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arXiv 0907.5167nucl-thnucl-ex
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弱束缚系统的连续-连续耦合和极化势

Continuum-continuum coupling and polarization potentials for weakly bound system

L. F. Canto, J. Lubian, P. R. S. Gomes, M. S. Hussein

摘要:

研究了弱束缚核碰撞中连续态间耦合的影响。为了这个目的,我们比较截面完整的融合,分裂和弹性散射连续离散耦合通道(CDCC)计算,包括和不包括这些耦合。在我们的研究中,我们讨论了这种影响的极化电位再现弹性波函数的耦合耦合通道方法在单通道计算。我们发现,包括连续态之间的耦合呈现更排斥的极化势的实部,而它导致较弱的吸附到破碎通道。我们表明,在CDCC计算中不包括连续-连续耦合可能不会导致定性和定量的错误结论。

英文摘要:

We investigate the influence of couplings among continuum states in collisions of weakly bound nuclei. For this purpose, we compare cross sections for complete fusion, breakup and elastic scattering evaluated by continuum discretized coupled channel (CDCC) calculations, including and not including these couplings. In our study, we discuss this influence in terms of the polarization potentials that reproduce the elastic wave function of the coupled coupled channel method in single channel calculations. We find that the inclusion of couplings among the continuum states renders the real part of the polarization potential more repulsive, whereas it leads to weaker apsorption to the breakup channel. We show that the non-inclusion of continuum-continuum couplings in CDCC calculations may not lead to qualitative and quantitative wrong conclusions.

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