Active space coupled cluster calculation of open-shell nuclei
ORAL
Abstract
We present an active space coupled-cluster approach to the calculations of open-shell nuclei. The Hilbert space of the Hamiltonian is split into an active and external space. Cluster operators in the active space are determined through a spherical shell model calculation. The contributions of 4-particle-4-hole excitations adjacent to the Fermi surface are captured, and the rotation invariance of the system is preserved in the active space. The cluster operators in the external space (coupled to the active space) are determined through the standard coupled cluster. We applied the method to the low-lying states of 20Ne and 12C and compared it with the angular momentum projected coupled-cluster calculations.
*This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Award Numbers DEFG02-96ER40963 (University of Tennessee), DE-SC0008499 (SciDAC-3 NUCLEI), DE-SC0018223 (SciDAC-4 NUCLEI), DE-SC0015376 (Double-Beta Decay Topical Collaboration), and the Field Work Proposals ERKBP57 and ERKBP72 at Oak Ridge National Laboratory (ORNL). Computer time was provided by the Innovative and Novel Computational Impact on Theory and Experiment (INCITE) program. This research used resources of the Oak Ridge Leadership Computing Facility located at ORNL, which is supported by the Office of Science of the Department of Energy under Contract No. DE-AC05-00OR22725.
–
Presenters
-
Zhonghao Sun
- Oak Ridge National Lab
- Oak Ridge National Laboratory