Systematics of $\alpha$--nucleus optical potentials

Abstract

Double--folded optical $\alpha$--nucleus potentials can be used to calculate elastic scattering cross sections in a wide mass-- and energy region. Because of the systematic behavior of the potential parameters we are able to obtain reliable optical potentials for astrophysically relevant reactions even without scattering data in low--energy region. As example we analyze the capture reaction ${^{144}{\rm Sm}}(α,γ){^{148}{\Gd}}$.

7 pages, LaTex, 3 figures available upon request to [email protected], IK-TUW-Preprint 9404402