iZDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T03:46:32.639272Z","bundle_sha256":"6c1f3b4c299e09795cce98162d8a4d29912b3bb9b6e4fe8ce9bf2181407219ac"}}