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Ab initio no-core solutions for Li-6

I. J. Shin ; Y. Kim ; P. Maris ; J. P. Vary ; Christian Forssén (Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers)) ; Jimmy Rotureau (Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers)) ; N. Michel
Journal of Physics G-Nuclear and Particle Physics (0954-3899). Vol. 44 (2017), 7, p. Article Number: 075103.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: no-core full configuration; Gamow shell model; extrapolation



Denna post skapades 2017-07-14.
CPL Pubid: 250700

 

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Institutioner (Chalmers)

Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers)

Ämnesområden

Teoretisk kemi

Chalmers infrastruktur