{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:SGQQCNOPP7EBVSSHEROUYRBQ4L","short_pith_number":"pith:SGQQCNOP","canonical_record":{"source":{"id":"2601.03961","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2026-01-07T14:22:51Z","cross_cats_sorted":[],"title_canon_sha256":"8a74a0865b1bdb51394abff80ad0115402211feb46db8be24849c3f0b8739505","abstract_canon_sha256":"90b0c646ffc8f23b7f4637b471e8fcd7114b959f7e67eca0c6838f968fd7cb14"},"schema_version":"1.0"},"canonical_sha256":"91a10135cf7fc81aca47245d4c4430e2f3bfee4141867851785cc8114e2d10de","source":{"kind":"arxiv","id":"2601.03961","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2601.03961","created_at":"2026-05-22T01:03:16Z"},{"alias_kind":"arxiv_version","alias_value":"2601.03961v1","created_at":"2026-05-22T01:03:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2601.03961","created_at":"2026-05-22T01:03:16Z"},{"alias_kind":"pith_short_12","alias_value":"SGQQCNOPP7EB","created_at":"2026-05-22T01:03:16Z"},{"alias_kind":"pith_short_16","alias_value":"SGQQCNOPP7EBVSSH","created_at":"2026-05-22T01:03:16Z"},{"alias_kind":"pith_short_8","alias_value":"SGQQCNOP","created_at":"2026-05-22T01:03:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:SGQQCNOPP7EBVSSHEROUYRBQ4L","target":"record","payload":{"canonical_record":{"source":{"id":"2601.03961","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2026-01-07T14:22:51Z","cross_cats_sorted":[],"title_canon_sha256":"8a74a0865b1bdb51394abff80ad0115402211feb46db8be24849c3f0b8739505","abstract_canon_sha256":"90b0c646ffc8f23b7f4637b471e8fcd7114b959f7e67eca0c6838f968fd7cb14"},"schema_version":"1.0"},"canonical_sha256":"91a10135cf7fc81aca47245d4c4430e2f3bfee4141867851785cc8114e2d10de","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-22T01:03:16.872942Z","signature_b64":"hJ6AmktnNW+6AVt6yAYlQi4TSe3LuWw/UyaSj9YWryfzM3l1PKXMxXDDv2oYTWqGa1Q2TotnrlI1giIJogGDCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"91a10135cf7fc81aca47245d4c4430e2f3bfee4141867851785cc8114e2d10de","last_reissued_at":"2026-05-22T01:03:16.872018Z","signature_status":"signed_v1","first_computed_at":"2026-05-22T01:03:16.872018Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2601.03961","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":"2026-05-22T01:03:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6ZdscvzVscoCNKrDJzqeaZNr7GqdcmZ0OXCZofKWYVOMlDrfFfDWKSCGUBLiTPx1JqeVwR/Hr4Cy+gQmrkmRCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T10:53:34.313511Z"},"content_sha256":"78cf438f73bbf6c1c937ebea138a9ea8a9e26e3b4a8984a0fe47b46c6450f630","schema_version":"1.0","event_id":"sha256:78cf438f73bbf6c1c937ebea138a9ea8a9e26e3b4a8984a0fe47b46c6450f630"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:SGQQCNOPP7EBVSSHEROUYRBQ4L","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A ground state $^{22}$Al halo is unlikely","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Adams, B. Jonson, B. S. O. Johansson, C. S. Sumithrarachchi, C. Wrede, E. A. M. Jensen, H. O. U. Fynbo, J. Dopfer, J. S. Nielsen, K. Riisager, L. E. Weghorn, L. J. Sun, M. J. G. Borge, M. Madurga, O. Tengblad, T. Wheeler","submitted_at":"2026-01-07T14:22:51Z","abstract_excerpt":"We report the decisive resolution of the ground state spin and parity of the proton-dripline nucleus $^{22}$Al, a prime candidate for a proton halo. The resolution stems from the first $\\beta$-delayed charged particle emission experiment in the Gas Stopping Area at the Facility for Rare Isotope Beams (FRIB), leveraging high-intensity, low-energy beams extracted from the Advanced Cryogenic Gas Stopper (ACGS). The pristine beam quality from FRIB and the ACGS enabled a sensitive particle identification technique using thin silicon detectors, allowing for the suppression of the dominant proton bac"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2601.03961","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/2601.03961/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":"2026-05-22T01:03:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QPDZDz/PKGKkAHme/iQKJN7g5PvIzY31DVylIGtRqJ5dMidxWEgH4YnKm4HwJpHQpTtTXGDhqUQDR8dKlIRyDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T10:53:34.314296Z"},"content_sha256":"d2781f009507707abc94e06955cccf1c0c68726981f13d5070a7c2400ca6d209","schema_version":"1.0","event_id":"sha256:d2781f009507707abc94e06955cccf1c0c68726981f13d5070a7c2400ca6d209"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SGQQCNOPP7EBVSSHEROUYRBQ4L/bundle.json","state_url":"https://pith.science