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Ab initio no-core solutions for $^{6}$Li

Abstract : We solve for properties of 6Li in the ab initio No-Core Full Configuration approach and we separately solve for its ground state and Jπ=2+2 resonance with the Gamow Shell Model 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 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 Nmax=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 6Li ground state and Jπ=2+2 resonance by adopting a natural orbital single-particle basis.
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Contributor : Michel Lion <>
Submitted on : Sunday, June 25, 2017 - 7:12:14 PM
Last modification on : Monday, April 23, 2018 - 3:33:53 PM

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I.J. Shin, Y. Kim, P. Maris, J.P. Vary, C. Forssén, et al.. Ab initio no-core solutions for $^{6}$Li. Journal of Physics G Nuclear Physics, Institute of Physics (IOP), 2017, 44, 075103 (31pp). ⟨10.1088/1361-6471/aa6cb7⟩. ⟨in2p3-01546688⟩



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