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The Study of α-20Ne and 16O-20Ne Heavy-ions Scattering in the α+16O Model of 20Ne

Author: TanHaiLan
Tutor: YangYongZuo
School: Guangxi Normal University
Course: Theoretical Physics
Keywords: Nuclear cluster model folding potential α- 20Ne elastic scattering 16O - 20Ne elastic scattering
CLC: O571
Type: Master's thesis
Year: 2010
Downloads: 18
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Abstract


Based on theα+16O model of 20Ne nucleus and the 4αmodel of 16O nucleus, the folding potential for theα- 20Ne and 16O - 20Ne elastic scattering were derived by using theα-αandα- 16O interactions with theα(or 16O ) density in the 20Ne nucleus and theαdensity in the 16O nucleus. The imaginary part of the optical potential of the conventional phenomenological potential （Woods-Saxon shape） and the Woods-Saxon potential （volume potential） plus the derivative Woods-Saxon potential （surface potential） have been used in the present calculations. The elastic scattering ofα- 20Ne at incident energies of 12.7、16.8、25.8、27.0、31.1、54.1、104.1 MeV, and 16O - 20Ne at the energies of center of mass 24.5、27.9、28.2、29.1、31.7、32.1、33.0、35.5 MeV were analyzed using the obtained folding potential. The calculated results of theα- 20Ne and 16O - 20Ne elastic scattering angular distributions are in good agreement with the experimental data. With the imaginary potential of the Woods-Saxon potential （volume potential） plus the derivative Woods-Saxon potential （surface potential）, the better fits to the experimental data were obtained. The renormalization factors between 1.0-1.2 were needed to get better fits to the data, which have the volume integrates for the real potential a little larger than that obtained by other studies. The values of volume integrate for the imaginary potential are similar and consistent with those obtained by other studies. For the 16O - 20 Ne scattering, when using the imaginary potential with the surface term, the calculated angular distribution can very well describe the data, and the reasonable values of renormalization factor between 0.8-0.9, and volume integrates of the real potential between 339-368 MeV﹒fm3 were obtained. A parity-dependent imaginary potential has been used to describe the 16O - 20 Ne elastic scattering, and a successful description for the angular distributions were obtained except too much structure in the forward angles. The results of this paper show that, the folding potential for theα- 20Ne and 16O - 20Ne derived by theα+16O model of 20Ne nucleus can describe the angular distributions of theα- 20Ne and 16O - 20Ne elastic scattering reasonably, especially the backward rise in the elastic cross section.

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CLC: > Mathematical sciences and chemical > Physics > Nuclear physics,high energy physics > Nuclear physics
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