In-beam γ -ray study of the neutron-rich nuclei 240U, 246Pu, and 250Cm produced by the (18O, 16O) reaction |
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| Authors: | T. Ishii S. Shigematsu H. Makii M. Asai K. Tsukada A. Toyoshima M. Matsuda A. Makishima T. Shizuma J. Kaneko I. Hossain H. Toume M. Ohara S. Ichikawa T. Kohno M. Ogawa |
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| Affiliation: | (1) Advanced Science Research Center, Japan Atomic Energy Agency, Ibaraki, Japan;(2) Department of Energy Sciences, Tokyo Institute of Technology, Yokohama, Japan;(3) Department of Research Reactor and Tandem Accelerator, Japan Atomic Energy Agency, Ibaraki, Japan;(4) Department of Liberal Arts and Sciences, National Defense Medical College, Tokorozawa, Saitama, Japan;(5) Quantum Beam Science Directorate, Japan Atomic Energy Agency, Kyoto, Japan;(6) Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, Meguro, Japan;(7) Department of Physics, Seoul National University, Korea;(8) College of Science, Ibaraki University, Japan;(9) Present address: Department of Physics, Shah Jalal University of Science and Technology, Sylhet, Bangladesh |
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| Abstract: | We have measured deexcitation γ rays in the neutron-rich nuclei of 240U, 246Pu, and 250Cm produced by the (18O, 16O) two-neutron transfer reactions, in coincidence with the 16O particles using Si ΔE−E detectors. The γ rays in these nuclei were identified by selecting the kinetic energies of 16O particles, which correspond to the excitation energies in the residual nuclei below the neutron separation energies. The ground-state bands of 240U, 246Pu, and 250Cm were established up to 12+ states and the K π = 0− octupole band of 240U was established up to 9− states. The systematics of the moments of inertia of the ground-state bands for actinide nuclei shows that the deformed subshell closure at N = 152 is sustained for 96Cm isotopes and that it disappears for 94Pu isotopes. The text was submitted by the authors in English. |
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