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Observation of a p-wave one-neutron halo configuration in 37Mg

Abstract : Cross sections of 1n-removal reactions from the neutron-rich nucleus Mg37 on C and Pb targets and the parallel momentum distributions of the Mg37 residues from the C target have been measured at 240 MeV/nucleon. A combined analysis of these distinct nuclear- and Coulomb-dominated reaction data shows that the Mg37 ground state has a small 1n separation energy of 0.22+0.12−0.09 MeV and an appreciable p-wave neutron single-particle strength. These results confirm that Mg37 lies near the edge of the "island of inversion" and has a sizable p-wave neutron halo component, the heaviest such system identified to date.
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Submitted on : Tuesday, July 22, 2014 - 10:26:16 AM
Last modification on : Tuesday, February 19, 2019 - 11:13:19 AM

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N. Kobayashi, T. Nakamura, Y. Kondo, J.A. Tostevin, Y. Utsuno, et al.. Observation of a p-wave one-neutron halo configuration in 37Mg. Physical Review Letters, American Physical Society, 2014, 112, pp.242501. ⟨10.1103/PhysRevLett.112.242501⟩. ⟨in2p3-01027507⟩

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