In-beam γ-ray spectroscopy of U240 using the (O18,O16) reaction

T. Ishii, S. Shigematsu, M. Asai, A. Makishima, M. Matsuda, J. Kaneko, I. Hossain, S. Ichikawa, T. Kohno, M. Ogawa

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21 Citations (Scopus)


In the two-neutron-transfer reaction of a 200-MeV O18 beam with a U238 target, deexcitation γ rays in a neutron-rich nucleus of U240 were measured. The γ rays in U240 were identified by taking coincidence with O16, using Si ΔE-E detectors. The kinetic energies of O16 particles allowed us to select the excitation energies of U240 below the neutron separation energy. The ground-state band and the Kπ=0- octupole band of U240 were established up to 12+ and 9-, respectively. The octupole-band head of U240 is about a hundred keV higher than those of U236,238, suggesting that a secondary maximum of octupole correlations exists at N=144-146 in U isotopes.

Original languageEnglish
Article number021301
JournalPhysical Review C - Nuclear Physics
Issue number2
Publication statusPublished - Aug 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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