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Journal Articles Physical Review Letters Year : 2009

Halo Structure of the Island of Inversion Nucleus 31Ne

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T. Nakamura
  • Function : Author
N. Kobayashi
  • Function : Author
Y. Kondo
  • Function : Author
Y. Satou
  • Function : Author
N. Aoi
  • Function : Author
H. Baba
  • Function : Author
S. Deguchi
  • Function : Author
N. Fukuda
  • Function : Author
J. Gibelin
N. Inabe
  • Function : Author
M. Ishihara
  • Function : Author
D. Kameda
  • Function : Author
Y. Kawada
  • Function : Author
T. Kubo
  • Function : Author
K. Kusaka
  • Function : Author
A. Mengoni
  • Function : Author
T. Motobayashi
  • Function : Author
T. Ohnishi
  • Function : Author
M. Ohtake
  • Function : Author
N.A. Orr
  • Function : Author
  • PersonId : 940479
H. Otsu
  • Function : Author
T. Otsuka
  • Function : Author
A. Saito
  • Function : Author
H. Sakurai
S. Shimoura
  • Function : Author
T. Sumikama
H. Takeda
  • Function : Author
E. Takeshita
  • Function : Author
M. Takechi
  • Function : Author
S. Takeuchi
  • Function : Author
K. Tanaka
  • Function : Author
K.N. Tanaka
  • Function : Author
N. Tanaka
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Y. Togano
  • Function : Author
Y. Utsuno
  • Function : Author
K. Yoneda
  • Function : Author
A. Yoshida
  • Function : Author
K. Yoshida
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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.

Dates and versions

in2p3-00443978 , version 1 (05-01-2010)

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Cite

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