期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.022501
关键词
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资金
- MEXT Japan [19740133]
- WCU program
- NRF Korea [2010-0024521]
- National Research Foundation of Korea [R32-2012-000-10155-0, 2010-0024521] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Grants-in-Aid for Scientific Research [24105001, 24105005, 24740154, 19740133, 22340053, 10J09675, 22340072] Funding Source: KAKEN
The unbound excited states of the neutron drip-line isotope O-24 have been investigated via the O-24(p, p')O-23 + n reaction in inverse kinematics at a beam energy of 62 MeV/nucleon. The decay energy spectrum of O-24* was reconstructed from the momenta of O-23 and the neutron. The spin parity of the first excited state, observed at E-x = 4.65 +/- 0.14 MeV, was determined to be J(pi) = 2(+) from the angular distribution of the cross section. Higher-lying states were also observed. The quadrupole transition parameter beta(2) of the 2(1)(+) state was deduced, for the first time, to be 0.15 +/- 0.04. The relatively high excitation energy and small beta(2) value are indicative of the N = 16 shell closure in O-24.
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