Optical potentials of halo and weakly bound nuclei

Details Optical potentials of halo and weakly bound nuclei Optical potentials of halo and weakly bound nuclei

2002-03-11

arxiv.org/abs/nucl-th/0203018v1

Nucl.Phys. A706 (2002) 322-334

Physics

Nuclear Physics

Nuclear Theory

18 Latex pages, 1 table, 1 eps figures, 3 ps figures. accepted to Nucl. Phys. A

Scientific paper

10.1016/S0375-9474(02)00755-8

The optical potential of halo and weakly bound nuclei has a long range part due to the coupling to breakup that damps the elastic scattering angular distributions at all angles for which the effect of the nuclear interaction is felt. In charge exchange reactions leading to a final state with a halo nucleus, the surface potential is responsible for a strong reduction in the absolute cross section. We show how the halo effect can be simply estimated semiclassically and related to the properties of the halo wave function. Assuming an exponential tail for the imaginary surface potential we show that the most important parameter is the diffusness $\alpha$ of the potential which is directly related to the decay length $\gamma_i$ of the initial wave function by $\alpha\approx(2\gamma_i)^{-1}$

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