Extended interacting boson model description of Pd nuclei in the A∼100 transitional region

M Böyükata,C Fransen,J Jolie,E Ellinger,S Lunardi,R Menegazzo,P Di Nezza,C Signorini,C Bucci,A Dainese,M Chiari,A Nannini,P.G Bizzeti,J.J Valiente-Dobon

doi:10.1051/epjconf/20146602013

Abstract

Studies of even-even nuclei in the A∼100 transitional mass region within the framework of the interacting boson model-1 (IBM-1) have been expanded down to 98 Pd nuclei to compare the calculation with new experimental results from measurements obtained at the Institute of Nuclear Physics in Cologne. The low-lying energy levels and the E2 transition rates of 98−100 Pd nuclei are investigated and their geometric structures are described in the present work. We have also focused on the new B(E2:2 + → 0 + ) values of 112,114 Pd nuclei to compare with previously calculated values.

Highlights

The structure of the even-even nuclei in the A∼100 region were studied both theoretically and experimentally during the last years [1,2,3,4,5,6,7,8,9]
The even-even Pd, Ru and Mo nuclei around the N=50 shell show the spherical behaviour according to the interacting boson model-1 (IBM-1) calculation in Ref. [6]
It is clearly seen that the geometric shape of both nuclei are spherical since minimums of energies are found at β ≃ 0

Summary

Introduction

The structure of the even-even nuclei in the A∼100 region were studied both theoretically and experimentally during the last years [1,2,3,4,5,6,7,8,9]. The energy levels and B(E2) values of 98,100Pd isotopes have been calculated with refitted IBM-1 parameters and compared to new experimental results [8, 9]. We have briefly mentioned about the new experiment on 98Pd nucleus in this work but the detailed discussion will be presented in a forthcoming paper [14].

The Interacting Boson Model

New experimental data on 98Pd

E MeV E MeV

Discussion

B E2:61 41