dorsal/arxiv
View SchemaCoupled-cluster calculations for valence systems around O-16
| Authors | J. R. Gour, P. Piecuch, M. Hjorth-Jensen, M. Wloch, D. J. Dean |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0507049 |
| URL | https://arxiv.org/abs/nucl-th/0507049 |
| DOI | 10.1103/PhysRevC.74.024310 |
| Journal | Phys.Rev. C74 (2006) 024310 |
Abstract
We study the ground and low-lying excited states of O-15, O-17, N-15, and F-17 using modern two-body nucleon-nucleon interactions and the suitably designed variants of the ab initio equation-of-motion coupled-cluster theory aimed at an accurate description of systems with valence particles and holes. A number of properties of O-15, O-17, N-15, and F-17, including ways the energies of ground and excited states of valence systems around O-16 change as functions of the number of nucleons, are correctly reproduced by the equation-of-motion coupled-cluster calculations. Within a harmonic oscillator basis and large effective model spaces, our results are converged for the chosen two-body Hamiltonians. Thus, all disagreements with experiment are, most likely, due to the degrees of freedom such as three-body interactions not accounted for in our effective two-body Hamiltonians. In particular, the calculated binding energies of O-15/N-15 and O-17/F-17 enable us to rationalize the discrepancy between the experimental and recently published [Phys. Rev. Lett. 94, 212501 (2005)] equation-of-motion coupled-cluster excitation energies for the Jpi=3- state of O-16. The results demonstrate the feasibility of the equation-of-motion coupled-cluster methods to deal with valence systems around closed-shell nuclei and to provide precise results for systems beyond A=16.
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"abstract": "We study the ground and low-lying excited states of O-15, O-17, N-15, and\nF-17 using modern two-body nucleon-nucleon interactions and the suitably\ndesigned variants of the ab initio equation-of-motion coupled-cluster theory\naimed at an accurate description of systems with valence particles and holes. A\nnumber of properties of O-15, O-17, N-15, and F-17, including ways the energies\nof ground and excited states of valence systems around O-16 change as functions\nof the number of nucleons, are correctly reproduced by the equation-of-motion\ncoupled-cluster calculations. Within a harmonic oscillator basis and large\neffective model spaces, our results are converged for the chosen two-body\nHamiltonians. Thus, all disagreements with experiment are, most likely, due to\nthe degrees of freedom such as three-body interactions not accounted for in our\neffective two-body Hamiltonians. In particular, the calculated binding energies\nof O-15/N-15 and O-17/F-17 enable us to rationalize the discrepancy between the\nexperimental and recently published [Phys. Rev. Lett. 94, 212501 (2005)]\nequation-of-motion coupled-cluster excitation energies for the Jpi=3- state of\nO-16. The results demonstrate the feasibility of the equation-of-motion\ncoupled-cluster methods to deal with valence systems around closed-shell nuclei\nand to provide precise results for systems beyond A=16.",
"arxiv_id": "nucl-th/0507049",
"authors": [
"J. R. Gour",
"P. Piecuch",
"M. Hjorth-Jensen",
"M. Wloch",
"D. J. Dean"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.74.024310",
"journal_ref": "Phys.Rev. C74 (2006) 024310",
"title": "Coupled-cluster calculations for valence systems around O-16",
"url": "https://arxiv.org/abs/nucl-th/0507049"
},
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