{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:4HOPUKCYZ5LYA2H5VC6H4VI46D","short_pith_number":"pith:4HOPUKCY","canonical_record":{"source":{"id":"2009.07585","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2020-09-16T10:18:03Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"03fe6985f454c785f34549460d10ca65dc48f503b4ce9f5a6af107822aab40ec","abstract_canon_sha256":"c0f1ad8afb273a8e845bb699dc3e34d81ed9d3a16ebe19e6008a2bedcd9edf91"},"schema_version":"1.0"},"canonical_sha256":"e1dcfa2858cf578068fda8bc7e551cf0c1e72cb2182b31ed81196350831cb02c","source":{"kind":"arxiv","id":"2009.07585","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.07585","created_at":"2026-07-05T02:12:04Z"},{"alias_kind":"arxiv_version","alias_value":"2009.07585v1","created_at":"2026-07-05T02:12:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.07585","created_at":"2026-07-05T02:12:04Z"},{"alias_kind":"pith_short_12","alias_value":"4HOPUKCYZ5LY","created_at":"2026-07-05T02:12:04Z"},{"alias_kind":"pith_short_16","alias_value":"4HOPUKCYZ5LYA2H5","created_at":"2026-07-05T02:12:04Z"},{"alias_kind":"pith_short_8","alias_value":"4HOPUKCY","created_at":"2026-07-05T02:12:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:4HOPUKCYZ5LYA2H5VC6H4VI46D","target":"record","payload":{"canonical_record":{"source":{"id":"2009.07585","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2020-09-16T10:18:03Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"03fe6985f454c785f34549460d10ca65dc48f503b4ce9f5a6af107822aab40ec","abstract_canon_sha256":"c0f1ad8afb273a8e845bb699dc3e34d81ed9d3a16ebe19e6008a2bedcd9edf91"},"schema_version":"1.0"},"canonical_sha256":"e1dcfa2858cf578068fda8bc7e551cf0c1e72cb2182b31ed81196350831cb02c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:12:04.252328Z","signature_b64":"/ukmP3RJD42fZWybwwO7fofufS9iJu4QEKy4lMNN/7n5itj+OLOZG3oSN61VVln1eB3TVJc0q7/ikCFfvHdtBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e1dcfa2858cf578068fda8bc7e551cf0c1e72cb2182b31ed81196350831cb02c","last_reissued_at":"2026-07-05T02:12:04.251847Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:12:04.251847Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2009.07585","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":"2026-07-05T02:12:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Qirk85l9Y4DuthUK14fuFiG4JC/HQycPGX9sgSHCRihdbnn/Qh25ExsGP78gxHneW/3YZf9izbzmC6sj2xt9Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T13:48:07.721976Z"},"content_sha256":"e864be75340da217d1516a5087aa7b6b9c1e9f1b8e47096b092103fb59123e64","schema_version":"1.0","event_id":"sha256:e864be75340da217d1516a5087aa7b6b9c1e9f1b8e47096b092103fb59123e64"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:4HOPUKCYZ5LYA2H5VC6H4VI46D","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hydrogen reduction of enriched germanium dioxide and zone-refining for the LEGEND experiment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"physics.ins-det","authors_text":"(2) Physik Department, Jozsef Janicsk\\'o-Cs\\'athy (1), Kevin-Peter Gradwohl (1), Oskar Moras (2), R. Radhakrishnan Sumathi (1) ((1) Leibniz-Institut f\\\"ur Kristallz\\\"uchtung, Stefan Sch\\\"onert (2), Technische Universit\\\"at M\\\"unchen)","submitted_at":"2020-09-16T10:18:03Z","abstract_excerpt":"The LEGEND experiment, now under construction, will operate a large array of Ge detectors for the search of neutrinoless double-beta decay of $^{76}$Ge. In this paper we report on the process development for the hydrogen reduction of germanium dioxide enriched in $^{76}$Ge as part of the effort to manufacture detectors for the LEGEND experiment. The process was optimized via a kinetic un-reacted shrinking model and tested with a batch of natural GeO$_2$. We completed the reduction of a batch of 23 kg isotopically enriched Ge with an average yield of 99.85%. Subsequently, the Ge was purified to"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.07585","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/2009.07585/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":"2026-07-05T02:12:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"drYfatgiEkxBLYOkA5QzZ+JT6mfdu4IQpNNrIN58RJBs1U2QbDXyKrwCZDNaqQHXkBtS01ZGxKxc0Ru39kYaBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T13:48:07.722365Z"},"content_sha256":"ddc950d6b29667446a1af91d2302171915e717db8552662bca37545a49919249","schema_version":"1.0","event_id":"sha256:ddc950d6b29667446a1af91d2302171915e717db8552662bca37545a49919249"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4HOPUKCYZ5LYA2H5VC6H4VI46D/bundle.json","state_url