The N = 16 spherical shell closure in 24O
K. Tshoo
,
Y. Satou
,
H. Bhang
,
S. Choi
,
T. Nakamura
,
Y. Kondo
,
S. Deguchi
,
Y. Kawada
,
N. Kobayashi
(1)
,
Y. Nakayama
,
K. N. Tanaka
,
N. Tanaka
,
N. Aoi
,
M. Ishihara
,
T. Motobayashi
,
H. Otsu
,
H. Sakurai
,
S. Takeuchi
,
Y. Togano
,
K. Yoneda
,
Z. H. Li
,
F. Delaunay
(2)
,
J. Gibelin
(3)
,
F.M. Marqués
(3)
,
N.A. Orr
(3)
,
T. Honda
,
M. Matsushita
,
T. Kobayashi
(4)
,
Y. Miyashita
,
T. Sumikama
,
K. Yoshinaga
,
S. Shimoura
,
D. Sohler
(5)
,
T. Zheng
,
Z. X. Cao
K. Tshoo
- Function : Author
Y. Satou
- Function : Author
H. Bhang
- Function : Author
S. Choi
- Function : Author
T. Nakamura
- Function : Author
Y. Kondo
- Function : Author
S. Deguchi
- Function : Author
Y. Kawada
- Function : Author
Y. Nakayama
- Function : Author
K. N. Tanaka
- Function : Author
N. Tanaka
- Function : Author
N. Aoi
- Function : Author
M. Ishihara
- Function : Author
T. Motobayashi
- Function : Author
H. Otsu
- Function : Author
H. Sakurai
- Function : Author
- PersonId : 755357
- ORCID : 0000-0002-6215-4254
S. Takeuchi
- Function : Author
Y. Togano
- Function : Author
K. Yoneda
- Function : Author
Z. H. Li
- Function : Author
F. Delaunay
- Function : Author
- PersonId : 929817
- ORCID : 0000-0003-4927-1701
- IdRef : 175271550
J. Gibelin
- Function : Author
- PersonId : 11987
- IdHAL : julien-gibelin
- ORCID : 0000-0001-6751-3714
- IdRef : 105736708
F.M. Marqués
- Function : Author
- PersonId : 941129
- ORCID : 0000-0002-9456-6448
N.A. Orr
- Function : Author
- PersonId : 940479
- ORCID : 0000-0002-8499-8693
T. Honda
- Function : Author
M. Matsushita
- Function : Author
Y. Miyashita
- Function : Author
T. Sumikama
- Function : Author
- PersonId : 757885
- ORCID : 0000-0002-7262-5339
K. Yoshinaga
- Function : Author
S. Shimoura
- Function : Author
D. Sohler
- Function : Author
- PersonId : 755248
- ORCID : 0000-0002-9250-135X
T. Zheng
- Function : Author
Z. X. Cao
- Function : Author
Abstract
The unbound excited states of the neutron drip-line isotope 24O have been investigated via the 24O(p,p')23O+n reaction in inverse kinematics at a beam energy of 62 MeV/nucleon. The decay energy spectrum of 24O* was reconstructed from the momenta of 23O and the neutron. The spin-parity of the first excited state, observed at Ex = 4.65 +/- 0.14 MeV, was determined to be Jpi = 2+ from the angular distribution of the cross section. Higher lying states were also observed. The quadrupole transition parameter beta2 of the 2+ state was deduced, for the first time, to be 0.15 +/- 0.04. The relatively high excitation energy and small beta2 value are indicative of the N = 16 shell closure in 24O.