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  1. University of Mandalay
  1. University of Mandalay
  2. Department of Physics

Large Enhancement of Heavy-Ion Fusion Cross section at Energies around the Coulomb Barrier

http://hdl.handle.net/20.500.12678/0000005128
http://hdl.handle.net/20.500.12678/0000005128
e0f2c435-17ba-4684-b07d-c46d24021917
ea05aabe-5c87-457f-a915-27b6c19174b4
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Title
Title Large Enhancement of Heavy-Ion Fusion Cross section at Energies around the Coulomb Barrier
Language en
Publication date 2009-09-02
Authors
Kyaw Thiha
Nyein Wink Lwin
Washiyama, K.
Description
The purpose of this research paper is to review some basics of theoretical approaches to Heavy-ion fusion reactions at energies around the Coulomb barrier. In the parabolic approximation of a barrier the transmission coefficients are given by the Hill-Wheeler expression and the cross section is given by the Wong formula; this is the so-called uncoupled fusion. The one dimensional model can describe the fusion of light systems like 14N+12C, 12C+29Si and 16O+27Al. However, it fails to reproduce the experimental data of the excitation function of the fusion cross section for heavy systems such as 40Ca+62Ni, 40Ar+144Sm and 16O+154,148,144Sm. Large enhancements of fusion cross section against predictions of the potential model can be caused by the coupling of the relative motion between the colliding nuclei to other degrees of freedom, e.g. their intrinsic excitations, nuclear transfer and etc. They are called channel-coupling effects. These effects can be effectively expressed in terms of distribution of potential barriers.
Keywords
Heavy-ion subbarrier fusion reaction, Penetrability, Nucleus-nucleus potential, Fusion barrier distribution
Journal articles
1
Lashio University Research Journal
53-66
1
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