0000000000207941

AUTHOR

Pawel Baczyk

showing 3 related works from this author

Isospin-symmetry breaking in masses of ≃ Nuclei

2018

Effects of the isospin-symmetry breaking (ISB) beyond mean-field Coulomb terms are systematically studied in nuclear masses near the N=Z line. The Coulomb exchange contributions are calculated exactly. We use extended Skyrme energy density functionals (EDFs) with proton–neutron-mixed densities, to which we add new terms breaking the isospin symmetry. Two parameters associated with the new terms are determined by fitting mirror and triplet displacement energies (MDEs and TDEs) of isospin multiplets. The new EDFs reproduce MDEs for the T=12 doublets and T=1 triplets, and TDEs for the T=1 triplets. Relative strengths of the obtained isospin-symmetry-breaking terms are not consistent with the d…

Nuclear and High Energy PhysicsParticle physicsprotonitNuclear TheoryTriplet displacement energy (TDE)01 natural sciencesComputer Science::Digital LibrariesDisplacement (vector)Energy density functional (EDF)Proton–neutron mixingproton–neutron mixingnuclear physicstiheysmirror displacement energy (MDE)0103 physical sciencesCoulombSymmetry breaking010306 general physicsnuclear density functional theory (DFT)density functional theoryLine (formation)Physicsdensityenergiata114protons010308 nuclear & particles physicsScatteringtiheysfunktionaaliteorianeutronsneutronitenergy density functional (EDF)lcsh:QC1-999Symmetry (physics)Isospin symmetry breaking (ISB)Isospintriplet displacement energy (TDE)isospin symmetry breaking (ISB)ydinfysiikkaMirror displacement energy (MDE)Parametrizationlcsh:PhysicsenergyPhysics Letters
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Mirror and triplet displacement energies within nuclear DFT: : numerical stability

2017

Isospin-symmetry-violating class II and III contact terms are introduced into the Skyrme energy density functional to account for charge dependence of the strong nuclear interaction. The two new coupling constants are adjusted to available experimental data on triplet and mirror displacement energies, respectively. We present preliminary results of the fit, focusing on its numerical stability with respect to the basis size.

Nuclear TheorySYMMETRYNuclear TheoryFOS: Physical sciencesGeneral Physics and Astronomy114 Physical sciences01 natural sciencesDisplacement (vector)strong nuclear forceNuclear Theory (nucl-th)0103 physical sciences010306 general physicsdisplacement energiesdensity functional theoryPARAMETRIZATIONCoupling constantPhysicsta114Energy density functionalBasis (linear algebra)010308 nuclear & particles physicstiheysfunktionaaliteoriaCharge (physics)Nuclear interactionnuclear structureAtomic physicsisospin-symmetry breakingNumerical stability
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Isospin-symmetry breaking in masses of $N\simeq Z$ nuclei

2017

Effects of the isospin-symmetry breaking (ISB) beyond mean-field Coulomb terms are systematically studied in nuclear masses near the $N=Z$ line. The Coulomb exchange contributions are calculated exactly. We use extended Skyrme energy density functionals (EDFs) with proton-neutron-mixed densities, to which we add new terms breaking the isospin symmetry. Two parameters associated with the new terms are determined by fitting mirror and triplet displacement energies (MDEs and TDEs) of isospin multiplets. The new EDFs reproduce MDEs for the $T=\frac12$ doublets and $T=1$ triplets, and TDEs for the $T=1$ triplets. Relative strengths of the obtained isospin-symmetry-breaking terms {\em are not} co…

Nuclear Theory (nucl-th)Nuclear TheoryNuclear TheoryFOS: Physical sciences
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