부산대학교 도서관

This work reports the first rotational bands observed in the neutron-deficient nucleus 231232αγν[633]5/2+ν[752]5/2-ν[631]3/2+ν[752]5/2-U. Excited states were populated in the 231232αγν[633]5/2+ν[752]5/2-ν[631]3/2+ν[752]5/2-Th(231232αγν[633]5/2+ν[752]5/2-ν[631]3/2+ν[752]5/2-,5n) reaction at a beam energy of 52 MeV. Coincident decay 231232αγν[633]5/2+ν[752]5/2-ν[631]3/2+ν[752]5/2--rays were measured with the high-purity germanium detectors of the afrodite spectrometer array, in conjunction with a recoil detector to discriminate against the fission background. The bands are interpreted as the ground-state band 231232αγν[633]5/2+ν[752]5/2-ν[631]3/2+ν[752]5/2-, yrast band 231232αγν[633]5/2+ν[752]5/2-ν[631]3/2+ν[752]5/2-, and an excited band 231232αγν[633]5/2+ν[752]5/2-ν[631]3/2+ν[752]5/2-. Configuration assignments are supported by Cranked Shell Model and B(M1)/B(E2) calculations. The excitation energy of the 231232αγν[633]5/2+ν[752]5/2-ν[631]3/2+ν[752]5/2- bandhead is suggested to be 113.0 keV.