Octupole deformation in neutron-rich barium isotopes
W. R. PhillipsArgonne National Laboratory, Argonne, Illinois 60439I. AhmadArgonne National Laboratory, Argonne, Illinois 60439H. EmlingArgonne National Laboratory, Argonne, Illinois 60439R. HolzmannArgonne National Laboratory, Argonne, Illinois 60439R. V. F. JanssensArgonne National Laboratory, Argonne, Illinois 60439T. L. KhooArgonne National Laboratory, Argonne, Illinois 60439M. W. DrigertArgonne National Laboratory, Argonne, Illinois 60439
1986en
ABI
Abstract
Partial decay schemes for the very neutron-rich nuclei $^{142}$,144Ba and $^{146}\mathrm{Ba}$ have been determined by the study of \ensuremath{\gamma}-\ensuremath{\gamma} coincidences in $^{252}\mathrm{Cf}$ fission fragments. Interlaced positive- and negative-parity levels connected by fast electric dipole transitions are observed in $^{144}\mathrm{Ba}$ and $^{146}\mathrm{Ba}$ above spin 7\ensuremath{\Elzxh}. This is similar to the situation in some light actinide nuclei, where the data have been interpreted in terms of reflection-asymmetric shapes.
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