{"paper":{"title":"First measurement of the 2.4 and 2.9 MeV $^6$He three-cluster resonant states via the $^3$H($^4$He,p$\\alpha$)2n four-body reaction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Anastasi, F. Curciarello, G. Fazio, G. Giardina, G. Mandaglio, H. V. Mokhnach, O. K. Gorpinich, O. O.Jachmenjov, O. Ponkratenko, O. Povoroznyk, V. De Leo, Y. Roznyuk","submitted_at":"2014-05-06T11:07:24Z","abstract_excerpt":"Two new low-lying $^6$He levels at excitation energies of about 2.4 and 2.9 MeV were observed in the experimental investigation of the p-$\\alpha$ coincidence spectra obtained by the $^3$H($^4$He,p$\\alpha$)2n four-body reaction at $E_{\\rm \\,^4He}$ beam energy of 27.2 MeV. The relevant $E^*$ peak energy and $\\Gamma$ energy width spectroscopic parameters for such $^6$He$^*$ excited states decaying into the $\\alpha$+n+n channel were obtained by analyzing the bidimensional ($E_{\\rm p}$, $E_{\\rm \\alpha}$) energy spectra. The present new result of two low-lying $^6$He$^*$ excited states above the $^4"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1405.1226","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"}