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Ishii, Tetsuro; Shigematsu, Soichiro; Asai, Masato; Makishima, Akiyasu*; Matsuda, Makoto; Kaneko, Junichi*; Hossain, I.*; Ichikawa, Shinichi; Kono, Toshiyuki*; Ogawa, Masao*
Physical Review C, 72(2), p.021301_1 - 021301_5, 2005/08
Times Cited Count:20 Percentile:76.34(Physics, Nuclear)In the two-neutron-transfer reaction of a 200-MeV O beam with a U target, deexcitation rays in a neutron-rich nucleus of U were measured. The rays in U were identified by taking coincidence with O, using Si - detectors. The kinetic energies of O particles allowed us to select the excitation energies of U below the neutron separation energy. The ground-state band and the octupole band of U were established up to 12 and 9, respectively. The octupole-band head of U is higher than those of U by about a hundred keV, suggesting that a secondary maximum of octupole correlations exists at in U isotopes.