Shape evolution and Gamow-Tellerβ-decay of neutron-rich A∼100 nuclei within beyond-mean-field approach

A Petrovici

doi:10.1051/epjconf/20136301012

Abstract

Neutron-rich nuclei in the A∼100 mass region manifest drastic changes in some isotopic chains and sudden variations of particular nuclear properties with increasing spin and excitation energy. Our recent investigations represent an attempt to the self-consistent description of exotic phenomena in neutron-rich A∼100 nuclei within the complex Excited Vampir model using a realistic effective interaction in a large model space. Triple shape coexistence and shape evolution in the N=58 Sr and Zr isotopes as well as Gamow-Teller β-decay of 102,104Tc nuclei are discussed.

Highlights

We investigated the structural changes and the evolution of deformation with increasing spin aiming at a unitary description of the lowest few 0+ states and the low, intermediate, and high spins in 96Sr and 98Zr
We calculated the lowest positive parity states up to spin 20+ in 96Sr and 98Zr including in the Excited Vampir many-nucleon bases up to 12 EXVAM configurations
A particular situation is found for the 0+ states: the lowest projected EXVAM configuration is spherical in both nuclei

Summary

Introduction

We calculated the lowest positive parity states up to spin 20+ in 96Sr and 98Zr including in the Excited Vampir many-nucleon bases up to 12 EXVAM configurations. Support for the mixing of configurations with different intrinsic deformations in the structure of the wave functions for the 0+ states is offered by the strong ρ2(E0) values found theoretically and experimentally in both nuclei.

Results

Conclusion