Eur. Phys. J. A (2013) 49: 4
https://doi.org/10.1140/epja/i2013-13004-1

Regular Article - Theoretical Physics

Microscopic study of neutron-rich dysprosium isotopes

¹ Facultad de Física e Inteligencia Artificial, Universidad Veracruzana, Sebastián Camacho 5, Ver., 91000, Xalapa, Mexico
² Facultad de Ciencias, Universidad Nacional Autónoma de México, Apartado Postal 70-542, 04510, México D.F., Mexico

^* e-mail: cavargas@uv.mx

Received: 30 May 2012
Revised: 14 November 2012
Accepted: 4 December 2012
Published online: 11 January 2013

Abstract

Microscopic studies in heavy nuclei are very scarce due to large valence spaces involved. This computational problem can be avoided by means of the use of symmetry-based models. Ground-state, γ and β bands, and their B(E2) transition strengths in ^160–168Dy isotopes, are studied in the framework of the pseudo-SU(3) model which includes the preserving symmetry Q · Q term and the symmetry-breaking Nilsson and pairing terms, systematically parametrized. Additionally, three rotor-like terms are considered, whose free parameters, fixed for all members of the chain, are used to fine tune the moment of inertia of rotational bands and the band head of γ and β bands. The model succesfully describes in a systematic way rotational features in these nuclei and allows to extrapolate toward the midshell nucleus ¹⁷⁰Dy. The results presented show that it is possible to study a full chain of isotopes or isotones in the region with the present model.