{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:E7DDBN5IBYFTX3W6ODPCDJN2LQ","short_pith_number":"pith:E7DDBN5I","canonical_record":{"source":{"id":"1805.00797","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atm-clus","submitted_at":"2018-05-02T13:34:47Z","cross_cats_sorted":[],"title_canon_sha256":"f7eef8017bbcd9099de1f9d1d9bf84dfade56d2ca6a4675a2f80fdd15bef61bf","abstract_canon_sha256":"0a3cd683db35b9f9c5c409611ab6e2076693863ffe7ba6b63fc5e00f6ee3e21b"},"schema_version":"1.0"},"canonical_sha256":"27c630b7a80e0b3beede70de21a5ba5c3c92bf78bfc9ed2799c5ebd271e857f5","source":{"kind":"arxiv","id":"1805.00797","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.00797","created_at":"2026-05-18T00:16:57Z"},{"alias_kind":"arxiv_version","alias_value":"1805.00797v1","created_at":"2026-05-18T00:16:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.00797","created_at":"2026-05-18T00:16:57Z"},{"alias_kind":"pith_short_12","alias_value":"E7DDBN5IBYFT","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_16","alias_value":"E7DDBN5IBYFTX3W6","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_8","alias_value":"E7DDBN5I","created_at":"2026-05-18T12:32:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:E7DDBN5IBYFTX3W6ODPCDJN2LQ","target":"record","payload":{"canonical_record":{"source":{"id":"1805.00797","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atm-clus","submitted_at":"2018-05-02T13:34:47Z","cross_cats_sorted":[],"title_canon_sha256":"f7eef8017bbcd9099de1f9d1d9bf84dfade56d2ca6a4675a2f80fdd15bef61bf","abstract_canon_sha256":"0a3cd683db35b9f9c5c409611ab6e2076693863ffe7ba6b63fc5e00f6ee3e21b"},"schema_version":"1.0"},"canonical_sha256":"27c630b7a80e0b3beede70de21a5ba5c3c92bf78bfc9ed2799c5ebd271e857f5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:16:57.693982Z","signature_b64":"5xZh+c50wBDHDu4pmaBy1BhzFC07eygeNkuys9douPDC7P/k5hy1qbRRKo6dU46ws+FBNBtKuOUT3f7ApBLdBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"27c630b7a80e0b3beede70de21a5ba5c3c92bf78bfc9ed2799c5ebd271e857f5","last_reissued_at":"2026-05-18T00:16:57.693267Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:16:57.693267Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.00797","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":"2026-05-18T00:16:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RmpRDQarbKy/xkrB2jm+jeQfprQcjUbtfpRL2R1KUspem5ztvOxM9vwgHBXuZd/Gb0NU4ffRzG77e2mrI31iBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T04:14:15.187446Z"},"content_sha256":"438771c3222794dee04d79cefba318f8bc01ff985409128f8a16cd93aff48b2c","schema_version":"1.0","event_id":"sha256:438771c3222794dee04d79cefba318f8bc01ff985409128f8a16cd93aff48b2c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:E7DDBN5IBYFTX3W6ODPCDJN2LQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Electron-induced chemistry in imidazole clusters embedded in helium nanodroplets","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.atm-clus","authors_text":"J. Postler, L. Feketeov\\'a, M. Goulart, M. Kuhn, M. Mahmoodi Darian, N. Gitzl, P. Martini, P. Scheier, S. Raggl","submitted_at":"2018-05-02T13:34:47Z","abstract_excerpt":"Electron-induced chemistry in imidazole (IMI) clusters embedded in helium nanodroplets (with an average size of 2$\\times$10$^5$ He atoms) has been investigated with high-resoluton time-of-flight mass spectrometry. The formation of both, negative and positive, ions was monitored as a function of the cluster size n. In both ion spectra a clear series of peaks with IMI cluster sizes up to at least 25 are observed. While the anions are formed by collisions of IMI$_n$ with He$^\\star$$^{-}$, the cations are formed through ionization of IMI$_n$ by He$^{+}$ as the measured onset for the cation formati"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.00797","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":"2026-05-18T00:16:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ym5m0j4UDuov/qPe0e1KeTsOxDYu2ThC5J0LBS/Y34O3NPylJfz7eesusaJWFxHgHgndlIc8RvPNaJW+zF7tBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T04:14:15.187810Z"},"content_sha256":"d8824939029bfcb1208d78a9f64b502fba03ac09115c4fd7923f8f14f01200e4","schema_version":"1.0","event_id":"sha256:d8824939029bfcb1208d78a9f64b502fba03ac09115c4fd7923f8f14f01200e4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/E7DDBN5IBYFTX3W6ODPCDJN2LQ/bundle.json","state_url":"https://pith.science