Skip to Main content Skip to Navigation
Journal articles

Halo Structure of the Island of Inversion Nucleus 31Ne

Abstract : The cross sections for single-neutron removal from the very neutron-rich nucleus 31Ne on Pb and C targets have been measured at 230 MeV=nucleon using the RIBF facility at RIKEN. The deduced large Coulomb breakup cross section of 540(70) mb is indicative of a soft E1 excitation. Comparison with direct-breakup model calculations suggests that the valence neutron of 31Ne occupies a low-‘ orbital (most probably 2p3=2) with a small separation energy (Sn & 0:8 MeV), instead of being predominantly in the 1f7=2 orbital as expected from the conventional shell ordering. These findings suggest that 31Ne is the heaviest halo system known.
Document type :
Journal articles
Complete list of metadata
Contributor : Sandrine Guesnon <>
Submitted on : Tuesday, January 5, 2010 - 1:12:41 PM
Last modification on : Tuesday, February 19, 2019 - 11:13:18 AM

Links full text



T. Nakamura, N. Kobayashi, Y. Kondo, Y. Satou, N. Aoi, et al.. Halo Structure of the Island of Inversion Nucleus 31Ne. Physical Review Letters, American Physical Society, 2009, 103, pp.262501. ⟨10.1103/PhysRevLett.103.262501⟩. ⟨in2p3-00443978⟩



Record views