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Journal Articles Physical Review Letters Year : 2016

Nucleus $^{26}$O: A Barely Unbound System beyond the Drip Line

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Y. Kondo
  • Function : Author
T. Nakamura
  • Function : Author
R. Tanaka
  • Function : Author
R. Minakata
  • Function : Author
S. Ogoshi
  • Function : Author
N.A. Orr
  • Function : Author
  • PersonId : 940479
N.L. Achouri
T. Aumann
  • Function : Author
H. Baba
  • Function : Author
P. Doornenbal
  • Function : Author
N. Fukuda
  • Function : Author
J. Gibelin
J.W. Hwang
  • Function : Author
N. Inabe
  • Function : Author
T. Isobe
  • Function : Author
D. Kameda
  • Function : Author
D. Kanno
  • Function : Author
S. Kim
  • Function : Author
N. Kobayashi
  • Function : Author
T. Kobayashi
  • Function : Author
T. Kubo
  • Function : Author
J. Lee
  • Function : Author
F.M. Marqués
  • Function : Author
  • PersonId : 941129
T. Motobayashi
  • Function : Author
D. Murai
  • Function : Author
T. Murakami
  • Function : Author
K. Muto
  • Function : Author
T. Nakashima
  • Function : Author
N. Nakatsuka
  • Function : Author
S. Nishi
  • Function : Author
H. Otsu
  • Function : Author
H. Sato
  • Function : Author
Y. Satou
  • Function : Author
Y. Shimizu
  • Function : Author
H. Suzuki
  • Function : Author
K. Takahashi
  • Function : Author
H. Takeda
  • Function : Author
S. Takeuchi
  • Function : Author
Y. Togano
  • Function : Author
A.G. Tuff
  • Function : Author
K. Yoneda
  • Function : Author

Abstract

The unbound nucleus 26O has been investigated using invariant-mass spectroscopy following one-proton removal reaction from a 27F beam at 201  MeV/nucleon. The decay products, 24O and two neutrons, were detected in coincidence using the newly commissioned SAMURAI spectrometer at the RIKEN Radioactive Isotope Beam Factory. The 26O ground-state resonance was found to lie only 18±3(stat)±4(syst)  keV above threshold. In addition, a higher lying level, which is most likely the first 2+ state, was observed for the first time at 1.28+0.11−0.08  MeV above threshold. Comparison with theoretical predictions suggests that three-nucleon forces, pf-shell intruder configurations, and the continuum are key elements to understanding the structure of the most neutron-rich oxygen isotopes beyond the drip line.
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Dates and versions

in2p3-01285922 , version 1 (10-03-2016)

Identifiers

Cite

Y. Kondo, T. Nakamura, R. Tanaka, R. Minakata, S. Ogoshi, et al.. Nucleus $^{26}$O: A Barely Unbound System beyond the Drip Line. Physical Review Letters, 2016, 116 (10), pp.102503. ⟨10.1103/PhysRevLett.116.102503⟩. ⟨in2p3-01285922⟩
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