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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:76.26(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.