{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:MKEKYVREAOELLWTAJ3CKLMQOKR","short_pith_number":"pith:MKEKYVRE","canonical_record":{"source":{"id":"1511.04228","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2015-11-13T10:55:17Z","cross_cats_sorted":[],"title_canon_sha256":"66a6b71406f9c969d3ea6882168b4ea83872a9d721e6157a0abbda647674d01a","abstract_canon_sha256":"b88b88ef043fa40b12b7acb6d3418ebdd0e2f3c4e4419eb66c8b3ca1e521c5b6"},"schema_version":"1.0"},"canonical_sha256":"6288ac56240388b5da604ec4a5b20e545889ab0ed415a825cf545d54e5c63493","source":{"kind":"arxiv","id":"1511.04228","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.04228","created_at":"2026-05-18T01:21:51Z"},{"alias_kind":"arxiv_version","alias_value":"1511.04228v2","created_at":"2026-05-18T01:21:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.04228","created_at":"2026-05-18T01:21:51Z"},{"alias_kind":"pith_short_12","alias_value":"MKEKYVREAOEL","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"MKEKYVREAOELLWTA","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"MKEKYVRE","created_at":"2026-05-18T12:29:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:MKEKYVREAOELLWTAJ3CKLMQOKR","target":"record","payload":{"canonical_record":{"source":{"id":"1511.04228","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2015-11-13T10:55:17Z","cross_cats_sorted":[],"title_canon_sha256":"66a6b71406f9c969d3ea6882168b4ea83872a9d721e6157a0abbda647674d01a","abstract_canon_sha256":"b88b88ef043fa40b12b7acb6d3418ebdd0e2f3c4e4419eb66c8b3ca1e521c5b6"},"schema_version":"1.0"},"canonical_sha256":"6288ac56240388b5da604ec4a5b20e545889ab0ed415a825cf545d54e5c63493","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:21:51.885173Z","signature_b64":"OBUE4s6W2cA2tU6gBVDREkJHbG77gLLaUP5M4UR3XGRB0nY/2clgoyFHK5+KFrvG/8zxzlpSK2XFgOUrGKN+AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6288ac56240388b5da604ec4a5b20e545889ab0ed415a825cf545d54e5c63493","last_reissued_at":"2026-05-18T01:21:51.884364Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:21:51.884364Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1511.04228","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":"2026-05-18T01:21:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QgkggtyHNLPS1OmJ/Qlw1WDYocmRpYoE18TRblUmOygrVLwJGq9HMXSGM9cWFHLalZ8EJS13kEgkPB+4AFzTAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T00:46:24.383258Z"},"content_sha256":"01c40bb7c425e7e7b427d56332a3632a8a4ac70e3170d83b39dc0e6a7d042a2c","schema_version":"1.0","event_id":"sha256:01c40bb7c425e7e7b427d56332a3632a8a4ac70e3170d83b39dc0e6a7d042a2c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:MKEKYVREAOELLWTAJ3CKLMQOKR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The lifetime of the bound excited level in Ni$^-$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"A. K\\\"allberg, A. Simonsson, D. Hanstorp, H. Cederquist, H. T. Schmidt, J. S. Thompson, K. C. Chartakunchand, M. Bj\\\"orkhage, M. Blom, M. Kami\\'nska, O. M. Hole, P. A. Neill, P. L\\\"ofgren, P. Reinhed, R. D. Thomas, R. F. Nascimento, S. Mannervik, S. Ros\\'en, V. T. Davis","submitted_at":"2015-11-13T10:55:17Z","abstract_excerpt":"The intrinsic lifetime of the upper level in the bound-bound 3d$^9$4s$^2$ $^2$D$_{3/2}$ $\\rightarrow$ 3d$^9$4s$^2$ $^2$D$_{5/2}$ radiative transition in Ni$^-$ was measured to be 15.1 $\\pm$ 0.4 s. The experiment was performed at cryogenic temperatures in one of the ion-beam storage rings of the DESIREE (Double ElectroStatic Ion Ring Experiment) facility at Stockholm University. The storage lifetime of the Ni$^-$ ion-beam was measured to be close to five minutes at a ring temperature of 13 K."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.04228","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":"2026-05-18T01:21:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/P+98CtuPBDOkIl+0OLyxTh6pcGbRAAxTfh5pwmok7Llju7nOEUE2ZInSAxhOrT8jAwd6Svm+VTBD71ybemeCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T00:46:24.383666Z"},"content_sha256":"26c0c102f29b9f415975da447bb0a4f08277c27aef02d17187f1a74101d33152","schema_version":"1.0","event_id":"sha256:26c0c102f29b9f415975da447bb0a4f08277c27aef02d17187f1a74101d33152"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MKEKYVREAOELLWTAJ3CKLMQOKR/bundle.json","state_url":"https://pith.science