":"https://pith.science/pith/4HOPUKCYZ5LYA2H5VC6H4VI46D/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4HOPUKCYZ5LYA2H5VC6H4VI46D/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":"2026-07-07T13:48:07Z","links":{"resolver":"https://pith.science/pith/4HOPUKCYZ5LYA2H5VC6H4VI46D","bundle":"https://pith.science/pith/4HOPUKCYZ5LYA2H5VC6H4VI46D/bundle.json","state":"https://pith.science/pith/4HOPUKCYZ5LYA2H5VC6H4VI46D/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4HOPUKCYZ5LYA2H5VC6H4VI46D/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:4HOPUKCYZ5LYA2H5VC6H4VI46D","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":"c0f1ad8afb273a8e845bb699dc3e34d81ed9d3a16ebe19e6008a2bedcd9edf91","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2020-09-16T10:18:03Z","title_canon_sha256":"03fe6985f454c785f34549460d10ca65dc48f503b4ce9f5a6af107822aab40ec"},"schema_version":"1.0","source":{"id":"2009.07585","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.07585","created_at":"2026-07-05T02:12:04Z"},{"alias_kind":"arxiv_version","alias_value":"2009.07585v1","created_at":"2026-07-05T02:12:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.07585","created_at":"2026-07-05T02:12:04Z"},{"alias_kind":"pith_short_12","alias_value":"4HOPUKCYZ5LY","created_at":"2026-07-05T02:12:04Z"},{"alias_kind":"pith_short_16","alias_value":"4HOPUKCYZ5LYA2H5","created_at":"2026-07-05T02:12:04Z"},{"alias_kind":"pith_short_8","alias_value":"4HOPUKCY","created_at":"2026-07-05T02:12:04Z"}],"graph_snapshots":[{"event_id":"sha256:ddc950d6b29667446a1af91d2302171915e717db8552662bca37545a49919249","target":"graph","created_at":"2026-07-05T02:12:04Z","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/2009.07585/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The LEGEND experiment, now under construction, will operate a large array of Ge detectors for the search of neutrinoless double-beta decay of $^{76}$Ge. In this paper we report on the process development for the hydrogen reduction of germanium dioxide enriched in $^{76}$Ge as part of the effort to manufacture detectors for the LEGEND experiment. The process was optimized via a kinetic un-reacted shrinking model and tested with a batch of natural GeO$_2$. We completed the reduction of a batch of 23 kg isotopically enriched Ge with an average yield of 99.85%. Subsequently, the Ge was purified to","authors_text":"(2) Physik Department, Jozsef Janicsk\\'o-Cs\\'athy (1), Kevin-Peter Gradwohl (1), Oskar Moras (2), R. Radhakrishnan Sumathi (1) ((1) Leibniz-Institut f\\\"ur Kristallz\\\"uchtung, Stefan Sch\\\"onert (2), Technische Universit\\\"at M\\\"unchen)","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2020-09-16T10:18:03Z","title":"Hydrogen reduction of enriched germanium dioxide and zone-refining for the LEGEND experiment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.07585","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:e864be75340da217d1516a5087aa7b6b9c1e9f1b8e47096b092103fb59123e64","target":"record","created_at":"2026-07-05T02:12:04Z","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":"c0f1ad8afb273a8e845bb699dc3e34d81ed9d3a16ebe19e6008a2bedcd9edf91","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2020-09-16T10:18:03Z","title_canon_sha256":"03fe6985f454c785f34549460d10ca65dc48f503b4ce9f5a6af107822aab40ec"},"schema_version":"1.0","source":{"id":"2009.07585","kind":"arxiv","version":1}},"canonical_sha256":"e1dcfa2858cf578068fda8bc7e551cf0c1e72cb2182b31ed81196350831cb02c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e1dcfa2858cf578068fda8bc7e551cf0c1e72cb2182b31ed81196350831cb02c","first_computed_at":"2026-07-05T02:12:04.251847Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:12:04.251847Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/ukmP3RJD42fZWybwwO7fofufS9iJu4QEKy4lMNN/7n5itj+OLOZG3oSN61VVln1eB3TVJc0q7/ikCFfvHdtBA==","signature_status":"signed_v1","signed_at":"2026-07-05T02:12:04.252328Z","signed_message":"canonical_sha256_bytes"},"source_id":"2009.07585","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e864be75340da217d1516a5087aa7b6b9c1e9f1b8e47096b092103fb59123e64","sha256:ddc950d6b29667446a1af91d2302171915e717db8552662bca37545a49919249"],"state_sha256":"6df84ec65eee39c82df1bd550c17dd63b7d1cb94546a2b20d26f597b61cd63b6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N4pXwOoj+uQ2NVgRq5eCmWDombwdAUfIUrsQs/eAjrtlyssGmjKDwpHZ5Cdr5sMhrTTfG+9MQks98f3kWORjCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T13:48:07.724344Z","bundle_sha256":"92fe12fa9aaa6d8d21347afbdfe580faec91ab0e410366fc3b111e54f2287860"}}