{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:NBZPE3OBQTYM7YXGKBS6STCBUW","short_pith_number":"pith:NBZPE3OB","canonical_record":{"source":{"id":"1906.07977","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2019-06-19T08:55:53Z","cross_cats_sorted":[],"title_canon_sha256":"ffdb31d4a93f1b40a550459c1d1f38f9d1b389b3a20cdfac084ceb6edee28ff8","abstract_canon_sha256":"be9e2c119dcf198075df2d91b75d10902cde63d37fc1b9a03db15073af502507"},"schema_version":"1.0"},"canonical_sha256":"6872f26dc184f0cfe2e65065e94c41a58910954b9741202d53940bc4778565e9","source":{"kind":"arxiv","id":"1906.07977","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.07977","created_at":"2026-07-04T23:50:41Z"},{"alias_kind":"arxiv_version","alias_value":"1906.07977v1","created_at":"2026-07-04T23:50:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.07977","created_at":"2026-07-04T23:50:41Z"},{"alias_kind":"pith_short_12","alias_value":"NBZPE3OBQTYM","created_at":"2026-07-04T23:50:41Z"},{"alias_kind":"pith_short_16","alias_value":"NBZPE3OBQTYM7YXG","created_at":"2026-07-04T23:50:41Z"},{"alias_kind":"pith_short_8","alias_value":"NBZPE3OB","created_at":"2026-07-04T23:50:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:NBZPE3OBQTYM7YXGKBS6STCBUW","target":"record","payload":{"canonical_record":{"source":{"id":"1906.07977","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2019-06-19T08:55:53Z","cross_cats_sorted":[],"title_canon_sha256":"ffdb31d4a93f1b40a550459c1d1f38f9d1b389b3a20cdfac084ceb6edee28ff8","abstract_canon_sha256":"be9e2c119dcf198075df2d91b75d10902cde63d37fc1b9a03db15073af502507"},"schema_version":"1.0"},"canonical_sha256":"6872f26dc184f0cfe2e65065e94c41a58910954b9741202d53940bc4778565e9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:50:41.143155Z","signature_b64":"lJr3otE7KLJxRT3oCBXhneEt7bBWnVJcRjcagyssnZ8x2nVp2nPDKfS0fqWff4nLfF5+8YuzTUk2iplSFNrABw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6872f26dc184f0cfe2e65065e94c41a58910954b9741202d53940bc4778565e9","last_reissued_at":"2026-07-04T23:50:41.142667Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:50:41.142667Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.07977","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T23:50:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q4H9WgKdVY9BUoVlgQs1eDPevQD/Mer8rbyIWnZG7tNLHWqjqqjcRK2MpMv+YFSH5+GedAoOWwEqoss/86XMDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T12:24:03.949637Z"},"content_sha256":"1fae4e70460ea1052af479bdf669aae05469f6dde481420eb68bd2c46c6ae380","schema_version":"1.0","event_id":"sha256:1fae4e70460ea1052af479bdf669aae05469f6dde481420eb68bd2c46c6ae380"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:NBZPE3OBQTYM7YXGKBS6STCBUW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Soft breathing modes in neutron--rich nuclei with the subtracted second random--phase approximation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-th","authors_text":"D. Gambacurta, M. Grasso, O. Sorlin","submitted_at":"2019-06-19T08:55:53Z","abstract_excerpt":"We analyze the isoscalar response related to breathing modes with particular attention being paid to low-lying excitations in neutron--rich nuclei. We use the subtracted second random--phase approximation (SSRPA) to describe microscopically the response. By increasing the neutron excess, we study the evolution of the response in Ca isotopes going from $^{40}$Ca to $^{48}$Ca and to $^{60}$Ca as well as in $N=20$ isotones going from $^{40}$Ca to $^{36}$S and to $^{34}$Si. Finally, the case of $^{68}$Ni is investigated. We predict soft monopole modes in neutron--rich nuclei which are driven by ne"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.07977","kind":"arxiv","version":1},"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/1906.07977/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":"2026-07-04T23:50:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7nfSzNWsU3P8NlFCzmC3JvtSnVmB88NbHqds4GeV/29EnbhzbUkThSl2b0bmSkA29xKzFAjQsenJ+EPpeMA8Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T12:24:03.950010Z"},"content_sha256":"e82536f5f68b901c98a43ba790527ff37b45c4fdd4b18411daca640f1b17fbcc","schema_version":"1.0","event_id":"sha256:e82536f5f68b901c98a43ba790527ff37b45c4fdd4b18411daca640f1b17fbcc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NBZPE3OBQTYM7YXGKBS6STCBUW/bundle.json","state_url":"https