Abstract
We present first ab initio no-core shell model (NCSM) calculations using similarity renormalization group (SRG) transformed chiral two-nucleon () plus three-nucleon () interactions for nuclei throughout the -shell, particularly and . By introducing an adaptive importance truncation for the NCSM model space and an efficient -coupling scheme for the matrix elements, we are able to surpass previous NCSM studies including interactions. We present ground and excited states in and for model spaces up to including full interactions. We analyze the contributions of induced and initial interactions and probe induced terms through the sensitivity of the energies on the SRG flow parameter. Unlike for light -shell nuclei, SRG-induced contributions originating from the long-range two-pion terms of the chiral interaction are sizable in and .
- Received 13 May 2011
DOI:https://doi.org/10.1103/PhysRevLett.107.072501
© 2011 American Physical Society