New Description of the Doublet Bands in Doubly Odd Nuclei

Abstract

The experimentally observed $\Delta I=1$ doublet bands in some odd-odd nuclei are analyzed within the orthosymplectic extension of the Interacting Vector Boson Model (IVBM). A new, purely collective interpretation of these bands is given on the basis of the obtained boson-fermion dynamical symmetry of the model. It is illustrated by its application to three odd-odd nuclei from the $A\sim 130$ region, namely ${}^{126}Pr$, ${}^{134}Pr$ and ${}^{132}La$. The theoretical predictions for the energy levels of the doublet bands as well as $E2$ and $M1$ transition probabilities between the states of the yrast band in the last two nuclei are compared with experiment and the results of other theoretical approaches. The obtained results reveal the applicability of the orthosymplectic extension of the IVBM.

15 pages, 13 figures

References in corpus (4)

• Description of the Ground and Octupole Bands in the Symplectic Extension of the Interacting Vector Boson Model
• Energy Systematics of Low-lying Collective States within the Framework of the Interacting Vector Boson Model
• Collective states of the odd-mass nuclei within the framework of the Interacting Vector Boson Model
• Transition probabilities in the U(6) limit of the Symplectic Interacting Vector Boson Model

Cited by in corpus (3)

• Semiclassical description of chiral geometry in triaxial nuclei
• Two-dimensional collective Hamiltonian for chiral and wobbling modes II: Electromagnetic transitions
• Structure of the doublet bands in doubly odd nuclei: The case of ${}^{128}Cs$