Candidate Resonant Tetraneutron State Populated by the He4(He8,Be8) Reaction

Abstract : A candidate resonant tetraneutron state is found in the missing-mass spectrum obtained in the double-charge-exchange reaction He4(He8,Be8) at 186  MeV/u. The energy of the state is 0.83±0.65(stat)±1.25(syst)  MeV above the threshold of four-neutron decay with a significance level of 4.9σ. Utilizing the large positive Q value of the (He8,Be8) reaction, an almost recoilless condition of the four-neutron system was achieved so as to obtain a weakly interacting four-neutron system efficiently.
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Submitted on : Monday, April 11, 2016 - 5:42:54 PM
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K. Kisamori, S. Shimoura, H. Miya, S. Michimasa, S. Ota, et al.. Candidate Resonant Tetraneutron State Populated by the He4(He8,Be8) Reaction. Physical Review Letters, American Physical Society, 2016, 116 (5), pp.052501. ⟨10.1103/PhysRevLett.116.052501⟩. ⟨in2p3-01301202⟩

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