Ab initio no-core solutions for Li-6
Artikel i vetenskaplig tidskrift, 2017

We solve for properties of Li-6 in the ab initio no-core full configuration (NCFC) approach and we separately solve for its ground state and J(pi) = 2(2)(+) resonance with the Gamow shell model (GSM) in the Berggren basis. We employ both the JISP16 and chiral NNLOopt realistic nucleon-nucleon interactions and investigate the ground state energy, excitation energies, point proton root mean square (rms) radius and a suite of electroweak observables. We also extend and test methods to extrapolate the ground state energy, point proton rms radius, and electric quadrupole moment. We attain improved estimates of these observables in the NCFC approach by using basis spaces up through N-max = 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 GSM treatment of the Li-6 ground state and J(pi) = 2(2)(+) resonance by adopting a natural orbital single-particle basis.

extrapolation

no-core full configuration

Gamow shell model

Författare

Ik Jae Shin

Institute for Basic Science

Youngman Kim

Institute for Basic Science

Pieter Maris

Iowa State University

J. P. Vary

Iowa State University

Christian Forssen

Chalmers, Fysik, Subatomär fysik och plasmafysik

Jimmy Rotureau

Chalmers, Fysik, Subatomär fysik och plasmafysik

N. Michel

Grand Accélérateur National d'Ions Lourds (GANIL)

Michigan State University

Journal of Physics G: Nuclear and Particle Physics

0954-3899 (ISSN)

Vol. 44 7 Article Number: 075103-

Ämneskategorier

Teoretisk kemi

DOI

10.1088/1361-6471/aa6cb7