{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:W4ZZI3TV6MJYE6IP4BNOB4HDHQ","short_pith_number":"pith:W4ZZI3TV","canonical_record":{"source":{"id":"1809.02664","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2018-09-10T05:26:39Z","cross_cats_sorted":["hep-ex","physics.ins-det"],"title_canon_sha256":"8994c6aed43145866aa08e5e3db9082ae63eba70a327afa660117e5671c56327","abstract_canon_sha256":"586ee5dc2b761c874fc9693ab84252b253c2b7e78b6a316ac1e88cd24becf2dd"},"schema_version":"1.0"},"canonical_sha256":"b733946e75f31382790fe05ae0f0e33c2142deb889c6fad0545a6549bd785b6e","source":{"kind":"arxiv","id":"1809.02664","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.02664","created_at":"2026-05-18T00:06:15Z"},{"alias_kind":"arxiv_version","alias_value":"1809.02664v1","created_at":"2026-05-18T00:06:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.02664","created_at":"2026-05-18T00:06:15Z"},{"alias_kind":"pith_short_12","alias_value":"W4ZZI3TV6MJY","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"W4ZZI3TV6MJYE6IP","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"W4ZZI3TV","created_at":"2026-05-18T12:32:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:W4ZZI3TV6MJYE6IP4BNOB4HDHQ","target":"record","payload":{"canonical_record":{"source":{"id":"1809.02664","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2018-09-10T05:26:39Z","cross_cats_sorted":["hep-ex","physics.ins-det"],"title_canon_sha256":"8994c6aed43145866aa08e5e3db9082ae63eba70a327afa660117e5671c56327","abstract_canon_sha256":"586ee5dc2b761c874fc9693ab84252b253c2b7e78b6a316ac1e88cd24becf2dd"},"schema_version":"1.0"},"canonical_sha256":"b733946e75f31382790fe05ae0f0e33c2142deb889c6fad0545a6549bd785b6e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:06:15.662947Z","signature_b64":"a1UgWN33jVd0V+KbBE12c2bGbAR1g0lhUZnpRpP1wm/qbH7RbM1qq7z8fX0LXpnNkkxoRDxVmwO4P9nEtm/sAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b733946e75f31382790fe05ae0f0e33c2142deb889c6fad0545a6549bd785b6e","last_reissued_at":"2026-05-18T00:06:15.662397Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:06:15.662397Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1809.02664","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":"2026-05-18T00:06:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ew99LRKmD/rAliXBwwwPyRmpV5sLk0mBe9hOK8XN0eUUg2gHuj/9eAKJA3gzBgeJMV9TQ+x7/AVQqHXa6wHaAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T07:43:09.634502Z"},"content_sha256":"713b10affdb492bd66d5b01fad4d3f30fbb68aef35fe20116a56f8a232de85d3","schema_version":"1.0","event_id":"sha256:713b10affdb492bd66d5b01fad4d3f30fbb68aef35fe20116a56f8a232de85d3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:W4ZZI3TV6MJYE6IP4BNOB4HDHQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Gamma Ray Spectrum from Thermal Neutron Capture on Gadolinium-157","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","physics.ins-det"],"primary_cat":"nucl-ex","authors_text":"Ajmi Ali, Atsushi Kimura, Gianmaria Collazuol, Hideo Harada, Iwa Ou, Kaito Hagiwara, Makoto Sakuda, Mandeep Singh Reen, Michael Wurm, Michel Gonin, Nobuyuki Iwamoto, Pretam Kumar Das, Rohit Dir, Sebastian Lorenz, Shoji Nakamura, Takaaki Mori, Takashi Sudo, Takatomi Yano, Tomoyuki Tanaka, Tsubasa Kayano, William Focillon, Yoshiyuki Yamada, Yusuke Koshio","submitted_at":"2018-09-10T05:26:39Z","abstract_excerpt":"We have measured the $\\gamma$-ray energy spectrum from the thermal neutron capture, ${}^{157}$Gd$(n,\\gamma){}^{158}$Gd, on an enriched $^{157}$Gd target (Gd$_{2}$O$_{3}$) in the energy range from 0.11 MeV up to about 8 MeV. The target was placed inside the germanium spectrometer of the ANNRI detector at J-PARC and exposed to a neutron beam from the Japan Spallation Neutron Source (JSNS). Radioactive sources ($^{60}$Co, $^{137}$Cs, and $^{152}$Eu) and the reaction $^{35}$Cl($n$,$\\gamma$) were used to determine the spectrometer's detection efficiency for $\\gamma$ rays at energies from 0.3 to 