Effective Interaction Techniques for the Gamow Shell Model

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dc.creatorHagen, G.
dc.creatorHjorth-Jensen, M.
dc.creatorVaagen, J. S.
dc.date2004-10-27
dc.date.accessioned2026-07-07T05:40:40Z
dc.date.available2026-07-07T05:40:40Z
dc.descriptionWe apply a contour deformation technique in momentum space to the newly developed Gamow shell model, and study the drip-line nuclei 5He, 6He and 7He. A major problem in Gamow shell-model studies of nuclear many-body systems is the increasing dimensionality of many-body configurations due to the large number of resonant and complex continuum states necessary to reproduce bound and resonant state energies. We address this problem using two different effective operator approaches generalized to the complex momentum plane. These are the Lee-Suzuki similarity transformation method for complex interactions and the multi-reference perturbation theory method. The combination of these two approaches results in a large truncation of the relevant configurations compared with direct diagonalization. This offers interesting perspectives for studies of weakly bound systems.
dc.description18 pages, 17 figs, Revtex4
dc.identifierhttps://arxiv.org/abs/nucl-th/0410114
dc.identifierhttp://arxiv.org/abs/nucl-th/0410114
dc.identifierPhys.Rev. C71 (2005) 044314
dc.identifierdoi:10.1103/PhysRevC.71.044314
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/82322
dc.subjectNuclear Theory
dc.subjectMathematical Physics
dc.subjectAtomic Physics
dc.titleEffective Interaction Techniques for the Gamow Shell Model
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