Ab initio calculation of the spectrum and structure of ${}^{16}$O

Abstract

We present ab initio lattice calculations of the low-energy even-parity states of ${}^{16}$O using chiral nuclear effective field theory. We find good agreement with the empirical energy spectrum, and with the electromagnetic properties and transition rates. For the ground state, we find that the nucleons are arranged in a tetrahedral configuration of alpha clusters. For the first excited spin-0 state, we find that the predominant structure is a square configuration of alpha clusters, with rotational excitations that include the first spin-2 state.

4 pages, 4 figures, final version to appear in Phys. Rev. Lett

References in corpus (3)

• Chiral effective field theory and nuclear forces
• Structure and rotations of the Hoyle state
• Lattice chiral effective field theory with three-body interactions at next-to-next-to-leading order

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