Journal of Nuclear and Radiochemical Sciences
Online ISSN : 1883-5813
Print ISSN : 1345-4749
ISSN-L : 1345-4749
Nuclear Halo and Its Related Reactions
Huanqiao Zhang
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2006 Volume 7 Issue 1 Pages R7-R12

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Abstract
The experimental results of the proton halo nuclei 27P, as well as probably 29S, and the neutron halo in excited states of the nuclei 12B and 13C are presented. The probability of the valence nucleon (s) being out of the binding potential have been extracted systematically from the relevant experimental data, and a new condition for nuclear halo occurrence is proposed. Based on our systematical study, we put forward our scaling laws of nuclear halo in terms of the analytical expressions of the expectation value for the operator r2 in a finite square-well potential. In order to investigate the breakup effects of the weakly bound projectiles on fusion reactions and barrier distributions, the complete fusion cross sections of 6Li + 208Pb and the elastic and quasi-elastic excitation functions of 6, 7Li, 9Be + 208Pb were measured and compared with the predictions of the coupled-channels model. The dynamical effects on fusion of neutron-rich nuclei at the energies around the Coulomb barrier are discussed in terms of the comparison of the measured fusion data of 48Ca + 90, 96Zr with the calculations of the improved quantum molecular dynamics model and coupled-channels theory.
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© The Japan Society of Nuclear and Radiochemical Sciences
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