Excited states in145 Ba, populated in spontaneous fission of 248 Cm, have been studied by means of γ spectroscopy, using high-fold γ coincidences measured with the EUROGAM2 array of Ge detectors. The 507.7-keV level, which has been assigned in this work spin and parity 9/2 + , belongs to the i 13/2 intruder band. We have identified in 145 Ba a new 9/2 − 2 level at 346.3 keV and a band on top of it. The negative parity indicates that it is not due to an octupole excitation. The position of the 5/2 − ground state, relative to the positive-parity band, could be reproduced by calculations with a reflection-symmetric potential and we do not observe a parity doublet to the ground state. Therefore we conclude that octupole excitations in 145 Ba are most likely due to octupole vibrations coupled either to the reflection-symmetric ground state or to the i 13/2 , decoupled neutron configuration.
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