Fr219, a transitional reflection asymmetric nucleus

C. F. Liang, P. Paris, J. Kvasil, and R. K. Sheline
Phys. Rev. C 44, 676 – Published 1 August 1991
PDFExport Citation

Abstract

Mass-separated sources of Ac223 (separated as AcF2+) were used to study the level structure of Fr219 following alpha decay. The levels in Fr219 are interpreted in terms of K=1/2±, 3/2±, and 5/2± parity doublet bands which have a natural theoretical explanation in terms of reflection asymmetric models. The 9/2 ground-state member of the K=1/2 band in Fr219 can be understood in terms of both reflection asymmetry and the collapse of the quadrupole-octupole Nilsson orbitals towards the h9/2 orbitals of spherical symmetry. Comparison of the K=1/2 ground-state bands in Fr219 and Fr221 reveals the details of this transformation. Theoretical analysis of the microscopic structure of several of the positive-parity bands indicates the presence of important Nilsson configurations arising from the shell below.

  • Received 8 November 1990

DOI:https://doi.org/10.1103/PhysRevC.44.676

©1991 American Physical Society

Authors & Affiliations

C. F. Liang and P. Paris

  • Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, Bâtiment 104, 91405 Campus Orsay, France

J. Kvasil and R. K. Sheline

  • Departments of Chemistry and Physics, Florida State University, Tallahassee, Florida 32306

References (Subscription Required)

Click to Expand
Issue

Vol. 44, Iss. 2 — August 1991

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
×