International Conference on Nuclear Data for Science and Technology 2007
DOI: 10.1051/ndata:07291

Self-consistent optical potential for α-particles at low energies

M. Avrigeanu¹, W. von Oertzen², A. Obreja¹, F.L. Roman¹ and V. Avrigeanu<sup>1

1</sup>  "Horia Hulubei" National Institute for Physics and Nuclear Engineering, P.O. Box MG-6, 76900 Bucharest, Romania
²  Freie Universität Berlin, Fachbereich Physik, 14195 Berlin, and Hahn-Meitner-Institut, 14109 Berlin, Germany

mavrig@ifin.nipne.ro

Published online: 21 May 2008

Abstract
A previous semi-microscopic analysis based on the double folding model, for the α-particle elastic scattering on A ~ 100 nuclei at energies below 32 MeV, is enlarged for medium mass nuclei up to A ~ 120 and energies below 50 MeV. The energy-dependent phenomenological imaginary part for this semi-microscopic optical model potential (OMP) was obtained, making use also of the dispersive correction to the microscopic real potential. A regional OMP parameter set for low-energy α-particles has been obtained as well for nuclei within the above-mentioned mass range. It has been proved able to describe both scattering and α-particle induced reaction data, through the statistical model analysis of most accurate data of total α-reaction cross sections for ⁴⁸Ti and ⁵¹V, and (α,n) reaction cross sections for the target nuclei ⁴⁵Sc, ^46,48Ti, ⁵¹V, ⁵⁰Cr and ⁵⁴Fe and incident energies lower than 11-12 MeV.

© CEA 2008