Spectroscopy of 32Ne and the Island of Inversion

Abstract

We report on the first spectroscopic study of the N=22 nucleus 32Ne at the newly completed RIKEN Radioactive Ion Beam Factory. A single gamma-ray line with an energy of 722(9) keV was observed in both inelastic scattering of a 226 MeV/u 32Ne beam on a Carbon target and proton removal from 33Na at 245 MeV/u. This transition is assigned to the de-excitation of the first J^pi = 2+ state in 32Ne to the 0+ ground state. Interpreted through comparison with state-of-the-art shell model calculations, the low excitation energy demonstrates that the Island of Inversion extends to at least N=22 for the Ne isotopes.

Accepted for publication in Phys. Rev. Lett. 11 pages, 3 figures

References in corpus (2)

• Nuclear magic numbers: new features far from stability
• "Safe" Coulomb Excitation of 30Mg

Cited by in corpus (18)

• Identification of 45 New Neutron-Rich Isotopes Produced by In-Flight Fission of a 238U Beam at 345 MeV/nucleon
• Discovery of the shape coexisting 0+ state in 32Mg by a two neutron transfer reaction
• The Neutron-Rich Edge of the Nuclear Landscape. Experiment and Theory
• A two-neutron halo is unveiled in ${}^{29}$F
• Global optical potential for nucleus-nucleus systems from 50 MeV/u to 400 MeV/u
• Exploring the "Island of Inversion" by in-beam gamma-ray spectroscopy of the neutron-rich sodium isotopes 31,32,33Na
• Multiscale physics of atomic nuclei from first principles
• Microsecond Isomer at the N=20 Island of Shape Inversion Observed at FRIB
• Ground-state properties and symmetry energy of neutron-rich and neutron-deficient Mg isotopes
• Coulomb breakup of ${}^{37}$Mg and its ground state structure
• Spectroscopy of ${}^{33}$Mg with knockout reactions
• Exploring the structure of ${}^{29}$Ne
• Intruder configurations in ${}^{29}$Ne at the transition into the island of inversion: Detailed structure study of ${}^{28}$Ne
• Triaxial relativistic Hartree-Bogoliubov theory in continuum for exotic nuclei
• Border of the Island of Inversion: Unbound states in ${}^{29}$Ne
• Configuration interaction relativistic Hartree-Fock model
• Structure of odd-mass Ne, Na, and Mg nuclei
• Deformation, halo, and bubble structure: A paradigm shift of exotic phenomena in light to medium mass nuclei