In-beam {gamma}-ray spectroscopy of {sup 240}U using the ({sup 18}O,{sup 16}O) reaction
- Department of Materials Science, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195 (Japan)
- Department of Energy Sciences, Tokyo Institute of Technology, Yokohama 226-8502 (Japan)
- Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195 (Japan)
- Department of Liberal Arts and Sciences, National Defense Medical College, Tokorozawa, Saitama 359-8513 (Japan)
- Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, Meguro, Tokyo 152-8550 (Japan)
- Department of Physics, Seoul National University, Seoul 151-747 (Korea, Republic of)
In the two-neutron-transfer reaction of a 200-MeV {sup 18}O beam with a {sup 238}U target, deexcitation {gamma} rays in a neutron-rich nucleus of {sup 240}U were measured. The {gamma} rays in {sup 240}U were identified by taking coincidence with {sup 16}O, using Si {delta}E-E detectors. The kinetic energies of {sup 16}O particles allowed us to select the excitation energies of {sup 240}U below the neutron separation energy. The ground-state band and the K{sup {pi}}=0{sup -} octupole band of {sup 240}U were established up to 12{sup +} and 9{sup -}, respectively. The octupole-band head of {sup 240}U is about a hundred keV higher than those of {sup 236,238}U, suggesting that a secondary maximum of octupole correlations exists at N=144-146 in U isotopes.
- OSTI ID:
- 20698876
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 72, Issue 2; Other Information: DOI: 10.1103/PhysRevC.72.021301; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CORRELATIONS
EXCITATION
GAMMA SPECTRA
GAMMA SPECTROSCOPY
GROUND STATES
HIGH SPIN STATES
KEV RANGE
KINETIC ENERGY
MEV RANGE
NEUTRON SEPARATION ENERGY
NEUTRON TRANSFER
NEUTRON-RICH ISOTOPES
OCTUPOLES
OXYGEN 16
OXYGEN 18 REACTIONS
PARITY
SPIN
TRANSFER REACTIONS
URANIUM 238 TARGET
URANIUM 240