/pith/E7DDBN5IBYFTX3W6ODPCDJN2LQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/E7DDBN5IBYFTX3W6ODPCDJN2LQ/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":"2026-05-25T04:14:15Z","links":{"resolver":"https://pith.science/pith/E7DDBN5IBYFTX3W6ODPCDJN2LQ","bundle":"https://pith.science/pith/E7DDBN5IBYFTX3W6ODPCDJN2LQ/bundle.json","state":"https://pith.science/pith/E7DDBN5IBYFTX3W6ODPCDJN2LQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/E7DDBN5IBYFTX3W6ODPCDJN2LQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:E7DDBN5IBYFTX3W6ODPCDJN2LQ","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":"0a3cd683db35b9f9c5c409611ab6e2076693863ffe7ba6b63fc5e00f6ee3e21b","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atm-clus","submitted_at":"2018-05-02T13:34:47Z","title_canon_sha256":"f7eef8017bbcd9099de1f9d1d9bf84dfade56d2ca6a4675a2f80fdd15bef61bf"},"schema_version":"1.0","source":{"id":"1805.00797","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.00797","created_at":"2026-05-18T00:16:57Z"},{"alias_kind":"arxiv_version","alias_value":"1805.00797v1","created_at":"2026-05-18T00:16:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.00797","created_at":"2026-05-18T00:16:57Z"},{"alias_kind":"pith_short_12","alias_value":"E7DDBN5IBYFT","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_16","alias_value":"E7DDBN5IBYFTX3W6","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_8","alias_value":"E7DDBN5I","created_at":"2026-05-18T12:32:22Z"}],"graph_snapshots":[{"event_id":"sha256:d8824939029bfcb1208d78a9f64b502fba03ac09115c4fd7923f8f14f01200e4","target":"graph","created_at":"2026-05-18T00:16:57Z","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":"Electron-induced chemistry in imidazole (IMI) clusters embedded in helium nanodroplets (with an average size of 2$\\times$10$^5$ He atoms) has been investigated with high-resoluton time-of-flight mass spectrometry. The formation of both, negative and positive, ions was monitored as a function of the cluster size n. In both ion spectra a clear series of peaks with IMI cluster sizes up to at least 25 are observed. While the anions are formed by collisions of IMI$_n$ with He$^\\star$$^{-}$, the cations are formed through ionization of IMI$_n$ by He$^{+}$ as the measured onset for the cation formati","authors_text":"J. Postler, L. Feketeov\\'a, M. Goulart, M. Kuhn, M. Mahmoodi Darian, N. Gitzl, P. Martini, P. Scheier, S. Raggl","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atm-clus","submitted_at":"2018-05-02T13:34:47Z","title":"Electron-induced chemistry in imidazole clusters embedded in helium nanodroplets"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.00797","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":"sha256:438771c3222794dee04d79cefba318f8bc01ff985409128f8a16cd93aff48b2c","target":"record","created_at":"2026-05-18T00:16:57Z","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":"0a3cd683db35b9f9c5c409611ab6e2076693863ffe7ba6b63fc5e00f6ee3e21b","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atm-clus","submitted_at":"2018-05-02T13:34:47Z","title_canon_sha256":"f7eef8017bbcd9099de1f9d1d9bf84dfade56d2ca6a4675a2f80fdd15bef61bf"},"schema_version":"1.0","source":{"id":"1805.00797","kind":"arxiv","version":1}},"canonical_sha256":"27c630b7a80e0b3beede70de21a5ba5c3c92bf78bfc9ed2799c5ebd271e857f5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"27c630b7a80e0b3beede70de21a5ba5c3c92bf78bfc9ed2799c5ebd271e857f5","first_computed_at":"2026-05-18T00:16:57.693267Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:16:57.693267Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5xZh+c50wBDHDu4pmaBy1BhzFC07eygeNkuys9douPDC7P/k5hy1qbRRKo6dU46ws+FBNBtKuOUT3f7ApBLdBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:16:57.693982Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.00797","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:438771c3222794dee04d79cefba318f8bc01ff985409128f8a16cd93aff48b2c","sha256:d8824939029bfcb1208d78a9f64b502fba03ac09115c4fd7923f8f14f01200e4"],"state_sha256":"fb54d3ed4876ac67742506e31a7135f9637645f1c5a9303e76d921efe2b1c53a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eIcYViCiX6WoZHk9y/CfIKC2jobFVBZ+By11diXDVl3+dRmDFvvyn6fPj4Jwgmb8jHJSwRrYamywml5BycfyCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T04:14:15.190825Z","bundle_sha256":"7416d5c490ae643d3d1dcee55ddd98819a8504e6b627790a7d94b4d56ccc547a"}}