Isospin mixing and Fermi transitions for some deformed nuclei

Authors

SERDAR ÜNLÜ
HASAN ALİ AYGÖR
NECLA ÇAKMAK
CEVAD SELAM

DOI

10.3906/fiz-1604-22

Abstract

We have tried to give a self-consistent explanation of isospin mixing and Fermi beta decays for 54 $\le $ Z $\le $ 68 deformed nuclei. The effect of isospin impurity in nuclear ground states on Fermi beta transitions has been investigated considering the restoration of symmetry violations stemming from the mean field approximation. The isobar analogue excitations in neighbor odd-odd nuclei have been obtained by following the proton-neutron quasiparticle random phase approximation (pnQRPA) procedure. The dependence of isospin admixture probability on the deformation parameter has been determined for various isotopes of Z = 54-68 nuclei. Then the variations of isobar analogue state energies and the $\beta $ decay log(ft) values with deformation parameter have been calculated for the same nuclei. Thus, the influences of the isospin symmetry violations on Fermi transitions can be clearly understood.

Keywords

Isospin symmetry, pnQRPA

First Page

304

Last Page

315

Recommended Citation

ÜNLÜ, SERDAR; AYGÖR, HASAN ALİ; ÇAKMAK, NECLA; and SELAM, CEVAD (2016) "Isospin mixing and Fermi transitions for some deformed nuclei," Turkish Journal of Physics: Vol. 40: No. 3, Article 13. https://doi.org/10.3906/fiz-1604-22
Available at: https://journals.tubitak.gov.tr/physics/vol40/iss3/13