{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:THQGVAAPDHG5CA6NZU7TZXPMBI","short_pith_number":"pith:THQGVAAP","canonical_record":{"source":{"id":"1803.10518","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-03-28T10:46:11Z","cross_cats_sorted":[],"title_canon_sha256":"8d02a6ad9603e27e2edb07c02f80becd1ee464623c30ffc0be3cc113f89a1d4e","abstract_canon_sha256":"b9689d55fab4129f5d91b61d5a57b996f32b4c9e56ec6e555ddbf44bef63d24e"},"schema_version":"1.0"},"canonical_sha256":"99e06a800f19cdd103cdcd3f3cddec0a2cffb63373fa439bdb24d7f7dc8aca1a","source":{"kind":"arxiv","id":"1803.10518","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.10518","created_at":"2026-05-18T00:19:40Z"},{"alias_kind":"arxiv_version","alias_value":"1803.10518v2","created_at":"2026-05-18T00:19:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.10518","created_at":"2026-05-18T00:19:40Z"},{"alias_kind":"pith_short_12","alias_value":"THQGVAAPDHG5","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_16","alias_value":"THQGVAAPDHG5CA6N","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_8","alias_value":"THQGVAAP","created_at":"2026-05-18T12:32:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:THQGVAAPDHG5CA6NZU7TZXPMBI","target":"record","payload":{"canonical_record":{"source":{"id":"1803.10518","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-03-28T10:46:11Z","cross_cats_sorted":[],"title_canon_sha256":"8d02a6ad9603e27e2edb07c02f80becd1ee464623c30ffc0be3cc113f89a1d4e","abstract_canon_sha256":"b9689d55fab4129f5d91b61d5a57b996f32b4c9e56ec6e555ddbf44bef63d24e"},"schema_version":"1.0"},"canonical_sha256":"99e06a800f19cdd103cdcd3f3cddec0a2cffb63373fa439bdb24d7f7dc8aca1a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:19:40.867621Z","signature_b64":"vVO/FI7kZe/7P6qkutUPB2HUS03sBQIE2YTtEi7EQKcq+Uuv7dfGCJz1S6hJIaXGa/ZnIxv1XmSYxckowSnaDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"99e06a800f19cdd103cdcd3f3cddec0a2cffb63373fa439bdb24d7f7dc8aca1a","last_reissued_at":"2026-05-18T00:19:40.867119Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:19:40.867119Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.10518","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":"2026-05-18T00:19:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SKQd3oaDo1g4dlAvv8V0rOJQa6qi3wUcB/6kqQyC3koXJM43WMEGuid9NATP4iPoq5isBNcFU5nuOszEm2DjDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T03:06:17.201914Z"},"content_sha256":"26596246a1b0cff6ce8bee377e95cf339ad7b667135819548df01620c3560992","schema_version":"1.0","event_id":"sha256:26596246a1b0cff6ce8bee377e95cf339ad7b667135819548df01620c3560992"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:THQGVAAPDHG5CA6NZU7TZXPMBI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Rotationally cold OH$^-$ ions in the cryogenic electrostatic ion-beam storage ring DESIREE","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"A. K\\\"allberg, A. Simonsson, E. K. Anderson, G. Eklund, H. Cederquist, H. T. Schmidt, H. Zettergren, K. C. Chartkunchand, M. Gatchell, M. Kami\\'nska, M. K. Kristiansson, N. de Ruette, P. L\\\"ofgren, P. Reinhed, R. D. Thomas, S. Mannervik, S. Ros\\'en","submitted_at":"2018-03-28T10:46:11Z","abstract_excerpt":"We apply near-threshold laser photodetachment to characterize the rotational quantum level distribution of OH$^-$ ions stored in the cryogenic ion-beam storage ring, DESIREE, at Stockholm University. We find that the stored ions relax to a rotational temperature of 13.4$\\pm$0.2 K with 94.9$\\pm$0.3 % of the ions in the rotational ground state. This is consistent with the storage ring temperature of 13.5$\\pm$0.5 K as measured with eight silicon diodes, but in contrast to all earlier studies in cryogenic traps and rings where the rotational temperatures were always much higher than those of the