In this talk, I present results from ab-initio nuclear structure calculations. Using coupled-cluster theory, we compute the binding energies and life times of Helium isotopes. Using a renormalized interaction of the low-momentum type, basic properties of the helium chain are reproduced, i.e. He-5,7 are unbound, He-8 is bound, and He-6 is nearly bound at the CCSD level. The decay widths of unbound nuclei are in semiquantitative agreement with experimental data. I will also show new results on structure calculations that involve three-nucleon forces.
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