/pith/MKEKYVREAOELLWTAJ3CKLMQOKR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MKEKYVREAOELLWTAJ3CKLMQOKR/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":"2026-05-27T00:46:24Z","links":{"resolver":"https://pith.science/pith/MKEKYVREAOELLWTAJ3CKLMQOKR","bundle":"https://pith.science/pith/MKEKYVREAOELLWTAJ3CKLMQOKR/bundle.json","state":"https://pith.science/pith/MKEKYVREAOELLWTAJ3CKLMQOKR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MKEKYVREAOELLWTAJ3CKLMQOKR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:MKEKYVREAOELLWTAJ3CKLMQOKR","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":"b88b88ef043fa40b12b7acb6d3418ebdd0e2f3c4e4419eb66c8b3ca1e521c5b6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2015-11-13T10:55:17Z","title_canon_sha256":"66a6b71406f9c969d3ea6882168b4ea83872a9d721e6157a0abbda647674d01a"},"schema_version":"1.0","source":{"id":"1511.04228","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.04228","created_at":"2026-05-18T01:21:51Z"},{"alias_kind":"arxiv_version","alias_value":"1511.04228v2","created_at":"2026-05-18T01:21:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.04228","created_at":"2026-05-18T01:21:51Z"},{"alias_kind":"pith_short_12","alias_value":"MKEKYVREAOEL","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"MKEKYVREAOELLWTA","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"MKEKYVRE","created_at":"2026-05-18T12:29:32Z"}],"graph_snapshots":[{"event_id":"sha256:26c0c102f29b9f415975da447bb0a4f08277c27aef02d17187f1a74101d33152","target":"graph","created_at":"2026-05-18T01:21:51Z","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":"The intrinsic lifetime of the upper level in the bound-bound 3d$^9$4s$^2$ $^2$D$_{3/2}$ $\\rightarrow$ 3d$^9$4s$^2$ $^2$D$_{5/2}$ radiative transition in Ni$^-$ was measured to be 15.1 $\\pm$ 0.4 s. The experiment was performed at cryogenic temperatures in one of the ion-beam storage rings of the DESIREE (Double ElectroStatic Ion Ring Experiment) facility at Stockholm University. The storage lifetime of the Ni$^-$ ion-beam was measured to be close to five minutes at a ring temperature of 13 K.","authors_text":"A. K\\\"allberg, A. Simonsson, D. Hanstorp, H. Cederquist, H. T. Schmidt, J. S. Thompson, K. C. Chartakunchand, M. Bj\\\"orkhage, M. Blom, M. Kami\\'nska, O. M. Hole, P. A. Neill, P. L\\\"ofgren, P. Reinhed, R. D. Thomas, R. F. Nascimento, S. Mannervik, S. Ros\\'en, V. T. Davis","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2015-11-13T10:55:17Z","title":"The lifetime of the bound excited level in Ni$^-$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.04228","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":"sha256:01c40bb7c425e7e7b427d56332a3632a8a4ac70e3170d83b39dc0e6a7d042a2c","target":"record","created_at":"2026-05-18T01:21:51Z","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":"b88b88ef043fa40b12b7acb6d3418ebdd0e2f3c4e4419eb66c8b3ca1e521c5b6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2015-11-13T10:55:17Z","title_canon_sha256":"66a6b71406f9c969d3ea6882168b4ea83872a9d721e6157a0abbda647674d01a"},"schema_version":"1.0","source":{"id":"1511.04228","kind":"arxiv","version":2}},"canonical_sha256":"6288ac56240388b5da604ec4a5b20e545889ab0ed415a825cf545d54e5c63493","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6288ac56240388b5da604ec4a5b20e545889ab0ed415a825cf545d54e5c63493","first_computed_at":"2026-05-18T01:21:51.884364Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:21:51.884364Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OBUE4s6W2cA2tU6gBVDREkJHbG77gLLaUP5M4UR3XGRB0nY/2clgoyFHK5+KFrvG/8zxzlpSK2XFgOUrGKN+AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:21:51.885173Z","signed_message":"canonical_sha256_bytes"},"source_id":"1511.04228","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:01c40bb7c425e7e7b427d56332a3632a8a4ac70e3170d83b39dc0e6a7d042a2c","sha256:26c0c102f29b9f415975da447bb0a4f08277c27aef02d17187f1a74101d33152"],"state_sha256":"c249f4bc5329285149bdba74b3ed6f6616e52cb586528dcaa959196bf6709872"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SOw8P9pWNbRWR8+7Ey0uXbfO/a0HbSA/jMJd6agov2JJln9qP6yAMflPk6g1SwRnj43yV2p6kiTlcfL6yCi5CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T00:46:24.386392Z","bundle_sha256":"79d845a28931da56730faf7ed5575636e200afdc126019c4ddf5b4f64772d463"}}