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arXiv 0707.0767nucl-th
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连续统耦合与单核子重叠积分

Continuum Coupling and Single-Nucleon Overlap Integrals

N. Michel, W. Nazarewicz, M. Ploszajczak

摘要:

共振和非共振性质的粒子连续体的存在可以显著影响接近和高于粒子发射阈值的弱束缚核和激发核状态的光谱性质。在复动量平面上的连续壳模型(Gamow Shell模型)的框架下,讨论了连续耦合对富中子氦核和富中子氧核的单中子重叠积分和相关谱因子的显著影响。特别是,我们证明了一个特性的近阈值能量依赖的光谱因子为不同的l-波。我们还表明,现实的径向重叠功能,这是需要的转移反应的描述,可以产生的单粒子波函数的适当选择的复杂的潜力。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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