Simultaneous description of four positive and four negative parity bands

Abstract

The extended coherent state model is further extended in order to describe two dipole bands of different parities. The formalism provides a consistent description of eight rotational bands. A unified description for spherical, transitional and deformed nuclei is possible. Projecting out the angular momentum and parity from a sole state, the $K^{\pi }=1^{+}$ band acquires a magnetic character, while the electric properties prevail for the other band. Signatures for a static octupole deformation in some states of the dipole bands are pointed out. Some properties which distinguish between the dipole band states and states of the same parity but belonging to other bands are mentioned. Interesting features concerning the decay properties of the two bands are found. Numerical applications are made for ${}^{158}$Gd, ${}^{172}$Yb, ${}^{228,232}$Th, ${}^{226}$Ra, ${}^{238}$U and ${}^{238}$Pu, and the results are compared with the available data.

arXiv comment36 pages, 13 figures, 12 tables

References in corpus (4)

• Description of even-even triaxial Nuclei within the Coherent State and the Triaxial Rotation-Vibration Models
• Unified description of three positive and three negative parity interacting bands
• Description of collective magnetic states within a spherical single particle basis
• Non-Scissors-Mode Behaviour of Isovector Magnetic Dipole Orbital Transitions Involving Isospin Transfer

Cited by in corpus (6)

• Non-yrast nuclear spectra in a model of coherent quadrupole-octupole motion
• Description of nuclear octupole and quadrupole deformation close to the axial symmetry: Critical-point behavior of 224Ra and 224Th
• New features of the triaxial nuclei described with a coherent state model
• A new picture for the chiral symmetry properties within a particle-core framework
• The CSM extension for the description of positive and negative parity bands in even-odd nuclei
• Parity Partner Bands in ${}^{163}$Lu: A novel approach for describing the negative parity states from a triaxial super-deformed band