Threshold anomaly for the Be7+Ni58 system at near-Coulomb-barrier energies

A. Gómez Camacho and E. F. Aguilera
Phys. Rev. C 90, 064607 – Published 5 December 2014

Abstract

By using recent fusion cross section measurements for the weakly bound system Be7+Ni58 around the Coulomb barrier, a simultaneous χ2 analysis of elastic scattering and fusion cross section data is performed. The analysis is carried out with optical polarization potentials for the fusion and direct reaction processes. That is, the nuclear polarization potential UN is split into a volume part UF which accounts for fusion reactions and a surface part UDR that is responsible for direct reactions. The parameters of fusion and direct reaction Woods-Saxon polarization potentials are determined by the analysis of the data. The presence of the threshold anomaly is investigated from the energy dependence of these polarization potentials. It is found that, contrary to other weakly bound systems, the Be7+Ni58 reaction presents the usual threshold anomaly.

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  • Received 3 October 2014

DOI:https://doi.org/10.1103/PhysRevC.90.064607

©2014 American Physical Society

Authors & Affiliations

A. Gómez Camacho* and E. F. Aguilera

  • Departamento de Aceleradores, Instituto Nacional de Investigaciones Nucleares, Apartado Postal 18-1027, C. P. 11801, México, D. F.

  • *Corresponding author: arturo.gomez@inin.gob.mx

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Issue

Vol. 90, Iss. 6 — December 2014

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