0000000000049175

AUTHOR

J. Mcdonnell

showing 4 related works from this author

Solution of the Skyrme–Hartree–Fock–Bogolyubov equations in the Cartesian deformed harmonic-oscillator basis.

2012

We describe the new version (v2.38j) of the code hfodd which solves the nuclear SkyrmeHartree-Fock or Skyrme-Hartree-Fock-Bogolyubov problem by using the Cartesian deformed harmonic-oscillator basis. In the new version, we have implemented: (i) projection on good angular momentum (for the Hartree-Fock states), (ii) calculation of the GCM kernels, (iii) calculation of matrix elements of the Yukawa interaction, (iv) the BCS solutions for statedependent pairing gaps, (v) the HFB solutions for broken simplex symmetry, (vi) calculation of Bohr deformation parameters, (vii) constraints on the Schiff moments and scalar multipole moments, (viii) the D T transformations and rotations of wave functio…

PhysicsAngular momentumHardware and ArchitecturePairingQuantum mechanicsNuclear TheoryHartree–Fock methodGeneral Physics and AstronomyBroyden's methodWave functionMultipole expansionYukawa interactionHarmonic oscillatorComputer Physics Communications
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Nuclear Energy Density Optimization: UNEDF2

2014

The parameters of the UNEDF2 nuclear energy density functional (EDF) model were obtained in an optimization to experimental data consisting of nuclear binding energies, proton radii, odd-even mass staggering data, fission-isomer excitation energies, and single particle energies. In addition to parameter optimization, sensitivity analysis was done to obtain parameter uncertainties and correlations. The resulting UNEDF2 is an all-around EDF. However, the sensitivity analysis also demonstrated that the limits of current Skyrme-like EDFs have been reached and that novel approaches are called for.

Physics[PHYS.NUCL] Physics [physics]/Nuclear Theory [nucl-th]skyrme energy densityNuclear Theory[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th]ta114nuclear density functional theoryNuclear TheoryFOS: Physical sciencesLibrary scienceOak Ridge National Laboratory7. Clean energyNuclear Theory (nucl-th)Nuclear physicsEnergy densityNational laboratoryComputer Science::Operating SystemsNuclear theory
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Nuclear energy density optimization: Shell structure

2013

Nuclear density functional theory is the only microscopical theory that can be applied throughout the entire nuclear landscape. Its key ingredient is the energy density functional. In this work, we propose a new parameterization UNEDF2 of the Skyrme energy density functional. The functional optimization is carried out using the POUNDerS optimization algorithm within the framework of the Skyrme Hartree-Fock-Bogoliubov theory. Compared to the previous parameterization UNEDF1, restrictions on the tensor term of the energy density have been lifted, yielding a very general form of the energy density functional up to second order in derivatives of the one-body density matrix. In order to impose c…

PhysicsDensity matrixNuclear and High Energy PhysicsWork (thermodynamics)ta114Nuclear Theory[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th]010308 nuclear & particles physicsOrbital-free density functional theoryBinding energyNuclear TheoryFOS: Physical sciences01 natural sciencesComputational physicsNuclear physicsNuclear Theory (nucl-th)0103 physical sciencesTensor010306 general physicsParametrizationOpen shellNuclear density
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One-quasiparticle States in the Nuclear Energy Density Functional Theory

2009

We study one-quasiproton excitations in the rare-earth region in the framework of the nuclear Density Functional Theory in the Skyrme-Hartree-Fock-Bogoliubov variant. The blocking prescription is implemented exactly, with the time-odd mean field fully taken into account. The equal filling approximation is compared with the exact blocking procedure. We show that both procedures are strictly equivalent when the time-odd channel is neglected, and discuss how nuclear alignment properties affect the time-odd fields. The impact of time-odd fields on calculated one-quasiproton bandhead energies is found to be rather small, of the order of 100-200 keV; hence, the equal filling approximation is suff…

PhysicsNuclear and High Energy PhysicsNuclear TheoryEnergy density functionalNuclear TheoryFOS: Physical sciencesNuclear matterPolarization (waves)Nuclear Theory (nucl-th)Mean field theoryQuantum mechanicsQuantum electrodynamicsQuasiparticleFunctional theoryNuclear theoryNuclear density
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