High-spin states have been populated in Xe-114(54) via the Ni-58(Ni-58, 2p)
reaction at 210 MeV, using the JUROSPHERE gamma-ray spectrometer to record
gamma-ray coincidences. The known level scheme has been significantly exte
nded and includes two positive-parity and three negative-parity structures.
At the highest spins, one of the negative-parity bands becomes yrast and s
hows the characteristics of a smoothly terminating band, Quadrupole moments
for two of the bands at high spin have been estimated through a Doppler-br
oadened lineshape analysis; the terminating band has a reduced quadrupole m
oment implying that it is not far from full termination into a noncollectiv
e oblate state. Extracted B(E1) strengths are discussed in terms of possibl
e octupole collectivity (C) 2000 Elsevier Science B.V. All rights reserved.