://pith.science/pith/NBZPE3OBQTYM7YXGKBS6STCBUW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NBZPE3OBQTYM7YXGKBS6STCBUW/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":"2026-07-06T12:24:03Z","links":{"resolver":"https://pith.science/pith/NBZPE3OBQTYM7YXGKBS6STCBUW","bundle":"https://pith.science/pith/NBZPE3OBQTYM7YXGKBS6STCBUW/bundle.json","state":"https://pith.science/pith/NBZPE3OBQTYM7YXGKBS6STCBUW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NBZPE3OBQTYM7YXGKBS6STCBUW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:NBZPE3OBQTYM7YXGKBS6STCBUW","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":"be9e2c119dcf198075df2d91b75d10902cde63d37fc1b9a03db15073af502507","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2019-06-19T08:55:53Z","title_canon_sha256":"ffdb31d4a93f1b40a550459c1d1f38f9d1b389b3a20cdfac084ceb6edee28ff8"},"schema_version":"1.0","source":{"id":"1906.07977","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.07977","created_at":"2026-07-04T23:50:41Z"},{"alias_kind":"arxiv_version","alias_value":"1906.07977v1","created_at":"2026-07-04T23:50:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.07977","created_at":"2026-07-04T23:50:41Z"},{"alias_kind":"pith_short_12","alias_value":"NBZPE3OBQTYM","created_at":"2026-07-04T23:50:41Z"},{"alias_kind":"pith_short_16","alias_value":"NBZPE3OBQTYM7YXG","created_at":"2026-07-04T23:50:41Z"},{"alias_kind":"pith_short_8","alias_value":"NBZPE3OB","created_at":"2026-07-04T23:50:41Z"}],"graph_snapshots":[{"event_id":"sha256:e82536f5f68b901c98a43ba790527ff37b45c4fdd4b18411daca640f1b17fbcc","target":"graph","created_at":"2026-07-04T23:50:41Z","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/1906.07977/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We analyze the isoscalar response related to breathing modes with particular attention being paid to low-lying excitations in neutron--rich nuclei. We use the subtracted second random--phase approximation (SSRPA) to describe microscopically the response. By increasing the neutron excess, we study the evolution of the response in Ca isotopes going from $^{40}$Ca to $^{48}$Ca and to $^{60}$Ca as well as in $N=20$ isotones going from $^{40}$Ca to $^{36}$S and to $^{34}$Si. Finally, the case of $^{68}$Ni is investigated. We predict soft monopole modes in neutron--rich nuclei which are driven by ne","authors_text":"D. Gambacurta, M. Grasso, O. Sorlin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2019-06-19T08:55:53Z","title":"Soft breathing modes in neutron--rich nuclei with the subtracted second random--phase approximation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.07977","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":"sha256:1fae4e70460ea1052af479bdf669aae05469f6dde481420eb68bd2c46c6ae380","target":"record","created_at":"2026-07-04T23:50:41Z","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":"be9e2c119dcf198075df2d91b75d10902cde63d37fc1b9a03db15073af502507","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2019-06-19T08:55:53Z","title_canon_sha256":"ffdb31d4a93f1b40a550459c1d1f38f9d1b389b3a20cdfac084ceb6edee28ff8"},"schema_version":"1.0","source":{"id":"1906.07977","kind":"arxiv","version":1}},"canonical_sha256":"6872f26dc184f0cfe2e65065e94c41a58910954b9741202d53940bc4778565e9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6872f26dc184f0cfe2e65065e94c41a58910954b9741202d53940bc4778565e9","first_computed_at":"2026-07-04T23:50:41.142667Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:50:41.142667Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lJr3otE7KLJxRT3oCBXhneEt7bBWnVJcRjcagyssnZ8x2nVp2nPDKfS0fqWff4nLfF5+8YuzTUk2iplSFNrABw==","signature_status":"signed_v1","signed_at":"2026-07-04T23:50:41.143155Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.07977","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1fae4e70460ea1052af479bdf669aae05469f6dde481420eb68bd2c46c6ae380","sha256:e82536f5f68b901c98a43ba790527ff37b45c4fdd4b18411daca640f1b17fbcc"],"state_sha256":"5a87f34e97c75262fdf1bbb746acde212f681f8c7126a398e2caaac07cfb9c1c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8RVAkOBaPaNRMVPIc+UkZA+R8D3dtPIrzGMsmpZ/DzPArriilbiUcPMjbrSqkCYLYWB9mZqY/SqyYh0jeH4VAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T12:24:03.952245Z","bundle_sha256":"571478625997e6d387f87461e768ecaeb278ef81a7718d085a28dc7492eeb4c8"}}