s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.10518","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":"2026-05-18T00:19:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7VYn1aLXqrg27NbtZQ4ymsuGozVcPhwyVb05QpVhks8yzUPs6cg8/9WrcYDeEwCE8e1aceOhmh7GOzougfv1BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T03:06:17.202259Z"},"content_sha256":"82059a4fe7b03277d3f86fd56e37e51fbf649f28dacf9517180853718a6aa33c","schema_version":"1.0","event_id":"sha256:82059a4fe7b03277d3f86fd56e37e51fbf649f28dacf9517180853718a6aa33c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/THQGVAAPDHG5CA6NZU7TZXPMBI/bundle.json","state_url":"https://pith.science/pith/THQGVAAPDHG5CA6NZU7TZXPMBI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/THQGVAAPDHG5CA6NZU7TZXPMBI/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":"2026-05-28T03:06:17Z","links":{"resolver":"https://pith.science/pith/THQGVAAPDHG5CA6NZU7TZXPMBI","bundle":"https://pith.science/pith/THQGVAAPDHG5CA6NZU7TZXPMBI/bundle.json","state":"https://pith.science/pith/THQGVAAPDHG5CA6NZU7TZXPMBI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/THQGVAAPDHG5CA6NZU7TZXPMBI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:THQGVAAPDHG5CA6NZU7TZXPMBI","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":"b9689d55fab4129f5d91b61d5a57b996f32b4c9e56ec6e555ddbf44bef63d24e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-03-28T10:46:11Z","title_canon_sha256":"8d02a6ad9603e27e2edb07c02f80becd1ee464623c30ffc0be3cc113f89a1d4e"},"schema_version":"1.0","source":{"id":"1803.10518","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.10518","created_at":"2026-05-18T00:19:40Z"},{"alias_kind":"arxiv_version","alias_value":"1803.10518v2","created_at":"2026-05-18T00:19:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.10518","created_at":"2026-05-18T00:19:40Z"},{"alias_kind":"pith_short_12","alias_value":"THQGVAAPDHG5","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_16","alias_value":"THQGVAAPDHG5CA6N","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_8","alias_value":"THQGVAAP","created_at":"2026-05-18T12:32:53Z"}],"graph_snapshots":[{"event_id":"sha256:82059a4fe7b03277d3f86fd56e37e51fbf649f28dacf9517180853718a6aa33c","target":"graph","created_at":"2026-05-18T00:19:40Z","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 apply near-threshold laser photodetachment to characterize the rotational quantum level distribution of OH$^-$ ions stored in the cryogenic ion-beam storage ring, DESIREE, at Stockholm University. We find that the stored ions relax to a rotational temperature of 13.4$\\pm$0.2 K with 94.9$\\pm$0.3 % of the ions in the rotational ground state. This is consistent with the storage ring temperature of 13.5$\\pm$0.5 K as measured with eight silicon diodes, but in contrast to all earlier studies in cryogenic traps and rings where the rotational temperatures were always much higher than those of the s","authors_text":"A. K\\\"allberg, A. Simonsson, E. K. Anderson, G. Eklund, H. Cederquist, H. T. Schmidt, H. Zettergren, K. C. Chartkunchand, M. Gatchell, M. Kami\\'nska, M. K. Kristiansson, N. de Ruette, P. L\\\"ofgren, P. Reinhed, R. D. Thomas, S. Mannervik, S. Ros\\'en","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-03-28T10:46:11Z","title":"Rotationally cold OH$^-$ ions in the cryogenic electrostatic ion-beam storage ring DESIREE"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.10518","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":"sha256:26596246a1b0cff6ce8bee377e95cf339ad7b667135819548df01620c3560992","target":"record","created_at":"2026-05-18T00:19:40Z","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":"b9689d55fab4129f5d91b61d5a57b996f32b4c9e56ec6e555ddbf44bef63d24e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-03-28T10:46:11Z","title_canon_sha256":"8d02a6ad9603e27e2edb07c02f80becd1ee464623c30ffc0be3cc113f89a1d4e"},"schema_version":"1.0","source":{"id":"1803.10518","kind":"arxiv","version":2}},"canonical_sha256":"99e06a800f19cdd103cdcd3f3cddec0a2cffb63373fa439bdb24d7f7dc8aca1a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"99e06a800f19cdd103cdcd3f3cddec0a2cffb63373fa439bdb24d7f7dc8aca1a","first_computed_at":"2026-05-18T00:19:40.867119Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:19:40.867119Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vVO/FI7kZe/7P6qkutUPB2HUS03sBQIE2YTtEi7EQKcq+Uuv7dfGCJz1S6hJIaXGa/ZnIxv1XmSYxckowSnaDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:19:40.867621Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.10518","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:26596246a1b0cff6ce8bee377e95cf339ad7b667135819548df01620c3560992","sha256:82059a4fe7b03277d3f86fd56e37e51fbf649f28dacf9517180853718a6aa33c"],"state_sha256":"8522d3868bfd7e88f53237bafe700d201b83f4ac1dd42d5a80fd84d1e3cbe2d5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T24HVVjTIrsekDeBPr7zU898Nm2xc3ntE7obQ+23wbYYQvVEXxfsofQN4jQun/kW/e00c1gd2VXq8F5oNwM6DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T03:06:17.204303Z","bundle_sha256":"0ea68d2521f21ce7c4b79761e93e58b12a8fca6154e50632dfd312ef4fba1b05"}}