8.5"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.02664","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":"2026-05-18T00:06:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jTTijVcO4bafA4SBDoP1VYwKCQVQELwT+4LRBCMo/XOFVg3HrRI/tR71fYsVSc05MdKGUx1aAgLzP0MaFmQYCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T07:43:09.634867Z"},"content_sha256":"54ae614c55780de5594b98c41bc720947d7738f6f243c78f292ed4cc3fd1e148","schema_version":"1.0","event_id":"sha256:54ae614c55780de5594b98c41bc720947d7738f6f243c78f292ed4cc3fd1e148"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/W4ZZI3TV6MJYE6IP4BNOB4HDHQ/bundle.json","state_url":"https://pith.science/pith/W4ZZI3TV6MJYE6IP4BNOB4HDHQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/W4ZZI3TV6MJYE6IP4BNOB4HDHQ/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":"2026-05-31T07:43:09Z","links":{"resolver":"https://pith.science/pith/W4ZZI3TV6MJYE6IP4BNOB4HDHQ","bundle":"https://pith.science/pith/W4ZZI3TV6MJYE6IP4BNOB4HDHQ/bundle.json","state":"https://pith.science/pith/W4ZZI3TV6MJYE6IP4BNOB4HDHQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/W4ZZI3TV6MJYE6IP4BNOB4HDHQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:W4ZZI3TV6MJYE6IP4BNOB4HDHQ","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":"586ee5dc2b761c874fc9693ab84252b253c2b7e78b6a316ac1e88cd24becf2dd","cross_cats_sorted":["hep-ex","physics.ins-det"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2018-09-10T05:26:39Z","title_canon_sha256":"8994c6aed43145866aa08e5e3db9082ae63eba70a327afa660117e5671c56327"},"schema_version":"1.0","source":{"id":"1809.02664","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.02664","created_at":"2026-05-18T00:06:15Z"},{"alias_kind":"arxiv_version","alias_value":"1809.02664v1","created_at":"2026-05-18T00:06:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.02664","created_at":"2026-05-18T00:06:15Z"},{"alias_kind":"pith_short_12","alias_value":"W4ZZI3TV6MJY","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"W4ZZI3TV6MJYE6IP","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"W4ZZI3TV","created_at":"2026-05-18T12:32:59Z"}],"graph_snapshots":[{"event_id":"sha256:54ae614c55780de5594b98c41bc720947d7738f6f243c78f292ed4cc3fd1e148","target":"graph","created_at":"2026-05-18T00:06:15Z","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 have measured the $\\gamma$-ray energy spectrum from the thermal neutron capture, ${}^{157}$Gd$(n,\\gamma){}^{158}$Gd, on an enriched $^{157}$Gd target (Gd$_{2}$O$_{3}$) in the energy range from 0.11 MeV up to about 8 MeV. The target was placed inside the germanium spectrometer of the ANNRI detector at J-PARC and exposed to a neutron beam from the Japan Spallation Neutron Source (JSNS). Radioactive sources ($^{60}$Co, $^{137}$Cs, and $^{152}$Eu) and the reaction $^{35}$Cl($n$,$\\gamma$) were used to determine the spectrometer's detection efficiency for $\\gamma$ rays at energies from 0.3 to 8.5","authors_text":"Ajmi Ali, Atsushi Kimura, Gianmaria Collazuol, Hideo Harada, Iwa Ou, Kaito Hagiwara, Makoto Sakuda, Mandeep Singh Reen, Michael Wurm, Michel Gonin, Nobuyuki Iwamoto, Pretam Kumar Das, Rohit Dir, Sebastian Lorenz, Shoji Nakamura, Takaaki Mori, Takashi Sudo, Takatomi Yano, Tomoyuki Tanaka, Tsubasa Kayano, William Focillon, Yoshiyuki Yamada, Yusuke Koshio","cross_cats":["hep-ex","physics.ins-det"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2018-09-10T05:26:39Z","title":"Gamma Ray Spectrum from Thermal Neutron Capture on Gadolinium-157"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.02664","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":"sha256:713b10affdb492bd66d5b01fad4d3f30fbb68aef35fe20116a56f8a232de85d3","target":"record","created_at":"2026-05-18T00:06:15Z","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":"586ee5dc2b761c874fc9693ab84252b253c2b7e78b6a316ac1e88cd24becf2dd","cross_cats_sorted":["hep-ex","physics.ins-det"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2018-09-10T05:26:39Z","title_canon_sha256":"8994c6aed43145866aa08e5e3db9082ae63eba70a327afa660117e5671c56327"},"schema_version":"1.0","source":{"id":"1809.02664","kind":"arxiv","version":1}},"canonical_sha256":"b733946e75f31382790fe05ae0f0e33c2142deb889c6fad0545a6549bd785b6e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b733946e75f31382790fe05ae0f0e33c2142deb889c6fad0545a6549bd785b6e","first_computed_at":"2026-05-18T00:06:15.662397Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:06:15.662397Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"a1UgWN33jVd0V+KbBE12c2bGbAR1g0lhUZnpRpP1wm/qbH7RbM1qq7z8fX0LXpnNkkxoRDxVmwO4P9nEtm/sAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:06:15.662947Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.02664","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:713b10affdb492bd66d5b01fad4d3f30fbb68aef35fe20116a56f8a232de85d3","sha256:54ae614c55780de5594b98c41bc720947d7738f6f243c78f292ed4cc3fd1e148"],"state_sha256":"90d188e409b3def49bf3bd75d7082c50f3b48088f486d0abea26fa0282cd2aea"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pJLbLtLEqHchaXgeWFM6iuc9pJOhfwDF5A2hUI6nsY1aTbQZwafJ1u0cpOp7OQfz1i1E3DpZQtLVPpPOuhWXBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T07:43:09.638068Z","bundle_sha256":"b1cd927b6e689f2f66712b4c11f8074ae2d28f41f65af5329896ea758cdd34e1"}}