Isospin mixing in proton-rich N (approx equal) Z nuclei

摘要

Estimates of isospin mixing in proton-rich medium-heavy nuclei in the region of mass numbers A = 80 and A = 100 are made with the use of Hartree-Fock calculations with Skyrme forces. An isospin mixing probability of 4-5% is predicted in the ground state of (sup 100)Sn and about 3-4% in (sup 80)Zr. These are about a factor two larger than the estimates given by Bohr and Mottelson who directly evaluate the isospin mixing with a collective model description of the isovector monopole resonance (IVMR). We show that if we use of the energy-weighted sum rule together with the energies of the IVMR given by Bohr and Mottelson, the predicted isospin admixtures are close to those of HF calculations. (authors). 11 refs., 2 figs., 3 tabs. (Atomindex citation 28:010166)