In-beam {gamma}-ray study of the neutron-rich nuclei {sup 240}U, {sup 246}Pu, and {sup 250}Cm produced by the ({sup 18}O, {sup 16}O) reaction

Journal Article · Wed Aug 15 04:00:00 EDT 2007 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778807080224· OSTI ID:21075739

Ishii, T; Shigematsu, S; Makii, H; Asai, M; Tsukada, K; Toyoshima, A ^[1]; Matsuda, M ^[2]; Makishima, A ^[3]; Shizuma, T ^[4]; Kaneko, J ^[5]; Hossain, I ^[6]; Toume, H ^[1]; Ohara, M ^[7]; Ichikawa, S ^[1]; Kohno, T ^[7]; Ogawa, M ^[5]

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1. Japan Atomic Energy Agency, Advanced Science Research Center (Japan)
2. Japan Atomic Energy Agency, Department of Research Reactor and Tandem Accelerator (Japan)
3. National Defense Medical College, Department of Liberal Arts and Sciences (Japan)
4. Japan Atomic Energy Agency, Quantum Beam Science Directorate (Japan)
5. Tokyo Institute of Technology, Research Laboratory for Nuclear Reactors (Japan)
6. Shah Jalal University of Science and Technology, Department of Physics (Bangladesh)
7. Tokyo Institute of Technology, Department of Energy Sciences (Japan)

We have measured deexcitation {gamma} rays in the neutron-rich nuclei of {sup 240}U, {sup 246}Pu, and {sup 250}Cm produced by the ({sup 18}O, {sup 16}O) two-neutron transfer reactions, in coincidence with the {sup 16}O particles using Si {delta}E-E detectors. The {gamma} rays in these nuclei were identified by selecting the kinetic energies of {sup 16}O particles, which correspond to the excitation energies in the residual nuclei below the neutron separation energies. The ground-state bands of {sup 240}U, {sup 246}Pu, and {sup 250}Cm were established up to 12{sup +} states and the K{sup {pi}} = 0{sup -} octupole band of {sup 240}U was established up to 9{sup -} 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 {sub 96}Cm isotopes and that it disappears for {sub 94}Pu isotopes.

• OSTI ID: 21075739
• Journal Information: Physics of Atomic Nuclei, Journal Name: Physics of Atomic Nuclei Journal Issue: 8 Vol. 70; ISSN 1063-7788; ISSN PANUEO
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BEAMS
CURIUM 250
DE-EXCITATION
EXCITATION
GAMMA RADIATION
GROUND STATES
KINETIC ENERGY
MOMENT OF INERTIA
NEUTRON EMISSION
NEUTRON SEPARATION ENERGY
NEUTRON TRANSFER
NEUTRON-RICH ISOTOPES
OCTUPOLES
OXYGEN 16
OXYGEN 18
PLUTONIUM 246
URANIUM 240