Breakup reactions of one-neutron halo nucleus 31Ne

Jun 4, 2018, 1:30 PM
Kunibiki Messe (Matsue)

Kunibiki Messe


Oral contribution Session 3


Mr Takato Tomai (Tokyo Institute of Technology, Department of physics)


It is well known that N=20 shell gap disappears in the "island of inversion" and thus strong deformation appears.
The one-neutron halo nucleus 31Ne, located in the island of inversion, has attracted much attention because it is the first example of a deformation-driven halo nucleus.
Recent experimental studies on 31Ne revealed that it has low separation energy Sn=0.15(+0.16)(-0.10)MeV, and ground-state spin and parity 3/2-.
These experimental results are consistent with a picture of deformed halo structure.
However the deformation has not measured directly yet.

We have performed an invariant-mass spectroscopy of 31Ne in the nuclear breakup reaction with a carbon target at ~230 MeV/u, aiming at observing its rotational band.
Additionally we also carried out a Coulomb breakup measurement with a lead target at ~230 MeV/u, in order to investigate its ground state properties.
These experiments have been done using SAMURAI spectrometer at RIBF, RIKEN.
The experimental results will be discussed in the presentation.

Primary author

Mr Takato Tomai (Tokyo Institute of Technology, Department of physics)

Presentation materials