Eur. Phys. J. A (2010) 44: 385-392
https://doi.org/10.1140/epja/i2010-10966-2

Regular Article - Experimental Physics

Interaction of loosely bound radioactive ⁷Be and stable ⁷Li with ⁹Be

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

^* e-mail: sverma@physics.du.ac.in

Received: 10 December 2009
Revised: 26 March 2010
Accepted: 29 March 2010
Published online: 25 April 2010

Abstract

Quasielastic scattering angular distributions have been measured for the ⁷Be + ⁹Be system at E _lab = 17 , 19 and 21MeV in the angular range = 24^° - 57^° . An optical model (OM) analysis of these data has been carried out in order to extract optical potential parameters and reaction cross-sections. One-proton stripping cross-sections were also measured for this system at E _lab = 19 and 21MeV. These transfer angular-distribution data were compared with the finite-range distorted-wave Born approximation (FRDWBA) calculations. For the ⁷Li + ⁹Be system quasielastic scattering angular distributions were measured and emitted light charged particles were detected at E _lab = 15.75 , 24.00 and 30.00MeV in the angular range = 7^° - 70^° . Fusion cross-sections were obtained by reproducing the measured -evaporation spectra from the compound nucleus at backward angles with the statistical model calculations. The ratios of the experimental fusion cross-sections to the total reaction cross-sections (obtained from OM analysis) were found to be small. This result suggests that the break-up process has a strong influence on the fusion process leading to a reduction in the fusion cross-section.