Abstract
Nuclear structure of doublet bands in doubly odd nuclei with mass A ∼ 130 is investigated within the framework of a simple model where the even-even core couples with a neutron and a proton in intruder orbitals through a quadrupole-quadrupole interaction. The model reproduces quite well the energy levels of doublet bands and electromagnetic transitions. The staggering of the ratios B(M1;I → I - 1)/B(E2;I → I - 2) of the yrast bands turns out to be described by the chopsticks-like motion of two angular momenta of the unpaired neutron and the unpaired proton when they are weakly coupled with the core.-1
Highlights
Nuclear structure of doublet bands in doubly odd nuclei with mass A ∼ 130 is investigated within the framework of a simple model where the even-even core couples with a neutron and a proton in intruder orbitals through a quadrupole-quadrupole interaction
The pair truncated shell model (PTSM) successfully describes the properties of doubly odd nuclei in the mass A ∼ 130 region, i.e., both energy spectra and features of electromagnetic transitions
The band structure of the doublet bands is well explained by the chopsticks-like motion of two angular momenta of the odd neutron and the odd proton, weakly coupled with the core
Summary
Higashiyama Department of Physics, Saitama University, Saitama City 338-8570, Japan 2 Department of Physics, Chiba Institute of Technology, Narashino, Chiba 275-0023, Japan 3 Department of Physics, University of Tokyo, Hongo, Tokyo 113-0033, Japan. Received: 10 August 2006 / Revised: 28 September 2006 / Published online: 15 November 2006 – c Societa Italiana di Fisica / Springer-Verlag 2006 Communicated by S.
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