{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:524YLEVR7JADZAQ2HB62CK2JFW","short_pith_number":"pith:524YLEVR","canonical_record":{"source":{"id":"1605.03287","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2016-05-11T05:31:36Z","cross_cats_sorted":[],"title_canon_sha256":"7988c191b12c85426578e85bd06cdc8daaa7c050142715e2dd499570d6db638b","abstract_canon_sha256":"bc39fe44465d0dc1e574d1c25d438dd4c6c3017314e3217827c02dba5fce2a77"},"schema_version":"1.0"},"canonical_sha256":"eeb98592b1fa403c821a387da12b492da16adc60d10fd78feffec8d626116863","source":{"kind":"arxiv","id":"1605.03287","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.03287","created_at":"2026-05-18T01:12:11Z"},{"alias_kind":"arxiv_version","alias_value":"1605.03287v1","created_at":"2026-05-18T01:12:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.03287","created_at":"2026-05-18T01:12:11Z"},{"alias_kind":"pith_short_12","alias_value":"524YLEVR7JAD","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_16","alias_value":"524YLEVR7JADZAQ2","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_8","alias_value":"524YLEVR","created_at":"2026-05-18T12:29:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:524YLEVR7JADZAQ2HB62CK2JFW","target":"record","payload":{"canonical_record":{"source":{"id":"1605.03287","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2016-05-11T05:31:36Z","cross_cats_sorted":[],"title_canon_sha256":"7988c191b12c85426578e85bd06cdc8daaa7c050142715e2dd499570d6db638b","abstract_canon_sha256":"bc39fe44465d0dc1e574d1c25d438dd4c6c3017314e3217827c02dba5fce2a77"},"schema_version":"1.0"},"canonical_sha256":"eeb98592b1fa403c821a387da12b492da16adc60d10fd78feffec8d626116863","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:12:11.572123Z","signature_b64":"szdT9MX6Dn06rVJVfvriseAYVMGZnfBY+UR+cFSKWRusA/2DxtN+QmT6hvjN6RI/6ieSa9WLVwYKGvwFohZFBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eeb98592b1fa403c821a387da12b492da16adc60d10fd78feffec8d626116863","last_reissued_at":"2026-05-18T01:12:11.571686Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:12:11.571686Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1605.03287","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":"2026-05-18T01:12:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3vuufMOV+ZZ4X9CZulyLTRFLKdzqSKLEXeOtgJNKpE27t6cbmPusLHrBgKCp7vI9O+sawETyEbAktX6up/zlBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T07:52:26.450051Z"},"content_sha256":"dba1f9330ba71526fb601603eafd58122366f20aff6dd5d38d172a60b18d8d81","schema_version":"1.0","event_id":"sha256:dba1f9330ba71526fb601603eafd58122366f20aff6dd5d38d172a60b18d8d81"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:524YLEVR7JADZAQ2HB62CK2JFW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A search for the radiative neutrinoless double electron capture of $^{58}$Ni","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Frotscher, B. Lehnert, D. Degering, K. Zuber, T. Michel","submitted_at":"2016-05-11T05:31:36Z","abstract_excerpt":"A search for the radiative neutrinoless double electron capture with single \\gray\\ emission has been performed in $^{58}$Ni. Gamma radiation from a 7286 g nickel sample in natural isotope composition was measured for 58.3 d with an ultra low background HPGe detector in the Felsenkeller underground laboratory in Dresden, Germany. A new lower half-life limit of $2.1 \\times 10^{21}$ yr (90% CL) was obtained for this decay mode. This half-life limit is two orders of magnitude higher than the existing limit for $^{58}$Ni and among the best half-life limits for neutrinoless double electron capture d"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.03287","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":""},"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":"2026-05-18T01:12:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mhyizhndT6zuh/iOtIE/Kzr01j2v9zkYCk41fx9Am9HRkc6TqzjNT3ER8sc1Q6oL4icrAybBFQAo2JS4XaRnCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T07:52:26.450492Z"},"content_sha256":"a19a78ef4e89e37739be262eda6f0393c8b687c19c61cf365ff5df169c526c26","schema_version":"1.0","event_id":"sha256:a19a78ef4e89e37739be262eda6f0393c8b687c19c61cf365ff5df169c526c26"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/524YLEVR7JADZAQ2HB62CK2JFW/bundle.json","