Energy dependence of the optical potentials for the Be9+Pb208 and Be9+Bi209 systems at near-Coulomb-barrier energies

A. Gómez Camacho, N. Yu, H. Q. Zhang, P. R. S. Gomes, H. M. Jia, J. Lubian, and C. J. Lin
Phys. Rev. C 91, 044610 – Published 13 April 2015

Abstract

We analyze the energy dependence of the interacting optical potential, at near barrier energies, for two systems involving the weakly bound projectile Be9 and the heavy Pb208 and Bi209 targets, by the simultaneous fit of elastic scattering angular distributions and fusion excitation functions. The approach used consists of dividing the optical potential into two parts. A short-range potential VF+iWF that is responsible for fusion, and a superficial potential VDR+iWDR for direct reactions. It is found, for both systems studied, that the fusion imaginary potential WF presents the usual threshold anomaly (TA) observed in tightly bound systems, whereas the direct reaction imaginary potential WDR shows a breakup threshold anomaly (BTA) behavior. Both potentials satisfy the dispersion relation. The direct reaction polarization potential predominates over the fusion potential and so a net overall behavior is found to follow the BTA phenomenon.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 27 February 2015

DOI:https://doi.org/10.1103/PhysRevC.91.044610

©2015 American Physical Society

Authors & Affiliations

A. Gómez Camacho1,*, N. Yu2,3, H. Q. Zhang2, P. R. S. Gomes4, H. M. Jia4, J. Lubian2, and C. J. Lin2

  • 1Departamento de Aceleradores, Instituto Nacional de Investigaciones Nucleares, Apartado Postal 18-1027, C.P. 11801, México, D.F.
  • 2China Institute of Atomic Energy, Beijin 102413, China
  • 3Key Laboratory of Quark & Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China
  • 4Instituto de Fisica, Universidade Federal Fluminense, Avenida Litoranea s/n, Gragoatá, Niterói RJ 24210-340, Brazil

  • *arturo.gomez@inin.gob.mx

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 91, Iss. 4 — April 2015

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×