期刊
PHYSICAL REVIEW LETTERS
卷 101, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.092502
关键词
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资金
- the U. S. Department of Energy [DE-AC05-00OR22725]
- UT-Battelle, LLC (Oak Ridge National Laboratory)
- University of Washington [DE-FC02-07ER41457]
- University of Tennessee [DE-FG02-96ER40963]
We compute the binding energies, radii, and densities for selected medium-mass nuclei within coupled-cluster theory and employ a bare chiral nucleon-nucleon interaction at next-to-next-to-next-to-leading order. We find rather well-converged results in model spaces consisting of 15 oscillator shells, and the doubly magic nuclei Ca-40, Ca-48, and the exotic Ni-48 are underbound by about 1 MeV per nucleon within the coupled-cluster singles-doubles approximation. The binding-energy difference between the mirror nuclei Ca-48 and Ni-48 is close to theoretical mass table evaluations. Our computation of the one-body density matrices and the corresponding natural orbitals and occupation numbers provides a first step to a microscopic foundation of the nuclear shell model.
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