Open $sd$-shell nuclei from first principles
Abstract
We extend the ab initio coupled-cluster effective interaction (CCEI) method to deformed open-shell nuclei with protons and neutrons in the valence space, and compute binding energies and excited states of isotopes of neon and magnesium. We employ a nucleon-nucleon and three-nucleon interaction from chiral effective field theory evolved to a lower cutoff via a similarity renormalization group transformation. We find good agreement with experiment for binding energies and spectra, while charge radii of neon isotopes are underestimated. For the deformed nuclei Ne and Mg we reproduce rotational bands and electric quadrupole transitions within uncertainties estimated from an effective field theory for deformed nuclei, thereby demonstrating that collective phenomena in -shell nuclei emerge from complex ab initio calculations.
Cite
@article{arxiv.1511.00757,
title = {Open $sd$-shell nuclei from first principles},
author = {G. R. Jansen and M. D. Schuster and A. Signoracci and G. Hagen and P. Navrátil},
journal= {arXiv preprint arXiv:1511.00757},
year = {2016}
}