Phys.Rev. C 105, 064605 (2022)

E.Yu.Nikolskii, I.A.Muzalevskii, A.A.Bezbakh, V.Chudoba, S.A.Krupko, S.G.Belogurov, D.Biare, A.S.Fomichev, E.M.Gazeeva, A.V.Gorshkov, L.V.Grigorenko, G.Kaminski, M.Khirk, O.Kiselev, D.A.Kostyleva, M.Yu.Kozlov, B.Mauyey, I.Mukha, Yu.L.Parfenova, W.Piatek, A.M.Quynh, V.N.Schetinin, A.Serikov, S.I.Sidorchuk, P.G.Sharov, N.B.Shulgina, R.S.Slepnev, S.V.Stepantsov, A.Swiercz, P.Szymkiewicz, G.M.Ter-Akopian, R.Wolski, B.Zalewski, M.V.Zhukov

⁶H states studied in the ²H(⁸He, ⁴He) reaction and evidence of an extremely correlated character of the ⁵H ground state

NUCLEAR REACTIONS ²H(⁸He, α)⁶H, E=26 MeV/nucleon, [secondary ⁸He beam produced in ⁹Be(¹¹B, X), E=33.4 MeV/nucleon reaction, fragments separated using ACCULINNA-2 separator at FLNR-JINR-Dubna facility]; measured reaction products, Eα, Iα, neutrons, α(³H)-coin, α(³H)n-coin, angular distributions and TOF using ΔE-E-E telescopes of CsI(Tl) scintillators, position-sensitive chambers, and a neutron wall of 48 stilbene-crystal modules; analyzed resonance energy profiles and the momentum distributions of fragments of the sequential ⁶H to ⁵H(g.s.)+n to ³H+3n decay by direct four-body-decay and sequential-emission mechanisms; deduced missing mass spectrum, evidence for dineutron correlations in the decay of ⁵H g.s. ⁶H; deduced broad resonant states, widths, decay modes of resonances, energy distributions of ³H fragments and neutrons emitted by ⁶H states, differential cross section, no evidence for a 2.6-2.9 MeV resonance reported earlier; discussed energy of the ground state of ⁶H with no definite conclusion. Monte Carlo simulations. ²H(¹⁰Be, α)⁸Li, E=42 MeV/nucleon; reaction used for calibration of ⁶H spectrum.

doi: 10.1103/PhysRevC.105.064605