/pith/SGQQCNOPP7EBVSSHEROUYRBQ4L/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SGQQCNOPP7EBVSSHEROUYRBQ4L/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":"2026-05-31T10:53:34Z","links":{"resolver":"https://pith.science/pith/SGQQCNOPP7EBVSSHEROUYRBQ4L","bundle":"https://pith.science/pith/SGQQCNOPP7EBVSSHEROUYRBQ4L/bundle.json","state":"https://pith.science/pith/SGQQCNOPP7EBVSSHEROUYRBQ4L/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SGQQCNOPP7EBVSSHEROUYRBQ4L/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:SGQQCNOPP7EBVSSHEROUYRBQ4L","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":"90b0c646ffc8f23b7f4637b471e8fcd7114b959f7e67eca0c6838f968fd7cb14","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2026-01-07T14:22:51Z","title_canon_sha256":"8a74a0865b1bdb51394abff80ad0115402211feb46db8be24849c3f0b8739505"},"schema_version":"1.0","source":{"id":"2601.03961","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2601.03961","created_at":"2026-05-22T01:03:16Z"},{"alias_kind":"arxiv_version","alias_value":"2601.03961v1","created_at":"2026-05-22T01:03:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2601.03961","created_at":"2026-05-22T01:03:16Z"},{"alias_kind":"pith_short_12","alias_value":"SGQQCNOPP7EB","created_at":"2026-05-22T01:03:16Z"},{"alias_kind":"pith_short_16","alias_value":"SGQQCNOPP7EBVSSH","created_at":"2026-05-22T01:03:16Z"},{"alias_kind":"pith_short_8","alias_value":"SGQQCNOP","created_at":"2026-05-22T01:03:16Z"}],"graph_snapshots":[{"event_id":"sha256:d2781f009507707abc94e06955cccf1c0c68726981f13d5070a7c2400ca6d209","target":"graph","created_at":"2026-05-22T01:03:16Z","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/2601.03961/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report the decisive resolution of the ground state spin and parity of the proton-dripline nucleus $^{22}$Al, a prime candidate for a proton halo. The resolution stems from the first $\\beta$-delayed charged particle emission experiment in the Gas Stopping Area at the Facility for Rare Isotope Beams (FRIB), leveraging high-intensity, low-energy beams extracted from the Advanced Cryogenic Gas Stopper (ACGS). The pristine beam quality from FRIB and the ACGS enabled a sensitive particle identification technique using thin silicon detectors, allowing for the suppression of the dominant proton bac","authors_text":"A. Adams, B. Jonson, B. S. O. Johansson, C. S. Sumithrarachchi, C. Wrede, E. A. M. Jensen, H. O. U. Fynbo, J. Dopfer, J. S. Nielsen, K. Riisager, L. E. Weghorn, L. J. Sun, M. J. G. Borge, M. Madurga, O. Tengblad, T. Wheeler","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2026-01-07T14:22:51Z","title":"A ground state $^{22}$Al halo is unlikely"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2601.03961","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":"sha256:78cf438f73bbf6c1c937ebea138a9ea8a9e26e3b4a8984a0fe47b46c6450f630","target":"record","created_at":"2026-05-22T01:03:16Z","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":"90b0c646ffc8f23b7f4637b471e8fcd7114b959f7e67eca0c6838f968fd7cb14","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2026-01-07T14:22:51Z","title_canon_sha256":"8a74a0865b1bdb51394abff80ad0115402211feb46db8be24849c3f0b8739505"},"schema_version":"1.0","source":{"id":"2601.03961","kind":"arxiv","version":1}},"canonical_sha256":"91a10135cf7fc81aca47245d4c4430e2f3bfee4141867851785cc8114e2d10de","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"91a10135cf7fc81aca47245d4c4430e2f3bfee4141867851785cc8114e2d10de","first_computed_at":"2026-05-22T01:03:16.872018Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-22T01:03:16.872018Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hJ6AmktnNW+6AVt6yAYlQi4TSe3LuWw/UyaSj9YWryfzM3l1PKXMxXDDv2oYTWqGa1Q2TotnrlI1giIJogGDCA==","signature_status":"signed_v1","signed_at":"2026-05-22T01:03:16.872942Z","signed_message":"canonical_sha256_bytes"},"source_id":"2601.03961","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:78cf438f73bbf6c1c937ebea138a9ea8a9e26e3b4a8984a0fe47b46c6450f630","sha256:d2781f009507707abc94e06955cccf1c0c68726981f13d5070a7c2400ca6d209"],"state_sha256":"ef2663ed723aab4a995ab700eba4fe5a9d19c5d720bc9c65edffc15340a627c4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fB5h/NVxG8wkL2gYOiILQ11xZuNespc0n/j7gGQBkTxwLNo4t4Vichhi+7hACrNKMB7YA39Cvkoq5q3tjclQAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T10:53:34.318637Z","bundle_sha256":"cb2eb15f7119ecece42c63ceede9d153e9226f15106275d98f32cc4d162e3c27"}}