Closed-shell properties of ${}^{24}$O with {\em ab initio} coupled-cluster theory

Abstract

We present an \emph{ab initio} calculation of spectroscopic factors for neutron and proton removal from ${}^{24}$O using the coupled-cluster method and a state-of-the-art chiral nucleon-nucleon interaction at next-to-next-to-next-to-leading order. In 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 ${}^{23}$O states $J^{\pi }=1/2^{+}$, $5/2^{+}$, $3/2^{-}$ and $1/2^{-}$, and proton removal spectroscopic factors for the ${}^{23}$N states $1/2^{-}$ and $3/2^{-}$. Our calculations support the accumulated experimental evidence that ${}^{24}$O is a closed-shell nucleus.

5 pages, 2 figures, 1 table

References in corpus (7)

• Shell Model in the Complex Energy Plane
• Medium-mass nuclei from chiral nucleon-nucleon interactions
• Solution of the center-of-mass problem in nuclear structure calculations
• Complex coupled-cluster approach to an ab-initio description of open quantum systems
• Threshold Effects in Multi-channel Coupling and Spectroscopic Factors in Exotic Nuclei
• Ab-initio computation of neutron-rich oxygen isotopes
• Gamow shell-model calculations of drip-line oxygen isotopes