Continuum Coupling and Single-Nucleon Overlap Integrals

Details Continuum Coupling and Single-Nucleon Overlap Integrals Continuum Coupling and Single-Nucleon Overlap Integrals

2007-07-05

arxiv.org/abs/0707.0767v2

Nucl.Phys.A794:29-46,2007

Physics

Nuclear Physics

Nuclear Theory

9 figures; 23 pages; corrected version; accepted in Nuclear Physics A

Scientific paper

10.1016/j.nuclphysa.2007.07.004

The presence of a particle continuum, both of a resonant and non-resonant character, can significantly impact spectroscopic properties of weakly bound nuclei and excited nuclear states close to, and above, the particle emission threshold. In the framework of the continuum shell model in the complex momentum-plane, the so-called Gamow Shell Model, we discuss salient effects of the continuum coupling on the one-neutron overlap integrals and the associated spectroscopic factors in neutron-rich helium and oxygen nuclei. In particular, we demonstrate a characteristic near-threshold energy dependence of the spectroscopic factors for different l-waves. We show also that the realistic radial overlap functions, which are needed for the description of transfer reactions, can be generated by single-particle wave functions of the appropriately chosen complex potential.

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