{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:JVOWZMFW2C5SJ7J6P4KMWVFWKM","short_pith_number":"pith:JVOWZMFW","schema_version":"1.0","canonical_sha256":"4d5d6cb0b6d0bb24fd3e7f14cb54b653346bb085aa2fc23c085ecd653a6865b2","source":{"kind":"arxiv","id":"1901.09707","version":1},"attestation_state":"computed","paper":{"title":"Neutron skin and signature of the $N$ = 14 shell gap found from measured proton radii of $^{17-22}$N","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-th"],"primary_cat":"nucl-ex","authors_text":"A. Estrad\\'e, A. Evdokimov, A. Prochazka, B. Sitar, C. Nociforo, C. Scheidenberger, D. Cortina-Gil, F. Ameil, F. Farinon, G. Guastalla, G. Hagen, H. Geissel, H. J. Ong, H. Weick, I. Dillmann, I. Mukha, I. Tanihata, J. Atkinson, J. Kurcewicz, J. S. Winfield, J. Tanaka, J. Vargas, M. Marta, M. Mostazo, M. Takechi, P. Strmen, R. Janik, R. Kanungo, R. Knobel, S. Bagchi, S. Kaur, S. Pietri, S. R. Stroberg, S. Terashima, T. D. Morris, T. Suzuki, W. Horiuchi, Y. Ayyad, Y. Tanaka, Yu. A. Litvinov","submitted_at":"2019-01-28T14:51:00Z","abstract_excerpt":"A thick neutron skin emerges from the first determination of root mean square radii of the proton distributions for $^{17-22}$N from charge changing cross section measurements around 900$A$ MeV at GSI. Neutron halo effects are signaled for $^{22}$N from an increase in the proton and matter radii. The radii suggest an unconventional shell gap at $N$ = 14 arising from the attractive proton-neutron tensor interaction, in good agreement with shell model calculations. $Ab$ $initio$, in-medium similarity re-normalization group, calculations with a state-of-the-art chiral nucleon-nucleon and three-nu"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1901.09707","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2019-01-28T14:51:00Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"760967fe2a280b04de8ee6efd46f6e0091b61a02b0ffc201f61c806b234be78e","abstract_canon_sha256":"cbe1c05d1dc1514c48b61677c2812fc309cec61250e14ff12c4e1f610ebc2a62"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:55:24.026251Z","signature_b64":"TvXocTtyMiyd+STbpD7oK/SUwD7DX8V59s/x518vvn+xuaVdFC7ChZWEYGkLWw/K1JmHXjQwfFTKuUmq/cvPAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4d5d6cb0b6d0bb24fd3e7f14cb54b653346bb085aa2fc23c085ecd653a6865b2","last_reissued_at":"2026-05-17T23:55:24.025647Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:55:24.025647Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Neutron skin and signature of the $N$ = 14 shell gap found from measured proton radii of $^{17-22}$N","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-th"],"primary_cat":"nucl-ex","authors_text":"A. Estrad\\'e, A. Evdokimov, A. Prochazka, B. Sitar, C. Nociforo, C. Scheidenberger, D. Cortina-Gil, F. Ameil, F. Farinon, G. Guastalla, G. Hagen, H. Geissel, H. J. Ong, H. Weick, I. Dillmann, I. Mukha, I. Tanihata, J. Atkinson, J. Kurcewicz, J. S. Winfield, J. Tanaka, J. Vargas, M. Marta, M. Mostazo, M. Takechi, P. Strmen, R. Janik, R. Kanungo, R. Knobel, S. Bagchi, S. Kaur, S. Pietri, S. R. Stroberg, S. Terashima, T. D. Morris, T. Suzuki, W. Horiuchi, Y. Ayyad, Y. Tanaka, Yu. A. Litvinov","submitted_at":"2019-01-28T14:51:00Z","abstract_excerpt":"A thick neutron skin emerges from the first determination of root mean square radii of the proton distributions for $^{17-22}$N from charge changing cross section measurements around 900$A$ MeV at GSI. Neutron halo effects are signaled for $^{22}$N from an increase in the proton and matter radii. The radii suggest an unconventional shell gap at $N$ = 14 arising from the attractive proton-neutron tensor interaction, in good agreement with shell model calculations. $Ab$ $initio$, in-medium similarity re-normalization group, calculations with a state-of-the-art chiral nucleon-nucleon and three-nu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.09707","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1901.09707","created_at":"2026-05-17T23:55:24.025732+00:00"},{"alias_kind":"arxiv_version","alias_value":"1901.09707v1","created_at":"2026-05-17T23:55:24.025732+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.09707","created_at":"2026-05-17T23:55:24.025732+00:00"},{"alias_kind":"pith_short_12","alias_value":"JVOWZMFW2C5S","created_at":"2026-05-18T12:33:21.387695+00:00"},{"alias_kind":"pith_short_16","alias_value":"JVOWZMFW2C5SJ7J6","created_at":"2026-05-18T12:33:21.387695+00:00"},{"alias_kind":"pith_short_8","alias_value":"JVOWZMFW","created_at":"2026-05-18T12:33:21.387695+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/JVOWZMFW2C5SJ7J6P4KMWVFWKM","json":"https://pith.science/pith/JVOWZMFW2C5SJ7J6P4KMWVFWKM.json","graph_json":"https://pith.science/api/pith-number/JVOWZMFW2C5SJ7J6P4KMWVFWKM/graph.json","events_json":"https://pith.science/api/pith-number/JVOWZMFW2C5SJ7J6P4KMWVFWKM/events.json","paper":"https://pith.science/paper/JVOWZMFW"},"agent_actions":{"view_html":"https://pith.science/pith/JVOWZMFW2C5SJ7J6P4KMWVFWKM","download_json":"https://pith.science/pith/JVOWZMFW2C5SJ7J6P4KMWVFWKM.json","view_paper":"https://pith.science/paper/JVOWZMFW","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1901.09707&json=true","fetch_graph":"https://pith.science/api/pith-number/JVOWZMFW2C5SJ7J6P4KMWVFWKM/graph.json","fetch_events":"https://pith.science/api/pith-number/JVOWZMFW2C5SJ7J6P4KMWVFWKM/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/JVOWZMFW2C5SJ7J6P4KMWVFWKM/action/timestamp_anchor","attest_storage":"https://pith.science/pith/JVOWZMFW2C5SJ7J6P4KMWVFWKM/action/storage_attestation","attest_author":"https://pith.science/pith/JVOWZMFW2C5SJ7J6P4KMWVFWKM/action/author_attestation","sign_citation":"https://pith.science/pith/JVOWZMFW2C5SJ7J6P4KMWVFWKM/action/citation_signature","submit_replication":"https://pith.science/pith/JVOWZMFW2C5SJ7J6P4KMWVFWKM/action/replication_record"}},"created_at":"2026-05-17T23:55:24.025732+00:00","updated_at":"2026-05-17T23:55:24.025732+00:00"}