Closed-shell properties of O24 with ab initio coupled-cluster theory

We present a microscopic calculation of spectroscopic factors for neutron and proton removal from O24 using the coupled-cluster method and a state-of-the-art chiral nucleon-nucleon interaction at next-to-next-to-next-to- leading order. To account for the coupling to the scattering continuum we use a Berggren single-particle basis that treats bound, resonant, and continuum states on an equal footing. We report neutron removal spectroscopic factors for the O23 states Jπ=1/2⁺, 5/2⁺, 3/2^-, and 1/2 ^- and proton removal spectroscopic factors for the N23 states 1/2^- and 3/2^-. Our calculations support the accumulated experimental evidence that O24 is a closed-shell nucleus.