{"paper":{"title":"Observation of the $^7$H excited state","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A.A. Bezbakh, A.M. Quynh, A. Serikov, A.S. Fomichev, A. Swiercz, A.V. Gorshkov, B. Mauyey, B. Zalewski, D.A. Kostyleva, D. Biare, E.M. Gazeeva, E.Yu. Nikolskii, G. Kaminski, G.M. Ter-Akopian, I.A. Muzalevskii, I. Mukha, L.V. Grigorenko, M.V. Zhukov, M.Yu. Kozlov, O. Kiselev, P.G. Sharov, P. Szymkiewicz, R.S. Slepnev, R. Wolski, S.A. Krupko, S.G. Belogurov, S.I. Sidorchuk, S.V. Stepantsov, V. Chudoba, V.N. Schetinin, W. Piatek, Yu.L. Parfenova","submitted_at":"2019-06-18T21:36:19Z","abstract_excerpt":"The $^7$H system was populated in the $^2$H($^8$He,$^3$He)$^7$H reaction with a 26 AMeV $^8$He beam. The $^{7}$H missing mass energy spectrum, the $^{3}$H energy and angular distributions in the $^7$H decay frame were reconstructed. The $^7$H missing mass spectrum shows a peak which can be interpreted either as unresolved $5/2^+$ and $3/2^+$ doublet or one of these states at 6.5(5) MeV. The data also provide indications on the $1/2^+$ ground state of $^7$H located at 2.0(5) MeV with quite a low population cross section of $\\sim 10$ $\\mu$b/sr within angular range $\\theta_{\\text{cm}} \\simeq 6^{\\"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.07818","kind":"arxiv","version":2},"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/1906.07818/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"}