期刊
PHYSICAL REVIEW C
卷 90, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.90.064619
关键词
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资金
- Natural Sciences and Engineering Research Council (NSERC)
- National Research Council of Canada
- Unites States-Israel Binational Science Foundation [2012212]
- Pazy Foundation
- MIUR [PRIN-2009TWL3MX]
- Office of Nuclear Physics, US Department of Energy (University of Tennessee) [DE-FG02-96ER40963]
- Office of Nuclear Physics, US Department of Energy (NUCLEI SciDAC collaboration) [DE-SC0008499]
- Field Work Proposal [ERKBP57]
- Office of Science of the US Department of Energy [DE-AC05-00OR22725]
- computational resources of the National Center for Computational Sciences
- National Institute for Computational Sciences
- TRIUMF
We combine the coupled-cluster method and the Lorentz integral transform for the computation of inelastic reactions into the continuum. We show that the bound-state-like equation characterizing the Lorentz integral transform method can be reformulated based on extensions of the coupled-cluster equation-of-motion method, and we discuss strategies for viable numerical solutions. Starting from a chiral nucleon-nucleon interaction at next-to-next-to-next-to-leading order, we compute the giant dipole resonances of He-4, O-16,O-22, and Ca-40, truncating the coupled-cluster equation-of-motion method at the two-particle-two-hole excitation level. Within this scheme, we find a low-lying E1 strength in the neutron-rich O-22 nucleus, which compares fairly well with data from Leistenschneider et al. [Phys. Rev. Lett. 86, 5442 (2001)]. We also compute the electric dipole polarizability in Ca-40. Deficiencies of the employed Hamiltonian lead to overbinding, too-small charge radii, and a too-small electric dipole polarizability in Ca-40.
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