219 research outputs found
Ab initio no-core solutions for Li
We solve for properties of Li in the ab initio No-Core Full Configuration
approach and we separately solve for its ground state and
resonance with the Gamow Shell Model in the Berggren basis. We employ both the
JISP16 and chiral NNLO realistic nucleon-nucleon interactions and
investigate the ground state energy, excitation energies, point proton
root-mean-square radius and a suite of electroweak observables. We also extend
and test methods to extrapolate the ground state energy, point proton
root-mean-square radius, and electric quadrupole moment. We attain improved
estimates of these observables in the No-Core Full Configuration approach by
using basis spaces up through N=18 that enable more definitive
comparisons with experiment. Using the Density Matrix Renormalization Group
approach with the JISP16 interaction, we find that we can significantly improve
the convergence of the Gamow Shell Model treatment of the Li ground state
and resonance by adopting a natural orbital single-particle
basis.Comment: 25 pages, 18 figure
Nuclear structure in Parity Doublet Model
Using an extended parity doublet model with the hidden local symmetry, we
study the properties of nuclei in the mean field approximation to see if the
parity doublet model could reproduce nuclear properties and also to estimate
the value of the chiral invariant nucleon mass preferred by nuclear
structure. We first determined our model parameters using the inputs from free
space and from nuclear matter properties. Then, we study some basic nuclear
properties such as the nuclear binding energy with several different choices of
the chiral invariant mass. We observe that our results, especially the nuclear
binding energy, approach the experimental values as is increased until
MeV and start to deviate more from the experiments afterwards with
larger than MeV, which may imply that MeV is
preferred by some nuclear properties.Comment: 8 pages, 2 figure
Ab initio no core full configuration approach for light nuclei
Comprehensive understanding of the structure and reactions of light nuclei poses theoretical and computational challenges. Still, a number of ab initio approaches have been developed to calculate the properties of atomic nuclei using fundamental interactions among nucleons. Among them, we work with the ab initio no core full configuration (NCFC) method and ab initio no core Gamow Shell Model (GSM). We first review these approaches and present some recent results
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