Isospin Mixing in Nuclei Within the Nuclear Density Functional Theory

Journal Article · Thu Jan 01 04:00:00 EST 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.103.012502· OSTI ID:963696

Satula, W. ^[1]; Dobaczewski, J. ^[1]; Nazarewicz, Witold ^[2]; Rafalski, M. ^[1]

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1. Warsaw University
2. ORNL

We present the self-consistent, non-perturbative analysis of isospin mixing using the nuclear density functional approach and the rediagonalization of the Coulomb interaction in the good-isospin basis. The largest isospin-breaking effects are predicted for N=Z nuclei and they quickly fall with the neutron excess. The unphysical isospin violation on the mean-field level, caused by the neutron excess, is eliminated by the proposed method. We find a significant dependence of the magnitude of isospin breaking on the parametrization of the nuclear interaction term. A rough correlation has been found between the isospin mixing parameter and the difference of proton and neutron rms radii. The theoretical framework described in this study is well suited to describe a variety of phenomena associated with isospin violation in nuclei, in particular the isospin symmetry-breaking corrections to superallowed Fermi beta decays.

• Research Organization: Oak Ridge National Laboratory (ORNL); Holifield Radioactive Ion Beam Facility
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 963696
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 1 Vol. 103; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BETA DECAY
FUNCTIONALS
ISOSPIN
NEUTRONS
NUCLEAR MATTER
NUCLEI
PROTONS
SYMMETRY BREAKING