Neutron excess in analytical expressions for fusion barrier parameters
Department of Physics, The University of Ioannina, 45110, Ioannina, Greece
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The neutron excess dependence of heavy-ion fusion barriers is investigated, guided by predictions of different ion-ion potentials. We develop phenomenological expressions for the fusion barrier radii and heights, involving both the entrance channel mass asymmetry and neutron excess of the projectile and target. Compared to commonly used formulas, the developed expressions reproduce theoretical barrier parameters with a higher accuracy. Furthermore, they provide a means to assess the importance of the neutron excess degree of freedom implied by each potential.
© Società Italiana di Fisica and Springer-Verlag, 2004