state_url":"https://pith.science/pith/524YLEVR7JADZAQ2HB62CK2JFW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/524YLEVR7JADZAQ2HB62CK2JFW/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":"2026-05-27T07:52:26Z","links":{"resolver":"https://pith.science/pith/524YLEVR7JADZAQ2HB62CK2JFW","bundle":"https://pith.science/pith/524YLEVR7JADZAQ2HB62CK2JFW/bundle.json","state":"https://pith.science/pith/524YLEVR7JADZAQ2HB62CK2JFW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/524YLEVR7JADZAQ2HB62CK2JFW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:524YLEVR7JADZAQ2HB62CK2JFW","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":"bc39fe44465d0dc1e574d1c25d438dd4c6c3017314e3217827c02dba5fce2a77","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2016-05-11T05:31:36Z","title_canon_sha256":"7988c191b12c85426578e85bd06cdc8daaa7c050142715e2dd499570d6db638b"},"schema_version":"1.0","source":{"id":"1605.03287","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.03287","created_at":"2026-05-18T01:12:11Z"},{"alias_kind":"arxiv_version","alias_value":"1605.03287v1","created_at":"2026-05-18T01:12:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.03287","created_at":"2026-05-18T01:12:11Z"},{"alias_kind":"pith_short_12","alias_value":"524YLEVR7JAD","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_16","alias_value":"524YLEVR7JADZAQ2","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_8","alias_value":"524YLEVR","created_at":"2026-05-18T12:29:58Z"}],"graph_snapshots":[{"event_id":"sha256:a19a78ef4e89e37739be262eda6f0393c8b687c19c61cf365ff5df169c526c26","target":"graph","created_at":"2026-05-18T01:12:11Z","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":"A search for the radiative neutrinoless double electron capture with single \\gray\\ emission has been performed in $^{58}$Ni. Gamma radiation from a 7286 g nickel sample in natural isotope composition was measured for 58.3 d with an ultra low background HPGe detector in the Felsenkeller underground laboratory in Dresden, Germany. A new lower half-life limit of $2.1 \\times 10^{21}$ yr (90% CL) was obtained for this decay mode. This half-life limit is two orders of magnitude higher than the existing limit for $^{58}$Ni and among the best half-life limits for neutrinoless double electron capture d","authors_text":"A. Frotscher, B. Lehnert, D. Degering, K. Zuber, T. Michel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2016-05-11T05:31:36Z","title":"A search for the radiative neutrinoless double electron capture of $^{58}$Ni"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.03287","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:dba1f9330ba71526fb601603eafd58122366f20aff6dd5d38d172a60b18d8d81","target":"record","created_at":"2026-05-18T01:12:11Z","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":"bc39fe44465d0dc1e574d1c25d438dd4c6c3017314e3217827c02dba5fce2a77","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2016-05-11T05:31:36Z","title_canon_sha256":"7988c191b12c85426578e85bd06cdc8daaa7c050142715e2dd499570d6db638b"},"schema_version":"1.0","source":{"id":"1605.03287","kind":"arxiv","version":1}},"canonical_sha256":"eeb98592b1fa403c821a387da12b492da16adc60d10fd78feffec8d626116863","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eeb98592b1fa403c821a387da12b492da16adc60d10fd78feffec8d626116863","first_computed_at":"2026-05-18T01:12:11.571686Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:12:11.571686Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"szdT9MX6Dn06rVJVfvriseAYVMGZnfBY+UR+cFSKWRusA/2DxtN+QmT6hvjN6RI/6ieSa9WLVwYKGvwFohZFBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:12:11.572123Z","signed_message":"canonical_sha256_bytes"},"source_id":"1605.03287","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dba1f9330ba71526fb601603eafd58122366f20aff6dd5d38d172a60b18d8d81","sha256:a19a78ef4e89e37739be262eda6f0393c8b687c19c61cf365ff5df169c526c26"],"state_sha256":"0c793af55de26a966ca5c92f15e23cc7311916f415ae844e0e7cdfe7b2739308"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KK5PV3ieZjkZXLEzxrm0xa3WHkiVE9FnZkwCmi76elTldyLoryFhSq89cMTfmxCpQXUc3jhZo9bI1n+c0jBmDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T07:52:26.453197Z","bundle_sha256":"5f33fa6225763c5c24f33678c662e27ce1afca3525a8d5f75521d975d5457bfd"}}