Eur. Phys. J. Special Topics 150, 75-78 (2007)
https://doi.org/10.1140/epjst/e2007-00270-0

Measurements of elastic scattering for ⁷Be, ⁷Li + ⁹Be systems and fusion cross sections for ⁷Li + ⁹Be system

¹ Department of Physics and Astrophysics, University of Delhi, Delhi, 110007, India
² Inter University Accelerator Centre, Delhi, 110067, India
³ Department of Physics, Gauhati University, Guwahati, 781014, India
⁴ Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai, 400085, India

Corresponding author: vermasvin@rediffmail.com

Received: 31 January 2007
Published online: 8 December 2007

Abstract

Elastic scattering angular distributions have been measured for ⁷Be + ⁹Be system at E_lab = 17, 19 and 21 MeV in the angular range θ_cm=26^○–58°, and for ⁷Li + ⁹Be system at E_lab= 15.75, 24 and 30 MeV. An optical model (OM) analysis of these data have been carried out. For the ⁷Li + ⁹Be system fusion cross sections were obtained at E_lab = 15.75, 24 and 30 MeV by measuring the α-evaporation spectra from the compound nucleus at backward angles. The measured α-evaporation spectra were reproduced by the statistical model calculations and fusion cross sections were extracted therefrom. The ratios of the experimental fusion cross sections to the total reaction cross sections (obtained form OM analysis) were found to be rather small. This result suggests that break-up process has a strong influence on fusion process leading to a reduction in fusion cross section.