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Article
Report number	nucl-th/0409062
Title	Nuclear Structure Calculations with Coupled Cluster Methods from Quantum Chemistry
Related title	Nuclear Structure Calculations with Coupled Cluster Methods from Quantum Chemistry
Author(s)	Dean, D.J. (Oak Ridge ; Oslo U.) ; Gour, J.R. (Michigan State U.) ; Hagen, G. (Oslo U.) ; Hjorth-Jensen, M. (Oslo U. ; CERN ; Michigan State U.) ; Kowalski, K. (Michigan State U.) ; Papenbrock, T. (Oak Ridge ; Tennessee U.) ; Piecuch, P. (Michigan State U.) ; Wloch, M. (Michigan State U.)
Publication	2005
Imprint	27 Sep 2004
Number of pages	10
In:	Nucl. Phys. A 752 (2005) 299-308
In:	22nd International Nuclear Physics Conference, Göteborg, Sweden, 27 Jun - 2 Jul 2004, pp.299-308
DOI	10.1016/j.nuclphysa.2005.02.041
Subject category	Nuclear Physics
Abstract	We present several coupled-cluster calculations of ground and excited states of 4He and 16O employing methods from quantum chemistry. A comparison of coupled cluster results with the results of exact diagonalization of the hamiltonian in the same model space and other truncated shell-model calculations shows that the quantum chemistry inspired coupled cluster approximations provide an excellent description of ground and excited states of nuclei, with much less computational effort than traditional large-scale shell-model approaches. Unless truncations are made, for nuclei like 16O, full-fledged shell-model calculations with four or more major shells are not possible. However, these and even larger systems can be studied with the coupled cluster methods due to the polynomial rather than factorial scaling inherent in standard shell-model studies. This makes the coupled cluster approaches, developed in quantum chemistry, viable methods for describing weakly bound systems of interest for future nuclear facilities.
Copyright/License	Elsevier B.V.

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