Medium-spin structure of Cs-145

作者：Rzaca Urban T^*; Urban W; Pinston J A; Simpson G S; Durell J L; Smith A G; Ahmad I

来源：Physical Review C, 2010, 82(1): 017301.

DOI：10.1103/PhysRevC.82.017301

Excited states in Cs-145, populated following the spontaneous fission of Cm-248, were studied by means of prompt-gamma spectroscopy, using the EUROGAM2 multidetector array. A new level scheme of Cs-145 was proposed. We identified a decoupled band corresponding to 1/2 [550] proton configuration and interpreted the ground-state band as a mixed configuration of 1/2 [440] and 3/2 [422] proton orbitals. Quasiparticle-rotor calculations performed for Cs-145 support such assignments. The electric dipole moment in Cs-145, D-0 = 0.013(4) efm, is smaller than in lighter Cs isotopes, which suggests that octupole correlations in Cs isotopes decrease at the neutron number N = 90, similarly as observed in the Ba-146 and La-147 isotones.

• 出版日期2010-7-6