Competition between collective and noncollective excitation modes at high spin in Ba-124

• High-spin states in Ba-124 were investigated in two experiments using the Ni-64(Ni-64, 4n)Ba-124 reaction at three different beam energies. In-beam gamma-ray coincidences were measured with the Euroball and Gammasphere detector arrays. In the experiment with Euroball, the CsI detector array Diamant was employed to discriminate against charged-particle channels. Six new rotational bands were observed in Ba-124, and previously known bands were extended to higher spins. One of the bands shows a transition from collective to noncollective behavior at high spins. Configuration assignments are suggested on the basis of comparison with cranked shell model and cranked Nilsson-Strutinsky calculations.

Keyword

gamma-ray spectroscopy

ba-ce-region

rotational bands

mass region

terminating bands

xe-nuclei

states

alignments

hyperdeformation

spectrometer

Publication and Content Type

ref (subject category)

art (subject category)