Three-body model calculation of the 2${}^{+}$ state in ${}^{26}$O

Abstract

We discuss the energy of the excited 2${}^{+}$ state in the unbound nucleus ${}^{26}$O using the three-body model of ${}^{24}$O+$n$+$n$. This model fully takes into account the continuum effects as well as the dineutron correlation of the valence neutrons. The present calculation yields the energy of 1.354 MeV, which is slightly smaller than the unperturbed energy, 1.54 MeV. The energy shifts for the ground and the 2${}^{+}$ states with respect to the unperturbed energy suggest that 0${}^{+}$ and the 2${}^{+}$ states in ${}^{26}$O show a typical spectrum well described by a short-range pairing interaction acting on two valence nucleons in the same orbit.

arXiv comment4 pages, 1 figure

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Cited by in corpus (9)

• Structure and decays of nuclear three-body systems: the Gamow coupled-channel method in Jacobi coordinates
• Decay dynamics of the unbound ${}^{25}$O and ${}^{26}$O nuclei
• Three-body correlations in the ground-state decay of 26O
• Exploring manifestation and nature of a dineutron in two-neutron emission using a dynamical dineutron model
• Are there good probes for the di-neutron correlation in light neutron-rich nuclei?
• Three-body model for an isoscalar spin-triplet neutron-proton pair in ${}^{102}\mathrm{Sb}$
• Beyond the neutron-drip line: two-neutron decay of unbound nuclei
• Neutron-pair structure in the continuum spectrum of ${}^{26}$O
• Two-nucleon Correlations in the Decay of Unbound Nuclei beyond the Drip Lines