• Rapid Communication

Octupole correlations in neutron-rich 143,145Ba and a type of superdeformed band in 145Ba

S. J. Zhu et al.
Phys. Rev. C 60, 051304(R) – Published 6 October 1999
PDFExport Citation

Abstract

High spin states in neutron-rich odd-Z 143,145Ba nuclei have been investigated from the study of prompt γ rays in the spontaneous fission of 252Cf by using γ-γ- and γ-γ-γ- coincidence techniques. Alternating parity bands are identified for the first time in 145Ba and extended in 143Ba. A new side band, with equal, constant dynamic, and kinetic moments of inertia equal to the rigid body value, as found in superdeformed bands, is discovered in 145Ba. Enhanced E1 transitions between the negative- and positive-parity bands in these nuclei give evidence for strong octupole deformation in 143Ba and in 145Ba. These collective bands show competition and coexistence between symmetric and asymmetric shapes in 145Ba. Evidence is found for crossing M1 and E1 transitions between the s=+i and s=i doublets in 143Ba.

  • Received 22 June 1999

DOI:https://doi.org/10.1103/PhysRevC.60.051304

©1999 American Physical Society

Authors & Affiliations

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 60, Iss. 5 — November 1999

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×