Three-body Description of $2n$-Halo and Unbound $2n$-Systems: ${}^{22}$C and ${}^{26}$O

Abstract

We study the two-neutron correlations in the ground state of the weakly-bound two-neutron halo nucleus ${}^{22}$C sitting at the edge of the neutron-drip line and also in the unbound nucleus ${}^{26}$O sitting beyond the neutron dripline. For the present study, we employ a three-body (core$+n+n$) structure model designed for describing the two-neutron halo system by explicit inclusion of unbound continuum states of the subsystem (core$+n$). We use either a density-independent or a density-dependent contact-delta interaction to describe the neutron-neutron interaction and its strength is varied to fix the binding energy. We report the configuration mixing in the ground state of these systems for different choices of pairing interactions.

arXiv comment4 Pages, 1 Figure, 2 Tables. 13th International Conference on Nucleus-Nucleus Collisions (NN2018)

References in corpus (7)

• Direct mass measurements of 19B, 22C, 29F, 31Ne, 34Na and other light exotic nuclei
• ${}^{22}$C: $S$-Wave Two-Neutron Halo
• Search for ${}^{21}$C and constraints on ${}^{22}$C
• Decay dynamics of the unbound ${}^{25}$O and ${}^{26}$O nuclei
• Pairing in the continuum: the quadrupole response of the Borromean nucleus 6He
• Electric multipole response of the halo nucleus ${}^6$He
• Two-neutron correlations in a Borromean ${}^{20}\mathrm{C}+n+n$ system: Sensitivity of unbound subsystems

Cited by in corpus (1)

• Impact of uncertainties of unbound ${}^{10}$Li on the ground state of two-neutron halo ${}^{11}$Li