Phys.Rev. C 104, 034313 (2021)

D.Chrisman, A.N.Kuchera, T.Baumann, A.Blake, B.A.Brown, J.Brown, C.Cochran, P.A.DeYoung, J.E.Finck, N.Frank, P.Gueye, H.Karrick, H.Liu, J.McDonaugh, T.Mix, B.Monteagudo, T.H.Redpath, W.F.Rogers, R.Seaton-Todd, A.Spyrou, K.Stiefel, M.Thoennessen, J.A.Tostevin, D.Votaw

Neutron-unbound states in ³¹Ne

NUCLEAR REACTIONS ⁹Be(³³Mg, X)³¹Ne, E=89 MeV/nucleon; measured reaction fragments and neutrons detected by the MoNa-LISA-Sweeper array at NSCL-MSU cyclotron facility; reconstructed decay energy for ³⁰Ne+n from invariant mass spectroscopy. ³¹Ne; deduced levels, neutron-unbound states from the two-body decay-energy spectrum. Comparison with shell-model calculations using FSU interaction within the NUSHELLX code, combined with two-proton knockout cross-section calculations using the eikonal reaction theory. Relevance to ³¹Ne being a prime example of a halo nucleus in the island of inversion.

doi: 10.1103/PhysRevC.104.034313