Resonances of 7He in the complex scaling method

Abstract

We study the resonance spectroscopy of 7He in the 4He+n+n+n cluster model, where the motion of valence neutrons is described in the cluster orbital shell model. Many-body resonances are treated on the correct boundary condition as the Gamow states in the complex scaling method. We obtain five resonances and investigate their properties from the configurations. In particular, the 1/2- state is found in a low excitation energy of 1.1 MeV with a width of 2.2 MeV, while the experimental determination of the position of this state is not so clear. We also evaluate the spectroscopic factors of the 6He-n components in the obtained 7He resonances. The importance of the 6He(2+) state is shown in several states of 7He.

7 pages, 4 figures

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Cited by in corpus (26)

• Shell Model in the Complex Energy Plane
• Unified ab initio approach to bound and unbound states: no-core shell model with continuum and its application to 7He
• Microscopic study of 4-alpha-particle condensation with proper treatment of resonances
• Complex scaling : physics of unbound light nuclei and perspective
• Di-neutron clustering and deuteron-like tensor correlation in nuclear structure focusing on 11Li
• Role of the tensor interaction in He isotopes with a tensor-optimized shell model
• ${}^4\mathrm{He}$+$n$+$n$ continuum within an ab initio framework
• Validation of the ${}^{10}\mathrm{Be}$ Ground-State Molecular Structure Using ${}^{10}\mathrm{Be}(p,p\alpha {)}^6\mathrm{He}$ Triple Differential Reaction Cross-Section Measurements
• Five-body resonances of 8He using the complex scaling method
• Five-body resonances of 8C using the complex scaling method
• Pairing in the continuum: the quadrupole response of the Borromean nucleus 6He
• One-neutron removal strength of 7He into 6He using the complex scaling method
• Resonant states of neutron-rich $\Lambda$ hypernucleus ${}_{\Lambda }^7$He
• Electric multipole response of the halo nucleus ${}^6$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
• Five-body resonances in ${}^8$He and ${}^8$C using the complex scaling method
• Mirror symmetry breaking in He isotopes and their mirror nuclei
• Soft dipole resonance in neutron-rich ${}^8$He
• Investigation of contributions of the $2_2^{+}$ resonance in ${}^6$He via analysis of ${}^6$He($p$, $p^{\prime }$)
• First measurement of the 2.4 and 2.9 MeV ${}^6$He three-cluster resonant states via the ${}^3$H(${}^4$He,p$\alpha$)2n four-body reaction
• Continuum discretized BCS approach for weakly bound nuclei
• Direct observation of three-neutron emission from ${}^7$He${}^{\ast }$ and the search for the trineutron
• Nonlinear relativistic mean-field theory studies on He isotopes
• Physics of many-body resonances with complex scaling and applications to light unstable nuclei
• Resonances and continuum states of drip-line nuclei using the complex scaling method