One-neutron removal strength of 7He into 6He using the complex scaling method

Abstract

We study the one-neutron removal strength of the 7He ground state, which provides us with the 6He-n component in 7He. The He isotopes are described on the basis of the 4He+Xn cluster model (X=1,2,3). The complex scaling method is applied to describe not only the Gamow resonances but also the nonresonant continuum states of valence neutrons, with the correct boundary condition of particle decays. The one-neutron removal strength of 7He into the unbound states of 6He is calculated using the complex-scaled Green's function, in which a complex-scaled complete set of 4He+n+n states is adopted. Using this framework, we investigate resonant and nonresonant contributions of the strength, which individually produce specific structures in the distributions. In addition, we propose a method to obtain the real-value strength using the complex values of spectroscopic factors of Gamow states. As a result, the 6He(2+) resonance is found to give the largest contribution.

11 pages, 10 figures, Corrected typos

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Cited by in corpus (12)

• Microscopic study of 4-alpha-particle condensation with proper treatment of resonances
• Complex scaling : physics of unbound light nuclei and perspective
• Role of the tensor interaction in He isotopes with a tensor-optimized shell model
• Five-body resonances of 8He using the complex scaling method
• Five-body resonances of 8C using the complex scaling method
• Resonant states of neutron-rich $\Lambda$ hypernucleus ${}_{\Lambda }^7$He
• Interplay between the 0+_2 resonance and the nonresonant continuum of the drip-line two-neutron halo nucleus 22C
• Four-body resonances of 7B using the complex scaling method
• Mirror symmetry breaking in He isotopes and their mirror nuclei
• Direct observation of three-neutron emission from ${}^7$He${}^{\ast }$ and the search for the trineutron
• Resonances and continuum states of drip-line nuclei using the complex scaling method
• Nonlinear relativistic mean-field theory studies on He isotopes