Description of continuum structures in a discrete basis: Three-body resonances and two-nucleon decays

Abstract

Weakly bound and unbound three-body nuclei are studied by using the pseudostate method within the hyperspherical formalism. After introducing the theoretical framework, the method is applied first to the ${}^9$Be nucleus, showing a good agreement with the available data for its low-lying dipole response. Then, recent results on the structure and decay of the two-neutron emitters ${}^{26}$O and ${}^{16}$Be are presented. In particular, the role of the $\mathbf{n}$-$\mathbf{n}$ correlation in shaping their properties is discussed.

arXiv commentProceedings of the 24th European Conference of Few-Body Problems in Physics (EFB24); SciPost contribution

References in corpus (17)

• Evidence for the ground-state resonance of 26O
• Study of two-neutron radioactivity in the decay of 26O
• Cross Section Measurement of 9Be(γ,n)8Be and Implications for α+α+n -> 9Be in the r-Process
• Astrophysical reaction rate for ${}^9$Be formation within a three-body approach
• Astrophysical reaction rate for $\alpha (\alpha n,\gamma )$${}^9$Be by photodisintegration
• Three-body continuum discretization in a basis of transformed harmonic oscillator states
• Relative production rates of ${}^6$He, ${}^9$Be, ${}^{12}$C in astrophysical environments
• Correlated two-neutron emission in the decay of unbound nucleus 26O
• Local scale transformations and extended matter distributions in nuclei
• Low-temperature triple-alpha rate in a full three-body model
• ${}^9$Be elastic scattering on ${}^{208}$Pb and ${}^{27}$Al within a four-body reaction framework
• Identifying structures in the continuum: Application to ${}^{16}$Be
• Dependence of two-proton radioactivity on nuclear pairing models
• Decay dynamics of the unbound ${}^{25}$O and ${}^{26}$O nuclei
• Two-nucleon emitters within a pseudostate method: The case of ${}^6$Be and ${}^{16}$Be
• Three-body model for the two-neutron decay of ${}^{16}$Be
• Radiative capture and electromagnetic dissociation involving loosely bound nuclei: the ${}^8$B example

Cited by in corpus (1)

• Neutron-pair structure in the continuum spectrum of ${}^{26}$O